Title:
TOOL UNIT FOR SEQUENTIAL STRETCH FORMING AND SEQUENTIAL STRETCH FORMING MACHINE
Document Type and Number:
Japanese Patent JP3445988
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To carry out forming by the NC control of a shell shaped product with an intermediate swelled-out part by arranging the pivotaly supporting point of a parallelogram shaped link mechanism to a unit main body part and the ball end center of a ball end tool on the same line parallel with a parallel longitudinal link.
SOLUTION: Upper side and lower side tool heads are lowered and elevated, each ball end tool 14 is brought into contact with a stock to be formed, and the movement of the ball end tool 14 is controlled by an NC controller. While squeezing the stock, the stock is formed into a shell shape by the cooperation of the three ball end tools 14. In the intermediate swelled-out part, the fan-shaped tilting lever 5 of the tool unit for sequential stretch forming, is turned, the parallelogram shaped link mechanism is translated in parallel, for instance on a lateral side, and is operated so that the tool supporting shaft 13 of the ball end tool 14 does not butt the surroundings of the intermediate swelled-out part of the stock. At this time, the ball end center position of each ball end tool 14 is on the longitudinal center line of the corresponding upper side and the lower side tool heads, and the relative position of the upper and the lower tools 14 does not get out of order.
Inventors:
Hideo Iseki
Takuro Kamide
Naoki Shimoda
Takuro Kamide
Naoki Shimoda
Application Number:
JP35560596A
Publication Date:
September 16, 2003
Filing Date:
December 24, 1996
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
B21D22/28; B21D22/02; B21D22/06; B21D22/14; B21D22/18; B30B1/26; (IPC1-7): B21D22/02; B21D22/14; B30B1/26
Domestic Patent References:
| JP1085871A | ||||
| JP910855A | ||||
| JP910854A | ||||
| JP7132329A |
Attorney, Agent or Firm:
Somekawa Rikichi