JPH0634882U - Cold pressure welding device - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to prevent the wire rod from being bent due to the displacement of the die hole axis and the center of the finger due to the pressing of the die in the work of the cold pressure welding apparatus. [Structure] On both sides of the fixed V block 1 and the moving V block 2, finger stands connected to them by a link mechanism 8
Equipped with 11. The finger base 11 is configured to be able to follow the pivot portion 9 of each link mechanism by sliding on the track 10 parallel to the moving direction of the V block. Then, the finger 13 is fixed to the finger stand 11 so that the central portion of the finger 13 is located on the axis of the die hole. Even if the die hole shaft is retracted by the pressing of the die, the finger 13 can follow the displacement, so that the positional displacement between the two does not occur and the wire W does not bend.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cold pressure welding device.

[0002]

[Prior art]

 As a conventional cold pressure welding apparatus, for example, there is one shown in Japanese Patent Publication No. 2-37274-5. This can be divided into four as shown in Fig. 4, and by using these dies 3a, 3b, 3c, 3d that form the die hole 4, these dies are used as fixed V blocks facing each other. It is installed between the moving V block and the mobile V block. This die has a total of four springs 6 between adjacent dies, and the repulsive force of the dies allows each die to be opened in the moving direction of the V block and the axial direction of the die hole. In addition, each die is provided with a void 7 for escaping burrs generated during pressure contact. Further, fingers (not shown) are fixed on both sides of the V block, and the wire rod is held by the fingers to perform the pressure welding work.

The pressure welding procedure will be described with reference to FIG. The figure is viewed from above the die and shows a cross section cut at the die hole. First, the wire rod W is inserted into the die hole 4 while being abutted against each other in a state where the respective dies 3 are spaced in the moving direction of the V block and the axial direction of the die hole 4, and the wire rod W is held by the fingers 23. Next, the moving V block 22 is pressed toward the fixed V block 21 and the wire W is sandwiched by the die holes 4 (FIG. 5 (A)). When the moving V block 22 is further pressed, each die slides along the inclined surface of the V block with which it abuts, and the abutting surface of the wire is compressed and joined (FIG. 5 (B)). At this time, the compressed wire material becomes a burr 24 and is extruded. Then, the moving V block 22 is retracted, the die is opened, and the pressure welding work is completed (FIG. 5 (C)).

[0004]

[Problems to be Solved by the Invention]

 However, in the above device, since the fingers that hold the wire rod are fixed, even if the wire rod moves with the movement of the die, the fingers cannot follow it. That is, the die contacting the fixed V block by the pressing of the moving V block retreats along the inclined surface, and the wire clamped by this also moves. However, since the fingers that hold the wire are fixed, there is a gap between the center of the finger (the part that supports the wire) and the die hole axis when pressed.

In the case of a thin wire, since the wire rod is flexible, the positional deviation between the die hole axis and the finger center does not pose a problem so much. For example, if the wire rod has a diameter of about 2 mm, this position There was a problem in that the wire rod was bent due to the misalignment and a gap was created between the abutting surfaces, resulting in poor pressure welding.

The present invention has been made to solve such a problem, and an object thereof is to prevent fingers from being pressed along with the movement of a wire rod clamped by a die in order to prevent defective press contact and bending of the wire rod. It is to provide a cold pressure welding device that can be driven.

[0007]

[Means for Solving the Problems]

 In order to achieve this object, the press-contacting device of the present invention can be divided into four parts between a fixed V block and a moving V block, which are opposed to each other, and a die for collecting these to form a die hole is incorporated. The wire rod is inserted into this die hole by butting it, and while holding the wire rod by the fingers provided on both sides of these V blocks, the wire rod is clamped by the die hole by pressing the moving V block, and the butting is performed. A cold pressure welding device for compressing and joining surfaces, wherein a fixed V block, a moving V block, and finger stands connected by a link mechanism are provided on both sides of the V block. By sliding on an orbit parallel to the moving direction of the, it is possible to follow the pivot parts of each of the link mechanisms, and to fix the center part of the finger so that it is located on the die hole shaft. It is characterized by comprising.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. (Equipment) First, the structure around the die of the device of the present invention will be described with reference to FIG. This figure is a top view of the die part. As shown in the figure, a fixed V block 1 and a moving V block 2 each having V-shaped inclined surfaces 1a and 2a are arranged to face each other. The fixed V-block 1 does not move at all, but the moving V-block 2 is constructed so that it can be pushed toward the fixed V-block side by a cylinder as described later.

Between these two V blocks 1 and 2, dies 3 that can be divided into four parts are respectively installed by abutting on the inclined surfaces 1a and 2a of the V block. This is the same as the conventional one shown in FIG. 4, and four dies 3a, 3b, 3c, 3d are assembled to form the die hole 4. A pin 5 and a spring 6 are provided between adjacent dies, and the dies are normally configured to be opened by the repulsive force thereof in the moving direction of the V block and the axial direction of the die hole. Further, each die is provided with a void 7 for escaping burrs generated during pressure welding.

Both V blocks 1 and 2 having such a die 3 incorporated therein are connected by a link mechanism 8. This link mechanism is a V type in which one ends of two plate-shaped bodies 8a and 8b having the same length are connected by a pivot 9, and the other ends are pivotally supported by a moving V block 2 and a fixed V block 1, respectively. ing. Such link mechanisms 8 are provided symmetrically on both sides of the V block (both sides in the axial direction of the die hole). In this example, a V-shaped link mechanism in which plate-shaped bodies having the same length are connected is used, but the point is that the finger stand 11 described later can be synchronized with the movement of the dies 3b and 3d that abut the fixed V block. If possible, the configuration is not limited to this example.

Furthermore, on both sides of the V block, finger stands 11 that can slide on a track 10 parallel to the moving direction of the V block are provided and are connected to the pivot 9 of the link mechanism. Therefore, the finger stand 11 follows the movement of the moving V-block 2 until the die grips the wire rod, that is, when the die closes only in the V-block moving direction (see FIG. 1 (B)). Follows the movement of the dies 3b and 3d that abut the fixed V block 1. Since the pivot portion also moves in the axial direction of the die hole, a long through hole 12 is provided in the same direction so that the pivot portion 9 can reciprocate within the through hole.

Fingers 13 for sandwiching the wire are fixed to the finger base 11. This holds the wire so that it does not move in the direction opposite to the pressing direction during the pressing work, and consists of two claws that sandwich the wire from both sides. The center part of the finger (the center part of both claws) is arranged on the die hole axis. That is, when the die is closed only in the V block moving direction, if the center of the finger 13 is located on the axis of the die hole, the dies 3b and 3d that abut on the fixed V block by the subsequent pressing are arranged. Even if it moves backward, the fingers can move in synchronization with the die hole axis.

Next, the operating mechanism of the device will be described with reference to FIG. This figure is a schematic vertical cross-sectional view of the device of the present invention, and the finger stand and link mechanism are omitted. The die 3 sandwiching the wire W is arranged between the fixed V block 1 and the moving V block 2 which are integrated with the main body 14, and the moving V block 2 is moved to the rear of the moving V block 2 via a cam follower 15 at the tip. A cylinder 16 for pressing is provided.

The cam follower 15 moves the die accurately and quickly to a wire insertion position (shown by a broken line) where the wire W can be held in the die hole without dropping. It is configured to be able to move up and down to the position of the stopper 18 by the cylinder 17, and is in the wire extraction position (illustrated by the solid line) before and after the pressure contact, but it is pushed up to the wire insertion position during the pressure contact work. At the line insertion position, the cylinder 16, the cam follower 15, the moving V block 2, the die 3, and the fixed V block 1 are lined up on a straight line. Therefore, the moving V block 2 is pressed by the cylinder 16 to perform the pressure contact. ..

Further, the moving V block 2 is provided with a spring 19 having one end fixed to the main body and the other end fixed to a lower portion of the moving V block. This is for pushing back the moving V-block 2 to the side opposite to the pushing direction by the repulsive force of the spring 19 when the pushing load of the cylinder 16 is reduced.

(Operation) A pressure welding procedure using such an apparatus will be described. First, the cam follower 15 is pushed up by the cylinder 17, and the die 3 is slid to the wire insertion position. The wire W is inserted into the die hole 4 by butting it, and the wire W is held by the fingers 13. At this time, the die is in the state shown in FIG. Next, the moving V block 2 is pressed by the cylinder 16 to hold the wire W 2 in the die hole 4. At this time, the die 3 is closed only in the moving direction of the V block (see FIG. 1B). Further, when the moving V block 2 is pressed, the die 3 slides along the inclined surfaces 1a and 2a of the V block and closes in the axial direction of the hole to compress the abutting surface of the wire W (see FIG. 2). At this time, since the dies 3b and 3d contacting the fixed V block are retracted, the wire W sandwiched therebetween is also retracted, but the link mechanism 8 also slides the finger base 11 in synchronization, so that the central portion of the finger 13 is moved. With this, pressure welding is performed without any deviation of the die hole axis. When this kind of work is repeated several times, a part of the abutted wire rods is pushed aside as a burr and the wire rods are joined. Then, the load on the cylinder 16 is released to retract the die to the wire insertion position, and then the load on the cylinder 17 is also released to lower the cam follower 15. As a result, the die 3 retracts to the wire take-out position, so that the wire W that has been pressure-welded is removed and the work is completed.

[0017]

[Effect of device]

 As described above, according to the press-contacting device of the present invention, the finger stand that is driven by the moving V-block by the link mechanism is used, and the finger stand is fixed so that the center of the finger is located on the axis of the die hole. Thus, the center of the finger can always be positioned on the axis of the die hole regardless of the movement of the die. Therefore, even when a wire rod having a relatively large diameter is pressed, it is possible to reliably press the wire without bending.

[Brief description of drawings]

FIG. 1 is a top view of a die of the device of the present invention showing a state before pressure welding, in which (A) shows a state in which each die is opened, and (B) shows a state in which the die is closed only in the moving direction of the V block to clamp the wire rod. Indicates the status.

FIG. 2 is a top view of a die of the device of the present invention showing a state after pressure welding.

FIG. 3 is a schematic sectional view showing the overall configuration of the device of the present invention.

FIG. 4 is a perspective view showing the structure of a die.

FIG. 5 is a schematic cross-sectional view showing the vicinity of a die at the time of press contact in a conventional device, (A) shows a case where a wire rod is sandwiched by dies,
(B) shows a state where the pressure welding is performed, and (C) shows a state where the die is opened and the pressure welding is completed.

[Explanation of symbols]

 1 Fixed V block 2 Moving V block 1a, 2a Inclined surface 3, 3a, 3b, 3c, 3d Die 4 Dice hole 5 pin 6 Spring 7 Gap 8 Link mechanism 8a, 8b Plate-like body 9 Pivot part 10 Orbit 11 Finger stand 12 Through hole 13 Finger 14 Body 15 Cam follower 16 Cylinder 17 Cylinder 18 Stopper 19 Spring 21 Fixed V block 22 Moving V block 23 Finger 24 Burr

Claims (1)

[Scope of utility model registration request] 1. A dice which can be divided into four and is assembled to form a die hole between the fixed V block and the moving V block which are opposed to each other, and a wire rod is inserted into the die hole by butting. Then, while holding the wire with fingers provided on both sides of these V blocks,
A cold pressure welding device that presses a block to hold a wire rod in a die hole and compresses and joins the abutting surfaces of the wire rod.
A block and a finger stand connected by a link mechanism are provided, and this finger stand can be driven by a pivot part of each link mechanism by sliding on a track parallel to the moving direction of the V block, A cold pressure welding device, characterized in that the central part of the is fixed so as to be located on the axis of the die hole.