Last billet clamping mechanism of numerical control (NC) last making machine

Abstract

The invention relates to a last billet clamping mechanism of a numerical control (NC) last making machine. The last billet clamping mechanism comprises a clamping rotating arm, and is characterized in that the lower end of the clamping rotating arm is connected with a hydraulic cylinder, wherein, the axis line of the hydraulic cylinder and the length direction of the clamping rotating arm form a certain included angle; a reciprocating piston is arranged in the hydraulic cylinder; a clamping jaw is arranged on a lower end cover of the hydraulic cylinder; the two sides of the clamping jaw are equipped with a group of sliding blocks which can slide back and forth along the axis line of the clamping jaw; the lower end surface of the reciprocating piston is contacted with the sliding blocks through movable push rods inserted into the lower end cover of the hydraulic cylinder; return tension springs are sheathed outside the movable push rods; and the lower end oblique planes of the sliding blocks are matched with an oblique wedge at the circumferential side of the lower part of the clamping jaw so that the clamping jaw is forced to be gathered so as to clamp a cylinder opening on the upper end of the last billet. The last billet clamping mechanism has the advantages of reasonable design, compact structure and reliable operating performance, thus solving the defect that shoe last machining can not be completed once by clamping two ends of a last billet, and improving the machining efficiency.

Description

technical field [0001] The utility model relates to a last blank clamping mechanism of a numerically controlled last engraving machine, which is suitable for clamping various last blanks. Background technique [0002] At present, the last blank holding method adopted by the CNC engraving processing machine is as follows: figure 1 As shown, the last blank is clamped by the head top and tail top and driven by the head top to rotate, and the processing of the shoe last is completed under the action of the whirlwind knife. The main defect of this clamping method of the last blank is: the last blank is processed by the CNC engraving machine to obtain a semi-finished last, and the clamping parts of the two ends A and B of the shoe last must be manually cut off on the heel cutting machine. The final product can only be obtained through manual polishing. The removal and polishing of the clamping parts at both ends of the shoe tree requires high operational skills of the workers. Af...

AI Technical Summary

Problems solved by technology

[0003] The utility model provides a last blank clamping mechanism of a numerically controlled last engraving machine. The utility model has reasonable design, compact structure and reliable operation, solves the defect that the two ends of the last blank cannot be clamped to complete shoe last processing at one time, and improves the processing efficiency.

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