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Method for remedying water-eroded defects on surface of engine cylinder block

An engine cylinder and repair method technology, which is applied in the field of engine cylinder block remanufacturing, can solve problems such as unreliable repair methods, difficulty in realizing engine cylinder block remanufacturing, etc., achieve shape and precision recovery, good bonding strength, and restore original performance Effect

Active Publication Date: 2013-07-10
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for repairing water erosion defects on the surface of engine cylinder block blanks, so as to solve the unreliable repair method for existing water erosion defects on the surface of engine cylinder block blanks, which makes it difficult to realize the repair of engine cylinders with water erosion defects. Technical issues of body remanufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Repair the water erosion defect of the water jacket plugging hole of the engine cylinder block. The water jacket plugging hole is the blank surface on the engine cylinder block. The corresponding defect repair process of other blank surfaces is the same, which includes the following steps:

[0032] (1) According to the shape of the defective part, use a steel wire wheel to grind the surface of the defective part, remove the surface oxide layer, oil stains and other factors that are not conducive to the combination of the welding material and the cylinder body in the subsequent welding process, and expose the cylinder body ;

[0033] (2) Grind the sharp corners or edges on the cylinder body with a steel wire wheel, so that the sharp corners or edges on the cylinder body can achieve a smooth transition, and avoid poor bonding in the subsequent welding process;

[0034] (3) Apply alcohol to the defective part after grinding and ignite it to remove the oil immersed in the c...

Embodiment 2

[0040] Repair the water erosion defect of the water jacket plugging hole of the engine cylinder block. The water jacket plugging hole is the blank surface on the engine cylinder block. The corresponding defect repair process of other blank surfaces is the same, which includes the following steps:

[0041] (1) According to the shape of the defective part, use a pneumatic grinding wheel dresser to grind the surface of the defective part, remove the surface oxide layer, oil stains and other factors that are not conducive to the combination of the welding material and the cylinder body in the subsequent welding process, and expose the defective part. Cylinder block body;

[0042] (2) Use a pneumatic grinding wheel dresser to grind the sharp corners or edges on the cylinder body, so that the sharp corners or edges on the cylinder body can achieve a smooth transition, and avoid poor bonding in the subsequent welding process;

[0043] (3) Apply alcohol to the defective part after gri...

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Abstract

The invention discloses a method for remedying water-eroded defects on the surface of an engine cylinder block and belongs to the technical field of engine cylinder refabrication. The method includes: polishing the defective surface to expose a cylinder block body; polishing sharp corners or edges of the cylinder block body; removing oil at defective positions; re-polishing; cleaning the defective positions; remedying the defective positions by electric spark ionic microwelding to make the welded positions higher than the surface of the cylinder block; and polishing the welded positions to make the welded positions level to the surface of the cylinder block. The method effectively guarantees fine bonding of welding material and the cylinder block body during welding. The cylinder block body is not heated, deformed or undercut, and the welding material is metallurgically combined with the cylinder block body under fine intensity. The shape and precision of the defective positions are restored fully, original properties of a workpiece are restored, and the water-eroded defects on the surface of the engine cylinder block are remedied.

Description

technical field [0001] The invention belongs to the technical field of engine cylinder block remanufacturing, and in particular relates to a method for repairing water erosion defects on the surface of an engine cylinder block blank. Background technique [0002] Remanufacturing is an industry that implements high-tech repair and transformation of waste products. It is aimed at damaged or about to be scrapped parts. On the basis of performance failure analysis, life evaluation and other analysis, remanufacturing engineering design is carried out. Technology to restore the shape and precision of the workpiece, so that the quality of remanufactured products can reach or exceed that of new products. [0003] Engine cylinder block water erosion is a common defect in the old engine cylinder block, and it generally exists on the upper plane of the engine cylinder block, the corresponding position of the plugging hole of the water jacket cavity, and other surfaces in contact with w...

Claims

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Application Information

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IPC IPC(8): B23P6/02
Inventor 王圣斌韩继胜张兰春丁韬杨生明牟海堂
Owner WEICHAI POWER CO LTD
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