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How Has CNC Machining Changed Manufacturing?
What are the benefits of CNC machining?
Numerical control machining is a kind of process method for machining parts on CNC machine tools. CNC machine tool machining and traditional machine tool processing are generally consistent, but significant changes have occurred too. As a machining method that control part and tool displacement with digital information, it is an effective way to solve the problems of varied parts, low volume CNC machining, complex shapes, high precision and achieve efficient and automated processing.
What are CNC machines and how do they work?
CNC machining refers to the processing carried out by the control system to issue instructions to make the tool meet the requirements of various movements, and to represent the technical requirements and processing process requirements such as the shape and size of the workpiece in the form of numbers and letters.
CNC machine tool is a kind of machine tool controlled by a computer. The computers used to control the machine tool, whether it is a special computer, or a general computer, are collectively referred to as numerical control systems. The movement and auxiliary action of the CNC machine are controlled by the instructions issued by the CNC system. The instructions of the CNC system are compiled by the programmer according to the material of the workpiece, the machining requirements, the characteristics of the machine tool and the instruction format (CNC language or symbol) specified by the system. The numerical control system sends out operation or final information to the servo device and other functional components according to the program instructions to control the various movements of the machine tool. When the machining program of the part ends, the machine automatically stops. Any kind of CNC machine tool, if there is no input program instructions in its CNC system, can not work. The controlled action of the machine tool roughly includes the starting and stopping of the machine tool; Spindle start-stop, rotation direction and speed change; The direction, speed and mode of feed movement; Tool selection, compensation of length and radius; Tool change, coolant opening, closing, etc.
CNC machining procedure of operation
CNC programming
CNC machining programming methods are divided into manual (manmade) programming and automatic programming. Manual programming, the entire content of the program is manually written in the format of the instructions specified by the numerical control system. Automatic programming, namely computer programming, can be divided into automatic programming methods based on language and painting. However, no matter what kind of automatic programming method is used, it is necessary to have the corresponding hardware and software.
Advantages of low volume CNC machining
In order to improve the degree of production automation, shorten the programming time and reduce the cost of CNC machining, a series of advanced CNC machining technologies have also been developed and used in the aerospace industry such as computer numerical control, that is, the use of small or microcomputers to replace the controller in the numerical control system, and the use of software stored in the computer to perform calculation and control functions. This soft connection of the computer numerical control system is gradually replacing the initial state of the numerical control system. Direct CNC is to use a computer to directly control multiple CNC machine tools, which is very suitable for the production of low volume CNC machining of aircraft and short cycles. The ideal control system is an adaptive control system that can continuously change the processing parameters. Although the system itself is very complex and expensive, it can improve the processing efficiency and quality.
