Quality Control for CNC Machining Process
Quality is a key factor in any industry, no exception in CNC machining. In order to meet the requirement of customer’s specifications and avoid any quality problem when products have arrived at the customer’s side, we will use many different kinds of measuring machines and tools to check them in our cnc machining process. Creatingway takes more key points and skills to strictly control our products for global customers.
Several months ago, we received a new customer’s drawings from the medical industry. It is the first time we cooperated with the customer from the medical industry. From the drawing, only tolerance is very high. And we didn’t see any other special requirements from the customer. After the price is confirmed, and all the things are approval, obviously, we got a purchaser order in a short time. But after the samples have arrived at the customer’s side, we were informed by a customer that the samples were rejected due to not match with their measuring tools. After checking and negotiating, we found it is the problem of our measuring tools we used at our side. Even we do a lot to control the quality of your cnc machining process, we still have such a problem coming out. How to improve it? This is a key point that everyone wants to learn and improve.
Below Are How To Control Your CNC Machining Process For The Production
Checking the background of what you are measuring
The different industry has different measuring standard, though sometimes we see the numbers are the same. Just like parts for medical, it should be much more precise. But in other industries, like parts for big machines or something else, the tolerance will be not such that high.
Turning help to quality lab
For some quite special quality requirements, we can turn help to the quality lab. As we know, a factory could not buy all the measuring machines, it will be a large investment. However, sometimes, when a product is out of specification, there is no way to tell where things go wrong in the operation. Then we could take the product to the quality lab to test.
Sufficient communication with customers
Usually, the person who buys the product knows well the function and the testing requirement. So after receiving the inquiry from a customer, we should have sufficient communication with them. Is there any special requirement? What is the part used for? How to inspect them? What measuring tool or machine customer will use?
Clearly understand the drawing and specification for product
Both project engineers and quality engineers have to clearly know and understand for customer’s drawings and requirements, have to check out each of the details tolerance and standard. This is best to work with customers on parts functions and purpose, so we can let our machining engineer how to machining the part, how to control key point, how to ensure high requirement,
For example, we have just got one order for SS316L part with surface finishing to have to mirror polishing, so before we have to work with the customer on this tolerance, since usually, these high polishing tolerance is 0.15mm, after communication with the customer, they told us that this is no problem. Since as usual, we will make most of our parts of tolerance is under +0.02-0.05mm,
Coming back to the customer from the medical industry, finally, we solve the problem and go smoothly in mass production. It is a valuable experience for us. And it brings several new medical industry customers in the following months. We have to work harder to make quality control better and better in the CNC machining process.
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