JP4784923B2 - Feeder for transfer processing - Google Patents

Description

  The present invention relates to a feeding device for transfer processing.

  For example, multiple processing processes such as drawing, step forming, top forming, brim forming, brim tapping, trimming, flat surface correction, finishing drilling, and side drilling are arranged in parallel. Transfer press processing using a transfer press machine, in which, for example, an electrode of an electron gun or the like is sequentially sent from the drawing process to the side hole drilling process, is well known.

  In this case, as shown in FIG. 4, each processing step (FIG. 4 shows parts of a trimming step, a plane correction step, a finish drilling step, an idle step, and an idle step) as a feeding device for sequentially feeding a workpiece to each processing step. And a pair of feed bars 1a, 1b that extend along each processing step and reciprocate from the previous processing step to the next processing step by a moving mechanism (not shown). There is one in which fingers 2a, 2b are attached via springs 3a, 3b at positions corresponding to the respective processing steps of the feed bars 1a, 1b. In addition, 4g-4k is the upper metal mold | die in each process.

  In this feeding device, for example, a workpiece (not shown) processed in the flat surface correction processing step is sandwiched between fingers 2a and 2b and moved to the finishing drilling step, and moved downward during the processing in this processing step. Abuts against the outer surface of the mold 4i (the outer surface of the stripper in the finish drilling process) and spreads between the fingers 2a and 2b to release the workpiece, perform the finish drilling, and sandwich the workpiece The fingers 2a and 2b that have moved to the finishing drilling process return to the original plane correction processing process.

Figure 5 shows the configuration when the bottom dead center of the transfer press machine in the finish Liang step, the upper die 4 is composed of the punch 5, the punch holder 6, stripper 7, the punch holder 6 Figure indicates non press Installed in the upper mold holder. 8 is a lower mold holder, 9 is a die (lower mold), 10 is a workpiece, and 2a and 2b are fingers shown in FIG. That is, the workpiece 10 sandwiched between the fingers 2a and 2b is conveyed to a predetermined position in the drilling process, and the stripper 7 is lowered by the lowering movement of the upper die 4, and the stripper 7 is interrupted between the fingers 2a and 2b. 2a and 2b are pushed and spread, and thereby the workpiece 10 is released from the fingers 2a and 2b. The punch 5 descends almost simultaneously and forms a predetermined hole in the workpiece 10.

  By the way, in the workpiece feeding device described above, since the fingers 2a and 2b are spread by the upper molds in each processing step, especially in the drilling step, the spring 3a to which the fingers 2a and 2b are attached, The force of 3b acts on the stripper 7, and punching may be performed in a state where the punch 5 is tilted and restrained by the action. For this reason, there are problems that the machining accuracy of the drilling process is not stable, and the life of the mold for drilling is short.

  The problem to be solved by the present invention is to reduce the action of the force of the spring mounting the fingers on the stripper in a finishing drilling process that requires particularly high machining accuracy, thereby eliminating such problems. It is in.

The present invention has fingers that are attached to each of a pair of feed bars through springs so as to contact each other, and the springs of the springs come into contact with the outer surfaces of the upper mold where the machining process descends between the opposing fingers. In the transfer press processing feed device, which spreads against the force and opens the workpiece sandwiched between the opposing fingers, the length of the finger sent to the drilling process is adjacent to the drilling process and a length that reaches the outer surface of the upper mold descending processing steps of the opening of the fingers sent to the drilling process with sandwiching the workpiece, lower than the mold in the drilling process It is characterized by being spread out on the outer surface of the upper mold of the adjacent processing step that protrudes into the area.

According to the present invention, in the finishing drilling process, the expansion between the fingers is expanded by the outer surface of the upper mold of the adjacent processing process protruding downward from the mold in the drilling process and adjacent processing. Since it is performed on the outer surface of the upper mold of the process, there is no force acting on the stripper due to the opening of the fingers when finishing drilling, so the punch is not constrained by the stripper, thereby constantly increasing the drilling processing accuracy In addition, the life of the punching mold can be extended.

  In the finish drilling process, which requires particularly high machining accuracy, the purpose is to reduce the action of the spring force to which the finger is attached to the stripper. In the finish drilling process, the finger located in that process is moved to that process. This is realized by setting the length to reach the outer surface of the upper mold (the outer surface of the thimble) adjacent to the upper die.

  FIG. 1 is a plan view showing a configuration of a transfer press working feeding device according to an embodiment of the present invention in a state where fingers are spread apart. In addition, the same code | symbol is attached | subjected to the part same as the feed apparatus for transfer press processing shown in FIG. In FIG. 1, 2a and 2a1-2a4 are fingers attached to one feed bar 1a of a pair of feed bars 1a, 1b via a spring 3a, and 2b and 2b1-2b4 are the other of the pair of feed bars 1a, 1b. Fingers attached to the feed bar 1b via springs 3a, fingers 2a and 2b, fingers 2a1 and 2b1, fingers 2a2 and 2b2, fingers 2a3 and 2b3, and fingers 2a4 and 2b4 face each other.

  One end of the pair of fingers 2a3 and 2b3 positioned in the finishing drilling step is in contact with the outer surface of the upper mold 4h in the plane correction step, which is a previous step of the finishing drilling step, as shown in FIG. The other end is in contact with the outer surface of the upper mold 4j in the idle process, which is a process subsequent to the finishing drilling process. That is, the length of the pair of fingers 2a3 and 2b3 positioned in the finishing drilling process is set to a length that reaches the upper mold of the process adjacent to both sides of the finishing drilling process. Then, the lengths of the pair of fingers 2a2 and 2b2 and the pair of fingers 2a4 and 2b4 are shortened by increasing the lengths of the fingers 2a3 and 2b3.

  In the transfer processing feeding apparatus configured as described above, each pair of fingers 2a1, 2b1, 2a2, 2b2, 2a3 and 2b3, 2a4 and 2b4, 2a and 2b are located in the previous process of the process shown in FIG. The workpiece processed in the process (not shown) is held between each pair of fingers and moved to the next process. After the movement, the upper molds 4g to 4k of the respective processes are lowered all at once, and the pair of fingers are resisted against the spring force of the spring 3a on the outer surface of each of the upper molds 4g, 4h, 4j and 4k. Press to open the work piece.

  At this time, since the fingers 2a3 and 2b3 sandwiching the workpiece processed in the flat surface correction processing step have a length that reaches the upper mold adjacent to both sides, as shown in FIG. As shown in FIG. 3, the pair of fingers 2a3 are in contact with the outer surfaces (usually the outer surfaces of the thimble) of upper molds 4h and 4j (not shown in FIG. 3) adjacent to each other without contacting the stripper 7. The workpiece 10 is released by expanding the space 2b3. By this expansion, the spring force of the spring 3a is not applied to the stripper 7, and the punch 5 is not restrained by the stripper 7 and can always form a highly accurate hole. 2 corresponds to FIG. 5, and the same reference numerals are given to the same parts as those of the transfer press shown in FIG.

It is a top view which shows the structure of the feeder for a transfer process which concerns on the Example of this invention in the state which pushed and expanded between fingers. It is a front view which shows the structure at the time of the bottom dead center of the transfer press machine in the finishing drilling process by the feeder for transfer processing concerning the Example of this invention. It is operation | movement explanatory drawing at the time of the bottom dead center of the transfer press machine in the finishing drilling process by the feeding apparatus for transfer processing concerning the Example of this invention. It is a top view which shows the structure of the conventional feeder for a transfer process in the state which pushed and expanded between fingers. It is a front view of the transfer press machine in the finishing drilling process by the feeding device for transfer processing.

Explanation of symbols

1a, 1b Feed bar 2a, 2a1-2a4, 2b, 2b1-2b4 Finger 3a, 3b Spring 4, 4g, 4h, 4i, 4j, 4k Upper die 5 Punch 6 Punch holder 7 Stripper 8 Lower die holder 9 Die (lower Mold)
10 Workpiece

Claims (1)

Each of the pair of feed bars has fingers attached to each other via springs, and abutting between the opposing fingers against the outer surface of the upper mold where the machining process descends, resists the spring force of the springs. In the transfer press processing feeding device formed by opening and spreading the workpiece sandwiched between the opposing fingers, the length of the finger to be sent to the drilling process is set in the processing process adjacent to the drilling process. and a length that reaches the outer surface of the upper mold descending, the projecting opening of the fingers sent to the drilling process with sandwiching the workpiece below the mold in the drilling process A transfer press working feeding device characterized by being spread on the outer surface of an upper die of an adjacent processing step .

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