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Laser cladding repairing method for cylinder sleeve

A technology of laser cladding and repairing method, which is applied in the repairing process of hydraulic cylinders and cylinder liners of hydraulic cylinders. It can solve problems such as the reduction of cylinder movement accuracy and force conversion efficiency, the shutdown of mechanical systems, and the roughening of cylinder liners, etc., to achieve Effects of reducing spare parts cost and loss, prolonging service life, and reducing wear and tear

Inactive Publication Date: 2011-04-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The piston rod makes frequent reciprocating linear motions in the oil cylinder. Once foreign matter such as lack of cooling lubricating oil or dust enters the cylinder, it will cause roughening on the surface of the cylinder liner and leakage of hydraulic oil, which will reduce the movement accuracy and force conversion efficiency of the oil cylinder. Even the oil cylinder is scrapped, resulting in the shutdown of the entire mechanical system
[0003] At present, cylinder liners are made of quenched and tempered steel or alloy steel, and the production cost is relatively high. Once they are scrapped, it will cause a lot of waste. If the surface of ordinary cylinder liners, especially the working surface, can be repaired, the reuse of waste cylinder liners will be realized. Reduce the loss of enterprise spare parts and spare parts, so that the majority of hydraulic cylinder application enterprises can realize energy-saving and consumption-reducing production

Method used

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  • Laser cladding repairing method for cylinder sleeve
  • Laser cladding repairing method for cylinder sleeve
  • Laser cladding repairing method for cylinder sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Use a lathe to remove the 1mm metal fatigue layer of the body on the working surface of the waste hydraulic cylinder liner 1;

[0031] 2) Install the cylinder liner 1 on the fixture, and rotate the fixture at a linear speed of 600mm / min;

[0032] 3) Pour acetone on the working surface of cylinder liner 1 to clean off oily impurities;

[0033] 4) Heat the cylinder liner from 1 to 60°C with an alcohol blowtorch;

[0034] 5) Conveying the martensitic stainless steel powder to the working surface of the cylinder liner 1;

[0035] 6) Irradiate the martensitic stainless steel powder with a laser power of 3.5KW and a bandwidth of 3mm to melt it, and deposit a stainless steel surface layer 2 with a thickness of 3mm;

[0036] 7) Remove the cylinder liner from the fixture, and machine the cylinder liner size and roughness to meet the use size specifications.

Embodiment 2

[0038] 1. Use a lathe to remove the 2mm metal fatigue layer of the main body on the working surface of the waste hydraulic cylinder liner 1;

[0039] 2. Install the cylinder liner 1 on the fixture, and turn the fixture at a linear speed of 700mm / min;

[0040] 3. Pour acetone on the working surface of the cylinder liner 1 to clean off the oil and impurities;

[0041] 4. Heat the cylinder liner from 1 to 100°C with an alcohol blowtorch;

[0042] 5. Deliver martensitic stainless steel powder to the working surface of cylinder liner 1;

[0043] 6. Irradiate the martensitic stainless steel powder with a laser power of 3.5KW and a bandwidth of 3mm to melt it, and deposit a stainless steel surface layer 2 with a thickness of 7.3mm;

[0044] 7. Remove the cylinder liner from the fixture, and machine the cylinder liner size and roughness to meet the use size specifications.

[0045] Example 2:

[0046] (1). Use a lathe to remove the 0.5mm body metal fatigue layer on the working sur...

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Abstract

The invention discloses a laser clading repairing process for a cylinder sleeve. The process comprises the following steps: removing a 0.5-2mm body metal fatigue layer from the working surface of a cylinder sleeve through a lathe; after a workpiece is clamped, rotating the workpiece at a linear speed of 400-700mm / min, and washing away surface greasy impurity with acetone; heating the workpiece to 40-100 DEG, and cladding a layer of stainless steel as an antiwear corrosion-resisting surface layer through laser with power being 3.5KW and bandwidth being 3mm; and finally mechanically machining the laser cladding layer to achieve the use size specification of the cylinder sleeve. By the invention, the cylinder sleeve of an old hydraulic cylinder is repaired, the rejection rate of spare parts is reduced, the production cost is saved, and the repaired cylinder sleeve of the hydraulic cylinder has long service life and balanced operating performance. The method solves the use problems that the surface of the cylinder sleeve has burr, hydraulic oil leaks and the like as alternate motion of a piston rod when cooling lubricating oil or foreign matters enter the cylinder from the working surface of the cylinder sleeve.

Description

technical field [0001] The invention relates to a hydraulic oil cylinder in the field of mechanical equipment, in particular to a repair process for a cylinder liner of the hydraulic oil cylinder. Background technique [0002] Because the oil cylinder is easy to change directions, it can conveniently realize overload protection, can automatically adjust the traction speed within a given range, and can realize stepless speed regulation and high degree of automation. It is widely used in the hydraulic transmission system of mechanical devices. It is the main component of the hydraulic transmission cylinder and also the pressure bearing part of the hydraulic oil in the hydraulic transmission cylinder. The piston rod makes frequent reciprocating linear motions in the oil cylinder. Once foreign matter such as lack of cooling lubricating oil or dust enters the cylinder, it will cause roughening on the surface of the cylinder liner and leakage of hydraulic oil, which will reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 岑启宏蒋业华周荣黎振华崔小英
Owner KUNMING UNIV OF SCI & TECH
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