JP2636433B2 - Contact manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Industrial applications]

The present invention relates to a method for manufacturing a contact used for a thermal relay or the like.

[Prior art]

FIG. 3 is a schematic side view showing a conventional method, 1 is a long contact material having a mushroom-shaped cross section, 2 is a cut die, 3 is a butting block facing the cut die 2 at a predetermined interval, and 4 is a punch. Reference numeral 5 denotes a caulking die, and reference numeral 6 denotes a bonding base placed on the caulking die 6. Although not shown, the cut die 2 is divided into upper and lower parts, and a hole having the same contour as the cross-sectional shape of the contact material 2 is formed on the mating surface. The contact material 2 is guided from the left to the right in the figure by a feed mechanism (not shown) through this hole,
The tip is abutted against the abutment block 3. Therefore,
The punch 4 descends along the cutting die 2, and the cutting die 2
The tip part 1a of the contact material 1 protruding from is cut off. FIG. 4 shows the contact material 1a cut off.
FIG. 4A is a front view, and FIG. 4B is a side view. As shown, the cross-sectional shape of the contact material 1a is a mushroom shape as described above, and the entire length shown in FIG. 4 (B) is the same as the distance between the cut die 2 and the abutment block 3. The contact material 1a cut off by the punch 4 falls downward as it is. On the other hand, on the caulking die 5, a contact base 60 having a square hole at the position where the contact material 1a falls is provided. Then, the contact material 1a is received by the base metal 6, and the lower half of the foot enters the square hole of the base metal 6. During this time, the punch 4 continues to be lowered, and when the contact material 1a is received by the base metal 6, it is squeezed between the caulking die 5 and caulked to the base metal 6.

[Problems to be solved by the invention]

In such a conventional method, the contact material 1a cut off by the punch 4 is likely to rotate in the air and collapse its posture before falling and reaching the base 6, so that the foot of the contact material 1a Caulked without being able to enter the hole exactly,
The base metal 6 may be deformed or the contact material 1a may be insufficiently swaged. SUMMARY OF THE INVENTION An object of the present invention is to provide a method of manufacturing a contact in which a contact material cut off by a punch and falling is prevented from rotating in the air, and the contact material is securely caulked to a base metal. is there.

[Means for Solving the Problems]

In order to achieve the above object, the present invention relates to a punch in which a tip of a long contact material protruded horizontally from a cut die abuts against a contact block facing the cut die, and is lowered along the cut die. A method of manufacturing a contact, in which the projecting portion of the contact material is cut off, the dropped contact material is received by a base on a caulking die, and the contact material is caulked to the base with the punch descending continuously.
The cutting dies and the cutting blade surfaces of the punch are formed with ridges (or grooves) and grooves (or ridges) that mesh with each other, so that the long contact material has a convex or concave planar shape at the tip. And forming a concave groove or a ridge on the contact material abutting surface of the abutment block for abutting the tip of the contact material to be fitted with the convex or concave shape of the contact material tip. .

[Operation]

In the contact material cut off by the punch, the convex part (or concave part) and the concave part (or convex part) of the front and rear ends are respectively the concave groove (or convex line) of the abutting block and the convex line (or concave groove) of the cut die.
Since it is guided and falls, it does not rotate and lose its posture.

FIG. 1A is a plan view showing an embodiment of the present invention.
FIG. 2 (B) is a side view thereof, FIG. 2 (A) is a plan view of a contact material cut off from a long contact material, FIG. 2 (B) is a side view thereof, and FIG. It is a front view. The same or corresponding parts as in the conventional example are denoted by the same reference numerals. In FIG. 1, a ridge 2a and a concave groove 4a meshing with each other are formed on the cutting edge surfaces of the cut die 2 and the punch 4, and the contact material abutment surface of the abutment block 3 and the opposing surface of the punch 4 in contact therewith. The groove 3a and the ridge 4b are formed respectively. Here, the concave groove 3 a of the abutment block 3 is aligned with the ridge 2 a of the cut die 3. Other configurations are the same as those in FIG. In the illustrated configuration of the cut die 2, the abutment block 3, and the punch 4, the punch 4 descends with the concave groove 4a and the convex ridge 4b being engaged with the convex ridge 2a of the cut die and the concave groove 3a of the abutment block 3, and the long contact material. 1 is cut so that the planar shape of the tip becomes convex. On the other hand, the mating cut surface of the contact material 1a which is cut off and falls is concave as shown in FIG. 2 (A). The contact material 1 whose tip is cut into a convex shape is abutting block 3
Is fitted into the concave groove 3a. When the contact material 1 is cut by the punch 4 in this state, the cut-off contact material 1a is guided by the concave groove 3a of the abutment block 3 and the convex ridge 2a of the cut die 2 at the front and rear ends, respectively. , Falls onto the base metal 6 without rotating. Therefore, the foot of the contact material 1a accurately enters the not-shown square hole of the base metal 6, and the subsequent caulking is performed correctly. In the illustrated embodiment, the cut surface of the long contact material 1 is made to be convex. However, the concave-convex relationship between the cut die 2, the abutment block 3, and the punch 4 is reversed from that shown in the drawing, and The cut surface of the contact material 1 may be made concave.

【The invention's effect】

According to the present invention, since the contact material separated from the long contact material does not rotate and lose its posture until it reaches the base metal, the subsequent caulking work is performed stably, and the deformation of the base metal and Poor crimping of the contacts is eliminated.

[Brief description of the drawings]

1 (A) is a schematic plan view showing an embodiment of the present invention, FIG. 1 (B) is a side view thereof, and FIG. 2 (A) is cut off from a long contact material in the embodiment of FIG. FIG. 2 (B) is a side view, FIG. 2 (C) is a front view, FIG. 3 is a side view showing a conventional example, and FIG. 4 (A) is a conventional example. 4 is a front view of the contact material cut off from the long contact material, and FIG. 4 (B) is a side view thereof. 1,1a ... Contact material, 2 ... Cut die, 2a ... Protrusion, 3 ...
… Abutment block, 3a …… a concave groove, 4 …… a punch, 4a …… a concave groove, 4b …… a ridge, 5 …… a caulking die, 6 …… a base metal.

Claims (1)

(57) [Claims] An end of a long contact material protruding horizontally from a cut die is abutted against an abutment block facing the cut die, and a protruding portion of the contact material is lowered by a punch lowered along the cut die. In the method of manufacturing a contact in which the contact material that has been cut off and dropped is received by the base on the caulking die and subsequently lowered by the punch, the contact material is caulked to the base with the cutting edge surface of the cut die and the punch. A ridge (or groove) and a groove (or ridge) are formed, and the long contact material is cut so that the planar shape of the tip is convex or concave. A contact groove on the contact material abutting surface of the abutment block, the groove being fitted to the convex shape or the concave shape at the tip of the contact material.