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Stretch repair process of hydraulic cylinder piston rod

A technology for a piston rod and a hydraulic cylinder, which is applied in the field of repairing the repairing process of the piston rod of a hydraulic cylinder, can solve the problems of poor repairing effect, pollution, environment, etc., and achieve the effects of prolonging the service life, avoiding interaction and reducing the amount of wear and tear.

Inactive Publication Date: 2018-04-13
SICHUAN CHANGJIANG HYDRAULIC TIANCHENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the problems of poor repair effect, pollution and environment of the existing hydraulic cylinder piston rod electroplating repair process, the present invention provides a hydraulic cylinder piston rod strain repair process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A process for repairing a strain on a piston rod of a hydraulic cylinder, which is characterized in that it comprises the following steps:

[0024] (1) Use a lathe to completely remove the original plating layer on the surface of the piston rod, and the turning depth is determined according to the original plating thickness;

[0025] (2) Clean the damaged surface with trichloroethylene or perchloroethylene;

[0026] (3) Sandblasting the damaged surface of the piston rod;

[0027] (4) Using tungsten-cobalt alloy metal alloy powder, the mass percentage content of each alloying element is: Co 49%, W45%, Ni 2%, Cr 3.5%, Fe 0.5%, and the binder and the metal alloy powder are prepared into Paste, then use compressed air spray gun to send the metal alloy powder to the damaged surface of the piston rod, the spray gun pressure is 0.35MPa, and the workpiece surface in the spray gun nozzle is 350mm;

[0028] (5) Fill the molten pool with nitrogen as a protective gas, and use laser to irrad...

Embodiment 2

[0032] A process for repairing a strain on a piston rod of a hydraulic cylinder, which is characterized in that it comprises the following steps:

[0033] (1) Use a lathe to completely remove the original plating layer on the surface of the piston rod, and the turning depth is determined according to the original plating thickness;

[0034] (2) Clean the damaged surface with trichloroethylene or perchloroethylene, and heat the piston rod to 300 degrees Celsius;

[0035] (3) Sandblasting the damaged surface of the piston rod;

[0036] (4) Using tungsten-cobalt alloy metal alloy powder, the mass percentage content of each alloying element is: Co 50%, W40%, Ni 5%, Cr 4%, Fe 1%, and the binder and the metal alloy powder are prepared into Paste, then use a compressed air spray gun to send the metal alloy powder into the damaged surface of the piston rod, the spray gun pressure is 0.35MPa, and the workpiece surface in the spray gun nozzle is 350mm;

[0037] (5) Fill the molten pool with nitr...

Embodiment 3

[0041] A process for repairing a strain on a piston rod of a hydraulic cylinder, which is characterized in that it comprises the following steps:

[0042] (1) Use a lathe to completely remove the original plating layer on the surface of the piston rod, and the turning depth is determined according to the original plating thickness;

[0043] (2) Clean the damaged surface with trichloroethylene or perchloroethylene, and heat the piston rod to 500 degrees Celsius;

[0044] (3) Sandblasting the damaged surface of the piston rod;

[0045] (4) Using tungsten-cobalt alloy metal alloy powder, the mass percentage content of each alloying element is: Co 49%, W45%, Ni 2%, Cr 3.5%, Fe 0.5%, and the binder and the metal alloy powder are prepared into In paste form, the compressed air spray gun is used to send the metal alloy powder into the damaged surface of the piston rod, the spray gun pressure is 0.6MPa, and the workpiece surface in the spray gun nozzle is 500mm;

[0046] (5) Fill the molten po...

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Abstract

The invention discloses a stretch repair process of a hydraulic cylinder piston rod, and relates to the technical field of hydraulic equipment, which solves the problems of bad repair effect and environmental pollution of an existing electroplating repair process of the hydraulic cylinder piston rod. The stretch repair process comprises the following steps of (1) completely turning an original electroplated layer from the surface of a piston rod by using a lathe, and determining the turning depth according to the thickness of the original electroplated layer; (2) cleaning the surface of a damage with trichloroethylene or perchloroethylene; (3) performing sand blasting treatment on the surface of the damage of the piston rod; (4) sending metal alloy powder to the surface of the damage of the piston rod; (5) irradiating the surface of the damage of the piston rod with laser, so that the metal alloy powder is molten so as to form a repair layer; (6) insulating the repaired piston rod, andslowly cooling to room temperature; and (7) further processing the surface dimension and roughness of the piston rod by using turning and polishing equipment. The repair process has the advantages ofhigh strength of the repair layer, long service life and no pollution.

Description

Technical field [0001] The invention relates to the technical field of hydraulic equipment, and more specifically to a repair process for a hydraulic cylinder piston rod strain. Background technique [0002] The piston rod is the main component of the hydraulic transmission cylinder, and also the load-bearing component in the hydraulic transmission cylinder that converts the pressure of the hydraulic oil into the output of the transmission force. Under the pressure of the hydraulic oil, the piston rod frequently reciprocates linearly in the cylinder. Once there is a lack of cooling lubricating oil or foreign matter such as dust enters the cylinder, it will cause the piston rod surface to be rough, hydraulic oil leaks, and the cylinder moves. The conversion efficiency of precision and force is reduced, and even the cylinder is scrapped, resulting in the shutdown of the entire mechanical system. [0003] At present, piston rods generally need to go through more than a dozen complica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/07C22C30/00
CPCC23C24/106C22C19/07C22C30/00
Inventor 张勇
Owner SICHUAN CHANGJIANG HYDRAULIC TIANCHENG MACHINERY
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