Even in modern times we have relatively fast 3D printing, but CNC machining is still very common in the rapid prototyping industry. Let's continue reading the article below. 1. CNC Plastic Machining ABS is a very common material choice for CNC milling. It is widely used in top and bottom covers of medical equipment, mobile phone cases, earphone cases, etc. It is not difficult to process ABS, and it is also the cheapest material among plastics. In order to keep costs low to meet the huge project budget, the manufacturer chose to disassemble and process, and then use acetone solvent for bonding. Acetone should only be used in the same or similar thermoplastic bonding. The two parts are placed on the jig and positioned, then the reagent is applied to the interstitial surface. After complete bonding, the agent will slowly diffuse to the bonding surface. The bond gets stronger without gradually weakening. (Strength is better than adhesive) Besides ABS, ABS+PC is also a very common material in plastic CNC machining projects, and it is as easy to process as ABS, and its material cost is only a little higher than ABS, but the milling method is almost the same. After bonding the separated parts together, the bonding line is not very obvious, you can spray some paint on the surface to make it more beautiful. 2. CNC processing of automotive optical prototypes Automotive optical transparent parts processing is a technology that requires constant updating of processing equipment and cutting tools to maintain the highest quality transparent plastic parts in the industry. The ability to machine more complex shapes and optical details can be enhanced by combining five-axis precision milling with diamond machining techniques. Now, diamond tools for machining automotive optical parts have also become a widespread milling method, which can achieve sharper cutting without any post-processing of optical parts. Light guides and mirrors) are milled using smaller tool R0.1 diamond tools. Another difficult machining method in automotive processing projects is 5-axis simultaneous milling. What is 5-axis simultaneous milling? The supporting seat and the milling tool must be rotated at the same time, because most of the time the optically transparent parts will use PMMA as the material, and we all know that PMMA is a fragile material, so when using five-axis simultaneous milling to process parts, there is a risk of parts cracking Higher, easier to happen. 3. CNC machining of high-precision aluminum parts For metals, machining aluminum parts is as common as plastic ABS, many mechanical parts used in automotive machinery and equipment are made of aluminum, and in addition to surface roughness requirements, the accuracy of the holes is strictly controlled limits. Another very important point in high-precision aluminum processing projects is that the designer pays great attention to the surface finish. There are three different measurements (Rz, Rmax and Ra) with the same surface finish across the surface, but each measurement type has three tolerance ranges. The average roughness (Roughness Average Ra) is the arithmetic mean of the absolute value of the roughness profile ordinate. Ra is one of the most effective methods of measuring surface roughness commonly employed in general engineering practice. It does a good job of describing the elevation change on the surface. The unit of Ra is micrometer or microinch. The average roughness depth (Rz) is the arithmetic mean of the individual roughness depths for consecutive sample lengths. The maximum roughness depth (Rmax) is the largest single roughness depth. 4. CNC machining of high hardness steel parts Most CNC manufacturers need to overcome a difficult situation, and that is machining steel parts. As we all know, most of the tools are made of steel, because the tool is made of steel, if the part is made of steel, the hardness of the tool must be higher than that of the material, otherwise it will be easily damaged during processing. This characteristic makes steel parts more difficult to machine than other metal parts, and the result is a shorter tool life, which will also shorten the life of the CNC machine. Because of the above-mentioned disadvantages of milling steel parts, manufacturers usually only plan to use two machines to mill steel parts, which makes the lead time of steel processing projects longer. 5. 4-axis and 5-axis CNC machining Generally, many parts can be finished by 3-axis CNC, but for those parts with details on the sides or undercuts, 4-axis CNC or even 5-axis CNC machines are required to complete.