A method for repairing parts by mixing tungsten carbide particles and resin

Abstract

The invention discloses a method for repairing components by mixing tungsten carbide particles and resin. Including the following steps: (1) Pretreatment: Use a hand electric drill or a grinder to clean the worn part of the part, remove the fatigue layer on the worn surface and the matrix metal in the vicinity of about 2mm, process it into a groove, and then remove the oil with a cleaning machine; (2 ) Coating the bottom layer: preheat the part to be repaired first, then apply resin glue in the groove of the part to be repaired and roll it evenly repeatedly, discharge the residual air in the repaired layer, and then cure; (3) Coating the surface layer: Apply a certain proportion of the mixture of tungsten carbide particles and resin evenly on the base layer to form a cover layer, and repeatedly roll it to make it fully bonded with the base layer and adjacent metals, exhaust residual air, and then cure; (4) surface processing : Use grinder, file or polishing method to process the cover layer to restore the size and performance of the part. The invention avoids welding, adopts cold working method, and has good repairing effect.

Description

Technical field [0001] This method is applicable to the repair and re -manufacturing of the wear of the steel parts. Background technique [0002] In the process of serving in construction machinery products for a long time, some parts of parts wear, such as the scratching of the oil cylinder piston rod, the wear of the oil pump diagonal disk, the drive shaft at the oil seal, etc.Normally work, the product cannot run in severe cases, and the wear parts need to be replaced or fixed.my country's construction machinery products market has a huge amount of markets. The proportion of products that have entered the retirement period are large. Some of its components need to be damaged and damaged. [0003] In order to reduce the cost, the damaged and damaged parts are usually repaired before using it. Generally, pile welding methods are used for repair. However, some problems are often encountered during pile welding repair.Carbon steel or alloy steel has poor welding properties and un...

AI Technical Summary

Problems solved by technology

[0003]In order to reduce the cost, the worn and damaged parts are usually repaired and then reused. Generally, surfacing welding is used for repairing. However, some problems are often encountered during surfacing welding repairs, such as The weldability of the base material is poor, and the worn parts are generally medium carbon steel or alloy steel with surface heat treatment, which has poor weldability and unstable welding quality; it may also be welding deformation, and the left and right parts may be out of axis and asymmetrical after surfacing , side bay, difficult processing and other phenomena, these problems will make repair difficult or fail to meet the use requirements after repair

In addition, smaller workpieces and delicate parts are not suitable for surfacing repair

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