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Patent Searching and Data


Title:
DETECTING DEVICE FOR BITING OF TUBE MATERIAL
Document Type and Number:
Japanese Patent JPS5970424
Kind Code:
A
Abstract:

PURPOSE: To obtain a sure biting detection signal of a tube material in piercing a tube material by a barrel-shaped roll and a plug at the tip of a mandrel bar by detecting compressive force acting on the mandrel bar.

CONSTITUTION: A mandrel bar 2 is connected to a thrust block 1 and a plug 3 is connected to the tip of the mandrel bar 2. A load detector 31 that detects compressive force that acts on the mandrel bar 2 is provided in the thrust block 1. In piercing a tube material 21 by a barrel-shaped roll 22 and a plug 3, a signal from the mandrel load detector 31 is compared with the set value of a load setting device 41. When a biting detector 42 detects that detected value of the detector 31 becomes larger than set value of the setting device 41, a signal 43 that indicates correct biting is outputted.


Inventors:
KII HIROYUKI
Application Number:
JP17851982A
Publication Date:
April 20, 1984
Filing Date:
October 13, 1982
Export Citation:
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Assignee:
TOSHIBA KK
International Classes:
B21B19/04; B21B37/00; B21B37/78; (IPC1-7): B21B19/04; B21C51/00
Attorney, Agent or Firm:
Noriyuki Noriyuki