JPH0447826U

JPH0447826U -

Info

Publication number: JPH0447826U
Application number: JP9201090U
Authority: JP
Priority date: 1990-08-31
Filing date: 1990-08-31
Publication date: 1992-04-23

Description

[Brief explanation of the drawing]

第１図は本考案のパンチの下死点位置補正装置
が装備されたプレス機械を示す縦断面図である。
第２図は第１図のピストンシリンダ機構およびそ
の近傍を示す縦断面図である。第３図は第１図の
ピストンシリンダ機構に圧油を供給排出するため
の回路図である。第４図は圧油室内の油圧とパン
チの下死点位置の変位との関係を示すグラフであ
る。第５図はパンチの下死点時におけるシリンダ
に対するピストン部の変位を示す縦断面図である
。主要な部分の符号の説明、１１……スライド、
１３……ボルスタ、２１……上プレート、２３…
…上型、２５……上型支持部材、２９……下型、
３１……下型支持部材、３３……パンチ、３４…
…ダイス、３５……ピストンシリンダ機構、３７
……シリンダ、３９……ピストン部。 FIG. 1 is a longitudinal sectional view showing a press machine equipped with a punch bottom dead center position correction device of the present invention.
FIG. 2 is a longitudinal sectional view showing the piston cylinder mechanism of FIG. 1 and its vicinity. FIG. 3 is a circuit diagram for supplying and discharging pressure oil to the piston cylinder mechanism of FIG. 1. FIG. 4 is a graph showing the relationship between the oil pressure in the pressure oil chamber and the displacement of the bottom dead center position of the punch. FIG. 5 is a longitudinal sectional view showing the displacement of the piston portion with respect to the cylinder at the bottom dead center of the punch. Explanation of symbols of main parts, 11...slides,
13... Bolster, 21... Upper plate, 23...
...Upper mold, 25...Upper mold support member, 29...Lower mold,
31... lower mold support member, 33... punch, 34...
...Dice, 35...Piston cylinder mechanism, 37
...Cylinder, 39...Piston part.

Claims

[Claims for Utility Model Registration] (1) An upper mold in which a cylinder of a piston-cylinder mechanism is provided on the lower surface of a slide of a press machine, and an upper mold is supported at the lower part of an upper plate disposed on the lower surface of the slide. A support member is arranged to be movable up and down, a piston portion housed in a cylinder of the slide is brought into contact with the upper mold support member, and the oil pressure in a pressure oil chamber in the cylinder is changed to cause the punch to move against the slide. A bottom dead center position correcting device for a punch, which corrects a bottom dead center position. (2) A cylinder of a piston-cylinder mechanism is provided on the upper surface of the bolster of the press machine, and a lower mold support member, on which the lower mold is supported, is arranged on the lower plate arranged on the upper surface of the bolster so as to be movable up and down. Then, a piston portion accommodated in the cylinder of the bolster is brought into contact with the lower mold support member, and the hydraulic pressure in the pressure oil chamber in the cylinder is changed to change the height of the die with respect to the bolster, and the height of the die relative to the bolster is changed. A punch bottom dead center position correcting device, which corrects the bottom dead center position of a punch. (3) The punch bottom dead center position correcting device according to claim 1 or 2, wherein the oil pressure in the pressure oil chamber in the cylinder is controlled so as to approach the set value when it is different from the set value.