I have designed and built a pneumatic valve (current quantity four) with a G2 cast iron body and spool made of S7(Rc 50) with lapped 45* seats and a land width of .125". It is used to control a circuit handling 250 psi for a valve gated hot runner. I have built a fixture to grind the seats concentric with the spool and have lapped the seats by hand but it is somewhat time consuming and if this design proves durable (prototype ran over two million cycles) the company I work for may wish to manufacturer a fair quantity of them.
How do engine manufacturers lap seats on a production basis?
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Functional prototypes are a key step in product development â€“ they give engineers a chance to test new ideas and designs while also revealing how the product will stand up to real-world use. And when it comes to functional prototypes, 3D printing is rewriting the rules of whatâ€™s possible. Download Now
The company turned to the Studio System to allow for faster retooling on manufacturing lines, speed the development and prototyping of custom parts and to quickly and inexpensively produce maintenance, repair and operations (MRO) parts to keep manufacturing lines up and running. Download Now
The Desktop Metal Studio System allows John Zink Hamworthy Combustion engineers to rapidly create prototypes, design and test innovative new part designs, and streamline their workflows. Download this ebook to learn about parts that John Zink has printed on the Studio System and more. Download Now
In this white paper, learn the step-by-step method for forming sheet metal parts with 3D printed plastic dies to reduce costs and lead time. Sheet metal forming is the most cost-effective forming procedure today for manufacturing parts at large quantities. Download Now