Punching machine

Abstract

The invention provides a punching machine with a simple structure, which can make a punch head linearly advance along the vertical direction even when the punch head is inclined and prevent an advancing and retreating part of a ball screw mechanism elevating the punch head from corotating relative to a rotary part. The punching machine comprises a punch head supported by an elevation guide mechanism on a main body frame in a way to be elevated on the two ends, and a pair of ball screw mechanisms equipped respectively on the left and the right and independently making the two end parts of the punch head elevated. The elevation guide mechanism allows the inclination of the two ends of the punch head. A rotation-preventing inclination-allowing connecting mechanism is equipped to make the advancing and retreating part of the ball screw mechanism, the threaded shaft, connected with the punch head on the premise that the threaded shaft core is prevented from rotating relatively and the inclination of the punch head is allowed. A linear advancement guide mechanism is equipped between the main body frame and the punch head for limiting the left-to-right movement of the punch head.

Description

technical field [0001] The present invention relates to a press machine such as a plate bender that independently raises and lowers left and right side portions of a ram by using a pair of left and right ball screw mechanisms. Background technique [0002] Generally, in a plate bending machine, the indenter supporting the upper mold at the lower end is supported to move up and down freely, and the left and right sides of the indenter are driven up and down by a pair of left and right lifting drive mechanisms. The plate material is bent in cooperation with the lower dies installed in a fixed position below the upper die (for example, Patent Document 1). Depending on the type of bending process, the load acting on the indenter is unbalanced left and right, and the indenter is often formed by inclining left and right to compensate for this load imbalance. However, since the lifting guide mechanism for guiding the lifting and lowering of the pressure head is provided based on t...

AI Technical Summary

Problems solved by technology

[0004] Although there are cases where a mechanism that guides the indenter to advance in a straight line is provided in the conventional bending machine, the structure is complicated and the number of parts is large

In addition, although there are cases where a mechanism is provided to prevent co-rotation of the advancing and retreating parts of the ball screw mechanism, the reliability of preventing co-rotation with certainty is lacking.

In addition, in the case of adjusting the position of the indenter, it is necessary to adjust the mechanism for preventing the above-mentioned co-rotation, but this adjustment is difficult.

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