cutting device

Abstract

The present invention provides a cutting device that eliminates bouncing of a bar during cutting and facilitates replacement of a fixed knife or a pressing member and cleaning around the fixed knife or the pressing member. The pressing member-side inclined surface of the pressing member is pressed down by the clamping block-side inclined surface of the clamping block, and the bar is pressed and clamped by the pressing portion of the pressing bush. The inclination angle of the clamp block-side inclined surface and the pressing member-side inclined surface is formed at 6 degrees. The inclination angle is formed at such an angle that the component force of the pressing is smaller than the maximum frictional force between the inclined surface on the pressing member side and the inclined surface on the clamping block side. Even if the member is pressed, the clamping block and the piston rod will not return to the left (non-clamping direction). The bouncing of the bar during cutting is eliminated, the cutting accuracy is improved, and a stable billet can be produced.

Description

technical field [0001] The present invention relates to a cutting device that presses a rod to cut. More specifically, it relates to a cutting device provided as a cutting device for cutting a billet for forging of a predetermined length from a bar and cutting the bar by shearing, and The bar material sent out to the stationary knife of the cutting device is pressed to cut. Background technique [0002] When producing a forged product or the like as a metal part, first, it is necessary to cut and take out a required length called a billet from a bar material which is the raw material thereof. In the case of a forged product, the billet is put into a press mold at room temperature with heating in a heating furnace or without heating in a subsequent processing step to be plastically processed into a desired shape. . Typically, after such a forging step, a machining step or the like is performed to produce the final part. Therefore, if the quality of the billet is poor, it ...

AI Technical Summary

Problems solved by technology

Therefore, if a large upward reaction force acts on the pressing member from the bar when cutting the bar, the bar will resist the pressing force of the hydraulic cylinder and swing slightly with the fulcrum as the fulcrum, so the bar will bounce slightly, Concerns about adverse effects on bar cutting accuracy

In addition, since the lever covers the fixed knife or the pressing member from above, it is difficult to replace the fixed knife or the pressing member, and cleaning around the fixed knife or the pressing member takes time.

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