Punching machine

Abstract

PROBLEM TO BE SOLVED: To provide a press machine which can make a ram move straight vertically even when the ram is inclined right or left, and can prevent an advance and retract component of a ball screw mechanism for making the ram move up and down from co-rotating with regard to a rotating component, while being a simple structure.SOLUTION: The press machine includes a ram 6 supported at the right and left both ends to the body frame 1 so as to be capable of moving up and down through an elevating guide mechanism 7A, and a right and left pair of ball screw mechanisms 11 which makes the right and left both ends of the ram 6 move up and down individually. The elevating guide mechanism 7A allows right and left inclination of the ram 6. A rotation prevention / inclination allowance connecting mechanism 19 is provided, which connects a screw shaft 12 and the ram 6 which are the advance and retract component of the ball screw mechanism 11, in the state that the relative rotation of the screw shaft 12 around the axis is prevented, and in the state that the right and left inclination of the ram 6 is allowed. Between the body frame 1 and the ram 6, a straight movement guide mechanism 48 which regulates the right and left movement of the ram 6 is provided.

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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