Machining method of two-half type bearing bush

Abstract

The invention discloses a machining method of a two-half type bearing bush. The machining method comprises the following steps that S1, a plurality of welding grooves distributed in the axial direction of the bearing bush at intervals are milled in the positions, close to the outer circle, of the split faces of two bearing bush blanks; S2, the two bearing bush blanks are fixed through welding grooves to form an annular combined part; S3, the combined part is axially and horizontally leveled through an alignment assembly and then horizontally leveled in the radial direction, then an inner hole or an outer circle is aligned, and then the inner hole, the outer circle and the end face of the combined part are roughly turned; S4, alloy is poured on the surface of the inner hole of the combined part; S5, the alignment assembly is used for performing axial horizontal leveling on the combined part, then radial horizontal leveling is carried out, then an inner hole or an outer circle is aligned, and then the inner hole, the outer circle and the end face of the combined part are subjected to finish turning; S6, the outer circle of the combined part is ground, and the inner hole of the combined part is finely bored; and S7, the combined part is separated to obtain two bearing bushes, and the split surfaces of the two bearing bushes are subjected to finish milling. The requirements for symmetry and perpendicularity in the bearing bush machining process can be met, and the machining quality of the bearing bush is guaranteed.

Description

technical field [0001] The invention relates to a bearing bush of a low-speed machine, in particular to a processing method of a two-half bearing bush. Background technique [0002] The low-speed engine bearing bush is a key part inside a large diesel engine. The inner hole is cast with alloy material, and its shape is a semicircular structure, and it is a thin-walled part. The bearing bushes have free spring force and the protrusion of the middle split surface, and are pressed tightly in the bearing seat hole by a certain pressure. In the manufacturing process, two and a half tiles are combined and processed in pairs. If the diameter of the outer circle is set too large, the free spring force will easily exceed the tolerance after separation, which cannot meet the requirements. The amount is insufficient, so in order to meet the free elastic potential requirements of the bearing pad to the greatest extent, the diameter of the outer circle is usually determined according to...

AI Technical Summary

Problems solved by technology

In this way, the total allowance on one side of the middle parting surface of the half tile is usually about 1~1.5mm, and eccentricity and inclination of the middle parting surface are prone to occur during the processing process, resulting in the fact that the middle parting surface of the bearing bush cannot be completely processed, or even In the same sub-bearing, half of the bearing bushes have too much allowance for the mid-section surface, while the other half of the bearing bush has no machining allowance for the mid-section surface, which will easily lead to waste products

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