AAK Achieved the High-Precision Hydraulic Valve Sleeve only in Two Proofs

Donald, a hydraulic valve customer from the United States, recently had an
order for hydraulic valve sleeve parts with an old supplier. It took more than
30 days to adjust the approval sample of hydraulic valve sleeve for many times.
The taper of hydraulic valve sleeve always failed to meet the customer
requirement of 0.3-0.5μm. The manufacturer can only give up the order, but
this wastes Donald's time. The trouble is that the customer is still urging the
progress of the modification of the hydraulic valve sleeve. Donald consulted
more than 30 hydraulic valve manufacturers online, but none of them can
guarantee that the taper could reach 0.3-0.5μm. Only 2 manufacturers indicated
that 1-2μm is the limit that they can reach. Donald plans to give up this
hydraulic valve sleeve order, but he doesn't know how to talk to the customer.

While Donald was worried, his colleague Smith gave him the contact information
of AAK HYDRAULIC VALVE. Smith had inquired about the hydraulic valve with AAK
before. Smith directly emailed us the inquiry requirements and the drawings of
the hydraulic valve sleeve, and CC Donald. He asked us to communicate with
Donald directly to see how to solve the taper requirements of the hydraulic
valve sleeve.

After our technical department had a meeting, they found that it was really a
bit tricky. At present, they are not sure to tell the specific accuracy of the
taper of the hydraulic valve sleeve. Except for the taper of the hydraulic
valve sleeve, the straightness and roundness can fully meet the requirements.
We can study the taper of the hydraulic valve sleeve while proofing. However,
the specific parameters still need to be determined until the final samples
come out.

With a try attitude, Donald asked us to start sampling the same day. A week
later, we sent out the samples of the hydraulic valve sleeve. A few days later,
Donald asked by email if we could try again to improve the taper accuracy of
our hydraulic valve sleeve from 0.8-1.2μm to 0.3-0.5μm to meet the customer
requirement. AAK technical department made modification and adjustment for 3
days and 2 nights, and sent the modified sample of hydraulic valve sleeve on
the 4th day. Donald soon informed that the parameters of the second hydraulic
valve sleeve sample of AAK met the requirements. Donald is curious that more
than 30 hydraulic valve manufacturers can't achieve the taper accuracy of
hydraulic valve sleeve. How can AAK achieve it by making samples only in two
times?

As a precision part, the precision of hydraulic valve sleeve is guaranteed by
operators and equipment, especially precision grinding is very important.

For most hydraulic valve manufacturers, the length of the grinder they used is
basically an extended grinder with a hole length of 120%. Although it can
repair and maintain the hole straightness, the accuracy of the hydraulic valve
sleeve can only be controlled at 1-2μm maximum. 3 years ago, AAK adopted a
grinder with a length of about 90% of the hole length, which can reach 0.5μm
taper, but not stable. The taper can only be improved to about 0.5μm until the
cylindrical grinder is explored to replace the extended grinder. Our proofing
master has been groping on the machine for more than 12 years. He has worked
out the process step by step and constantly corrected the operation method to
obtain the fixed process, so as to ensure the 0.3-0.5μm accuracy high
requirements of the hydraulic valve sleeve.

AAK hydraulic valve has been pondering precision and never stopped. You can
also have a small try.

https://www.aakindustry.com/info-detai , l/hydraulic-valve-sleeve-aak132

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