The paper cylinder cylinder structure material and the methods to improve the wear resistance

Cylinder and cylinder is the main part of the general material of cylinder structure is how to? How do we improve the wear resistance of cylinder? Cylinder of the cylinder material general use cold drawn steel tube, aluminum tube, stainless steel pipe, copper pipe and engineering plastic pipe. Small and medium-sized multi-purpose aluminum alloy cylinder tube and stainless steel tube, the use of magnetic switch of the cylinder of the cylinder, insist on using non magnetic materials. Cylinder, cylinder structure: the cylinder barrel generally adopt cylinder type structure, along with the development of the cylinder varieties, have use square, rectangular shape pipe material, also have for use with rotating cylinder elliptical inner hole of the special-shaped steel tubes. For cylinder inner surface has certain hardness, material to resist the wear of piston movement. Steel pipe inner surface should be chrome plated honing, coating thickness. mm； Aluminum alloy tube need to the hard anodic oxidation treatment, hard anodized film thickness - μm。 H cylinder and piston clearance fit precision, cylindricity tolerance for ( O. — 。 ) /, the surface roughness of Ra. ~。 μm。 Second, improve the cylinder wear resistance, to obtain from the following several aspects:, reasonable choice of honing grooves. Honing grooving to the brake cylinder liner wear. Honing is ° ~ ° Angle grooves, each cutting grooves must be very smooth, can not have broken down or pile material damage. And improve brake cylinder liner inner surface geometric accuracy. Brake cylinder liner inner hole machining geometry precision, if cooperate well with piston group, less air leakage, can reduce the wear and tear. Brake cylinder diameter size tolerance level for IT, the inner surface of roundness is level, the inner surface roughness should be no greater than Ra. μm。 , and the choice of appropriate materials and their heat treatment process is to improve the braking cylinder liner wear resistance is an important measure. Improve the morphology and distribution of graphite in cast iron, improve metallographic matrix organization, adding alloying elements, with a choice of cylinder liner hardness on the high side, against abrasion. Cylinder contains a variety of alloy elements, can make the iron organization even, high hardness of the formation of carbide to improve the strength of the brake cylinder, the corrosion resistance and abrasion resistance.