Method for processing crankshaft oil hole cleanliness

A technology of crankshaft oil hole and processing method, which is applied in the directions of crankshaft, shaft, shaft and bearing, etc., can solve the problems of oil hole cleanliness exceeding poor and difficult to completely remove, etc., and achieve the effect of improving the cleanliness level.

Inactive Publication Date: 2019-11-05
桂林福达曲轴有限公司
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Problems solved by technology

[0011] The foreign matter in the oil hole, among which the second type of iron filings, dirt in the cutting fluid (oil) and residual magnetic powder foreign matter are often easier to remove, and can be removed by general manual washing methods, but the first and third types Iron filings and sintered matter (yellow spots) after quenching are "sticking" to the crankshaft body and have plasticity. It is difficult to completely remove them with the current washing processing methods, including high-pressure cleaning. Therefore, they have been repeatedly used by customers. Complaints and feedback on oil hole cleanliness out of tolerance

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  • Method for processing crankshaft oil hole cleanliness

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Embodiment

[0041] A method for processing crankshaft oil hole cleanliness includes the following steps:

[0042] 1) Electrolysis to remove oil pore burrs, the schematic diagram of the principle of electrolysis to remove oil pore burrs is as follows figure 1 As shown, the working principle of electrolytic degreasing hole burr is to use electric energy and chemical energy to dissolve and deburr the anode. The parts are connected to the positive electrode of the AC power source, called anode, and the electrolytic rod is connected to the negative electrode of the AC power source, called cathode. Keep a certain gap between the two poles to allow the circulating electrolyte to flow. When the surface of the anode and the cathode undergo an electrochemical reaction, the surface of the part will form a layer of viscous liquid due to the re-dissolved metal and the electrolyte. Concentrated in the low recesses on the surface of the part, this viscous liquid has a higher resistance and a lower conducti...

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Abstract

The invention discloses a method for processing crankshaft oil hole cleanliness. The method comprises the following steps that 1), electrolytic deoiling hole deburring is conducted; 2), first-time manual cleaning is conducted; 3), an oil hole wall polishing is conducted; 4), second-time manual cleaning is conducted; and 5), high-pressure oil hole cleaning is conducted. The method effectively solves the problems that impurities such as the first type scrap iron, the third type scrap iron (iron powder) and a sintered object (yellow spot) after quenching is conducted are not removed thoroughly through total five procedures of the electrolytic deoiling hole deburring, the manual cleaning, the oil hole wall polishing, the manual cleaning and the high-pressure oil hole cleaning, and therefore, the cleanliness level of the crankshaft oil hole is improved, the requirements of customers are met, the total weight of the foreign matters on the inner surface of the oil hole is reduced from 30 mg to 7 mg, and the size of the foreign matter is reduced from 1.0 mm to 0.4 mm.

Description

Technical field [0001] The invention relates to the technical field of crankshaft processing of automobile engines, in particular to a method for processing crankshaft oil hole cleanliness. Background technique [0002] As one of the main parts of the engine, the quality of the crankshaft is very important to the performance and service life of the engine. As we all know, in addition to dimensional accuracy, form and position tolerances, cracks, surface hardness, etc., crankshafts have another important quality indicator: crankshaft cleanliness. The high-speed rotation of the engine is mainly due to the lubricating oil between the crankshaft and the bearing bush to maintain good lubrication, and the function of the crankshaft oil hole is to connect the oil path between the crankshaft and the bearing bush to keep the lubricating oil produced by the high-pressure oil pump passing smoothly The oil holes reach the surface of all bearing bushes, forming an oil film. And if the clean...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00B23P2700/07
Inventor 凤建林关文海黄春梅
Owner 桂林福达曲轴有限公司
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