Processing method for inclined lubricating oil grooves in inner ring

Abstract

The invention discloses a processing method for inclined lubricating oil grooves in an inner ring, and belongs to the technical field of machining. The processing method comprises the following steps of: 1) selecting a saw blade milling cutter with a diameter D smaller than a spherical diameter of a workpiece by about 2-3 mm, wherein the shape of a cutting edge of the saw blade milling cutter is the same with those of the oil grooves; (2) mounting the saw blade milling cutter on a numerical control milling machine; (3) manually tilting a universal indexing head, tilting a rotating shaft according to an included angle alpha of the lubricating oil grooves, and then, fixing the rotating shaft; (4) correcting and clamping a manual three-jaw chuck with a diameter being 250 mm on an indexing plate; (5) after clamping the workpiece, starting a numerical control processing program, quickly moving a main shaft of the numerical control milling machine in an x-axis direction, a y-axis direction and a z-axis direction till the center of the saw blade milling cutter coincides with the center of sphere of a to-be-processed workpiece; (6) enabling the saw blade milling cutter to enter an inner hole of the workpiece to mill out one lubricating oil groove; and (7) regulating the indexing plate, and performing rotary indexing according to a constant-angle opening of the indexing plate, clamping the workpiece, repeating steps (5) to (7) till all lubricating oil grooves are processed. The processing method realizes numerical control processing of the plurality of discontinuous inclined oil grooves, is high in efficiency and is low in cost. The processing method has very good economical benefits in production without special processing equipment or single-piece small-lot production.

Description

technical field [0001] The invention relates to a processing method for an inclined lubricating oil groove of an inner ring, which belongs to the technical field of machining. Background technique [0002] Generally, when processing a linear oil tank, you only need to install the hooking knife directly on the tool holder on the lathe, adjust the depth through the middle carriage, and then drag the large carriage back and forth by hand. In this way, the linear oil groove is finished. However, with the continuous development of machinery manufacturing and the harsh requirements of the working environment of parts, in order to improve the lubrication effect, some construction machinery shaft sleeves design the oil grooves as inclined intermittent oil grooves or X-shaped cross oil grooves instead of 8-shaped cross oil grooves. [0003] Inner ring (eg figure 1 ) is the lower intersection point of the active landing gear of a certain type of aircraft. When the main landing gear ...

AI Technical Summary

Problems solved by technology

In addition to two annular oil grooves on the inner and outer surfaces of the part, there are also three discontinuous oblique oil grooves distributed on the inner hole. This design can effectively ensure the sufficient lubrication of the shaft in the hole, but this structure is different from the common 8-shaped intersection. Compared with the oil groove, it cannot be processed on a lathe, which brings great difficulty to the manufacture of parts

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