Hydraulic Cartridge Directional Control Valve with high-precision valve hole, AAK helped Santiago win big order

China [CN]

The cylindricity of the valve hole of the hydraulic cartridge directional control valve is 0.002mm, and the roughness is Ra0.05. The supplier who has cooperated for 3 years gave up 2 weeks after receiving the order. After AAK took over, the precision of the hydraulic cartridge directional control valve was constantly challenged from 3 aspects. After processing, the cylindricity was less than 0.001 mm, the roughness was Ra 0.04, and the consistency of component dimensions was within 0.001 mm. 3 months later, Santiago gave AAK an order for 1000 hydraulic cartridge directional control valves. 

Santiago is from a hydraulic equipment manufacturing company in Brazil. In January this year, their company needed a batch of hydraulic power units with high requirements, which also had high requirements for hydraulic cartridge directional control valves, especially the valve hole cylindricity below 0.002mm and roughness Ra0.05. Santiago chose a hydraulic cartridge valve manufacturer who had cooperated for 3 years to make samples. 2 weeks later, the manufacturer gave up due to not able to meet the valve hole high accuracy of the hydraulic cartridge directional control valve. Santiago found AAK on Google and needed our help to sample it. After communication, we learned that the original manufacturer was not helpful. I told him that for hydraulic cartridge valves with similar accuracy, we had customized them and also supplied them to Brazilian customers. Santiago seemed to see hope and sent a test order for 20 hydraulic cartridge directional control valves. After 40 days, AAK delivered samples.

After receiving the samples, Santiago just advised us that the sample accuracy met the requirements, and there was no further news. 3 months later, Santiago suddenly sent us an order for 1000 hydraulic cartridge directional control valves, and advised us that their customer was very satisfied with their hydraulic power units. They successfully received a large order from customer. They also stressed the importance of large goods, and should ensure that there is no deviation in accuracy. AAK's machining of hydraulic cartridge directional control valve holes with high precision requirements mainly comes from 3 points. Once determined, there is no deviation.

1. In the rough machining process, the high-precision machine tool in Japan and the high-pressure internal cold drilling U-drill are used. The range of valve hole diameter can be 13.5mm, and the hole straightness can be within 0.02mm. General hydraulic cartridge valve manufacturers do not have this kind of drill.

2. In the high-precision valve hole honing, the fixed size honing is adopted, which does not expand or shrink during processing, and the size allowance can be gradually removed in order. After processing, the cylindricity can be less than 0.001 mm, the roughness Ra0.04, and the size consistency of each element is within 0.001 mm.

3. For the machining of micro oil passage holes, micro hole EDM and micro hole jet grinding are used to remove the burrs at the cross holes and effectively improve the surface roughness of the inner holes. The hole diameter tolerance after machining is 0.001mm and the ring belt coaxial is 0.001mm.

AAK hydraulic cartridge directional control valve, with unique processing skills, you are welcome to try a small order!

https://www.aakindustry.com/info-detail/directional-control-valves-aak455