CNC Machining Services, The advantages and disadvantages of numerical control machining-Nanjing Precision Engineering Co., ltd

by:NJPE     2020-01-12

Numerical control precision machining is a kind of technology, which is widely used in the mechanical industry.  And at the same time, many CNC Machining Services has come. It refers to the technological process of machining parts on numerical control machine tools. In numerical control processing, numerical control machine tools, numerical control systems, etc.  will be used.  Numerical control machine tools are Machine tools controlled by computers, the instructions of the numerical control system are a set of instructions compiled by programmers according to the material of workpieces, processing requirements, characteristics of machine tools and the instruction format specified by the system. 

1. Advantages and disadvantages of CNC Machining Services :(1) The number of tooling is greatly reduced, and complicated tooling is not required for processing parts with complex shapes. If you want to change the shape and size of the parts, you only need to modify the parts processing program, which is suitable for the development and modification of new products. (2) The processing quality is stable, the processing precision is high, the repetition precision is high, and the processing requirements of the aircraft are met. (3) In the case of multi-variety and small batch production, the production efficiency is relatively high, which can reduce the time of production preparation, machine tool adjustment and process inspection, and reduce the cutting time due to the use of the best cutting amount. (4) It can process complex profiles that are difficult to process by conventional methods, and even process some processing parts that cannot be observed. Disadvantages: machine tools and equipment are expensive and require maintenance personnel to have a high level. 2. CNC Machining Services process (1) Dimensions should conform to the characteristics of numerical control precision machining.  In numerical control programming, the dimensions and positions of all points, lines and surfaces are based on the programming origin. Therefore, it is best to give the coordinate size directly on the part drawing, or try to use the same reference to draw the size. (2) The conditions of geometric elements should be complete and accurate.  In the process of programming, programmers must fully grasp the parameters of geometric elements that constitute the outline of parts and the relationships between geometric elements, because all geometric elements of the part profile should be defined during automatic programming, and the coordinates of each node should be calculated during manual programming, no matter which point is unclear or uncertain, programming cannot be carried out. However, due to improper consideration or neglect by part designers in the design process, incomplete or unclear parameters often occur, such as arc and line, ARC and arc are tangent or intersect or separated. Therefore, when reviewing and analyzing drawings, we must be careful and contact the designers in time when problems are found. (3) Reliable positioning Benchmark in numerical control machining, the machining process is often concentrated, and positioning with the same benchmark is very important. Therefore, it is often necessary to set some auxiliary benchmarks or add some process bosses to the blank. (4) Uniform geometric type or size it is better to adopt uniform geometric type or size for the appearance and inner cavity of parts, which can reduce the number of tool changes, and may also apply control programs or special programs to shorten the program length. The shape of the parts is as symmetrical as possible, which is convenient to program by using the mirror direction processing function of the numerical control machine tool to save programming time. 3. The principle of sequence arrangement of CNC Machining Services (1) The processing of the previous process cannot affect the positioning and clamping of the next process. (2) First inside and then outside, that is, the internal cavity is processed first, and then the shape is processed. (3) The process of machining with the same installation or using the same cutter is best carried out continuously. (4) In the same installation, the process that has less influence on the rigidity of the workpiece should be carried out first. 
It is beyond doubt that benefits CNC Machining Services. Market sentiments are strong, especially in the light of growing cnc aluminum observed globally.
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