TWI620604B - Metal plate with screw hole, housing, and manufacturing method of metal plate with screw hole - Google Patents
Metal plate with screw hole, housing, and manufacturing method of metal plate with screw hole Download PDFInfo
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- TWI620604B TWI620604B TW103125148A TW103125148A TWI620604B TW I620604 B TWI620604 B TW I620604B TW 103125148 A TW103125148 A TW 103125148A TW 103125148 A TW103125148 A TW 103125148A TW I620604 B TWI620604 B TW I620604B
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- Prior art keywords
- wall portion
- metal plate
- screw hole
- hole
- screw
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- 239000002184 metal Substances 0.000 title claims abstract description 234
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 234
- 238000004519 manufacturing process Methods 0.000 title claims description 51
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- 238000005553 drilling Methods 0.000 claims description 61
- 238000012545 processing Methods 0.000 claims description 38
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 17
- 238000005452 bending Methods 0.000 claims description 11
- 238000007596 consolidation process Methods 0.000 description 19
- 238000012986 modification Methods 0.000 description 16
- 230000004048 modification Effects 0.000 description 16
- 238000002474 experimental method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 238000004080 punching Methods 0.000 description 10
- 238000010079 rubber tapping Methods 0.000 description 9
- 230000009467 reduction Effects 0.000 description 8
- 238000003754 machining Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/24—Making other particular articles nuts or like thread-engaging members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
- B21D19/10—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws working inwardly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/02—Nuts or like thread-engaging members made of thin sheet material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
- F16B37/122—Threaded inserts, e.g. "rampa bolts"
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Plates (AREA)
- Punching Or Piercing (AREA)
- Forging (AREA)
- Finishing Walls (AREA)
- Domestic Plumbing Installations (AREA)
- Door And Window Frames Mounted To Openings (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
本發明之附有螺絲孔之金屬板之螺絲孔具有從金屬板之其中一面立起之圓筒狀外壁部及從前述外壁部之端緣翻折至前述外壁部之內側之圓筒狀內壁部，並於前述內壁部之內周面形成有陰螺紋。 The screw hole of the metal plate with the screw hole of the present invention has a cylindrical outer wall portion rising from one side of the metal plate and a cylindrical inner wall folded from the end edge of the outer wall portion to the inner side of the outer wall portion And a female thread is formed on the inner circumferential surface of the inner wall portion.
Description
本發明是有關於附有螺絲孔之金屬板、框體、及附有螺絲孔之金屬板的製造方法。更詳而言之，其是有關於於薄板化時亦可具有與陽螺絲之固結力優異之螺絲孔並且亦可防止該螺絲孔之破損的附有螺絲孔之金屬板、具有該附有螺絲孔之金屬板之框體、及前述附有螺絲孔之金屬板的製造方法。 The present invention relates to a metal plate with a screw hole, a frame, and a method of manufacturing a metal plate with a screw hole. More specifically, it is a metal plate with a screw hole which is also provided with a screw hole which is excellent in the reinforcing force of the male screw when it is thinned, and which is also prevented from being damaged by the screw hole. The frame of the metal plate of the screw hole and the manufacturing method of the metal plate with the screw hole mentioned above.
本案依據2013年07月25日於日本提申之日本專利申請案2013-154105號，主張優先權，並於此引用其內容。 The present application claims priority based on Japanese Patent Application No. 2013-154105, filed on Jan.
空氣調節機之室外機或變電設備之框體大多使用以切割加工或彎曲加工加工成各種形狀之金屬板。由於此種金屬板與構成框體之其他金屬板或附屬零件之安裝部份大幅使用螺絲構造，故有於金屬板塑造螺絲孔之情形。 Most of the frames of the outdoor unit or the substation of the air conditioner are formed into metal plates of various shapes by cutting or bending. Since the metal plate and the mounting portion of the other metal plate or the accessory member constituting the frame body are largely screw-shaped, there is a case where the metal plate is formed with a screw hole.
圖11是示意顯示習知金屬板具有之螺絲孔的圖， 是在包含螺絲孔之中心軸線之截面觀看時之縱截面圖。該圖顯示有具有螺絲孔之金屬板510，為易理解其結構，進一步以假想線顯示陽螺絲550、具有貫穿孔551a之另一金屬板551。該圖所示之金屬板510具有發揮螺絲孔之作用之圓筒狀縱壁部511(以下，有將此縱壁部511稱為螺絲孔511之情形)。縱壁部511之一端與金屬板本體513相連，並於內周面形成有陰螺紋511b。對此金屬板510疊合具有貫穿孔551a之金屬板551而安裝之際，藉將陽螺絲550***至貫穿孔551a而旋入螺絲孔511內來結合。此螺絲孔511因可使用衝緣加工(burring)形成於金屬板，加工最簡便而被廣泛使用。 Figure 11 is a view schematically showing a screw hole of a conventional metal plate, It is a longitudinal cross-sectional view when viewed in a section including the central axis of the screw hole. The figure shows a metal plate 510 having a screw hole. To understand the structure, the male screw 550 and the other metal plate 551 having the through hole 551a are further shown by imaginary lines. The metal plate 510 shown in the figure has a cylindrical vertical wall portion 511 that functions as a screw hole (hereinafter, the vertical wall portion 511 is referred to as a screw hole 511). One end of the vertical wall portion 511 is connected to the metal plate body 513, and a female screw 511b is formed on the inner circumferential surface. When the metal plate 510 is attached to the metal plate 551 having the through hole 551a and mounted thereon, the male screw 550 is inserted into the through hole 551a and screwed into the screw hole 511 to be coupled. This screw hole 511 is formed on a metal plate by burring, and is most easily used for processing.
圖12A及圖12B是示意顯示習知金屬板之螺絲孔之加工製程之一例的縱截面圖，圖12A顯示鑽孔步驟，圖12B顯示衝緣步驟。加工螺絲孔511時，首先，於加工對象之金屬板520鑽鑿預鑽孔。預鑽孔之鑽鑿可藉剪切加工或切削加工進行。以剪切加工鑽鑿預鑽孔時，使用如圖12A所示之鑽孔用衝頭531及鑽孔用衝模532。藉使衝頭531及衝模532相對地接近，將金屬板520之一部份與衝頭531一同推入衝模532之貫穿孔內。結果，以分別設於衝頭531及衝模532之刀片切下金屬板520之一部份使之分離而鑽鑿預鑽孔。 12A and 12B are longitudinal cross-sectional views schematically showing an example of a process for manufacturing a screw hole of a conventional metal plate, and Fig. 12A shows a drilling step, and Fig. 12B shows a step of punching. When the screw hole 511 is machined, first, a pre-drilled hole is drilled in the metal plate 520 to be processed. Pre-drilling can be done by shearing or cutting. When drilling a pre-drilled hole by shearing, a drilling punch 531 and a drilling die 532 as shown in Fig. 12A are used. If the punch 531 and the die 532 are relatively close, a portion of the metal plate 520 is pushed into the through hole of the die 532 together with the punch 531. As a result, a portion of the metal plate 520 is cut by a blade provided in the punch 531 and the die 532, respectively, to separate and drill the pre-drilled hole.
鑽鑿有預鑽孔之金屬板520以衝緣加工成形作為縱壁部之伸長凸緣。如圖12B所示，衝緣加工使用衝緣用衝頭533、衝緣用衝模534及坯料夾539。在衝緣加工中，在以衝模534及坯料夾539挾持金屬板520之狀態下，使衝頭533、衝模534及坯料夾539移動成相對地接近，而將金屬板520之 預鑽孔之周圍部份與衝頭533一同推入衝模534之凹部內。結果，金屬板520之預鑽孔之周圍部份於衝頭533之推入方向伸長，同時亦於徑方向擴大，結果，成形圓筒狀伸長凸緣、亦即縱壁部511。 A pre-drilled metal plate 520 is drilled to form an elongated flange as a vertical wall portion. As shown in Fig. 12B, the punching process uses a punching punch 533, a punching die 534, and a blank holder 539. In the burring process, in a state where the metal plate 520 is held by the die 534 and the blank 539, the punch 533, the die 534, and the blank 539 are moved relatively close to each other, and the metal plate 520 is placed. The peripheral portion of the pre-drilled hole is pushed into the recess of the die 534 together with the punch 533. As a result, the peripheral portion of the pre-drilled hole of the metal plate 520 is elongated in the pushing direction of the punch 533, and is also enlarged in the radial direction, and as a result, the cylindrical elongated flange, that is, the vertical wall portion 511 is formed.
於如此成形之圓筒狀縱壁部511之內周面使用例如螺絲攻(無圖示)來加工陰螺紋511b，藉此，可於金屬板520塑造螺絲孔511。 The female screw 511b is machined on the inner circumferential surface of the cylindrical vertical wall portion 511 thus formed by, for example, tapping (not shown), whereby the screw hole 511 can be formed in the metal plate 520.
關於金屬板之螺絲孔，如專利文獻1所示，迄今已提出有多種。專利文獻1提出之框體於其構成構件中之第2板金構件形成有螺絲孔。第2板金構件之螺絲孔具有形成為板金構件之端緣翻折而彼此對向配置之第1平板部及第2平板部。第2板金構件之螺絲孔更具有第1圓筒部及第2圓筒部，該第1圓筒部從第1平板部突出成圓筒狀並且於內周面具有螺合部，該第2圓筒部從第2平板部突出成圓筒狀並且於內周面具有螺合部，且與第1圓筒部排成約直列。根據此第2板金構件，說明了由於陰螺紋作為螺合部而形成於第1圓筒部及第2圓筒部之內周面，故與陽螺絲接觸之軸方向之尺寸長而可確保緊固力矩。 As for the screw hole of the metal plate, as shown in Patent Document 1, various types have been proposed so far. The frame proposed in Patent Document 1 has a screw hole formed in the second sheet metal member of the constituent member. The screw hole of the second sheet metal member has a first flat plate portion and a second flat plate portion which are formed so that the end edges of the sheet metal members are folded and opposed to each other. The screw hole of the second sheet metal member further includes a first cylindrical portion and a second cylindrical portion. The first cylindrical portion protrudes from the first flat plate portion into a cylindrical shape and has a screwing portion on the inner peripheral surface. The cylindrical portion protrudes from the second flat plate portion into a cylindrical shape and has a screw portion on the inner peripheral surface, and is arranged in line with the first cylindrical portion. According to the second sheet metal member, since the female screw is formed as the screwing portion on the inner circumferential surface of the first cylindrical portion and the second cylindrical portion, the axial direction of the contact with the male screw is long, and the tightness can be ensured. Solid torque.
又，於專利文獻2揭示有一種構造，該構造使形成有第1筒狀部之第1薄板與形成有第2筒狀部之第2薄板疊合成將第1筒狀部以同軸之方式嵌入前述第2筒狀部內後，從第2薄板側使自攻螺釘螺合於第1筒狀部之內周面，藉此，將第2薄板對第1薄板固結。 Further, Patent Document 2 discloses a structure in which a first thin plate in which a first cylindrical portion is formed and a second thin plate in which a second cylindrical portion is formed are laminated, and the first tubular portion is coaxially embedded. After the inside of the second cylindrical portion, the self-tapping screw is screwed to the inner circumferential surface of the first cylindrical portion from the second thin plate side, whereby the first thin plate is consolidated to the first thin plate.
專利文獻1 日本專利公開公報2011-214802號 Patent Document 1 Japanese Patent Laid-Open Publication No. 2011-214802
專利文獻2 日本專利公開公報2012-241839號 Patent Document 2 Japanese Patent Laid-Open Publication No. 2012-241839
在如圖11所示之習知金屬板510之螺絲孔中，於以衝緣加工成形之縱壁部(伸長凸緣)511之內周面形成有陰螺紋511b。如此以衝緣加工塑造之螺絲孔511隨著用於家電製品或汽車零件等之要求輕量化之金屬板的薄板化，與陽螺絲之固結力降低。又，因螺絲孔511之變形，呈螺絲孔511之螺牙與陽螺絲550之螺牙不咬合之狀態、即亦有螺絲孔511破損之情形。 In the screw hole of the conventional metal plate 510 shown in Fig. 11, a female screw 511b is formed on the inner circumferential surface of the vertical wall portion (elongated flange) 511 which is formed by punching. The screw hole 511 which is formed by the burr processing is reduced in thickness with respect to the metal plate which is required to be lightweight for use in home electric appliances or automobile parts, and the fixing force of the male screw is lowered. Further, due to the deformation of the screw hole 511, the screw hole of the screw hole 511 and the screw of the male screw 550 do not engage, that is, the screw hole 511 is broken.
又，在前述專利文獻1中，提出一種結構，該結構是螺絲孔具有彼此對向配置之第1平板部及第2平板部，於該等第1平板部及第2平板部分別設具有螺合部之圓筒部。根據此結構，說明了使與陽螺絲接觸之陰螺紋之軸方向的尺寸長而可確保緊固力矩。形成此螺絲孔時，於第1平板部鑽鑿預鑽孔後，進行衝緣加工，藉此，設圓筒部，並且於第2平板部鑽鑿預鑽孔後，進行衝緣加工，藉此，設圓筒部，之後，第1平板部翻折成疊合於第2平板部，進一步需加工陰螺紋。如此，加工需要6個步驟，加工數大幅增加。又，第1平板部翻折成疊合於第2平板部之際，需使2個圓筒部之中心相互一致，而要求高彎折精確度。因該等，當於金屬 板加工記載於專利文獻1之螺絲孔時，有加工成本大幅上升之問題。 Moreover, in the above-mentioned Patent Document 1, there is proposed a structure in which the screw holes have a first flat plate portion and a second flat plate portion which are disposed to face each other, and the first flat plate portion and the second flat plate portion are respectively provided with screws. The cylindrical part of the joint. According to this configuration, it has been described that the length of the female screw that is in contact with the male screw is long in the axial direction, and the tightening torque can be secured. When the screw hole is formed, the pre-drilling is performed on the first flat plate portion, and then the burring process is performed. Thereby, the cylindrical portion is provided, and the pre-drilled hole is drilled in the second flat plate portion, and the burring process is performed. Here, the cylindrical portion is provided, and thereafter, the first flat plate portion is folded over to be superposed on the second flat plate portion, and further, a female screw is required to be processed. Thus, the processing requires six steps, and the number of processing is greatly increased. Further, when the first flat plate portion is folded over to overlap the second flat plate portion, the centers of the two cylindrical portions are required to coincide with each other, and high bending accuracy is required. Because of this, when it is metal When the sheet processing is described in the screw hole of Patent Document 1, there is a problem that the processing cost is greatly increased.
再者，在前述專利文獻2，如其段落編號[0014]記載有「由於使第1筒狀部於半徑方向外側膨脹而壓接第2筒狀部，故諸薄板不致鬆脫而穩固地以螺絲構件固定」，使第1筒狀部及第2筒狀部間無間隙，藉此，以防止第1薄板及第2薄板間之相對之位置偏離為目標。 In the above-mentioned Patent Document 2, the paragraph number [0014] describes that "the second cylindrical portion is pressed by the first tubular portion in the radial direction, so that the thin plates are not loosened and the screws are firmly fixed. The member is fixed to have no gap between the first tubular portion and the second tubular portion, thereby preventing the relative positional deviation between the first thin plate and the second thin plate from being targeted.
在此構造中，當第2筒狀部之內徑與第1筒狀部之外徑之尺寸差大時，即使使第1筒狀部往半徑方向外側膨脹，亦無法完全壓接第2筒狀部，結果，有無法獲得上述效果之虞。是故，為獲得足夠之固結力，宜使上述尺寸差(間隙尺寸)小至某程度，但此難以進行第1筒狀部嵌入第2筒狀部內之作業，而依情況，儘管未正確地嵌合，但仍有誤旋入自攻螺釘之虞。此時，當然無法確實地固定第1薄板及第2薄板間。而且因此種螺絲孔一般不僅設一處而是設有多處，故不可否認引發此種作業疏失之機率並不低。因而，從可確實地獲得足夠之固結力之觀點，專利文獻2之構造未必足夠。 In this configuration, when the difference between the inner diameter of the second tubular portion and the outer diameter of the first tubular portion is large, even if the first tubular portion is expanded radially outward, the second cylinder cannot be completely crimped. As a result, there is a flaw in the above effects. Therefore, in order to obtain sufficient consolidation force, it is preferable to make the above-described dimensional difference (gap size) small to some extent, but it is difficult to perform the operation of embedding the first cylindrical portion in the second cylindrical portion, and it is not correct, as the case may be. The ground is fitted, but there is still a mistake in screwing into the self-tapping screw. At this time, of course, the first thin plate and the second thin plate cannot be reliably fixed. Moreover, the screw holes are generally not only provided in one place but in multiple places, so it is undeniable that the probability of causing such work is not low. Therefore, the configuration of Patent Document 2 is not necessarily sufficient from the viewpoint that a sufficient consolidation force can be surely obtained.
本發明鑑於上述情況而發明，目的是提供可減低加工成本之上升並且薄板化時螺絲孔與陽螺絲之固結力亦優異且可防止螺絲孔之破損的附有螺絲孔之金屬板、具有此附有螺絲孔之金屬板之框體及附有螺絲孔之金屬板的製造方法。 The present invention has been made in view of the above circumstances, and an object of the invention is to provide a metal plate with a screw hole which can reduce the increase in processing cost and which is excellent in the fixing force of the screw hole and the male screw when the thin plate is formed, and can prevent the screw hole from being damaged. A frame for a metal plate with a screw hole and a method for manufacturing a metal plate with a screw hole.
本案發明人等為解決上述問題，分析在圖11所說明、因習知金屬板薄板化而引起之螺絲之固結力降低或破損現象，而獲得了下述(a)~(d)之主要原因。 In order to solve the above problems, the inventors of the present invention have analyzed the reduction of the fixing force of the screw caused by the thinning of the metal plate as illustrated in Fig. 11, and have obtained the following main causes of (a) to (d). .
(a)在衝緣加工，隨著圓筒狀縱壁部511之成形，縱壁部511之根部部份厚度減少。此外，「根部部份」是指在圖11如以2點鏈線包圍所示，縱壁部511之與金屬本體513相連之部份511a。 (a) In the burr processing, the thickness of the root portion of the vertical wall portion 511 is reduced as the cylindrical vertical wall portion 511 is formed. Further, the "root portion" means a portion 511a of the vertical wall portion 511 which is connected to the metal body 513 as shown by a two-dot chain line in Fig. 11.
(b)因將螺溝加工至因上述(a)之厚度減少而變薄之根部部份為止，而產生板厚非常薄之處。 (b) Since the groove is machined to the root portion which is thinned by the thickness reduction of the above (a), the thickness is extremely thin.
(c)該板厚非常薄之處彈性變形，固結力降低。又，陽螺絲550之旋入(鎖入)作業之際，於板厚非常薄之處產生塑性變形，而有螺絲孔511破損之情形或臻至破裂之情形。 (c) The plate is extremely thin and elastically deformed, and the fixing force is lowered. Further, when the male screw 550 is screwed in (locked in), plastic deformation occurs at a very thin plate thickness, and the screw hole 511 is broken or broken.
(d)於陽螺絲550之旋入作業或擰鬆作業等之際，圓筒狀縱壁部511於擴徑方向塑性變形，而有螺絲孔511之螺牙與陽螺絲550之螺牙抵接之面積減少的情形。此時，發生固結力降低，亦有臻至螺絲孔511破損之情形。 (d) The cylindrical vertical wall portion 511 is plastically deformed in the diameter expansion direction, and the screw having the screw hole 511 is in contact with the screw of the male screw 550, during the screwing operation or the unscrewing operation of the sun screw 550. The area where the area is reduced. At this time, the consolidation force is lowered, and the screw hole 511 is broken.
根據該等現象而致力檢討之結果，本案發明人等想到，將螺絲孔構成為從金屬板立起之圓筒狀外壁部與從該外壁部翻折至內側而成之圓筒狀內壁部之二重壁，進一步，於內壁部之內周面形成陰螺紋。藉此，即使使金屬板之板厚薄時，螺絲孔與陽螺絲之固結力仍優異，並且可防止螺絲孔之破損。 As a result of the review, the inventors of the present invention thought that the screw hole is configured as a cylindrical outer wall portion that rises from the metal plate and a cylindrical inner wall portion that is folded from the outer wall portion to the inner side. The double wall further has a female thread formed on the inner circumferential surface of the inner wall portion. Thereby, even when the thickness of the metal plate is made thin, the screw hole and the male screw are excellent in the fixing force, and the screw hole can be prevented from being damaged.
又，本案發明人等想到，螺絲孔之另一態樣之結構是構成為從金屬板立起之圓筒狀內壁部與從該內壁部翻折至 外側而成之圓筒狀外壁部之二重壁，進一步於內壁部之內周面形成陰螺紋，此結構亦可獲得大致相同之效果。 Further, the inventors of the present invention have conceived that the other aspect of the screw hole is configured such that the cylindrical inner wall portion rises from the metal plate and is folded from the inner wall portion to The double wall of the cylindrical outer wall portion formed on the outer side further forms a female thread on the inner circumferential surface of the inner wall portion, and this structure can obtain substantially the same effect.
本發明依據上述見解而完成，於以下顯示其要點。 The present invention has been completed based on the above findings, and the gist thereof is shown below.
(1)本發明之一態樣為一種附有螺絲孔之金屬板，是具有螺絲孔之金屬板，前述螺絲孔具有從前述金屬板之其中一面立起之圓筒狀外壁部、及從前述外壁部之端緣翻折至前述外壁部之內側之圓筒狀內壁部；並於前述內壁部之內周面形成有陰螺紋。 (1) One aspect of the present invention is a metal plate having a screw hole, which is a metal plate having a screw hole, the screw hole having a cylindrical outer wall portion rising from one side of the metal plate, and from the foregoing An end edge of the outer wall portion is folded over to a cylindrical inner wall portion inside the outer wall portion, and a female screw is formed on an inner circumferential surface of the inner wall portion.
(2)在如上述(1)之附有螺絲孔之金屬板中，前述內壁部之前端與前述金屬板之另一面亦可在同一平面。 (2) In the metal plate with the screw hole as in the above (1), the front end of the inner wall portion and the other surface of the metal plate may be in the same plane.
(3)在如上述(1)之附有螺絲孔之金屬板中，亦可採用下述結構，前述結構是在陽螺絲未螺合於前述螺絲孔之陰螺紋之狀態下，前述內壁部之外周面與前述外壁部之內周面拉開間隔，在前述陽螺絲螺合於前述螺絲孔之前述陰螺紋之狀態下，前述內壁部之前述外周面之至少一部份抵接前述外壁部之前述內周面。 (3) In the metal plate with the screw hole as in the above (1), the following structure may be employed, wherein the inner wall portion is in a state where the male screw is not screwed to the female screw of the screw hole. The outer circumferential surface is spaced apart from the inner circumferential surface of the outer wall portion, and at least a portion of the outer circumferential surface of the inner wall portion abuts the outer wall in a state where the male screw is screwed to the female screw of the screw hole. The aforementioned inner circumference of the Ministry.
(4)為如在上述(3)之附有螺絲孔之金屬板時，前述內壁部之前端與前述金屬板之另一面亦可在同一平面。 (4) In the case of the metal plate with the screw hole attached to the above (3), the front end of the inner wall portion and the other surface of the metal plate may be in the same plane.
(5)本發明之另一態樣為一種附有螺絲孔之金屬板，是具有螺絲孔之金屬板；前述螺絲孔具有從前述金屬板之其中一面立起之圓筒狀內壁部及從前述內壁部之端緣翻折至前述內壁部之外側之圓筒狀外壁部；並於前述內壁部之內周面形成有陰螺紋。 (5) Another aspect of the present invention is a metal plate with a screw hole, which is a metal plate having a screw hole; the screw hole has a cylindrical inner wall portion rising from one side of the metal plate and An end edge of the inner wall portion is folded over to a cylindrical outer wall portion on the outer side of the inner wall portion, and a female screw is formed on an inner circumferential surface of the inner wall portion.
(6)本發明之又另一態樣為一種框體，其具備具有螺絲孔之金屬板、具有貫穿孔之構件、以***前述貫穿孔之狀態旋入前述螺絲孔而將前述金屬板及前述具有貫穿孔之構件結合之陽螺絲；前述金屬板為如上述(1)至(5)中任一項之附有螺絲孔之金屬板。 (6) Still another aspect of the present invention is a housing comprising a metal plate having a screw hole, a member having a through hole, and the screw hole inserted into the through hole to insert the metal plate and the foregoing A male screw having a member in which a through hole is coupled; the metal plate is a metal plate having a screw hole as in any one of the above (1) to (5).
(7)本發明之再另一態樣為製造如上述(1)至(4)中任一項之附有螺絲孔之金屬板的方法，其具有以下步驟：於前述金屬板成形前述外壁部及相連於前述外壁部之內側之圓板部；於前述圓板部之中心鑽鑿預鑽孔；將鑽鑿有前述預鑽孔之前述圓板部彎折至前述外壁部之內側而成形前述內壁部；於業經成形之前述內壁部之前述內周面加工前述陰螺紋。 (7) A further aspect of the invention, the method of manufacturing the metal plate with the screw hole according to any one of the above (1) to (4), comprising the step of: forming the outer wall portion on the metal plate And a circular plate portion connected to the inner side of the outer wall portion; a pre-drilled hole is drilled in a center of the circular plate portion; and the circular plate portion drilled with the pre-drilled hole is bent to an inner side of the outer wall portion to form the foregoing The inner wall portion; the female inner thread is processed on the inner circumferential surface of the inner wall portion formed by the inner wall portion.
(8)在如上述(7)之附有螺絲孔之金屬板的製造方法中，在於厚度尺寸t(mm)之前述金屬板成形前述外壁部及前述圓板部之步驟中，亦可使用具有滿足下述算式(a)之半徑R(mm)之肩部尺寸的衝頭。 (8) In the method of manufacturing a metal plate having a screw hole as described in the above (7), in the step of forming the outer wall portion and the disk portion by the metal plate having a thickness t (mm), A punch that satisfies the shoulder size of the radius R (mm) of the following formula (a).
0.5≦R/t≦1.0 算式(a) 0.5≦R/t≦1.0 Equation (a)
(9)在如上述(7)之附有螺絲孔之金屬板的製造方法中，在於厚度尺寸t(mm)之前述金屬板鑽鑿前述預鑽孔之步驟中，亦可將前述預鑽孔鑽鑿為前述預鑽孔之半徑r(mm)滿足下述算式(b)。 (9) In the method of manufacturing a metal plate with a screw hole as in the above (7), in the step of drilling the aforementioned pre-drilled hole in the metal plate having a thickness dimension t (mm), the pre-drilling may be performed The radius r (mm) of the pre-drilled hole is drilled to satisfy the following formula (b).
0.5≦r/t≦1.2 算式(b) 0.5≦r/t≦1.2 Equation (b)
(10)在如上述(7)之附有螺絲孔之金屬板的製造方法中，在於厚度尺寸t(mm)之前述金屬板成形前述外壁部及前述 圓板部之步驟中，亦可使用具有滿足下述算式(a)之半徑R(mm)之肩部尺寸的衝頭，在於前述金屬板鑽鑿前述預鑽孔之步驟中，將前述預鑽孔鑽鑿為前述預鑽孔之半徑r(mm)滿足下述算式(b)。 (10) In the method of manufacturing a metal plate with a screw hole as described in the above (7), the outer wall portion is formed by the metal plate having a thickness t (mm) and In the step of the circular plate portion, a punch having a shoulder size satisfying the radius R (mm) of the following formula (a) may be used, in the step of drilling the aforementioned pre-drilled hole of the metal plate, the pre-drilling The hole drilling is such that the radius r (mm) of the aforementioned pre-drilled hole satisfies the following formula (b).
0.5≦R/t≦1.0 算式(a) 0.5≦R/t≦1.0 Equation (a)
0.5≦r/t≦1.2 算式(b) 0.5≦r/t≦1.2 Equation (b)
(11)本發明之另一態樣為製造如上述(1)至(4)中任一項之附有螺絲孔之金屬板的方法，其具有開孔步驟、外壁部及圓板部成形步驟、內壁部成形步驟及加工步驟，該開孔步驟於前述金屬板鑽鑿預鑽孔；該外壁部及圓板部成形步驟與前述預鑽孔同心地成形前述外壁部、及相連於前述外壁部之內側之圓板部；該內壁部成形步驟將前述圓板部彎折至前述外壁部之內側而成形前述內壁部；該加工步驟於前述內壁部之前述內周面加工前述陰螺紋。 (11) A method of manufacturing a metal plate with a screw hole according to any one of the above (1) to (4), comprising an opening step, an outer wall portion, and a disk portion forming step a step of forming the inner wall portion and a processing step of drilling the pre-drilled hole in the metal plate; the step of forming the outer wall portion and the circular plate portion forming the outer wall portion concentrically with the pre-drilled hole, and connecting to the outer wall a circular plate portion on the inner side of the portion; the inner wall portion forming step of bending the disk portion to the inner side of the outer wall portion to form the inner wall portion; and the processing step of processing the yin on the inner circumferential surface of the inner wall portion Thread.
(12)在如上述(11)之附有螺絲孔之金屬板的製造方法中，在於厚度尺寸t(mm)之前述金屬板成形前述外壁部及前述圓板部之步驟中，亦可使用具有滿足下述算式(a)之半徑R(mm)之肩部尺寸的衝頭。 (12) In the method of manufacturing a metal plate having a screw hole as described in the above (11), in the step of forming the outer wall portion and the disk portion by the metal plate having a thickness t (mm), A punch that satisfies the shoulder size of the radius R (mm) of the following formula (a).
0.5≦R/t≦1.0 算式(a) 0.5≦R/t≦1.0 Equation (a)
(13)在如上述(11)之附有螺絲孔之金屬板的製造方法中，在於厚度尺寸t(mm)之前述金屬板鑽鑿前述預鑽孔之步驟中，亦可將前述預鑽孔鑽鑿為形成前述圓板部之步驟後之前述預鑽孔的半徑r(mm)滿足下述算式(b)。 (13) In the method of manufacturing a metal plate with a screw hole as in the above (11), in the step of drilling the aforementioned pre-drilled hole in the metal plate having a thickness dimension t (mm), the pre-drilling may be performed The radius r (mm) of the aforementioned pre-drilled hole after the step of forming the aforementioned circular plate portion satisfies the following formula (b).
0.5≦r/t≦1.2 算式(b) 0.5≦r/t≦1.2 Equation (b)
(14)在如上述(11)之附有螺絲孔之金屬板的製造方法中，在於厚度尺寸t(mm)之前述金屬板成形前述外壁部及前述圓板部之步驟中，亦可使用具有滿足下述算式(a)之半徑R(mm)之肩部尺寸的衝頭，在於前述金屬板鑽鑿前述預鑽孔之步驟中，將前述預鑽孔鑽鑿為形成前述圓板部之步驟後之前述預鑽孔的半徑r(mm)滿足下述算式(b)。 (14) In the method of manufacturing a metal plate having a screw hole as described in the above (11), the step of forming the outer wall portion and the disk portion by the metal plate having a thickness t (mm) may be used. A punch that satisfies the shoulder size of the radius R (mm) of the following formula (a) is a step of drilling the pre-drilled hole into the circular plate portion in the step of drilling the aforementioned pre-drilled hole in the metal plate The radius r (mm) of the aforementioned pre-drilled hole satisfies the following formula (b).
0.5≦R/t≦1.0 算式(a) 0.5≦R/t≦1.0 Equation (a)
0.5≦r/t≦1.2 算式(b) 0.5≦r/t≦1.2 Equation (b)
如上述(1)~(4)之本發明一態樣之附有螺絲孔之金屬板具有具外壁部及從該外壁部翻折至內側而成之內壁部的二重壁構造。根據此結構，使陽螺絲螺合於內壁部之陰螺紋之際，內壁部承受陽螺絲之按壓力而將推展至徑方向外側，但由於以位於其周圍之外壁部支撐，故可限制內壁部過度之變形。結果，可防止因螺絲孔之破損或內壁部過度擴徑而引起之固結力的降低。 The metal plate with the screw hole according to the above aspect (1) to (4) of the present invention has a double wall structure having an outer wall portion and an inner wall portion which is folded from the outer wall portion to the inner side. According to this configuration, when the male screw is screwed to the female screw of the inner wall portion, the inner wall portion is pushed to the outer side in the radial direction by the pressing force of the male screw, but can be restrained by being supported by the wall portion located at the outer periphery thereof. Excessive deformation of the inner wall. As a result, it is possible to prevent a decrease in the fixing force due to breakage of the screw hole or excessive expansion of the inner wall portion.
以固結力之觀點，進一步言之，因將內壁部翻折至外壁部之內側而成形加工之際產生的彈回效果，而呈一直對內壁部授與縮徑方向之彈性力。結果，由於將陽螺絲旋入內壁部之陰螺絲之際，形成為對陽螺絲一直壓制陰螺紋而密合之狀態，故可確保不產生鬆脫之高固結力。 Further, from the viewpoint of the consolidation force, the elastic effect of the diameter reduction direction is always applied to the inner wall portion because the inner wall portion is folded over to the inner side of the outer wall portion to form a springback effect. As a result, since the male screw is screwed into the female screw of the inner wall portion, the male screw is pressed and the female screw is pressed to be in close contact with each other, so that a high consolidation force without loosening can be ensured.
以防止破損之觀點進一步言之，由於外壁部未形成習知所有之陰螺紋，故可防止此外壁部之根部部份因形成陰螺紋而更薄而易破損。又，雖然在內壁部之根部部份，形 成有陰螺紋，但由於其周圍形成以外壁部包覆之二重壁構造，故不易破損。如此，由於在螺絲孔之2處之各彎折部份可確保高強度，故可防止破損。 Further, in view of the prevention of breakage, since the outer wall portion does not form a conventional female thread, it is possible to prevent the root portion of the outer wall portion from being thinner and easily broken due to the formation of the female thread. Also, although the root portion of the inner wall portion is shaped It has a female thread, but it is not easily damaged because it forms a double wall structure surrounded by an outer wall. In this way, since each of the bent portions of the screw holes can ensure high strength, damage can be prevented.
如以上所說明，根據本態樣之附有螺絲孔之金屬板，即使使其板厚薄，螺絲孔與陽螺絲之固結力仍優異，並且可防止螺絲孔之破損。 As described above, according to the metal plate with the screw hole in this aspect, even if the plate thickness is small, the screw hole and the male screw are excellent in the fixing force, and the screw hole can be prevented from being damaged.
根據上述(5)之態樣之附有螺絲孔之金屬板，具有具內壁部及從該內壁部翻折至外側而成之外壁部之二重壁構造。根據此結構，使陽螺絲螺合於內壁部之陰螺紋之際，內壁部承受陽螺絲之按壓力而將推展至徑方向外側，但由於以位於其周圍之外壁部支撐，故可限制內壁部過度之變形。結果，可防止因螺絲孔之破損或內壁部過度擴徑而引起之固結力的降低。 The metal plate with the screw hole according to the aspect of the above (5) has a double wall structure having an inner wall portion and an outer wall portion which is folded from the inner wall portion to the outer side. According to this configuration, when the male screw is screwed to the female screw of the inner wall portion, the inner wall portion is pushed to the outer side in the radial direction by the pressing force of the male screw, but can be restrained by being supported by the wall portion located at the outer periphery thereof. Excessive deformation of the inner wall. As a result, it is possible to prevent a decrease in the fixing force due to breakage of the screw hole or excessive expansion of the inner wall portion.
如上述(6)之態樣之框體因具備上述附有螺絲孔之金屬板，故螺絲孔與陽螺絲之固結力優異，並且可防止螺絲孔之破損。是故，可防止已旋入之陽螺絲鬆脫。 Since the frame body according to the above aspect (6) is provided with the above-mentioned metal plate with the screw hole, the screw hole and the male screw are excellent in the fixing force, and the screw hole can be prevented from being damaged. Therefore, it can prevent the screw that has been screwed in from loosening.
如上述(7)~(14)之態樣之附有螺絲孔之金屬板的製造方法如上述，可於金屬板加工固結力優異並且可防止破損之螺絲孔。而且可減低加工數及加工成本之增加。 As described above, in the method of manufacturing the metal plate with the screw holes as described in the above (7) to (14), the screw hole having excellent fixing force and preventing breakage can be processed on the metal plate. Moreover, the number of processing and the increase in processing cost can be reduced.
10，100，110，200，510‧‧‧附有螺絲孔之金屬板 10,100,110,200,510‧‧‧Metal plates with screw holes
10a，513‧‧‧金屬板之本體 10a, 513‧‧‧ body of metal plate
10x‧‧‧表面 10x‧‧‧ surface
10y‧‧‧金屬板之另一面 10y‧‧‧The other side of the metal plate
12，212‧‧‧螺絲孔 12,212‧‧‧ screw holes
12a，212a‧‧‧外壁部 12a, 212a‧‧‧External wall
12a1‧‧‧外壁部之根部部份 12a1‧‧‧The root part of the outer wall
12a2‧‧‧另一端 12a2‧‧‧The other end
12b，212b‧‧‧內壁部 12b, 212b‧‧‧ Inner Wall
12b1，212b1‧‧‧陰螺紋 12b1, 212b1‧‧‧ female thread
12b3‧‧‧內壁部之前端 12b3‧‧‧ front end of the inner wall
12c‧‧‧內壁部之根部部份 12c‧‧‧ the root part of the inner wall
20，220‧‧‧金屬板 20,220‧‧‧Metal plates
20a‧‧‧外壁部 20a‧‧‧Outer wall
20b‧‧‧圓板部 20b‧‧‧round board
20b1‧‧‧預鑽孔 20b1‧‧‧Pre-drilling
31‧‧‧鑽孔用衝頭 31‧‧‧Drilling punch
32‧‧‧鑽孔用衝模 32‧‧‧Drilling die
35‧‧‧撐壓用衝頭 35‧‧‧Pressure punch
36‧‧‧撐壓用衝模 36‧‧‧Pressure die
36a‧‧‧坯料夾 36a‧‧‧Binder clip
37‧‧‧擴孔用衝頭 37‧‧‧Reaming punch
38‧‧‧擴孔用衝模 38‧‧‧Reaming die
39‧‧‧坪料夾 39‧‧ ‧ ping clip
40‧‧‧螺絲攻 40‧‧‧ Screw tap
50，550‧‧‧陽螺絲 50,550‧‧‧yang screws
51‧‧‧構件(金屬板) 51‧‧‧Members (metal plates)
51a，551a‧‧‧貫穿孔 51a, 551a‧‧‧through holes
70‧‧‧框體 70‧‧‧ frame
511‧‧‧縱壁部(螺絲孔) 511‧‧‧Vertical wall (screw hole)
511a‧‧‧與本體相連之部份 511a‧‧‧Parts connected to the main body
511b‧‧‧陰螺紋 511b‧‧‧ female thread
520‧‧‧加工對象之金屬板 520‧‧‧Metal plates for processing objects
531‧‧‧鑽孔用衝頭 531‧‧‧Drilling punch
532‧‧‧鑽孔用衝模 532‧‧‧Drilling die
533‧‧‧衝緣用衝頭 533‧‧‧With the punch
534‧‧‧衝緣用衝模 534‧‧‧Pressure die
539‧‧‧坯料夾 539‧‧‧Binder clips
551‧‧‧金屬板 551‧‧‧Metal sheet
A‧‧‧部(圖1) A‧‧‧ (Figure 1)
A‧‧‧陰螺紋開始塑性變形之點(圖10) A‧‧‧The point at which the female thread begins to plastically deform (Figure 10)
B‧‧‧交點 B‧‧‧ intersection
CL‧‧‧螺絲孔之中心軸線 CL‧‧‧Center axis of the screw hole
L,L’‧‧‧直線 L, L’‧‧‧ Straight line
L1，L2‧‧‧內壁部之長度尺寸 L1, L2‧‧‧ length dimension of the inner wall
O‧‧‧從固定狀態轉為增加之點 O‧‧‧From the fixed state to the point of increase
R‧‧‧部 R‧‧‧
r‧‧‧預鑽孔之半徑 r‧‧‧Pre-drilling radius
t‧‧‧板厚 T‧‧‧ plate thickness
X‧‧‧箭號 X‧‧‧ arrows
圖1是示意顯示本發明第1實施形態之附有螺絲孔之金屬板的螺絲孔之圖，為在包含螺絲孔之中心軸之截面觀看時的縱截面圖。 1 is a view schematically showing a screw hole of a metal plate with a screw hole according to a first embodiment of the present invention, and is a longitudinal cross-sectional view when viewed in a cross section of a central axis including a screw hole.
圖2是圖1之A部之放大圖，是旋入自攻螺釘前之圖。 Fig. 2 is an enlarged view of a portion A of Fig. 1 and is a view before being screwed into a self-tapping screw.
圖3是圖1之A部之放大圖，是旋入自攻螺釘後之圖。 Fig. 3 is an enlarged view of a portion A of Fig. 1 and is a view after screwing in a self-tapping screw.
圖4是顯示該實施形態之框體之分解立體圖。 Fig. 4 is an exploded perspective view showing the casing of the embodiment.
圖5A是說明該實施形態之附有螺絲孔之金屬板的製造方法之圖，為顯示加工流程中之外壁部成形步驟之截面圖。 Fig. 5A is a view for explaining a method of manufacturing a metal plate with a screw hole according to the embodiment, and is a cross-sectional view showing a step of forming an outer wall portion in the processing flow.
圖5B是顯示該加工流程之接續於外壁部成形步驟之後之鑽孔步驟的截面圖。 Figure 5B is a cross-sectional view showing the drilling step following the forming step of the outer wall portion of the processing flow.
圖5C是顯示該加工流程之接續於鑽孔步驟之後之內壁部成形步驟的截面圖。 Fig. 5C is a cross-sectional view showing the step of forming the inner wall portion following the drilling step of the processing flow.
圖5D是顯示該加工流程之接續於內壁部成形步驟之後之陰螺紋形成步驟的截面圖。 Fig. 5D is a cross-sectional view showing the step of forming the female thread after the forming step of the inner wall portion of the processing flow.
圖6A是說明該實施形態之附有螺絲孔之金屬板的製造方法之變形例之圖，顯示加工流程中之鑽孔步驟的截面圖。 Fig. 6A is a view showing a modification of the method of manufacturing a metal plate with a screw hole according to the embodiment, and showing a cross-sectional view of a drilling step in the machining flow.
圖6B是顯示該變形例之加工流程之接續於鑽孔步驟之後之外壁部成形步驟的截面圖。 Fig. 6B is a cross-sectional view showing the step of forming the outer wall portion after the drilling step in the processing flow of the modification.
圖6C是顯示該變形例之加工流程之接續於外壁部成形步驟之後之內壁部成形步驟的截面圖。 Fig. 6C is a cross-sectional view showing the step of forming the inner wall portion subsequent to the step of forming the outer wall portion in the processing flow of the modification.
圖6D是顯示該變形例之加工流程之接續於內壁部成形步驟之後之陰螺紋形成步驟的截面圖。 Fig. 6D is a cross-sectional view showing the step of forming the female thread after the step of forming the inner wall portion in the processing flow of the modification.
圖7是示意地顯示本發明第2實施形態之附有螺絲孔之金屬板之螺絲孔的圖，是在包含螺絲孔之中心軸線之截面觀看時的縱截面圖。 FIG. 7 is a view schematically showing a screw hole of a metal plate with a screw hole according to a second embodiment of the present invention, and is a longitudinal cross-sectional view when viewed in a cross section including a central axis of the screw hole.
圖8是示意地顯示本發明第3實施形態之附有螺絲孔之 金屬板之螺絲孔的圖，是在包含螺絲孔之中心軸線之截面觀看時的縱截面圖。 Figure 8 is a view schematically showing a screw hole with a third embodiment of the present invention; The figure of the screw hole of the metal plate is a longitudinal cross-sectional view when viewed in a cross section including the central axis of the screw hole.
圖9是示意地顯示本發明第4實施形態之附有螺絲孔之金屬板之螺絲孔的圖，是在包含螺絲孔之中心軸線之截面觀看時的縱截面圖。 FIG. 9 is a view schematically showing a screw hole of a metal plate with a screw hole according to a fourth embodiment of the present invention, and is a longitudinal cross-sectional view when viewed in a cross section including a central axis of the screw hole.
圖10是顯示評價螺絲孔之固結力之實驗的陽螺絲之轉角與緊固力矩之關係、及陽螺絲之轉角與緊固力矩之變化比例的關係之圖表。 Fig. 10 is a graph showing the relationship between the angle of the male screw and the tightening torque of the experiment for evaluating the fixing force of the screw hole, and the relationship between the rotation angle of the male screw and the tightening torque.
圖11是示意地顯示習知附有螺絲孔之金屬板之螺絲孔的截面圖。 Fig. 11 is a cross-sectional view schematically showing a screw hole of a conventional metal plate with a screw hole.
圖12A是說明習知附有螺絲孔之金屬板的螺絲孔之加工流程之一例的圖，是顯示該加工流程中之鑽孔步驟之截面圖。 Fig. 12A is a view showing an example of a processing flow of a screw hole of a conventional metal plate with a screw hole, and is a cross-sectional view showing a drilling step in the machining flow.
圖12B是顯示該加工流程之接續於鑽孔步驟之後之衝緣步驟的截面圖。 Figure 12B is a cross-sectional view showing the rinsing step of the processing flow following the drilling step.
以下，就本發明之附有螺絲孔之金屬板、具有此附有螺絲孔之金屬板的框體及附有螺絲孔之金屬板的製造方法之各實施形態，一面參照圖式，一面說明。此外，本發明附有螺絲孔之金屬板可適用於無電鍍之鋼板及電鍍鋼板任一者。 Hereinafter, each embodiment of the method for manufacturing a metal plate with a screw hole, a frame having the metal plate with the screw hole, and a metal plate with a screw hole according to the present invention will be described with reference to the drawings. Further, the metal plate with the screw holes of the present invention can be applied to any of the electroless plated steel and the plated steel plate.
第1實施形態 First embodiment
圖1是示意顯示本發明第1實施形態之附有螺絲孔之金 屬板10的螺絲孔之圖，為在包含螺絲孔之中心軸線CL之截面觀看時之縱截面圖。此外，在圖1中，為易理解結構，除了附有螺絲孔之金屬板10，陽螺絲50及具有貫穿孔51a之金屬板51也以假想線顯示。 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view schematically showing a gold with a screw hole according to a first embodiment of the present invention; The diagram of the screw hole of the sub-plate 10 is a longitudinal cross-sectional view when viewed in a cross section including the center axis CL of the screw hole. Further, in Fig. 1, in order to understand the structure, in addition to the metal plate 10 with the screw holes, the male screw 50 and the metal plate 51 having the through hole 51a are also shown by imaginary lines.
本實施形態之附有螺絲孔之金屬板10(以下亦有僅稱為金屬板10之情形)具有之螺絲孔12如圖1所示，具有外壁部12a及內壁部12b。外壁部12a形成從金屬板10之本體10a大約垂直地立起之圓筒狀。換言之，圓筒狀外壁部12a之為軸方向一端之根部部份12a1與本體10a相連，其中心軸線CL對本體10a之表面10x垂直。外壁部12a之沿著中心軸線CL之方向的另一端12a2與內壁部12b之根部部份12c相連。內壁部12b形成配置成與外壁部12a同軸之圓筒狀，從外壁部12a之上端(前述另一端12a2)翻折至內側而形成。又，於內壁部12b之內周面形成有陰螺紋12b1。 As shown in Fig. 1, the screw hole 12 of the metal plate 10 having the screw hole (hereinafter also referred to as the metal plate 10) of the present embodiment has an outer wall portion 12a and an inner wall portion 12b. The outer wall portion 12a is formed in a cylindrical shape that rises substantially perpendicularly from the body 10a of the metal plate 10. In other words, the root portion 12a1 of the cylindrical outer wall portion 12a at one end in the axial direction is connected to the body 10a, and its central axis CL is perpendicular to the surface 10x of the body 10a. The other end 12a2 of the outer wall portion 12a in the direction along the central axis CL is connected to the root portion 12c of the inner wall portion 12b. The inner wall portion 12b is formed in a cylindrical shape that is disposed coaxially with the outer wall portion 12a, and is formed by folding the upper end (the other end 12a2) of the outer wall portion 12a to the inner side. Further, a female screw 12b1 is formed on the inner circumferential surface of the inner wall portion 12b.
本實施形態之附有螺絲孔之金屬板10之螺絲孔12即使使板厚t薄時，亦可減低內壁部12b在根部部份12c之厚度減少，而可提高螺絲孔12之固結力並且可防止螺絲孔12之破損。關於在本實施形態之附有螺絲孔之金屬板10抑制內壁部12b之根部部份12c之厚度減少的理由後述。在此，「內壁部12b之根部部份12c」如在圖1以點鏈線包圍所示，是指與外壁部12a之前述另一端12a2相連之部份。 In the screw hole 12 of the metal plate 10 with the screw hole of the embodiment, even if the thickness t is thin, the thickness of the inner wall portion 12b at the root portion 12c can be reduced, and the fixing force of the screw hole 12 can be improved. Also, the screw hole 12 can be prevented from being damaged. The reason why the thickness of the root portion 12c of the inner wall portion 12b is reduced in the metal plate 10 having the screw hole in the present embodiment will be described later. Here, the "root portion 12c of the inner wall portion 12b" as indicated by a dotted line in Fig. 1 means a portion connected to the other end 12a2 of the outer wall portion 12a.
本實施形態之附有螺絲孔之金屬板10具有之螺絲孔12形成具有外壁部12a及將該外壁部12a翻折而成之內壁部12b之二重壁構造。藉此，於陽螺絲50之旋入作業或擰 鬆作業之際，即使內壁部12b因陽螺絲50之按壓而承受擴徑方向之力，亦可以外壁部12a從周圍支撐，故可阻止內壁部12b於擴徑方向過度變形，而防止固結力之降低及螺絲孔12之破損。 The screw hole 12 of the metal plate 10 with a screw hole according to the present embodiment has a double wall structure having an outer wall portion 12a and an inner wall portion 12b obtained by folding the outer wall portion 12a. Thereby, the screwing operation of the sun screw 50 or screwing In the loosening operation, even if the inner wall portion 12b receives the force in the diameter increasing direction by the pressing of the male screw 50, the outer wall portion 12a can be supported from the periphery, so that the inner wall portion 12b can be prevented from being excessively deformed in the diameter expanding direction to prevent solidification. The lowering of the clamping force and the breakage of the screw hole 12.
本實施形態之附有螺絲孔之金屬板10具有之螺絲孔12如在後述之製造方法所說明，於彎折加工時，成形為內壁部12b之外周面與外壁部12a之內周面接觸，藉彈回，成形之內壁部12b於縮徑方向稍微變形。是故，在陽螺絲50未螺合於螺絲孔12之陰螺紋12b1之狀態下，內壁部12b之外周面與外壁部12a之內周面拉開間隔，而在陽螺絲50螺合於螺絲孔12之陰螺紋12b1之狀態下，則形成為內壁部12b之外周面至少一部份抵接外壁部12a之內周面的結構。關於此結構，使用圖2及圖3，進一步詳細地說明。 The screw hole 12 of the metal plate 10 having the screw hole according to the present embodiment is described as a manufacturing method to be described later, and is formed into a contact between the outer peripheral surface of the inner wall portion 12b and the inner peripheral surface of the outer wall portion 12a during the bending process. By the bounce, the formed inner wall portion 12b is slightly deformed in the diameter reducing direction. Therefore, in a state where the male screw 50 is not screwed to the female screw 12b1 of the screw hole 12, the outer peripheral surface of the inner wall portion 12b is spaced apart from the inner peripheral surface of the outer wall portion 12a, and the male screw 50 is screwed to the screw. In the state of the female screw 12b1 of the hole 12, at least a part of the outer peripheral surface of the inner wall portion 12b is formed to abut against the inner peripheral surface of the outer wall portion 12a. This structure will be described in further detail with reference to FIGS. 2 and 3.
首先，如圖2所示，在將陽螺絲50旋入螺絲孔12前之狀態下，藉以彎折加工形成螺絲孔12後產生之彈回，內壁部12b之前端12b3與外壁部12a之根部部份12a1稍微拉開間隔。是故，於內壁部12b之外周面與外壁部12a之內周面之間形成有些微之間隙。 First, as shown in FIG. 2, in the state before the male screw 50 is screwed into the screw hole 12, the springback generated after the screw hole 12 is formed by the bending process, the front end portion 12b3 of the inner wall portion 12b and the root portion of the outer wall portion 12a Part 12a1 is slightly spaced apart. Therefore, a slight gap is formed between the outer peripheral surface of the inner wall portion 12b and the inner peripheral surface of the outer wall portion 12a.
接著，如圖3所示，在將陽螺絲50旋入螺絲孔12之狀態下，承受了陽螺絲50之按壓力之內壁部12b按彈回量，於擴徑方向彈性變形，結果，內壁部12b之外周面抵接外壁部12a之內周面，前述間隙消失。因此，如前述，以外壁部12a阻止限制內壁部12b之變形，除此之外，因彈回，內壁部12b發揮可回復至圖2之狀態之復原力。由於藉此復原力，如圖 3之箭號X所示，內壁部12b被賦予朝陽螺絲50之勢能，故陰螺紋12b1與陽螺絲50之間持續密合。是故，可更提高螺絲孔12及陽螺絲50之間之固結力而可防止陽螺絲50之鬆脫。 Next, as shown in FIG. 3, in a state where the male screw 50 is screwed into the screw hole 12, the inner wall portion 12b which has withstood the pressing force of the male screw 50 is elastically deformed in the diameter-expanding direction, and as a result, The outer peripheral surface of the wall portion 12b abuts against the inner peripheral surface of the outer wall portion 12a, and the gap disappears. Therefore, as described above, the outer wall portion 12a prevents the deformation of the inner wall portion 12b from being restricted, and in addition to this, the inner wall portion 12b exerts a restoring force that can return to the state of Fig. 2 by the rebound. Because of this resilience, as shown As indicated by the arrow X of the arrow 3, the inner wall portion 12b is given the potential energy of the sun-facing screw 50, so that the female screw 12b1 and the male screw 50 are kept in close contact with each other. Therefore, the fixing force between the screw hole 12 and the male screw 50 can be further increased to prevent the male screw 50 from coming loose.
如以上所說明，本實施形態之附有螺絲孔之金屬板10之螺絲孔12具有從金屬板10之其中一面10x垂直立起之圓筒狀外壁部12a、從外壁部12a之上端緣翻折至外壁部12a之內側之圓筒狀內壁部12b，於內壁部12b之內周面形成有陰螺紋12b1。 As described above, the screw hole 12 of the metal plate 10 with the screw hole of the present embodiment has the cylindrical outer wall portion 12a which is vertically raised from one side 10x of the metal plate 10, and is folded from the upper edge of the outer wall portion 12a. The cylindrical inner wall portion 12b on the inner side of the outer wall portion 12a is formed with a female screw 12b1 on the inner circumferential surface of the inner wall portion 12b.
根據此結構，即使使具有螺絲孔之金屬板10之板厚t薄，螺絲孔12與陽螺絲50之固結力優異，並且可防止螺絲孔12之破損。而且由於螺絲孔12為以成形加工形成之一體物，故不需焊接加工等費事之作業，加工成本亦不致大幅增加。 According to this configuration, even if the thickness t of the metal plate 10 having the screw holes is made thin, the fixing force of the screw holes 12 and the male screws 50 is excellent, and the breakage of the screw holes 12 can be prevented. Further, since the screw hole 12 is formed into a body by a forming process, it is not necessary to perform a complicated operation such as welding, and the processing cost is not greatly increased.
又，在本實施形態之附有螺絲孔之金屬板10中，內壁部12b之前端12b3與金屬板之另一面10y在同一平面。 Further, in the metal plate 10 with the screw hole in the present embodiment, the front end 12b3 of the inner wall portion 12b and the other surface 10y of the metal plate are flush with each other.
根據此結構，在作為此附有螺絲孔之金屬板10之安裝面之前述另一面10y整面，要求無凹凸之平面性時，可將螺絲孔12之形成之凹凸的程度固定在最小限度，並且可確保陰螺紋12b1之長度尺寸為最大。是故，可獲得兼具美觀與固結力之附有螺絲孔之金屬板10。 According to this configuration, when the flat surface of the other surface 10y of the mounting surface of the metal plate 10 to which the screw hole is attached is required to have no unevenness, the degree of unevenness of the formation of the screw hole 12 can be minimized. And it is ensured that the length dimension of the female thread 12b1 is the largest. Therefore, it is possible to obtain a metal plate 10 with screw holes and a combination of aesthetic and consolidation forces.
接著，就本實施形態之框體，使用圖1及圖4，於以下說明。 Next, the casing of this embodiment will be described below using Figs. 1 and 4 .
如圖4所示，本實施形態之框體70具有前述附有螺絲孔之金屬板10、具有貫穿孔51a之構件(金屬板)51、在***至 貫穿孔51a之狀態下旋入螺絲孔12而結合附有螺絲孔之金屬板10及構件51間之陽螺絲50。此外，圖4為分解立體圖，在藉將陽螺絲50旋入螺絲孔12而接合附有螺絲孔之金屬板10與構件51之狀態的螺絲孔12之主要部份截面圖如圖1所示。 As shown in FIG. 4, the frame body 70 of the present embodiment has the above-mentioned metal plate 10 with a screw hole, and a member (metal plate) 51 having a through hole 51a, which is inserted into The screw hole 12 is screwed into the through hole 51a, and the male screw 50 between the metal plate 10 and the member 51 to which the screw hole is attached is joined. 4 is an exploded perspective view showing a principal part of the screw hole 12 in a state in which the screw plate 12 is screwed into the screw hole 12 and the metal plate 10 with the screw hole and the member 51 are joined, as shown in FIG.
根據本實施形態之框體70，由於附有螺絲孔之金屬板10具有上述構造，故螺絲孔12與陽螺絲50之固結力優異，並且亦可防止螺絲孔12之破損。又，亦為可防止旋入之陽螺絲50鬆脫之框體70。此外，可例示空氣調節機之室內機或室外機、還有變電設備之框體等作為框體70。 According to the frame body 70 of the present embodiment, since the metal plate 10 having the screw holes has the above-described structure, the screw holes 12 and the male screws 50 have excellent fixing force, and the screw holes 12 can be prevented from being damaged. Further, it is also a frame 70 that can prevent the male screw 50 that is screwed in from coming loose. Further, as the casing 70, an indoor unit or an outdoor unit of the air conditioner, a casing of the power conversion apparatus, and the like can be exemplified.
此外，在圖1中，將為具有貫穿孔51a之金屬板之構件51安裝於內壁部12b之前端12b3側，但不僅限於此結構，亦可採用將構件51安裝於內壁部12b之根部部份12c側之結構。即，在圖1中，亦可使附有螺絲孔之金屬板10與構件51之上下配置關係相反。此外，「內壁部12b之前端12b3」是指在沿著中心軸線CL之方向，位於與前述根部部份12c對向之位置的端部。又，構件51不僅限於金屬板，亦包含具有貫穿孔之附屬零件等。 Further, in Fig. 1, the member 51 which is a metal plate having the through hole 51a is attached to the front end 12b3 side of the inner wall portion 12b, but the present invention is not limited to this configuration, and the member 51 may be attached to the root of the inner wall portion 12b. Part 12c side structure. That is, in Fig. 1, the metal plate 10 with the screw holes may be opposed to the upper and lower surfaces of the member 51. In addition, the "inner end portion 12b front end 12b3" refers to an end portion located at a position facing the root portion 12c in the direction along the center axis line CL. Further, the member 51 is not limited to a metal plate, and includes an attachment member having a through hole or the like.
接著，就本實施形態之附有螺絲孔之金屬板10的製造方法作說明。在本實施形態中，於外壁部成形步驟後，進行鑽孔步驟，亦可採用於鑽孔步驟後進行外壁部成形步驟之變形例(後述)。 Next, a method of manufacturing the metal plate 10 with screw holes according to the present embodiment will be described. In the present embodiment, after the outer wall portion forming step, the drilling step is performed, and a modification (described later) of the outer wall portion forming step after the drilling step may be employed.
圖5A~圖5D是顯示本實施形態之金屬板之製造方法之加工流程的示意圖，圖5A顯示外壁部成形步驟，圖 5B顯示鑽孔步驟，圖5C顯示內壁部成形步驟，圖5D顯示陰螺紋形成步驟。 5A to 5D are schematic views showing a processing flow of a method of manufacturing a metal plate according to the embodiment, and FIG. 5A is a view showing a step of forming an outer wall portion. 5B shows the drilling step, FIG. 5C shows the inner wall forming step, and FIG. 5D shows the female thread forming step.
首先，在外壁部成形步驟中，於為加工對象之金屬板20(原材料)成形外壁部20a、相連於此外壁部20a之圓板部20b。圓筒狀外壁部20a其中心軸線CL方向之一端與金屬板20之本體相連，從金屬板20立起成其中心軸線CL與金屬板20之表面垂直。外壁部20a其中心軸線CL方向之另一端之內側與圓板部20b相連。 First, in the outer wall portion forming step, the outer wall portion 20a and the disc portion 20b connected to the outer wall portion 20a are formed in the metal plate 20 (raw material) to be processed. The cylindrical outer wall portion 20a is connected to the body of the metal plate 20 at one end of the central axis CL direction, and rises from the metal plate 20 such that its central axis CL is perpendicular to the surface of the metal plate 20. The inner side of the other end of the outer wall portion 20a in the direction of the central axis CL is connected to the disc portion 20b.
此種形狀之外壁部20a及圓板部20b可藉使用衝頭及衝模之撐壓加工或引伸加工成形。為撐壓加工時，如圖5A所示，除了撐壓用衝頭35及撐壓用衝模36，還使用坯料夾36a。在以坯料夾36a及衝模36將金屬板20從其正面及背面挾持之狀態下，使衝頭35、衝模36及坯料夾36a相對地移動，將金屬板20之一部份與衝頭35一同推入衝模36內。藉此，圓筒狀外壁部20a及圓板部20b成形於金屬板20。 The outer wall portion 20a and the disk portion 20b of such a shape can be formed by press working or drawing processing using a punch and a die. In the press working, as shown in Fig. 5A, a blank holder 36a is used in addition to the press punch 35 and the press punch 36. In a state in which the metal plate 20 is held by the blank holder 36a and the die 36 from the front surface and the back surface thereof, the punch 35, the die 36, and the blank holder 36a are relatively moved, and one portion of the metal plate 20 is combined with the punch 35. Push into the die 36. Thereby, the cylindrical outer wall portion 20a and the disc portion 20b are formed on the metal plate 20.
在接續之鑽孔步驟中，於圓板部20b之中心鑽鑿預鑽孔。即，如圖5B所示，藉使用鑽孔用衝頭31及鑽孔用衝模32來進行剪切加工之鑽孔，而於圓板部20b鑽鑿預鑽孔20b1。鑽孔亦可藉使用鑽孔機之切削加工或雷射切割機之鑽孔加工來進行。 In the subsequent drilling step, a pre-drilled hole is drilled in the center of the circular plate portion 20b. That is, as shown in FIG. 5B, the drilling hole 31 and the drilling die 32 are used to perform the drilling of the shearing process, and the pre-drilled hole 20b1 is drilled in the disk portion 20b. Drilling can also be carried out by using a drilling machine or a laser cutting machine.
在接續之內壁部成形步驟中，藉彎折鑽鑿有預鑽孔20b1之圓板部20b，成形翻折至外壁部20a(12a)之內側而成之內壁部12b。此圓板部20b之彎折可以所謂之擴孔加工進行。 In the subsequent inner wall portion forming step, the disc portion 20b of the pre-drilled hole 20b1 is drilled and bent, and the inner wall portion 12b which is folded over to the inner side of the outer wall portion 20a (12a) is formed. The bending of the disc portion 20b can be performed by a so-called reaming process.
即，在擴孔加工中，可使用如圖5C所示之擴孔用衝頭37、擴孔用衝模38及坯料夾39來進行。即，在以衝模38及坯料夾39將金屬板20從其正面及背面挾持之狀態下，使衝頭37、衝模38及坯料夾39相對地移動。此時，將衝頭37推抵至預鑽孔20b1內。如此進行，當將金屬板20之圓板部20b與衝頭37一同推入至外壁部20a之內側時，圓板部20b一面於衝頭37之推入方向伸長，一面亦於徑方向擴大，結果，形成圓筒狀且從外壁部12a(20a)翻折至內側而成之內壁部12b(20b)。此時，內壁部12b之外周面形成為接觸外壁部12a之內周面，而由於內壁部12b因彈回而於縮徑方向稍微變形，故產生如圖2所示之間隙。 That is, in the hole expanding process, the punching punch 37, the punching die 38, and the blank clip 39 shown in Fig. 5C can be used. That is, the punch 37, the die 38, and the blank holder 39 are relatively moved while the metal plate 20 is held by the die 38 and the blank holder 39 from the front surface and the back surface thereof. At this time, the punch 37 is pushed into the pre-drilled hole 20b1. In this manner, when the disc portion 20b of the metal plate 20 is pushed into the inner side of the outer wall portion 20a together with the punch 37, the disc portion 20b is elongated in the pushing direction of the punch 37, and the surface is also enlarged in the radial direction. As a result, the inner wall portion 12b (20b) having a cylindrical shape and folded from the outer wall portion 12a (20a) to the inner side is formed. At this time, the outer peripheral surface of the inner wall portion 12b is formed to contact the inner peripheral surface of the outer wall portion 12a, and since the inner wall portion 12b is slightly deformed in the diameter reducing direction by the rebound, a gap as shown in FIG. 2 is generated.
在接續之螺紋切削步驟中，於已形成之內壁部12b之內周面加工陰螺紋12b1。陰螺紋12b1之加工方法無特別限制，如圖5D所示，可以螺絲攻40加工陰螺紋12b1。如以上說明，根據本實施形態之製造方法，可將附有螺絲孔之金屬板10、即具有外壁部12a及翻折該外壁部12a之一部份之內壁部12b的螺絲孔12加工於金屬板20。 In the subsequent thread cutting step, the female thread 12b1 is machined on the inner circumferential surface of the formed inner wall portion 12b. The processing method of the female thread 12b1 is not particularly limited, and as shown in FIG. 5D, the female thread 12b1 can be machined by the tapping 40. As described above, according to the manufacturing method of the present embodiment, the metal plate 10 having the screw hole, that is, the screw hole 12 having the outer wall portion 12a and the inner wall portion 12b of a portion of the outer wall portion 12a can be processed. Metal plate 20.
根據本實施形態之製造方法，相較於如使用圖11所說明之使用衝緣加工形成螺絲孔之習知方法，可減低螺絲孔之根部部份之厚度減少。即，在習知之製造方法中，如圖12B所示，於衝緣加工之際，在以衝模534及坯料夾539挾持金屬板520之狀態下，將金屬板520之預鑽孔周圍部份與衝頭533一同推入衝模534之凹部內而使其變形，藉此，成形縱壁部511。此時，因金屬板520中變形之預鑽孔周圍 之根部部份511a與以衝模534及坯料夾539所挾持之部份接近，故於縱壁部511之根部產生非常大之拉伸應力，結果，促進厚度減少。 According to the manufacturing method of the present embodiment, the thickness reduction of the root portion of the screw hole can be reduced as compared with the conventional method of forming the screw hole by the edge processing as described with reference to Fig. 11 . That is, in the conventional manufacturing method, as shown in FIG. 12B, in the state of the edge processing, in the state where the metal plate 520 is held by the die 534 and the blank holder 539, the portion around the pre-drilled hole of the metal plate 520 is The punch 533 is pushed into the recess of the die 534 together and deformed, whereby the vertical wall portion 511 is formed. At this time, due to the deformation of the metal plate 520 around the pre-drilled hole The root portion 511a is close to the portion held by the die 534 and the blank holder 539, so that a very large tensile stress is generated at the root of the vertical wall portion 511, and as a result, the thickness is reduced.
另一方面，如圖5C所示，在內壁部成形步驟在以衝模38及坯料夾39挾持金屬板20之狀態下，將圓板部20b與衝頭37一同推入外壁部20a(12a)之內側而使其變形，藉此，成形內壁部12b。此時，金屬板20中，變形之圓板部20b與挾持在衝頭38及坯料夾39間之部份之間存在外壁部12a。藉此，可紓緩產生於內壁部12b之根部部份12c之拉伸應力，結果，可比習知前述根部部份511a(參照圖11)減低根部部份12c之厚度減少量。 On the other hand, as shown in Fig. 5C, in the inner wall portion forming step, the disk portion 20b is pushed together with the punch 37 into the outer wall portion 20a (12a) while the metal plate 20 is held by the die 38 and the blank holder 39. The inside is deformed, whereby the inner wall portion 12b is formed. At this time, in the metal plate 20, the deformed disk portion 20b and the portion between the punch 38 and the blank holder 39 are present with the outer wall portion 12a. Thereby, the tensile stress generated in the root portion 12c of the inner wall portion 12b can be relieved, and as a result, the thickness reduction of the root portion 12c can be reduced as compared with the conventional root portion 511a (see Fig. 11).
因而，根據本實施形態之製造方法，可提高所形成之螺絲孔12與陽螺絲50之固結力，並且亦可防止螺絲孔12之破損。又，由於螺絲孔12為外壁部12a與內壁部12b之二重壁構造，故可阻止內壁部12b於擴徑方向變形，可防止變形引起之固結力之降低及螺絲孔12之破損。再者，由於彎折圓板部20b而形成內壁部12b，故當陽螺絲50旋入螺絲孔12時，產生內壁部12b之彈回所致之復原力，內壁部12b密合於陽螺絲50。藉此，螺絲孔12之固結力可更提高，並且可更確實地防止旋入之陽螺絲50鬆脫。 Therefore, according to the manufacturing method of the present embodiment, the fixing force of the formed screw hole 12 and the male screw 50 can be improved, and the screw hole 12 can be prevented from being damaged. Further, since the screw hole 12 has a double wall structure of the outer wall portion 12a and the inner wall portion 12b, deformation of the inner wall portion 12b in the diameter expansion direction can be prevented, and the reduction of the fixing force due to the deformation and the breakage of the screw hole 12 can be prevented. . Further, since the inner wall portion 12b is formed by bending the disc portion 20b, when the male screw 50 is screwed into the screw hole 12, the restoring force due to the springback of the inner wall portion 12b occurs, and the inner wall portion 12b is adhered to Male screw 50. Thereby, the fixing force of the screw hole 12 can be further improved, and the screwing of the male screw 50 can be more reliably prevented from coming loose.
本實施形態由於可以外壁部成形、鑽孔、內壁部成形及陰螺紋形成4個步驟形成螺絲孔12，故相較於前述專利文獻1所提出之習知螺絲孔，可減低加工工數之增加。又上述4個步驟不要求高加工精確度。因而，根據本實施形態 之製造方法，相較於前述專利文獻1提出之螺絲孔，可減低加工成本之上升。 In the present embodiment, since the screw holes 12 can be formed in four steps of forming the outer wall portion, drilling, forming the inner wall portion, and forming the female thread, the number of the machining holes can be reduced as compared with the conventional screw hole proposed in the above Patent Document 1. increase. Again, the above four steps do not require high processing accuracy. Thus, according to this embodiment The manufacturing method can reduce the increase in processing cost as compared with the screw hole proposed in the above Patent Document 1.
作為本發明之附有螺絲孔之金屬板的製造方法，上述說明以外之形態亦可採用如圖6A~圖6D所示之變形例。 As a method of manufacturing the metal plate with the screw hole of the present invention, a modification other than the above description may be employed as shown in FIGS. 6A to 6D.
圖6A顯示鑽孔步驟，圖6B顯示外壁部成形步驟，圖6C顯示內壁部成形步驟，圖6D顯示陰螺紋形成步驟。在本變形例中，在形成螺絲孔12時，首先，在鑽孔步驟，鑽鑿預鑽孔。即，如圖6A所示，使用鑽孔用衝頭31及鑽孔用衝模32，進行剪切加工之鑽孔，而於加工對象之金屬板20鑽鑿預鑽孔20b1。鑽孔亦可以使用鑽孔機之切削加工或雷射切割機之鑽孔加工進行。 Fig. 6A shows a drilling step, Fig. 6B shows an outer wall portion forming step, Fig. 6C shows an inner wall portion forming step, and Fig. 6D shows a female thread forming step. In the present modification, when the screw hole 12 is formed, first, in the drilling step, the pre-drilling hole is drilled. That is, as shown in FIG. 6A, the drilling punch 31 and the drilling die 32 are used to perform the drilling of the shearing process, and the pre-drilled hole 20b1 is drilled in the metal plate 20 to be processed. Drilling can also be done using a drilling machine or a laser cutting machine.
在接續之外壁部成形步驟，如圖6B所示，於金屬板20成形圓筒狀外壁部20a及相連於此外壁部20a之圓板部20b。圓筒狀外壁部20a其軸方向之一端之根部部份與金屬板20相連，且從金屬板20立起成其中心軸線CL與金屬板20之表面垂直。又，外壁部20a沿著其中心軸線CL之方向的另一端之內側與圓板部20b相連。在本變形例中，將此種外壁部20a與圓板部20b成形為預鑽孔20b1與圓筒狀外壁部20a同心。 In the subsequent outer wall forming step, as shown in FIG. 6B, the cylindrical outer wall portion 20a and the disc portion 20b connected to the outer wall portion 20a are formed in the metal plate 20. The root portion of one end of the cylindrical outer wall portion 20a in the axial direction is connected to the metal plate 20, and rises from the metal plate 20 such that its central axis CL is perpendicular to the surface of the metal plate 20. Further, the inner side of the other end of the outer wall portion 20a along the direction of the central axis CL thereof is connected to the disc portion 20b. In the present modification, the outer wall portion 20a and the disc portion 20b are formed such that the pre-drilled hole 20b1 is concentric with the cylindrical outer wall portion 20a.
外壁部20a及圓板部20b之成形可藉使用衝頭及衝模之撐壓加工或引伸加工成形。為撐壓加工時，除了如圖6B所示之撐壓用衝頭35及撐壓用衝模36，還使用坯料夾36a。將金屬板20配置成其預鑽孔20b1之中心與衝模36之凹 部之中心一致，以衝模36及坯料夾36a挾持金屬板20。在此狀態下，使衝頭35、衝模36及坯料夾36a相對地移動，將金屬板20之一部份與衝頭35一同推入衝模36內。藉此，於金屬板20成形圓筒狀外壁部20a及圓板部20b。此時，預鑽孔20b1變形而擴徑。 The formation of the outer wall portion 20a and the circular plate portion 20b can be formed by press working or drawing processing using a punch and a die. In the press working, a blank holder 36a is used in addition to the press punch 35 and the press punch 36 as shown in Fig. 6B. The metal plate 20 is configured such that the center of the pre-drilled hole 20b1 and the concave portion of the die 36 The center of the part is identical, and the metal plate 20 is held by the die 36 and the blank holder 36a. In this state, the punch 35, the die 36, and the blank holder 36a are relatively moved, and a part of the metal plate 20 is pushed into the die 36 together with the punch 35. Thereby, the cylindrical outer wall portion 20a and the disc portion 20b are formed in the metal plate 20. At this time, the pre-drill hole 20b1 is deformed to expand the diameter.
在接續之內壁部成形步驟中，如圖6C所示，藉彎折已成形之圓板部20b，而成形從外壁部12a翻折至內側而成之內壁部12b。 In the subsequent inner wall portion forming step, as shown in Fig. 6C, the formed circular plate portion 20b is bent, and the inner wall portion 12b which is folded from the outer wall portion 12a to the inner side is formed.
在接續之陰螺紋形成步驟中，如圖6D所示，於內壁部12b之內周面加工陰螺紋12b1。圓板部20b之彎折與前述實施形態同樣地，以擴孔加工進行。又，陰螺紋12b1之加工亦與前述實施形態同樣地，無特別限制，舉例言之，可以螺絲攻40加工。 In the subsequent female thread forming step, as shown in Fig. 6D, the female thread 12b1 is machined on the inner peripheral surface of the inner wall portion 12b. The bending of the disk portion 20b is performed by a hole expanding process in the same manner as in the above embodiment. Further, the processing of the female thread 12b1 is not particularly limited as in the above embodiment, and for example, it can be processed by the tapping 40.
亦可以上述變形例之製造方法，於金屬板20形成具有外壁部12a及內壁部12b之螺絲孔12。又，在本變形例中，在內壁部成形步驟彎折圓板部20b之際，於金屬板20中變形之圓板部20b與以衝模38及坯料夾39挾持之部份之間亦存在外壁部12a。因此，可減低內壁部12b之根部部份12c之厚度減少，結果，可提高螺絲孔12之固結力，並且可防止螺絲孔12之破損。 Further, in the manufacturing method of the above modification, the screw hole 12 having the outer wall portion 12a and the inner wall portion 12b may be formed in the metal plate 20. Further, in the present modification, when the inner wall portion forming step bends the disc portion 20b, the disc portion 20b deformed in the metal plate 20 and the portion held by the die 38 and the blank holder 39 are also present. The outer wall portion 12a. Therefore, the thickness of the root portion 12c of the inner wall portion 12b can be reduced, and as a result, the fixing force of the screw hole 12 can be improved, and the breakage of the screw hole 12 can be prevented.
又，在本變形例中，亦與上述實施形態同樣地，由於獲得之螺絲孔12為具有外壁部12a及內壁部12b之二重壁構造，故可阻止內壁部12b於擴徑方向過度變形，而可防止因其引起之固結力之降低及螺絲孔12之破損。再者，當 將陽螺絲50旋入螺絲孔12時，內壁部12b因彈回而密合於陽螺絲50。藉此，螺絲孔12之固結力更提高，並且可防止旋入之陽螺絲50鬆脫。 Further, in the present modification, as in the above-described embodiment, since the obtained screw hole 12 has a double wall structure having the outer wall portion 12a and the inner wall portion 12b, the inner wall portion 12b can be prevented from being excessively expanded in the diameter expansion direction. The deformation is prevented, and the reduction of the fixing force caused by the same and the breakage of the screw hole 12 are prevented. Again, when When the male screw 50 is screwed into the screw hole 12, the inner wall portion 12b is brought into close contact with the male screw 50 by the springback. Thereby, the fixing force of the screw hole 12 is further improved, and the screwing of the male screw 50 can be prevented from coming loose.
由於本變形例可以鑽孔、外壁部成形、內壁部成形及陰螺紋形成4個步驟塑造螺絲孔12，故相較於前述專利文獻1提出之習知螺絲孔，可抑制加工數之增加。又，不對上述4個步驟要求高加工精確度。因而，本變形例相較於前述專利文獻1提出之螺絲孔，可減低加工成本之上升。 In the present modification, the screw holes 12 can be formed by drilling, the outer wall portion forming, the inner wall portion forming, and the female screw forming in four steps. Therefore, compared with the conventional screw hole proposed in the above Patent Document 1, the increase in the number of machining can be suppressed. Also, high processing accuracy is not required for the above four steps. Therefore, the present modification can reduce the increase in processing cost as compared with the screw hole proposed in the above Patent Document 1.
本變形例亦可以相同之裝置進行外壁部成形及內壁部成形之步驟，此時，可更抑制加工數之增加。具體言之，在圖6B中，將圖6C所示之擴孔用衝頭37(省略圖示)配置成與撐壓用衝頭35對向。藉此，以撐壓用衝頭35及衝壓用衝模36成形外壁部20a(12a)及圓板部20b後，立即以擴孔用衝頭37成形內壁部12b。 In the present modification, the outer wall portion forming and the inner wall portion forming step can be performed by the same apparatus. In this case, the increase in the number of processing can be further suppressed. Specifically, in FIG. 6B, the reaming punch 37 (not shown) shown in FIG. 6C is disposed to face the pressing punch 35. After the outer wall portion 20a (12a) and the disk portion 20b are formed by the pressing punch 35 and the punching die 36, the inner wall portion 12b is formed by the reaming punch 37 immediately.
以上說明之第1實施形態及其變形例在外壁部成形步驟(參照圖5A、圖6B)，成形外壁部20a(12a)及圓板部20b之際，皆宜使用衝模36及肩部之半徑R(mm)滿足下述式(1)之衝頭35。又，在鑽孔步驟(參照圖5B、圖6A)，宜鑽鑿預鑽孔為在之後之內壁部成形步驟的內壁部成形前之預鑽孔之半徑r(mm)滿足下述算式(2)。此外，t顯示金屬板20之板厚(mm)。 In the first embodiment and its modification described above, in the outer wall portion forming step (see Figs. 5A and 6B), it is preferable to use the radius of the die 36 and the shoulder when forming the outer wall portion 20a (12a) and the disk portion 20b. R (mm) satisfies the punch 35 of the following formula (1). Further, in the drilling step (refer to FIG. 5B, FIG. 6A), it is preferable that the pre-drilled hole is a radius r (mm) of the pre-drilled hole before the forming of the inner wall portion of the subsequent inner wall portion forming step satisfies the following formula (2). Further, t shows the plate thickness (mm) of the metal plate 20.
0.5≦R/t≦1.0 算式(1) 0.5≦R/t≦1.0 Equation (1)
0.5≦r/t≦1.2 算式(2) 0.5≦r/t≦1.2 Equation (2)
在此，衝頭35之「肩部之半徑」是指連結與成形 於金屬板20之外壁部20a(12a)抵接之衝頭35之外周面及與成形之圓板部20b抵接之衝頭35之前端面之R部的半徑(參照圖5A及圖6B)。又，「內壁部成形步驟之內壁部成形前之預鑽孔之半徑」具體言之，在上述實施形態，相當於在圖5B所示之鑽孔步驟所鑽鑿之預鑽孔20b1之半徑，在上述變形例，則相當於在鑽孔步驟後之圖6B所示之外壁部成形步驟於擴徑方向變形之狀態的預鑽孔20b1之半徑。 Here, the "radius of the shoulder" of the punch 35 means joining and forming The outer peripheral surface of the punch 35 where the outer wall portion 20a (12a) of the metal plate 20 abuts and the radius of the R portion of the front end surface of the punch 35 abutting on the formed disk portion 20b (see FIGS. 5A and 6B). Further, "the radius of the pre-drilled hole before the inner wall portion of the inner wall portion forming step is formed", specifically, in the above embodiment, corresponds to the pre-drilled hole 20b1 drilled in the drilling step shown in Fig. 5B. The radius, in the above-described modification, corresponds to the radius of the pre-drill hole 20b1 in the state in which the outer wall portion forming step is deformed in the diameter expansion direction as shown in Fig. 6B after the drilling step.
當在外壁部成形步驟，衝頭35之肩部之半徑R(mm)小於0.5×t(mm)時，衝頭35陷入連結外壁部20a(12a)與圓板部20b之R部(彎曲部份)，有因此部份厚度減少臻至斷裂之現象而造成製品不良之情形，製造成品率降低。另一方面，當衝頭35之肩部之半徑R(mm)大於1.0×t(mm)時，在內壁部成形步驟，在連結外壁部20a(12a)與圓板部20b之R部(彎曲部份)無法充分彎折，外壁部20a(12a)往內壁部12b側塌下，結果，仍有製品不良之虞。 When the radius R (mm) of the shoulder portion of the punch 35 is less than 0.5 × t (mm) in the outer wall portion forming step, the punch 35 is caught in the R portion (curved portion) that connects the outer wall portion 20a (12a) and the disc portion 20b. In part, there is a case where the thickness is reduced to the phenomenon of breakage, resulting in a defective product, and the manufacturing yield is lowered. On the other hand, when the radius R (mm) of the shoulder portion of the punch 35 is larger than 1.0 × t (mm), the inner wall portion forming step connects the outer wall portion 20a (12a) and the R portion of the disc portion 20b ( The bent portion is not sufficiently bent, and the outer wall portion 20a (12a) is collapsed toward the inner wall portion 12b side, and as a result, there is still a defect in the product.
又，當預鑽孔20b1之半徑r(mm)小於0.5×t(mm)時，在內壁部成形步驟，彎折圓板部20b之際，使預鑽孔部20b1之周圍部份變形之力過大。藉此，連結外壁部20a(12a)與金屬板20之本體之R部(彎曲部份)變形，結果，有無法成形內壁部12b及外壁部20a(12a)而造成製品不良之情形，製造成品率降低。另一方面，當預鑽孔之半徑r(mm)大於1.2×t(mm)時，以內壁部成形步驟成形之內壁部12b其高度小，螺牙之數少。因此，有無法獲得與陽螺絲50充分固結之力之虞。 Further, when the radius r (mm) of the pre-drilled hole 20b1 is less than 0.5 × t (mm), the inner wall portion forming step deforms the peripheral portion of the pre-drilled portion 20b1 when the circular plate portion 20b is bent The power is too big. Thereby, the R portion (curved portion) connecting the outer wall portion 20a (12a) and the main body of the metal plate 20 is deformed, and as a result, the inner wall portion 12b and the outer wall portion 20a (12a) cannot be formed, and the product is defective. The yield is reduced. On the other hand, when the radius r (mm) of the pre-drilled hole is larger than 1.2 × t (mm), the inner wall portion 12b formed by the inner wall portion forming step has a small height and a small number of threads. Therefore, there is a possibility that the force of solidification with the male screw 50 cannot be obtained.
在本發明之附有螺絲孔之金屬板、具有該附有螺絲孔之金屬板的框體、及附有螺絲孔之金屬板的製造方法中，關於金屬板自身之材質無特別限制。 In the method of manufacturing a metal plate with a screw hole, a frame having the metal plate with the screw hole, and a metal plate with a screw hole, the material of the metal plate itself is not particularly limited.
本發明之附有螺絲孔之金屬板的製造方法宜在內壁部成形步驟，使用如圖5C及圖6C所示之前端設有錐部之衝頭37。其理由是相較於在習知技術之說明中，圖12B所示之筆直形衝緣用衝頭533，使用設有隨著接近前端外徑越小之錐部之衝頭37時，易促進在連結外壁部20a(12a)與圓板部20b之R部(彎曲部)之彎曲變形，而可抑制外壁部20a(12a)之塌下。 The method for producing a metal plate with a screw hole according to the present invention is preferably a step of forming the inner wall portion, and a punch 37 having a tapered portion at the front end as shown in Figs. 5C and 6C is used. The reason for this is that, in the description of the prior art, the straight punching punch 533 shown in Fig. 12B is easily promoted by using the punch 37 having a tapered portion which is smaller as the outer diameter of the front end is smaller. The R portion (bending portion) connecting the outer wall portion 20a (12a) and the disc portion 20b is bent and deformed, and the collapse of the outer wall portion 20a (12a) can be suppressed.
第2實施形態 Second embodiment
以下，就本發明第2實施形態，使用圖7來說明。說明時，以與上述第1實施形態之不同點為中心來說明，關於其他則與上述第1實施形態相同而省略說明。 Hereinafter, a second embodiment of the present invention will be described with reference to Fig. 7 . In the description, the differences from the first embodiment will be mainly described, and the other points are the same as those in the first embodiment, and the description thereof will be omitted.
圖7是示意地顯示本實施形態之附有螺絲孔之金屬板100之螺絲孔12的圖，是在包含螺絲孔12之中心軸線CL之截面觀看時之相當於圖3的縱截面圖。 Fig. 7 is a view schematically showing a screw hole 12 of a metal plate 100 with a screw hole according to the present embodiment, and is a longitudinal sectional view corresponding to Fig. 3 when viewed in a cross section including a central axis CL of the screw hole 12.
本實施形態之附有螺絲孔之金屬板100其內壁部12b之長度尺寸L1長於上述第1實施形態。結果，內壁部12b之前端12b3較金屬板之前述另一面10y突出。 The metal plate 100 with a screw hole according to the present embodiment has a length L1 of the inner wall portion 12b longer than that of the first embodiment. As a result, the front end 12b3 of the inner wall portion 12b protrudes from the aforementioned other surface 10y of the metal plate.
根據此結構，於例如重疊附有螺絲孔之金屬板100與另一金屬板51而進行對位之際，如圖7所示，藉將內壁部12b之突出部份嵌入另一金屬板51之貫穿孔51a內，可易進行對位。 According to this configuration, for example, when the metal plate 100 with the screw holes is overlapped and the other metal plate 51 is aligned, as shown in FIG. 7, the protruding portion of the inner wall portion 12b is embedded in the other metal plate 51. In the through hole 51a, the alignment can be easily performed.
又，由於陰螺紋12b1之長度尺寸也長於上述第1實施形態，故亦可使與陽螺絲50螺合之部份之長度長，而更確實地進行固結。 Further, since the length of the female screw 12b1 is longer than that of the first embodiment described above, the length of the portion screwed to the male screw 50 can be made longer, and the consolidation can be performed more reliably.
第3實施形態 Third embodiment
以下，就本發明之第3實施形態，使用圖8來說明。說明時，以與上述第1實施形態之不同點為中心來說明，關於其他，則與上述第1實施形態相同而省略說明。 Hereinafter, a third embodiment of the present invention will be described with reference to Fig. 8 . In the description, the differences from the above-described first embodiment will be mainly described, and the other points are the same as those in the first embodiment, and the description thereof will be omitted.
圖8是示意地顯示本實施形態之附有螺絲孔之金屬板110之螺絲孔12的圖，是在包含螺絲孔12之中心軸線CL之截面觀看時之相當於圖3的縱截面圖。 Fig. 8 is a view schematically showing a screw hole 12 of a metal plate 110 having a screw hole according to the present embodiment, and is a longitudinal sectional view corresponding to Fig. 3 when viewed in a cross section including a central axis CL of the screw hole 12.
本實施形態之附有螺絲孔之金屬板10其內壁部12b之長度尺寸L2短於上述第1實施形態。結果，內壁部12b之前端12b3位於比金屬板之前述另一面10y更內部之位置。因此，鎖固螺絲之際，於與另一金屬板51之表面之間產生些微之間隙。 The metal plate 10 with a screw hole according to the present embodiment has a length L2 of the inner wall portion 12b shorter than that of the first embodiment. As a result, the front end portion 12b3 of the inner wall portion 12b is located further inside than the other surface 10y of the metal plate. Therefore, when the screw is locked, a slight gap is formed between the surface of the other metal plate 51.
根據此結構，舉例言之，當將附有螺絲孔之金屬板10與另一金屬板51疊合後以陽螺絲50鎖固時，由於內壁部12b較上述第1實施形態短，故與陽螺絲50螺合之部份之長度縮短。然而，因有前述間隙，故鎖緊陽螺絲50之際，容許內壁部12b其前端部12b3可更接近陽螺絲50之螺絲頭。然後，鎖緊陽螺絲50之同時，陽螺絲50將內壁部12b朝自身拉入，結果，圓筒狀之內壁部12b縮徑。藉此，內壁部12b更緊密地對陽螺絲50密合，而可確保高固結力。 According to this configuration, for example, when the metal plate 10 with the screw hole is overlapped with the other metal plate 51 and then locked by the male screw 50, since the inner wall portion 12b is shorter than the first embodiment, The length of the portion where the male screw 50 is screwed is shortened. However, due to the aforementioned gap, when the male screw 50 is locked, the front end portion 12b3 of the inner wall portion 12b is allowed to be closer to the screw head of the male screw 50. Then, while the male screw 50 is locked, the male screw 50 pulls the inner wall portion 12b toward itself, and as a result, the cylindrical inner wall portion 12b is reduced in diameter. Thereby, the inner wall portion 12b tightly closes the male screw 50, and a high consolidation force can be secured.
第4實施形態 Fourth embodiment
以下，就本發明之第4實施形態，使用圖9來說明。說明時，以與上述第1實施形態之不同點為中心來說明，關於其他，則與上述第1實施形態相同而省略說明。 Hereinafter, a fourth embodiment of the present invention will be described with reference to Fig. 9 . In the description, the differences from the above-described first embodiment will be mainly described, and the other points are the same as those in the first embodiment, and the description thereof will be omitted.
圖9是示意地顯示本實施形態之附有螺絲孔之金屬板200之螺絲孔212的圖，是在包含螺絲孔212之中心軸線CL之截面觀看時之相當於圖3的縱截面圖。 Fig. 9 is a view schematically showing a screw hole 212 of a metal plate 200 with a screw hole according to the present embodiment, and is a longitudinal sectional view corresponding to Fig. 3 when viewed in a cross section including a central axis CL of the screw hole 212.
本實施形態之附有螺絲孔之金屬板200為具有螺絲孔212之金屬板，螺絲孔212具有從金屬板220之其中一面立起之圓筒狀內壁部212b、從內壁部212b之端緣翻折至內壁部212b之外側的圓筒狀外壁部212a，於內壁部212b之內周面形成有陰螺紋212b1。 The metal plate 200 with the screw hole in the embodiment is a metal plate having a screw hole 212 having a cylindrical inner wall portion 212b rising from one side of the metal plate 220 and the end portion from the inner wall portion 212b. The cylindrical outer wall portion 212a is folded over to the outer side of the inner wall portion 212b, and a female screw 212b1 is formed on the inner circumferential surface of the inner wall portion 212b.
雖然此結構與上述第1實施形態不同，無法獲得內壁部212b之彈回之效果，但可以外壁部212a阻擋鎖緊陽螺絲(不圖示)之際之內壁部212b之擴徑方向的變形。是故，由於可限制內壁部212b之過度之變形，故即使金屬板220之板厚薄，亦可防止螺絲孔212之破損或固結力之降低。 Although this configuration is different from the above-described first embodiment, the effect of springback of the inner wall portion 212b cannot be obtained, but the outer wall portion 212a can block the diameter expansion direction of the inner wall portion 212b when the male screw (not shown) is locked. Deformation. Therefore, since the excessive deformation of the inner wall portion 212b can be restricted, even if the thickness of the metal plate 220 is thin, the breakage of the screw hole 212 or the reduction of the fixing force can be prevented.
此外，本實施形態之附有螺絲孔之金屬板200亦可使用作為框體之構成要件。即，在具備具有螺絲孔之金屬板、具有貫穿孔之構件、在***前述貫穿孔之狀態下旋入前述螺絲孔而將前述金屬板與具有前述貫穿孔之構件結合的陽螺絲之框體中，可使用上述附有螺絲孔之金屬板200作為前述金屬板。 Further, the metal plate 200 with the screw holes of the present embodiment can also be used as a constituent element of the frame. In other words, a metal plate having a screw hole, a member having a through hole, and a frame in which the screw hole is inserted into the through hole and the metal plate is coupled to the member having the through hole is provided in the frame. As the aforementioned metal plate, the above-mentioned metal plate 200 with a screw hole can be used.
為驗證本發明之效果，以本發明附有螺絲孔之金 屬板的製造方法，於金屬板形成螺絲孔，進行了評價該螺絲孔之固結力之實驗。 In order to verify the effect of the present invention, the gold of the screw hole is attached to the present invention. In the manufacturing method of the slab, an screw hole was formed in the metal plate, and an experiment for evaluating the fixing force of the screw hole was performed.
試樣使用板厚0.4~0.6mm且拉伸強度為270MPa級之鋼板。以使用圖5A~圖5D所說明之第1實施形態之附有螺絲孔之金屬板的製造方法，於該等鋼板加工在JIS B0205(2001)之標稱直徑為M3之螺絲孔。 The sample used was a steel plate having a thickness of 0.4 to 0.6 mm and a tensile strength of 270 MPa. In the method of manufacturing a metal plate with a screw hole according to the first embodiment described with reference to FIGS. 5A to 5D, the steel plate is machined with a screw hole having a nominal diameter of M3 in JIS B0205 (2001).
外壁部成形步驟以撐壓加工進行，並使用外徑3.2mm之撐壓用衝頭35、具有內徑4.6mm之凹部之衝模36、坯料夾36a，成形了高度1.4mm之外壁部20a。此時，使撐壓用衝頭35之肩部半徑R變化。又，鑽孔步驟使用鑽孔用衝頭31及鑽孔用衝模32，以剪切加工進行，此時，使預鑽孔20b1之半徑r變化。內壁部成形步驟使用前端為錐狀之擴孔用衝頭37、擴孔用衝模38及坯料夾39來進行。擴孔用衝頭37使用筆直部之半徑1.2mm、錐部之前端角部對中心軸線CL具有60°之倒角。 The outer wall portion forming step was carried out by a press working, and a wall portion 20a having a height of 1.4 mm was formed by using a press punch 35 having an outer diameter of 3.2 mm, a die 36 having a concave portion having an inner diameter of 4.6 mm, and a blank holder 36a. At this time, the shoulder radius R of the pressing punch 35 is changed. Further, the drilling step uses the drilling punch 31 and the drilling die 32 to perform the shearing process. At this time, the radius r of the pre-drill hole 20b1 is changed. The inner wall portion forming step is performed using a tapping punch 37 having a tapered tip end, a reaming die 38, and a blank holder 39. The reaming punch 37 uses a straight portion having a radius of 1.2 mm, and the front end corner portion of the tapered portion has a chamfer of 60° with respect to the central axis CL.
為比較，根據使用圖12A及圖12B所說明之加工流程，亦製作了於金屬板以習知衝緣加工形成有螺絲孔之附有螺絲孔之金屬板10(實驗No.1-1A,2-1A,3-1A)。 For comparison, according to the processing flow described using FIGS. 12A and 12B, a metal plate 10 with screw holes formed with screw holes formed in a metal plate by conventional punching was also fabricated (Experiment No. 1-1A, 2) -1A, 3-1A).
再者，為比較，亦製作了具有記載於在發明背景所引用之專利文獻2之圖1的構造之附有螺絲孔之金屬板(圖中未示)(實驗No.1-1B,2-1B,3-1B)。此比較例若使用在上述第1實施形態所示之圖1來說明，即為下述構造，前述構造是即使在旋入陽螺絲50之狀態下，外壁部12a之內周面與內壁部12b之外周面仍分開而產生相當大之間隙，內壁部12b之周 圍未以外壁部12a支撐。 Further, for comparison, a metal plate (not shown) having a screw hole having the structure of Fig. 1 described in Patent Document 2 cited in the background of the invention (Experiment No. 1-1B, 2-) was also produced. 1B, 3-1B). This comparative example is described with reference to Fig. 1 shown in the first embodiment, that is, a structure in which the inner circumferential surface and the inner wall portion of the outer wall portion 12a are in a state in which the male screw 50 is screwed. The outer surface of 12b is still separated to create a considerable gap, and the circumference of the inner wall portion 12b It is supported by the outer wall portion 12a.
在各實驗中，分別準備了20片金屬板，加工螺絲孔。此時，調查了加工不良之產生件數，算出製造成品率。 In each experiment, 20 metal plates were prepared and screw holes were machined. At this time, the number of defective manufacturing defects was investigated, and the manufacturing yield was calculated.
又，關於各附有螺絲孔之金屬板之螺絲孔，進行了用以評價固結力之實驗。在評價螺絲孔之固結力之實驗中，使用可測定緊固力矩之螺絲固結裝置，將陽螺絲旋入金屬板之螺孔。此時，測定了陽螺絲之轉角與固結力矩之關係。藉對轉角將所得之陽螺絲之轉角(°)與固結力矩(N．m)之關係微分，而求出陽螺絲之轉角(°)與固結力矩之變化比例(N．m/°)的關係。 Further, an experiment for evaluating the consolidation force was performed on the screw holes of the metal plates each having the screw holes. In the experiment for evaluating the consolidation force of the screw hole, a screw fixing device capable of measuring the tightening torque was used, and the male screw was screwed into the screw hole of the metal plate. At this time, the relationship between the angle of the male screw and the consolidation torque was measured. The angle between the angle (°) of the obtained male screw and the consolidation torque (N.m) is differentiated by the corner, and the ratio of the angle of rotation of the male screw (°) to the consolidation torque (N.m/°) is obtained. Relationship.
圖10是顯示評價螺絲孔之固結力之實驗的陽螺絲之轉角與緊固力矩之關係及陽螺絲之轉角與緊固力矩之變化比例的關係之示意圖。如該圖所示，緊固力矩當轉角隨著陽螺絲之旋入而增加時，從初始階段之幾乎為零之一定狀態轉為增加後，再形成為大致一定，之後減少。從此種轉角與緊固力矩之關係，求出緊固力矩從0之一定狀態轉為增加之點O。 Fig. 10 is a view showing the relationship between the rotation angle of the male screw and the tightening torque and the change ratio of the rotation angle of the male screw to the tightening torque in the experiment for evaluating the fixing force of the screw hole. As shown in the figure, when the rotation angle increases as the male screw is screwed in, the tightening torque is changed from a certain state in which the initial stage is almost zero to an increase, and then formed to be substantially constant and then decreased. From the relationship between the angle of rotation and the tightening torque, the point O at which the tightening torque is changed from a certain state of 0 to an increase is obtained.
另一方面，緊固力矩之變化比例為當轉角隨著陽螺絲之旋入而增加時，在上述點O開始增加後，大致為一定，之後減少。從此種陽螺絲之轉角與緊固力矩之變化比例的關係，求出緊固力矩之變化比例從一定狀態轉為減少之轉角。令在此轉角之顯示轉角與緊固力矩之關係的曲線上之點為點A。此點A表示陰螺紋(螺絲孔)開始塑性變形之點。 On the other hand, the change ratio of the tightening torque is such that when the rotation angle increases as the male screw is screwed in, after the above-mentioned point O starts to increase, it is substantially constant, and then decreases. From the relationship between the angle of change of the angle of the male screw and the tightening torque, the change ratio of the tightening torque is changed from a certain state to a reduced corner. Let the point on the curve of the relationship between the display corner and the tightening torque of this corner be point A. This point A indicates the point at which the female thread (screw hole) begins to plastically deform.
劃出連結如此求出之點O及點A之直線L。又，劃 出使直線L往轉角增加之方向平行移動10°之直線L’。令此直線L’與顯示轉角與緊固力矩之關係之曲線的交點為點B。算出了點B之緊固力矩(N．m)對點A之緊固力矩TA(N．m)之比(TB/TA，無因次)作為評價螺絲孔之固結力的指標。此種TB/TA顯示陰螺紋開始塑性變形後維持緊固力矩之比例、換言之陰螺紋開始塑性變形後維持螺絲孔之與陽螺絲之固結力的比例。因此，TB/TA越大，螺絲孔與陽螺絲之固結力便越優異。 A line L connecting the point O and the point A thus obtained is drawn. Again A straight line L' in which the straight line L is moved in parallel by 10° in the direction in which the corner is increased. Let the intersection of this straight line L' and the curve showing the relationship between the rotation angle and the tightening torque be point B. The ratio of the tightening torque (N.m) of the point B to the tightening torque TA (N.m) of the point A (TB/TA, dimensionless) was calculated as an index for evaluating the fixing force of the screw hole. This type of TB/TA shows the ratio of the tightening torque maintained after the female thread begins to plastically deform, in other words, the ratio of the screw hole to the reinforcing force of the male screw after the female thread begins to plastically deform. Therefore, the larger the TB/TA, the better the consolidation force of the screw holes and the male screws.
表1~3之「固結力之評價」欄之符號的含意如以下。 The meanings of the symbols in the "Evaluation of Consolidation Force" column in Tables 1-3 are as follows.
VG(Very Good)：顯示滿足TB/TA≧1.2。 VG (Very Good): The display satisfies TB/TA≧1.2.
GD(Good)：顯示滿足1.2>TB/TA≧1.0。 GD (Good): The display satisfies 1.2>TB/TA≧1.0.
FA(Fair)：顯示滿足1.0>TB/TA≧0.8。 FA (Fair): The display satisfies 1.0>TB/TA≧0.8.
BD(Bad)：顯示滿足TB/TA<0.8。 BD (Bad): The display satisfies TB/TA<0.8.
於表1~表3顯示各實驗之實驗No.、金屬板之板厚t、螺絲孔之加工法、撐壓用衝頭之肩部半徑R、R/t之值、是否符合前述算式(1)、內壁部成形前之預鑽孔之半徑r、r/t之值、是否符合前述算式(2)、製造成品率、固結力之指標TB/TA之值及其評價、以及實驗分類。在此，是否符合前述算式(1)為Y時，顯示R/t之值滿足前述算式(1)，為N時，則顯示R/t之值不滿足前述算式(1)。又，是否符合前述算式(2)為Y時，顯示r/t之值滿足前述算式(2)，為N時，則顯示r/t之值不滿足前述算式(2)。 Tables 1 to 3 show the experimental No. of each experiment, the thickness t of the metal plate, the processing method of the screw hole, the shoulder radius R of the pressure-bearing punch, R/t, and whether or not the above formula (1) is satisfied. ), the value of the radius r, r/t of the pre-drilled hole before forming the inner wall portion, whether it conforms to the above formula (2), the manufacturing yield, the value of the consolidation force index TB/TA and its evaluation, and the experimental classification . Here, whether or not the above formula (1) is Y is satisfied, the value of R/t is satisfied to satisfy the above formula (1), and when N is N, the value of R/t is not satisfied with the above formula (1). Further, whether or not the expression (2) is Y is satisfied, the value of r/t is satisfied to satisfy the above formula (2), and when N is N, the value of r/t is not satisfied with the above formula (2).
從表1~表3，固結力之評價在比較例為BD，相對於此，在本發明例為VG、GD或FA。因而，可確認本發明之附有螺絲孔之金屬板、具有該附有螺絲孔之金屬板的框體及金屬板之製造方法為螺絲孔與陽螺絲之固結力優異。 From Tables 1 to 3, the evaluation of the consolidation force is BD in the comparative example, whereas in the present invention, it is VG, GD or FA. Therefore, it has been confirmed that the metal plate with the screw hole of the present invention, the frame body having the metal plate with the screw hole, and the metal plate are manufactured by the screw hole and the male screw.
又，比較例(實驗No.1-1A,2-1A,3-1A)中，在衝緣加工，縱壁部之根部因厚度減少而破裂，或因無法以螺紋切削完全形成螺絲孔之螺牙，而產生製品不良，其產生數隨著試樣之板厚變薄而增加。結果，在比較例中，製造成品率皆在70%以下。相對於此，在本發明例中，皆為90%以 上，提高了製造成品率。 Further, in the comparative example (Experiment No. 1-1A, 2-1A, 3-1A), in the burr processing, the root portion of the vertical wall portion was broken due to the decrease in thickness, or the screw hole snail could not be completely formed by the thread cutting. The tooth is defective, and the number of occurrences increases as the thickness of the sample becomes thinner. As a result, in the comparative example, the manufacturing yield was all 70% or less. In contrast, in the example of the present invention, both are 90% In the above, the manufacturing yield is improved.
又，在比較例(實驗No.1-1B、2-1B、3-1B)中，觀察到下述問題點，前述問題點是因相當於內壁部之陰螺紋加工部份未以相當於外壁部之周圍部份支撐，故剛性低，因此，難以進行正確之攻螺絲而無法保持加工精確度的陰螺紋之加工精確度在圓周方向不均一。如此，當相當於內壁部之陰螺紋加工部份之剛性弱而且陰螺紋之加工精確度低時，陰螺紋與陽螺絲之間之構造狀態在陰螺紋之圓周方向易不均一。 Further, in the comparative examples (Experiment No. 1-1B, 2-1B, and 3-1B), the following problem was observed, and the above problem was caused by the fact that the portion of the female thread corresponding to the inner wall portion was not equivalent. Since the peripheral portion of the outer wall portion is supported, the rigidity is low, and therefore, the machining accuracy of the female thread which is difficult to perform the correct tapping screw and cannot maintain the machining accuracy is not uniform in the circumferential direction. Thus, when the rigidity of the female threaded portion corresponding to the inner wall portion is weak and the machining accuracy of the female thread is low, the structural state between the female thread and the male screw is not uniform in the circumferential direction of the female thread.
又，在本發明例中，在R/t之值未滿0.5之實驗及R/t之值超過1.0之測試中，皆確認了製造成品率稍微降低。另一方面，在r/t之值不到0.5之實驗中，確認了製造成品率稍微降低。又，在r/t之值為1.2以下之實驗中，固結力之評價為VG或GD，相對於此，在r/t之值超過1.2之實驗中，固結力之評價為FA。從該等可明瞭，在外壁部成形步驟，使用滿足前述算式(1)之衝頭，並且將預鑽孔鑽鑿為內壁部成形前之預鑽孔之半徑r滿足前述算式(2)，藉此，可更提高製造成品率及螺絲孔之固結力。 Further, in the example of the present invention, in the test in which the value of R/t was less than 0.5 and the value of R/t exceeded 1.0, it was confirmed that the manufacturing yield was slightly lowered. On the other hand, in the experiment in which the value of r/t was less than 0.5, it was confirmed that the manufacturing yield was slightly lowered. Further, in the experiment in which the value of r/t was 1.2 or less, the evaluation of the consolidation force was VG or GD. On the other hand, in the experiment in which the value of r/t exceeded 1.2, the evaluation of the consolidation force was FA. It is apparent from the above that in the outer wall portion forming step, the punch satisfying the above formula (1) is used, and the radius r of the pre-drilled hole before the pre-drilling is drilled into the inner wall portion satisfies the above formula (2), Thereby, the manufacturing yield and the fixing force of the screw holes can be further improved.
根據本發明之附有螺絲孔之金屬板、具有附有螺絲孔之金屬板的框體及附有螺絲孔之金屬板的製造方法，即使為薄板化時，螺絲孔與陽螺絲之固結力優異，並且可防止螺絲孔之破損。因而，將本發明之附有螺絲孔之金屬板、具有附有螺絲孔之金屬板的框體及附有螺絲孔之金屬 板的製造方法應用於空氣調節機之室外機或變電設備之框體時，可相當有助於金屬板之薄板化。 The manufacturing method of the metal plate with the screw hole, the frame body having the metal plate with the screw hole, and the metal plate with the screw hole according to the present invention, the fixing force of the screw hole and the male screw even when the thin plate is formed Excellent and prevents damage to the screw holes. Therefore, the metal plate with the screw hole of the present invention, the frame body having the metal plate with the screw hole, and the metal with the screw hole When the manufacturing method of the board is applied to the frame of the outdoor unit or the substation of the air conditioner, it can contribute to the thinning of the metal sheet.
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| DE102016209119B4 (en) | 2016-05-25 | 2022-05-25 | Schaeffler Technologies AG & Co. KG | Spindle nut, screw drive and method for manufacturing a spindle nut |
| CN109175902A (en) * | 2018-09-21 | 2019-01-11 | 北京长城华冠汽车科技股份有限公司 | The manufacturing process of beam upper installing hole |
| JP7132428B1 (en) * | 2020-10-30 | 2022-09-06 | 東芝三菱電機産業システム株式会社 | Threaded hole processing method |
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