Method for repairing abrasion of guide rail of machine tool body

Abstract

The invention discloses a method for repairing abrasion of a guide rail of a machine tool body. The method comprises the following steps that S1, oil stains in concave pit points and deep and long grooves of the guide rail are removed; S2, the concave pit points are repaired, specifically, multiple layers of metal powder are brushed and plated in the concave pit points to be repaired, after each layer of metal powder is brushed and plated, the concave pit points are heated to a certain temperature through a metal powder spray welding gun and then cooled, and the concave pit points are repaired point by point till the concave pit points are filled and leveled up; S3, the deep and long grooves are repaired, specifically, the deep and long grooves are divided into multiple sections, multiple layers of metal powder are brushed and plated in the deep and long groove sections to be repaired, after each layer of metal powder is brushed and plated, the deep and long groove sections are heated to a certain temperature through the metal powder spray welding gun and then cooled, and the deep and long groove sections are repaired section by section till the whole deep and long groove sections are filled and leveled up; S4, after the concave pit points and the deep and long grooves are filled, after complete cooling is conducted, the guide rail of the machine tool body deforms and recovers to an original shape, and a spray welding position is polished and flattened; and S5, the hardness of the repaired guide rail of the machine tool body is measured. The process equipment is simple, operation is convenient, and the repairing effect is good.

Description

technical field [0001] The invention relates to the field of production and manufacturing, in particular to a method for repairing the wear of a guide rail of a machine tool bed. Background technique [0002] The rails of the carriage bed of the C36# lathe are seriously worn, and the deepest part reaches 0.45mm. The machine tool frequently appears "contour monitoring alarm", and the X-axis is stuck during processing. turning. This machine tool pallet bed rail must be completely repaired before it can be used. Since the bed guide rail material is HT250 gray cast iron, the cast iron material is relatively loose and has many micropores. After long-term use, the lubricating oil has penetrated into its matrix, which needs to be fully removed, and the repaired working surface requires high strength. Due to the long-term reciprocating motion, the guide rail surface must have sufficient wear resistance, otherwise it will affect the accuracy and service life of the machine tool. F...

AI Technical Summary

Problems solved by technology

But there is a defect in this approach: long construction period and high cost