The length diameter ratio of Hydraulic Directional Valve is 20:1. More than 10 h

Evander comes from a Greek hydraulic equipment company and has been in the company for 5 years. At the beginning of the year, the hydraulic stretching machine they developed needed to purchase hydraulic directional control valves with large length diameter ratio. He chose to work with a supplier for 3 years to try, and the manufacturer reported that the length diameter ratio of the valve hole of the hydraulic directional control valve is 20:1, and the valve hole Ra is not more than 0.3. He is not confident, but he can try. 2 months later, the test run was not smooth. Indeed, the hydraulic direction control valve was slow to respond, and the manufacturer surrendered. Evander contacted more than another 10 hydraulic valve manufacturers for this hydraulic directional control valve, but all of them are not 100% confident of doing this valve with the length diameter ratio of 20:1. 10 weeks have passed, but the manufacturer has not been determined yet. Evander is very worried.

Evander saw an article of AAK on B2B about "Hydraulic relief valve with length diameter ratio of 11:1" and left a message to AAK: Is AAK confident to do a hydraulic directional control valve with the length diameter ratio of 20:1 and Ra is not more than 0.3? My reply: It's right to ask AAK about the length diameter ratio. We have produced 25:1 hydraulic check valves in mass production. It is suggested that he send his drawings of hydraulic directional control valve and AAK directly make samples. If the length diameter ratio is not in accordance with the standard, the development cost will be returned. Evander is happy and nervous. He is happy that the manufacturer has been determined. He is afraid of wasting time.

Evander waited for 4 weeks in fear, until his engineer told him that the processing size and accuracy of the AAK hydraulic directional control valve were up to standard, and the test machine was also successful, and Evander was completely relieved. I told him that the hydraulic directional control valve with deep hole is difficult to process. The greater the length diameter ratio, the more difficult it is. Even if it is processed, the precision is a hidden danger. This is also the reason why many hydraulic valve manufacturers surrender.

AAK adheres to the size accuracy, geometric accuracy and surface roughness of the valve hole, and optimizes the processing technology. We do in the following way, it is difficult for the general hydraulic valve manufacturers to imitate.

1. According to the blank condition, steel properties, length diameter ratio, determine the drill and fixture, which requires experience and skill. In the 6 procedures of "drilling - expanding - boring - reaming - rigid boring reaming - diamond reaming", the cutting amount and working temperature are strictly controlled.

2. The rigid boring reamer is equipped with a guide at the front and back, ensuring straightness, especially the internal cooling chip removal, ensuring the surface finish of the valve hole.