JPH08108238A - Swing cutting type wire rod cutting device of coiling machine - Google Patents

Swing cutting type wire rod cutting device of coiling machine

Info

Publication number
JPH08108238A
JPH08108238A JP27026294A JP27026294A JPH08108238A JP H08108238 A JPH08108238 A JP H08108238A JP 27026294 A JP27026294 A JP 27026294A JP 27026294 A JP27026294 A JP 27026294A JP H08108238 A JPH08108238 A JP H08108238A
Authority
JP
Japan
Prior art keywords
cutting
cam
swing
wire rod
cutting tool
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
Application number
JP27026294A
Other languages
Japanese (ja)
Other versions
JP2978075B2 (en
Inventor
Norifumi Abiru
憲史 阿比留
Eiji Obayashi
栄次 大林
Hisashi Shibata
久 柴田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Seiki Manufacturing Co Ltd
Original Assignee
Asahi Seiki Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Seiki Manufacturing Co Ltd filed Critical Asahi Seiki Manufacturing Co Ltd
Priority to JP6270262A priority Critical patent/JP2978075B2/en
Publication of JPH08108238A publication Critical patent/JPH08108238A/en
Application granted granted Critical
Publication of JP2978075B2 publication Critical patent/JP2978075B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Shearing Machines (AREA)
  • Wire Processing (AREA)

Abstract

PURPOSE: To select the most appropriate locus of a blade so as to always obtain clean cutting face by arbitrarily set the cutting tool arranged facing to a mandrel to the locus of a wedge shape blade by means of the action two cans for straight advancing and oscillating. CONSTITUTION: A straight advancing cam 23 and an oscillating cam 24 are turned, an oscillating base 13 is oscillated by the action of an oscillating cam 24 only around an oscillating center shaft 14 clockwise, the wedge shape blade 9a of cutting tool 9 reaches the final position. A coil spring is detached from the cut part as torn off, a broken face, which each chamfer plastic deformed by the wedge shape blade 7a of mandrel 7 and a wedge shape blade 9a of cutting tool 9 is separated by fracture extended, is formed at the cut part. By this method, no burr protruding from the outer/inner peripheries of coil and no sharp part of broken face are formed to the cut face.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はコイリングマシンの成形
ツールにより所望の巻き数に成形されたコイルばねを切
断ツールと芯金との協働で切断して線材から切り離す線
材切断装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod cutting device for cutting a coil spring formed into a desired number of turns by a forming tool of a coiling machine by a cooperation of a cutting tool and a core metal to separate it from a wire rod. .

【0002】[0002]

【従来の技術】従来、コイリングマシンの線材切断装置
は、図5のコイル切断部の拡大図に示すように、ほぼD
字形の芯金97の上方から切断ツール99を下降させ、
芯金97上端の切刃と切断ツール99の下端の切刃とで
コイルばねSを切断して、線材Wから切り離す直線切断
が普通であった。ところが、芯金97と切断ツール99
は、互いに当接するのを防止するため所定の隙間δを形
成する必要がある。
2. Description of the Related Art Conventionally, a wire rod cutting device of a coiling machine has a D-type cutting device as shown in an enlarged view of a coil cutting portion of FIG.
Lower the cutting tool 99 from above the V-shaped cored bar 97,
A straight line cutting in which the coil spring S is cut by the upper cutting edge of the cored bar 97 and the lower cutting edge of the cutting tool 99 to separate it from the wire W is common. However, the core metal 97 and the cutting tool 99
Need to form a predetermined gap δ to prevent them from coming into contact with each other.

【0003】このため例えば社団法人日本機械学会から
昭和62年4月15日に発行された「機械工学便覧(新
版)」第B2編加工学・加工装置の欄の第106頁に記
載された第4章塑性加工の第4・2・5項せん断加工な
どで周知のとおり、線材Wの切断部は切断ツール99の
下降による剪断作用によって芯金97と切断ツール99
の切刃が線材Wに食い込み、更に切断ツール99を下降
させ、それぞれの切刃の食い込みが進行すると、図5
(b)に示すようにそれぞれの刃先の尖端付近から「亀
裂Cr」が発生する。
For this reason, for example, the "Handbook of Mechanical Engineering (New Edition)" issued by the Japan Society of Mechanical Engineers on April 15, 1987, Volume B2, Processing Science / Processing Equipment, page 106 As is well known in Chapter 4, Plastic Working, Section 4, 2.5, and Shearing, the cutting portion of the wire W is cut by the lowering of the cutting tool 99 so that the core metal 97 and the cutting tool 99 are cut.
When the cutting edge of the cutting tool bites into the wire W, the cutting tool 99 is further lowered, and the cutting edge of each cutting blade advances, as shown in FIG.
As shown in (b), "crack Cr" occurs near the tip of each blade.

【0004】引続き切断ツール99を下降させると、切
断部は破断分離するが、それぞれの切断部の切り口面
は、図5(c)に示すように芯金97の切刃と切断ツー
ル99の切刃とによって引込まれて生じた「だれTr」
と、切刃に接してバニシされた塑性変形による「剪断面
Sf」と、前記「亀裂Cr」によって分離した「破断面
Bf」と、かど部に生ずるコイル内外周から突出した
「かえりBu」とが形成される。このコイル内外周から
突出した「かえりBu」は隙間δの値によって大きさが
変化するが、隙間δが存在する限り無くなることはな
い。
When the cutting tool 99 is subsequently lowered, the cutting portions are broken and separated, but the cut surfaces of the respective cutting portions are cut by the cutting edge of the core metal 97 and the cutting tool 99 as shown in FIG. 5 (c). "Who Tr" caused by being pulled in by the blade
A “shear surface Sf” due to plastic deformation that is burnt in contact with the cutting edge, a “fracture surface Bf” separated by the “crack Cr”, and a “burr Bu” protruding from the inner and outer circumferences of the coil generated at the corner. Is formed. The size of the “burr Bu” protruding from the inner and outer circumferences of the coil changes depending on the value of the gap δ, but does not disappear as long as the gap δ exists.

【0005】このような「かえりBu」が切り口面にあ
るコイルばねを、例えば熱可塑性樹脂から構成される電
気機器などに組み付ける場合、構成部品に疵をつけ、欠
陥の原因となる。また、金属などによって構成される機
器に「かえりBu」のあるコイルばねが組み付けられる
場合、「かえりBu」によって、コイルばねの所定組み
付け位置に対してずれが生じ、所定のばね特性が得られ
ない等の欠点があった。
When the coil spring having such a "burr Bu" on the cut surface is assembled to an electric device or the like made of, for example, a thermoplastic resin, the component parts are flawed and cause defects. Further, when a coil spring having a "burr Bu" is assembled to a device made of metal or the like, the "burr Bu" causes a deviation from a predetermined assembly position of the coil spring, and a predetermined spring characteristic cannot be obtained. There were drawbacks such as.

【0006】このような「かえりBu」が出ない線材切
断として開発された技術に図6に示す回転切断がある。
この回転切断は、切断ツール109の楔状切刃109a
を仮想線に示す軌跡aのように円運動させることによ
り、切断ツール109の下降側移動で芯金107の楔状
切刃107aと切断ツール109の楔状切刃109aが
線材Wに食い込み、上下にV字状に塑性変形された「面
取りCh」が形成され、食い込みが進むと図6(b)に
示すように切刃の尖端付近から「亀裂Cr」が発生す
る。
Rotational cutting shown in FIG. 6 is a technique developed as a wire rod cutting method in which such "burr Bu" does not appear.
This rotary cutting is performed by the wedge-shaped cutting edge 109a of the cutting tool 109.
By moving the cutting tool 109 in a descending direction, the wedge-shaped cutting edge 107a of the core metal 107 and the wedge-shaped cutting edge 109a of the cutting tool 109 bite into the wire W and move up and down by V. A “chamfer Ch” that is plastically deformed into a letter shape is formed, and as the biting progresses, a “crack Cr” occurs near the tip of the cutting edge as shown in FIG. 6B.

【0007】続いて切断ツール109の芯金より離れる
斜め方向の下降側移動で、図6(c)に示すようにコイ
ルばねSを線材から引き裂くように切断するものであ
る。この回転切断によれば楔状切刃107a,109a
が線材Wの上下にV字状「面取りCh」を形成すること
により「かえりBu」の発生を防止することができる
が、円運動によりコイル成形位置のスペースが狭くなる
という欠点が生じるので、円運動を楕円運動とすること
によりコイル成形位置のスペースが広く取れるように構
成されている。
Subsequently, the cutting tool 109 is moved in a descending direction in an oblique direction away from the core bar to cut the coil spring S so as to tear it from the wire as shown in FIG. 6 (c). According to this rotary cutting, the wedge-shaped cutting edges 107a, 109a
By forming V-shaped “chamfered Ch” on the top and bottom of the wire W, it is possible to prevent the occurrence of “burr Bu”, but there is a disadvantage that the circular movement narrows the space at the coil forming position. By making the motion an elliptical motion, a large space for the coil forming position can be provided.

【0008】このような回転切断と前述の直線切断を選
択的に行う線材切断装置を備えるばね巻き機に、特開平
4−284934号で公知の技術がある。このばね巻き
機の回転切断を行う線材切断装置は、図7に示すように
揺動中心軸111を中心として揺動可能な揺動台112
を直線移動可能にツールホルダ113を設け、ツールホ
ルダ113の上端部と、クランク114のクランクピン
部114aとをコンロッド部材115,115,115
で連結して、クランク114の回動でツールホルダ11
3を上下動させると同時に、クランク114の軸部に嵌
着されたカム116によりレバー117を介して揺動台
112を揺動させることにより切断ツール118の切刃
部をたて長の楕円運動させるものである。
As a spring winding machine equipped with a wire rod cutting device for selectively performing such rotary cutting and the above-described straight line cutting, there is a technique known in Japanese Patent Laid-Open No. 4-284934. As shown in FIG. 7, a wire rod cutting device for rotationally cutting a spring winding machine includes a rocking table 112 that can rock about a rocking center shaft 111.
The tool holder 113 is provided so as to be linearly movable, and the upper end portion of the tool holder 113 and the crank pin portion 114a of the crank 114 are connected to the connecting rod members 115, 115, 115.
And the tool holder 11 is rotated by rotating the crank 114.
3 is moved up and down, and at the same time, the rocking base 112 is swung by the cam 116 fitted to the shaft portion of the crank 114 via the lever 117, so that the cutting blade portion of the cutting tool 118 is vertically elliptic. It is what makes me.

【0009】[0009]

【発明が解決しようとする課題】従来の技術で述べた特
開平4−284934号で公知の、楕円運動により回転
切断を行う線材切断装置は、図6(d)に示すように
「面取りCh」に続く「破断面Bf」が斜めになり「ば
り」に似た「尖り部b」ができ易い。この「尖り部b」
は、線材Wの材質と線径とによって異なり、特に粘性が
高くかつ線径が小さいほど線材断面積に対して大きく出
る傾向が強く、コイルばねの品質を損ない、最悪の場合
不良品となるという問題を有している。
A wire rod cutting device, which is known in Japanese Patent Laid-Open No. 4-284934 described in the prior art and which performs rotary cutting by elliptical motion, has a "chamfering Ch" as shown in FIG. 6 (d). The "fracture surface Bf" following "becomes slanted, and a" pointed portion b "similar to a" burr "is likely to be formed. This "pointed part b"
Is different depending on the material and the wire diameter of the wire W, and in particular, the higher the viscosity and the smaller the wire diameter, the greater the tendency for the wire cross-sectional area to become larger, which impairs the quality of the coil spring and, in the worst case, is a defective product. I have a problem.

【0010】この「尖り部b」を出来るだけ小さくする
ためには楔状切刃により塑性加工されたV字状の面取り
(食い込み)量を最適に調整して、「亀裂Cr」を引き
裂くように破断分離する必要があるが、特に線径が小さ
い線材の場合は、楕円運動による回転切断では面取り量
を微妙に調整することが難しいので「尖り部b」ができ
易いという問題を有している。
In order to make this "pointed portion b" as small as possible, the amount of V-shaped chamfering (biting) plastically processed by a wedge-shaped cutting edge is adjusted optimally, and the "crack Cr" is broken to tear it. Although it is necessary to separate the wires, particularly in the case of a wire material having a small wire diameter, it is difficult to finely adjust the chamfering amount by rotational cutting by elliptic motion, and thus there is a problem that the "pointed portion b" is easily formed.

【0011】本発明は従来の技術の有するこのような問
題点に鑑みなされたものであり、その目的とするところ
は、2枚のカムによる直線運動と揺動運動とを自由に組
み合わせることにより、従来の直線切断及び回転切断は
勿論ほぼ三角形状等線材の材質・線径に最も適した切断
ツールの切刃の移動軌跡を任意に設定することができる
構造として、線径の小さい粘性の高い切断し難い線材に
おいても、図5(c)に示す「かえりBu」や図6
(b)に示す「尖り部b」の無い綺麗な切断面が得ら
れ、更にコイル成形位置のスペースを狭めることのない
スイング式線材切断装置を提供しようとするものであ
る。
The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to freely combine the linear motion and the oscillating motion by two cams. In addition to conventional straight line cutting and rotary cutting, it is possible to set the movement locus of the cutting blade of the cutting tool most suitable for the material and wire diameter of the substantially triangular iso-wire material, as a structure with a small wire diameter and high viscosity. Even in the case of difficult-to-handle wire rods, the "burred Bu" shown in FIG.
It is an object of the present invention to provide a swing type wire rod cutting device which can obtain a clean cutting surface without the "pointed portion b" shown in (b) and further does not narrow the space at the coil forming position.

【0012】[0012]

【課題を解決するための手段】上記目的を達成するため
に本発明におけるコイリングマシンのスイングカット式
線材切断装置は、コイリングマシンの成形ツールにより
所望の巻き数に成形されたコイルばねを芯金と切断ツー
ルとで切断して線材から切り離す線材切断装置におい
て、上端部に楔状切刃が形成され成形位置のコイルばね
内に突出するように前板に取着された芯金と、下端部に
楔状切刃が形成され前記芯金と協働で線材を切断する切
断ツールと、前記前板に該前板の表面と平行に揺動可能
に支持された首振り台と、前記首振り台より反芯金側に
離れた位置の前板に貫通するように枢着される回転軸の
先端に着脱可能に取着された直進用と揺動用の2枚のカ
ムと、前記首振り台に前記芯金に向かって直線移動可能
に設けられ先端部に前記切断ツールが着脱可能に取着さ
れ後端部に前記直進用カムに当接する第1カムフオロア
が枢支されるスライドと、前記首振り台に一端部が固着
され他端部に前記揺動用カムと当接する第2カムフオロ
アが枢着されるアームと、前記回転軸を駆動する手段
と、前記第1カムフオロアが前記直進用カムに当接する
ように付勢する第1ばねと、前記第2カムフオロアが前
記揺動用カムに当接するように付勢する第2ばねとを備
えてなり、2枚のカムの形状により切断ツールの楔状切
刃の動作軌跡を任意に設定できるものである。
In order to achieve the above object, a swing-cut type wire rod cutting device for a coiling machine according to the present invention uses a coil spring formed into a desired number of turns by a forming tool of the coiling machine as a core metal. In a wire rod cutting device that cuts with a cutting tool and separates it from the wire rod, a wedge-shaped cutting edge is formed at the upper end and a core metal attached to the front plate so as to project into the coil spring at the forming position, and a wedge-shaped end at the lower end. A cutting tool having a cutting edge formed thereon to cut a wire rod in cooperation with the core bar, a swing table supported by the front plate so as to be swingable in parallel with the surface of the front plate, and Two cams for rectilinear movement and swinging, which are detachably attached to the tip of a rotary shaft pivotally attached so as to penetrate the front plate at a position distant from the core metal, and the core on the swing table. It is provided so that it can move in a straight line toward the gold A slide in which a cutting tool is removably attached and a rear end of which is pivotally supported by a first cam follower that abuts against the straight-moving cam, and one end of which is fixed to the swing table and the other end of which is the swing cam. An arm to which a second cam follower is abutted, a means for driving the rotary shaft, a first spring for biasing the first cam follower to abut the straight cam, and a second cam follower. A second spring that urges the swinging cam so as to come into contact with the swinging cam is provided, and the movement locus of the wedge-shaped cutting edge of the cutting tool can be arbitrarily set by the shapes of the two cams.

【0013】また直進用と揺動用の2枚のカムは回転軸
にそれぞれ位相変更可能に取着されたものである。
The two cams, one for straight movement and the other for swinging, are attached to the rotary shaft so that their phases can be changed.

【0014】[0014]

【作用】上述のように構成された本発明の作用について
説明する。回転軸を共有する直進用カムと揺動用カムの
回動により、スライドの直進と、このスライドを摺動可
能に支持する首振り台の揺動とを行うようにして、スラ
イド先端部に取着の切断ツールの楔状切刃の移動軌跡を
任意に設定可能にし、例えば切断ツールの楔状切刃が直
進用カムのみのカム形状の作用で上端位置から垂直に下
降して、芯金の楔状切刃と切断ツールの楔状切刃とが線
材に食い込んで、V字状の塑性変形された「面取り」を
形成するとともに、両切刃が対向する方向に「亀裂」を
発生させ、続いて揺動用カムのみのカム形状の作用で、
切断ツールの楔状切刃が、「亀裂」が成長して破断する
ように横方向に移動して、線材からコイルばねを切り離
す線材切断動作を行わせることも可能であり、「かえ
り」や破断面に「尖り部」のでき易い難切断材に最適な
切断ツールの切刃の移動軌跡を任意選択することができ
る。
The operation of the present invention constructed as described above will be described. By rotating the straight-moving cam and the swing-moving cam that share the rotation axis, the slide moves straight and the swing table that slidably supports the slide swings, and is attached to the slide tip. The moving locus of the wedge-shaped cutting edge of the cutting tool can be set arbitrarily.For example, the wedge-shaped cutting edge of the cutting tool vertically descends from the upper end position due to the cam shape of only the straight-moving cam, and the wedge-shaped cutting edge of the core metal. And the wedge-shaped cutting edge of the cutting tool bite into the wire to form a V-shaped plastically deformed "chamfer", and also generate a "crack" in the direction in which both cutting edges face each other, and then the swing cam. By the action of the only cam shape,
It is also possible to move the wedge-shaped cutting edge of the cutting tool laterally so that a "crack" grows and breaks, and to perform a wire rod cutting operation that separates the coil spring from the wire rod. It is possible to arbitrarily select the movement locus of the cutting blade of the cutting tool that is most suitable for difficult-to-cut materials that easily have "pointed portions".

【0015】また、回転軸に取着の直進用カムと揺動用
カムとの取付穴を例えば円弧状の長穴にすることにより
位相変更可能とし、それぞれの位相を変えることにより
切断ツールの楔状切刃の移動軌跡の微調整が容易となり
段取時間が減少する。
Further, the mounting holes for the straight-moving cam and the swinging cam, which are attached to the rotary shaft, can be changed by, for example, arc-shaped elongated holes, and the wedge-shaped cutting of the cutting tool can be performed by changing the respective phases. Fine adjustment of the moving path of the blade is facilitated and setup time is reduced.

【0016】[0016]

【実施例】以下本発明の実施例について図面にもとづい
て説明する。図1,図2は右巻きコイルばねの成形およ
び線材切断の構成を示す図であり、左巻きコイルばねの
成形および線材切断に際しては、成形および線材切断の
作用をする構成要素を、後述の図1の線ガイド4の水平
軸線に対して上下対称に配設して構成する。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 are views showing a configuration of forming a right-handed coil spring and cutting a wire rod. When forming a left-handed coil spring and cutting a wire rod, the constituent elements that act for forming and cutting the wire rod are described in FIG. The line guide 4 is arranged symmetrically with respect to the horizontal axis.

【0017】図1は、コイリングマシン全体の構成を示
す正面図で、機台1に立設された前板2の前面に、線材
Wを挿通して案内する線ガイド4が水平に取着されてい
て、線材Wを挟持して前方(右側)に送り出す複数の送
りローラ5が線ガイド4の後方(左側)に設けられてい
る。更に線ガイド4の前方に、線材Wを所定の曲率のコ
イルCに成形する成形ツール6F,6Sと、コイルCを
成形方向に押圧して所定のピッチを形成するピッチツー
ル8が、成形位置10のコイルC中心に向かってそれぞ
れ進退可能に取着されている。
FIG. 1 is a front view showing the entire structure of the coiling machine. A wire guide 4 for inserting and guiding a wire W is horizontally attached to the front surface of a front plate 2 erected on a machine base 1. In addition, a plurality of feed rollers 5 that sandwich the wire W and feed it forward (right side) are provided behind the line guide 4 (left side). Further, in front of the wire guide 4, forming tools 6F and 6S for forming the wire W into a coil C having a predetermined curvature and a pitch tool 8 for pressing the coil C in the forming direction to form a predetermined pitch are formed at a forming position 10. The coils C are attached so as to be able to move forward and backward.

【0018】芯金7は成形位置10のコイルC内に突出
するように前板2に取着されていて断面がほぼ半円で上
端部に図2(a)に示す楔状切刃7aが形成されてい
る。この芯金7と協働で線材Wを切断する切断ツール9
は、下端部に図2(a)に示す楔状切刃9aが形成され
ていて、芯金7の楔状切刃7aと対向する上方位置で、
線材切断装置11のスライド12に着脱可能に取着され
ている。
The cored bar 7 is attached to the front plate 2 so as to project into the coil C at the molding position 10, has a substantially semicircular cross section, and has a wedge-shaped cutting edge 7a shown in FIG. Has been done. Cutting tool 9 for cutting the wire W in cooperation with the core metal 7
2 has a wedge-shaped cutting edge 9a shown in FIG. 2 (a) formed at the lower end thereof, and at the upper position facing the wedge-shaped cutting edge 7a of the core metal 7,
It is detachably attached to the slide 12 of the wire rod cutting device 11.

【0019】スライド12を上下に滑動可能に支持する
首振り台13は、揺動中心軸14により前板2に揺動可
能に支持されており、スライド12には上端部に取付穴
が長穴16aに形成されたローラ台16がボルト17に
より上下に位置調整可能に取着されている。ローラ台1
6には第1カムフオロア15が枢支され、下端に調整ね
じ18が垂直方向下向きに螺着されていて、調整ねじ1
8の下端がスライド12の段差部端面12aに当接し
て、スライド12に対するローラ台16の上下位置を変
えることにより、切断ツール9の上下位置を調整するよ
うになっている。
A swing base 13 that slidably supports the slide 12 in the vertical direction is swingably supported by the front plate 2 by a swing center shaft 14, and the slide 12 has an elongated mounting hole at its upper end. A roller base 16 formed on 16a is attached by bolts 17 so that the position can be adjusted vertically. Roller stand 1
A first cam follower 15 is pivotally supported by 6, and an adjusting screw 18 is screwed vertically downward to the lower end of the adjusting cam 1.
The lower end of 8 is brought into contact with the end surface 12a of the step portion of the slide 12, and the vertical position of the roller base 16 with respect to the slide 12 is changed, whereby the vertical position of the cutting tool 9 is adjusted.

【0020】更に前板2の首振り台13の上方位置に軸
受ハウジング21が前板2を貫通して取着されており、
軸受ハウジング21に複数の軸受により回転軸22が枢
支されていて、回転軸22の先端フランジ部に直進カム
23とその直進カム23に揺動カム24の2枚の板カム
が着脱可能に取着されている。そして揺動カム24は直
進カム23にボルト25により螺着され、直進カム24
はボルト26により回転軸22のフランジ部端面に螺着
されていて、直進カム23に穿設されているそれぞれの
ボルト穴を回転軸心を中心とする図示しない円弧状の長
穴に形成することにより、直進カム23及び揺動カム2
4の回転軸22との位相及びカム相互の位相を変えるこ
とができる。
Further, a bearing housing 21 is attached through the front plate 2 at a position above the swing base 13 of the front plate 2,
A rotary shaft 22 is pivotally supported by a plurality of bearings in a bearing housing 21, and a straight cam 23 is attached to a tip flange portion of the rotary shaft 22 and two plate cams of a swing cam 24 are detachably attached to the straight cam 23. It is worn. The swing cam 24 is screwed to the rectilinear cam 23 with a bolt 25, and the rectilinear cam 24
Are bolted to the end face of the flange portion of the rotary shaft 22 by bolts 26, and each bolt hole formed in the straight-moving cam 23 is formed in an arc-shaped elongated hole not shown centering on the rotary shaft center. Thus, the rectilinear cam 23 and the swing cam 2
It is possible to change the phase of the No. 4 rotary shaft 22 and the phase of the cams.

【0021】スライド12は2本のばね19,19によ
り上方に付勢されていて、第1カムフオロア15は常時
直進カム23のカム面に圧接されている。更に首振り台
13の右肩部にアーム27の一端部が取着されていて、
アーム27の他端部に第2カムフオロア28が枢支され
ており、アーム27は前板2に固着のばね箱29内に張
設されるばね31により押し子32を介して図2(a)
で反時計方向に付勢され、第2カムフオロア28は常時
揺動カム24のカム面に圧接されている。
The slide 12 is biased upward by two springs 19 and 19, and the first cam follower 15 is constantly in pressure contact with the cam surface of the rectilinear cam 23. Furthermore, one end of the arm 27 is attached to the right shoulder of the swing table 13,
A second cam follower 28 is pivotally supported at the other end of the arm 27, and the arm 27 is supported by a spring 31 stretched in a spring box 29 fixed to the front plate 2 via a pusher 32 as shown in FIG.
The second cam follower 28 is constantly pressed against the cam surface of the swing cam 24.

【0022】回転軸22を駆動するためのモータ33
は、図示しない後板に取着されていて、モータ33の出
力軸33aに嵌着される歯車34が回転軸22の後端部
に嵌着される歯車35に噛合されており、回転軸22は
モータ33によりコイルばねのコイル成形機構と連動し
て1サイクルに1回転ずつ回転するようになっている。
更に首振り台13には図示しない3本の取付ボルトによ
り前板2にほぼ垂直に固着するためのボルト穴13aが
穿設されていて、首振り台13を前板2に固着した場合
は、揺動カム24を取除き、スライド12の直線運動の
みとして左巻きコイルばね成形時のピッチツール装置と
することができる。
A motor 33 for driving the rotary shaft 22
Is attached to a rear plate (not shown), and the gear 34 fitted to the output shaft 33a of the motor 33 is meshed with the gear 35 fitted to the rear end of the rotary shaft 22. Is rotated by a motor 33 in association with a coil forming mechanism of a coil spring, one rotation per cycle.
Further, the swing table 13 is provided with bolt holes 13a for fixing it substantially vertically to the front plate 2 by three mounting bolts (not shown), and when the swing table 13 is fixed to the front plate 2, The swinging cam 24 can be removed, and only the linear movement of the slide 12 can be used as the pitch tool device for forming the left-handed coil spring.

【0023】続いて上述のように構成された本実施例の
作用について図3,図4の線材切断動作図によって説明
する。図3(a),図4(a)は線材切断前の状態を示
す図で、回転軸22の回転により直進カム23及び揺動
カム24が所定の待機位置に達した位置で停止し、切断
ツール9は芯金7と対向する上方位置9uで待機してい
る。
Next, the operation of the present embodiment constructed as described above will be described with reference to the wire rod cutting operation diagrams of FIGS. 3 (a) and 4 (a) are views showing the state before cutting the wire rod, in which the rotation of the rotary shaft 22 causes the rectilinear cam 23 and the swing cam 24 to stop at a position where they have reached a predetermined standby position, and the wire is cut. The tool 9 stands by at an upper position 9u facing the cored bar 7.

【0024】そして、コイル成形が進んで所定長に達
し、線材Wの送りが停止された信号でモータ33が回転
し、回転軸22,直進カム23,揺動カム24が回転さ
れ、直進カム23のみの作用で切断ツール9がスライド
12とともに下降し、切断ツール9の楔状切刃9aが線
材Wの切断部に当接したのち更に下降して、上端位置9
uから切断初期の位置9mに達し、図3(b),図4
(b)に示す状態となる。
Then, the coil forming progresses to reach a predetermined length, the motor 33 is rotated by a signal that the feeding of the wire W is stopped, the rotary shaft 22, the linear cam 23, and the swing cam 24 are rotated, and the linear cam 23. The cutting tool 9 descends together with the slide 12 by the action of the chisel, and the wedge-shaped cutting blade 9a of the cutting tool 9 comes into contact with the cutting portion of the wire W and then further descends to the upper end position 9
The position 9 m at the initial stage of cutting is reached from u, and the position shown in FIG.
The state shown in FIG.

【0025】この状態で、芯金7の楔状切刃7aと切断
ツール9の楔状切刃9aとが線材Wに上下から食い込
み、V字状に塑性変形されて「面取りCh」が形成され
るとともに、芯金7の楔状切刃7aと切断ツール9の楔
状切刃9aとが対向する方向に「亀裂Cr」が発生す
る。
In this state, the wedge-shaped cutting edge 7a of the core metal 7 and the wedge-shaped cutting edge 9a of the cutting tool 9 bite into the wire W from above and below, and are plastically deformed into a V shape to form "chamfer Ch". A "crack Cr" occurs in the direction in which the wedge-shaped cutting edge 7a of the core metal 7 and the wedge-shaped cutting edge 9a of the cutting tool 9 face each other.

【0026】引続き直進カム23,揺動カム24が回転
され、揺動カム24のみの作用で首振り台13が揺動中
心軸14を中心として時計方向に揺動し、切断ツール9
の楔状切刃9aが切断初期の位置9mから最終位置9d
に達し、図3(c),図4(c)に示す状態となる。こ
の状態で、コイルばねSはコイルCの切断部から引き裂
かれるように切り離され、切断部には図4(d)に示す
ように、芯金7の楔状切刃7aと切断ツール9の楔状切
刃9aとにより塑性変形されたそれぞれの「面取りC
h」と「亀裂Cr」が延長して分離した「破断面Bf」
とが形成される。従って切断部にはコイル内外周から突
出した「かえり」や「破断面Bf」に「尖り部」が形成
されることはない。
Subsequently, the rectilinear cam 23 and the swing cam 24 are rotated, and the swing base 13 swings clockwise around the swing center shaft 14 by the action of only the swing cam 24, and the cutting tool 9
The wedge-shaped cutting edge 9a of the blade is moved from the initial position 9m to the final position 9d.
To reach the state shown in FIGS. 3 (c) and 4 (c). In this state, the coil spring S is separated so as to be torn from the cut portion of the coil C, and the cut portion has a wedge-shaped cutting edge 7a of the core metal 7 and a wedge-shaped cutting of the cutting tool 9 as shown in FIG. 4 (d). Each of the “chamfering C” plastically deformed by the blade 9a
"Fracture surface Bf" where "h" and "crack Cr" are extended and separated
And are formed. Therefore, no "burr" or "pointed portion" is formed in the "broken surface Bf" protruding from the inner and outer circumferences of the coil at the cut portion.

【0027】尚、上述のように楔状切刃9aの移動軌跡
をほぼ直角三角形状とした線材切断は、亀裂を生じさせ
るために「面取りCh」を比較的大きくした方がよく、
線径が大きくなるほど切断ツール9にかかる負荷が大き
くなるが、幸い線材Wの線径が大きいと破断面の「尖り
部」も電気機器などに組み付けられた場合に他の構成部
品に疵をつけたり、位置ずれなどの要因になることは少
ない。
When the wedge-shaped cutting blade 9a has a substantially right-angled triangular shape as described above, it is better to make the "chamfer Ch" relatively large in order to cause cracks.
As the wire diameter increases, the load applied to the cutting tool 9 increases, but fortunately, if the wire diameter of the wire W is large, the "pointed portion" of the fracture surface may be flawed in other components when it is assembled to an electric device or the like. However, it is unlikely to be a cause of misalignment.

【0028】従って線径が大きいコイルばねSには、上
端位置9uと切断初期の位置9mの間の直線と切断初期
の位置9mと最終位置9d間の疑似直線のなす角度θ
を、90°以上にすることで、「面取りCh」の深さを
比較的小さくすることができ、この場合は直進カム23
のカム形状を変えることのみで対応可能である。
Therefore, for the coil spring S having a large wire diameter, an angle θ formed by a straight line between the upper end position 9u and the initial cutting position 9m and a pseudo straight line between the initial cutting position 9m and the final cutting position 9d.
Is 90 ° or more, the depth of the “chamfer Ch” can be made relatively small. In this case, the straight cam 23
It is possible only by changing the cam shape of.

【0029】また、直進カム23と揺動カム24のカム
形状を偏心カムに変えることで、切断ツール9に設けた
楔状切刃9aの軌跡を楕円に変えることも可能で、従来
の回転切断にも対応できる。また、揺動カム24を同心
円の単なる円板に変えることで直線切断にも対応でき、
この場合には円板の径を変えることにより、スライド1
2の移動方向を垂直にも斜めにも変えることが可能であ
る。
By changing the cam shapes of the straight-moving cam 23 and the swinging cam 24 to eccentric cams, it is possible to change the locus of the wedge-shaped cutting blade 9a provided on the cutting tool 9 into an ellipse, which is suitable for conventional rotary cutting. Can also handle. Also, by changing the swing cam 24 to a simple concentric disc, it is possible to cut straight lines.
In this case, slide 1 by changing the diameter of the disc.
It is possible to change the moving direction of 2 vertically or diagonally.

【0030】また、揺動カム24又はアーム27を取り
除き、首振り台13を前板2にボルト締めすることによ
っても、直線切断が可能である。
Straight line cutting is also possible by removing the swing cam 24 or the arm 27 and bolting the swing base 13 to the front plate 2.

【0031】[0031]

【発明の効果】本発明は上述のとおり構成さているので
次に記載する効果を奏する。芯金と対向して配設した切
断ツールを、直進用と揺動用の二枚のカムの作用により
切断ツールに形成された楔状切刃の軌跡を任意に設定で
きるようにしたので、切断面に「かえり」や「尖り部」
ができ易い線材に対して最も適した切刃の軌跡を選択す
ることが可能となり、常に奇麗な切断面が得られること
により不良率が低下し、品質が向上する。また、成形位
置のスペースを狭めることなく切刃の軌跡を自由に選択
することができるので、ばね成形機構の自由度が増し、
生産能率の向上につながる。
Since the present invention is configured as described above, it has the following effects. Since the cutting tool, which is arranged facing the core metal, can set the trajectory of the wedge-shaped cutting edge formed on the cutting tool by the action of the two cams for straight movement and swing, "Back" and "points"
It is possible to select the locus of the cutting edge that is most suitable for a wire rod that is easily formed, and a clean cut surface is always obtained, so that the defective rate is reduced and the quality is improved. Also, since the locus of the cutting edge can be freely selected without narrowing the space of the forming position, the degree of freedom of the spring forming mechanism increases,
It leads to improvement of production efficiency.

【0032】また、二枚のカムを駆動するモータをコイ
ル成形機構と連動とし、成形ツールによって所望のコイ
ル巻き数のコイルばねに形成後、引き続いて自動的に芯
金と切断ツールとでコイルばねを線材から切り離すよう
にしたので、自動化が容易となって省力化及び能率的向
上が図れる。
Further, the motor for driving the two cams is interlocked with the coil forming mechanism to form a coil spring having a desired number of coil windings by the forming tool, and subsequently the coil spring is automatically automatically formed by the core metal and the cutting tool. Since the wire is separated from the wire, automation can be facilitated, and labor saving and efficiency improvement can be achieved.

【0033】また、二枚のカムをそれぞれ位相変更可能
に回転軸に取着できるようにしたので、切断ツールの切
刃の軌跡の初期設定における微調整が容易となり段取時
間が減少する。
Further, since the two cams can be attached to the rotary shaft so that the respective phases can be changed, the fine adjustment in the initial setting of the locus of the cutting edge of the cutting tool is facilitated and the setup time is reduced.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による実施例のスイングカット式線材切
断位置が組み付けられたコイリングマシン全体の構成図
である。
FIG. 1 is a configuration diagram of an entire coiling machine in which a swing cut type wire rod cutting position of an embodiment according to the present invention is assembled.

【図2】本実施例のスイングカット式線材切断装置の構
成図で、線材切断前の状態を示し、(a)は正面図、
(b)は(a)のA−A矢視切断図である。
FIG. 2 is a configuration diagram of a swing cut type wire rod cutting device of the present embodiment, showing a state before the wire rod is cut, (a) is a front view,
(B) is a sectional view taken along the line AA of (a).

【図3】本実施例のスイングカット式切断装置による作
用説明図で、(a)は切断前の状態、(b)は切断初期
の状態、(c)は切断後の状態を表す図である。
3A and 3B are explanatory views of the operation of the swing cut type cutting apparatus of the present embodiment, where FIG. 3A is a state before cutting, FIG. 3B is an initial state of cutting, and FIG. .

【図4】本実施例の作用の線材切断部の拡大説明図で、
(a)は切断前の状態、(b)は切断初期の状態、
(c)は切断後の状態をそれぞれ表し、(d)は線材切
断局部の切断面の形状を表す図である。
FIG. 4 is an enlarged explanatory view of the wire cutting portion of the operation of the present embodiment,
(A) is a state before disconnection, (b) is an initial state of disconnection,
(C) shows the state after cutting, respectively, (d) is a figure showing the shape of the cut surface of a wire rod cutting local part.

【図5】従来の技術の直線切断による作用の線材切断部
の拡大説明図で、(a)は線材切断後の芯金と切断ツー
ルの構成を示し、(b)は線材切断局部の切断初期の状
態を示し、(c)は線材切断局部の切断後の状態を示す
図である。
5A and 5B are enlarged explanatory views of a wire rod cutting portion of an action by a straight line cutting of a conventional technique, FIG. 5A shows a configuration of a core bar and a cutting tool after the wire rod is cut, and FIG. 5B is an initial cutting of the wire rod cutting local portion. And (c) is a diagram showing a state after cutting the wire cutting local portion.

【図6】従来の技術の回転切断による作用の線材切断部
の拡大説明図で、(a)は切断前の状態を示し、(b)
は切断初期の状態を示し、(c)は切断後の状態を示
し、(d)は線材切断局部の切断面の形状を示す図であ
る。
FIG. 6 is an enlarged explanatory view of a wire rod cutting portion of the operation by the conventional rotary cutting, (a) shows a state before cutting, (b)
FIG. 4A is a diagram showing a state at an initial stage of cutting, FIG. 8C is a diagram showing a state after cutting, and FIG.

【図7】従来の技術のばね巻き機の線材切断装置の正面
図である。
FIG. 7 is a front view of a wire cutting device of a conventional spring winding machine.

【符号の説明】[Explanation of symbols]

7 芯金 7a,9a 楔状切刃 9 切断ツール 10 成形位置 11 線材切断装置 12 スライド 13 首振り台 14 揺動中心軸 15 第1カムフオロア 19,31 ばね 22 回転軸 23 直進カム 24 揺動カム 28 第2カムフオロア 33 モータ Bf 破断面 C コイル Ch 面取り Cr 亀裂 S コイルばね Sf 剪断面 W 線材 7 core metal 7a, 9a wedge-shaped cutting blade 9 cutting tool 10 forming position 11 wire rod cutting device 12 slide 13 swinging table 14 swing center shaft 15 first cam follower 19,31 spring 22 rotary shaft 23 rectilinear cam 24 swing cam 28 28th 2 Cam follower 33 Motor Bf Fracture surface C Coil Ch Chamfer Cr Crack S Coil spring Sf Shear surface W Wire rod

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 コイリングマシンの成形ツールにより所
望の巻き数に成形されたコイルばねを芯金と切断ツール
とで切断して線材から切り離す線材切断装置において、
上端部に楔状切刃が形成され成形位置のコイルばね内に
突出するように前板に取着された芯金と、下端部に楔状
切刃が形成され前記芯金と協働で線材を切断する切断ツ
ールと、前記前板に該前板の表面と平行に揺動可能に支
持された首振り台と、前記首振り台より反芯金側に離れ
た位置の前板に貫通するように枢着される回転軸の先端
に着脱可能に取着された直進用と揺動用の2枚のカム
と、前記首振り台に前記芯金に向かって直線移動可能に
設けられ先端部に前記切断ツールが着脱可能に取着され
後端部に前記直進用カムに当接する第1カムフオロアが
枢支されるスライドと、前記首振り台に一端部が固着さ
れ他端部に前記揺動用カムと当接する第2カムフオロア
が枢着されるアームと、前記回転軸を駆動する手段と、
前記第1カムフオロアが前記直進用カムに当接するよう
に付勢する第1ばねと、前記第2カムフオロアが前記揺
動用カムに当接するように付勢する第2ばねとを備えて
なり、2枚のカムの形状により切断ツールの楔状切刃の
動作軌跡を任意に設定できることを特徴とするコイリン
グマシンのスイングカット式線材切断装置。
1. A wire rod cutting device for cutting a coil spring formed into a desired number of turns by a forming tool of a coiling machine with a core metal and a cutting tool to separate the coil spring from a wire rod.
A core metal attached to the front plate so that a wedge-shaped cutting edge is formed at the upper end and protrudes into the coil spring at the forming position, and a wedge-shaped cutting edge is formed at the lower end to cut the wire rod in cooperation with the core metal. A cutting tool, a swing table supported by the front plate so as to be swingable parallel to the surface of the front plate, and a front plate at a position away from the swing table on the side opposite to the core bar. Two cams for rectilinear movement and swinging, which are detachably attached to the tip of the rotating shaft to be pivotally attached, and linearly movable toward the core metal on the swing base, and the cutting is provided at the tip. A slide to which a tool is detachably attached and a first cam follower that abuts against the straight-moving cam is pivotally supported at a rear end, and one end is fixed to the swing base and the swing cam is abutted at the other end. An arm to which a contacting second cam follower is pivotally attached, and means for driving the rotating shaft,
A first spring for urging the first cam follower to come into contact with the straight-moving cam, and a second spring for urging the second cam follower to come into contact with the swing cam. Swing-cut type wire rod cutting device for a coiling machine, characterized in that the movement locus of the wedge-shaped cutting edge of the cutting tool can be set arbitrarily by the shape of the cam.
【請求項2】 直進用と揺動用の2枚のカムは回転軸に
それぞれ位相変更可能に取着されたものである請求項1
記載のコイリングマシンのスイングカット式線材切断装
置。
2. A cam for straight movement and a cam for swinging are attached to a rotary shaft so that the respective phases can be changed.
Swing-cut type wire rod cutting device for the coiling machine described.
JP6270262A 1994-10-07 1994-10-07 Swing cut type wire cutting device for coiling machine Expired - Fee Related JP2978075B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6270262A JP2978075B2 (en) 1994-10-07 1994-10-07 Swing cut type wire cutting device for coiling machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6270262A JP2978075B2 (en) 1994-10-07 1994-10-07 Swing cut type wire cutting device for coiling machine

Publications (2)

Publication Number Publication Date
JPH08108238A true JPH08108238A (en) 1996-04-30
JP2978075B2 JP2978075B2 (en) 1999-11-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP2978075B2 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
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EP0804979A1 (en) * 1996-05-02 1997-11-05 OMD OFFICINA MECCANICA DOMASO S.p.A. All-purpose cutting device for coil spring winding machine
US6000265A (en) * 1997-06-10 1999-12-14 Kabushiki Kaisha Itaya Seisaku Sho Spring manufacturing apparatus
US6142002A (en) * 1998-08-21 2000-11-07 Kabushiki Kaisha Itaya Seisaku Sho Spring manufacturing apparatus and tool selection apparatus
US6151942A (en) * 1998-08-21 2000-11-28 Kabushiki Kaisha Itaya Seisaku Sho Spring manufacturing apparatus
EP1293274A2 (en) * 2001-09-17 2003-03-19 HILTI Aktiengesellschaft Device for cutting wire into lengths
JP2006026730A (en) * 2004-07-22 2006-02-02 Shinko Kikai Kogyo Kk Wire cutting device of spring manufacturing machine
CN102688959A (en) * 2012-06-19 2012-09-26 曲海涛 Simple steel bar straightening and shearing machine
CN103341573A (en) * 2013-07-05 2013-10-09 太仓苏晟电气技术科技有限公司 Automatic section bar cutting-off device
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CN108421936A (en) * 2018-05-22 2018-08-21 厦门宏发工业机器人有限公司 A kind of silk material chamfering shaping mechanism
CN108480528A (en) * 2018-05-30 2018-09-04 福建省昌辉机电有限公司 A kind of generator lead-out wire punching break wire device
CN109482787A (en) * 2018-12-28 2019-03-19 江苏信息职业技术学院 The long automatic cutting device of line
CN109676064A (en) * 2018-12-19 2019-04-26 郑美华 It is a kind of municipal administration well lid pour with fine steel rib shear
CN109794567A (en) * 2018-12-20 2019-05-24 天长市龙亨电子有限公司 A kind of controller for electric vehicle productive power line processing intercept unit
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0804979A1 (en) * 1996-05-02 1997-11-05 OMD OFFICINA MECCANICA DOMASO S.p.A. All-purpose cutting device for coil spring winding machine
US6000265A (en) * 1997-06-10 1999-12-14 Kabushiki Kaisha Itaya Seisaku Sho Spring manufacturing apparatus
US6142002A (en) * 1998-08-21 2000-11-07 Kabushiki Kaisha Itaya Seisaku Sho Spring manufacturing apparatus and tool selection apparatus
US6151942A (en) * 1998-08-21 2000-11-28 Kabushiki Kaisha Itaya Seisaku Sho Spring manufacturing apparatus
EP1293274A2 (en) * 2001-09-17 2003-03-19 HILTI Aktiengesellschaft Device for cutting wire into lengths
EP1293274A3 (en) * 2001-09-17 2003-11-12 HILTI Aktiengesellschaft Device for cutting wire into lengths
JP2006026730A (en) * 2004-07-22 2006-02-02 Shinko Kikai Kogyo Kk Wire cutting device of spring manufacturing machine
JP4685981B2 (en) * 2004-07-22 2011-05-18 新興機械工業株式会社 Spring cutting machine wire rod cutting device
CN102688959A (en) * 2012-06-19 2012-09-26 曲海涛 Simple steel bar straightening and shearing machine
CN103341573A (en) * 2013-07-05 2013-10-09 太仓苏晟电气技术科技有限公司 Automatic section bar cutting-off device
CN107626858A (en) * 2017-10-25 2018-01-26 郑州丽福爱生物技术有限公司 Construction multi-functional bar cutter device
CN108421936A (en) * 2018-05-22 2018-08-21 厦门宏发工业机器人有限公司 A kind of silk material chamfering shaping mechanism
CN108480528A (en) * 2018-05-30 2018-09-04 福建省昌辉机电有限公司 A kind of generator lead-out wire punching break wire device
CN109676064A (en) * 2018-12-19 2019-04-26 郑美华 It is a kind of municipal administration well lid pour with fine steel rib shear
CN109794567A (en) * 2018-12-20 2019-05-24 天长市龙亨电子有限公司 A kind of controller for electric vehicle productive power line processing intercept unit
CN109794567B (en) * 2018-12-20 2020-04-17 天长市龙亨电子有限公司 Electric wire processing cuts equipment for electric vehicle controller production
CN109482787A (en) * 2018-12-28 2019-03-19 江苏信息职业技术学院 The long automatic cutting device of line
CN109482787B (en) * 2018-12-28 2024-04-02 江苏信息职业技术学院 Automatic cutting machine for long wire
KR20210000334U (en) * 2019-07-30 2021-02-10 후이저우 오드메이 머시너리 컴퍼니 리미티드 Displaceable tool module

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