We often find that the appearance of aluminum alloy appearance parts processed by CNC is very poor, and the most direct phenomenon is:

1. Material line
2. Machining knife pattern
3. Surface scratch
4. Oxide sand hole
5. poor color difference
6. Size out of tolerance

This kind of defect seriously affects the delivery time and cost of suppliers, so how can we control the yield in reality?

1. Material line: the appearance requirements of the needle are high. CNC machining aluminum alloy appearance parts, that is, the customer requires that the sandblasting is more than 180 mesh. These kinds of the part are most likely to cause this kind of defect because of the problem of raw materials. This is mainly caused by the reason of the profile factory. Specifically, it is caused by impure materials, the addition of secondary materials, the wrong extrusion method of the extrusion mold, and the insufficient pressure of the extrusion machine of the extrusion factory, As a professional appearance parts CNC processing aluminum alloy parts processing factory, it will test the materials before each batch, and will verify and evaluate the defects in a small batch. At the same time, it is also important to find a professional supplier who has made similar profiles, to effectively prevent such defects;

2. Processing knife marks: this phenomenon has a lot to do with the processing technology and the master's technology, especially the parts connected by the needle and the surface. The place where the knife is connected is a test of the master's experience. We directly consider the problem from the knife path and the forming knife, and optimizing the process more reasonably can effectively reduce the occurrence of such defects;

3. Surface scratch: the clamping method and fixture directly affect this reason. The rationality of the fixture during clamping and the convenience of the staff during taking and placing are all factors to be considered. Only by taking this factor to the extreme, and using a blister box or pearl as the packaging method, can we effectively prevent it;

4. Oxide blisters: we mainly found that the cleanliness of the packaging method is to keep the processed parts clean and remove the oil stains on the surface. We must pay attention to the number of times when the packaging cotton is recycled. Here, we must pay special attention to that the storage time in the oxidation plant cannot exceed three days, because the acid and salt value of the environment in the oxidation plant is too high, and the surface of the parts will be corroded for a long time, resulting in the appearance of blisters. Other reasons are caused by the oxidation process;

5. Bad color difference: this kind of phenomenon is the most complex one. Many reasons affect this. The pressure and method of sandblasting and the time of over-salting are very critical. We usually play Jiugongge to control the color and color system. There is a direct relationship between toner and color cylinder, and the time of sealing holes. Controlling the parameters of these processes within a standard is the beginning of doing a good job in color management and improving the yield;

6. Size out of tolerance: for precision CNC machining aluminum alloy parts, if you want to control the size tolerance within the range of 0.01mm, it is also a test of the control of the detailed rules. The process of cleaning and degreasing is very critical. Poor surfaces here will lead to water stains. If the size is too acid-base, it will be out of tolerance. Secondly, sandblasting pressure is also very critical. After these two processes are well controlled, the fine size will not be out of tolerance.