JPH05169182A - Method for working bushing for battery pole and forging header and thread rolling device used for the same - Google Patents

Abstract

PURPOSE:To improve the productivity in the manufacture of a bushing and to prevent the development of burr in an axial direction on the outer peripheral surface of a supporting part. CONSTITUTION:This method forming the bushing for a battery pole is provided with the supporting part having a terminal part at the one side and projecting plural annular ribs on the other peripheral surface at the other side and having a pole hole on the axis. A long work W is cut to a prescribed size by a shear cutting device 1 (work cutting means), and the work Wa after cutting is forged into a bushing upset body Wb forming no annular rib by a forging die set 11 capable of attachment/detachment in the wok axial direction. Then, further, this method is consisting of a header working process for removing the burr 19 produced around the intermediate part of the bushing upset body Wb from joining gap of the forging die set 11 by a compressing type set 21 capable of attachment/detachment in the work axial direction and a rib forming process for forming the annular rib to the bushing upset body Wc after header working by cutting or thread-rolling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bushing a battery pole column, a forged header and a rolling device used for the method.

[0002]

Bushings for battery poles are entirely made of lead or lead-antimony alloy, and are provided with a terminal portion on one side and a support portion with a plurality of annular ribs protruding from the outer peripheral surface on the other side.
Moreover, it has a pole hole on the axis. When using the bushing, the supporting part is vertically embedded and fixed in the resin case lid, the terminal part protrudes upward from the case lid, and the pole pillar connected to the electrode plate is further inserted into the pole hole from below. The connector on the power receiving side is connected to the terminal portion by being fitted and welded to the tip of the terminal portion.

Conventionally, the bushing has been mass-produced by casting, and recently, a manufacturing method by cold pressing has been proposed as disclosed in US Pat. No. 4,776,197. However, the bushing has an annular shape on the outer peripheral surface thereof. Since split molds are used to form the ribs, opening / closing operations of the split molds are required for each molding of the bushings, and axial burrs that cross the annular ribs are generated on the outer peripheral surface of the support portion. There was a problem. Thus, the opening / closing operation of the split mold becomes a significant factor that lowers the productivity in the bushing manufacturing process, and the flash on the outer peripheral surface of the support part is particularly effective when the support part is buried during molding of the battery case lid. This hinders smooth flow of the molding resin material of the tank lid to the outer peripheral surface of the support portion, reduces the shaft sealing effect of the annular rib, and facilitates leakage of the electrolytic solution.

[0004]

DISCLOSURE OF THE INVENTION An object of the present invention is to improve the productivity in bushing production and to prevent axial burrs from being generated on the outer peripheral surface of the support portion. It is to provide a rolling device.

[0005]

SUMMARY OF THE INVENTION A bushing method for a battery pole according to the present invention comprises a terminal portion on one side and a support portion on the other side having a plurality of annular ribs projecting from an outer peripheral surface thereof, and a shaft. It is a method of forming a battery pole pole bushing having pole column holes on the wire, by cutting a long work into a predetermined dimension by a work cutting means, and by a forging die set that can separate the work after the cutting in the work axis direction. A compression mold set that can be pressed and forged into a bushing upsetting body in which annular ribs are not formed in the support part and pole column holes are not penetrated in the top surface of the terminal part, and the bushing upsetting body after forging is brought into contact with and separated from the work axis direction. And the bushing upsetting body, which removes burrs that occur around the middle part of the bushing upsetting body and penetrates the pole hole on the top surface of the terminal part, and the bushing upsetting body support after the header processing. It is made of the rib forming step of forming by cutting or rolling the annular rib section.

The bushing forged header for battery pole according to the present invention is used in the header processing step, and includes (a) a work cutting means for cutting a long work into a predetermined size, and (b) after cutting. Is forged into a bushing upsetting body in which the annular rib is not formed in the support portion and the pole hole is not penetrated in the top surface of the terminal portion, and the first concave portion having a shape corresponding to the bushing terminal portion is provided. Equipped with a forging die and a second recess having a shape corresponding to the bushing support portion without annular ribs, and a punch having a shape corresponding to the bushing pole column hole, which is arranged in the center, and can be brought into contact with and separated from the first forging die. A forging die set consisting of a second forging die arranged in
(C) A third recess and a bottom portion of the bushing upsetting body, which removes burrs generated around the middle part of the bushing upsetting body and allows a pole hole to pass through the top surface of the terminal portion and which can be fitted with the bushing upsetting body terminal portion. A first compression type having a punch hole communicating with the bushing upsetting body, and a punching hole punchable from the pole column hole of the bushing upsetting body to the punch hole, and a shape corresponding to the intermediate part of the bushing upsetting body arranged around the punching punch. A compression mold set including a deburring blade and a second compression mold arranged so as to be able to come into contact with and separate from the first compression mold.

Furthermore, the bushing rolling device for battery poles according to the present invention is used in the rib forming step,
A fixed die having a fourth recess that can be fitted to the bushing upset body terminal portion after the header processing, and is evenly arranged on the fixed die so as to be planetary movable and radially movable with respect to the center axis of the fourth recess, It consists of three rolling rollers having a shape corresponding to the bushing annular rib.

[0008]

In the bushing processing method of the above construction, in the first header processing step, the long work is cut into a predetermined length, the annular rib is not formed in the support portion, and the pole column hole is not penetrated in the top surface of the terminal portion. Forging into the upsetting body, removal of burrs from the bushing upsetting body, and penetration of the pole post are performed continuously. Since there is no complicated process for forming the annular rib in the header processing process, the bushing upsetting body can be easily mass-produced.

In the forging header used in the header processing step, a known transfer feeder or the like can be used for transferring the work or the bushing upset to the work cutting means, the forging die set and the compression die set.

In the next rib forming step, annular ribs are formed by cutting or rolling, which is a processing method which does not cause axial burrs on the bushing upsetting body supporting portion after header processing transferred by a parts feeder or the like. And a finished bushing is obtained.

[0011]

1 and 2 are cross-sectional views of essential parts of a forging header and a rolling device used in a method for processing a battery pole pillar bushing according to the present invention, and FIG. 3 is a front view of a completed battery pole pillar bushing. Is.

In FIG. 1, a forging header H comprises a shear shearing device 1 as a work cutting means and a forging die set 11.
And the compression mold set 21, the long work W is first intermittently transferred to the shear shearing device 1. The long work W may be hollow.

The shear shearing device 1 comprises a guide hole 2 provided horizontally, a cutting blade 3 provided on the opening of the guide hole 2 so as to be movable at a right angle to the axis of the guide hole 2, and a guide hole 2.
And a protrusion bar 5 that is movably inserted into the protrusion hole 4.

In the shear shearing device 1, the long work W is cut into a certain size by the cutting blade 3 while being guided by the guide hole 2, and the cut work Wa is taken out by the advancing protruding bar 5 and the transfer feeder ( (Not shown), it is transferred to the adjacent forging die set 11.

The forging die set 11 comprises a first forging die 12 arranged horizontally and a second forging die 13 arranged so as to be able to come into contact with and separate from the first forging die 12, and the first forging die 12
Includes a first recess 14 having a shape corresponding to the bushing terminal portion, and the second forging die 13 has a second recess 15 having a shape corresponding to the bushing supporting portion having no annular rib and a bushing arranged at the center thereof. A punch 16 having a shape corresponding to the pole hole is provided. Further, the first forging die 12 is provided with a protrusion hole 17 communicating with the bottom portion of the first recess 14, and a protrusion bar 18 is movably inserted into the protrusion hole 17.

In the forging die set 11, the cut work Wa transferred from the shear shearing device 1 is put into the first recess 14 of the first forging die 12 and, if necessary, under heat and the second forging die. 13 is pressed to the first forging die 12 and the work Wa is compressed in the axial direction.
The first recess 14 of the second forging die 13 and the second recess 15 of the second forging die 13 and the punch 16 forge the bushing upsetting body Wb in which the annular rib is not formed in the support portion and the pole hole is not penetrated in the top surface of the terminal portion at once. To be done. The bushing upsetting body Wb after forging is taken out from the first recessed portion 14 of the first forging die 12 by the protruding bar 18 that advances as the second forging die 13 moves backward, and is adjacent by a transfer feeder (not shown). Transferred to the compression mold set 21. The middle part of the bushing upsetting body Wb is formed in a corrugated brim shape, and burrs 19 are generated around the middle part due to the bonding gap of the forging die set 11.

The compression mold set 21 comprises a first compression mold 22 arranged horizontally and a second compression mold 23 arranged so as to be able to come into contact with and separate from the first compression mold 22.
Includes a third recess 24 that can be fitted into the bushing upsetting body Wb terminal portion and a punch hole 25 that communicates with the bottom portion thereof.
The second compression mold 23 is a burr having a shape corresponding to an intermediate portion of the bushing upsetting body Wb, which is arranged around the punching punch 26 that can penetrate from the bushing upsetting body Wb pole hole to the punch hole 25. The blade 27 is provided. Further, a protruding bar 28 is movably inserted into the punch hole 25 of the first compression mold 22.

In the compression mold set 21, the forged bushing upsetting body Wb transferred from the forging mold set 11 is inserted into the third recess 24 of the first compression mold 22 from its terminal portion and fitted and fixed. The second compression die 23 is pressed against the first compression die 22, and the flash deburring blade 27 and the punch 26 of the second compression die 23 cut and remove the flash 19 around the intermediate portion of the bushing upsetting body Wb. Moreover, a pole hole is made to penetrate the top surface of the terminal portion. The bushing upsetting body Wc after the header processing is taken out from the third recess 24 of the first compression mold 22 by the protrusion bar 28 that advances as the second compression mold 23 moves backward, and is removed by a parts feeder (not shown). Transferred to the rolling device R.

As shown in FIG. 2, the rolling device R comprises a horizontally arranged fixed die 31 and three rolling rollers 32 (only one is shown) having a shape corresponding to the bushing annular rib. The fixed die 31 is provided with the fourth recess 33 that can be fitted with the bushing upset Wc terminal portion after the header processing, and each rolling roller 32 can be planetarily moved on the fixed die 31 with respect to the center axis of the fourth recess 33. Moreover, they are evenly arranged so as to be movable in the radial direction. Further, the fixed mold 31 has a fourth recess 33.
A protrusion hole 34 communicating with the bottom is formed, and a protrusion bar 35 is movably inserted into the protrusion hole 34.

In the rolling apparatus R having the above-mentioned structure, the bushing upsetting body Wc after header processing transferred from the compression die set 21 is transferred from its terminal portion to the fourth recess 3 of the fixed die 31.
The three rolling rollers 32, which are thrown in and fitted and fixed to each other 3 and rotate and revolve, are evenly arranged and abut on the side surface of the bushing upsetting body Wc support portion, and the annular rib is formed by rolling. The finished rolled battery pole post bushing is taken out from the fourth recess 33 of the fixed die 31 by the protruding bar 35 that advances as the rolling rollers 32 move backward.

As shown in FIG. 3, the battery pole pillar bushing B completed through the rolling device R is provided with a truncated cone-shaped terminal portion 41 on one side and a support portion 42 on the other side, and on the axis line. Has a pole column hole 43, a collar portion 44 in the middle, and a plurality of annular ribs 45 projecting from the outer peripheral surface of the support portion. In the present embodiment, the collar portion 44 is formed in the first recess 14 of the first forging die 12 as belonging to the terminal portion 41, but is formed in the second recess 15 of the second forging die 13 as necessary. May be. As in the present embodiment, the outer periphery of the collar 44 may be corrugated or gear-shaped.

[0022]

As described above, according to the bushing processing method for the battery pole of the first aspect, the productivity in the bushing manufacturing is improved and the flashing in the axial direction is not generated on the outer peripheral surface of the supporting portion. ..

Further, by using the forged header of the second aspect and the rolling device of the third aspect, the header processing step and the rib forming step in the bushing processing method can be favorably performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a forged header used in a method for bushing a battery pole column according to the present invention.

FIG. 2 is a lateral cross-sectional view of the essential parts of a rolling device used in the method for bushing processing for battery poles according to the present invention.

FIG. 3 is a front view of a completed bushing for a battery pole.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shear shearing device 11 Forging die set 19 Burr 21 Compressive die set 41 Terminal part 42 Support part 43 Polar pole hole 45 Annular rib B Battery pole pillar bushing W Long work Wa Work after cutting Wb Annular rib unformed bushing installation Incorporated body Wc Bushing upset body after header processing

Claims (3)

[Claims] 1. A method for forming a battery pole pole bushing having a terminal portion on one side and a support portion having a plurality of annular ribs protruding from the outer peripheral surface on the other side, and having a pole column hole on the axis. Yes, a long work is cut to a predetermined size by the work cutting means, the work after cutting is pressed by a forging die set that can be brought into contact with and separated from the work axial direction, and an annular rib is not formed in the support part and a pole on the top surface of the terminal part. Forging into a bushing upsetting body that does not penetrate the column hole, press the bushing upsetting body after forging with a compression mold set that can approach and separate in the work axis direction, and remove burrs that occur around the middle part of the bushing upsetting body. And a header forming step of penetrating the pole hole on the top surface of the terminal portion, and a rib forming step of forming an annular rib on the bushing upsetting body support portion after the header processing by cutting or rolling. Bushing method for battery pole pillars. 2. A forged header used in the header processing step according to claim 1, comprising: (a) a work cutting means for cutting a long work into a predetermined size; and (b) an annular rib in a supporting portion for cutting the work after cutting. Formed and forged into a bushing upset in which the pole column holes are not penetrated on the top surface of the terminal portion, the first forging die having a first recess having a shape corresponding to the bushing terminal portion, and a bushing having no annular rib formed From a second forging die which is provided with a second concave portion having a shape corresponding to the supporting portion and a punch having a shape corresponding to the bushing pole hole, which is arranged in the center of the concave portion, and which is arranged so as to be able to come into contact with and separate from the first forging die. And (c) a bushing upsetting body which removes burrs around the middle part of the upsetting body and penetrates the pole column hole on the top surface of the terminal portion, and can be fitted with the bushing upsetting body terminal portion. Third recess and its A first compression mold having a punch hole communicating with the bottom portion of the bushing, and a punching punch capable of penetrating from the pole hole of the bushing upsetting body pole hole to the punching hole and the middle portion of the bushing upsetting body arranged around the punching punch. A bushing forging header for a battery pole, comprising a compression die set including a second compression die, which is provided with a deburring blade having a curved shape and is arranged so as to be able to come into contact with and separate from the first compression die. 3. A rolling device used in the rib forming step according to claim 1, wherein the fixed die has a fourth recessed portion that can be fitted to the bushing upset body terminal portion after the header processing, and a fixed die having a fourth concave portion. A bushing rolling device for a battery pole, comprising three rolling rollers having a shape corresponding to the bushing annular rib, which are evenly arranged so as to be able to move in the planetary direction and move in the radial direction about the central axis of the four recesses.