What is CNC of machine tool of numerical control of numerical control machine tool it is what meaning

What is CNC of machine tool of numerical control of numerical control machine tool it is what meaning CNC be one kind contains of system of control of Cheng Bai foreword move from Du turn a machine tool. This control system can processing of logistic Zhi ground is had accuse Dao to make encode or the program that other sign instruction sets, and its coding, make machine tool movement machines a spare parts thereby. English abbreviation CNC, it is the abbreviate of English Computerized Numerical Control, call numerical control machine tool, numerical control lathe again, hong Kong is mixed one belt calls Guangdong bead triangle computer gong. Basically use at large-scale treatment spare parts, its machine means to include the circle outside the car, bore hole, car plane is waited a moment. Can write a program, apply to batch production, the automation rate that produces a course is higher. Since since development of American Masschusetts Institute of Technology gave machine tool of the first numerical control 1952, numerical control machine tool is making industry, be in especially car, aerospace, and be applied widely in martial industry, no matter numerical control technology is in hardware and software side, have flying development. The number controls a machine tool (machine tool of numerical control of abbreviation of Numerical Control Machine Tools) , this is a kind of control technology that uses digital computation technology at the machine tool. The number that it turns all sorts of control information in machining process with code shows, input numerical control device through information carrier. Via operation processing issues all sorts of control signal by numerical control device, dominate the action of the machine tool, press the appearance that blueprint asks and dimension, come out spare parts treatment automatically. Better land solved numerical control machine tool the spare parts of complex, nicety, small lot, much breed machines a problem, be a kind flexible, the automation machine tool of tall efficiency, represented contemporary machine tool to control development direction of the technology, it is a kind of typical Electromechanical unifinication product. The compositive: of numerical control machine tool? Qian of Xiao of storehouse of  of ⒒ of deceive of pa of  of  of  of Europe of ⑺ of deceive of pa of cut down of  of ⑹ of Sui of dimple of flood dragon of silk ribbon of こ of commonplace of  of arenaceous  of mallet of chew of  of act of refute of  Tao  pushs straight Qu of Di of brigade of O of deceive of pa of  of Lu  ㄖ to wish beard mallet Buddhist templeput on the brakes is branny be worth act. When machine tool of numerical control of machine program carrier works, do not need a worker to operate a machine tool directly, want to undertake controlling to numerical control machine tool, must weave machine program. In spare parts machine program, parameter of the opposite motion contrail that includes the cutting tool on the machine tool and work, craft (rotate speed of feed main shaft) wait with auxiliary motion. Use spare parts machine program definite pattern and code, memory is on carrier of a kind of program, wait like punched tape, cassette, floppy disk, adopt the input device of numerical control machine tool, input program information CNC unit. 2. Device of numerical control of numerical control unit is the core of numerical control machine tool. Device of contemporary numerical control all uses form of CNC(Computer Numerical Control) , device of this kind of CNC uses many microprocessor commonly, the software form that changes with the program realizes numerical control function, because this calls software numerical control again (Software NC) . CNC system is system of control of a kind of position, it is the athletic contrail that gives ideal according to data-in interpolation, export the part that machines need giving place to executive component next. Accordingly, numerical control unit is main by input, processing and output 3 primary shares are formed. And all these jobs are undertaken be constituented reasonably by the systematic program of the computer, make whole system has the job harmoniously. (1) input device dictates numerical control to the input gives numerical control unit, according to program carrier different, have different input unit accordingly. Direct communication means is inputted and at present basically system of clavier input, disk input, CAD/CAM joins the DNC(of ranking computer is direct numerical control) input, the punched tape that now still many systems still withhold glazed report reader inputs a form. 1) punched tape inputs means. Reader of photoelectricity of usable punched tape reads in part program, direct control machine tool moves, also can read in punched tape content memory, with the part program that stores in memory control machine tool moves. 2) MDI hand moves data to input means. Handlers can use the clavier on operation face plate to input the instruction of machine program, it applies to shorter course. Position compiles in control equipment (below EDIT) , input machine program with software, in the memory that stocks control equipment, method of this kind of input can repeat use process. General and manual process designing all uses this kind of method. On the numerical control unit that has function of conversational process designing, can go up according to monitor the problem of clew, choose different menu, with the method of man-machine interaction, input concerned size number, can create machine program automatically. 3) use DNC direct numerical control to input means. Save part program in ranking computer, CNC fastens unified edge treatment to receive the follow-up block that comes from the computer at the same time. DNC means is multi-purpose the case that makes part program directly at using the intricate work that CAD/CAM software designs. (2) device of information processing input sends treatment message CNC unit, compile computer level-headed information, set according to what control a process by information processing part, after store stage by stage and undertaking handling, give through outputting unit to issue the position and speed statement servo and advocate motion controls a share. The data-in of CNC system includes: The outline information of the spare parts (start, terminal, linear, circular arc) , treatment speed etc assists treatment information (if change switch of knife, gearshift, cooling fluid,wait for) , the purpose of data processing is the preparative work before operation of the interpolation that finish. Data processing program still includes computation of compensation of cutting tool radius, speed and the processing that assist a function to wait. (3) take-off take-off and servo orgnaization connect. Take-off accepts the output pulse of arithmetic unit according to the command of controller, the servo that sends each coordinate it controls a system, through power enlarge, drive servo, control a machine tool to ask to move by the regulation thereby. 3. Servo and the main component that measuring feedback system servo is numerical control machine tool, the feed servo control that is used at realizing numerical control machine tool and main shaft servo are controlled. The action of servo is accept the instruction information that comes from numerical control device, after via power enlarge, plastics is handled, the straight displacement of the lines that is changed into the machine tool to implement a part or angular displacement move. Because servo is the last segment of numerical control machine tool, its function will affect the technical index such as the precision of numerical control machine tool and speed directly, accordingly, logarithm controls the servo actuating device of the machine tool, the requirement has good quick response performance, dog accurate and acutely the digital command signal that numerical control device issues, and can trustily implements the directive that comes from numerical control device, the trends that improves a system follows character and static state dog precision. Servo includes actuating device and actuator two much. Actuating device is comprised by electromotor of servo of main shaft driving unit, feed driving unit and electromotor of main shaft servo, feed. The pace enters electromotor, dc servo electromotor and communication servo electromotor is commonly used actuating device. Measure machine tool of component general numerical control the actual displacement value of each reference axis detects in the numerical control device that come out and inputs a machine tool via feedback system, the actual displacement that comes back to feedback is worth numerical control device to undertake comparative with statement cost, achieve set to be worth needs displacement to measure an instruction to servo output. 4. Lead plane of machine tool of machine tool main body is the main body of numerical control machine tool. It includes box of lathe bed, base, pillar, beam, slide carriage, workbench, main shaft, feed orgnaization, tool carrier and change knife device automatically to wait for mechanical component. It is the mechanical part that completes all sorts of cutting treatment automatically on numerical control machine tool. Compare with traditional machine tool photograph, main body of numerical control machine tool has following structural characteristics: (1) collect appliance to have new structure of tall stiffness, tall aseismatic sex and machine tool of lesser hot metabolic. Spend with the Jing Gang that improves structural system normally, increase the damp, stiffness that adjusts the method such as structural member quality and natural frequency to raise machine tool lead plane and aseismatic sex, make machine tool main body can get used to the need that numerical control machine tool has cutting is machined automatically continuously. Accept improvement composition of machine tool structure, reduce temperature rise of calorific, control to reach adopt the measure such as hot displacement compensation, can reduce heat to be out of shape the influence of pair of machine tool lead plane. (2) use drive of high-powered main shaft servo and feed servo actuating device extensively, make the transmission catenary of numerical control machine tool shortens, simplified the structure of system of transmission of machine tool machinery. (3) use the high drive efficiency, high accuracy, gearing that does not have clearance and athletic part, if nut of ball guide screw is deputy, plastic slideway of sliding slideway, linear scroll, static press slideway to wait. 5. The auxiliary unit of numerical control machine tool assists device is to assure to develop the device of form a complete set with indispensible place of function of numerical control machine tool adequately, commonly used auxiliary unit includes: Device of pneumatic, hydraulic pressure, discharge bit unit, cooling, lubricant device, circumgyrate workbench and numerical control dividing head, defend, all sorts of auxiliary unit such as illume. CNC Milling