AAK Hydraulic Cartridge Relief Valve High Precision Small Holes Processing

For hydraulic cartridge relief valves with precise small holes, most of
manufacturers encountered penetration when processing the Φ4.5H7、Φ4.7H7
holes. AAK used 3 advantages, which not only prevented penetration for 100%,
but also reached R0.2mm at the bottom of the small holes. After receiving the
samples of AAK hydraulic cartridge relief valves, Arvin sent a PO for hydraulic
cartridge relief valves of 20,000 dollars.

Precise small holes of hydraulic cartridge relief valves is a difficult problem
in machining. The vast majority of hydraulic cartridge valve manufacturers have
difficulty in controlling the processing tools, cutting parameters, cutting
stress and processing technology, resulting in easy deformation of components
or substandard accuracy. What's more, it is unstable. For example, the
precision of the small holes of this batch of hydraulic cartridge relief valves
reached the standard, but the next batch has hidden dangers. The most taboo
about the quality of industrial products is instability.

Arvin is from a hydraulic company in the United States. Recently, he was
overwhelmed by a hydraulic cartridge relief valve with high requirements for
machining accuracy and form and position accuracy. He selected a hydraulic
cartridge relief valve manufacturer cooperated for 4 years to make samples. The
samples were made by 3 times, but all failed, and the accuracy was not improved
again and again, but was good and bad. Arvin had to give up this old supplier
and contacted 20 hydraulic cartridge relief valve manufacturers. They either
did not reply or gave up directly.

Arvin found AAK hydraulic valves in B2B and left a message: Can you customize
the hydraulic cartridge relief valve with precise small holes? After
communication, I learned that he was troubled by the difficult machining of
precision small holes of hydraulic cartridge relief valve. According to the
parameter requirements of hydraulic cartridge relief valve, the hardness, wear
resistance, corrosion resistance and surface treatment, all requirements are
very high. After half a day of discussion, AAK technical team came up with the
process plan. I told Arvin that AAK was 90% sure to solve the problem, and the
standard deviation (Sigma) accuracy of size could be stable in different
batches.

2 days later, Arvin asked me to make samples. After 30 days, AAK sent 6
hydraulic cartridge relief valves. 12 days later, Arvin returned a PO for the
hydraulic cartridge relief valve worth 20,000 US dollars.

In order to improve and stabilize the holes accuracy of hydraulic cartridge
relief valve, AAK optimized 3 points:

1. Processing equipment: It is easy to process the hole into a taper hole by
conventional grinding. The Swiss precision lathe is the first choice for
processing the precision small holes of this hydraulic cartridge relief valve.

2. Tool and tool parameters: Six tooth 1201/4.6H7 and 1201/4.8H7 reamers are
used as finishing tools, and the tool tip is grinded to R0.2mm to avoid
penetration.

3. Fixture improvement: In order to ensure the state of precision holes during
semi finishing, AAK uses self-made floating spring chuck to hold the reamer,
avoiding horizontal axial or vertical space errors, which is conducive to
precision and better standard deviation.

AAK hydraulic cartridge relief valve precision small holes, only 3 steps to
ensure quality, welcome to try!

https://www.aakindustry.com/info-detai , l/hydraulic-cartridge-relief-valves-
aak402

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