Grinding method for outer circles and conical surface of precise composite grinding couplings and grinding machine tool

Abstract

The invention relates to a grinding method for outer circles and conical surface of precise composite grinding couplings and a grinding machine tool. The grinding method comprises the following steps:outer circles of flat ends of workpieces are clamped by using a fixture mounted on a head frame; the end surfaces of the flat ends of the workpieces butt against an axial positioning rod on the headframe; conical ends of the workpieces butt against a half female tip on a tail frame; conical surfaces to be grinded of the workpieces are locally exposed from a gap of the half female tip; the conical surfaces to be grinded and outer circles to be grinded of the workpieces are grinded in sequence; when the conical surfaces to be grinded are grinded, the fixture drives the workpieces to rotate; and a conical surface grinding wheel is contacted with the conical surfaces to be grinded through the gap of the half female tip. A machine body of the grinding machine tool is provided with the head frame, the tail frame and a grinding wheel frame; the tail frame is provided with the half female tip; the grinding wheel frame is provided with the conical surface grinding wheel and an outer circle grinding wheel; and the grinding wheel frame is provided with a B shaft for driving revolving of the grinding wheel frame. The grinding method adapts to high-precision mechanical grinding of electric control high-pressure common rail system oil injection nozzle couplings and other similar workpiece outer circles and conical surfaces.

Description

technical field [0001] The invention relates to a grinding method for precise compound grinding of the outer circle and the conical surface of a pair, and also relates to a grinding machine adopting or adapting to the grinding method, which belongs to the technical field of mechanical processing. Background technique [0002] At present, when grinding needle valve workpieces at home and abroad, most of the workpieces are clamped by the grinding method. A machine tool or only grinds the conical surface (mostly using the grinding method); or only grinds the outer circle of the workpiece, or realizes it by replacing the device. The grinding of the outer circle and the conical surface cannot ensure that the outer circle and the conical surface of the workpiece can be ground at the same time by one clamping on a machine tool, which not only increases the process workload and prolongs the production cycle, but also due to multiple installations Clamping error affects machining acc...

AI Technical Summary

Problems solved by technology

For example, the grinding parts of the fuel injector assembly include two surfaces: the outer cylindrical surface (φ4mm cylindrical surface) and the conical surface (60° conical surface). After grinding, the surface roughness and roundness requirements are high, and the axial The position requirements are high, because the flat end of the workpiece has no center hole, and the tapered end is a grinding surface, the top grinding method of the head and tail frame cannot be used. At the same time, due to the small diameter of the workpiece, if the tail stock is cancelled, only the head frame is used to clamp it. Grinding, it is difficult to ensure the grinding accuracy, therefore, there is no effective mechanical grinding technology suitable for the grinding of the outer circle and conical surface of this pair of parts

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