A kind of engine crankshaft and its remanufacturing method

An engine and remanufacturing technology, applied in the crankshaft and other directions, can solve problems such as unfavorable after-sales service, non-compliance with the guiding spirit, and accessories that cannot be used universally, so as to avoid falling off and crack defects, high bonding force, and small heat affected zone.

Active Publication Date: 2016-06-08
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this way, the accessories cannot be used universally, which is not conducive to after-sales service, nor does it conform to the guiding spirit of the country for the remanufacturing industry

Method used

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  • A kind of engine crankshaft and its remanufacturing method
  • A kind of engine crankshaft and its remanufacturing method

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] Such as figure 1 and figure 2 Commonly shown, an engine crankshaft includes several journals, the journal includes a journal body 1, flanges 2 are provided at both ends of the journal body 1, and rounded corners are provided between the flange 2 and the journal body 1 3. The outer surface of the journal body 1 is provided with a laser cladding coating 4, preferably, the thickness A of the laser cladding coating 4 is 0.2 mm to 1 mm, and the laser cladding coating 4 is an alloy layer, which can be adjusted by adjusting the alloy Higher hardness and wear resistance due to powder composition,...

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Abstract

The invention discloses an engine crankshaft belonging to the technical field of engine remanufacturing. The engine crankshaft comprises a plurality of shaft necks, wherein each shaft neck comprises a shaft neck body, wherein flanges are arranged at two ends of the shaft neck body, a circular bead is arranged between each flange and the shaft neck body, a laser cladding coating is formed on the outer surface of the shaft neck body, a gap is left between the edge of the laser cladding coating and the corresponding circular bead, and nitriding layers are formed on the end surfaces, close to the shaft neck body, of the flanges, the circular beads and the gaps. The invention also discloses an engine crankshaft remanufacturing method. The remanufacturing method comprises the steps of removing a nitration layer or an oxidation layer on the surface of the shaft neck, forming the laser cladding coating, forming the nitration layer and restoring the product size. By using the remanufacturing method, the engine crankshaft with a defect on the shaft neck can be repaired under conditions of ensuring the safety factor and the whole performance of the crankshaft to meet the using requirements, the precision requirement of the crankshaft neck can be restored and the remanufacturing of the crankshaft of a high-speed engine can be achieved.

Description

technical field [0001] The invention belongs to the technical field of engine remanufacturing, in particular to an engine crankshaft and a method for remanufacturing the engine crankshaft. Background technique [0002] Remanufacturing is guided by the theory of the whole life cycle of products, with the goal of improving the performance of waste products, with high quality, high efficiency, energy saving, material saving, and environmental protection as the criteria, and with advanced technology and industrialization as means to repair and transform waste and old products. The general term for a series of technical measures or engineering activities of a product. [0003] The engine crankshaft is one of the important parts of the engine, and it is also one of the key parts that are easily damaged. The amount of scrap and demand in the market is far greater than that of the engine. The function of the crankshaft is to convert the reciprocating motion of the piston into rotar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C3/06B23P15/14
Inventor 韩继胜王圣斌李涛史学刚张玉博孙占昌
Owner WEICHAI POWER CO LTD
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