JPS6247615B2

JPS6247615B2 -

Info

Publication number: JPS6247615B2
Application number: JP3094183A
Authority: JP
Inventors: Toraji Mochizuki
Original assignee: Individual
Current assignee: Individual
Priority date: 1983-02-28
Filing date: 1983-02-28
Publication date: 1987-10-08
Also published as: JPS59159240A

Description

【発明の詳細な説明】２脚型タイロツドのように、Ｖ形をなし、かつ
その基部たる反転折曲部に、大きな体積を有する
軸受等の塊状部を備える２又杆を製造するには、
通常、２本の杆体と塊状体とを準備し、これらを
溶接するか、あるいはやや大径の棒状体を素材と
し、これを鍛造している。DETAILED DESCRIPTION OF THE INVENTION In order to manufacture a two-pronged tie rod, which is V-shaped and has a lumpy part such as a bearing having a large volume at its base, which is an inverted bent part,
Usually, two rods and a block are prepared and welded together, or a rod with a slightly larger diameter is used as a raw material and then forged.

しかし、これらの方法を実施するためには、相
当の熟練と工数とを必要とし、特に前者は、強度
的に問題があり、また後者は、多大の設備費及び
燃料費を必要とし、高価につくという欠点があ
る。 However, implementing these methods requires considerable skill and man-hours, and the former in particular has problems with strength, and the latter requires a large amount of equipment and fuel costs, making it expensive. There is a drawback that it sticks.

本発明は、これらの欠点を除去するため、１本
の金属棒状体（パイプを含む）を素材とし、電気
加熱による据込み加工により、塊状部を備えるＶ
状の２又杆を、能率よく製造する方法及び装置を
提供することを目的としている。 In order to eliminate these drawbacks, the present invention uses a single metal rod-like body (including a pipe) as a raw material, and uses electric heating to perform an upsetting process to form a V-shaped body with a lumpy part.
It is an object of the present invention to provide a method and apparatus for efficiently manufacturing a two-pronged rod.

以下、図面に基いて説明する。 The following will explain based on the drawings.

第１図は、本発明装置の一実施例を示す。 FIG. 1 shows an embodiment of the device of the present invention.

基台１の要所には、互いに対向する摺動電極
２，２が、相手側との距離を変化しうるようにし
て設けられている。 Sliding electrodes 2, 2 facing each other are provided at important points on the base 1 so that the distance from the other side can be changed.

すなわち、各摺動電極２は、互いに対向する水
平の流体シリンダ３から突出するピストン杆４の
前端に、絶縁板５を介して固着された導電ホルダ
ー６をもつて取付けられている。 That is, each sliding electrode 2 is attached to the front end of a piston rod 4 protruding from horizontal fluid cylinders 3 facing each other, with a conductive holder 6 fixed via an insulating plate 5.

各摺動電極２の先端の対向面には、Ｖ状に折曲
された金属棒状体ａの断面形状、寸法、並びに傾
斜角度に応じた傾斜凹溝２ａが形成されている。 An inclined groove 2a corresponding to the cross-sectional shape, dimensions, and inclination angle of the metal rod-shaped body a bent in a V-shape is formed on the opposing surface of the tip of each sliding electrode 2.

対向する摺動電極２，２の間において、基台１
には、各傾斜凹溝２ａと対向するとともに、それ
と平行をなし、かつそれと同様の断面を有する傾
斜凹溝７ａ，７ａを両側に備える受体７が固着さ
れている。 Between the opposing sliding electrodes 2, 2, the base 1
A receiver 7 is fixed to the receiver 7, which is provided on both sides with inclined grooves 7a, 7a facing each inclined groove 2a, parallel thereto, and having a similar cross section.

摺動電極２，２の中間部側方には、前方に形成
しようとする塊状基部と対応する凹窪８ａを備え
る型電極８が配設されている。なお図では、凹窪
８ａは、半球状である。 A mold electrode 8 having a recess 8a corresponding to a block-shaped base to be formed in the front is disposed on the side of the intermediate portion of the sliding electrodes 2,2. In addition, in the figure, the recess 8a has a hemispherical shape.

型電型８は、前記両流体シリンダ３，３と直交
する水平の流体シリンダ９から突出するピストン
杆１０の前端に、絶縁板１１を介して固着された
導電ホルダー１２をもつて取付けられている。 The electric mold 8 is attached to the front end of a piston rod 10 protruding from a horizontal fluid cylinder 9 perpendicular to both the fluid cylinders 3, 3, with a conductive holder 12 fixed through an insulating plate 11. .

前記導電ホルダー１２と、一方の導電ホルダー
６には、トランス１３の２次電圧給電線１４が接
続されている。 A secondary voltage feed line 14 of a transformer 13 is connected to the conductive holder 12 and one of the conductive holders 6.

摺動電極２，２を挾む型電極８の反対側には、
２又杆２０の適所を案内保持する保持体１５，１
５が取付けられている。 On the opposite side of the molded electrode 8 sandwiching the sliding electrodes 2, 2,
Holding body 15,1 that guides and holds the bifurcated rod 20 in the proper position
5 is installed.

このような装置によつて所望の加工を行なうた
めには、まず、第２図及び第３図に示すように、
１本の金属棒状体ａ（パイプでもよい）を、所要
の角度をもつてＶ状に折り曲げるとともに、その
折曲部ｂを、折り曲げ方向と直角方向に、適宜圧
潰するか、あるいは切削もしくは研削して、第３
図に示すように、その外側面をやや扁平ｃとす
る。 In order to perform the desired processing using such a device, first, as shown in FIGS. 2 and 3,
A single metal rod-shaped body a (a pipe may be used) is bent into a V shape at a required angle, and the bent part b is crushed, cut or ground as appropriate in a direction perpendicular to the bending direction. Well, the third
As shown in the figure, its outer surface is slightly flattened c.

このようにして形成されたＶ形素体の折り曲げ
部ｂの外側面ｃを、第１図で示すように、型電極
８の凹窪８ａ内へ嵌入し、かつ折曲部ｂから近い
個所において、棒状体ａを、摺動電極２，２の傾
斜凹溝２ａ，２ａと、受体７の傾斜凹溝７ａ，７
ａとをもつて挾み、かつ棒状体ａの先端部を、保
持体１５，１５をもつて案内保持する。 As shown in FIG. 1, the outer surface c of the bent portion b of the V-shaped element body thus formed is inserted into the recess 8a of the mold electrode 8, and at a point close to the bent portion b. , the rod-shaped body a is inserted into the inclined grooves 2a, 2a of the sliding electrodes 2, 2 and the inclined grooves 7a, 7 of the receiver 7.
The tip of the rod-shaped body a is guided and held by the holders 15, 15.

ついで、両導電ホルダー６，１２に通電すると
ともに、各流体シリンダ３，３，９に流体を送つ
て、ピストン杆４，４，１０に、所要の力の前進
力を付与し、かつ金属棒状体ａの先端を、適宜の
押圧体３０，３０をもつて、軸線方向に押圧す
る。 Next, both conductive holders 6, 12 are energized, fluid is sent to each fluid cylinder 3, 3, 9, a required forward force is applied to the piston rods 4, 4, 10, and the metal rod-shaped body is The tip of a is pressed in the axial direction using appropriate pressing bodies 30, 30.

すると、棒状体ａを通つて、摺動電極２と型電
極８の間を流れる電流により、型電極８の凹窪８
ａと当接している棒状体ａの扁平部ｃは、ジユー
ル熱により加熱軟化され、押圧体３０による押圧
に伴い、凹窪８ａ内へ徐々に据え込まれて、棒状
体ａの折り曲げ部ｂには、凹窪８ａと対応する球
状の塊状部b′が形成される。 Then, the current flowing between the sliding electrode 2 and the mold electrode 8 through the rod-shaped body a causes the recess 8 of the mold electrode 8 to
The flat part c of the rod-shaped body a that is in contact with the rod-shaped body a is heated and softened by the Joule heat, and is gradually pushed into the recess 8a by the pressing by the pressing body 30, and is bent into the bent part b of the rod-shaped body a. A spherical lump b' corresponding to the recess 8a is formed.

このように加工されたものの塊状部を、さらに
型打成形し、かつ所要の孔をあけると、第４図及
び第５図に示すように塊状基部２１を備えるＶ状
の２又杆２０が得られる。 The thus-processed block is further stamped and the required holes are drilled to obtain a V-shaped bifurcated rod 20 having a block base 21, as shown in FIGS. 4 and 5. It will be done.

本発明の方法においては、棒状体の折曲部の外
側面をややテーパー状の扁平として断面積を小と
しておくから、この折曲部の外側面へ型電極から
通電し、かつ棒状体を型電極へ押圧した際、前記
折曲部における単位面積当りの通電量及び圧縮応
力は、他部よりも大となり、発熱と軟化は、この
折曲部を起点として、速かに開始され、しかも塑
性変形時の分力が、棒状体の表裏面に均一に伝え
られ、表裏が同様に膨出する塊状基部を容易に形
成することができる。 In the method of the present invention, the outer surface of the bent portion of the rod-shaped body is made slightly tapered and flat so that the cross-sectional area is small. When the electrode is pressed, the amount of current and compressive stress per unit area in the bent part are larger than in other parts, and heat generation and softening start from this bent part quickly, and the plasticity The component force at the time of deformation is uniformly transmitted to the front and back surfaces of the rod-shaped body, and it is possible to easily form a block-like base in which both the front and back bulge in the same way.

なお、型電極８を、流体シリンダ９の軸線に対
して、側方もしくは上方へ移動させつつ、前述の
加工を行えば、Ｌ状に屈曲する塊状基部を形成す
ることができる。 Note that by performing the above-described processing while moving the mold electrode 8 laterally or upwardly with respect to the axis of the fluid cylinder 9, it is possible to form a massive base bent in an L shape.

なお、棒状体を停止させたまま、型電極を移動
させて加工することもできる。 Note that processing can also be carried out by moving the mold electrode while the rod-shaped body is stopped.

[Brief explanation of the drawing]

第１図は、本発明装置の実施例を示す一部横断
平面図、第２図は、本発明方法の実施に際し、金
属棒状体をＶ状に折曲するとともに、その折曲部
の外側部を扁平とした状態の正面図、第３図は、
第２図の側面図、第４図は、完成された２又杆の
正面図、第５図は、同じく側面図である。１……基台、２……摺動電極、２ａ……傾斜凹
溝、３……流体シリンダ、４……ピストン杆、５
……絶縁板、６……導電ホルダー、７……受体、
７ａ……傾斜凹溝、８……型電極、８ａ……凹
窪、９……流体シリンダ、１０……ピストン杆、
１１……絶縁板、１２……導電ホルダー、１３…
…トランス、１４……給電線、１５……保持体、
２０……２又杆、２１……塊状基部、３０……押
圧体、ａ……金属棒状体、ｂ……折曲部、ｃ……
扁平部。 FIG. 1 is a partially cross-sectional plan view showing an embodiment of the apparatus of the present invention, and FIG. 2 is a partial cross-sectional plan view showing an embodiment of the apparatus of the present invention. Figure 3 is a front view of the flat state.
FIG. 2 is a side view, FIG. 4 is a front view of the completed bifurcated rod, and FIG. 5 is a side view. DESCRIPTION OF SYMBOLS 1... Base, 2... Sliding electrode, 2a... Inclined groove, 3... Fluid cylinder, 4... Piston rod, 5
...Insulating plate, 6...Conductive holder, 7...Receptor,
7a... Inclined concave groove, 8... Type electrode, 8a... Concave, 9... Fluid cylinder, 10... Piston rod,
11... Insulating plate, 12... Conductive holder, 13...
...transformer, 14...power supply line, 15...holding body,
20... Bifurcated rod, 21... Massive base, 30... Pressing body, a... Metal rod-shaped body, b... Bent part, c...
Pars plana.

Claims

[Claims] 1. A metal rod-shaped body (including a pipe) is bent into a V-shape, and the outer surface of the bent portion is made flat with a slightly tapered shape, and the outer end of the flat portion is connected to a mold electrode. At the same time, a sliding electrode is brought into contact with the rod-shaped body in the vicinity of the bent part, and electricity is passed between the two electrodes, so that by Joule heat,
By pressing the rod-shaped body and the mold electrode against each other while heating and softening the outer end of the flat part, the flat part is gradually upset into the recess of the mold electrode to form a lump part. A method for manufacturing a bifurcated rod having a characteristic lumpy base. 2. The method according to claim 1, wherein the outer surface of the bent portion is made flat by pressing the bent portion in a direction perpendicular to the bending direction. 3. The method according to claim 1 or 2, characterized in that the outer side of the bent portion is cut to make it flat. 4. A pair of sliding electrodes that face each other, can approach and separate from each other, and have slanted grooves on opposing surfaces into which two metal rods bent in a V-shape can fit; A shaped electrode is disposed on the side between the two sliding electrodes, has a recess into which the outer surface of the bent portion of the two-pronged metal bar can fit, and can move forward toward the gap between the two sliding electrodes. An apparatus for manufacturing a bifurcated rod, comprising: a block base comprising: means for supplying current to at least one of the sliding electrodes and the mold electrode; and means for pressing the metal rod toward the mold electrode. 5. The device according to claim 4, wherein the means for moving the sliding electrode and the mold electrode is a fluid cylinder.