The purpose of CNC machining and conventional machining is the same, both starting with cutting raw materials made of metal or plastic into parts. However, the most fundamental difference between the two is the automation of CNC and the manual characteristics of conventional machining. Speed, productivity, and accuracy are some of the main advantages of CNC machining over conventional machining.
Skilled workers can cut parts by programming software with CNC. Technically proficient employees can complete all steps by setting up and operating CNC machines. In contrast, skilled operators in manual situations must also set gears, which CNC machining does not use.
The plastic injection molding process involves heating thermoplastic resin pellets, injecting the molten material into hardened steel molds under pressure, cooling and ejecting the part, and then repeating the process.
In contrast, CNC machining is a subtractive process using cutting tools and high-speed rotation to remove materials from larger workpieces to make parts. Since these two manufacturing methods use radically different methods for the actual forming of parts, each choice has its own advantages and considerations.
CNC (Computer Numerical Control) and 3D printing are two leading manufacturing technologies for rapid prototyping and small batch production, but each uses entirely different production techniques to achieve their goals. CNC uses subtraction to eliminate unwanted parts from a material block, while 3D printing uses additive manufacturing to build products layer by layer on a blank block.
Both manufacturing methods have their advantages and disadvantages, and it is difficult to say which one to use in your own project or when. Note that for large-scale production, such as manufacturing more than 200 parts, other manufacturing technologies such as injection molding are more suitable and efficient. We have prepared a detailed comparison of CNC and 3D printing, so you can compare the two methods and decide which one to use.
The CNC machining process originated from traditional machining technology, and is an organic combination of conventional machining technology, computer numerical control technology, computer-aided design, and auxiliary manufacturing technology.
Due to the constant development of technology, more and more parts in modern manufacturing require precision machining, and the accuracy of machining and the complexity of the workpiece's surface are also increasing. Therefore, CNC machining has been widely recognized, but in terms of cost savings, CNC machining is still more expensive than traditional machining.