Hydraulic support oil cylinder refabrication method based on CMT (Cold Metal Transition)

A hydraulic support and remanufacturing technology, which is applied in the field of metal surface engineering, can solve the problems of high cost, waste of resources, and large thermal deformation of oil cylinders, etc., and achieve the effects of improving service life, reducing overall cost, and reducing heat input
CN110142576AInactive Publication Date: 2019-08-20YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
YANSHAN UNIV
Publication Date
2019-08-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a hydraulic support oil cylinder refabrication method based on CMT and belongs to the technical field of metal surface engineering. The hydraulic support oil cylinder refabrication method comprises the steps that mechanical machining and cleaning are firstly performed on the oil cylinder inner wall to be repaired in sequence, then CMT welding is performed on the hydraulic support oil cylinder inner wall, finally, the mechanical machining is performed on a CMT weld layer, and a refabricated hydraulic support oil cylinder is obtained. According to the hydraulic support oilcylinder refabrication method based on the CMT, the cold metal transition welding technology is utilized to weld the hydraulic support oil cylinder inner wall, heat input and spatter are less in thewelding peocess, the fact that the refabricated oil cylinder will not lose efficacy due to heat deformation can be guaranteed, and the service life of the oil cylinder is prolonged; by means of the manner that the mechanical machining is performed on the oil cylinder inner wall before and after the welding, the surface smoothness, the size and the tolerance of the oil cylinder all can be guaranteed to meet the drawing requirements; and meanwhile, the refabrication method provided by the invention is low in cost and high in efficiency, and full-automatic production can be realized.
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Description

technical field

[0001] The invention relates to the technical field of metal surface engineering, in particular to a method for remanufacturing a hydraulic support cylinder based on CMT. Background technique

[0002] The hydraulic support is the main load-bearing part for support in underground coal mining operations. Due to its harsh working conditions, it is often exposed to high temperature and high humidity conditions, and is susceptible to corrosion and wear; at the same time, the splashed hard Coal gangue particles are easily attached to the surface of the hydraulic support column, which can easily lead to failure of the hydraulic support cylinder seal ring. In this way, various corrosive media and hard granular substances can easily slide into the hydraulic support cylinder through the surface of the column, and continuously wear and corrode the inner wall of the hydraulic cylinder, resulting in early failure of the hydraulic support cylinder.

[0003] If the damaged...

Claims

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