What does NC machining mean?

Question 1: What does NC machining mean? This is a kind of machining. This is a new processing technology. The main work is to compile the processing program, that is, to convert the original manual work into computer programming. Of course, you need to have experience in manual handling.

It's not manual work, it's technical work. If you study well, your salary will be good. If you can open your own small processing factory, the profit will be very rich. I know a couple, that's it, very rich. Of course, you must have a certain initial investment to buy CNC equipment.

Question 2: What does NC machining mean? CNC (Numerical Control Machine Tool) is the abbreviation of computer numerical control machine tool, which is an automatic machine tool controlled by program. The control system can logically process the program specified by the control code or other symbolic instructions, and decode it through the computer, so that the machine tool can perform the specified action, and the blank material can be processed into semi-finished parts through tool cutting.

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Compared with ordinary machine tools, CNC machine tools have the following characteristics: ● High machining accuracy and stable machining quality; ● Multi-coordinate linkage can be carried out to process parts with complex shapes; ● When machining parts change, it is generally only necessary to change the numerical control program, which can save production preparation time; ● The machine tool itself has high precision and rigidity, and can choose favorable processing dosage and high productivity (generally 3~5 times that of ordinary machine tools); The machine tool has a high degree of automation, which can reduce labor intensity; Low mass production, product quality is easy to control; Low quality requirements for operators and high technical requirements for maintenance personnel.

Question 3: What does a CNC machining center mean? CNC machining center is a kind of CNC machine tool with tool magazine, which can automatically change tools and perform various machining operations on workpieces within a certain range. The characteristics of machining parts in machining center are as follows: after the machined parts are clamped once, the CNC system can control the machine tool to automatically select and replace tools according to different processes; Automatically change the auxiliary functions such as spindle speed, feed speed of machine tool, and the movement track of cutter relative to workpiece, and continuously and automatically perform multi-process machining such as drilling, reaming, reaming, boring, tapping and milling on each machining surface of workpiece. Because the machining center can automatically complete a variety of processes, it can avoid human errors, reduce the time of workpiece clamping, measuring and machine tool adjustment, as well as the time of workpiece turnover, handling and storage, and greatly improve the machining efficiency and accuracy, so it has good economic benefits. Machining center can be divided into vertical machining center and horizontal machining center according to the position of spindle in space.

Question 4: What does NC machining mean? The concept of numerical control (CNC), also known as computer gong or CNC machine tool, is actually a name of Hong Kong. Later, it was introduced to the Pearl River Delta in Chinese mainland, and it was actually a CNC milling machine. In Jiangsu and Zhejiang, it is called "machining center", which is an automatic machine tool with program control system. The control system can logically process and decode the program with control codes or other symbolic instructions, so as to make the machine tool move and process parts. NC machining refers to machining with NC machining tools. CNC refers to programming and controlling CNC machine tools with CNC machining language (usually G code). G code language used for NC machining tells CNC machine tools which Cartesian position coordinates to use, and controls the feed speed and spindle speed of the cutter, as well as the functions of cutter converter and coolant. Numerical control machining has great advantages over manual machining, such as the parts produced by numerical control machining are very accurate and repeatable; CNC machining can produce parts with complex shapes that cannot be finished by manual machining. CNC machining technology has been widely used, and most machining workshops have CNC machining capabilities. The most common NC machining methods in typical workshops are NC milling, NC turning and EDM wire cutting. Tools used for CNC milling are called CNC milling machines or CNC machining centers. Lathe used for NC turning is called NC turning center. The G-code of NC machining can be programmed manually, but it is usually the workshop that automatically reads CAD (Computer Aided Design) files with CAM (Computer Aided Manufacturing) software and generates G-code programs to control NC machine tools.

Question 5: What does numerical control mean? Numerical control refers to digital control. In layman's terms, it is to turn our language into a computer language, describe the graphics you want to the computer, and accomplish what you want through the machine.

Question 6: What is the significance of centering in NC machining? Centering is to find out the datum coordinates of the workpiece by centering the rod. Such as the center point of a square row or circle.

Question 7: What do you mean by CNC machine tools? Thank you in detail. As the name implies, "CNC" is digital control. Because it is a derivative of the development of computer technology, we usually call it computer digital control technology. Up to now, the leading force of social development is industry, and the vanguard force of industrial development is automatic control technology. The birth of numerical control technology marks the high realization of industrial production automation control, especially in machinery manufacturing industry, such as mechanical processing and manufacturing, IT engineering, medical equipment control, construction engineering control, aerospace and national defense industry. Broadly speaking, the application principle of numerical control technology in these aspects is the same, that is, the digital signal communication of the computer is used to control and coordinate the work of each executive element, but the specific control method varies with the controlled object and the realized function. Of course, the most typical application field of CNC technology is CNC machine tool processing. Nowadays, CNC machining has become the core content of modern manufacturing industry, so we take CNC technology as an example to illustrate it.

CNC machine tools usually include CNC lathes, CNC turning centers, CNC milling machines, machining centers, CNC punching machines, CNC wire cutting machines, CNC EDM machines and other common machine tools according to their machining functions. Among them, CNC turning center is developed from CNC lathe, and the difference between them is that CNC turning center has all the functions of CNC lathe, and it also has a set of power tool system, that is, a C axis with drilling and milling function is added on the basis of X axis and Z axis, thus adding special machining functions such as precise drilling and tapping on cylindrical surface and milling spiral groove. Machining center is developed from CNC milling machine. The main difference between them is that the machining center has one more tool changing system than the CNC milling machine. Through its unique tool changing mechanism, the machining tool on the spindle can be changed quickly and reliably, and the multi-process centralized machining of workpiece such as drilling, milling, reaming, boring and tapping can be realized. In addition, some machining centers have added automatic turntable, automatic loading and unloading mechanism and coordinate measuring mechanism, further expanding the machining function and improving the degree of automation.

The structure of CNC machine tools can be roughly divided into:

(1) input and output devices (including display screen, system editing panel, RS232 interface, Ethernet interface, 1 10v external power interface, etc.). )

(2) Computer digital control devices (including CNC system CPU, PLC programmable logic controller, system bus, software memory, system external equipment interface, etc.). )

(3) Servo drive module (including servo driver and servo motor of spindle and feed shaft, etc.). )

(4) Mechanical transmission mechanism (including spindle assembly, ball screw transmission assembly, tool magazine tool rest mechanism assembly, etc. )

(5) Auxiliary mechanism devices (including cooling, chip removal and lubrication system mechanisms, workbench and hydraulic and pneumatic clamping mechanisms, lighting and alarm devices, speed and position detection devices, switches and buttons for machine tool operation modes, etc.). )

(6) Machine body device (including machine base, bed saddle or column, protective door cover, etc.). )

(7) Power supply system devices (including electrical switches, servo transformers and voltage regulators, etc.). )

Machining principle of CNC machine tools;

Numerical control machine tool is an automatic processing equipment integrating computer technology, electronic and electrical technology and mechanical technology, with high technical content and expensive cost. Naturally, there are high technical requirements for operators. Compared with traditional machining, the technical core and difficulty of NC machining is no longer machining operation, but machining process programming and machining parameters compilation, which is also determined by the characteristics of NC machining. Generally speaking, CNC machining is divided into the following links:

(1) Analyze the part drawings and determine the processing technology;

(2) According to the size of the part and the actual clamping situation, the coordinate parameters of each base point and node of the contour line of the part are determined by mathematical calculation or with the help of relevant software;

(3) According to the machining process and coordinate parameters, an accurate machining program is woven by using the instruction code suitable for the machine tool, and the machining program is stored in the machine tool through the system editing panel button or special data transmission function;

(4) Start the spindle, control the cutter to touch or try to cut the clamped workpiece from each coordinate axis direction according to the process requirements, and set various cutter parameters through calculation;

(5) Machining the first part, debugging the machine tool according to the measurement results, automatically machining after modifying the program or tool parameters, and then measuring again, and so on until qualified parts are machined.

Remarks: The first, second and third steps mentioned above can be completed by special CAD\CAM automatic programming software.

Working principle of CNC machine tools;

Numerical control machine tool is a processing machine tool controlled by a special industrial control computer. Naturally, every movement of the machine tool is controlled by the numerical control system ... >; & gt

Question 8: What is numerical control? 1. Numerical control (NC for short) technology refers to the technology that uses digital instructions composed of numbers, characters and symbols to control the actions of one or more mechanical devices. Numerical control generally uses general or special computers to realize digital program control, so numerical control is also called computerized numerical control (CNC for short), which is generally called CNC abroad, and the concept of NC is rarely used again.

2. It usually controls mechanical quantities such as position, angle and speed, as well as switching quantities related to the direction of mechanical energy flow. The appearance of numerical control depends on the appearance of data carrier and binary field data operation. 1908, perforated metal foil interchangeable data carrier came out; At the end of 19, a control system with paper as data carrier and auxiliary functions was invented. During the period of 1938, Shannon carried out fast data calculation and transmission at MIT, which laid the foundation for modern computers including computer numerical control system. Numerical control technology is closely combined with machine tool control and developed.

3. CNC engraving machine

Question 9: What is CNC machining technology? (I want the concept) What is its main content? This is my opinion.

There is no main concept, and the processing technology is very broad.

NC machining process refers to the machining procedure of parts.

For example, the first program will cut off the hypersurface chamfer.

The second step is to pull out the cylindrical plane part,

Third-order Tao Liyan

That's all.

Maybe that's what it means.

Question 10: What does numerical control do? Numerical control machine tools are developed on ordinary machine tools, and numerical control is numerical control.