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Title:
BOX-BENDING PUNCHING DIE THAT DOES NOT CAUSE SHEET METAL POSITION ERROR
Document Type and Number:
WIPO Patent Application WO/2018/025630
Kind Code:
A1
Abstract:
Provided is a box-bending punching die with which the product accuracy of a box-shaped product can be sufficiently increased by eliminating a sheet metal position error immediately prior to bending a portion to be bent of a sheet metal. Each fixed punch 18 is provided with a movable punch 24 on a side portion thereof which is movable in a vertical direction along a fixed-side inclined surface 18s. The movable punch 24 also includes a movable-side inclined surface 24s on the outside in a width direction which is inclined in the same direction as the fixed-side inclined surface 18s of the fixed punch 18. The movable punch 24 includes a tab portion 26 on the lower end side thereof. An air cylinder 54 is provided on a back surface of the fixed punch 18 via a guide plate 40. A hook member 64 is integrally provided on a distal end portion of an actuation rod 58 of the air cylinder 54 via a coupling member 60 and a slide pin 62. The hook member 64 is enabled to lock on a lock bolt 66 from below which is integrally provided at an appropriate position of the movable punch 24 via a movable plate 28.

Inventors:
SHIKANAI Hirokatsu (200 Ishida, Isehara-shi Kanagawa, 96, 〒2591196, JP)
IWAI Masaki (200 Ishida, Isehara-shi Kanagawa, 96, 〒2591196, JP)
Application Number:
JP2017/026025
Publication Date:
February 08, 2018
Filing Date:
July 19, 2017
Export Citation:
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Assignee:
AMADA HOLDINGS CO.,LTD. (200 Ishida, Isehara-shi Kanagawa, 96, 〒2591196, JP)
International Classes:
B21D5/01; B21D5/02; B21D37/02
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (Toranomon Kotohira Tower, 2-8 Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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