JPH05318A - Automatic chamfering device for cutoff end in wire rod supply device - Google Patents
Automatic chamfering device for cutoff end in wire rod supply deviceInfo
- Publication number
- JPH05318A JPH05318A JP18306891A JP18306891A JPH05318A JP H05318 A JPH05318 A JP H05318A JP 18306891 A JP18306891 A JP 18306891A JP 18306891 A JP18306891 A JP 18306891A JP H05318 A JPH05318 A JP H05318A
- Authority
- JP
- Japan
- Prior art keywords
- wire rod
- chamfering
- feeding
- cut
- stopper
- 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
Landscapes
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Wire Processing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、圧造製品の素材となる
線材を圧造機に供給する場合において、線材の繰出端を
切断部材により切断したあとにその切断端を自動的に面
取りするのに用いる切断端自動面取装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for automatically chamfering a wire rod, which is a raw material for a forging product, after the wire rod is cut by a cutting member when the wire rod is fed to a forging machine. The present invention relates to a cutting edge automatic chamfering device.
【０００２】[0002]
【従来の技術】線材を圧造機に供給する部分の構造は、
コイル状に巻回された線材の繰出端を一対の送込用ロー
ラで挟圧して、前方に装置した別の一対の駆動用ローラ
にくわえ込ませるまで送り出し、それ以降は、送込用ロ
ーラの挟圧を解除して駆動用ローラにより線材を間欠的
に引張して一定長さずつ剪断部に供給するようになつて
いるが、線材の繰出端は一般に著しく変形したり、押し
潰されて硬くなり過ぎているきらいがあつて、そのまま
使用したのではダイスやパンチに損傷を与えるおそれが
あるため、駆動用ローラにくわえ込ませる前に、鋸歯等
を用いて予め繰出端の一定長さを切り捨てるようにして
いる。2. Description of the Related Art The structure of the part that supplies a wire rod to a compacting machine is
The feeding end of the wire wound in a coil shape is pinched by a pair of feeding rollers, and is fed until it is gripped by another pair of driving rollers installed in the front. The pinching pressure is released, and the wire rod is intermittently pulled by the drive roller to supply it to the shearing portion at a constant length.However, the feeding end of the wire rod is generally significantly deformed or crushed and hard. If it is used as it is, it may damage the die or punch.Before putting it in the driving roller, use a saw blade to cut off a certain length of the feeding end in advance. I am trying.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、その切
断の際に切断端にはバリが出る可能性があり、それがあ
ると剪断ダイスにうまく通らないためにさらに切断端の
面取りを行う必要があるのであつて、従来は、それをヤ
スリがけ等の手作業で行つていたため、非能率的である
ばかりでなく、例えば、夜間等を利用した無人運転を行
おうとした場合にも、これができない欠点があつた。However, there is a possibility that burrs are generated at the cutting end during the cutting, and if such burrs are present, it is difficult to pass through the shearing die, and therefore it is necessary to further chamfer the cutting end. Therefore, in the past, it was not only inefficient because it was done by hand such as sanding, but it is not possible even when trying to perform unmanned driving at night, for example. I got it.
【０００４】[0004]
【課題を解決するための手段】本発明の線材供給装置に
おける切断端自動面取装置は、上記のような事情を背景
として完成されたものであつて、切断端が一定位置で停
止するように線材を挟持しかつその挟持を解除し得る挟
持部材を設けるとともに、切断端に前方から当接するこ
とによりその面取りを行う面取具を、線材の供給経路上
とその側方との間で進退可能に、かつ、供給経路上に沿
つた進退可能に装置した構成とした。The automatic cutting edge chamfering device in the wire rod feeding device of the present invention was completed in view of the above circumstances, and the cutting edge is stopped at a fixed position. A clamping member that clamps and releases the wire rod is provided, and a chamfering tool that chamfers by contacting the cut end from the front can be advanced and retracted between the wire feed route and its side. In addition, the device is configured so that it can move back and forth along the supply route.
【０００５】[0005]
【作用】線材の繰出端が切断されたのちさらに前方に送
り出されて一定位置に達すると、線材が挟持部材で挟持
されて固定され、そうすると、側方に退避していた面取
具が線材の供給経路上に進出するとともに切断端に向か
つて前進し、切断端に押し付けられることにより切断端
の面取りが行われてバリが除去される。面取りが終わる
と、面取具が切断端から後退するとともに供給経路の側
方に逃げ、挟持部材の挟持の解除により線材が再び前方
に送り出されて、駆動用ローラに引き渡される。[Function] When the feeding end of the wire rod is cut and then sent further forward and reaches a certain position, the wire member is clamped and fixed by the clamping member. The burrs are removed by chamfering the cutting end by advancing to the supply path, moving forward toward the cutting end, and being pressed against the cutting end. After the chamfering is completed, the chamfer retracts from the cut end and escapes to the side of the supply path, and the wire rod is sent forward again by releasing the sandwiching of the sandwiching member and delivered to the driving roller.
【０００６】[0006]
【発明の効果】このように本発明装置によれば、従来手
作業で行つていた線材の切断端の面取り作業を一連の供
給工程の中で自動的に行うことができるから、面取りの
ためにわざわざ圧造機を停めるのが不要となり、また、
夜間等を利用した無人運転も可能となつて、生産能率を
大幅に向上させることができる効果がある。As described above, according to the apparatus of the present invention, the chamfering work of the cut end of the wire rod, which was conventionally performed manually, can be automatically performed in a series of feeding steps. There is no need to stop the press machine,
Unattended operation at night, etc. is also possible, which has the effect of significantly improving production efficiency.
【０００７】[0007]
【実施例】以下、本発明の一実施例を添付図面に基づい
て説明する。線材ａの繰出端は、圧造機の線材供給部の
入口に設けられた図示しない一対の送出用ローラで挟圧
されて、図１、２の右側から左側に向かつて一定の供給
経路に沿つて送り出されるようになつている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The feeding end of the wire rod a is pinched by a pair of feed rollers (not shown) provided at the inlet of the wire rod supply section of the press machine, and extends along a certain supply path from the right side to the left side in FIGS. It is being sent out.
【０００８】続いて、切断及び面取部の詳細を説明す
る。基板１上の入口側には線材ａの導入口３を形成した
入口板２が立設され、その導入口３を挟む左右両側に、
線材ａの通過を検知する第１光電スイツチ５が取り付け
られている。Next, details of the cutting and chamfering portion will be described. An inlet plate 2 having an inlet 3 for a wire rod a is erected on the inlet side of the substrate 1, and on both left and right sides sandwiching the inlet 3,
The 1st photoelectric switch 5 which detects passage of the wire rod a is attached.
【０００９】入口板２の前方に立設された取付フレーム
６には、線材ａの案内孔８を有する上下２分割された案
内体７が取り付けられ、第１シリンダ１０のピストンロ
ツド１１の進退によりこれと連結された下側の案内体７
が軸１２回りに揺動して、案内体７を閉じまた開くよう
になつている。A guide body 7 divided into upper and lower parts having a guide hole 8 for a wire rod a is attached to a mounting frame 6 standing upright in front of the inlet plate 2, and is moved by the piston rod 11 of the first cylinder 10 moving back and forth. Lower guide 7 connected to
Swings around the shaft 12 to close and open the guide body 7.
【００１０】その前方に設けられた本体フレーム１４に
は、線材ａの供給方向の前後に間隔をおいて２個の挟持
機１５が装置されている。各挟持機１５は、一対の摺動
杆１６の後端側が本体フレーム１４に形成した軸受孔１
７内に摺動自由に嵌装され、両摺動杆１６の突出側に、
線材ａの供給経路を挟む左右両側に配置され、図４に示
すように、対応面に挟持部１９を設けた一対の挟持体１
８が、一方の挟持体１８は摺動杆１６の一方に固定され
て他方に対しては摺動自由に嵌装され、他方の挟持体１
８はその逆の態様で取り付けられている。各摺動杆１６
の後端側の対応面には夫々ラツク１９が形成されて、そ
の間にピニオン２０がかみ合わされ、一方の摺動杆１６
の後方突出端が第２シリンダ２２のピストンロツド２３
と連結されており、その進退によりラツク１９・ピニオ
ン２０のかみ合いを介して両摺動杆１６が互いに逆向き
に摺動して、左右の挟持体１８が開閉するようになつて
いる。また、前側の挟持機１５の左右の挟持体１８の前
面には、線材ａの通過を検知する第２光電スイツチ２５
が取り付けられている。On the main body frame 14 provided in front of it, two sandwiching machines 15 are arranged at intervals in front of and behind in the feeding direction of the wire rod a. Each holding machine 15 has a bearing hole 1 formed in the body frame 14 on the rear end side of the pair of sliding rods 16.
7 is slidably fitted in the sliding rods 16, and the sliding rods 16 have projecting sides.
A pair of holding bodies 1 arranged on both left and right sides of the supply path of the wire rod a and having a holding portion 19 on the corresponding surface, as shown in FIG.
8, one holding body 18 is fixed to one of the sliding rods 16 and is slidably fitted to the other, and the other holding body 1
8 is mounted in the opposite manner. Each sliding rod 16
A rack 19 is formed on each of the corresponding surfaces on the rear end side, and a pinion 20 is engaged therebetween, and one of the sliding rods 16
The rear protruding end of the piston rod 23 of the second cylinder 22
The sliding rods 16 slide in opposite directions via the engagement of the rack 19 and the pinion 20 by the forward and backward movement thereof, so that the left and right holding bodies 18 are opened and closed. Further, the second photoelectric switch 25 for detecting passage of the wire rod a is provided on the front surface of the left and right holding bodies 18 of the front side holding machine 15.
Is attached.
【００１１】両挟持機１５の間には、回転駆動される丸
鋸歯２８を取付体２７に支持した切断機２６が装備され
ており、図示しないシリンダに連結された取付体２７
が、本体フレーム１４に設けられた軸２９回りに揺動す
ることによつて、図４に示すように、丸鋸歯２８が線材
ａの供給経路上に進出し、また、上方に逃げるようにな
つている。A cutting machine 26 having a circular saw tooth 28, which is rotationally driven, supported by a mounting body 27 is provided between the two holding machines 15, and the mounting body 27 is connected to a cylinder (not shown).
However, by swinging around the shaft 29 provided on the main body frame 14, the circular saw teeth 28 move forward on the supply path of the wire rod a and escape upward as shown in FIG. ing.
【００１２】前側の挟持機１５のさらに前方には、線材
ａの先端を突き当てる線材ストツパ３１が本体フレーム
１４に設けた軸３２により揺動自由に支持され、第３シ
リンダ３３のピストンロツド３４の進退によつて、線材
ａの供給経路上に進出し、また、下方に逃げるようにな
つている。Further in front of the front side clamping device 15, a wire rod stopper 31 for abutting the tip of the wire rod a is swingably supported by a shaft 32 provided on the main body frame 14, and a piston rod 34 of a third cylinder 33 is moved forward and backward. Thus, the wire a is advanced on the supply path and is escaped downward.
【００１３】その前方には、第１テーブル３６が基板１
上に敷設したレール３７を案内として、線材ａの供給方
向と直角方向の移動自由に装置され、その上に、第２テ
ーブル３８が、第１テーブル３６上に敷設したレール３
９を案内として線材ａの供給方向と平行な方向の移動自
由に装置されている。その第２テーブル３８上に取り付
けられた軸受筒４１内には、回転軸４２がベアリング４
３を介して回転自由に支持され、その線材ａの入口側を
向いた端部に、面取り用面４６を先端に穿設した面取具
４５が取り付けられ、回転軸４２の反対側の端部に取り
付けられた被動プーリ４８と、第２テーブル３８上に設
置されたモータ４９の出力軸に取り付けられた駆動プー
リ５０との間にＶベルト５１が掛け渡されている。A first table 36 is provided in front of the substrate 1
The rail 37 laid on the upper side is used as a guide to move freely in the direction perpendicular to the supply direction of the wire rod a, on which the second table 38 is laid, and the rail 3 laid on the first table 36.
9 is used as a guide to freely move in a direction parallel to the supply direction of the wire a. The rotating shaft 42 is installed in the bearing cylinder 41 mounted on the second table 38.
3 is rotatably supported via a chamfering tool 45 having a chamfering surface 46 at its tip and is attached to the end of the wire a facing the inlet side, and the opposite end of the rotary shaft 42. A V-belt 51 is stretched between a driven pulley 48 mounted on the second table 38 and a drive pulley 50 mounted on the output shaft of a motor 49 mounted on the second table 38.
【００１４】また、第１テーブル３６上の、上記した面
取具４５から一定間隔をおいて側方には、案内管５３が
取付体５４により取り付けられている。A guide tube 53 is attached to the first table 36 laterally from the chamfering tool 45 at a constant distance by an attachment body 54.
【００１５】第１テーブル３６は、図３に示すように、
その下面に突設した連結部５６が、基板１上に取り付け
られた第４シリンダ５７のピストンロツド５８と連結さ
れ、その伸長により連結部５６がテーブルストツパ５９
に突き当たるまで前進して、面取具４５が線材ａの供給
経路上に進出し、一方、ピストンロツド５８の収縮によ
り後退して、面取具４５が供給経路の側方に逃げるとと
もに案内管５３が代わつて供給経路上に位置するように
なつている。The first table 36, as shown in FIG.
The connecting portion 56 protruding from the lower surface is connected to the piston rod 58 of the fourth cylinder 57 mounted on the substrate 1, and the extension of the connecting portion 56 causes the connecting portion 56 to move to the table stopper 59.
The chamfering tool 45 advances to the supply path of the wire rod a, while the chamfering tool 45 retracts due to the contraction of the piston rod 58, and the chamfering tool 45 escapes to the side of the supply path and the guide tube 53 moves. Instead, it is located on the supply route.
【００１６】第２テーブル３８は、図２に示すように、
その下面に突設した連結部６１が第１テーブル３６上に
取り付けられた第５シリンダ６２のピストンロツド６３
と連結され、その伸長により連結部６１がテーブルスト
ツパ６４に突き当たるまで入口側に前進して、同図の鎖
線に示すように、面取具４５が、線材ストツパ３１で停
止された線材ａの先端と対応する位置まで進出し、一
方、ピストンロツド６３の収縮により後退して、面取具
４５が線材ストツパ３１の揺動経路から退避するように
なつている。The second table 38, as shown in FIG.
A connecting part 61 protruding from the lower surface of the piston rod 63 of the fifth cylinder 62 mounted on the first table 36.
Is connected to the table stopper 64 by the extension thereof, and the chamfering tool 45 moves toward the inlet side until it abuts the table stopper 64, and the chamfering tool 45 stops the wire rod a stopped by the wire rod stopper 31 as shown by the chain line in FIG. The chamfering tool 45 is retracted from the swing path of the wire rod stopper 31 by advancing to a position corresponding to the tip end and retracting due to contraction of the piston rod 63.
【００１７】次に、本実施例の作動を説明する。線材ａ
の繰出端が送込用ローラにより前方に送り出され、切断
及び面取部の入口板２を通過してそれが検知されると、
案内体７が閉じてその案内孔８から両挟持機１５の夫々
開いた挟持体１８の間を通つて前方に進み、前側の挟持
機１５を通過してそれが検知されると、退避していた線
材ストツパ３１が進出して繰出端を突き当てる。そうす
ると、前後の挟持機１５の各挟持体１８が夫々閉じるこ
とにより線材ａが前後２箇所で挟持されて固定され、そ
れとともに線材ａの送りが一旦停止する。次に、退避し
ていた切断機２６の丸鋸歯２８が進出して線材ａを切断
し、前後の挟持機１５が夫々開くことにより切り取られ
た線材ａの先端部分が下方に設けられたシユータ６６内
に落とされる。Next, the operation of this embodiment will be described. Wire a
When the feeding end of is fed forward by the feeding roller, passes through the entrance plate 2 of the cutting and chamfering portion, and is detected,
When the guide body 7 is closed and passes from the guide hole 8 between the open clamp bodies 18 of the two clamps 15 to the front side, and when it passes through the front clamp 15 and is detected, it evacuates. The wire rod stopper 31 advances and hits the feeding end. Then, each of the sandwiching bodies 18 of the front and rear sandwiching machines 15 is closed, so that the wire rod a is sandwiched and fixed at two front and rear positions, and at the same time, the feeding of the wire rod a is stopped. Next, the circular saw teeth 28 of the cutting machine 26 that has been retracted advances to cut the wire rod a, and the front and rear clamping machines 15 open respectively, so that the tip end portion of the wire rod a cut off is provided below the shutter 66. It is dropped inside.
【００１８】切断が終わると、線材ａが再び前方に送り
出され、切断端が線材ストツパ３１に突き当たると、再
び挟持機１５により線材ａが挟持され、線材ストツパ３
１が下方に逃げるのに続いて、第１テーブル３６が図１
の下側に前進して回転駆動された面取具４５が線材ａの
供給経路上に進出するとともに、第２テーブル３８が入
口側に前進して、面取具４５の面取り用面４６が線材ａ
の切断端に押し付けられ、これにより切断端の面取りが
行われて上記の切断の際にできたバリが除去される。When the cutting is completed, the wire rod a is sent forward again, and when the cut end hits the wire rod stopper 31, the wire rod a is pinched by the pinching machine 15 again and the wire rod stopper 3 is pressed.
The first table 36 is shown in FIG.
The chamfering tool 45, which is driven to rotate downward and is driven to rotate, advances into the supply path of the wire rod a, and the second table 38 advances to the inlet side, so that the chamfering surface 46 of the chamfering tool 45 becomes the wire rod. a
Is pressed against the cutting edge of the cutting edge, thereby chamfering the cutting edge and removing burrs formed during the above cutting.
【００１９】面取りが終わると、第２テーブル３８が復
動して面取具４５が切断端から離間し、また、第１テー
ブル３６が復動することにより、面取具４５が供給経路
の側方に逃げ、それに代わつて案内管５３が供給経路上
に進出し、再び両挟持機１５の挟持が解除されて送込用
ローラが起動されることによつて、切断端は案内管５３
を通つて駆動用ローラに送り込まれる。その間に入口側
の案内体７が開かれ、以降の駆動用ローラによる引張駆
動の際に余分な摩擦抵抗が生じないようになつている。When the chamfering is completed, the second table 38 is moved back to separate the chamfering tool 45 from the cutting end, and the first table 36 is moved back to move the chamfering tool 45 to the side of the supply path. The guide tube 53 instead of the guide tube 53 advances toward the supply path, and the nipping of both nipping machines 15 is released again and the feeding roller is activated.
And is fed to the driving roller. In the meantime, the guide body 7 on the inlet side is opened so that additional frictional resistance does not occur during the subsequent pulling drive by the drive roller.
【００２０】このように、線材ａの繰出端の切断に引き
続いて、その切断端の面取りが自動的に行われる。Thus, following the cutting of the feeding end of the wire a, the chamfering of the cutting end is automatically performed.
【図１】本発明の一実施例の一部切欠平面図である。FIG. 1 is a partially cutaway plan view of an embodiment of the present invention.
【図２】その一部切欠正面図である。FIG. 2 is a partially cutaway front view of the same.
【図３】その側面図である。FIG. 3 is a side view thereof.
【図４】挟持機の断面図である。FIG. 4 is a cross-sectional view of a sandwiching machine.
ａ：線材 １５：挟持機 ２２：第２シリンダ ３１：
線材ストツパ ３３：第３シリンダ ３６：第１テーブ
ル ３７：レール ３８：第２テーブル ３９：レール
４１：軸受体 ４２：回転軸 ４５：面取具 ４９：
モータ ５１：Ｖベルト ５７：第４シリンダ ６２：
第５シリンダa: Wire material 15: Clamping machine 22: Second cylinder 31:
Wire rod stopper 33: Third cylinder 36: First table 37: Rail 38: Second table 39: Rail 41: Bearing body 42: Rotating shaft 45: Chamfer 49:
Motor 51: V-belt 57: Fourth cylinder 62:
5th cylinder
Claims (1)
対の送込用ローラで挟圧して送り出し、その繰出端を途
中で切断部材により一定長切断したのち、前方に設けた
一対の駆動用ローラに引き渡して線材をコイルから引張
供給するようにした線材供給装置に付設されて、線材の
前記切断端を自動的に面取りするための装置であつて、
前記切断端が一定位置で停止するように線材を挟持しか
つその挟持を解除し得る挟持部材を設けるとともに、前
記切断端に前方から当接することによりその面取りを行
う面取具を、線材の供給経路上とその側方との間で進退
可能に、かつ、前記供給経路上に沿つた進退可能に装置
したことを特徴とする線材供給装置における切断端自動
面取装置。Claim: What is claimed is: 1. A feeding end of a wire wound in a coil shape is clamped by a pair of feeding rollers and fed out, and the feeding end is cut to a predetermined length by a cutting member, A device for automatically chamfering the cut end of the wire rod, which is attached to a wire rod feeding device for feeding the wire rod by pulling it from a coil to a pair of driving rollers provided in front,
Supplying the wire rod with a chamfering tool that clamps the wire rod so that the cut end stops at a fixed position and that can release the pinch, and chamfers by abutting the cut end from the front. An automatic cutting edge chamfering device in a wire rod feeding device, which is capable of advancing and retreating between a path and its side and advancing and retracting along the supply path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3183068A JPH07102397B2 (en) | 1991-06-26 | 1991-06-26 | Automatic cutting edge chamfering device in wire feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3183068A JPH07102397B2 (en) | 1991-06-26 | 1991-06-26 | Automatic cutting edge chamfering device in wire feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05318A true JPH05318A (en) | 1993-01-08 |
| JPH07102397B2 JPH07102397B2 (en) | 1995-11-08 |
Family
ID=16129189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3183068A Expired - Fee Related JPH07102397B2 (en) | 1991-06-26 | 1991-06-26 | Automatic cutting edge chamfering device in wire feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07102397B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100590786B1 (en) * | 1998-11-16 | 2006-08-30 | 한라공조주식회사 | Cutting apparatus for tube of heat exchanger |
| KR100785126B1 (en) * | 2006-07-25 | 2007-12-11 | 성명기 | Apparatus for chamfering of wire member and method for chamfering thereof |
| CN111673564A (en) * | 2020-05-27 | 2020-09-18 | 永康市锦鸥机械有限公司 | Square tube chamfering machine |
| CN109482786B (en) * | 2018-12-28 | 2024-04-16 | 江苏信息职业技术学院 | Automatic cutting machine for short wire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601463A (en) * | 1983-06-20 | 1985-01-07 | Nissan Motor Co Ltd | Slip controlling apparatus for torque converter |
-
1991
- 1991-06-26 JP JP3183068A patent/JPH07102397B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601463A (en) * | 1983-06-20 | 1985-01-07 | Nissan Motor Co Ltd | Slip controlling apparatus for torque converter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100590786B1 (en) * | 1998-11-16 | 2006-08-30 | 한라공조주식회사 | Cutting apparatus for tube of heat exchanger |
| KR100785126B1 (en) * | 2006-07-25 | 2007-12-11 | 성명기 | Apparatus for chamfering of wire member and method for chamfering thereof |
| CN109482786B (en) * | 2018-12-28 | 2024-04-16 | 江苏信息职业技术学院 | Automatic cutting machine for short wire |
| CN111673564A (en) * | 2020-05-27 | 2020-09-18 | 永康市锦鸥机械有限公司 | Square tube chamfering machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07102397B2 (en) | 1995-11-08 |
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