Do you know the process of manufacturing hydraulic valve block machining? Let's take a look at the hydraulic valve block processor Languang.
Manufacture of hydraulic valve block machining
1. Hydraulic valve block processing each intersecting processing hole
At the intersection of each hole after processing, especially if the metal iron scraps inside the slender hole are not completely cleaned, these iron scraps will enter the system due to the impact of multiple alternating pressure changes during use and cause pollution. Hydraulic valve block processor Languang uses the following methods to control this problem: first, use a small electric or pneumatic grinding wheel to clamp the rotary file, and use a round file for deep holes to clean the flash and burrs at the corners of the channel to achieve smooth and smooth connection; secondly, Use compressed air and high-pressure washing machine to high-pressure wash the dirt on the inner and outer surfaces of the tunnel; thirdly, use industrial, endoscope and cold light sources to check the flash burrs at the corners of the tunnel; after that, demagnetize with high-temperature alkaline water cooking, Use a white silk cloth to clean the residual water and oil in the pores.
2. Hydraulic valve block machining surface
In order to prevent the joint surface of the valve block and the component from leaking, surface roughness and flatness are extremely required. Generally, the roughness of the connecting surface between the component and the valve block should reach Ra0.8, and the connecting surface of the flange, pipe joint, and valve block should reach Ra0.8. The roughness should reach Ra1.6, and the flatness is generally ≤0.01/100mm. Therefore, the surface of the valve block, components, and other connecting surfaces need to be processed by grinding chips. When grinding debris, the magnetic field suction generated by the grinding machine disk makes the ferromagnetic abrasive debris adsorbed on the surface of the valve block or in the hole. This part of the abrasive debris particles is extremely difficult to be washed away, and will gradually disappear from the surface and the surface as the magnetic force is weakened and eliminated during use. The ducts fall off and enter the system, causing serious pollution. For this pollutant, first, demagnetize with a demagnetizer to make the residual magnetism ≤1GS; then use compressed air and a high-pressure washing machine to high-pressure wash the dirt on the outer surface; use high-temperature alkaline water cooking to demagnetize.
Hydraulic valve block processor Languang believes that for the super-long and super-large valve block plane with a length of more than 1000mm, the plane grinding process cannot be performed on the equipment due to the specification limit of the grinding machine so there will be no wear debris adsorbed on the surface of the valve block or in the hole. However, the plane roughness and flatness of the valve block cannot meet the design requirements of the drawing, and the connection surface of the valve, flange, pipe joint, etc. with the valve block will cause oil leakage, and it will also cause pollution. Therefore, an oil stone and a polishing machine should be used for grinding and polishing this kind of valve block, so that the plane can reach more than 100% contact on both sides, so that the surface roughness of the valve block can meet the requirements of connecting valves, flanges, and pipe joints, so as to reduce leakage and reduce Pollution.
3. Anti-rust treatment of hydraulic valve block
The anti-rust treatment on the surface of the valve block is very important. Whether you choose Q235 or 35# or 45#, it must be beautiful and applicable. Poor surface anti-rust treatment will bring pollutants directly into the system when repairing components, causing system pollution and accidents. Hydraulic valve block processor Languang knows there is a way to paint the surface. Direct printing of the valve block surface after assembly of the components. If the components are disassembled, replaced, and repaired by this method, the paint around the components is easily damaged, so the surface of the valve block lacks protection, and the fallen paint and other debris can easily enter the valve block orifice and cause system pollution.
Debugging of hydraulic valve block machining
The debugging of the hydraulic valve block refers to the debugging after the hydraulic valve and hydraulic components are installed on the valve block. The first is to clean the oil circuit, that is, to continuously replace the reversing valve to ensure that all the oil circuits can be cleaned; if there is a servo valve or proportional valve, the flushing cover needs to be replaced. This cleaning is different from the previous block. The cleaning treatment after the processing is completed cannot be omitted.
Debugging of hydraulic valve block machining includes pressure test and function test. During the test, the valve block can be directly connected to the hydraulic system by a Sino-foreign joint venture valve manufacturer, or the valve block test bench can be used alone to test the function of the valve block. The test pressure of the hydraulic valve block shall be determined according to the working pressure of the hydraulic system. When the working pressure is less than 16MPa, the test pressure is 1.5 times the working pressure; the working pressure is 16MPa～25MPa, and the test pressure is 1.25 times the working pressure; for the working pressure of 25MPa～31.5MPa, the test pressure is 1. Working 15 times the pressure.
The above is manufacture of hydraulic valve block machining and debugging of hydraulic valve block machining. If you are interested in the hydraulic valve block, please contact hydraulic valve block processor Languang to read more.