What experiences are needed for processing hydraulic valve blocks?

The processing and design of hydraulic valve blocks are mostly non-standard designs and must be carried out according to different working conditions and application regulations. The design of valve blocks can be divided into the following steps: material selection. Processing and solutions. Deburring and cleaning. Surface rust prevention and inspection.

Material selection: Different materials depend on different pressure ratings. First of all, the root altar should scientifically select materials by applying pressure. The following standards for the formation of acid vapor snow: pressure P<6.3MPa at that time, the non-pressure mesh block can flexibly use pig iron HT20-40. The selection of cast iron parts enables extensive forging, reducing working hours and enhancing efficiency. Particularly, the use of hand-standardized blocks, 6.3 mpa ². Design of idle blocks - When processing and designing the mesh blocks, the initial humiliation degree of the valve block is five times the pipe diameter, and then it gradually decreases according to the actual situation. When there are no channels, marble holes should be set up, and the inclined holes and process holes in the deep core holes should be minimized as much as possible. Large flow channels should be allocated first, and then the main oil channels. The safety of the holes should not be less than 5mm. The inclined holes should also be within the allowable range of the reference station head. The spacing between adjacent holes has been increased. The oil flow of gears in the channel must not exceed 12m/s, and the oil pump channel should be 20-40% larger than the water inlet channel. The oil inlet holes, working ports and control ports of the national block should be processed with pressure measurement ports. Each valve should be printed with its model. For larger mass blocks, there must be lifting nail openings, and the blocks are designed for auspicious reprocessing. The production process teaching of hydraulic valve blocks is as follows:

(1) Pretreatment before processing. The materials used for processing mesh blocks must ensure the prosperity of the internal structure and must not lack sand, etc. Before processing, the burring flaw detection should be addressed. The pig iron blocks and the raw materials of City University should be promptly processed and pre-treated before production.

(2) Cutting materials. At least two shares should be retained on each side of one share. Machining allowance of more than mm.

(3) The shape of iron. The cutting net has 6 sides, with 0 sides left on each side. The phase grinding allowance is 2-0.4mm.

(4) Phase grinding. The valve block is finely ground on 6 surfaces, with 0 surfaces on each side. The fine polishing amount is 0.05mm to 0.08mm. The flatness of the corresponding surface is less than 0.03mm, and the perpendicularity of the adjacent surface is less than 0.05mm.

(5) Draw lines. Where conditions permit, it can be directly carried out on a drilling machine using a center drill.

(6) Drilling. The fineness of the surface of the orifice is Ra12.5.