JP3440429B2 - Cold welding tool - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold welding tool and a method for removing burrs from a cold welding wire.

[0002]

[Prior Art] Japanese Patent Publication No. 5-1207 as a conventional cold pressure welding tool.
There is one shown in No. 5 publication. This is a portable pressure welding tool in which two wire rods are held in contact with each other with a die and the end faces of both wire rods are pressed into contact with each other.

When the wire rod is pressure-welded with the above tool, a burr X is formed at the joint (see FIG. 7A). When the wire W is a coated copper wire, the exposed portion of the copper wire after pressure welding is covered with a heat-shrinkable tube Z and heated by a dryer D or the like (see FIG. 7B). At this time, if the burr remains, it breaks the tube Z and impairs the insulating property. Therefore, it is necessary to remove the burr X before coating. This removal was performed by using a pliers-shaped special tool T (see FIG. 7A) and cutting or screwing the burr.

[0004]

However, when deburring with a plier-shaped special tool, there are the following problems. When performing pressure welding work, it is necessary to carry both a pressure welding tool and a tool for deburring. In addition, the workability is poor because it is necessary to change the tool for pressure welding and deburring. When the burr is threaded, a bending stress is applied to the wire, which may cause deformation and impair linearity. Therefore, the main object of the present invention is to provide a cold pressure welding tool capable of easily removing burrs by the same operation as the pressure welding operation.

[0005]

SUMMARY OF THE INVENTION The present invention is characterized in that a cold pressure welding tool is provided with a deburring mechanism. The pressure welding tool includes a main body and a lever pivotally attached to the main body, and a fixed V block and a moving V block are held by the main body. In addition, a die for assembling four die pieces to form a die hole is incorporated between both V blocks. In addition, hold the wire that is inserted by butting against the die hole.
It also has two pairs of fingers to release. The wire V held in the die hole is compressed and joined by pressing the moving V block by the rotation of the lever. An insertion plate is provided for a pair of fingers as a deburring mechanism. The insertion plate is configured to be sandwiched between the die pieces when the fingers are opened (when the wire is released), and to be removed from between the die pieces when the fingers are closed (when the wire is clamped).

When the insertion plate is interposed between the die pieces, two of the four die pieces hold the wire rod.
The remaining two die pieces cannot hold the wire rod. That is,
Two die pieces close to the finger without the insertion plate hold the wire rod, and two die pieces close to the finger provided with the insertion plate cannot hold the wire rod. When the moving V block is pressed here, the die holding the wire rod is moved to the die side not holding the wire rod. As a result, the burr is pressed and removed by the die that does not hold the wire.

Further, the method for removing burrs according to the present invention is characterized in that the wire rod is held only by two of the four die pieces, and the remaining two die pieces are pressed to remove the burr. To do. That is, it has the following configuration. A die hole is formed by four die pieces incorporated between the fixed V block and the moving V block, and a wire rod is inserted into the die hole by abutting. By pressing the moving V block, the wire material sandwiched between the die pieces is pressed and joined. After joining the wire rods, the insertion plate is sandwiched between the die pieces to sandwich the wire rod between the two die pieces, and the remaining two die pieces do not sandwich the wire rod. In this state, the moving V block is pressed, and burrs are pressed against the remaining two die pieces to remove burrs from the wire rod.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below. [Composition] The appearance of the tool of the present invention is shown in FIGS. 1 is a front view and FIG. 2 is a plan view. The tool of the invention comprises a body 1 and a lever 2 pivotally mounted thereto. The body 1 has a grip 3
Then, the lever 2 is rotated toward the grip portion to perform the pressure welding work of the wire. When the lever 2 is turned to the grip portion side, the moving V block 9 (FIG. 2) is pressed to the fixed V block 10 side, and the die 6 arranged between the blocks 9 and 10 is compressed. In this example, an L-shaped lever 2 and a booster lever 8 are used as a mechanism for transmitting the rotation operation of the lever 2 to the pressing operation of the moving V block 9. One end of booster lever 8 moves V block 9
And the other end abuts on the tip of the lever 2 and is axially supported by the main body 1 at the intermediate portion. When the lever 2 is rotated, the tip of the lever 2 pushes the other end of the booster lever 8 to swing the booster lever 8, and one end of the lever 2 pushes the moving V block 9. The mechanism for compressing the die through the moving / fixing V block by the operation of the lever is described in, for example, Japanese Patent Publication No. 5-12075, Japanese Patent Application No. 6-220964, and Japanese Patent Application No. 4-76923. A spring 4 is provided between the grip 3 and the lever 2.
(Fig. 1) is mounted and both are always open.

A finger 5 for holding the wire rod and a die 6 for pressing the wire rod are provided on the upper portion of the main body 1 (FIG. 2). The finger 5 is formed by arranging a pair of plate-like bodies in a double-door form. In this example, two pairs of fingers 5 are provided on both sides of the die 6. The plate-shaped body forming the finger 5 has a shaft support end 5A and a wire rod holding end 5B. The distance between both wire rod holding ends 5B is adjusted by rotating both plate-like members around the shaft support end 5A.

The insertion plate 7 is provided on one plate-shaped body of the pair of fingers 5. The insertion plate 7 is used to remove burrs after joining the wires. That is, by opening the fingers 5, the insertion plate 7 is sandwiched between the dies 6 and the fingers 5
It is configured so that it can be removed from between the dice 6 by closing the. A specific burr removal method will be described later. In this example, the insertion plate 7 is composed of a curved spring plate.

On the other hand, the die 6 is incorporated between a moving V block 9 and a fixed V block 10 which are arranged facing each other on the upper part of the main body (FIG. 2). The structure of the die is shown in FIG. The die 6 is composed of four die pieces 6A, 6B, 6C, 6D. Each die piece is block-shaped and has a sandwiching surface 6E, a sliding contact surface 6F and a pressure contact surface 6G. Each holding surface 6E has a groove 6H into which a wire is inserted, and when the holding surfaces 6E facing each other are combined, the grooves 6H are also combined to form a die hole having a circular cross section. The die hole is located above each die piece, and the insert plate is sandwiched below the die hole. The sliding contact surface 6F contacts the inclined surface of the fixed or moving V block. Here, the sliding contact surface 6F of the die pieces 6A, 6B is fixed V
The sliding contact surface 6F of the remaining die pieces 6C and 6D comes into contact with the moving V block on the block. The press contact surface 6G is provided with a notch 6I for escaping burrs generated when joining the wire rods. Also, a total of four springs 8 are interposed between the adjacent die pieces,
Each die piece 6A, 6B, 6C, 6D is always held with a gap. At the time of joining the wire rods, one of the four die pieces is sandwiched between the die pieces 6B and 6C, the other wire rod is sandwiched between the die pieces 6A and 6D, and the two wire rods are butted. In this state, the pressure contact surfaces are pressed against each other to compress the end surface of the wire.

Before explaining a method for removing burrs, a pressure welding method using the die 6 will be described. FIG. 4 is a view of the die as seen from above, and shows a cross section taken along the die hole. In each of the drawings, a moving V block 9 and a fixed V block 10 are located on the left and right of the die, and fingers 5 for holding the wire are located above and below the die. The wire W is inserted into the die hole by abutting the die pieces 6A, 6B, 6C, 6D in a state in which the distance between the die pieces 6A, 6B, 6C and 6D is maintained, and the wire 5 is held by the fingers 5 (FIG. 4A). The movable V block 9 is pressed toward the fixed V block 10 side, and the wire W is sandwiched by the die holes. At this time, the die piece is open in the axial direction of the wire (FIG. 4B). When the moving V-block 9 is further pressed, each die piece is slid along the inclined surface 11 of the V-blocks 9 and 10 in contact with each other. Then, the die piece is closed in the axial direction of the wire rod, and the end surface of the wire rod W is compressed and joined (FIG. 4C).
At this time, the compressed wire material becomes a burr X and is extruded. The moving V block 9 is retracted, each die piece is opened, and the pressure welding work is completed (FIG. 4D).

[Deburring Method] Next, the procedure for deburring will be described with reference to FIGS. FIG. 5 is an explanatory view showing the movement of the die piece, and FIG. 6 is an enlarged view around the die hole in FIGS. 5A, 5C and 5D. At the end of joining the wire rods, the die pieces 6A, 6B, 6C, 6D are held in a spaced state (Fig. 5A). At this time, the wire is not held in the die hole. The wire joint Y is 4
It is located in a place surrounded by two die pieces, and a burr X is formed almost all around (FIG. 6A).

Of the four die pieces, the insert plate 7 is sandwiched between the sandwiching surfaces of the two die pieces 6B and 6C (see FIG. 5).
B). In this state, the moving V block 9 is pressed toward the fixed V block 10 (FIG. 5C). At this time, the die pieces 6A and 6D which do not sandwich the insertion plate 7 are closed in the direction orthogonal to the wire rod to hold the wire rod. On the other hand, the die pieces 6B and 6C that sandwich the insertion plate 7 cannot be completely closed and do not hold the wire W (see FIG. 6).
B).

Further, the moving V block 9 is pressed to close each die piece in the axial direction of the wire (FIG. 5D). At this time,
Die pieces 6A and 6D that do not hold the insert plate 7 are fixed / movable V
The slanted surface 11 of the block is slid, and is moved to the side of the die pieces 6B, 6C holding the insertion plate 7 together with the held wire. On the other hand, the die pieces 6B and 6C sandwiching the insertion plate 7 do not hold the wire rod and move to the die pieces 6A and 6D side. As a result, the die pieces 6A, 6D and the die pieces 6B, 6C are brought close to each other, and the wire W is moved in the axial direction (on the side of the die pieces 6B, 6C sandwiching the insertion plate 7). Therefore, the burr X is a dice piece 6 that sandwiches the insert plate 7.
It is pressed against B and 6C and removed so as to break (Fig. 6
C). When the burr X is removed, the moving V block 9 is retracted to open each die piece. Since the insertion plate 7 is composed of a spring, it can follow the movement of the die piece.

Although the above description relates to a portable pressure welding tool, the present invention is a desktop pressure welding tool (for example, Japanese Patent Application No.
220964) can also be applied. Further, the insertion plate 7 does not have to be fixed to the fingers 5, and an appropriate plate-shaped body may be interposed between the die pieces during the deburring operation.

[0017]

As described above, the pressure welding tool of the present invention has the following effects. Since it also has a deburring function, it is possible to press the wire rod and remove the burr with one tool. Deburring work can be performed by a simple operation by turning the lever. This operation is similar to the pressure contact operation of the wire rod and is excellent in workability. Since the burr is removed by bending it in the longitudinal direction of the wire rod, the bending stress is not so much applied to the wire rod, and its straightness is secured.

[Brief description of drawings]

FIG. 1 is a front view of a pressure welding tool of the present invention.

FIG. 2 is a plan view of the pressure welding tool of the present invention.

FIG. 3 is a perspective view showing the structure of a die.

FIG. 4 is an explanatory view showing the movement of the die during pressure welding work,
(A) shows before starting the work, (B) shows when the wire rod is clamped by a die, (C) shows when the wire rod is in pressure contact, and (D) shows when the pressure welding ends.

5A and 5B are explanatory views showing the movement of the die during deburring work. FIG. 5A is before the work is started, and FIG. 5B is when the insert plate is sandwiched between the dies, and FIG. When the wire member is sandwiched by the die pieces, (D) shows a burr removing operation.

6 is an enlarged view around the die hole of FIG. 5, (A) of FIG.
It corresponds to A, (B) corresponds to FIG. 6C, and (C) corresponds to FIG. 6D.
Corresponding to.

7A and 7B are explanatory views of a conventional wire rod pressure welding work, in which FIG. 7A shows the time when the pressure welding is completed, and FIG.

[Explanation of symbols]

1 Main body 2 Lever 3 Grip part 4 Spring
5 Finger 6 Die 6a, 6b, 6c, 6d Die piece 7 Insert plate 8
Booster lever 9 Moving V block 10 Fixed V block 11 Inclined surface

─────────────────────────────────────────────────── ─── Continuation of front page (73) Patent holder 000213884 Sumitomo Asahi Seiko Co., Ltd. 6-3 Kitagawara, Itami City, Hyogo Prefecture (72) Inventor Kazuhiko Nakano 5-4-9 Shinjuku-ku, Tokyo Tokyo Electric Power Co., Ltd. Tokyo West Branch (72) Inventor Takashi Nouchi 4-9-25 Shibaura, Minato-ku, Tokyo Tokyo Communication Network Co., Ltd. (72) Inventor Masatoshi Amamiya 1-14 Nishigotanda, Shinagawa-ku, Tokyo No. 8 Japan Field Engineering Co., Ltd. In-house (72) Inventor Kiyoshi Ogawa 2 20-20 Toda, Itagawa City, Itami City, Hyogo Prefecture Within Asahi Metal Seiko Co., Ltd. (72) Eiji Kusuka Kitagawara character, Itami City, Hyogo Prefecture 2 at Asahi Metal Seiko Co., Ltd., No. 20 (56) Reference JP-A-8-57662 (JP, A) JP-A-60-24290 (JP, A) JP-A-57-1591 (JP, A) Actual Kaihei 7-15228 (JP, U) Japanese Patent Publication No. 44-20859 (JP, B1) Japanese Patent Publication No. 5-12075 (JP, B2) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) B21F 15/08 B23D 29/02 B23K 20/00-20/26

Claims (2)

(57) [Claims] 1. A main body, a lever pivotally attached to the main body, a fixed V block held by the main body, a moving V block arranged to face the fixed V block, and between these V blocks. Equipped with a die that is assembled and forms four die pieces to form a die hole, and two pairs of fingers that hold and release the wire rod that is inserted in abutment with the die hole, and moves by rotating the lever. A cold pressure welding tool for pressing a V block to compress and join a wire material held in a die hole, wherein an insert plate is provided on a pair of fingers of the two pairs of fingers, and the insert plate opens the finger. A cold pressure welding tool characterized in that it is sometimes sandwiched between die pieces and is configured to come out between the die pieces when the fingers are closed. 2. A die hole is formed by four die pieces incorporated between a fixed V block and a moving V block, and a wire rod is inserted into the die hole by butting the moving V block to the fixed V block side. By pressing, the wire material sandwiched between the die pieces is pressed and joined, and after this bonding is performed, the wire material is sandwiched between the two die pieces,
The moving V block is pressed so that the wire rod is not sandwiched between the remaining two die pieces and the moving V block is pressed, and the burr of the wire rod is removed by pressing the burr on the remaining two die pieces. Method for removing burrs from cold pressure welded wire.