Swing-type eccentric inner circle linkage grinding method

Abstract

The invention relates to a swing-type eccentric inner circle linkage grinding method. According to the method, a workpiece rotating mechanism drives a workpiece to swing around a C axis, a grinding tool feeding mechanism drives a grinding tool to reciprocate in an eccentric inner circle hole in the X-axis direction while the workpiece swings, so that a grinding track, relative to the workpiece, ofthe grinding tool is an inner circle grinding track of a corresponding eccentric inner circle, and the process is conducted until the required eccentric inner circle is ground; within one period whenthe workpiece swings around the C axis, the grinding tool preferably grinds an inner circle hole for one circle in the eccentric inner circle hole in the same circumferential movement direction, preferably, a torque motor is adopted for driving the workpiece rotating mechanism, an angle grating ruler used for collecting real-time rotation angle data is arranged, a linear motor is adopted for driving the grinding tool feeding mechanism, and preferably, a hydrostatic guideway is adopted as a guideway of the grinding tool feeding mechanism. According to the machining method, there is no need todesign or prepare an eccentric clamp special for the eccentric inner circle, time consumed for machining is short, the efficiency is high, the occupied amount of a grinding machine is small, and improvement of the machining precision of the workpiece is facilitated.

Description

technical field [0001] The invention relates to a swing-type eccentric inner circle linkage grinding method, which belongs to the technical field of mechanical processing. Background technique [0002] There are usually multiple eccentric inner circles on the eccentric inner circle workpiece. For example, the planet carrier of the RV reducer has 3 eccentric inner circles. Under the existing technology, the way of grinding the inner circle is to use the workpiece rotation mechanism (such as the headstock and Chuck, etc.) drives the workpiece to rotate around the center of the inner circle (central axis) to be processed, and at the same time, the abrasive tool feeding mechanism (such as a worktable and grinding wheel frame, etc.) drives the abrasive tool in the eccentric inner hole (which can be pre-processed and also Grinding) moves along the radial direction of the inner circle (which can be called the X-axis direction), and can move axially according to the process requirem...

AI Technical Summary

Problems solved by technology

This grinding method of eccentric inner circle has obvious defects: due to the need to prepare a set of special eccentric fixtures for each eccentric inner circle, resulting in higher tooling costs; based on the convenience of operation, a set of eccentric fixtures Installed on a grinding machine, each eccentric inner circle must be equipped with a grinding machine with corresponding eccentric fixtures. The investment in the equipment is large, the floor area is large, and the investment in the workshop is high; because the workpiece needs to be installed many times during the processing Clamp positioning, there are multiple positioning errors; when processing different types of workpieces, the eccentric chuck needs to be replaced; when the workpiece is updated and upgraded, the eccentric clamp needs to be redesigned and manufactured, which is expensive and takes a lot of machine tool adjustment time; in addition, the special card The accuracy limitation of the tool itself also affects the machining accuracy of the workpiece

As a result, the processing accuracy of the product is low, the processing efficiency is low, and the auxiliary time is long, and the investment in equipment and space is large.

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