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A method for repairing and remanufacturing the outer surface of a hydraulic cylinder piston rod or an intermediate cylinder

A technology of piston rod and outer surface, applied in the field of equipment repair and remanufacturing, can solve the problems of limiting the wide application of surface laser cladding, unacceptable time period of repair, and thin single-layer thickness of surface cladding, and achieves good economical application. performance, avoid serious environmental pollution problems, and improve the effect of repair performance

Active Publication Date: 2016-08-31
SHAANXI TIANYUAN MATERIALS PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its shortcomings are also very prominent: (1) The high cost is its biggest problem. Since it is necessary to repair the entire surface of the repaired piston rod and intermediate cylinder, the cost exceeds 2-3 times the price of the parts themselves; The time period is also unacceptable; (2), the thickness of the surface cladding layer is relatively thin, which cannot solve the repair of parts with large curvature, and the time period for 2 or 3 times of multiple cladding also needs to be extended by 2-3 times
These defects directly limit the wide application of surface laser cladding in the repair of hydraulic supports in coal mines

Method used

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  • A method for repairing and remanufacturing the outer surface of a hydraulic cylinder piston rod or an intermediate cylinder
  • A method for repairing and remanufacturing the outer surface of a hydraulic cylinder piston rod or an intermediate cylinder
  • A method for repairing and remanufacturing the outer surface of a hydraulic cylinder piston rod or an intermediate cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The repair and remanufacturing of the outer surface of the hydraulic cylinder piston rod or intermediate cylinder with an outer diameter of Ф380mm includes the following steps:

[0048] (1) Clamp the piston rod or intermediate cylinder on a standard lathe, turn to remove the remaining electroplating layer on the surface,

[0049] Turning thickness is 1.0mm;

[0050] (2) Perform sandblasting on the outer surface of the treated piston rod or intermediate cylinder, using 18-mesh brown corundum sand material, and the sandblasting air pressure is 0.7Mpa. After sandblasting, use the same pressure of high-pressure gas to clean the surface after sandblasting;

[0051] (3) Place the piston rod or intermediate cylinder treated in step (2) in an oven for preheating, the preheating temperature is 100°C±10°C, and the preheating time is 30 minutes;

[0052] (4) Immediately clamp the piston rod or intermediate cylinder preheated in step (3) on the arc thermal spraying device for arc th...

Embodiment 2

[0058] Repair and remanufacture the outer surface of the piston rod or intermediate cylinder with an outer diameter of Ф260mm:

[0059] (1) Clamp the piston rod or intermediate cylinder on a standard lathe, turn to remove the remaining electroplating layer on the surface,

[0060] Turning thickness is 1.0mm;

[0061] (2) Perform sandblasting on the outer surface of the treated piston rod or intermediate cylinder, using 18-mesh brown corundum sand material, and the sandblasting air pressure is 0.7Mpa. After sandblasting, use the same pressure of high-pressure gas to clean the surface after sandblasting;

[0062] (3) Place the piston rod or intermediate cylinder treated in step (2) in an oven for preheating, the preheating temperature is 100°C±10°C, and the preheating time is 30 minutes;

[0063] (4) Immediately clamp the piston rod or intermediate cylinder preheated in step (3) on the arc thermal spraying device for arc thermal spraying. The specific spraying parameters are: u...

Embodiment 3

[0069] Repair and remanufacture the outer surface of the piston rod with an outer diameter of Ф150mm:

[0070] (1) Clamp the piston rod on a standard lathe, turn to remove the remaining electroplating layer on the surface, and turn the thickness

[0071] 0.8mm;

[0072] (2) Sandblast the outer surface of the treated piston rod, using 20-mesh brown corundum sand material for sandblasting, with a sandblasting air pressure of 0.6Mpa, and use high-pressure gas of the same pressure to clean the surface after sandblasting;

[0073] (3) Place the piston rod treated in step (2) in an oven for preheating, the preheating temperature is 100°C±10°C, and the preheating time is 30 minutes;

[0074] (4) Immediately clamp the piston rod preheated in step (3) on the arc thermal spraying device for arc thermal spraying. The specific spraying parameters are: use powder core wire with a diameter of 1.6mm for arc thermal spraying, thermal spraying When the voltage is controlled at 39V, the curre...

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Abstract

The invention provides a method for repairing and remanufacturing the surface of a piston rod of a hydraulic cylinder or the outer surface of an intermediate cylinder for coal mines. Aiming at remanufacturing after the surface of the piston rod of the hydraulic cylinder or the outer surface of the intermediate cylinder for the coal mines is damaged and fails, the long-term practice is combined, a metal wire adopting the specific metal powder proportion is creatively designed to serve as a powder core wire, and namely the metal wire is formed by wrapping the metal powder with Cr, Ni and Fe as the main ingredients through a stainless steel foil layer; based on the arc thermal spraying process method, the surface is repaired and remanufactured creatively, and on the premise that the corrosion resistance and the hardness of the repaired layer of the surface are equal to those of the surface treated through the surface laser cladding technology, consideration is given to the good economic applicability and the good practical production efficiency; an existing electroplating technology can be completely replaced, and the method has the wide application and popularization prospects in repairing of the piston rod of the hydraulic support oil cylinder and the intermediate cylinder for the coal mines.

Description

technical field [0001] The invention relates to the technical field of repair and remanufacture of equipment, and more specifically relates to a method for repair and remanufacture of a piston rod of a hydraulic cylinder or an outer surface of an intermediate cylinder. Background technique [0002] Both the piston rod and the intermediate cylinder are important parts of the hydraulic cylinder. The piston rod is a necessary part of the single-stage and multi-stage hydraulic cylinders. It is usually made of 45# steel or 27simn alloy steel to make a solid rod structure, while the intermediate cylinder is used for In the multi-stage hydraulic cylinder system, the hollow tube structure is usually made of 45# steel or 27simn alloy steel. The piston rod is stretched in the hollow structure of the intermediate cylinder, and at the same time, the intermediate cylinder itself is stretched in the larger diameter external oil cylinder. . Therefore, the surface of the piston rod and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/02B23P6/00
CPCB23K9/048B23P6/02
Inventor 王春昌刘鸣苏成明张亚飞马尚
Owner SHAANXI TIANYUAN MATERIALS PROTECTION TECH
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