A Pneumatic Shock Low Stress Blanking Device

Abstract

The invention discloses a pneumatic impact low-stress blanking device and belongs to the technical field of intelligent manufacturing. The pneumatic impact low-stress blanking device comprises a rack,a sleeve support fixed to the rack, impact cylinders fixed to the sleeve support and a support end cover. The sleeve support comprises a pedestal and a support barrel, and the support end cover is fixed to the end of the support barrel. A sleeve is installed in an inner cavity of the support barrel. Impact hammers are fixed to the ends of piston rods of the corresponding impact cylinders. Throughholes used for allowing the impact hammers to pass through are formed in the side wall of the support barrel. The sleeve is installed in the inner cavity of the support barrel under the supporting action of springs. The sleeve is used as a force arm compensation device, a bar loading force arm of the blanking device is prolonged, force arms borne by short bars can be extended, and the effect thatthe tip ends of V-shaped grooves of the short bars can obtain large stresses is guaranteed; and moreover, evenness of the circumferential stressing condition of the bars can be ensured, axial and radial positioning precision of the bars is guaranteed, and the blanking fracture surface quality is good.

Description

technical field [0001] The invention relates to the technical field of intelligent manufacturing, in particular to a pneumatic impact low-stress blanking device. Background technique [0002] Low-stress blanking is to apply crack technology to bar blanking. First, a circumferential crack is artificially prefabricated on the surface of the bar, and then a certain external force is applied to the bar with a circumferential surface crack, so that it can be cut at a low stress. Dynamic separation in the form of stress brittle fracture. Low-stress bending fracture blanking is recognized as the most promising precision blanking method in the future. It makes full use of the notch effect and bending effect of the circumferential V-shaped groove to achieve brittle fracture of materials at low stress levels and obtain geometry-free Distortion, vertical flat fracture, blank without chamfering. At present, scholars have conducted some research on low-stress bending blanking technolog...

AI Technical Summary

Problems solved by technology

[0004] The existing low-stress blanking machine can solve part of the problem of long-bar blanking, but for the last few sections of short-bar or long-bar, due to the short length, the loading force generated by the clamping device for low-stress blanking The arm is too short, it is not easy to clamp, and the bending moment generated by the loading force at the tip of the V-shaped groove of the bar is small, resulting in a limited range of the length of the bar when the blanking machine is working, and a large blanking force is required , The material waste of the bar or the quality of the bar section is not good

Therefore, it is urgent to solve the problem that the clamping arm of the short bar or the last few sections of the long bar is too short

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