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1. The difference between NC milling machine and machining center:
machining center is a NC machine with automatic exchange device, which can continuously process a variety of processes. It is developed from CNC milling machine

the biggest difference with CNC milling machine is that the machining center has the ability to exchange processing tools automatically. By installing different tools on the tool magazine, it can exchange processing tools automatically in one clamping. By installing different tools on the tool magazine, it can change the processing tools on the spindle through the automatic tool changing device in one clamping, Realize a variety of processing functions< In addition, CNC milling machine has only three axes, while machining center can be four or five axes, which is more widely used than CNC milling machine
conclusion: there are some differences between CNC milling machine and machining center in performance, application and price, but they have their own characteristics. The most important thing is to choose the machine tool suitable for you<

brief introction to machining center
machining center uses CNC control system to generate digital signals to drive milling machine mechanism to do precision machining
the structure of the machining center is that the z-axis is the tool spindle rotation, the workpiece moves in XY plane, and the milling is carried out from top to bottom. For a few or a large number of proction, the machining center can process economically. Its advantages are that the circular milling cutter is cost-effective, the metal cutting rate is high, and the multi blade cutting can be carried out in a very short time
the main projects of machining center technology include plane milling, surface milling, groove milling, gear milling, cam milling, etc., and the complex contour can be milled at one time by using the forming milling cutter, which is an indispensable tool for mechanical proction, mold proction or tool proction.

2. MC is a NC machine tool with tool magazine and automatic tool changing device. It combines the functions of NC milling machine, NC boring machine and NC drilling machine, and has powerful functions. CNC milling machine has no tool magazine and automatic tool changing device, nor boring machine and drilling machine function
CNC milling machine has five elements: CNC system, detection device, driving device, transmission chain of machine tool and servo motor, but ordinary milling machine does not have these five elements, so the operation and detection all need to be carried out step by step manually.

3. Men who have the idea of pregnancy need to do some reproctive system examination. First of all, they need to do a semen routine analysis to understand the quality of sperm, and then they need to do color Doppler ultrasound of reproctive system, including prostate, seminal vesicle, testis and epididymis. Also need to know whether there is varicocele phenomenon, but also need to be clear through color Doppler examination. And the examination of external genitalia, including rendant prepuce, phimosis, testicular development problems and whether the penis is concealed. These are generally understood by doctors through palpation. If there is any abnormality, it can be further confirmed by auxiliary examination.

4. Just go to the hospital

5. Unknown_Error

6. CNC machine tool is the abbreviation of digital control machine tool. It is an automatic machine tool with program control system. The control system can logically process and decode the program with control code or other symbolic instructions, so that the machine can move and process parts. Compared with ordinary machine tools, CNC machine tools have the following characteristics: ● high machining accuracy and stable machining quality; It can carry out multi coordinate linkage and process complex parts; When the machining parts are changed, generally only the NC program needs to be changed, which can save the proction preparation time; The machine tool itself has high precision and high rigidity, and can select favorable processing amount, with high proctivity (generally 3-5 times of that of ordinary machine tool); High degree of automation of machine tool can rece labor intensity; Higher requirements for the quality of operators and higher technical requirements for maintenance personnel. CNC machine tools are generally composed of the following parts: ● host, which is the theme of CNC machine tools, including machine body, column, spindle, feed mechanism and other mechanical parts. It is used to complete all kinds of cutting machine parts. The numerical control device is the core of the numerical control machine tool, including hardware (printed circuit board, CRT display, key box, paper tape reader, etc.) and corresponding software, which is used to input the digital part program, complete the input information storage, data transformation, interpolation operation and realize various control functions. Drive device, which is the driving component of the actuator of CNC machine tool, including spindle drive unit, feed unit, spindle motor and feed motor, etc. Under the control of the numerical control device, he realizes the spindle and feed drive through the electric or electro-hydraulic servo system. When several feed linkage, can complete the positioning, straight line, plane curve and space curve processing. Auxiliary device, some necessary supporting parts of index control machine tool, to ensure the operation of CNC machine tool, such as cooling, chip removal, lubrication, lighting, monitoring, etc. It includes hydraulic and pneumatic device, chip removal device, exchange table, numerical control turntable, numerical control dividing head, cutting tool, monitoring and detection device, etc. Programming and other auxiliary equipment can be used to program and store parts outside the machine. Since MIT developed the first CNC machine tool in the world in 1952, CNC machine tools have been widely used in manufacturing instry, especially in automobile, aerospace and military instry. CNC technology has developed rapidly both in hardware and software. Machining center machining center is a highly automatic multi-function CNC machine tool with tool magazine and automatic tool changing device. After the workpiece is clamped on the machining center once, it can complete a variety of processes for more than two surfaces, and has a variety of tool changing or tool selection functions, so that the proction efficiency is greatly improved. Machining centers can be divided into boring milling and turning according to their processing proceres, and can be divided into three axis, four axis and five axis machining centers according to the number of control axes.

7. The doctor will tell you what to check, pay more attention to nutrition, let it be

8. The machining center has tool magazine and tool changing system, but the CNC milling machine has no tool magazine.

9.

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