Friction wedge type automatic clamp for cylindrical grinding and application method thereof

Abstract

The invention discloses a friction wedge type automatic clamp for cylindrical grinding and an application method thereof. The friction wedge type automatic clamp for cylindrical grinding comprises a connecting flange, a left end cover, a head rack tip, a positioning flange, an intermediate sleeve, a hexagonal nut, a spline inner sleeve, a supporting ring, a wedge ring, a shifting ring, wedges, a supporting ring positioning sleeve, a needle bearing and a right end cover, wherein the connecting flange is mounted onto a gear of a head rack through a screw; the connecting flange, the supporting ring and the shifting ring are sequentially fixed through the screws; the shifting ring is connected with three wedges through three uniformly-distributed shifting pins; the three wedges are correspondingly embedded into three bevel grooves of the wedge ring; the positioning flange is fixed to a machine body of the head rack and is fixedly connected with the intermediate sleeve; the spline inner sleeve is connected with the wedge ring; a pre-tensioned inner conical spring and a pre-tensioned outer conical spring are mounted between the intermediate sleeve and the spline inner sleeve. According to the friction wedge type automatic clamp for the cylindrical grinding, an automatic wedge clamping manner is used for replacing an existing general manual chuck and a hydraulic driving chuck, so that the structure is simplified, and meanwhile, the automatic clamping function is achieved; in addition, the grinding precision is ensured.

Description

technical field [0001] The invention relates to a wedge type cylindrical grinding machine fixture, in particular to a high-precision quick-change cylindrical grinding automatic fixture that can automatically clamp and loosen workpieces. Background technique [0002] As a high-precision processing technology, grinding has a very important influence on the processing quality and assembly accuracy of parts. In actual processing, the amount of labor consumed by cylindrical grinding and the possible accuracy have a lot to do with the clamping method and the centering accuracy of the fixture. At present, in the structure of the headstock of the cylindrical grinding machine, the clamping positioning and rotary motion of the workpiece mainly include: 1. Use the top of the headstock and the tailstock to tighten the workpiece, and then manually adjust the three jaws on the chuck to clamp the workpiece and drive The workpiece is rotated; 2. The top between the headstock and the tailst...

AI Technical Summary

Problems solved by technology

The first type requires manual adjustment of the chuck jaws to clamp the workpiece separately during clamping. The degree of automation is not high, and when the clamping force of the jaws is inconsistent, it is easy to clamp the workpiece, causing the rotation axis of the workpiece to not coincide with the centerline of the headstock spindle. It is bound to cause eccentric rotation of the workpiece during grinding, thus affecting the machining accuracy

The second method adopts the electromechanical hydraulic power method. While the automation degree of the machine tool fixture is improved, its cost is also increased accordingly.

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