Title:
PRESSURE WELDING QUANTITY DETECTOR FOR HIGH-FREQUENCY RESISTANCE WELDING PROCESS
Document Type and Number:
Japanese Patent JP3423034
Kind Code:
B2
Abstract:
PURPOSE: To provide the pressure welding quantity detector in the high-frequency resistance welding process capable of detecting accurately and rapidly the pressure welding quantity during welding.
CONSTITUTION: An image sensor 2 picks up an image in the vicinity of a welding starting point WS where the molten edge end faces E of an open pipe OP start to come into contact with each other. An image processor 4 obtain the distance L between the welding starting point WS and a welding finishing point WE and an angle θ formed between the edge and faces E based on the image and calculates an approximate value UA of the pressure welding quantity based on the axithmetic expression UA=2Ltan(θ/2).
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Inventors:
Hiroyuki Yoshikawa
Application Number:
JP18592193A
Publication Date:
July 07, 2003
Filing Date:
July 28, 1993
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
Sumitomo Steel Pipe Co., Ltd.
Sumitomo Steel Pipe Co., Ltd.
International Classes:
B21C37/08; B23K13/00; B23K13/08; G01B11/14; (IPC1-7): B23K13/00; B21C37/08; B23K13/08; G01B11/14
Domestic Patent References:
| JP5261564A | ||||
| JP577062A | ||||
| JP3264170A | ||||
| JP6188981A | ||||
| JP50122442A |
Attorney, Agent or Firm:
Hisao Fukami