Positioning and clamping device for inner hole grinding

Abstract

The invention provides a positioning and clamping device for inner hole grinding. The device comprises a fixing base fixedly connected with a main shaft and a clamping structure for clamping a workpiece. The clamping structure comprises two or more ejector rods which jack the peripheral face of the workpiece in the radial direction so as to clamp the workpiece. The positioning and clamping device for inner hole grinding further comprises tension springs used for providing tension for the workpiece so as to tightly press the workpiece to the centre of the main shaft, wherein one end of each tension spring is connected with the fixing base, the other end of each tension spring is hooked to the corresponding ejector rod, and the tension springs are perpendicular to the ejector rods. According to the positioning and clamping device for inner hole grinding, the tension springs directly pull the fixing base and the ejector rods used for clamping the workpiece, the springs are perpendicular to the ejector rods so that the elastic acting force of the springs can keep parallel with the axis of the workpiece all the time, in this way, the structure of the whole device is greatly simplified, and the manufacturing and assembly difficulty is lowered. Because the elastic force of the springs keeps parallel with the axis of the workpiece, an accurate stress direction of the workpiece is ensured, deflection torque is avoided, and workpiece grinding precision is high.

Description

technical field [0001] The invention relates to a positioning and clamping device for inner hole grinding. Background technique [0002] When grinding the inner hole of rigid shaft parts, the chuck is generally used to clamp one end of the shaft, and the other end of the center frame supports the shaft to align and then grinds the inner hole, or two center frames are used to support the two ends of the shaft respectively, and the center frame is used to align the other end of the shaft. Grinding the inner hole afterward, but both methods have certain problems. The first method is affected by the accuracy of the machine tool chuck itself and the accuracy of the chuck clamping surface, so it is difficult to guarantee the grinding accuracy of the inner hole. When the two methods are used, the shaft parts will move axially, and the center frame close to the head frame is often subjected to torque force, which also has a certain impact on the grinding of the inner hole. [0003]...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an inner hole grinding positioning clamping device that directly provides a pressing force for the workpiece to be pressed on the tip through a spring, so as to solve the complex structure of the positioning clamping device in the prior art, which affects the inner hole. grinding problem

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