JPH01166841A - Continuous cold forming method - Google Patents
Continuous cold forming methodInfo
- Publication number
- JPH01166841A JPH01166841A JP32451587A JP32451587A JPH01166841A JP H01166841 A JPH01166841 A JP H01166841A JP 32451587 A JP32451587 A JP 32451587A JP 32451587 A JP32451587 A JP 32451587A JP H01166841 A JPH01166841 A JP H01166841A
- Authority
- JP
- Japan
- Prior art keywords
- lubricant
- forging
- cavity
- intermediate part
- cold forming
- 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
- 238000000034 method Methods 0.000 title claims description 29
- 238000005242 forging Methods 0.000 claims abstract description 29
- 239000000314 lubricant Substances 0.000 claims abstract description 29
- 238000003483 aging Methods 0.000 claims abstract description 12
- 239000010687 lubricating oil Substances 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 8
- 239000002199 base oil Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims abstract description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 4
- 239000011575 calcium Substances 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 230000000996 additive effect Effects 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 abstract description 9
- 239000007787 solid Substances 0.000 abstract description 6
- 238000010273 cold forging Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 14
- 239000013067 intermediate product Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 235000014593 oils and fats Nutrition 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 206010010904 Convulsion Diseases 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は素材を変態点(再結晶温度)・以下の温度で連
続的に鍛造成形する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for continuously forging a material at a temperature equal to or lower than its transformation point (recrystallization temperature).
(従来の技術)
素材に対し複数の鍛造(圧造)工程を連続的に施すこと
で製品とする従来技術として特開昭60−115343
号に開示されるものが知られている。(Prior art) Japanese Patent Application Laid-Open No. 115343/1986 is a conventional technology that produces a product by sequentially performing multiple forging (heading) processes on a material.
The one disclosed in No.
この方法は、複数の鍛造用金型を並設したトランスファ
ブレスマシンにて、素材(ビレット)を順次成形してア
ンカーボルトとするものである。In this method, a material (billet) is sequentially formed into an anchor bolt using a transfer press machine equipped with a plurality of forging dies in parallel.
(発明が解決しようとする問題点)
上述した従来方法にあっては潤滑と時効硬化(加工硬化
)の問題がある。(Problems to be Solved by the Invention) The conventional method described above has problems with lubrication and age hardening (work hardening).
先ず鍛造を行うには素材表面に潤滑膜を形成した状態で
行わないと焼付き等を生じるため、素材表面にボンデ処
理等によって化成被膜を形成するか、各鍛造工程毎に素
材又は金型に向けて潤滑オイルを吹き付けるようにして
いる。First, when forging is performed, a lubricating film must be formed on the surface of the material, otherwise seizures may occur. Therefore, a chemical conversion film must be formed on the surface of the material by bonding, or the material or mold must be I try to spray lubricating oil towards it.
しかしながら、ボンデ処理によって形成した潤滑被膜は
成形率の大小にかかわらず1回の成形で被膜厚さが激減
し、連続的に成形することができず、成形率が大きい場
合には成形の際に発生する熱によって潤滑効果が失われ
る不利がある。また、潤滑オイルを使用する場合には素
材及び金型の全面に均一に塗布することが困難で、塗布
後のオイルの処理も面倒で、化成被膜と異なり単に素材
表面に油膜が介在しているだけなので、成形圧を高める
と油膜切れを起こし、焼付きが発生する。However, regardless of the size of the forming rate, the lubricating film formed by the bonding process drastically reduces the film thickness after one molding, and cannot be continuously formed. The disadvantage is that the lubricating effect is lost due to the heat generated. Furthermore, when lubricating oil is used, it is difficult to apply it uniformly to the entire surface of the material and mold, and treatment of the oil after application is troublesome, and unlike chemical conversion coatings, there is simply an oil film on the surface of the material. Therefore, if the molding pressure is increased, the oil film will run out and seizure will occur.
一方、変態点(再結晶温度)以下で成形を行うと時効硬
化を起こす。この時効硬化は成形後に一定時間経過して
から顕著となることを本発明者は見出したが、従来の方
法では、各成形工程の前に潤滑被膜を形成しているため
、時効硬化が顕著となる前に次の成形を行うことができ
ず、このため焼鈍を成形前に施す必要があり、生産効率
の面において極めて不利となっている。On the other hand, when molding is performed below the transformation point (recrystallization temperature), age hardening occurs. The present inventor found that this age hardening becomes noticeable after a certain period of time has passed after molding, but in conventional methods, a lubricating film is formed before each molding process, so age hardening becomes noticeable. Therefore, it is necessary to perform annealing before forming, which is extremely disadvantageous in terms of production efficiency.
(問題点を解決するための手段)
上記問題点を解決すべく本発明は、前工程の成形にて昇
温した素材と接触することで、素材表面に固体潤滑膜を
形成する液体潤滑剤を2番目以降の金型キャビティ内に
充填してお籾、且つ各鍛造後から次の鍛造へ移るまでの
時間を時効硬化が顕著にならないうちに行うようにした
。(Means for Solving the Problems) In order to solve the above problems, the present invention uses a liquid lubricant that forms a solid lubricant film on the surface of the material when it comes into contact with the material whose temperature has been raised in the previous process of molding. The second and subsequent mold cavities are filled with rice, and the time from each forging to the next forging is made so that age hardening does not become noticeable.
(作用)
金型キャビティ内に予め熱反応性の液体潤滑剤を充填し
ておくことで、素材をキャビティ内に入れるだけで潤滑
被膜を形成でき、したがって短時間のうちに連続して鍛
造することができる。(Function) By filling the mold cavity with a heat-reactive liquid lubricant in advance, a lubricating film can be formed just by placing the material into the cavity, allowing for continuous forging in a short period of time. Can be done.
(実施例) 以下に本発明の実施例を添付図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the accompanying drawings.
第1図は本発明方法を実施するための縦打ち成形プレス
マシンの断面図、第2図(A)乃至(D)はビレット(
素材)から製品としてのカウンターシャフトとなるまで
の過程を示した図であり、実施例としては3回の鍛造工
程を連続的に行うものを示す。Figure 1 is a sectional view of a vertical forming press machine for carrying out the method of the present invention, and Figures 2 (A) to (D) are billet (
It is a diagram illustrating the process from a raw material to a countershaft as a product, and shows an example in which three forging steps are performed continuously.
縦打ち成形プレスマシンは最初の鍛造を行う金型装置1
0を図において左側に、この鍛造に続く鍛造を行う金型
装置20を右側に、最後の鍛造を行う金型装置30を中
央に配置し、更に金型装置20の側方には金型装置20
.30に潤滑剤を給排する給排装置40を設けている。The vertical forming press machine is the mold device 1 that performs the first forging.
0 is placed on the left side in the figure, the mold device 20 that performs the subsequent forging is placed on the right side, and the mold device 30 that performs the final forging is placed in the center. 20
.. 30 is provided with a supply/discharge device 40 for supplying and discharging lubricant.
各金型装置10,20.30は複数の金型11・・・、
21・・・、31・・・とバンチ12,22.32によ
って構成され、各金型11,21.31を貫通するよう
にキャビティ13,23.33が形成され、キャビティ
13.23.33を形成する金型11.21.31の内
周面には素材を小径に絞る段部14,24.34を設け
、特に最終の鍛造を行う金型装置30の金型内周面には
スプラインを形成するための刃部35を設けている。Each mold device 10, 20, 30 has a plurality of molds 11...,
21..., 31... and bunches 12, 22.32, and cavities 13, 23.33 are formed so as to penetrate each mold 11, 21.31. Steps 14, 24, 34 for squeezing the material to a small diameter are provided on the inner peripheral surface of the forming mold 11.21.31, and in particular, splines are provided on the inner peripheral surface of the mold of the mold device 30 that performs the final forging. A blade portion 35 is provided for forming.
また、金型装置20.30の上部にはキャビティ23.
33の上部に開口する潤滑剤の供給路26.36を形成
し、金型装置20.30の中間部乃至下部にかけてはキ
ャビティ23.33の最下端に開口する潤滑剤の排出路
27.37を形成している。Moreover, a cavity 23.
A lubricant supply path 26.36 is formed at the top of the cavity 23.33, and a lubricant discharge path 27.37 is formed at the bottom of the cavity 23.33 from the middle to the bottom of the mold device 20.30. is forming.
一方、潤滑剤の給排装置40は潤滑油タンク41内に前
記供給路26.36につながる供給バイブ42と、前記
排出路27.37につながる排出バイブ43を臨ませ、
モータ44によって駆動するポンプ45にて汲み上げた
潤滑剤をチエツクバルブ46及びソレノイドバルブ47
を介して供給路26.36に送り込むようにしている。On the other hand, the lubricant supply/discharge device 40 has a supply vibrator 42 connected to the supply path 26.36 and a discharge vibrator 43 connected to the discharge path 27.37 facing inside the lubricant tank 41,
A check valve 46 and a solenoid valve 47 check the lubricant pumped up by a pump 45 driven by a motor 44.
The liquid is fed into the supply path 26.36 via the feed line 26.36.
またタンク41と排出路27.37とをつなぐ排出バイ
ブ43の途中にはリリーフバルブ48を設けている。こ
のリリーフバルブ48はバイパス路49からの圧力でも
ってスプリング50に抗してB勤(第1図右方)して流
路を開成し、バイパス路49内の圧力が低下すると流路
を閉じる構造となっている。Further, a relief valve 48 is provided in the middle of the discharge vibe 43 that connects the tank 41 and the discharge passage 27.37. This relief valve 48 has a structure in which the pressure from the bypass passage 49 acts B against the spring 50 (right side in Figure 1) to open the passage, and when the pressure in the bypass passage 49 decreases, the passage is closed. It becomes.
尚、供給バイブ42と排出バイブ43間は分岐管51.
52でつながっており、これら分岐管51.52にも前
記同様のリリーフバルブ53゜54を設け、供給バイブ
42内の圧力が所定値を超えた場合に排出パイプ43内
へ潤滑剤を逃がすようにしている。Note that a branch pipe 51 is connected between the supply vibrator 42 and the discharge vibrator 43.
These branch pipes 51 and 52 are also provided with relief valves 53 and 54 similar to those described above, so that the lubricant is released into the discharge pipe 43 when the pressure inside the supply vibe 42 exceeds a predetermined value. ing.
ところで本発明にあっては加熱されることで素材表面に
固体潤滑被膜を形成する熱反応性の液体潤滑剤を用いる
。液体潤滑剤としてはナフテン系ベースオイルにカルシ
ウム系添加剤(15,0冑を零〜25、Owt!k)及
び活性又は不活性の硫化油脂(イオウ分4.Owtk〜
7.Owt!k)を添加し、更に必要に応じてCu、Z
n等の非遷移金属の粒径100μm以下の微細粉末(1
,Owtk 〜5.Owt!k)、塩素化パラフィン(
2,Owtt〜30wt96)を添加したものを用いる
。However, in the present invention, a thermally reactive liquid lubricant is used that forms a solid lubricant film on the surface of the material when heated. The liquid lubricant is a naphthenic base oil with calcium additives (15.0 to 0 to 25, Owt!k) and active or inactive sulfurized fats and oils (sulfur content of 4.0 to 25, Owtk).
7. Owt! k), and further add Cu, Z as necessary.
Fine powder (1
, Owtk ~5. Owt! k), chlorinated paraffin (
2, Owtt~30wt96) is used.
ここで潤滑剤を以上の如き物質にて構成したのは以下の
理由による。The reason why the lubricant is made of the above substances is as follows.
先ず、活性或いは不活性硫化油脂は、通常の状態では反
応しないが、油性剤による油膜が破断した後、つまり摩
擦熱及び鍛造熱によって素材温度が上昇すると、化学的
に分解し、金型及び素材と反応して硫化鉄になり第3図
に示すように耐圧性に優れた固体潤滑被膜を形成する。First, active or inactive sulfurized oils and fats do not react under normal conditions, but after the oil film caused by the oil-based agent is broken, that is, when the material temperature rises due to frictional heat and forging heat, they chemically decompose, causing mold and material damage. It reacts with iron sulfide to form a solid lubricant film with excellent pressure resistance as shown in FIG.
そして、第4図に示すように、活性硫化油脂と不活性硫
化油脂とはその使用温度範囲が異なり、前者にあっては
150〜300℃、後者にあっては250〜400℃が
適当であるので、成形率等に応じて使い分けるのが好ま
しい。As shown in Figure 4, active sulfurized oils and fats and inactive sulfurized oils and fats have different operating temperature ranges, with the former being appropriate at 150-300°C and the latter at 250-400°C. Therefore, it is preferable to use them properly depending on the molding rate and the like.
また、カルシウム系添加剤(1μm以下の極微細粉末)
を添加することで潤滑膜の保持性が向上し且つ摩擦係数
が上昇するまでの時間を遅らせることができ、ナフテン
系ベースオイルとすることでパラフィン系ベースオイル
に比べて添加剤の溶解性に優れ、更にCu、 Zn等の
非遷移金属粉末を添加することで耐摩耗性が改善される
。In addition, calcium-based additives (extremely fine powder of 1 μm or less)
The addition of naphthenic base oil improves the retention of the lubricating film and delays the time it takes for the coefficient of friction to rise, and naphthenic base oil has superior solubility of additives compared to paraffinic base oil, and Wear resistance is improved by adding non-transition metal powders such as Cu and Zn.
次に縦打ち成形プレスマシンを用いた冷間連続成形方法
について述べる。Next, a cold continuous forming method using a vertical forming press machine will be described.
先ず第2図(A)に示すように素材としてのビレットW
1を用意する。このビレットW1表面にはボンデ処・埋
による化成被膜を予め形成しておく。First, as shown in Fig. 2 (A), billet W is used as a material.
Prepare 1. A chemical conversion film is previously formed on the surface of this billet W1 by bonding and filling.
上記のビレットW1を金型装置10のキャビティ13に
セットし、上方からバンチ12によって鍛造成形し、第
2図(B)に示す中間品W2を得る。The above billet W1 is set in the cavity 13 of the mold device 10, and forged from above by the bunches 12 to obtain the intermediate product W2 shown in FIG. 2(B).
そして、上記中間品W2を金型装置10から払い出し、
金型装置20のキャビティ23内に投入する。ここで、
金型装置10による鍛造終了から金型装置20による鍛
造開始までの時間は、成形後の時効硬化が始まるまでの
時間内に行う。具体的には第5図に示すように、成形後
の素材硬度がHRB85となるのが18秒後であるので
、18秒以内に金型装置20による鍛造を開始するのが
好ましい。Then, the intermediate product W2 is discharged from the mold device 10,
It is put into the cavity 23 of the mold device 20. here,
The time from the end of forging by the mold device 10 to the start of forging by the mold device 20 is within the time until age hardening begins after molding. Specifically, as shown in FIG. 5, since the material hardness after forming reaches HRB85 after 18 seconds, it is preferable to start forging using the mold device 20 within 18 seconds.
また、金型装置20による鍛造にあっては、予めキャビ
ティ23内に前記液体潤滑剤を充填しておく。そして斯
かる状態のキャビティ23内に金型装置10によっであ
る程度絞り成形された中間品W2を挿入する。このとき
中間品W2は前工程での成形により200℃以上に昇温
しているため、中間品W2をキャビティ23内に充填し
た潤滑剤中に浸漬すると、前記したように潤滑剤が反応
し、中間品W2表面に固体潤滑被膜が生成される。この
ように固体潤滑被膜を表面に生成した中間品W2をバン
チ22によってキャビティ23内に押込み、第2図(C
)に示すような中間品W3を絞り成形する。Further, in forging using the mold device 20, the cavity 23 is filled with the liquid lubricant in advance. Then, the intermediate product W2, which has been drawn to some extent by the mold device 10, is inserted into the cavity 23 in such a state. At this time, the temperature of the intermediate product W2 has increased to 200°C or more due to the molding in the previous process, so when the intermediate product W2 is immersed in the lubricant filled in the cavity 23, the lubricant reacts as described above. A solid lubricant film is generated on the surface of the intermediate product W2. The intermediate product W2 with the solid lubricant film formed on its surface is pushed into the cavity 23 by the bunch 22, and as shown in FIG.
) An intermediate product W3 as shown in FIG.
尚、上記金型装置20による成形において、キャピテイ
23内に供給された潤滑剤はキャビティ23上端が中間
品W2の大径部によって塞がれることでキャビティ23
内に密閉され、中間品W2がバンチ22によって下方へ
8勤せしめられることでキャビティ23内の潤滑剤の圧
力が高くなる。そして潤滑剤の圧力が一定値を超えると
、前記リリーフバルブ48が開となり、キャビティ23
内の潤滑剤は一定圧を維持したまま排出路271.排出
バイブ43を介してタンク41内に戻される。In addition, during molding by the mold device 20, the lubricant supplied into the cavity 23 is absorbed into the cavity 23 because the upper end of the cavity 23 is closed by the large diameter portion of the intermediate product W2.
The pressure of the lubricant in the cavity 23 increases as the intermediate product W2 is forced downward by the bunch 22. When the pressure of the lubricant exceeds a certain value, the relief valve 48 opens and the cavity 23
The lubricant in the discharge passage 271. is maintained at a constant pressure. It is returned into the tank 41 via the discharge vibe 43.
ここで、鍛造の際に潤滑剤は一定圧を超えるまでキャビ
ティ内に閉じ込められるため静水圧効果により中筒品W
2の全面に潤滑剤が充分に行き渡る。During forging, the lubricant is trapped inside the cavity until it exceeds a certain pressure, so the hydrostatic pressure effect causes the middle cylinder part W
The lubricant is sufficiently distributed over the entire surface of 2.
このようにして、金型装置20による鍛造が終了したな
らば、前記同様成形後の時効硬化が顕著となる前に金型
装置30による鍛造を開始する。In this way, once forging by the mold device 20 is completed, forging by the mold device 30 is started before age hardening after forming becomes noticeable, as described above.
尚、金型装置30による成形にあっては絞り成形と同時
にスプラインをも成形し′、第2図(D)に示すカウン
ターシャフトW4を得る。Incidentally, in the molding by the mold device 30, the spline is also formed at the same time as the drawing, to obtain the countershaft W4 shown in FIG. 2(D).
尚、実施例にあってはカウンターシャフトの成形につい
て説明したが、第6図に示すような工程を経て等速ジヨ
イントを製作する場合等にも本発明は適用できる。Incidentally, in the embodiment, the forming of the countershaft has been described, but the present invention can also be applied to the case where a constant velocity joint is manufactured through the steps shown in FIG.
(発明の効果)
以上に説明した如く本発明によれば、複数の冷間鍛造工
程を連続的に施すにあたり、2番目以降の鍛造において
は金型キャビティ内に熱反応性の潤滑剤を充填しておく
ようにしたので、素材をキャビティ内に投入するだけで
その表面に潤滑被膜が形成され、したがって成形後の時
効硬化が始まる前に次の成形を行うことができる。(Effects of the Invention) As explained above, according to the present invention, when performing a plurality of cold forging processes in succession, a heat-reactive lubricant is filled into the mold cavity in the second and subsequent forging processes. Since the material is kept in the mold for a long period of time, a lubricating film is formed on the surface of the material simply by introducing it into the cavity, so that the next molding can be performed before age hardening after molding begins.
したがって従来の如く各成形工程毎に潤滑膜を形成した
り焼鈍を行う等の中間IA埋を省くことができ、作業効
率が大幅に向上する。Therefore, it is possible to eliminate intermediate IA processes such as forming a lubricating film or performing annealing for each forming process as in the past, and work efficiency is greatly improved.
第1図は本発明方法を実施する縦打ち成形プレスマシン
の断面図、第2図(A)乃至(D)はビレットから製品
までの形状変化の過程を示す図、第3図は面圧と摩擦係
数との関係を示すグラフ、第4図は温度と摩擦係数との
関係を示すグラフ、第5図は成形後の経過時間と素材の
温度及び硬度との関係を示すグラフ、第6図は別実施例
を示す図である。
尚、図面中、10,20.30は金型装置、13.23
.33はキャビティ、26.36は潤滑剤の供給路、2
7.37は潤滑剤の排出路、40は潤滑剤の給排装置で
ある。
特 許 出 願 人 本田技研工業株式会社代理人
弁理士 下 1) 容一部間 弁理士
大 橋 邦 部同 ゛弁理士
小 山 右同 弁理士 野
1) 茂第2図
(A) (B)
(c)(D)Figure 1 is a cross-sectional view of a vertical forming press machine that carries out the method of the present invention, Figures 2 (A) to (D) are diagrams showing the process of shape change from a billet to a product, and Figure 3 is a diagram showing the change in shape from a billet to a product. Figure 4 is a graph showing the relationship between temperature and friction coefficient. Figure 5 is a graph showing the relationship between elapsed time after molding and the temperature and hardness of the material. Figure 6 is a graph showing the relationship between temperature and friction coefficient. It is a figure which shows another Example. In addition, in the drawing, 10, 20.30 are mold devices, 13.23
.. 33 is a cavity, 26.36 is a lubricant supply path, 2
7.37 is a lubricant discharge path, and 40 is a lubricant supply/discharge device. Patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Part 2 1) Part 1 Patent Attorney
Kuni Ohashi, Patent Attorney
Udo Koyama Patent Attorney No
1) Shigeru Diagram 2 (A) (B) (c) (D)
Claims (2)
て、最初の鍛造工程では表面に化成被膜を形成した素材
を成形し、これに続く鍛造工程では金型キャビティ内に
予め熱反応性の液体潤滑剤を充填しておき、この液体潤
滑剤に前の成形によって温度上昇した素材を接触させて
素材表面に潤滑膜を生成した状態で成形し、更に2番目
以降の鍛造工程は前工程における成形後の時効硬化が始
まる前に行うようにしたことを特徴とする冷間連続成形
方法。(1) In a continuous cold forming method consisting of multiple forging processes, the first forging process involves forming a material with a chemical conversion film formed on its surface, and the subsequent forging process involves pre-filling the mold cavity with a heat-reactive liquid. Filled with lubricant, this liquid lubricant is brought into contact with the material whose temperature has increased due to the previous forming process, and the material is formed with a lubricant film formed on the surface of the material.Furthermore, the second and subsequent forging processes are performed using the forming process in the previous process. A continuous cold forming method characterized in that the cold forming process is carried out before subsequent age hardening begins.
イルにカルシウム系添加剤と硫化油脂とを添加してなる
ことを特徴とする特許請求の範囲第1項記載の冷間連続
成形方法。(3)前記2番目以降の鍛造工程と前工程と
の間の時間は18秒以内としたことを特徴とする特許請
求の範囲第1項記載の冷間連続成形方法。(2) The continuous cold forming method according to claim 1, wherein the thermally reactive liquid lubricant is made by adding a calcium additive and a sulfurized oil to naphthenic base oil. (3) The continuous cold forming method according to claim 1, wherein the time between the second and subsequent forging steps and the preceding step is within 18 seconds.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32451587A JPH01166841A (en) | 1987-12-21 | 1987-12-21 | Continuous cold forming method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32451587A JPH01166841A (en) | 1987-12-21 | 1987-12-21 | Continuous cold forming method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01166841A true JPH01166841A (en) | 1989-06-30 |
Family
ID=18166659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP32451587A Pending JPH01166841A (en) | 1987-12-21 | 1987-12-21 | Continuous cold forming method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01166841A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04356324A (en) * | 1991-05-31 | 1992-12-10 | Musashi Seimitsu Ind Co Ltd | Method and device for forging spline shaft |
US11149816B2 (en) | 2018-10-23 | 2021-10-19 | Grammer Ag | Vehicle seat element for a vehicle seat with a residual spring travel adjustment device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59150639A (en) * | 1983-02-17 | 1984-08-28 | Mitsubishi Heavy Ind Ltd | Forging method of spiral parts |
-
1987
- 1987-12-21 JP JP32451587A patent/JPH01166841A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59150639A (en) * | 1983-02-17 | 1984-08-28 | Mitsubishi Heavy Ind Ltd | Forging method of spiral parts |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04356324A (en) * | 1991-05-31 | 1992-12-10 | Musashi Seimitsu Ind Co Ltd | Method and device for forging spline shaft |
US11149816B2 (en) | 2018-10-23 | 2021-10-19 | Grammer Ag | Vehicle seat element for a vehicle seat with a residual spring travel adjustment device |
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