JPH09141511A
1995-11-22
Outside excess weld metal cutting device for spiral pipe
JPH0782746A
1993-09-16
Mounting method of chucking plate
JPH06154848A
1992-11-18
Spiral tube-forming device
JPH04251672A
1990-12-25
Method for welding without tab
JPH0463601A
1990-06-29
Pipe end cutting method
JPH0335880A
1989-07-03
Automatic welding method
JPS6071146A
1983-09-29
Automatic facing device for pipe end of spiral steel pipe and automatic length measuring device
JPS6061178A
1983-09-14
Rotative welding device for attaching bent pipe
JPS6021179A
1983-07-14
Plasma cutting method of spiral welded pipe
JPS59110476A
1982-12-16
Method for controlling automatically position of inside surface welding head for spiral pipe making machine
JPS5987074A
1982-11-06
Plastic lining method for steel pipe
JPS5847565A
1981-09-14
Preventing method for sticking of hot cutting slag
JPS53131956A
1977-04-23
Prebending process of steel band on occasion of spiral steel pipe making
JPS53100948A
1977-02-15
Method and apparatus for preventing severed spatter adhesive of spiral steel tube
JPS52143574A
1976-05-24
Method of cutting and working cylindrical steel tube at right angle to tubular axis
JPS5261157A
1975-11-15
Method to manufacture spiral steel tubes
JPS51147456A
1975-06-12
Spiral pipe strip positioning method
