JPH0374461B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a sealing plate which is formed into a shape that hugs the periphery of the terminal cap, with a safety valve interposed between the sealing plate having gas vents and the terminal cap. The present invention relates to an improvement in an assembly device for sealing parts for a cylindrical battery, in which a terminal cap is integrated by caulking around the periphery.

Prior Art As shown in FIG. 5a, a safety valve 4 is interposed between a sealing plate 2 made of a nickel-plated iron plate having a gas vent 1 and a terminal cap 3 made of a nickel-plated iron plate, and the periphery of the terminal cap 3 is enclosed. When the terminal cap 3 is crimped and integrated around the periphery of the sealing plate 2 molded into the shape, conventionally the sealing plate 2 and the safety valve are placed in the recess of the crimping die 5, as shown in FIGS. 5b and 5c. 4 and terminal cap 3
Place the combinations in this order, and use the temporary caulking punch 6 from above.
After press-fitting into the recess and performing temporary crimping (Fig. 5 b), the final crimping punch 7 is again press-fitted into the recess from above to perform final crimping [Fig. 5 c]. Complete the sealing part shown in d.

In FIG. 5, reference numeral 8 indicates a protruding rod that projects the assembled sealing component upward, and 9 indicates a caulking portion of the sealing component.

Problems to be Solved by the Invention Conventionally, crimping is performed in two stages (temporary crimping and final crimping), which increases the cost of equipment and molds. I needed to.

Means for Solving the Problems In order to solve such problems, the present invention provides a hole passing through the center of the recessed space recess 10a for processing provided on the upper surface of the staking die 10, as shown in FIG. 1b. 11, set the caulking stand center 12 with an O-ring 13 interposed therebetween so that it can move up and down,
As shown in FIG.
The terminal caps 3 are placed in this order and pressed from above in the direction of the arrow with a crimping punch 14 having a concave portion on the lower surface with the terminal cap 3 raised above the bottom surface of the concave portion of the crimping die 10.

Function By providing the bottom surface 14a of the crimping punch 14, that is, the part in contact with the sealing plate of the crimping punch, with an inclined conical surface that is high at the outer circumference and becomes lower toward the inside, the pressure of the crimping press required by the device can be applied. It was possible to reduce the capacity (processing became possible even with a small press).

If the inclination α of the bottom surface 14a of the crimping punch 14 was 0°, that is, in the case of a flat structure, a 5-ton capacity crimping press machine would be required;
By providing 4a with a 3° inclination, it was possible to reduce the pressurizing capacity of the crimping press to 2 tons, making the device even more compact and inexpensive.

Embodiment As shown in FIG. 1b, a crimping stand center 12 can be moved up and down by interposing an O-ring 13 into a hole 11 penetrating the center of a concave space 10a for processing provided on the upper surface of a crimping die 10. Place the terminal cap 3, the rubber safety valve 4, and the sealing plate 2 in this order on the staking die center 12 as shown in FIG. By pressing from above in the direction of the arrow with the caulking punch 14 having a concave portion on the lower surface while the sealing plate 2 is in the crimped state, the periphery of the sealing plate 2 is aligned along the R provided in the enclosing molded portion A of the concave portion 10a of the caulking die 10. The terminal cap 3 is held in place while crimping is carried out, and the sealing part shown in FIG.
The product, the sealing part, was no longer sagging at the caulking position, and the quality was stable. Here again, caulking punch 14
By providing a conical surface with an inclination α such that the outer periphery is high and the pressure decreases toward the inside on the bottom surface 14a, that is, the part that contacts the sealing plate of the crimping punch, the pressurizing capacity of the crimping press of the device can be reduced. Furthermore, if the slope α of the bottom surface 14a of the crimping punch 14 was 0°, that is, a flat structure would have required a 5-ton capacity staking press machine, but by providing the bottom surface 14a with a 3° slope,
We were able to reduce the pressurizing capacity of the caulking press by 2 tons, making the device even more compact and inexpensive.

In addition, the O that is fitted in the caulking center 12
The action of the ring 13 is to raise the terminal cap 3 etc. slightly above the bottom surface of the recess of the crimping die 10 before press pressure is applied to the crimping punch 14, so that the periphery of the sealing plate 2 can easily embrace the periphery of the terminal cap 3. It also serves to push the sealing part upward after caulking.

Here, the molding die radius R of the enclosing molding part A part of the crimping table 10 shown in FIG. 2 is set to be equal to or slightly larger than the product shape radius R of the molding surface B part of the sealing part shown in FIG. can be done quickly.

On the other hand, by assembling several crimping dies 10 into an index table, rotating the index, and performing crimping presses one after another with the crimping punch 14, the terminal caps 3, By automatically supplying the safety valve 4 and the sealing plate 2, productivity can be increased by automatically discharging the sealing parts, which are press products.

Effects of the Invention As described above, the present invention can shorten the conventional two-step caulking process to one, making the device simpler and cheaper, as well as stabilizing product quality and increasing the speed of commercialization. The industrial value is enormous, such as increased productivity, improved productivity, and lower product prices.

[Brief explanation of drawings]

FIG. 1 shows the assembly of a sealing part for a cylindrical battery using an assembly apparatus according to an embodiment of the present invention.
a is an explanatory diagram of the sealing part before caulking, b is an explanatory diagram of caulking of the assembly device, c is an explanatory diagram of the sealing part after caulking, FIG. 2 is an enlarged explanatory diagram of part A in FIG. 2 d, and third The figure is an enlarged explanatory view of part B in Fig. 2c, Fig. 4 is an enlarged explanatory view of part C in Fig. 1b, and Fig. 5 is an assembly state of the sealing part of a cylindrical battery using a conventional assembly device. , a is an explanatory diagram of the sealing part before crimping, b is an explanatory diagram of temporary crimping of the assembly device, c is an explanatory diagram of the final crimping, and d is an explanatory diagram of the sealing part after crimping. 1 is a gas vent, 2 is a sealing plate, 3 is a terminal cap, 4 is a safety valve, 9 is a caulking part, 10 is a caulking die, 10a is a recess, 11 is a hole, 12 is a caulking die center, 13 is an O-ring, 14 is Caulking punch, 14a is the bottom of the caulking punch.

Claims (1)

[Claims] 1. A cylinder in which a safety valve is interposed between a sealing plate having a gas vent and a terminal cap, and the terminal cap is caulked into one body by the periphery of the sealing plate, which is shaped to embrace the periphery of the terminal cap. In an assembly device for sealing parts for battery cells, a cylindrical crimping die center is positioned in advance so as to lift the terminal cap, and an O-ring is attached to the crimping die center in the center of the recessed space provided on the top surface for processing. A cylindrical crimping die having a hole therebetween, which is set so as to be movable up and down, and the periphery of the sealing plate are press-fitted into the recess so that the periphery of the terminal cap is hugged along the recess and crimped. An apparatus for assembling sealing parts for a cylindrical battery composed of a crimping punch, characterized in that the bottom surface of the crimping punch in contact with the sealing plate is sloped so as to form a conical surface that is higher on the outside and lower toward the inside. Sealing parts assembly equipment.