JPH0390243A - Manufacture of main body fixture - Google Patents
Manufacture of main body fixtureInfo
- Publication number
- JPH0390243A JPH0390243A JP10822790A JP10822790A JPH0390243A JP H0390243 A JPH0390243 A JP H0390243A JP 10822790 A JP10822790 A JP 10822790A JP 10822790 A JP10822790 A JP 10822790A JP H0390243 A JPH0390243 A JP H0390243A
- Authority
- JP
- Japan
- Prior art keywords
- die
- recess
- section
- extrusion molding
- metal shell
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title description 27
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 abstract description 28
- 238000001816 cooling Methods 0.000 abstract description 20
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 description 70
- 239000002184 metal Substances 0.000 description 39
- 229910052751 metal Inorganic materials 0.000 description 39
- 238000000641 cold extrusion Methods 0.000 description 34
- 238000009415 formwork Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000012212 insulator Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010959 steel 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.
従来より、例えば、ある種のガソリンエンジンにおいて
は、シリンダヘッドに形成された凹所に、胴体の中央部
より上方側の径が小さい六角形状の主体金具を有する点
火栓を取付けている。Conventionally, for example, in certain types of gasoline engines, an ignition plug having a hexagonal metal shell with a smaller diameter above the center of the body is mounted in a recess formed in a cylinder head.
このような形状の点火栓の主体金具くヨーロッパ特許第
００３６０５０号）は、押出し成形によって、胴体の中
央部より一方側に中央部の径より小さい径で断面が六角
形状の筒状部を形成する前工程と、押出し成形によって
、前工程により形成された胴体を軸方向に貫通する軸穴
を形成する後工程とを備えた製造方法により製造されて
いる。The main metal fitting of a spark plug having such a shape (European Patent No. 0036050) is formed by extrusion molding to form a cylindrical part with a hexagonal cross section and a diameter smaller than the diameter of the center part on one side of the center part of the body. It is manufactured by a manufacturing method that includes a pre-process and a post-process of forming, by extrusion molding, a shaft hole that axially passes through the body formed in the pre-process.
なお、前工程は、第１８図および第１９図に示すように
、パンチ２１０によって、胴体２００の一方側の凹所２
０１がマンドレル２２０と六角形状の内周穴２３１付ダ
イ２３０との間隙２２１内へ前方押出しされる。このと
き、胴体２００の一方側の筒状部２０２は、胴体２００
の軸方向に延伸され、六角部２０３を有する筒状部２０
２となる。また、従来より、胴体２００の内周面とマン
ドレル２２０の外周面との間には、過度の摩擦熱が発生
するため、冷却用エアーおよび冷却オイルを胴体２００
の一方側の凹所２０１内に供給して過度の摩擦熱の発生
を防止している。In addition, in the pre-process, as shown in FIGS. 18 and 19, a recess 2 on one side of the body 200 is punched using a punch 210.
01 is extruded forward into the gap 221 between the mandrel 220 and the die 230 with a hexagonal inner peripheral hole 231. At this time, the cylindrical portion 202 on one side of the body 200
A cylindrical portion 20 extending in the axial direction and having a hexagonal portion 203
It becomes 2. Conventionally, excessive frictional heat is generated between the inner circumferential surface of the body 200 and the outer circumferential surface of the mandrel 220.
is supplied into the recess 201 on one side of the recess 201 to prevent excessive frictional heat from being generated.
［発明が解決しようとする課題］
しかるに、前述の従来の製造方法においては、軸穴成形
を六角成形の後に行っているので、胴体２００の凹所２
０１内にマンドレル２２０を挿入した際に、筒状部２０
２がグイ２３０によって絞られるため、冷却用エアーお
よび冷却オイルが凹所２０１の外部への排出が容易に行
われないという課題があった。[Problems to be Solved by the Invention] However, in the conventional manufacturing method described above, since the shaft hole forming is performed after the hexagonal forming, the recess 2 of the body 200 is
When the mandrel 220 is inserted into the 01, the cylindrical part 20
2 is squeezed by the gouer 230, there is a problem in that the cooling air and cooling oil cannot be easily discharged to the outside of the recess 201.
このため、胴体２００には、第２０図に示すように、押
出し成形された六角部２０３と胴体２００の境付近（第
１９Ｉ２のＡ−Ａ切断＆りで凹所２０１の内周面の軸方
向に、冷却用エアーおよび冷却オイルの排出流路となる
凹み２０４が形成されてしまうという課題があった。Therefore, as shown in FIG. 20, the fuselage 200 has a section near the boundary between the extruded hexagonal part 203 and the fuselage 200 (in the axial direction of the inner circumferential surface of the recess 201 by cutting & drilling 19I2 A-A). However, there was a problem in that a recess 204 was formed to serve as a discharge flow path for cooling air and cooling oil.
また、点火栓は、主体金具の後端部をかしめることによ
り、主体金具と絶縁体とを組付けている。Further, in the ignition plug, the metal shell and the insulator are assembled by caulking the rear end of the metal shell.
しかるに、このかしめを行った場合には、胴体２００の
凹み２０４によって、主体金具のかしめ溝部にしわが現
われ外観を損ない不良品となっていた。However, when this caulking is performed, wrinkles appear in the caulking groove of the metal shell due to the recess 204 in the body 200, which impairs the appearance and results in a defective product.
本発明は、六角成形時の胴体の凹みの発生を防止する主
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 prevents the occurrence of dents in the body during hexagonal molding.
本発明の主体金具の製造方法は、押出し成形によって、
胴体を軸方向に貫通する軸穴を形成する第１工程と、押
出し成形によって、前記第１工程により形成された胴体
の中央部より一方側に前記中央部の径より小さい径で断
面が六角形状の筒状部を形成する第２工程とを備えた技
術手段を採用した。The method for manufacturing the metal shell of the present invention includes, by extrusion molding,
A first step of forming a shaft hole passing through the body in the axial direction, and extrusion molding to form a hexagonal cross section on one side of the center of the body formed in the first step with a diameter smaller than the diameter of the center. A technical means comprising a second step of forming a cylindrical part was adopted.
［作用］
本発明の主体金具の製造方法は、前記技術手段によりつ
ぎの作用を有する。[Function] The method for manufacturing a metal shell of the present invention has the following effects by the above-mentioned technical means.
第１工程で、胴体を軸方向に貫通する軸穴を押出し成形
することによって、軸穴を宥する筒状の胴体を形成する
。In the first step, a cylindrical body that accommodates the shaft hole is formed by extrusion molding the shaft hole that passes through the body in the axial direction.
第２工程で、第１工程により形成された胴体の中央部よ
り一方側に中央部の径より小さい径で断面が六角形状の
筒状部を押出し成形することによって、断面が六角形状
の筒状部を有する筒状の銅体を形成する。In the second step, a cylindrical portion with a hexagonal cross section and a diameter smaller than the diameter of the center portion is extruded on one side of the center of the body formed in the first step. A cylindrical copper body having a section is formed.
このように、第１工程の後に第２工程を行うことによっ
て、胴体の軸穴内にパンチやマンドレル等の棒状部材を
挿入した際に、筒状部が絞られても、筒状部の内周部分
から冷却用エアーおよび冷却オイルがパンチやマンドレ
ル等の棒状部材により塞がれていない軸穴の部分に集合
する。In this way, by performing the second step after the first step, even if the cylindrical portion is squeezed when a rod-shaped member such as a punch or mandrel is inserted into the shaft hole of the body, the inner periphery of the cylindrical portion is Cooling air and cooling oil are collected in a portion of the shaft hole that is not blocked by a rod-shaped member such as a punch or mandrel.
［発明の効果］
本発明の主体金具の製造方法は、前記技術手段および作
用によりつぎの効果を奏する。[Effects of the Invention] The method for manufacturing a metal shell of the present invention achieves the following effects through the technical means and operations described above.
胴体の内周面に、冷却用エアーおよび冷却オイルの排出
流路となる凹みの発生を防止できる。It is possible to prevent the formation of depressions on the inner circumferential surface of the body that serve as exhaust channels for cooling air and cooling oil.
また、例えば、本発明の主体金具の製造方法を点火栓用
主体金具の製造方法に採用した場合には、主体金具の後
端部をかしめて主体金具と絶縁体とを組付けても、第１
５５！ｌに示すように、主体金具のかしめ溝部１２５の
外周にしわが生起することを防止できる。For example, when the method for manufacturing a metal shell of the present invention is adopted as a method for manufacturing a metal shell for a spark plug, even if the metal shell and the insulator are assembled by caulking the rear end of the metal shell, the 1
55! As shown in FIG. 1, it is possible to prevent wrinkles from forming on the outer periphery of the caulking groove portion 125 of the metal shell.
［実施例］
本発明の主体金具の製造方法を第１５！ｌないし第１７
図に示す実施例に基づき説明する。[Example] The method for manufacturing the metal shell of the present invention is described in the 15th example! l to 17th
Description will be made based on the embodiment shown in the figures.
第１図ないし第１５図は本発明の第１実施例を表す。1 to 15 represent a first embodiment of the present invention.
第１図ないし第７図は各成形部における胴体の成形形状
を示し、第８図ないし第１３図は点火栓用主体金具の製
造方法により胴体を成形する冷間押出し成形機の各成形
部を示す。Figures 1 to 7 show the molded shape of the fuselage in each molding section, and Figures 8 to 13 show each molding part of a cold extrusion molding machine that molds the fuselage by the method of manufacturing a metal shell for a spark plug. show.
冷間押出し成形機は、直線状に配置された第１〜第６戒
形部１．２．３．４．５．６および移送手段（図示せず
）を備える。The cold extrusion molding machine includes first to sixth molding sections 1.2.3.4.5.6 arranged in a straight line and a transfer means (not shown).
第１戒形部１は、第８図に示すように、型枠（グイ）１
１．バンチ１２およびキックアウトピン１３を有し、据
込み成形を行って胴体Ｗ１ （第１図）を形成する。As shown in FIG.
1. It has bunches 12 and kickout pins 13, and is upholstered to form a fuselage W1 (FIG. 1).
第２を形部２は、第９図に示すように、型枠（グイ）２
１、バンチ２２、ピン２３およびキックアウトスリーブ
２４を有し、前方押出し成形を行って胴体Ｗ２ （第
２図）を形成する。なお、本実施例では、第１成形部１
および第２戒形部２によって第３成形部３以降の成形の
ための芯出し成形を行う。As shown in FIG. 9, the second shape part 2 is
1, a bunch 22, a pin 23, and a kickout sleeve 24, and performs front extrusion molding to form a fuselage W2 (FIG. 2). Note that in this embodiment, the first molding section 1
And, the second forming section 2 performs centering forming for forming the third forming section 3 and thereafter.
第３成形部３は、第１０図に示すように、型枠（ダイ）
３１、バンチ３２、バンチホルダー３３、ピン３４およ
びキックアウトスリーブ３５を有し、複合（前方および
後方）押出し成形を行って胴体Ｗ３（第３図）を形成す
る。As shown in FIG. 10, the third molding section 3 includes a mold (die).
31, bunches 32, bunch holders 33, pins 34 and kickout sleeves 35, and undergoes composite (front and rear) extrusion to form the fuselage W3 (FIG. 3).
第４ｅ、形部４は、第１１図に示すように、型枠（ダイ
）４１、バンチ４２、ピン４３およびキックアウトスリ
ーブ４４を有し、小穴成形を行って胴体Ｗ４（第４図〉
を形成する。As shown in FIG. 11, the shape portion 4 e has a formwork (die) 41, bunches 42, pins 43, and kick-out sleeves 44, and is formed by small hole forming to form the body W4 (FIG. 4).
form.
第５成形部５は、第１２図に示すように、本発明にかか
る第１工程を行う成形手段であって、型枠（ダイ）５１
．バンチ５２、キックアウトスリーブ５３および切れ端
排出部５４を有し、軸穴を貫通させて胴体Ｗ５ （第
５図）を形成する。As shown in FIG. 12, the fifth molding section 5 is a molding means for performing the first step according to the present invention, and includes a mold (die) 51.
．． It has a bunch 52, a kickout sleeve 53, and a scrap discharge part 54, and is passed through the shaft hole to form a body W5 (FIG. 5).
第６を形部６は、第１３図に示すように、本発明にかか
る第２工程を行う成形手段であって、型枠（ダイ〉６１
、バンチ６２、バンチキックアウトスリーブ６３、パン
チアウタスリーブ８４、マンドレル６５およびキックア
ウトスリーブ６６を有し、六角成形を行って胴体Ｗ６
（第６図および第７図〉を形成する。As shown in FIG. 13, the sixth forming section 6 is a forming means for carrying out the second step according to the present invention, and is a forming section (die) 61.
, a bunch 62, a bunch kickout sleeve 63, a punch outer sleeve 84, a mandrel 65, and a kickout sleeve 66, and is hexagonally formed to form a fuselage W6.
(Figures 6 and 7) are formed.
そ七て、各ダイ１１．２１．３１．４１．５１．６１は
、冷間押出し成形機の固定部材ａに一体的に組込まれて
いる。また、各バンチ１２．２２．３２．４２．５２．
６２は、冷間押出し成形機の可動部材に一体的に組込ま
れている。Seventh, each die 11.21.31.41.51.61 is integrally incorporated into the fixed member a of the cold extrusion molding machine. Also, each bunch 12.22.32.42.52.
62 is integrally incorporated into the movable member of the cold extrusion molding machine.
なお、各ダイ１１．２１．３１．４１．５１．６１の凹
所内、および各バンチ１２．２２．３２．４２．５２．
８２と胴体との間には、接触面を冷却するために、常時
冷却用エアーおよび冷却オイルが供給手段（図示せず）
により供給されている。Note that inside the recess of each die 11.21.31.41.51.61 and in each bunch 12.22.32.42.52.
82 and the body, there is a means (not shown) for constantly supplying cooling air and cooling oil to cool the contact surface.
Powered by.
移送手段は、胴体を掴持するフィンガーなどを有し、前
工程の成形部のダイから後工程の成形部のダイに胴体を
移送するものである。The transfer means has fingers or the like for gripping the body, and is used to transfer the body from the die of the molding section in the previous step to the die of the molding section in the subsequent step.
本実施例の点火社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。The method of manufacturing the main metal fitting for ignition according to this embodiment will be explained based on FIGS. 1 to 15.
（イ）スチールから切断された丸棒状胴体（図示せず）
は、移送手段により第１戒形部１のダイ１１の凹所の入
口に反転することなく略平行方向に移送され、このダイ
１１の凹所の入口で保持される。(a) Round rod-shaped body cut from steel (not shown)
is transferred by the transfer means to the entrance of the recess of the die 11 of the first preform part 1 in a substantially parallel direction without being reversed, and is held at the entrance of the recess of the die 11.
冷間押出し成形機の可動部材が固定部材ａに向かって図
示下方に移動することによって、バンチ１２が丸棒状胴
体をダイ１１の凹所内に圧入する。As the movable member of the cold extrusion molding machine moves downward in the figure toward the fixed member a, the bunch 12 press-fits the round rod-shaped body into the recess of the die 11.
ダイ１１の凹所内に圧入された丸棒状胴体には、第１戒
形部１において、ダイ１１によって円弧状のコーナ１０
１が形成され、バンチ１２の先端部およびキックアウト
ピン１３の先端部によって、両端面の軸心上に芯出し小
穴１０２．１０３が形成される。よって、第１戒形部１
においては、前述のような冷間据込み成形により、第１
図に示す胴体Ｗ１が形成される。The round rod-shaped body press-fitted into the recess of the die 11 has an arc-shaped corner 10 formed by the die 11 in the first preform portion 1.
1 is formed, and centering small holes 102 and 103 are formed on the axes of both end surfaces by the tip of the bunch 12 and the tip of the kickout pin 13. Therefore, the first commandment part 1
In this case, the first
The fuselage W1 shown in the figure is formed.
冷間押出し成形機の可動部材が固定部材ａから離れて図
示上方に移動することによって、バンチ１２が胴体Ｗ１
から離れる。このとき、キックアウトピン１３により胴
体Ｗ１がダイ１１の凹所内から取出される。As the movable member of the cold extrusion molding machine moves away from the fixed member a and moves upward in the figure, the bunch 12 moves to the body W1.
move away from At this time, the body W1 is removed from the recess of the die 11 by the kick-out pin 13.
〈口〉つぎに、第１成形部１により形成された胴体Ｗ１
は、移送手段により第１成形部１から第２戒形部２のダ
イ２１の凹所の入口に反転することなく略平行方向に移
送され、このダイ２１の凹所の入口で保持される。<Exposure> Next, the body W1 formed by the first molded part 1
is transferred by the transfer means from the first molding section 1 to the entrance of the recess of the die 21 of the second molding section 2 in a substantially parallel direction without being reversed, and is held at the entrance of the recess of the die 21.
冷間押出し成形機の可動部材が固定部材ａに向かって図
示下方に移動することによって、バンチ２２が胴体Ｗ１
をダイ２１の凹所内に圧入する。As the movable member of the cold extrusion molding machine moves downward in the figure toward the fixed member a, the bunch 22 moves to the body W1.
is press-fitted into the recess of the die 21.
ダイ２１の凹所内に圧入された胴体Ｗ１には、第２６、
形部２において、ダイ２１によって径の大きい部分１０
４および径の小さい部分１０５が形成され、バンチ２２
の先端部およびピン２３の先端部によって、両端面の軸
心上に芯出し大穴１０６．１０７が形成される。よって
、第２戒形部２においては、前述のような冷間押出し成
形により、第２図に示す胴体Ｗ２が形成される。The body W1 press-fitted into the recess of the die 21 has a 26th,
In the shaped portion 2, the large diameter portion 10 is formed by the die 21.
4 and a small diameter portion 105 are formed, and the bunch 22
Centering large holes 106 and 107 are formed on the axes of both end faces by the tip of the pin 23 and the tip of the pin 23 . Therefore, in the second preform portion 2, the body W2 shown in FIG. 2 is formed by cold extrusion as described above.
冷間押出し成形機の可動部材が固定部材ａから離れて図
示上方に移動することによって、バンチ２２が胴体Ｗ２
から離れる。このとき、キックアウトスリーブ２４によ
り胴体Ｗ２がダイ２１の凹所内から取出される。As the movable member of the cold extrusion molding machine moves away from the fixed member a and moves upward in the figure, the bunch 22 moves to the body W2.
move away from At this time, the body W2 is removed from the recess of the die 21 by the kick-out sleeve 24.
（ハ）つぎに、第２成形部２により形成された胴体Ｗ２
は、移送手段により第２戒形部２から第３成形部３のダ
イ３１の凹所の入口に反転することなく略平行方向に移
送され、このダイ３１の凹所の入口で保持される。(c) Next, the fuselage W2 formed by the second molding part 2
is transferred by the transfer means from the second molding section 2 to the entrance of the recess of the die 31 of the third forming section 3 in a substantially parallel direction without being reversed, and is held at the entrance of the recess of the die 31.
冷間押出し成形機の可動部材が固定部材ａに向かって図
示下方に移動することによって、バンチ３２が胴体Ｗ２
をダイ３１の凹所内に圧入する。As the movable member of the cold extrusion molding machine moves downward in the figure toward the fixed member a, the bunch 32 moves to the body W2.
is press-fitted into the recess of the die 31.
ダイ３１の凹所内に圧入された胴体Ｗ２には、第３戒形
部３において、ダイ３１によって胴体Ｗ２の一方側に他
部１０８より小さい径で断面が円形状の第１筒状部１０
９が形成される。また、バンチ３２の先端部およびピン
３４の先端部によって、両端面の軸心上に穴１１０．１
１１が形成される。よって、第３ｔｊ、形部３において
は、前述のような冷間押出し成形により、第３図に示す
胴体Ｗ３が形成される冷間押出し成形機の可動部材が固
定部材ａから離れて図示上方に移動することによって、
バンチ３２が胴体Ｗ３から離れる。このとき、キックア
ウトスリーブ３５により胴体Ｗ３がダイ３１の凹所内か
ら取出される。In the body W2 press-fitted into the recess of the die 31, a first cylindrical part 10 having a circular cross section and a smaller diameter than the other part 108 is attached to one side of the body W2 by the die 31 in the third predetermined part 3.
9 is formed. Also, a hole 110.1 is formed on the axis of both end surfaces by the tip of the bunch 32 and the tip of the pin 34.
11 is formed. Therefore, in the third tj, shape section 3, the movable member of the cold extrusion molding machine that forms the body W3 shown in FIG. By moving
Bunch 32 separates from body W3. At this time, the body W3 is removed from the recess of the die 31 by the kick-out sleeve 35.
（ニ）つぎに、第３成形部３により形成された胴体Ｗ３
は、移送手段により第３戒形部３から第４戒形部４のダ
イ４１の凹所の入口に反転することなく略平行方向に移
送され、このダイ４１の凹所の入口で保持される。(d) Next, the fuselage W3 formed by the third molding section 3
is transferred by the transfer means from the third prescribing section 3 to the entrance of the recess of the die 41 of the fourth prescribing section 4 in a substantially parallel direction without being reversed, and is held at the entrance of the recess of the die 41. .
冷間押出し成形機の可動部材が固定部材ａに向かって図
示下方に移動することによって、バンチ４２が胴体Ｗ３
をダイ４１の凹所内とダイ４１とピン４３との間隙とに
圧入する。As the movable member of the cold extrusion molding machine moves downward in the figure toward the fixed member a, the bunch 42 moves to the body W3.
is press-fitted into the recess of the die 41 and the gap between the die 41 and the pin 43.
ダイ４１の凹所内とダイ４１とピン４３との間隙とに圧
入された胴体Ｗ３には、第４戊形部４において、バンチ
４２によって胴体Ｗ３の一方側の内部に段付き穴１１２
が形成される。よって、第４戒形部４においては、前述
のような冷間押出し成形により、第４図に示す胴体Ｗ４
が形成される。In the body W3 that is press-fitted into the recess of the die 41 and the gap between the die 41 and the pin 43, a stepped hole 112 is formed inside one side of the body W3 by the bunch 42 in the fourth oval part 4.
is formed. Therefore, in the fourth preform part 4, the body W4 shown in FIG. 4 is formed by cold extrusion molding as described above.
is formed.
冷間押出し成形機の可動部材が固定部材ａ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Ｗ４
の図示上端面から離れる。このとき、キックアウトスリ
ーブ４４により胴体Ｗ４がダイ４１の凹所内から取出さ
れる。As the movable member of the cold extrusion molding machine moves away from the fixed member a and moves upward in the figure, the bunch 42 moves to the body W4.
away from the upper end surface shown in the figure. At this time, the body W4 is removed from the recess of the die 41 by the kick-out sleeve 44.
（ホ）つぎに、第４戒形部４により形ｔｊ、された胴体
Ｗ４は、移送手段により第４成形部４から第５戒形部５
のダイ５１の凹所の入口に反転することなく略平行方向
に移送され、このダイ５１の凹所の入口で保持される。(e) Next, the body W4 shaped by the fourth shaping part 4 is transferred from the fourth shaping part 4 to the fifth shaping part 5 by means of a transfer means.
It is transferred to the entrance of the recess of the die 51 in a substantially parallel direction without being reversed, and is held at the entrance of the recess of this die 51.
冷間押出し成形機の可動部材が固定部材ａに向かって図
示下方に移動することによって、バンチ５２が胴体Ｗ４
をダイ５１の凹所内に圧入する。As the movable member of the cold extrusion molding machine moves downward in the figure toward the fixed member a, the bunch 52 moves to the body W4.
is press-fitted into the recess of the die 51.
ダイ５１の凹所内に圧入された胴体Ｗ４には、第５戒形
部５において、バンチ５２によって胴体Ｗ４の内部に胴
体Ｗ４を軸方向に貫通する軸穴１１３が形成される。こ
のとき、排出された切れ端は、切れ端排出部５４を通っ
て外部に排出される。よって、第５戒形部５においては
、前述のような冷間押出し成形により、第５図に示す胴
体Ｗ５が形成される。In the body W4 press-fitted into the recess of the die 51, a shaft hole 113 is formed inside the body W4 by the bunch 52 in the fifth predetermined portion 5, passing through the body W4 in the axial direction. At this time, the discharged scraps are discharged to the outside through the scrap discharge section 54. Therefore, in the fifth preform part 5, the body W5 shown in FIG. 5 is formed by cold extrusion molding as described above.
冷間押出し成形機の可動部材が固定部材ａから離れて図
示上方に移動することによって、バンチ５２が胴体Ｗ５
から離れる。このとき、キックアウトスリーブ５３によ
り胴体Ｗ５がダイ５１の凹所内から取出される。As the movable member of the cold extrusion molding machine moves away from the fixed member a and moves upward in the figure, the bunch 52 moves to the body W5.
move away from At this time, the body W5 is removed from the recess of the die 51 by the kick-out sleeve 53.
（へ）つぎに、第５成形部５により形成された胴体Ｗ５
は、移送手段により第５戒形部５から第６成形部６のダ
イ６１の凹所の入口に上下方向を反転して移送され、こ
のダイ６１の凹所の入口で保持される。(f) Next, the fuselage W5 formed by the fifth molding section 5
is transferred by the transfer means from the fifth molding section 5 to the entrance of the recess of the die 61 of the sixth forming section 6 with its vertical direction reversed, and is held at the entrance of the recess of the die 61.
冷間押出し成形機の可動部材が固定部材ａに向かって図
示下方に移動することによって、バンチ（ピン〉６２が
胴体Ｗ５をダイ６１の凹所内に圧入するとともに、胴体
Ｗ５の他方側がバンチアウタスリーブ６４内に圧入され
る。As the movable member of the cold extrusion molding machine moves downward in the figure toward the fixed member a, the bunch (pin) 62 press-fits the body W5 into the recess of the die 61, and the other side of the body W5 is inserted into the bunch outer sleeve. 64.
ダイ６１の凹所内、およびバンチアウタスリーブ６４内
に圧入された胴体Ｗ５には、第６成形部６において、ダ
イ６１、マンドレル６５およびバンチアウタスリーブ６
４によって胴体Ｗ５の他方側に中央部１１４より小さい
径で断面が六角形状の第２筒状部１１５が形成される。The body W5 press-fitted into the recess of the die 61 and into the bunch outer sleeve 64 includes the die 61, the mandrel 65 and the bunch outer sleeve 6 in the sixth molding section 6.
4, a second cylindrical portion 115 having a smaller diameter than the central portion 114 and a hexagonal cross section is formed on the other side of the body W5.
よって、第６戒形部８においては、前述のような冷間押
出し成形により、第６図に示す胴体Ｗ６が形成される。Therefore, in the sixth predetermined portion 8, the body W6 shown in FIG. 6 is formed by cold extrusion as described above.
冷間押出し成形機の可動部材が固定部材ａがら離れて図
示上方に移動することによって、バンチキックアウトス
リーブ６３により蹴り出され、パンチ６２、パンチキッ
クアウトスリーブ６３及びパンチアウタースリーブ６４
が胴体Ｗ６から離れるやこのとき、キックアウトスリー
ブ６６により胴体Ｗ６がダイ６１の凹所内から取出され
る。When the movable member of the cold extrusion molding machine separates from the fixed member a and moves upward in the figure, it is kicked out by the bunch kickout sleeve 63, and the punch 62, punch kickout sleeve 63, and punch outer sleeve 64
As soon as the body W6 is separated from the body W6, the body W6 is removed from the recess of the die 61 by the kick-out sleeve 66.
以上のように、第５戒形部５による第１工程の後に、第
６戒形部６による第２工程を行うことによって、胴体Ｗ
５の軸穴１１３内にパンチ６２およびマンドレル６５が
挿入された際に、バンチアウタスリーブ６４により第２
筒状部１１５が絞られても、第２筒状部１１５の内周部
分から冷却用エアーおよび冷却オイルが軸穴１１３のパ
ンチ６２およびマンドレル６５により塞がれていない間
隙１１６に集まる。したがって、第２筒状部１１５の内
周部分には、冷却用エアーおよび冷却オイルが存在しな
いので、胴体Ｗ６の第２筒状部１１５の内周面に凹みが
発生することはない。As described above, by performing the second process using the sixth prescribing section 6 after the first process using the fifth prescribing section 5, the body W
When the punch 62 and mandrel 65 are inserted into the shaft hole 113 of No. 5, the second
Even when the cylindrical portion 115 is narrowed, cooling air and cooling oil from the inner peripheral portion of the second cylindrical portion 115 gather in the gap 116 in the shaft hole 113 that is not closed by the punch 62 and the mandrel 65. Therefore, since cooling air and cooling oil are not present in the inner circumferential portion of the second cylindrical portion 115, no dents are generated on the inner circumferential surface of the second cylindrical portion 115 of the body W6.
また、本実施例のように本発明を点火栓用主体金具の製
造方法に採用した場合には、主体金具１００の後端部１
２１をかしめて主体金具１００と絶縁体７２とを組付け
ても、胴体Ｗ６の第２筒状部１１５の内周面に凹みが発
生しないので、第１５図に示すように主体金具１００の
後端部１２１をがしめた場合にかしめ溝部１２５の外周
にしわが生起することを防止できる。Further, when the present invention is adopted as a method for manufacturing a metal shell for a spark plug as in this embodiment, the rear end portion 1 of the metal shell 100 is
Even if the metal shell 100 and the insulator 72 are assembled by caulking the metal shell 100 and the insulator 72, no dent is generated on the inner peripheral surface of the second cylindrical portion 115 of the fuselage W6. It is possible to prevent wrinkles from forming on the outer periphery of the caulking groove portion 125 when the end portion 121 is caulked.
なお、パンチキックアウトスリーブ６３内に挿入された
パンチ６２はなくても加工可能であり、この場合、間＠
１１６はより大きく、冷却用エアーおよび冷却オイル
がパンチキックアウトスリーブ６３の穴から逃がすこと
ができるため、第２筒状部１１５の円周面に生じる凹み
を有利に防止することができる。Note that processing can be performed without the punch 62 inserted into the punch kickout sleeve 63, and in this case, the
116 is larger and allows cooling air and cooling oil to escape through the holes in the punch-kickout sleeve 63, thereby advantageously preventing dents from occurring on the circumferential surface of the second cylindrical portion 115.
（ト）前述のような押出し成形によって形成された胴体
Ｗ６は、第１４図に示すように、第１ｆＷＪ状部１０９
の外周におねじ１２２が形成され、さらに第２ＦＪ状部
１１５を切削加工により六角部１２３より径の小さい円
形部１２４、かしめ溝部１２５が形成され、主体金具１
００が製造される。そして、この主体金具１００の先端
には、任意の形状の外側電極１２６が溶接等の接合方法
により取付けられる。(g) The body W6 formed by extrusion molding as described above has a 1f WJ-shaped portion 109 as shown in FIG.
A thread 122 is formed on the outer periphery of the metal shell 1, and a circular part 124 having a smaller diameter than the hexagonal part 123 and a caulking groove part 125 are formed by cutting the second FJ-shaped part 115.
00 is manufactured. An outer electrode 126 having an arbitrary shape is attached to the tip of the metal shell 100 by a joining method such as welding.
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１００の内部に、中心電極７１、絶縁体１２などを一
体的に組付けることによって、第１５図に示すような、
ガソリンエンジンのシリンダヘッドの外壁に形成された
凹所に取付けられる点火栓７が製造される。Then, by integrally assembling the center electrode 71, insulator 12, etc. inside the metal shell 100 manufactured by the above manufacturing method, as shown in FIG.
An ignition plug 7 is manufactured to be attached to a recess formed in the outer wall of a cylinder head of a gasoline engine.
第１６図は本発明の第２実施例を表し、点火栓用主体金
具の製造方法により胴体を成形する冷間押出し成形機の
第６戒形部を示す。FIG. 16 represents a second embodiment of the present invention, and shows a sixth molding section of a cold extrusion molding machine for molding a body by the method of manufacturing a metal shell for a spark plug.
〈第１実施例と同−機能物は同番号を付す〉本実施例の
冷間押出し成形機の第６成形？ｉ８は、型枠（第１のダ
イ）８１、マンドレル８２、キックアウトスリーブ８３
、パンチアウタスリーブ（第２のダイ）８４、ビン８５
、ピンキックアウトスリーブ８６およびピンアウタスリ
ーブ８７を有する。<Same as the first embodiment - Functional objects are given the same numbers.> Sixth molding of the cold extrusion molding machine of this example? i8 includes a formwork (first die) 81, a mandrel 82, and a kickout sleeve 83.
, punch outer sleeve (second die) 84, bin 85
, a pin kickout sleeve 86 and a pin outer sleeve 87.
本実施例では、第１実施例と同一の効果に加えて、第１
２図の第５成形部５で形成された胴体Ｗ５を反転するこ
となく平行方向に第６ｔｃ形部８に移送することによっ
て、胴体Ｗ５の端部付近と第６を形部８の第２のダイ８
４の凹所付近との衝突が防止できるので、胴体の端部付
近または第２のダイ８４の凹所付近の損傷を防止できる
。In this embodiment, in addition to the same effects as the first embodiment, the first
By transferring the body W5 formed in the fifth forming part 5 in FIG. die 8
Since collision with the vicinity of the recess of the second die 84 can be prevented, damage to the vicinity of the end of the body or the vicinity of the recess of the second die 84 can be prevented.
さらに、例えば、第５戚形部５の型枠（ダイ〉５１から
第６成形部８の第２のダイ８４に高速で胴体Ｗ５を移送
した場合でも、反転による遠心力が作用しないため胴体
Ｗ５が外方に飛ばされてしまう可能性が全くない、この
ため、胴体Ｗ５の移送速度の高速化が可能となるので、
主体金具１００の生産性を向上することができる。Further, for example, even if the body W5 is transferred from the formwork (die) 51 of the fifth molding section 5 to the second die 84 of the sixth molding section 8 at high speed, the centrifugal force due to reversal does not act, so the body W5 There is no possibility that the fuselage W5 will be blown away. Therefore, the transfer speed of the fuselage W5 can be increased.
The productivity of the metal shell 100 can be improved.
第１７ｒＳＪは本発明の第３実施例を表し、点火栓用主
体金具の製造方法により胴体を成形する冷間押出し成形
機の第６戒形部を示す。No. 17rSJ represents a third embodiment of the present invention, and shows a sixth molding section of a cold extrusion molding machine for molding a body by a method for manufacturing a metal shell for a spark plug.
（第１実施例と同−機能物は同番号を付す）本実施例の
冷間押出し成形機の第６戒形部９は、型枠（第１のダイ
〉９１、マンドレル９２、キックアウトスリーブ９３、
バンチアウタスリーブ（第２のダイ）９４、ビシ９５、
ビンキックアウトスリーブ９６およびビンアウタスリー
ブ９７を有する。(Same as the first embodiment - the same functional parts are given the same numbers) The sixth molding section 9 of the cold extrusion molding machine of this embodiment consists of a formwork (first die> 91, mandrel 92, kickout sleeve 93,
Bunch outer sleeve (second die) 94, bisher 95,
It has a bin kickout sleeve 96 and a bin outer sleeve 97.
本実施例では、第２実施例と同一の効果に加えて、冷間
押出し成形の際に型枠９１内にピンアウタスリーブ９７
の先端が入り込んでいる。このため、胴体Ｗ６の外周面
が型枠９１の図示下端面とバンチアウタスリーブ９４の
図示上端面との隙間９８に面していない、したがって、
冷間押出し成形により第２筒上部１１５が絞られる際に
、胴体Ｗ６の中央部１１４の外周から胴体Ｗ６の一部が
前述の隙間９８に流出しない、すなわち、冷間押出し成
形機の第６戒形部９により冷間押出し成形された胴体Ｗ
６の外周にパリが発生しない。In this embodiment, in addition to the same effects as the second embodiment, a pin outer sleeve 97 is inserted into the formwork 91 during cold extrusion molding.
The tip of the is inserted. Therefore, the outer peripheral surface of the body W6 does not face the gap 98 between the illustrated lower end surface of the formwork 91 and the illustrated upper end surface of the bunch outer sleeve 94.
When the second cylinder upper part 115 is squeezed by cold extrusion, a part of the body W6 does not flow out from the outer periphery of the center part 114 of the body W6 into the above-mentioned gap 98, that is, the sixth commandment of the cold extrusion molding machine. Body W formed by cold extrusion with shape part 9
No paris occurs on the outer periphery of 6.
なお、第１６図のピン８５および第１７図のピン９５は
間隙１１６をより大きくする必要から、ピン８５．９５
を第１３図のパンチ６２と同様に省略することによって
、不具合を解消することができる。Note that the pin 85 in FIG. 16 and the pin 95 in FIG.
By omitting the punch 62 in the same way as the punch 62 in FIG. 13, the problem can be solved.
く変形例）
本実施例では、第６戒形部において胴体に六角形状の第
２筒状部を形成したが、軸穴を形成した後であればいつ
でも胴体に六角形状の第２筒状部を形成することができ
る。すなわち、第１工程と第２工程とを備えた製造方法
で主体金具を製造する冷間押出し成形機であれば本実施
例の冷間押出し成形機に限定されない。(Modified example) In this example, the hexagonal second cylindrical part is formed on the body in the sixth precept, but the hexagonal second cylindrical part can be formed on the body at any time after the shaft hole is formed. can be formed. That is, the cold extrusion molding machine is not limited to the cold extrusion molding machine of this embodiment as long as it is a cold extrusion molding machine that manufactures a metal shell using a manufacturing method that includes a first step and a second step.
本実施例では、第１工程と第２工程との間で同一方向か
ら押出し成形を行ったが、第１工程と第２工程との間で
逆方向から押出し成形を行っても良い。In this example, extrusion molding was performed from the same direction between the first step and the second step, but extrusion molding may be performed from the opposite direction between the first step and the second step.
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中央部、第２筒状
部および軸穴を有する主体金具の製造方法に採用しても
良い。In this embodiment, the present invention was adopted as a method for manufacturing a main metal fitting for a spark plug. The present invention may be employed in a method of manufacturing a metal shell having a second cylindrical portion and a shaft hole.
第１図ないし第１５図は本発明の第１実施例を表す、第
１図ないし第６図は各成形部における胴体の成形形状を
示す断面図、第７図は第６図の下視図、第８ｔ！ｌない
し第１３図は点火栓用主体金具の製造方法により胴体を
成形する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１
５図は点火栓を示す半断面図である。
第１６図は本発明の第２実施例を表し、点火栓用主体金
具の製造方法により胴体を成形する冷間押出し成形機の
第６成形部を示す断面図である。
第１７５１１は本発明の第３実施例を表し、点火栓用主
体金具の製造方法により胴体を成形する冷間押出し成形
機の第６戒形部を示す断面図である。
第１８図および第１９図は従来の製造方法により胴体を
成形する成形機を示す断面図、第２０図は第１９図のＡ
−Ａ切断による凹みが形成された胴体を示す断面図であ
る。
図中
１・・・第１成形部 ２・・・第２戒形部 ３・・・第
３戒形部 ４・・・第４＃：形部 ５・・・第５戒形部
（第１工程を行う成形部） ６．８．９・・・第６成
形部（第２工程を行う成形部〉 ７・・・点火栓 １
０Ｇ・・・主体金具 １１３・・・軸穴 １１４・・・
中央部 １１５・・・第２情状部（筒状部） Ｗｌ、
Ｗ２、Ｗ３、Ｗ４．Ｗ５、Ｗ６・・・胴体1 to 15 show a first embodiment of the present invention, FIGS. 1 to 6 are cross-sectional views showing the molded shape of the fuselage at each molding part, and FIG. 7 is a bottom view of FIG. 6. , 8th t! 1 to 13 are cross-sectional views showing each forming part of a cold extrusion molding machine for forming a body by a method of manufacturing a metal shell for a spark plug. Fig. 14 is a half-sectional view showing the main metal fitting for the ignition plug;
FIG. 5 is a half sectional view showing the ignition plug. FIG. 16 represents a second embodiment of the present invention, and is a cross-sectional view showing a sixth molding section of a cold extrusion molding machine for molding a body by a method of manufacturing a metal shell for a spark plug. No. 17511 represents the third embodiment of the present invention, and is a sectional view showing the sixth molding part of a cold extrusion molding machine for molding a body by the method of manufacturing a metal shell for a spark plug. Figures 18 and 19 are cross-sectional views showing a molding machine for molding a fuselage by a conventional manufacturing method, and Figure 20 is A of Figure 19.
- It is a sectional view showing a fuselage in which a recess is formed by cutting A. In the figure, 1...First molding part 2...Second molding part 3...Third molding part 4...Fourth molding part 5...Fifth molding part (first molding part) 6.8.9... 6th forming part (molding part which performs the second process) 7... Spark plug 1
0G... Metal shell 113... Shaft hole 114...
Central part 115...Second information part (cylindrical part) Wl,
W2, W3, W4. W5, W6...fuselage
Claims (1)
る軸穴を形成する第１工程と、 （ｂ）押出し成形によって、前記第１工程により形成さ
れた胴体の中央部より一方側に前記中央部の径より小さ
い径で断面が六角形状の筒状部を形成する第２工程と を備えた主体金具の製造方法。[Claims] 1) (a) A first step of forming a shaft hole passing through the body in the axial direction by extrusion molding; (b) A center of the body formed in the first step by extrusion molding; a second step of forming a cylindrical part having a diameter smaller than the diameter of the central part and a hexagonal cross section on one side of the central part.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP90306794A EP0404570B1 (en) | 1989-06-21 | 1990-06-21 | A method of making a tubular member |
| DE69016848T DE69016848T2 (en) | 1989-06-21 | 1990-06-21 | Process for producing a hollow body. |
| US07/746,177 US5088311A (en) | 1989-06-21 | 1991-08-15 | Method of making a tubular member |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1-158823 | 1989-06-21 | ||
| JP15882389 | 1989-06-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0390243A true JPH0390243A (en) | 1991-04-16 |
| JP2774357B2 JP2774357B2 (en) | 1998-07-09 |
Family
ID=15680160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10822790A Expired - Lifetime JP2774357B2 (en) | 1989-06-21 | 1990-04-24 | Manufacturing method of metal shell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2774357B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07148545A (en) * | 1993-11-29 | 1995-06-13 | Fukui Byora Kk | Production of mouth piece pin |
| JP2001347337A (en) * | 2000-06-06 | 2001-12-18 | Iizuka Seisakusho:Kk | Manufacturing method of gear |
| JP2002011543A (en) * | 2000-06-30 | 2002-01-15 | Ngk Spark Plug Co Ltd | Manufacturing method of cylindrical metal piece |
| KR100829773B1 (en) * | 2005-10-12 | 2008-05-16 | 주식회사 윤성테크 | Cylinder tube and the manufacturing method of do power steering device for vehicles |
| JP2010201457A (en) * | 2009-03-03 | 2010-09-16 | Ngk Spark Plug Co Ltd | Method of producing metallic shell for spark plug |
| JP2012024842A (en) * | 2010-06-25 | 2012-02-09 | Nsk Ltd | Method of manufacturing stepped cylindrical member |
| JP2012154535A (en) * | 2011-01-25 | 2012-08-16 | Ngk Spark Plug Co Ltd | Glow plug |
| CN105081167A (en) * | 2014-05-13 | 2015-11-25 | 陕西宏远航空锻造有限责任公司 | Through hole forging forming method |
| CN113857418A (en) * | 2021-08-23 | 2021-12-31 | 宁波安拓实业有限公司 | Method for manufacturing T-shaped adjusting nut blank for vehicle steering system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000215963A (en) | 1999-01-25 | 2000-08-04 | Ngk Spark Plug Co Ltd | Manufacturing equipment for spark plug and manufacture of spark plug |
| CN111001748A (en) * | 2020-01-08 | 2020-04-14 | 芜湖永辉汽车紧固件有限公司 | Nut cold heading forming and trimming all-in-one machine |
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1990
- 1990-04-24 JP JP10822790A patent/JP2774357B2/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07148545A (en) * | 1993-11-29 | 1995-06-13 | Fukui Byora Kk | Production of mouth piece pin |
| JP2001347337A (en) * | 2000-06-06 | 2001-12-18 | Iizuka Seisakusho:Kk | Manufacturing method of gear |
| JP2002011543A (en) * | 2000-06-30 | 2002-01-15 | Ngk Spark Plug Co Ltd | Manufacturing method of cylindrical metal piece |
| KR100829773B1 (en) * | 2005-10-12 | 2008-05-16 | 주식회사 윤성테크 | Cylinder tube and the manufacturing method of do power steering device for vehicles |
| US8322184B2 (en) | 2009-03-03 | 2012-12-04 | Ngk Spark Plug Co., Ltd. | Method of producing metallic shell for spark plug |
| JP2010201457A (en) * | 2009-03-03 | 2010-09-16 | Ngk Spark Plug Co Ltd | Method of producing metallic shell for spark plug |
| JP4741687B2 (en) * | 2009-03-03 | 2011-08-03 | 日本特殊陶業株式会社 | Manufacturing method of metal shell for spark plug |
| JP2012024842A (en) * | 2010-06-25 | 2012-02-09 | Nsk Ltd | Method of manufacturing stepped cylindrical member |
| JP2012154535A (en) * | 2011-01-25 | 2012-08-16 | Ngk Spark Plug Co Ltd | Glow plug |
| CN105081167A (en) * | 2014-05-13 | 2015-11-25 | 陕西宏远航空锻造有限责任公司 | Through hole forging forming method |
| CN105081167B (en) * | 2014-05-13 | 2017-01-25 | 陕西宏远航空锻造有限责任公司 | Through hole forging forming method |
| CN113857418A (en) * | 2021-08-23 | 2021-12-31 | 宁波安拓实业有限公司 | Method for manufacturing T-shaped adjusting nut blank for vehicle steering system |
| CN113857418B (en) * | 2021-08-23 | 2023-12-05 | 宁波安拓实业有限公司 | Manufacturing method of T-shaped adjusting nut blank for vehicle steering system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2774357B2 (en) | 1998-07-09 |
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