Workpiece straightening machine

Abstract

The invention discloses a workpiece straightening machine. The workpiece straightening machine is used for straightening bending and deformation of slender shafts, and comprises a universal oil press,a straightening special pressing head, a straightening special fixture and a pressing head travel limiting device. The straightening special pressing head is fixedly connected to the outer end of a piston rod of the oil press. The straightening special fixture comprises a fixture support, a rocker arm, an upper positioning block, a lower positioning block, a connecting rod, an air cylinder and apneumatic control device. According to the workpiece straightening machine, a needed hand wheel rotation angle can be looked up from a "workpiece tortuosity-anti-bending deformation-hand wheel rotation angle" form which is concluded from previous straightening practices according to the measured bending deformation of a to-be-straightened workpiece, the hand wheel is adjusted manually to the corresponding rotation angle, the oil press is started to press downwards, and then the straightening work can be completed. The operation process is manually digitalized, the working efficiency and the straightening precision are improved, and the rejection rate is decreased and the experience requirement for an operator is lowered.

Description

technical field [0001] The invention relates to a straightening device for bending and deforming a workpiece, in particular to a straightening device and a straightening method for bending and deforming a circular shaft-type slender workpiece after rough machining by heat treatment. Background technique [0002] The slender shaft is prone to bending deformation, especially after heat treatment, it often produces large deformation due to the change of internal stress, and this bending deformation can even reach several millimeters. If such a large bending deformation is not straightened, in the subsequent machining, the workpiece will be eccentric or one side will be overcut and the other side will be left with gray skin, resulting in the scrapping of the parts. Therefore, such workpieces often need to be straightened before subsequent processing. [0003] At present, most of the straightening methods for slender shaft parts are manual reverse bending straightening. The pro...

AI Technical Summary

Problems solved by technology

The problem with manual straightening is that the hydraulic press control valve or electrical switch is manually operated to control the pressure head of the hydraulic press, and the downward stroke depends entirely on the operator's experience and on-the-spot reaction.

If the pressure range is too large during operation, the parts may be scrapped. If the pressure range is insufficient, the alignment will be insufficient. It often requires repeated operations to meet the requirements.

Therefore, the work efficiency is low, the quality is not easy to control, the operator is highly nervous, and the overall effect is not good.

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