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Press

Inactive Publication Date: 2013-10-24
KOJIMA PRESS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a structure that allows a press to hold a number of pairs of dies and easily move them to a position for pressing. This means that the dies can be changed without removing them from the press, which speeds up processing and makes the press more efficient. This structure also allows the press to use other pairs of dies while processing workpieces, reducing waiting time and increasing production efficiency.

Problems solved by technology

In the prior art described above, however, in order to perform another processing step using a single press, dies must be removed from the press for exchange, which takes some time and trouble.

Method used

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first embodiment

[0025]the present invention will be described with reference to the drawings. FIGS. 1 to 3 respectively show a front view, a plan view and a side view of a press 10. As shown in FIG. 1, the press 10 has a table 11 at the bottom, and a crown 12, an upper plate, at the top. A crown 12 and the table 11 are tied with two vertical struts 13 fastened by bolts. A rotation shaft 23, which will be described later, also functions as a strut, so that the crown 12 is virtually supported by the rotation shaft 23 and the struts 13.

[0026]In the center of the press 10 is provided a revolver 20 rotatable about a vertical axis. The revolver 20 has four holders 30 suspended from it. Each of the holders 30 supports three pairs of forming dies 40a, 40b and 40c in series. As shown in FIG. 3, below the top plate 111 of the table 11, there is provided with a hydraulic cylinder 50 as a driving source of press, and a servo motor 60 as a driving source for rotating the revolver 20. As shown in FIGS. 4 to 7, t...

second embodiment

[0048]the present invention has been described above. According to this embodiment, after each pressing operation is completed, the revolver 20 is rotated, the dies holding the workpieces that has been pressing process is moved to a position different from the pressing position while another holder is moved to the press position. Therefore, it is possible to carry out processing steps in the dies of another holder, without waiting for the completion of transfer of processed workpieces. Therefore, it is possible to provide a press with good production efficiency and can reduce the time required for production. According to this embodiment, processes of processing parts A, B, C and D are completed in turn one by one. Assembly process of parts may be started as soon as all kinds of parts are collected by one piece for each kind, and this can contribute to an improved efficiency in production process.

[0049]A third embodiment of the present invention will be described with reference to t...

third embodiment

[0050]A flow of producing parts A, B and C of the third embodiment will be described. For FIG. 14 (a) shows a condition in which the holder 30a in the pressing position, the holder 30b, the holder 30c, the holder 30d are arranged counterclockwise in this order. The kinds of parts A, B and C each requires four steps to produce. The production processes for these kinds of parts are assigned to the lower, middle and upper rows of dies respectively so that their final processing step belong to different holders. As shown in FIG. 15, the final steps for each part A, B and C fall in the holders b, c and d, respectively.

[0051]First, the hydraulic cylinder is controlled by the control device to carry out a pressing operation described above on the holder 30a in the pressing position as in FIG. 14(a). The workpieces Y0, X1, W2 becomes workpieces Y1, X2, W3 through the processing steps C1, B2, A3, respectively, as shown in FIG. 14 (c). During this pressing operation, the transfer device is co...

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Abstract

A press including a number of pairs of dies each clamped by a driving source to press set work pieces in a vertical direction, and a revolver holding the pairs of dies and rotatable around a vertical axis, wherein the revolver by rotating moves any pair of dies to a pressing position where pressing process is performed.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a 35 U.S.C. §371 national stage application of PCT / JP2010 / 071391 filed Nov. 30, 2010, which is hereby incorporated herein by reference in its entireties for all purposes.TECHNICAL FIELD[0002]The present invention relates to a press. More particularly, the present invention relates to a press clamping a pair of dies in the vertical direction by a drive source and pressing process a workpiece set in the dies.BACKGROUND ART[0003]Japanese Laid-Open Patent Publication No. 2001-300780 discloses a currently known press. This press clamps a pair of dies in the vertical direction by means of a driving source to press a workpiece set in the dies.SUMMARY OF THE INVENTION[0004]In the prior art described above, however, in order to perform another processing step using a single press, dies must be removed from the press for exchange, which takes some time and trouble. An object of the present invention is to provide a press in whic...

Claims

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Application Information

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IPC IPC(8): B21D22/08
CPCB21D22/08B21D24/005B21D35/003B30B7/02B30B7/023B30B15/028
Inventor KITAI, EIJI
Owner KOJIMA PRESS IND CO LTD
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