Combustion engine crankshaft electric spark overlaying repairing process

A technology of electric spark and internal combustion engine, applied in the direction of arc welding equipment, manufacturing tools, welding equipment, etc., can solve problems such as flaw detection, and achieve the effect of small color difference

Inactive Publication Date: 2010-12-22
甘肃景程光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, a large number of key components cannot pass the magnetic particle inspection and are discarded

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, the crankshaft journal is repaired with the internal combustion engine crankshaft electric spark surfacing repair process of the present invention, and its steps are as follows:

[0021] (1) Clean the crankshaft journal surface with acetone at room temperature to remove stains and rust.

[0022] (2) Use magnetic particle and penetrant testing methods to determine the location of the crack, and use a precision grinder to remove the crack until no crack is displayed.

[0023] (3) A 3kW electric spark repair machine is selected, the working gun is manually rotated, and the nickel-based or Stellite alloy electrode is used to carry out micro-arc surfacing welding through the consumable electrode under the protection of argon gas. The specific process parameters are as follows: output voltage 80V, frequency 400Hz, argon gas flow rate 5L / min, strengthening speed 2min / cm 2 .

[0024] (4) After the electric spark deposition is carried out on the surface of the cr...

Embodiment 2

[0025] Embodiment 2, the crankshaft oil plugging hole is repaired with the internal combustion engine crankshaft electric spark surfacing repair process of the present invention, and its steps are as follows:

[0026] (1) Clean the surface of the crankshaft oil plugged hole with acetone at room temperature to remove stains and rust.

[0027] (2) Use magnetic particle and penetrant testing methods to determine the location of the crack, and use a precision grinder to remove the crack until no crack is displayed.

[0028] (3) A 3kW electric spark repair machine is selected, the working gun is manually rotated, and the nickel-based or Stellite alloy electrode is used to carry out micro-arc surfacing welding through the consumable electrode under the protection of argon gas. The process parameters are as follows: output voltage 80V, frequency 1000Hz, argon gas flow rate 5L / min, strengthening speed 2min / cm 2 .

[0029] (4) After the electric spark deposition is carried out on the...

Embodiment 3

[0030] Embodiment 3, the crankshaft crank is repaired with the internal combustion engine crankshaft electric spark surfacing repair process of the present invention, and its steps are as follows:

[0031] (1) Clean the surface of the crankshaft with acetone at room temperature to remove stains and rust.

[0032] (2) Use magnetic particle and penetrant testing methods to determine the location of the crack, and use a precision grinder to remove the crack until no crack is displayed.

[0033] (3) A 3kW electric spark repair machine is selected, the working gun is manually rotated, and the nickel-based or Stellite alloy electrode is used to carry out micro-arc surfacing welding through the consumable electrode under the protection of argon gas. The process parameters are as follows: output voltage 80V, frequency 200Hz, argon gas flow rate 5L / min, strengthening speed 3min / cm 2. .

[0034] (4) After the electric spark deposition is carried out on the surface of the crankshaft li...

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PUM

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Abstract

The invention relates to a combustion engine crankshaft electric spark overlaying repairing process. The process includes that: oil removing and rust removing are carried out on the surface of crankshaft at room temperature; magnetic powder and liquid penetrating test are utilized to determine crack position and polishing is carried out to remove the crack; 3kW electric spark repairing machine is selected, a working gun is manually rotated, the clamped nickel base or stellite electrode is utilized, under the protection of argon, microarc overlaying is carried out by a consumable electrode, the technological parameters thereof are that: output voltage is 70-80V, frequency is 70-2000Hz, argon flow is 4-5L / min, and strengthening speed is 2-3min / cm; and crankshaft magnetic powder defect detector is utilized to detect magnetic powder inspection at the repairing position. The fatigue strength and wear resisting property of the repaired crankshaft can meet the requirement, minimum chromatism between electric spark overlaying layer and base material can be realized, and no related magnetic track is produced in magnetic powder detection. The invention can realize magnetic powder inspection generally adopted by railway system.

Description

technical field [0001] The invention relates to a repair process for an internal combustion engine crankshaft, in particular to an electric spark surfacing repair process for an internal combustion engine crankshaft. Background technique [0002] In railway transportation, locomotives undertake important passenger and freight traction tasks. With the rapid development of the national economy, railway transportation is developing towards high-speed and heavy-duty. service life. The crankshaft is the most important part of the internal combustion engine. It bears large bending and torsional stresses during its work, making the journal wear and fatigue fracture a common form of damage to the crankshaft. Since these damage forms originate from the surface, the surface of the crankshaft Reinforcement and restoration are particularly important. [0003] At present, the methods for strengthening and repairing the surface of the crankshaft include medium and high frequency induct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00B23K9/04B23K9/173G01N27/84
Inventor 安兵
Owner 甘肃景程光电技术有限公司
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