Title:
METHOD AND DEVICE FOR PLASTICALLY WORKING TIP PART OF METALLIC TUBE IN CONICAL SHAPE
Document Type and Number:
Japanese Patent JP2548655
Kind Code:
B2
Abstract:
PURPOSE: To work a metallic tube with small pressure by rotating a roller having a prescribed angle to the center line of the metallic tube in press-contact with the outer circumference of the metallic tube and working this end part in the conical shape.
CONSTITUTION: In this manufacturing method, a roller 3 having a pre scribed angle to the center line of the metallic tube is rotated under press-contact with the circumference part of the metallic tube and this end part is worked in a conical shape. In this device, three or more rolls 3 are installed rotatably at an equal interval on the inside of a hollow conical working frame 2, the working frame 2 is fixed or supported rotatably and the tip part of the metallic tube 1 connecting a drive means is worked plastically in the conical shape. Consequently, the metallic tube can be worked with pressure smaller than that required when the metallic tube is formed in press contact with a usual hole die, the metallic tube is prevented from deformation and a large press-in device and large power are not required.
Inventors:
YOSHIDA KEIICHIRO
Application Number:
JP35233991A
Publication Date:
October 30, 1996
Filing Date:
December 13, 1991
Export Citation:
Assignee:
YOSHIDA KEIICHIRO
International Classes:
B21D41/04; (IPC1-7): B21D41/04
Domestic Patent References:
| JP5399066A | ||||
| JP5469138U | ||||
| JP54115593U | ||||
| JP5470933U |
Attorney, Agent or Firm:
Suzuki Seiji