JP3642859B2 - Manufacturing method for metal fittings for inserts - Google Patents

Manufacturing method for metal fittings for inserts Download PDF

Info

Publication number
JP3642859B2
JP3642859B2 JP97796A JP97796A JP3642859B2 JP 3642859 B2 JP3642859 B2 JP 3642859B2 JP 97796 A JP97796 A JP 97796A JP 97796 A JP97796 A JP 97796A JP 3642859 B2 JP3642859 B2 JP 3642859B2
Authority
JP
Japan
Prior art keywords
metal material
diameter portion
groove
small
forging machine
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.)
Expired - Fee Related
Application number
JP97796A
Other languages
Japanese (ja)
Other versions
JPH09187832A (en
Inventor
順造 小沢
徹 大木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aoyama Seisakusho Co Ltd
Original Assignee
Aoyama Seisakusho Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aoyama Seisakusho Co Ltd filed Critical Aoyama Seisakusho Co Ltd
Priority to JP97796A priority Critical patent/JP3642859B2/en
Publication of JPH09187832A publication Critical patent/JPH09187832A/en
Application granted granted Critical
Publication of JP3642859B2 publication Critical patent/JP3642859B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は樹脂製品にインサートされる圧造成形品のインサート用金具の製造法に関するものである。
【０００２】
【従来の技術】
従来、樹脂製品にインサートされる圧造成形品のインサート金具は樹脂成形後に、インサート用金具に取り付けられた他部材にかかる荷重によって脱落したり、がたが生じないようにするため、図８に示されるように、外周面に環状の凹溝３０を切削加工したり、螺旋溝を旋盤により切削加工するか、ローレット切り機により図９に示されるように、ローレット３１をインサート用金具の外周面に切っていた。しかし、このような加工は別工程の機械により行われ、生産性が低下するという問題があった。このため、インサート用金具に装着される他部材に最も大きくかかる荷重の方向により、抜け止めの溝か、回り止めの溝かのいずれか一方のみを形成して工数の削減を計っていた。これらの結果、抜け止め用の溝を設けたものにおいては、小さな力ではあるが、回り止め方向に長期間荷重を受け続けると、回ってしまうという問題があり、また、回り止め用の溝を設けたものにおいては、小さな力ではあるが、抜け止め方向に長期間荷重を受け続けると、脱落してしまうという問題があった。また、抜け止めと回り止めの双方の荷重に対しては、ローレット切り機で綾目のローレットを形成して両方向の荷重に耐えるようにしていた。しかし、ローレット切り機による綾目のローレットは溝が浅くなるうえに、綾目のため、大きな荷重がかかる場合には不十分で、がたが発生したり、最悪の場合には脱落するという問題があった。
【０００３】
【発明が解決しようとする課題】
本発明は回り止めと抜け止めの双方の荷重に耐えるインサート用金具を他の機械加工を施すことなく圧造のみで製造することができるインサート用金具の製造法を提供することを目的とするものである。
【０００４】
【課題を解決するための手段】
前述の目的を達成するため、一定寸法の短柱状よりなる金属素材の先方部を圧造成形機により若干先細に予備成形したうえ、該金属素材の外周面を圧造成形機により絞り成形して太径部と小径部に成形し、また、金属素材の上下面に凹部を成形し、さらに、圧造成形機により金属素材の太径部の下半部に深縦溝の平目ローレットを成形したうえ、前記凹部に孔開け加工を施し、次に、平目ローレットが形成された孔開きの金属素材小径部を圧造成形機により圧潰成形して、小径部を太径部と同径の拡径部とするとともに、平目ローレットの下端縁に環状凹溝を成形したインサート用金具の製造法を請求項１の発明としたものである。
【０００５】
【発明の実施の形態】
本発明により製造されるインサート金具は図１に示されるように、他部材装着用の中心孔１ａを透設した金属製の円筒体１の外周面中間部に、該円筒体と同じ外径の深縦溝の平目ローレット２が形成され、該平目ローレット２の下端縁に、平目ローレット２の深縦溝と続いて開口が拡開される断面形状を略Ｖ字状とした環状凹溝が形成されたものとなる。
【０００６】
このようなインサート金具は、雌雄いずれかの成形型に円筒体１を装着したうえ、型締めして樹脂成形を行えば、円筒体１の周縁には樹脂が流入し、平目ローレット２の深縦溝や環状凹溝３に樹脂は充満して硬化し、円筒体１は平目ローレット２の深縦溝に続く環状凹溝３内において固化した樹脂により強固に一体化されることとなる。そして、樹脂成形品にインサートされた円筒体１の中心孔１ａをスリーブとして、他部材の装置の軸等を嵌挿して使用すれば、他部材の軸にかかる上下方向の荷重は環状凹溝３により確実に保持され、抜けは防止される。また、軸にかかる回転方向の荷重は深縦溝の平目ローレット２により保持されるうえに、環状凹溝３は断面形状を略Ｖ字状としているので成形時樹脂の流れが良いうえに平目ローレット２の深縦溝と連なっているから、大きな荷重が円筒体１に加わっても樹脂が破断するおそれはなく、円筒体１は長期間にわたってがたを生じることがない。
【０００７】
次に、本発明のインサート金具の製造法を図２〜図７に基づいて詳細に説明する。
１０は棒鋼を一定寸法に切断した短柱状の金属素材であり、該金属素材１０の先方部は図３に示されるように、若干先細１１に予備成形される。そして、予備成形された金属素材１０は絞り成形されて、図４に示されるようにテーパ部を付して太径部１２と小径部１３に成形されると同時に、パンチにより上下面を半抜きの凹部１４に成形する。次の工程で、図５に示されるように、太径部１２の下半部に深縦溝の平目ローレット２を成形する。
【０００８】
そして、図６に示されるように、半抜きの凹部１４をパンチで打抜き中心孔１ａを金属素材１０の中心に形成する。さらに、図７に示されるように、型内の金属素材１０の小径部１３をパンチで圧潰成形し、小径部１３の外径を太径部１２の外径と等しい拡径部１５とすると同時に、前記平目ローレット２の深縦溝に続く環状凹溝３を成形し、製品とするものである。また、平目ローレット２成形時に下方にローレット山が盛り上げられていてもその盛り上げは環状凹溝３に逃がすことができるので、外径寸法に誤差が生じるという問題は生じないものである。
【０００９】
【発明の効果】
本発明は前記説明によって明らかなように、円筒体の平目ローレットと環状凹溝とを圧造成形により成形したものであるから、全てを圧造成形機により圧造することができ、従来のように旋盤やローレット切り機等による別工程の機械加工を必要としないので、効率よく生産をすることができる。
従って、本発明は従来の問題点を解決したインサート用金具の製造法として、業界の発展に寄与するところ大なものである。
【図面の簡単な説明】
【図１】 本発明により製造されたインサート用金具を示す正面図である。
【図２】 本発明の一定寸法に切断された金属素材の正面図である。
【図３】 本発明の先細に予備成形された金属素材の正面図である。
【図４】 本発明の下半部を小径部に成形され、上下面に半抜きの凹部が成形された金属素材の正面図である。
【図５】 本発明の外周面に平目ローレットが成形された金属素材の正面図である。
【図６】 本発明の中心孔が成形された金属素材の正面図である。
【図７】 本発明の小径部が圧潰成形されると同時に、環状凹溝が成形された金属素材の正面図である。
【図８】 従来の環状の凹溝が形成されたインサート用金具の正面図である。
【図９】 従来のローレットが形成されたインサート用金具の正面図である。
【符号の説明】
１ 円筒体
1a 中心孔
２ 平目ローレット
３ 環状凹溝
10 金属素材
11 先細
12 太径部
13 小径部
14 凹部
15 拡径部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to heading molded article production method for metal tool inserts are inserted into the resin product.
[0002]
[Prior art]
Conventionally, insert metal fittings inserted into resin products are shown in FIG. 8 in order to prevent dropping or rattling due to the load applied to other members attached to the metal fitting for insert after resin molding. As shown in FIG. 9, the annular groove 30 is cut on the outer peripheral surface, the spiral groove is cut with a lathe, or the knurling 31 is formed on the outer peripheral surface of the insert fitting as shown in FIG. I cut it. However, such processing is performed by a machine in a separate process, and there is a problem that productivity is lowered. For this reason, only one of the retaining groove or the non-rotating groove is formed depending on the direction of the load that is applied to the other member mounted on the insert metal fitting, thereby reducing the number of steps. As a result, in the case where the groove for preventing slipping is provided, although it is a small force, there is a problem that if it continues to receive a load for a long time in the direction of rotation prevention, it will turn. In the provided one, although it was a small force, there was a problem that it dropped out if it continued to receive a load for a long time in the retaining direction. Further, with respect to both the load of retaining and preventing rotation, a knurled knurling was formed by a knurling machine so as to withstand loads in both directions. However, referred to in terms of the twill lines of the knurled groove becomes shallower by knurling machine, for Iris, is insufficient when a large load is applied, ye may occur, and falling off in the worst case, There was a problem.
[0003]
[Problems to be solved by the invention]
What the invention is aimed at providing a method for producing metal insert which can be produced only in heading without performing other machining inserts for metal tools to withstand the load of both retaining the detent It is.
[0004]
[Means for Solving the Problems]
In order to achieve the above-mentioned purpose, a metal material made of a short column having a certain size is preliminarily formed by a forging machine, and the outer peripheral surface of the metal material is drawn by a forging machine to obtain a large diameter. And forming a concave portion on the upper and lower surfaces of the metal material, and further forming a flat knurled deep deep groove in the lower half of the large diameter portion of the metal material by a forging machine, The recess is drilled, and then the small-diameter portion of the perforated metal material formed with flat knurling is crushed by a forging machine to make the small-diameter portion an enlarged portion having the same diameter as the large-diameter portion. is a method for producing metal insert molded annular groove in the flatfish knurling of the bottom edge that the invention of claim 1.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the insert fitting manufactured according to the present invention has the same outer diameter as that of the cylindrical body 1 in the middle portion of the outer peripheral surface of the metal cylindrical body 1 through which the central hole 1a for mounting other members is inserted . is flounder knurled 2 formation Fukatatemizo, the lower edge of the flat first knurling 2, annular groove in which the cross-sectional shape with an opening Following the deep longitudinal groove in the flounder knurl 2 is expanded and substantially V-shaped It will be formed .
[0006]
In such an insert fitting , when the cylindrical body 1 is mounted on either a male or male molding die, and the mold is clamped and resin molding is performed, the resin flows into the peripheral edge of the cylindrical body 1, and the depth of the flat knurled 2 is increased. The grooves and the annular grooves 3 are filled with resin and hardened, and the cylindrical body 1 is firmly integrated by the solidified resin in the annular grooves 3 following the deep vertical grooves of the flat knurled 2. Then, if the center hole 1a of the cylindrical body 1 inserted into the resin molded product is used as a sleeve and the shaft of the other member device is inserted and used, the load in the vertical direction applied to the shaft of the other member is the annular groove 3 is securely held by, fastened securely is prevented. Further, the rotational load applied to the shaft is held by the deep vertical groove flat knurled 2 and the annular groove 3 has a substantially V-shaped cross section, so that the resin flow is good during molding and the flat knurled. Since it is connected to the deep vertical groove 2, there is no possibility that the resin breaks even if a large load is applied to the cylindrical body 1, and the cylindrical body 1 does not cause rattling over a long period of time.
[0007]
Next, the manufacturing method of the insert metal fitting of this invention is demonstrated in detail based on FIGS.
Reference numeral 10 denotes a short columnar metal material obtained by cutting a steel bar to a certain size, and the tip portion of the metal material 10 is pre-formed into a taper 11 as shown in FIG. Then, the preformed metal material 10 is drawn and formed into a large-diameter portion 12 and a small-diameter portion 13 with a tapered portion as shown in FIG. Is formed into a recess 14. In the next step, as shown in FIG. 5, a deep vertical groove flat knurled 2 is formed in the lower half of the large diameter portion 12.
[0008]
Then, as shown in FIG. 6, the half-cut recess 14 is punched to form the center hole 1 a at the center of the metal material 10. Furthermore, as shown in FIG. 7, the small diameter portion 13 of the metal material 10 in the mold is crushed with a punch so that the outer diameter of the small diameter portion 13 is the enlarged diameter portion 15 equal to the outer diameter of the large diameter portion 12. The annular concave groove 3 following the deep vertical groove of the flat knurled 2 is formed into a product. Further, even if a knurl mountain is raised downward when forming the flat knurled 2, the raised can be released to the annular groove 3, so that there is no problem that an error occurs in the outer diameter.
[0009]
【The invention's effect】
The present invention as evidenced by the description, because the flatfish knurled annular groove of the circular cylindrical body is obtained by molding by forging molding, it is possible to heading all by forging molding machine, as in the conventional lathes In addition, since it is not necessary to perform machining in a separate process using a knurling machine or the like, production can be performed efficiently.
Accordingly, the present invention is a manufacturing method of the conventional problems to solve the gold insert tool is large ones place to contribute to the development of the industry.
[Brief description of the drawings]
1 is a front view showing the insert for metal fitting made in accordance with the present invention.
FIG. 2 is a front view of a metal material cut to a certain size according to the present invention.
FIG. 3 is a front view of a tapered and preformed metal material of the present invention.
FIG. 4 is a front view of a metal material in which the lower half of the present invention is formed into a small-diameter portion and the upper and lower surfaces are formed with half-cut recesses.
FIG. 5 is a front view of a metal material having a flat knurled shape formed on the outer peripheral surface of the present invention.
FIG. 6 is a front view of a metal material formed with a center hole according to the present invention.
FIG. 7 is a front view of a metal material in which an annular groove is formed at the same time that a small diameter portion of the present invention is formed by crushing.
FIG. 8 is a front view of a metal fitting for insert in which a conventional annular groove is formed.
FIG. 9 is a front view of a metal fitting for insert in which a conventional knurl is formed.
[Explanation of symbols]
1 Cylindrical body
1a Center hole 2 Flat knurled 3 Annular groove
10 Metal material
11 Tapered
12 Large diameter part
13 Small diameter part
14 Recess
15 Expanded part

Claims (1)

一定寸法の短柱状よりなる金属素材の先方部を圧造成形機により若干先細に予備成形したうえ、該金属素材の外周面を圧造成形機により絞り成形して太径部と小径部に成形し、また、金属素材の上下面に凹部を成形し、さらに、圧造成形機により金属素材の太径部の下半部に深縦溝の平目ローレットを成形したうえ、前記凹部に孔開け加工を施し、次に、平目ローレットが形成された孔開きの金属素材の小径部を圧造成形機により圧潰成形して、小径部を太径部と同径の拡径部とするとともに、平目ローレットの下端縁に環状凹溝を成形することを特徴とするインサート用金具の製造法。The tip of the metal material consisting of a short columnar shape of a certain size is pre-shaped slightly by a forging machine, and the outer peripheral surface of the metal material is drawn by a forging machine to form a large diameter part and a small diameter part, In addition, a concave part is formed on the upper and lower surfaces of the metal material, and further, a flat knurled groove with a deep vertical groove is formed on the lower half of the large-diameter part of the metal material by a forging machine, and a hole is formed in the concave part. Next, the small-diameter portion of the perforated metal material on which the flat knurled is formed is crushed by a forging machine to make the small-diameter portion the same diameter as the large-diameter portion, and at the lower end edge of the flat knurled A method for manufacturing an insert metal fitting, characterized by forming an annular groove.
JP97796A 1996-01-08 1996-01-08 Manufacturing method for metal fittings for inserts Expired - Fee Related JP3642859B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP97796A JP3642859B2 (en) 1996-01-08 1996-01-08 Manufacturing method for metal fittings for inserts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP97796A JP3642859B2 (en) 1996-01-08 1996-01-08 Manufacturing method for metal fittings for inserts

Publications (2)

Publication Number Publication Date
JPH09187832A JPH09187832A (en) 1997-07-22
JP3642859B2 true JP3642859B2 (en) 2005-04-27

Family

ID=11488682

Family Applications (1)

Application Number Title Priority Date Filing Date
JP97796A Expired - Fee Related JP3642859B2 (en) 1996-01-08 1996-01-08 Manufacturing method for metal fittings for inserts

Country Status (1)

Country Link
JP (1) JP3642859B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4936148B2 (en) * 2008-10-24 2012-05-23 株式会社阪村エンジニアリング Insert metal fitting and manufacturing method thereof
JP5863271B2 (en) * 2011-04-27 2016-02-16 ボロフ、オタリュ、ソシエテ、アノニムＢｏｌｌｈｏｆｆ Ｏｔａｌｕ Ｓ．Ａ． Inserted threaded insert and insert molding method
JP5860745B2 (en) * 2012-03-29 2016-02-16 住友理工株式会社 Cylindrical vibration isolator and method for manufacturing the same

Also Published As

Publication number Publication date
JPH09187832A (en) 1997-07-22

Similar Documents

Publication Publication Date Title
JP3642859B2 (en) Manufacturing method for metal fittings for inserts
CN110538953B (en) Cold heading one-step forming process for automotive multi-step bushing
KR940007169B1 (en) Drill screw
KR20090005565A (en) Non-cutting type metal insert bush, apparatus and method for manufacturing the insert bush
KR930008590B1 (en) Manufacturing process for end fitting for eye joint
EP0277269B1 (en) Process for manufacturing a part having a tooth profile and boss
CA1150670A (en) Closed chamber extrusion method and apparatus for shaping of metal rod into tulip-shaped part
JPH11169999A (en) Die device for forging
JP3775072B2 (en) Manufacturing method of shaft
JP3085571B2 (en) Manufacturing method of bevel gear and sizing mold thereof
JP2847024B2 (en) Forging die for stepped parts and method for forging stepped parts
US3176329A (en) Method of making partially hollow rivets and similar articles
JPH07144244A (en) Forging die and forging method of forging gear
CN214133790U (en) Forging and pressing die for high-speed titanium alloy impeller blank
KR100865476B1 (en) Manufacturing method of Metal insert
JP3750906B2 (en) Manufacturing method for headed parts
CN210676746U (en) Cold heading forming device of brake adjusting shaft sleeve
JP4469447B2 (en) Steel wheel decorative hole punching method
JP4962886B2 (en) Manufacturing method for parts and washers
JPH1190735A (en) Molding method for forging die of bevel gear
JP2847028B2 (en) Forging method of gear with shaft
JPS602134B2 (en) Punching hole processing method and device
JPH11104782A (en) Forging method of cylindrical housing with peripheral flange
JPH0890140A (en) Manufacture of parts having undercut
EP1389571A1 (en) Method for manufacturing a master cylinder for a brake system, and cylinder manufactured therewith

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20041028

A131 Notification of reasons for refusal

Effective date: 20041102

Free format text: JAPANESE INTERMEDIATE CODE: A131

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20041224

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050121

A61 First payment of annual fees (during grant procedure)

Effective date: 20050126

Free format text: JAPANESE INTERMEDIATE CODE: A61

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080204

Year of fee payment: 3

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110204

Year of fee payment: 6

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140204

Year of fee payment: 9

LAPS Cancellation because of no payment of annual fees