JPH0379097B2 - - Google Patents
Info
- Publication number
- JPH0379097B2 JPH0379097B2 JP60030729A JP3072985A JPH0379097B2 JP H0379097 B2 JPH0379097 B2 JP H0379097B2 JP 60030729 A JP60030729 A JP 60030729A JP 3072985 A JP3072985 A JP 3072985A JP H0379097 B2 JPH0379097 B2 JP H0379097B2
- Authority
- JP
- Japan
- Prior art keywords
- coining
- workpiece
- die
- forging
- hot
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 38
- 238000005242 forging Methods 0.000 claims description 24
- 238000004080 punching Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 230000003746 surface roughness Effects 0.000 description 6
- 238000009966 trimming Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Landscapes
- Forging (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はワークを熱間鍛造後、さらに圧印加工
を施し、加精度の優れたワークを鍛造工程のみで
鍛造する無限軌道履帯リンクの鍛造法に関するも
のである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a forging method for track crawler links in which a workpiece is hot-forged and then further coined to forge a workpiece with excellent machining accuracy using only the forging process. It is related to.
近年素材及び型材質及び技術の向上によりあら
ゆる製品が鍛造にて製造されるようになつた。大
負荷がかかる無限軌道履帯リンクも鍛造にて製造
される一つである。無限軌道車の大きさ、用途に
てリンクの形状は異なるが、その一例を示せば第
２図の如くである。この実施例と異なる形状のリ
ンクであつても両端部には隣接されるリンクのボ
ス部を重ね、軸にて枢着するボス表面及び裏面、
と履板取付面とが直角に仕上げること、及び履板
取付面とこれと反対面のローラ踏面とを平坦面に
仕上げること、さらには履板取付用ボルトのナツ
ト座面を平坦に仕上げることは同じである。
In recent years, due to improvements in materials, mold materials, and technology, all kinds of products have come to be manufactured by forging. Track links, which are subject to heavy loads, are also manufactured by forging. The shape of the link varies depending on the size and purpose of the tracked vehicle, but an example is shown in FIG. 2. Even if the link has a shape different from that of this embodiment, the boss portions of the adjacent links are overlapped at both ends, and the front and back surfaces of the boss are pivoted about the shaft.
and the track mounting surface are finished at right angles, the track mounting surface and the opposite roller tread surface are finished flat, and the nut bearing surface of the track mounting bolt is finished flat. It's the same.
従来この無限軌道履帯用リンクは一般の鍛造工
程即ち潰ち工程・ブロツカー・フイニツシヤーの
工程を経て所要形状に熱間鍛造した後、履板取付
面、履板取付用ボルトのナツト座面、ローラ踏面
を機械加工にて仕上げている。この機械加工には
少なからずの手数を要するため、この機械加工を
省く方法として、潰し・ブロツカー・フイニツシ
ヤーの工程を経て熱間鍛造にて製造されたワーク
をさらにばり抜の工程で上記面を打抜くことが試
みられている。しかし、このワークが1250℃〜
1100℃の高熱を有し、熱間打抜のためワーク表面
に酸化鉄が付着しており、この酸化鉄や熱影響に
より打抜型の刃先が摩耗し、これがために打抜面
の面粗度平面度が悪くなると共にボス表裏面に対
する履板取付面、ローラ踏面及びナツト座面の直
角度の精度も悪くなる。また特開昭58−26685号
公報にはばり抜工程の後、ローラ踏面とシユー取
付面とをコイニングする鍛造法が開示されている
が、リンク片連結部のボス部のコイニングがなさ
れていない。このため上述の機械加工法にて得る
方法と同じように各面のなす直角度精度が悪いも
のである。この面粗度、平面度及び直角度の不良
は履板取付使用時荷重によつて履板が傾むいた
り、履板取付ボルトが弛んだりして不測の事故の
原因ともなる。 Conventionally, links for endless track tracks are hot-forged into the desired shape through a general forging process, that is, a crushing process, a Brodsker finisher process, and then processed into the track mounting surface, the nut bearing surface of the track mounting bolt, and the roller tread surface. is finished by machining. This machining process requires a considerable amount of effort, so as a way to eliminate this machining process, a workpiece manufactured by hot forging after the crushing, blocker, and finisher processes is further hammered on the above-mentioned surface in a deburring process. Attempts are being made to remove it. However, this work is heated to 1250℃~
It has a high heat of 1100℃, and iron oxide adheres to the workpiece surface due to hot punching, and the cutting edge of the punching die wears out due to this iron oxide and the influence of heat, which causes surface roughness of the punched surface. As the flatness deteriorates, the accuracy of the perpendicularity of the track plate mounting surface, roller tread surface, and nut seat surface with respect to the front and back surfaces of the boss also deteriorates. Further, Japanese Patent Application Laid-Open No. 58-26685 discloses a forging method in which the roller tread surface and shoe mounting surface are coined after the deburring process, but the boss portion of the link piece connecting portion is not coined. For this reason, the perpendicularity accuracy of each surface is poor, as is the case with the method obtained by the above-mentioned machining method. Defects in surface roughness, flatness, and perpendicularity can cause unexpected accidents such as the tracks being tilted by the load when the tracks are installed or the track mounting bolts loosening.
本発明は上述の点に鑑み、機械加工を省略して
しかも機械加工と同程度の精度を有するワークを
鍛造にて製造せんとすることを目的となしたもの
で、熱間鍛造に適した温度に加熱された素材を潰
し、ブロツカー・フイニツシヤーの工程を経て所
望の形状に成形し、次に外表に突出するばり、型
抜勾配用の膨出部を熱間ストレート打抜工程にて
かじり取り、その後、熱間コイニング工程を経て
所望形状に成形する無限軌道履帯リンクの鍛造法
において、前記コイニング工程は上下のコイニン
グダイ及び側部コイニングダイ並びにナツト座コ
イニング型を備え、上下のコイニングダイによる
ワークの上下面を加圧し所定寸法かつ平行に保持
し側部コイニングダイによるワーク側部の打抜き
面の圧漬仕上げと、ナツト座コイニング型により
これに嵌め込まれるワークのナツト座をワーク上
下面に平行に整形するようになした鍛造法を提供
する。
In view of the above-mentioned points, it is an object of the present invention to omit machining and to manufacture a workpiece with the same degree of accuracy as machining by forging, and to produce a workpiece at a temperature suitable for hot forging. The heated material is crushed, molded into the desired shape through the Brotzker finisher process, and then the burrs that protrude to the outside and the bulge for the mold draft are removed in a hot straight punching process. Thereafter, in the forging method of a track crawler link, which is formed into a desired shape through a hot coining process, the coining process includes upper and lower coining dies, side coining dies, and nut seat coining dies, and the workpiece is formed by the upper and lower coining dies. Pressure is applied to the upper and lower surfaces to hold them parallel to the specified dimensions, and a side coining die is used to press finish the punched surface of the side of the workpiece, and a nut seat coining die is used to shape the nut seat of the workpiece to be fitted into this so that it is parallel to the upper and lower surfaces of the workpiece. We provide a forging method that achieves this.
以下本発明の無限軌道履帯リンクの鍛造法を実
施例にもとづいて説明する。
The method for forging a track link according to the present invention will be described below based on examples.
まず材料を熱間鍛造に適した温度に加熱した
後、従来の熱間鍛造と同様に潰し工程・ブロツカ
ー工程・フイニツシヤー工程を経て形成する所望
の形状例えば無限軌道履帯リンクを形成する。こ
の時のワークは鍛造型打を容易に行うためワーク
外面特に両型の合わせ面に抜け勾配を有する膨出
部及びばりが一体に突出している。このためばり
及び抜け勾配のための膨出部分を切削（打抜）す
るが、これは鍛造の一工程であるトリミング工程
にて行なう。しかしこの熱間鍛造後のワークは
1100〜1250℃の高熱を有し、この熱間打抜時には
ワーク表面に付着している酸化鉄、及び熱影響に
より打抜型の刃先が摩耗したりして、打抜面が必
らずしも平坦ではなく摩耗した刃先形状が形成さ
れたりして面粗度、平面度が悪いものとなる。さ
らにはボスの表裏面に対する履板取付面、ローラ
踏面の直角度の精度をも劣化させる。この点を改
良するため本発明ではこのトリミングの後コイニ
ング工程を付加する。このコイニングはワークの
少くとも対向する二面をワークの外形面に沿つた
上下部のコイニングダイにて上下より挟持され、
かつトリミング工程での打抜面をこのコイニング
ダイより露出せしめ、このワークの露出面を側部
のコイニングダイにて押圧接して打抜面の一部を
該ダイにて圧潰して上下及び側部のコイニングダ
イにて整形し所望の面粗度・平面度・直角度を得
る。 First, the material is heated to a temperature suitable for hot forging, and then the desired shape, such as a track link, is formed through a crushing process, a blocker process, and a finisher process similar to conventional hot forging. The workpiece at this time has a bulge and a burr integrally protruding from the outer surface of the workpiece, particularly on the mating surfaces of the two dies, to facilitate the forging process. The bulging portion for the flash and draft is cut (punched), and this is done in the trimming process, which is one of the forging processes. However, the workpiece after hot forging is
It has a high temperature of 1,100 to 1,250℃, and during hot punching, iron oxide adhering to the surface of the workpiece and the cutting edge of the punching die wear out due to the heat effect, and the punching surface may not necessarily be damaged. A worn cutting edge shape is formed instead of a flat surface, resulting in poor surface roughness and flatness. Furthermore, the accuracy of the perpendicularity of the track mounting surface and the roller tread surface with respect to the front and back surfaces of the boss is also deteriorated. In order to improve this point, the present invention adds a coining process after this trimming. In this coining, at least two opposing sides of the workpiece are held between upper and lower coining dies along the outer surface of the workpiece.
In addition, the punched surface in the trimming process is exposed from this coining die, and the exposed surface of this work is pressed against the coining die on the side, and a part of the punched surface is crushed by the die to form the top, bottom and side parts. Shape with a coining die to obtain the desired surface roughness, flatness, and squareness.
このコイニングダイの一例を第３図に示す。 An example of this coining die is shown in FIG.
１は下部取付板、２はプレスのラム等に固定さ
れる上部取付板でこの下部取付板１上の中央部に
は下部コイニングダイＡを取りつけるためのコイ
ニング取付板３を設け、この取付板３にクランパ
ー４を介して前記下部コイニングダイＡをセツト
する。また上部取付板２の下面にはコイニング取
付板５を設け該取付板５の下面にクランパー６を
介して上部コイニングダイＢをセツトし、この上
下両コイニングダイにてワークＷの上下面を挟持
せしめるようになす。従つてこのダイA.Bはワー
クＷの上下面外形状に合わせた型面を有するもの
である。また下部取付板１の上部両側部にはカム
スライダー取付板７を固定し、この取付板７にカ
ムスライダー８を水平方向に即ち上下部コイニン
グダイ側面に対し接離方向に摺動自在にして支持
せしめると共にこのカムスライダー８の先端面
（上下部コイニングダイと対向する面）に側部コ
イニングダイＣを着脱交換自在にして固定する。
そして、このカムスライダーの後端面にはカムバ
ツクアツプブロツク９を配設し、かつカムスライ
ダー取付板７に固定されると共にこのブロツク９
とカムスライダー８との間にカムスライダー復帰
用のばねＳを介在せしめ、カムスライダーに対す
る外力が解除された時、このばねＳの作用にてカ
ムスライダーを後退復帰せしめるものである。さ
らにこのカムスライダーの前進は上部取付板２に
固定されたカム１０にて行なわれる。このカム１
０は先端内側面がテーパー面で、このテーパ面の
連設してその内側面が垂直面となつており、この
テーパー面の傾斜角及び長さに応じてこのテーパ
面でカムスライダー後端面と当接してカムスライ
ダーを前進させる。さらにカムが降下すると垂直
面１０ｂにてカムスライダー後端面は当接した状
態でカムのみ降下し、カムスライダーは前進した
位置で停止状態を保つ。このカムスライダーが前
進した時、ワークの打抜面に側面コイニングダイ
が強圧接され、打抜面の一部を圧潰して面粗度、
平面度及びワーク上下面に対する直角度等が修正
整形されるものである。従つてこのカムのテーパ
ー面は側面コイニングダイにて所望のコイニング
が行なわれるようにしてその傾斜角、長さ等が定
められる。そしてこのカムの垂直面にてカムスラ
イダーが前進位置で停止させられている時、さら
に取付板２が降下することによりこの取付板に固
定された上部コイニングダイにより、ワークの上
面X.側面Ｙの面粗度。平面度及び両側面に対す
る直角度が所望の値となるように整形されるよう
になつている。なおワークのX.Y面をコイニング
する下部コイニングダイＡにはナツト座コイニン
グ型A′を取り付け、さらにこれに嵌め込まれる
ワークが左右方向に微少量移動できる隙間を設け
てあり、ワークのローラ踏面、履板取付面、ナツ
ト座面のコイニング時、ナツト座面、履板取付面
をコイニングするカムスライドより微少量のみ先
行するよう左右のカムスライドが設定される。ま
た側部コイニングダイの押進を上記実施例ではカ
ムにて行なうようにしたが、このカムの代りに油
圧シリンダにてカムスライダを押進せしめるかあ
るいはシリンダのロツドに側部コイニングダイを
固定してコイニングを行なうことも可能である。
また上記コイニングの前工程としてトリミングを
行なう工程では第４図に示す如き装置を用いる。
これは上部型１１と下部型１２との間にてワーク
Ｗを挟持せしめた状態でこのワークの外面即ちか
じり取りを行なう部分を上下型より少し突出せし
め、この突出部分を上下部型１１，１２の外側に
昇降自在にして位置せしめた打抜型１３を降下さ
せることにより所望のかじに取り（打抜）を行な
うものである。 1 is a lower mounting plate; 2 is an upper mounting plate fixed to the ram of a press, etc. At the center of this lower mounting plate 1 is provided a coining mounting plate 3 for mounting the lower coining die A; Then, the lower coining die A is set via the clamper 4. Further, a coining mounting plate 5 is provided on the lower surface of the upper mounting plate 2, and an upper coining die B is set on the lower surface of the mounting plate 5 via a clamper 6, and the upper and lower surfaces of the workpiece W are held between the upper and lower coining dies. Do it like this. Therefore, this die AB has a mold surface that matches the outer shape of the upper and lower surfaces of the workpiece W. Further, a cam slider mounting plate 7 is fixed to both sides of the upper part of the lower mounting plate 1, and a cam slider 8 is supported on the mounting plate 7 so as to be slidable horizontally, that is, in the direction toward and away from the upper and lower coining die sides. At the same time, a side coining die C is detachably fixed to the tip surface of the cam slider 8 (the surface facing the upper and lower coining dies).
A cam back up block 9 is disposed on the rear end surface of this cam slider, and is fixed to the cam slider mounting plate 7.
A spring S for returning the cam slider is interposed between the cam slider 8 and the cam slider 8, and when the external force on the cam slider is released, the action of this spring S causes the cam slider to return to the backward position. Furthermore, the cam slider is moved forward by a cam 10 fixed to the upper mounting plate 2. This cam 1
The inner surface of the tip of 0 is a tapered surface, and the inner surface of the tapered surface is a vertical surface. Depending on the inclination angle and length of this tapered surface, this tapered surface can be connected to the rear end surface of the cam slider. They make contact and move the cam slider forward. When the cam further descends, only the cam descends with the rear end surface of the cam slider in contact with the vertical plane 10b, and the cam slider remains stopped at the forward position. When this cam slider moves forward, the side coining die comes into strong pressure contact with the punched surface of the workpiece, crushing a part of the punched surface and improving the surface roughness.
The flatness and perpendicularity to the upper and lower surfaces of the workpiece are corrected and shaped. Therefore, the inclination angle, length, etc. of the tapered surface of this cam are determined so that desired coining is performed using a side coining die. When the cam slider is stopped at the forward position on the vertical plane of this cam, the mounting plate 2 further descends and the upper coining die fixed to this mounting plate causes the upper surface X and side surface Y of the workpiece to be Surface roughness. It is shaped so that the flatness and the perpendicularity to both sides have desired values. The lower coining die A that coins the XY plane of the workpiece is equipped with a nut seat coining type A', and a gap is provided in which the workpiece fitted into this die can move a small amount in the left and right direction. When coining the mounting surface and nut seat surface, the left and right cam slides are set so that they precede the cam slide that coins the nut seat surface and the track plate mounting surface by a small amount. Further, in the above embodiment, the side coining die was pushed forward by a cam, but instead of this cam, a hydraulic cylinder could be used to push the cam slider, or the side coining die could be fixed to the rod of the cylinder. It is also possible to perform coining.
Further, in the trimming process as a pre-coining process, an apparatus as shown in FIG. 4 is used.
This is done by making the outer surface of the work W, which is held between the upper mold 11 and the lower mold 12, project a little from the upper and lower molds, i.e., the part where the galling is to be performed, and the protruding part is connected to the upper and lower molds 11, 12. By lowering a punching die 13 which is movably positioned on the outside of the blank, a desired punching process is performed.
而して本発明による時は無限軌道履帯リンクを
熱間鍛造法で、潰し・ブロツカー・フイニツシヤ
ーの工程の後に熱間ストレート打抜きを行ないか
つ熱間コイニング工程を経て成形する際、このコ
イニング工程において下部コイニングダイＡにナ
ツト座コイニング型A′が取りつけられているか
ら、ローラ踏面およびシユー取付面のコイニング
と同時にナツト座面のコイニングを行うことがで
き、しかもシユー取付面とナツト座面の平行度が
精度良く矯正されるものである。このためにシユ
ーボルトの緩みが防止できるとともに、ローラ踏
面、シユー取付面、およびナツト座面をコイニン
グした状態のまま、側部コイニングダイによりワ
ーク側部の打抜き面を圧漬し基準面Ｘ，Ｙをコイ
ニングするためシユー取付面に対する基準面Ｘ，
Ｙの高精度の直角度が得られ、チエンリンクとし
て鍛造後、機械加工することなく、高精度の製品
を得られるものとなり、機械加工工程を省略し
て、鍛造工程のみで機械加工と同程度の精度を有
する製品を得ることが安価にできると共に従来の
生産工程でコイニング後、鍛造焼入れも簡易に行
なえる利点を有する。
According to the present invention, when the endless track crawler link is hot forged and hot straight punched after the crushing, blocker, and finisher steps and then formed through the hot coining step, the lower part is formed in the coining step. Since the nut seat coining type A' is attached to the coining die A, the nut seat surface can be coined at the same time as the roller tread surface and the shoe mounting surface are coined, and the parallelism between the shoe mounting surface and the nut seat surface can be It can be corrected with high precision. This prevents the shoe bolt from loosening, and while the roller tread surface, shoe mounting surface, and nut seat surface are coined, the side coining die presses the punched surface on the side of the workpiece to form the reference planes X and Y. Reference plane X for the shoe mounting surface for coining,
A high-precision squareness of Y can be obtained, and a high-precision product can be obtained without machining after forging as a chain link.The machining process is omitted, and the forging process alone is equivalent to machining. It has the advantage that it is possible to obtain a product with a precision of 1 at a low cost, and that it can be easily forged and quenched after coining in the conventional production process.
第１図は本発明の鍛造法を示す概略説明図、第
２図は本発明鍛造法で製する一実施例の無限軌道
履帯リンクの外観図、第３図はコイニングの説明
図でＡはその正面図、Ｂはその側面図、第４図は
打抜型の説明図である。
１は下部取付板、２は上部取付板、３はコイニ
ング取付板、４はクランパー、５はコイニング取
付板、６はクランパー、７はカムスライダー取付
板、８はカムスライダー、９はカムバツクアツプ
ブロツク、１０はカム、１０ａはテーパ面、１０
ｂは垂直面、Ａは下部コイニングダイ、Ｂは上部
コイニングダイ、Ｃは側部コイニングダイ、Ｗは
ワーク、Ｓはばね。
Fig. 1 is a schematic explanatory diagram showing the forging method of the present invention, Fig. 2 is an external view of an example of an endless track crawler link manufactured by the forging method of the present invention, and Fig. 3 is an explanatory diagram of coining. B is a front view, B is a side view thereof, and FIG. 4 is an explanatory diagram of the punching die. 1 is the lower mounting plate, 2 is the upper mounting plate, 3 is the coining mounting plate, 4 is the clamper, 5 is the coining mounting plate, 6 is the clamper, 7 is the cam slider mounting plate, 8 is the cam slider, 9 is the cam back up block , 10 is a cam, 10a is a tapered surface, 10
b is the vertical plane, A is the lower coining die, B is the upper coining die, C is the side coining die, W is the workpiece, and S is the spring.
Claims (1)
し、ブロツカー・フイニツシヤーの工程を経て所
望の形状に成形し、次に外表に突出するばり、型
抜勾配用の膨出部を熱間ストレート打抜工程にて
かじり取り、その後、熱間コイニング工程を経て
所望形状に成形する無限軌道履帯リンクの鍛造法
において、前記コイニング工程は上下のコイニン
グダイ及び側部コイニングダイ並びにナツト座コ
イニング型を備え、上下のコイニングダイによる
ワークの上下面を加圧し所定寸法かつ平行に保持
し側部コイニングダイによるワーク側部の打抜き
面の圧漬仕上げと、ナツト座コイニング型により
これに嵌め込まれるワークのナツト座をワーク上
下面に平行に整形することを特徴とする無限軌道
履帯リンクの鍛造法。1. The material is heated to a temperature suitable for hot forging, then crushed and formed into the desired shape through the Brotzker finisher process. Next, the burrs that protrude on the outside and the bulge for the mold draft are hot straightened. In a forging method for a track crawler link in which galling is removed in a punching process and then formed into a desired shape through a hot coining process, the coining process includes upper and lower coining dies, side coining dies, and a nut seat coining die. The upper and lower coining dies press the upper and lower surfaces of the workpiece to hold it in a predetermined dimension and parallel, the side coining die presses the punched surface of the side of the workpiece, and the nut seat coining die inserts the nut seat of the workpiece into this. A forging method for endless track crawler links, which is characterized by shaping the wheels parallel to the upper and lower surfaces of the workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3072985A JPS61189839A (en) | 1985-02-19 | 1985-02-19 | Forging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3072985A JPS61189839A (en) | 1985-02-19 | 1985-02-19 | Forging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61189839A JPS61189839A (en) | 1986-08-23 |
| JPH0379097B2 true JPH0379097B2 (en) | 1991-12-17 |
Family
ID=12311753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3072985A Granted JPS61189839A (en) | 1985-02-19 | 1985-02-19 | Forging method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61189839A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111069512A (en) * | 2019-12-16 | 2020-04-28 | 北京北方车辆集团有限公司 | Forming method of track shoe for track type thin-shell vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6789569B2 (en) * | 2016-10-14 | 2020-11-25 | 株式会社ワイテック | Molding equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5826685A (en) * | 1981-07-24 | 1983-02-17 | キヤタピラ−・トラクタ−・コンパニ− | Track chain link and its forging method |
-
1985
- 1985-02-19 JP JP3072985A patent/JPS61189839A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5826685A (en) * | 1981-07-24 | 1983-02-17 | キヤタピラ−・トラクタ−・コンパニ− | Track chain link and its forging method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111069512A (en) * | 2019-12-16 | 2020-04-28 | 北京北方车辆集团有限公司 | Forming method of track shoe for track type thin-shell vehicle |
| CN111069512B (en) * | 2019-12-16 | 2021-02-26 | 北京北方车辆集团有限公司 | Forming method of track shoe for track type thin-shell vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61189839A (en) | 1986-08-23 |
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