Special numerical-control grinding and milling machine for cams with arc-shaped surfaces

Abstract

A special numerical-control grinding and milling machine for cams with arc-shaped surfaces comprises a machine body, a crossbeam is arranged on the machine body along an X-direction, an X-direction slide plate is disposed at the front end of the crossbeam, a workpiece spindle box and a tailstock are oppositely arranged on the X-direction slide plate along the X-direction, a workpiece spindle is arranged in the workpiece spindle box, a Y-direction slide plate is disposed on one side, which is positioned on the X-direction slide plate, of the machine body along a Y-direction, a rotating table is arranged on the Y-direction slide plate, a cutter spindle box is arranged on the rotating table, and a cutter spindle is disposed in the cutter spindle box. When the special numerical-control grinding and milling machine is used, a grinding wheel or milling cutter mounted on the cutter spindle can rotate around the axis of the cutter spindle and simultaneously can swing around the central axis of the rotating table in a reciprocating manner along with rotation of the rotating table. Accordingly, the grinding wheel or milling cutter is equivalently used as a roller of a driven plate of a cam shaft with an arc-shaped surface. Simultaneously, the workpiece (the cam with the arc-shaped surface) is driven by the workpiece spindle to rotate in the process, and an inner groove of the cam with the arc-shaped surface can be continuously ground and milled only by means of rotation of the workpiece spindle and rotation of the rotating table during processing.

Description

technical field [0001] The invention relates to a numerically controlled machine tool for machining arc cams. Background technique [0002] The arc cam mechanism is a high-speed, high-precision indexing mechanism for space vertical axis transmission. It has good motion characteristics and dynamic characteristics, can obtain good positioning effect, wide indexing range, large load capacity, and can meet various complex motion control requirements through the selection of cam curves. However, since the contour surface is a helical surface that cannot be developed in space and has a complicated shape, it is difficult to process and manufacture. In particular, the space of the cam groove is small and the contour surface has meshing characteristics. In order to ensure the dimensional accuracy, it is very difficult to realize its machining. [0003] So far, the processing machine tools for arc cams have been transformed from other machine tools. Using these modified machine tool...

AI Technical Summary

Problems solved by technology

However, since its contour surface is a helical surface that cannot be developed in space, its shape is more complicated, so its processing and manufacturing is more difficult.

In particular, the small cam groove space and the meshing characteristics of the contour surface make it difficult to machine in order to ensure dimensional accuracy

[0003] So far, the processing machine tools for arc cams have been transformed from other machine tools. Using these modified machine tools to manufacture arc cams will inevitably lead to low machining accuracy and poor surface quality.

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