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Contact: VINSON ZHANG
Company: AAK INDUSTRY CO., LTD
Bona Business Building, No. 456 Taikang Middle Road
Ningbo 315100
China
Phone: 057483008115
Fax: 057488138441
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Date/Time:  8/6/22 12:02 GMT
 

AAK Hydraulic Pressure Reducing Valve angle error of inner cone only 0.06°

Ilona is from a hydraulic equipment company in Turkey. At the beginning of last
year, less than 3 months after joining the company, he needed to purchase a
batch of hydraulic pressure reducing valves for their new hydraulic equipment.
Ilona placed the order with an old supplier of hydraulic pressure reducing
valves that has cooperated for 3 years. After 45 days, the equipment began to
be installed and debugged, but the pressure supply of the equipment was
unstable. The problem lies in the leakage of the hydraulic pressure reducing
valves. The specific problem lies in the error between the angle of the cone in
the valve sleeve and the requirements. The engineer asked Ilona to replace the
hydraulic pressure reducing valves. The manufacturer of the hydraulic pressure
reducing valves said that the error control was already the limit. Ilona
contacted several other hydraulic cartridge valve manufacturers and didn't get
a reply. He was very helpless.

Ilona noticed AAK hydraulic valve online and left a message on AAK website: Can
AAK produce the hydraulic pressure reducing valves with the angle error of ±
0.8 ° of the cone in the valve sleeve? At that time, I felt that it was a
customer with high quality, so I became interested. Ilona also sent the
technical parameter requirements and drawings of the hydraulic pressure
reducing valve. Our technical team was aware of the challenge of this hydraulic
pressure reducing valve. The error of the cone angle in the valve sleeve needs
to be controlled within ± 0.8 °, and the maximum axial grinding tolerance of
the corresponding sealing circle is 7.5μm. These two precision requirements
are difficult for most manufacturers to achieve, but our engineers are
confident.

50 days later, AAK shipped the trial order of 30 hydraulic pressure reducing
valve. Two weeks later, Ilona emailed that AAK hydraulic pressure reducing
valve was installed on their hydraulic equipment. The problem of abnormal
pressure supply had been solved and the equipment operated well. Their
engineers told Ilona that the measurement error of the inner cone angle of AAK
hydraulic pressure reducing valve was only 0.06 °, which was 30% higher than
the standard, and the measurement error of the axial dimension of the sealing
circle reached 2μm. It is 3 times higher than the standard. Their engineers
wanted to know how AAK achieved it?

The reason why AAK hydraulic pressure reducing valves achieved what other
hydraulic cartridge valve manufacturers can't, and the two error standards are
increased by 30% and 3 times, is that AAK control the quality in 3 aspects:
modeling, processing and detection, which most hydraulic cartridge valve
manufacturers can't do.

1. Through the process analysis of the hydraulic pressure reducing valve, our
engineers establish the manufacturing error model to control the change
relationship between the internal cone angle error and the grinding amount,
which is the core of doing a good job of error.

2. GILDEMEISTER turning milling compound machining center is adopted, which can
compensate the errors caused by tool wear and other reasons during the
machining process. At the same time, the double reading head c-axis position
detection technology enables the positioning accuracy of c-axis to reach 5
angular seconds, so as to ensure the minimum error of the conical surface in
the valve sleeve.

3. Then use the special 3 coordinate detection device to quickly measure the
axial dimension of the sealing circle of the valve sleeve, so that the
manufacturing error falls within the control range, and ensure that the inner
cone angle and the axial dimension of the sealing circle of the hydraulic
pressure reducing valve meet the standard.

AAK hydraulic pressure reducing valves, modeling, processing, testing, 3 checks
for accuracy error, you can also have a small try!

https://www.aakindustry.com/info-detai , l/hydraulic-pressure-reducing-valves-
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AAK Hydraulic Pressure Reducing Valve angle error of inner cone only 0.06°
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