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High Precision Oil Cylinder Seamless Steel Tube

High Precision Oil Cylinder Seamless Steel Tube

Cylinder tube is a kind of high precision steel pipe material which is processed by cold drawing or hot rolling. Because of the internal and external walls of precision steel tube without oxidation layer under high pressure, no leakage, high precision, high smoothness, cold bending deformation,...

Cylinder tube is a kind of high precision steel pipe material which is processed by cold drawing or hot rolling. Because of the internal and external walls of precision steel tube without oxidation layer under high pressure, no leakage, high precision, high smoothness, cold bending deformation, flaring and flattening without cracks a bit, it mainly used in the production of pneumatic or hydraulic components of the products, such as cylinder or oil cylinder, can be seamless tube. The chemical composition of cylinder tube includes carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P and chromium Cr.


cylinder tube Processing technology
The cylinder tube is made by rolling process, because the surface layer has residual compressive stress on the surface, which helps to seal the tiny cracks on the surface and hinder the expansion of the erosion. Therefore, the corrosion resistance of the surface can be improved, and the fatigue crack can be delayed or enlarged so as to improve the fatigue strength of the cylinder tube. Through rolling, rolling surface to form a layer of cold hardening layer, reduces the grinding contact surface of the elastic and plastic deformation, thus improving the wear resistance of the cylinder inner wall of the pipe, and avoid grinding burns caused by. After rolling, the decrease of surface roughness can improve the matching property.

Rolling process is a kind of machining without chip. Under the normal temperature, the micro deformation of the workpiece surface is rolled with the plastic deformation of the metal, so as to change the surface structure, mechanical characteristics, shape and size. Therefore, this method can achieve two purposes of finishing and strengthening at the same time, which can not be achieved by grinding.

No matter what processing processing method, leaving marks of the fine irregularities on the surface of parts will appear the phenomenon of peak valley cross rolling,
Rolling processing principle: it is a kind of pressure finishing, is characterized by the use of cold plastic metal at room temperature, using the rolling tool to put some pressure on the surface of the workpiece, the workpiece surface of metal plastic deformation, fill in the original residual indentation trough, and reach the surface roughness value reduction. Due to the rolling surface of metal plastic deformation, so that the surface microstructure of cold hardening and grain refinement, forming a dense fibrous, and the formation of residual stress, hardness and strength, so as to improve the surface wear resistance, corrosion resistance and compliance. Rolling is a non cutting plastic processing method.


Several advantages of cylinder tube
1. improve the surface roughness, roughness can reach Ra or 0.08µ m.
2. amendment, roundness, ovality can be less than 0.01mm.
3. improve the surface hardness, the deformation is eliminated, the hardness increased more than 4 DEG HV
4. residual stress layer after processing, improve fatigue strength increased by 30%.
5. improve the quality of cooperation, reduce wear and tear, prolong the service life of parts, but the processing cost of parts is reduced.


Advantages:
a. Extensive production experience: we are specialized in cylinder, piston rod and cylinder barrel with an experience of 10 years.

b. Complete production facilities: owning precision  straightening machine, fine polishing machine, precision lathe and other advanced equipments. Our technicians will do regular scheduled maintenance on these machines to guarantee them work well.

c. High quality raw material: we mainly choose raw material from big steel factory, such as TPCO, BAO STEEL, SHA STEEL, which are best and largest raw material manufacturer in China.

d. Strict Physical/Chemical testing procedures: meeting the requirements of the product design and process, providing reliable testing data.


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