Method and device for position exact and dimension exact chamfer

Details Method and device for position exact and dimension exact chamfer Method and device for position exact and dimension exact chamfer

1997-05-16

2000-08-29

Tsai, Henry W. H.

Turning

Severing or cut-off

Automatic and/or triggered control

82 702, 82118, 82113, 82134, B23B 516

Patent

active

061091510

ABSTRACT:
In a method for machining a chamfer at a pipe end, clamped in a radial clamping device, to exact positional and dimensional tolerances as a function of a measured course of an inner and an outer diameter of the pipe, an actual position of the pipe end clamped in the radial clamping device is determined with a first sensing device. Based on the determined actual position, in a controlled manner a machining tool is quickly advanced to the pipe end. With a second sensing device at least one of the actual inner diameter of the pipe and the actual outer diameter of the pipe is determined, and optionally the course of one of the actual inner diameter and the actual outer diameter about the circumference of the pipe is also determined. The machining tool is adjusted based on one of the actual inner diameter, the actual outer diameter, the nominal inner diameter and the nominal outer diameter. The chamfer is rough-machined with a great advancing rate with the adjusted machining tool to a state in which a machining allowance for a subsequent finish-machining step is provided. The chamfer is then finish-machined with minimal advancing rate to the exact positional and dimensional tolerances as a function of the course of one of the inner diameter and the outer diameter.

REFERENCES:
patent: 3891835 (1975-06-01), Shoda et al.
patent: 4203691 (1980-05-01), Nishimura et al.
patent: 4324049 (1982-04-01), Blose
patent: 4774753 (1988-10-01), Holy et al.
patent: 4840096 (1989-06-01), Martin et al.
patent: 4860499 (1989-08-01), Dinger et al.
patent: 5197361 (1993-03-01), Carrier et al.

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