JPH0446652A - Manufacture of main fitting - Google Patents
Manufacture of main fittingInfo
- Publication number
- JPH0446652A JPH0446652A JP15363390A JP15363390A JPH0446652A JP H0446652 A JPH0446652 A JP H0446652A JP 15363390 A JP15363390 A JP 15363390A JP 15363390 A JP15363390 A JP 15363390A JP H0446652 A JPH0446652 A JP H0446652A
- Authority
- JP
- Japan
- Prior art keywords
- die
- punch
- extrusion
- outer shape
- molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title description 20
- 238000001125 extrusion Methods 0.000 claims abstract description 29
- 238000005520 cutting process Methods 0.000 abstract description 32
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 46
- 239000002184 metal Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 21
- 238000000641 cold extrusion Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、主体金具の製造方法に関し、とくに点火栓、
グロープラグ、酸素センサー、水温センサー、ノックセ
ンサー、ヒユーズ式温度センサーまたはサーミスタ式温
度センサー等の主体金具の製造方法に係わる。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a metal shell, and particularly to a method for manufacturing a metal shell, and in particular, a method for manufacturing a metal shell.
It relates to the manufacturing method of metal shells such as glow plugs, oxygen sensors, water temperature sensors, knock sensors, fuse-type temperature sensors, or thermistor-type temperature sensors.
［従来の技術］
特公昭３Ｂ−１１１９号公報においては、外形が六角形
状の係止部と、この係止部より」〕方側に配設され、係
止部より小さい径で外形が円形状の上方側端部とを押出
し成形によって形成する主体金具の製造方法が記載され
ている。[Prior Art] Japanese Patent Publication No. 3B-1119 discloses a locking portion having a hexagonal outer shape, and a locking portion having a circular outer shape with a diameter smaller than that of the locking portion. A method of manufacturing a metal shell is described in which an upper end portion of the metal shell is formed by extrusion molding.
［発明が解決しようとする課題］
ところが、前述の製造方法は、係止部の径と上方側端部
の径との差が大きな主体金具の製法としては有効である
が、係止部の径と上方側端部の径との差が小さい主体金
具の製法としては不向きであった。すなわち、前述の製
造方法では、係止部の外形を６角形状とする型枠の凹所
内に」−万端部の外形を円形状とする筒状パンチホルダ
の先端部を挿入して係止部の形成と上方端部の形成とを
同時に行っている。このため、係止部の対辺寸法と上方
側端部の径との差が小さい主体金具の場合には、パンチ
ホルダの先端部の肉厚が薄くなり強度不足となるので、
押出し成形により主体金具を形成することは困難であっ
た。[Problem to be Solved by the Invention] However, although the above manufacturing method is effective for manufacturing a metal shell in which the difference between the diameter of the locking portion and the diameter of the upper side end is large, the diameter of the locking portion is This method is not suitable for manufacturing a metal shell in which the difference between the diameter of the upper end and the diameter of the upper end is small. That is, in the above-mentioned manufacturing method, the tip of a cylindrical punch holder whose outer shape is circular at all ends is inserted into the recess of the formwork whose outer shape is hexagonal. and the upper end are formed at the same time. For this reason, in the case of a metal shell in which the difference between the opposite side dimension of the locking part and the diameter of the upper end is small, the thickness of the tip of the punch holder becomes thin and the strength is insufficient.
It has been difficult to form the metal shell by extrusion molding.
したがって、従来より、第２１図に示すように、胴体の
上方側に外形が６角形状の筒状端部１０１を押出し成形
によって形成した後に、端部１０１の上方側を切削する
ことにより上方側端部１０２を形成する製造方法を用い
ていた。Therefore, as shown in FIG. 21, conventionally, a cylindrical end portion 101 having a hexagonal outer shape is formed on the upper side of the body by extrusion molding, and then the upper side of the end portion 101 is cut. A manufacturing method for forming the end portion 102 was used.
ところが、この製造方法の場合には、切削工具による切
削箇所が多く削り代が多くなるので主体金具の材料費が
高価となるという課題があった。However, in the case of this manufacturing method, there is a problem that the material cost of the metal shell is high because there are many cutting parts with a cutting tool and there is a large amount of machining allowance.
また、切削箇所が多いため、切削工具による切削時間が
長く、切削工具にかかる負担が大きいので切削工具の切
り刃の寿命が短いという課題があった。Further, since there are many cutting points, the cutting time with the cutting tool is long, and the load on the cutting tool is large, so there is a problem that the life of the cutting edge of the cutting tool is short.
本発明は、胴体の削り代を減少でき、切削工具の切り刃
の寿命を短縮できる主体金具の製造方法の提供を目的と
する。An object of the present invention is to provide a method for manufacturing a metal shell that can reduce the machining allowance of the body and shorten the life of the cutting blade of the cutting tool.
［課題を解決するための手段］
本発明の主体金具の製造方法は、押出し成形によって、
胴体の一端部に外形が円形状の筒状部を形成する第１工
程と、押出し成形によって、前記胴体の前記筒状部より
中央側に、前記筒状部よりやや大きい径で外形が六角形
状の係止部を形成する第２工程とを備えた技術手段を採
用した。[Means for Solving the Problems] The method for manufacturing a metal shell of the present invention includes the steps of:
A first step of forming a cylindrical part with a circular outer shape at one end of the body, and extrusion molding to form a hexagonal outer shape with a slightly larger diameter than the cylindrical part on the center side of the cylindrical part of the body. A technical means including a second step of forming a locking portion was adopted.
［作用］
押出し成形によって胴体の一端部に外形が円形状の筒状
部を形成した後に、押出し成形によって胴体の筒状部よ
り中央側に筒状部よりやや大きい径で外形が六角形状の
係止部を形成する。すなわち、係止部の対辺寸法と筒状
部の径との差が小さい主体金具を係止部より先に筒状部
を押出し成形によって形成する。よって、先端部の肉厚
が薄いパンチホルダを使用することなく、係止部の一端
側に筒状部が形成される。このため、後工程において筒
状部を切削する必要がなくなるので、切削箇所を減少す
ることが可能となる。[Function] After a cylindrical part with a circular outer shape is formed at one end of the body by extrusion molding, a cylindrical part with a hexagonal shape and a diameter slightly larger than the cylindrical part is formed on the center side of the cylindrical part of the body by extrusion molding. Form a stop. That is, in a metal shell in which the difference between the opposite side dimension of the locking part and the diameter of the cylindrical part is small, the cylindrical part is formed by extrusion molding before the locking part. Therefore, the cylindrical portion is formed on one end side of the locking portion without using a punch holder having a thin wall thickness at the tip portion. Therefore, there is no need to cut the cylindrical portion in a post-process, so it is possible to reduce the number of cutting locations.
［発明の効果］
切削工具による切削箇所が減少するので、削り代を減少
できるため、主体金具の材料量が従来より少なくなる。[Effects of the Invention] Since the number of places to be cut by the cutting tool is reduced, the cutting allowance can be reduced, and the amount of material for the metal shell is less than that of the conventional method.
このため、主体金具の材料費が安価となる。Therefore, the material cost of the metal shell becomes low.
また、切削工具による切削箇所が減少するので、切削工
具による切削時間を従来より短縮することができる。こ
のため、切削工具にかかる負担が軽くなるので、切削工
具の切り刃の寿命が長くなる。Furthermore, since the number of places to be cut by the cutting tool is reduced, the cutting time by the cutting tool can be reduced compared to the conventional method. Therefore, the load on the cutting tool is reduced, and the life of the cutting edge of the cutting tool is extended.
［実施例］
本発明の主体金具の製造方法を第１図ないし第２０図に
示す実施例に基づき説明する。[Example] A method for manufacturing a metal shell of the present invention will be described based on an example shown in FIGS. 1 to 20.
第１図ないし第１５図は本発明の第１実施例を示す。第
１図ないし第８図は各成形部における胴体の成形形状を
示し、第９図ないし第１３図は冷間押出し成形機の各成
形部を示す。1 to 15 show a first embodiment of the present invention. 1 to 8 show the molded shape of the body in each molding section, and FIGS. 9 to 13 show each molding section of the cold extrusion molding machine.
冷間押出し成形機は、直線状に配置された第１成形部〜
第５成形部１〜５を備える。The cold extrusion molding machine has a first molding section arranged in a linear manner.
It includes fifth molding parts 1 to 5.
第１成形部１は、第９図に示すように、ダイ１１、パン
チ１２、ピン１３およびキックアウトスリーブ１４を有
し、丸棒状の胴体ａ（第１図）に前方押出し成形を行っ
て胴体ｂ（第２図）を形成する。なお、本実施例では、
第１成形部１によって第２成形部２以降の押出し成形の
ための芯出し成形を行う。As shown in FIG. 9, the first molding section 1 has a die 11, a punch 12, a pin 13, and a kickout sleeve 14, and performs forward extrusion molding on a round bar-shaped body a (FIG. 1) to form a body. b (Fig. 2). In addition, in this example,
The first molding section 1 performs centering molding for extrusion molding of the second molding section 2 and subsequent parts.
第２成形部２は、第１０図に示すように、本発明の第１
工程を行う成形手段であって、ダイ２１、パンチ２２、
パンチホルダ２３、パンチインナスリーブ２４、ピン２
５およびキックアウトスリーブ２６を有し、前方押出し
成形および後方押出し成形を行って胴体Ｃ（第３図およ
び第７図）を形成する。As shown in FIG. 10, the second molding section 2 is a
A molding means for carrying out the process, which includes a die 21, a punch 22,
Punch holder 23, punch inner sleeve 24, pin 2
5 and a kick-out sleeve 26, and is subjected to front extrusion molding and rear extrusion molding to form the fuselage C (FIGS. 3 and 7).
第３成形部３は、第１１図に示すように、本発明の第２
工程を行う成形手段であって、ダイ３１、パンチ３２、
パンチホルダ３３、ピン３４およびキックアウトスリー
ブ３５を有し、六角成形を行って胴体ｄ（第４図および
第８図）を形成する。As shown in FIG. 11, the third molding section 3 is a
The forming means for performing the process includes a die 31, a punch 32,
It has a punch holder 33, a pin 34 and a kick-out sleeve 35, and is hexagonally formed to form a body d (FIGS. 4 and 8).
第４成形部４は、第１２図に示すように、ダイ４１、パ
ンチ４２、パンチホルダ４３、ピン４４およびキックア
ウトスリーブ４５を有し、***成形を行って胴体ｅ（第
５図）を形成する。As shown in FIG. 12, the fourth molding section 4 has a die 41, a punch 42, a punch holder 43, a pin 44, and a kickout sleeve 45, and performs small hole molding to form the body e (FIG. 5). do.
第５成形部５は、第１３図に示すように、ダイ５１、ピ
アシングパンチ５２、パンチホルダ５３、キックアウト
スリーブ５４および切れ端排出部５５を有し、軸穴を貫
通させて胴体ｆ（第６図）を形成する。As shown in FIG. 13, the fifth molding section 5 has a die 51, a piercing punch 52, a punch holder 53, a kickout sleeve 54, and a scrap discharge section 55. form).
なお、本実施例では、第４成形部４および第５成形部５
によって軸穴成形を行う。Note that in this embodiment, the fourth molding section 4 and the fifth molding section 5
The shaft hole is formed by
そして、各ダイ１１．２１．３１．４１．５１は、冷間
押出し成形機の固定部材（図示せず）に一体内に組込ま
れている。また、各パンチ１２．２２．３２．４２．５
２は、冷間押出し成形機の可動部材（図示せず）に一体
内に組込まれている。Each die 11.21.31.41.51 is integrated into a fixed member (not shown) of the cold extrusion molding machine. Also, each punch 12.22.32.42.5
2 is integrated into a movable member (not shown) of a cold extrusion molding machine.
本実施例の点火栓用主体金具の製造方法を第１図ないし
第１５図に基づき説明する。A method of manufacturing the metal shell for a spark plug of this embodiment will be explained based on FIGS. 1 to 15.
■、切断加ニ
スチール（８１０Ｃ）から所定寸法の丸棒状の胴体ａを
切断する。(2) Cut a round bar-shaped body a of a predetermined size from cutting steel (810C).
■、第１押出し加工
切断された胴体ａは、移送装置（図示せず）により第１
成形部１のダイ１１の入口に移送された後に、可動部材
の図示下方への移動に伴なうパンチ１２の図示下方への
移動によりダイ１１内に挿入される。(2) The body a cut by the first extrusion process is transferred to the first extrusion by a transfer device (not shown).
After being transferred to the entrance of the die 11 of the molding section 1, the punch 12 is moved downward in the drawing as the movable member moves downward in the drawing, thereby being inserted into the die 11.
このとき、ダイ１１によって、胴体ａの一方側に外形が
円形状の第１端部１１１が形成され、胴体ａの他方側に
第１端部１１１より小さい径で外形が円形状の第２端部
１１２が形成される。さらに、第１端部１１１と第２端
部１１２との間には、外形が椀状の中央部１１３が形成
される。同時に、パンチ１２の先端部によって、胴体ａ
の一端面の軸心上に第１凹部１１４が形成され、ビン１
３の先端部によって、他端面の軸心上に第２凹部１１５
が形成される。このため、胴体すが形成される。At this time, the die 11 forms a first end 111 having a circular outer shape on one side of the body a, and a second end having a circular outer shape and a smaller diameter than the first end 111 on the other side of the body a. A section 112 is formed. Further, a central portion 113 having a bowl-like outer shape is formed between the first end portion 111 and the second end portion 112. At the same time, the tip of the punch 12 punches the body a.
A first recess 114 is formed on the axis of one end surface of the bottle 1.
3, a second recess 115 is formed on the axis of the other end surface.
is formed. As a result, a torso frame is formed.
その後に、可動部材が固定部材から離れて図示下方に移
動することによって、パンチ１２が胴体すから離れ、キ
ックアウトスリーブ１４により胴体すがダイ１１内から
蹴り出される。Thereafter, the movable member separates from the fixed member and moves downward in the figure, so that the punch 12 separates from the body, and the kick-out sleeve 14 kicks out the body from within the die 11.
■、第２押出し加工
第１成形部１により形成された胴体すは、移送装置によ
り第１成形部１のダイ１１の入口がら第２成形部２のダ
イ２１の入口に移送された後に、可動部材の図示下方へ
の移動に伴なうパンチ２２の図示下方への移動により胴
体すがダイ２１内に挿入される。(2) Second extrusion process The body formed by the first forming section 1 is moved from the inlet of the die 11 of the first forming section 1 to the inlet of the die 21 of the second forming section 2 by the transfer device. As the member moves downward in the figure, the punch 22 moves downward in the figure, thereby inserting the body into the die 21.
このとき、ダイ２１によって、対角寸法と同一の径の第
１端部１２１が胴体すに形成され、その第１端部１２１
より一端側に外形が円形状で第１端部１２１より小さい
径の筒状部１２０が胴体すに形成される。また、ダイ２
１によって胴体すの中央に第１端部１２１より小さく第
２端部１２２より大きい径の中央部１２３が胴体すに形
成される。At this time, a first end 121 having the same diameter as the diagonal dimension is formed on the body by the die 21, and the first end 121
A cylindrical portion 120 having a circular outer shape and a smaller diameter than the first end portion 121 is formed on the body nearer to one end side. Also, die 2
1, a central portion 123 having a diameter smaller than the first end portion 121 and larger than the second end portion 122 is formed in the center of the fuselage sheet.
同時に、パンチ２２の先端部によって、胴体すの一端面
の軸心上に第１凹部１１４より深い深さの第１凹部１２
４が形成され、ピン１３の先端部によって、他端面の軸
心上に第２凹部１１５より深い深さの第２凹部１２５が
形成される。このため、複数の段付きの胴体Ｃが形成さ
れる。At the same time, the tip of the punch 22 punches a first recess 114 deeper than the first recess 114 on the axis of one end surface of the body.
4 is formed, and a second recess 125 having a deeper depth than the second recess 115 is formed by the tip of the pin 13 on the axis of the other end surface. Therefore, a plurality of stepped bodies C are formed.
その後に、可動部材が固定部材から離れて図示上方に移
動することによって、パンチ２２が胴体Ｃから離れ、キ
ックアウトスリーブ２６により胴体Ｃがダイ２１内から
蹴り出される。Thereafter, the movable member separates from the fixed member and moves upward in the figure, so that the punch 22 separates from the body C, and the kick-out sleeve 26 kicks the body C out of the die 21.
■、第３押出し加工
第２成形部２により形成された胴体Ｃは、移送装置によ
り第２成形部２のダイ２１の入口から第３成形部３のダ
イ３１の入口に移送された後に、可動部材の図示下方へ
の移動に伴なうパンチ３２の図示下方への移動により胴
体Ｃがダイ３１内に挿入される。(3) Third extrusion process The body C formed by the second molding section 2 is moved from the entrance of the die 21 of the second molding section 2 to the entrance of the die 31 of the third molding section 3 by the transfer device. The body C is inserted into the die 31 as the punch 32 moves downward in the drawing as the member moves downward in the drawing.
このとき、ダイ３１によって、外形が六角形状で対角寸
法が第１端部１２１の径とほぼ同じ寸法の係止部１３１
が、胴体Ｃに形成される。同時に、パンチ３２によって
、胴体Ｃの一端面の軸心上に第１凹部１２４より深い、
深さの第１凹部１３４が形成される。At this time, a locking portion 131 having a hexagonal outer shape and a diagonal dimension approximately the same as the diameter of the first end portion 121 is formed by the die 31.
is formed on the fuselage C. At the same time, the punch 32 creates a hole deeper than the first recess 124 on the axis of one end surface of the body C.
A first recess 134 having a depth is formed.
このとき、筒状部１３０、第２端部１３２および第２凹
部１３５の形状は胴体Ｃの形状とほぼ同一である。この
ため、複数の段付きの胴体ｄが形成される。At this time, the shapes of the cylindrical portion 130, the second end portion 132, and the second recessed portion 135 are substantially the same as the shape of the body C. Therefore, a plurality of stepped bodies d are formed.
その後に、可動部材が固定部材から離れて図示上方に移
動することによって、パンチ３２が胴体ｄから離れ、キ
ックアウトスリーブ３５により胴体ｄがダイ３１内から
蹴り出される。Thereafter, the movable member separates from the fixed member and moves upward in the figure, so that the punch 32 separates from the body d, and the kick-out sleeve 35 kicks the body d out of the die 31.
■、第４押出し加工
第３成形部３により形成された胴体ｄは、移送装置によ
り第３成形部３のダイ３１の入口がち第４成形部４のダ
イ４１の入口に移送された後に、可動部材の図示下方へ
の移動に伴なうパンチ４２の図示下方への移動により胴
体ｄの第２端部１３２および中央部１３３がダイ４１内
に挿入される。(4) Fourth extrusion The body d formed by the third molding section 3 is moved by the transfer device to the entrance of the die 41 of the fourth molding section 4. The second end portion 132 and the center portion 133 of the body d are inserted into the die 41 by moving the punch 42 downward in the drawing as the member moves downward in the drawing.
このとき、ダイ４１によって、胴体ｄの他端側に第２端
部１３２より寸法の長い尻部１４２が形成される。同時
に、バンチ４２によって、胴体Ｃの一端面の細心上に第
１凹部１３４より深さの深い段付きの第１凹部１４４が
形成される。At this time, the die 41 forms the butt part 142, which is longer in size than the second end part 132, on the other end side of the body d. At the same time, the bunches 42 form a stepped first recess 144 deeper than the first recess 134 on one end surface of the body C.
このとき、筒状部１４０、係止部１４１および第２凹部
１４５の形状は胴体ｄの形状とほぼ同一である。At this time, the shapes of the cylindrical portion 140, the locking portion 141, and the second recessed portion 145 are substantially the same as the shape of the body d.
このため、複数の段付きの胴体ｅが形成される。Therefore, a plurality of stepped bodies e are formed.
その後に、可動部材が固定部材から離れて図示上方に移
動することによって、バンチ４２が胴体ｅの図示上端面
から離れ、キックアウトスリーブ４５により胴体ｅがダ
イ４１内から蹴り出される。Thereafter, the movable member separates from the fixed member and moves upward in the figure, so that the bunch 42 separates from the upper end surface of the body e in the figure, and the kick-out sleeve 45 kicks the body e out of the die 41.
■、第５押出し加工
第４成形部４により形成された胴体ｅは、移送装置によ
り第４成形部４のダイ４１の入口から第５成形部５のダ
イ５１の入口に移送された後に、可動部材の図示下方へ
の移動に伴なうピアシングパンチ５２の図示下方への移
動により胴体ｅの尻部１４２および中央部１４３をダイ
５１内に挿入される。(5) Fifth extrusion The body e formed by the fourth forming section 4 is moved from the entrance of the die 41 of the fourth forming section 4 to the entrance of the die 51 of the fifth forming section 5 by the transfer device. As the member moves downward in the figure, the piercing punch 52 moves downward in the figure, thereby inserting the butt part 142 and the center part 143 of the body e into the die 51.
このとき、ピアシングパンチ５２によって、第１凹部１
５４と第２凹部１５５とを連通して、胴体ｅを軸方向に
貫通する軸穴１５６が形成される。なお、蹴り出された
切れ端は、ピアシングパンチ５２により切れ端排出部５
５を通って外部に蹴り出される。At this time, the piercing punch 52 punches the first recess 1.
54 and the second recess 155, a shaft hole 156 is formed that passes through the body e in the axial direction. The kicked out scraps are sent to the scrap discharge section 5 by the piercing punch 52.
5 and is kicked out to the outside.
このとき、筒状部１５０および係止部１５１の形状は胴
体ｅの形状とほぼ同一である。このため、複数の段付き
の胴体ｆが形成される。At this time, the shapes of the cylindrical portion 150 and the locking portion 151 are substantially the same as the shape of the body e. Therefore, a plurality of stepped bodies f are formed.
その後に、可動部材が固定部材から離れて図示上方に移
動することによって、ピアシングパンチ５２が胴体ｆか
ら離れ、キックアウトスリーブ５４により胴体ｆがダイ
５１内から蹴り出される。Thereafter, the movable member separates from the fixed member and moves upward in the figure, so that the piercing punch 52 separates from the body f, and the body f is kicked out from within the die 51 by the kick-out sleeve 54.
■、切削加工
前述のような押出し成形によって形成された胴体ｆは、
第１４図に示すように、尻部１５２の外周におねじ７１
、さらに中央部１５３に小さい径の小径部７２などが切
削工具により切削することによって筒状主体金具７が製
造される。そして、主体金具７の尻部１５２の先端面に
は、任意の形状の外側電極７３が溶接等の接合方法によ
り取り付けられる。■ Cutting process The body f formed by extrusion molding as described above is
As shown in FIG.
Further, the cylindrical metal shell 7 is manufactured by cutting a small diameter portion 72 and the like in the central portion 153 with a cutting tool. Then, an outer electrode 73 having an arbitrary shape is attached to the tip end surface of the butt portion 152 of the metal shell 7 by a joining method such as welding.
したがって、係止部１３１の対辺寸法と筒状部１３０（
１２０）の径との差が小さい主体金具７を外形が六角形
状の係止部１３１を形成する第３押出し加工より前の第
２押出し加工で外形が円形状の筒状部１２０を成形する
ことができる。Therefore, the opposite side dimension of the locking part 131 and the cylindrical part 130 (
120) to form a cylindrical part 120 with a circular outer shape in a second extrusion process before a third extrusion process to form a locking part 131 with a hexagonal outer shape. I can do it.
すなわち、従来装置のような先端部の肉厚が薄いパンチ
ホルダによって、筒状部１３０（１２０）および対辺寸
法と同一の径の係止部１３１を形成するのではなく、第
２押出し加工で先端部の肉厚が厚いパンチホルダ２３に
よって、対角寸法と同一の径の第１端部１２１の一端側
に筒状部１２０を形成する。That is, instead of forming the locking part 131 with the same diameter as the cylindrical part 130 (120) and the opposite side dimension using a punch holder with a thin wall thickness at the tip as in the conventional device, the tip is formed in the second extrusion process. A cylindrical portion 120 is formed at one end side of a first end portion 121 having the same diameter as the diagonal dimension by the punch holder 23 having a thick wall.
このため、切削工程において筒状部１３０（１２０）の
切削量を減少することが可能となる。よって、主体金具
７の材料量が従来より少なくなるので、主体金具７の材
料費が安価となる。また、切削工具による切削時間を従
来より短縮することができる。このため、切削工具にか
かる負担を軽減できるので、切削工具の切り刃の寿命が
長くなる。Therefore, it is possible to reduce the amount of cutting of the cylindrical portion 130 (120) in the cutting process. Therefore, since the amount of material for the metal shell 7 is smaller than that of the conventional metal shell 7, the material cost for the metal shell 7 is reduced. Further, the cutting time using the cutting tool can be reduced compared to the conventional method. Therefore, the load on the cutting tool can be reduced, and the life of the cutting edge of the cutting tool can be extended.
そして、以上のような製造方法により製造された主体金
具７の内部に中心電極６１、絶縁体６２などを一体的に
組み付けることによって、第１３図に示すようなガソリ
ンエンジンのシリンダヘッドに取り付けられる点火栓６
が製造される。By integrally assembling the center electrode 61, insulator 62, etc. inside the metal shell 7 manufactured by the manufacturing method described above, an ignition device that is attached to the cylinder head of a gasoline engine as shown in FIG. Stopper 6
is manufactured.
第１６図ないし第２０図は本発明の第２実施例を示す。16 to 20 show a second embodiment of the present invention.
第１６図は第２成形部における胴体の成形形状を示し、
第１７図および第１８図は第２成形部における胴体の成
形形状を示す。第１９図は冷間押出し成形機の第２成形
部を示し、第２０図は冷間押出し成形機の第３成形部を
示す。FIG. 16 shows the molded shape of the fuselage in the second molding section,
FIGS. 17 and 18 show the molded shape of the fuselage in the second molding section. FIG. 19 shows the second forming section of the cold extrusion molding machine, and FIG. 20 shows the third forming section of the cold extrusion molding machine.
（第１実施例と同−機能物は同番号を付す）第１成形部
８（第１工程を行う成形部）は、ダイ８１、パンチ８２
、ピン８３およびキックアウトスリーブ８４を有する。(Same as the first embodiment - Functional objects are given the same numbers) The first molding section 8 (the molding section that performs the first step) includes a die 81, a punch 82
, a pin 83 and a kickout sleeve 84.
第２成形部９（第２工程を行う成形部）は、ダイ９１、
パンチ９２、ピン９３およびキックアウトスリーブ９４
を有する。The second molding section 9 (the molding section that performs the second step) includes a die 91,
Punch 92, pin 93 and kickout sleeve 94
has.
本実施例では、第１押出し加工で係止部の六角対辺と同
一の径の第１端部１８１、およびこの第１端部１８１と
同一の径の筒状部１８０を有する胴体すを形成した後に
、パンチホルダを使用することなく第２押出し加工で外
形が六角形状の係止部１９１を形成する。In this example, a body chair having a first end 181 having the same diameter as the hexagonal opposite side of the locking part and a cylindrical part 180 having the same diameter as this first end 181 is formed in the first extrusion process. Later, a locking portion 191 having a hexagonal outer shape is formed by a second extrusion process without using a punch holder.
（変形例）
第１実施例では、第３成形部において胴体に係止部を形
成したが、筒状部を形成した後であればいつでも胴体に
係止部を形成しても良い。(Modification) In the first embodiment, the locking portion was formed on the body in the third molding portion, but the locking portion may be formed on the body at any time after the cylindrical portion is formed.
第２実施例では、第２成形部において胴体に係止部を形
成したが、筒状部を形成した後であればいつでも胴体に
係止部を形成しても良い。In the second embodiment, the locking part was formed on the body in the second molding part, but the locking part may be formed on the body at any time after the cylindrical part is formed.
本実施例では、本発明を点火栓用主体金具の製造方法に
採用したが、本発明をグロープラグ、酸素センサー、水
温センサー、ノックセンサー、ヒユーズ式温度センサー
またはサーミスタ式温度センサー等の筒状部および係止
部を有する主体金具の製造方法に採用しても良い。In this example, the present invention was adopted as a method for manufacturing a main metal fitting for a spark plug. The present invention may also be employed in a method of manufacturing a metal shell having a locking portion.
第１図ないし第１５図は本発明の第１実施例を示す。
第１図ないし第６図は胴体の成形形状を示す断面図、第
７図は第３図の上視図、第８図は第４図の上視図、第９
図ないし第１３図は冷間押出し成形機の各成形部を示す
断面図である。第１４図は点火栓用主体金具を示す半断
面図、第１５図は点火栓を示す半断面図である。
第１６図ないし第２０図は本発明の第２実施例を示す。
第１６図および第１７図は胴体の成形形状を示し、第１
８図は第１７図の上視図、第１９図は第２成形部を示す
断面図、第２０図は冷間押出し成形機の第３成形部を示
す断面図である。
第２１図は従来の製造方法により製造された胴体の成形
形状を示す断面図である。
図中
１・・・第１成形部 ２・・・第２成形部 ３・・・第
３成形部（第１工程を行う成形部） ４・・・第４成
形部（第２工程を行う成形部） ５・・・第５成形部
６・・・点火栓 ７・・・主体金具 ８・・・第１成
形部（第１工程を行う成形部） ９・・・第２成形部
（第２工程を行う成形部）１２０．１３０．１４０．１
５０．１８０・・・筒状部 １３１．１４１．１５１．
１９１ 、、・係止部 ａ〜ｆ・・・胴体
第１図
第２図
第３図
第４図
第５図
第６図
第８図
第１４図
第１５０
第１６図
第１７図
第１８図
第２１図1 to 15 show a first embodiment of the present invention. Figures 1 to 6 are cross-sectional views showing the molded shape of the fuselage, Figure 7 is a top view of Figure 3, Figure 8 is a top view of Figure 4, and Figure 9 is a top view of Figure 4.
13 through 13 are cross-sectional views showing each molding section of the cold extrusion molding machine. FIG. 14 is a half-sectional view showing the metal shell for the spark plug, and FIG. 15 is a half-sectional view showing the spark plug. 16 to 20 show a second embodiment of the present invention. Figures 16 and 17 show the molded shape of the fuselage.
FIG. 8 is a top view of FIG. 17, FIG. 19 is a sectional view showing the second forming section, and FIG. 20 is a sectional view showing the third forming section of the cold extrusion molding machine. FIG. 21 is a sectional view showing a molded shape of a fuselage manufactured by a conventional manufacturing method. In the figure, 1...First molding section 2...Second molding section 3...Third molding section (molding section that performs the first step) 4...Fourth molding section (molding section that performs the second step) ) 5... Fifth molded part 6... Spark plug 7... Metal shell 8... First molded part (formed part that performs the first step) 9... Second molded part (second molded part) Molding department that performs the process) 120.130.140.1
50.180...Cylindrical part 131.141.151.
191 ,... Locking parts a to f...Body Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 8 Fig. 14 Fig. 150 Fig. 16 Fig. 17 Fig. 18 Figure 21
Claims (1)
円形状の筒状部を形成する第１工程と、 （ｂ）押出し成形によって、前記胴体の前記筒状部より
中央側に、前記筒状部よりやや大きい径で外形が六角形
状の係止部を形成する第２工程とを備えた主体金具の製
造方法。[Scope of Claims] 1) (a) A first step of forming a cylindrical part with a circular outer shape at one end of the body by extrusion molding; (b) forming the cylindrical part of the body by extrusion molding; a second step of forming a locking part closer to the center and having a slightly larger diameter than the cylindrical part and a hexagonal outer shape.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15363390A JPH0446652A (en) | 1990-06-12 | 1990-06-12 | Manufacture of main fitting |
| BR919102529A BR9102529A (en) | 1990-06-12 | 1991-06-06 | METHOD OF MANUFACTURING THE METALLIC CASTLE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15363390A JPH0446652A (en) | 1990-06-12 | 1990-06-12 | Manufacture of main fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0446652A true JPH0446652A (en) | 1992-02-17 |
Family
ID=15566776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15363390A Pending JPH0446652A (en) | 1990-06-12 | 1990-06-12 | Manufacture of main fitting |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0446652A (en) |
| BR (1) | BR9102529A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002011543A (en) * | 2000-06-30 | 2002-01-15 | Ngk Spark Plug Co Ltd | Manufacturing method of cylindrical metal piece |
| WO2002055232A1 (en) * | 2001-01-09 | 2002-07-18 | ZF Lemförder Metallwaren AG | Method for producing a housing for a ball joint |
| JP2002224792A (en) * | 2001-01-31 | 2002-08-13 | Furukawa Electric Co Ltd:The | Method for manufacturing hollow body of polygonal section and hollow body of polygonal section manufactured in the same method |
| JP2012143801A (en) * | 2011-01-14 | 2012-08-02 | Ngk Spark Plug Co Ltd | Method for manufacturing main metal piece for spark plug and method for manufacturing spark plug |
| CN105290289A (en) * | 2015-10-28 | 2016-02-03 | 浙江名将汽配有限公司 | Manufacturing die and manufacturing method for inner hexagonal socket |
-
1990
- 1990-06-12 JP JP15363390A patent/JPH0446652A/en active Pending
-
1991
- 1991-06-06 BR BR919102529A patent/BR9102529A/en not_active Application Discontinuation
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002011543A (en) * | 2000-06-30 | 2002-01-15 | Ngk Spark Plug Co Ltd | Manufacturing method of cylindrical metal piece |
| WO2002055232A1 (en) * | 2001-01-09 | 2002-07-18 | ZF Lemförder Metallwaren AG | Method for producing a housing for a ball joint |
| US6735997B2 (en) | 2001-01-09 | 2004-05-18 | ZF Lemförder Metallwaren AG | Method for producing a housing for a ball joint |
| JP2002224792A (en) * | 2001-01-31 | 2002-08-13 | Furukawa Electric Co Ltd:The | Method for manufacturing hollow body of polygonal section and hollow body of polygonal section manufactured in the same method |
| JP2012143801A (en) * | 2011-01-14 | 2012-08-02 | Ngk Spark Plug Co Ltd | Method for manufacturing main metal piece for spark plug and method for manufacturing spark plug |
| CN105290289A (en) * | 2015-10-28 | 2016-02-03 | 浙江名将汽配有限公司 | Manufacturing die and manufacturing method for inner hexagonal socket |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9102529A (en) | 1992-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4352283A (en) | Method of forming spark plug bodies | |
| JP4147704B2 (en) | Manufacturing method of metal shell for spark plug | |
| US9643238B2 (en) | Manufacturing method of metal shell formed body for spark plug, manufacturing method of metal shell for spark plug, and spark plug manufacturing method | |
| CN101823117B (en) | Method of producing metallic shell for spark plug and die for producing the metallic shell | |
| GB2141654A (en) | Method of forming spark plug shells | |
| JP3431950B2 (en) | Manufacturing method of metal shell for spark plug | |
| JP6532813B2 (en) | Method of manufacturing different diameter cylindrical body by cold forging | |
| JP6612600B2 (en) | Manufacturing method by cold forging of cylindrical metal fittings with polygonal flanges | |
| JPH0446652A (en) | Manufacture of main fitting | |
| JPH0620577B2 (en) | Method for manufacturing spark plug terminal nut by plastic working | |
| JPH0390243A (en) | Manufacture of main body fixture | |
| JPH0361530B2 (en) | ||
| JPH0390244A (en) | Manufacture of main body fixture | |
| US7104109B2 (en) | Double-cavity heading die | |
| JPH0369613B2 (en) | ||
| JP3471410B2 (en) | Manufacturing method of metal shell for spark plug | |
| JP3454596B2 (en) | Method of manufacturing composite electrode for spark plug | |
| JP2965360B2 (en) | Manufacturing method of metal shell for glow plug | |
| JP4241506B2 (en) | Method for manufacturing glow plug metal shell and method for manufacturing glow plug | |
| JPH038531A (en) | Manufacture of main fittings | |
| JPH0313247A (en) | Manufacture of main metallic fitting | |
| JPH0420714A (en) | Manufacture of main metallic member for glow plug | |
| JPS6222699B2 (en) | ||
| JPH08285280A (en) | Manufacture of housing for glow plug | |
| JP4342289B2 (en) | Method for manufacturing spark plug metal shell and method for manufacturing spark plug |