Hangzhou pneumatic diaphragm regulating pneumatic valve to share the basic principle of pneumatic valve sealing surface grinding

regulating pneumatic valve seal is implemented by pneumatic seat and disc, therefore, adjust pneumatic valve in the pneumatic valve and pneumatic seat processing, is the key in the production of pneumatic valve. In order to ensure the sealing performance of the pneumatic valve, requirement of pneumatic seat with pneumatic disc in processing with high degree of surface roughness and plane, so you need on the sealing surface grinding. Grinding machining quality and efficiency, will directly affect the quality and production efficiency of pneumatic valve. Therefore, to reasonable design using grinding tool.
the basic principle of sealing surface grinding including grinding process, grinding, grinding, lapping pressure and lapping speed allowance five aspects.

, grinding process tool with good joint sealing ring surface, for complex grinding tool along the joint surface movement. Between the tool and the sealing surface with grinding agent, when the tool and sealing ring surface relative motion, parts of the abrasives grind grain between the tool and the sealing ring surface sliding or rolling, cut very thin layer of metal sealing ring surface.
seal on the surface of the convex part of the first peak is ground, and then gradually meet the requirements of geometry. Grinding process is not only the abrasive machining of metal, as well as chemistry. Abrasives in the oil can make the processed surface oxidation film, so as to accelerate the grinding process.
,
grinding movement tool and sealing ring surface relative movement, the sealing ring every point on the surface of the tool relative sliding distance should be the same. And, the direction of relative movement should be constantly changes. Changing movement direction to make each grits don't repeat yourself on sealing ring surface movement track, lest cause obvious higher grinding crack and roughness on the surface of the sealing ring. In addition, the changing of direction can also make the abrasives distribution more uniform, thereby more evenly cut to seal the surface of the metal. Although complex grinding movement, direction, although the weather changes, but the grinding movement is always along the joint surface on the surface of the tool and the sealing ring, manual grinding or mechanical polishing, seal surface geometry precision is mainly affected by the tool geometry precision and the influence of ground movement.
,
grinding speed lapping movement speed faster, and the higher grinding efficiency. Grinding speed, on a per unit time the workpiece surface by grinding grain is more, cut off the metal and more. Pneumatic valve sealing surface is associated with the materials of sealing surface grinding speed, copper and iron sealing surface grinding speed of ~ m/min. Hardened steel and carbide seal face ~ m/min. Austenitic stainless steel sealing surface for ~ m/min.
,
grinding pressure grinding efficiency along with the augment of the grinding pressure, grinding pressure too high, normally. ~。 MPa。 Grinding cast iron, copper, and the sealing face of the austenitic stainless steel material, the grinding pressure is zero. ~。 MPa； Hardened steel and carbide seal face to. ~。 MPa, coarsely ground take larger value, the lapping of smaller value.

, grinding allowance due to grinding is finishing machining process, so the cutting amount is very small. Depends on the size of the grinding allowance on the procedure of the machining accuracy and surface roughness. Trace of working procedure processing on guarantee to remove and correct seal under the premise of geometric error, the smaller the grinding allowance for the better. Shall generally be carried out before sealing surface grinding fine grinding. After fine grinding of the sealing surface can be directly lapping, the smallest grinding allowance for: allowance for the diameter. ~。 mm； Half allowance for at a time. ~。 mm。 Manual grinding or materials at high hardness of small value, low mechanical polishing or material hardness of great value. Pneumatic valve sealing surface inconvenience of grinding, can be used to fine cars, fine after sealing surface coarsely ground should be made before lapping, its plane allowance for. ~。 mm。