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Casting gap repair method

A technology for castings and gaps, which is applied to casting equipment, metal processing equipment, manufacturing tools, etc., and can solve problems such as deep holes and tiny pores that cannot be repaired

Active Publication Date: 2015-09-30
遵义金业机械铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing method for repairing pores in castings has the defect of being unable to repair deep pores and tiny pores.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for repairing gaps in castings of the present invention comprises the following steps:

[0017] The first step, the preparation stage, puts the casting to be repaired into a sealed device that can be vacuumed;

[0018] The second step is to vacuumize the airtight equipment to -0.08MP;

[0019] The third step is to inject water-soluble sodium silicate as a repair solution and diffuse in the equipment for at least 30 minutes;

[0020] The fourth step, under the action of the booster pump, pressurize until the sealed equipment presses out the repair fluid;

[0021] The fifth step is to repeatedly flush the casting by increasing and decreasing the pressure of the airtight device, sucking in and pressing out the water in the airtight device;

[0022] The sixth step is repairing, vacuuming again, and then introducing carbon dioxide gas to react with the repairing fluid penetrating into the casting to finally generate silicon dioxide to complete the repair.

Embodiment 2

[0024] A method for repairing gaps in castings of the present invention comprises the following steps:

[0025] The first step, the preparation stage, puts the casting to be repaired into a sealed device that can be vacuumed;

[0026] The second step is to evacuate the airtight equipment to -0.09MP;

[0027] The third step is to inject water-soluble sodium silicate as a repair solution and diffuse in the equipment for at least 30 minutes;

[0028] The fourth step, under the action of the booster pump, pressurize until the sealed equipment presses out the repair fluid;

[0029] The fifth step is to repeatedly flush the casting by increasing and decreasing the pressure of the airtight device, sucking in and pressing out the water in the airtight device;

[0030] The sixth step is repairing, vacuuming again, and then introducing carbon dioxide gas to react with the repairing fluid penetrating into the casting to finally generate silicon dioxide to complete the repair.

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PUM

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Abstract

The invention provides a casting gap repair method. Repair liquid flows in deep holes and tiny air holes of a casting through vacuum diffusion, carbon dioxide reacts with the repair liquid, and retained silicon dioxide is generated for filling repair. The repair liquid to which water-soluble sodium silicate flows is vacuumized, the diffusion rate of molecules of the repair liquid is multiplied, diffusion time is greatly shortened, the air molecule number of the repair liquid is close to zero in a vacuum state, gaps in the casting are in a vacuum suction state, and the deep holes and the tiny air holes of the casting are quickly and fully filled with the water-soluble sodium silicate. Before carbon dioxide flows in, vacuumization is conducted again, the carbon dioxide fully reacts with the water-soluble sodium silicate in a closed container, finally, silicon dioxide is generated and retained in the air holes of the casting, and therefore the hardening repair effect is achieved.

Description

technical field [0001] The invention relates to the field of casting repair, in particular to a casting gap repair method. Background technique [0002] At present, known casting repairs include welding repairs, rubber repairs, etc. Welding repair is to repair the surface of the casting by means of high-temperature melting metal produced by electric welding or oxyacetylene flame, which will generate thermal pressure, and the fatigue strength of the repaired part will become lower; glue repair is to apply casting repair on the surface of the casting The glue, through the reaction and hardening of the binary glue within a certain period of time after mixing, achieves the purpose of repairing. Above-mentioned two kinds of methods can only mend the shallow hole of casting surface, even if the deep hole of casting surface has been repaired, its inside is still hollow, and the intensity of its casting itself has not obtained any strengthening. It is even more helpless for tiny p...

Claims

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Application Information

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IPC IPC(8): B22D45/00
Inventor 陈天杰苏黎
Owner 遵义金业机械铸造有限公司
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