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Difference between cnc machining and traditional machining

With the continuous development of science and technology, the processing technology has also undergone great changes. The development from conventional machining to CNC machining marks the advancement and perfection of technology. CNC machining and conventional machining have their own characteristics. In this guide, we compare CNC machining with conventional machining from multiple aspects, hoping to provide some valuable references for the improvement and development of machining processes.

What is CNC machining

CNC machining technology is based on traditional machining technology, through the effective combination of CNC technology, computer-aided design and auxiliary manufacturing technology to form CNC machining technology. Compared with the traditional mechanical processing technology, it has greater advantages and has become an indispensable and important processing technology in the modern processing industry.

What is conventional processing

Traditional machining is the experience and technology accumulated by human beings through long-term life and production practice, and it is a processing technology passed down from generation to generation. At present, most of the machine manufacturing technology adopts traditional machining. Its typical feature is to obtain resources from nature and refine them into various engineering materials. Conventional machining is usually a mode from the beginning of machining to the measurement link, and finally to re-machining. To a certain extent, machining techniques are random and have a lot to do with the experience of the operator.

In addition, the conventional machining in modern factories is difficult to adapt to batch operations, it is difficult to form a scale, and the degree of automation is not very high. Most importantly, in the process of product use, pollution problems such as exhaust gas, waste, noise, etc. are still the main factors that damage the environment. Another headache for manufacturers is that once the traditional processing equipment and its parts are damaged, they become waste products and cannot be recycled, which not only causes waste of resources, but also may cause waste pollution, causing trouble to the environment and harming the surrounding residents. life.

Advantages of CNC machining over traditional machining

1. Unmatched accuracy

Many machines can only work efficiently if they provide the required precision. As such, it is an essential quality for many manufacturing processes. The precision of a machine can only be expected when all the individual components are accurately manufactured, and CNC machining can meet this need and ensure high precision in the manufacturing process.

2. Excellent durability

In addition to high precision, CNC machining provides consistent durability. Any well-maintained CNC assembly will work all day.

3. Reduce the reliability of human resources

Often, the manufacturing process is viewed as a large workforce working around machines. CNC technology breaks the stereotype of the manufacturing plant, you don't need many workers to handle a CNC-driven manufacturing environment, skilled operators and programmers can be responsible for many aspects of CNC production operations.

4. Safer and less maintenance

Workers' compensation claims come primarily from manufacturing plants. So, if you want to design a safe work environment in your manufacturing area, incorporate CNC machining into it. It maintains workplace safety effortlessly due to less involvement and errors.

How does CNC machining compare to conventional machining? Let us introduce the difference between CNC machining and traditional machining.

CNC machining VS traditional machining

1. Processing technology

In conventional processing technology, positioning datum, installation method, tool, cutting method, etc. can all be simplified, but CNC processing technology is more complicated, and these factors need to be fully considered. Even if the processing tasks are the same, CNC processing technology can have a variety of solutions. It can process different parts of a workpiece at the same time, and the process has diversified characteristics, which is the difference between CNC machining technology and conventional machining technology.

2. CNC machining fixtures vs conventional fixtures

In CNC machining technology, the fixture and the machine tool need to be fixed, and we also need to coordinate the dimensional relationship between the machine tool and the part coordinate system. In addition, the two steps of positioning and clamping need to be effectively controlled during the machining process. Compared with the conventional processing technology, the processing capacity of the machine tool is limited, and multiple clampings are required during the working process. In this process, special fixtures need to be used, resulting in higher design and manufacturing costs of the fixtures. For the CNC machining process, the instrument can be used for debugging, in most cases no special fixture is required, so the cost is relatively low.

3. Knives

During the machining process, the tool is determined by different machining techniques and machining methods. Especially in computer numerical control machining, the use of high-speed cutting is not only conducive to the improvement of machining efficiency, but also to the improvement of machining quality. It can effectively reduce the probability of cutting deformation, thereby shortening the processing cycle.

At present, there is a dry cutting method, the tool can work without cutting fluid or only a small amount of cutting fluid, so the tool needs to have good heat resistance. Compared with conventional machining technology, computer numerical control machining technology has higher requirements on tool performance.

4. Cutting parameters

In the traditional machining process, the more complex surface and curve operations are prone to errors, so the cutting parameters need to be selected carefully. The CNC machine tool is based on system control and then operates, and all surface processing processes can be controlled on the basis of using programs.

The tool path is more flexible, and more scientific cutting parameters can be set according to actual needs, thereby improving the processing efficiency in an all-round way. Compared with traditional machine tool processing, it has great advantages. At present, rough machining based on high-speed machining has the advantages of high feed rate and high cutting speed, which greatly improves the machining efficiency, reduces the damage degree of the tool to a large extent, and further prolongs the service life of the tool. These are impossible to achieve with conventional machining.

5. Flexibility

Among traditional machine tools, general machine tools have good flexibility but low processing efficiency; special machine tools have high processing efficiency, but the applicable functions of parts are not high. Poor flexibility and high rigidity, it is difficult to adapt to the continuous modification of products in the market, and the competitiveness is weak. For CNC machine tools, as long as the program is changed, new parts can be processed, with good flexibility, automatic operation, high processing efficiency, and can well adapt to the fierce market competition.

6. Quality

When using CNC machining, the degree of automation is high, so special attention should be paid to quality and safety. The machining process should be tested before the process is put into production. Only after meeting the requirements of all aspects of production can it be put into actual production and application. In traditional processing, the above complex process is not required, and the process file can be put into production as a guide for the production line.

Is CNC machining better than traditional machining?

The basic guarantee of CNC machining technology is traditional machining, which is to improve CNC machining on the basis of traditional machining. Although it has certain advanced technology, it still has its own shortcomings. Both CNC machining and conventional machining are instructional documents that guide operators through the step-by-step production of parts into qualified parts.

The quality of the process plan directly affects the production cost and efficiency of the product, so its role in production is very important and indispensable. Only by choosing the correct and reasonable machining can we produce high-precision products, reduce production costs, improve production efficiency, and create good benefits for enterprises.