Stainless steel like S304 and S316 are the most common grades of stainless steel used in industry today. Industries such as medical, semiconductor, and food require today’s suppliers to be able to process this rigid material. CNC machining of stainless steel is as much an art as it is a science, and can become a staple for any machine shop trying to survive in this competitive industry. Seicenc has been machining this material, so we know that working with stainless steel is as much an art as it is a science. Our experience is that if you want to master medical device contract manufacturing, you must master the milling and turning skills of stainless steel.
Here are some quick tips that all professional CNC machine shops use:
1. Rigid machines and tools
Stainless steel is an exceptionally hard material. Therefore, it is important that the machines and tools are of high quality and extremely strong and robust. This material can cause chatter in the machine and can cause problems in part machining. The same approach applies to workpiece fixtures, which can easily fail due to vibration during rigorous machining.
2. Choose the right tool material
Some good options exist for CNC machining of stainless steel. High speed steel (HSS), such as tungsten or molybdenum high speed steel. Use of these HSS tool materials depends on hardness, wear resistance and strength. Different levels can be used to optimize the process. When edge chipping is a factor, stronger end mills can be used.
Hardened carbide are another good option. Carbide is an excellent alternative to high speed steel when higher feeds or speeds are required. Using coated carbide tools will help improve wear and reduce breakage.
3. Choice of coolant
It is important to choose a reputable coolant manufacturer who understands the properties of your materials and how they work with their products. Depending on your application, the type of coolant you choose will affect tool wear, feeds and speeds, chip removal, surface finish, heat dissipation and corrosion resistance. The range of coolants includes emulsifiers, mineral oils and air conditioners. Make sure whoever is in charge of the coolants is very familiar with each one to ensure the parts are built correctly.
In conclusion:
Whether you choose a contract manufacturer or machine stainless steel in-house, be sure to respect this special metal. With so many factors that apply to stainless steel, it is imperative to select the correct combination of variables to ensure a perfect part every time. To get a quote from experts in CNC milling and turning of stainless steel parts, please contact us.
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