Shenzhen EMAR Precision Technology Co., Ltd. is a professional manufacturer dedicated to high-precision cnc external processing. The company provides precision machining services for a variety of materials, and its products cover a wide range of industries and fields. Today, EMAR Precision Technology leads you to understand the common types of numerical control machining machines on the market. We mainly analyze the control methods, motion methods and process uses for you. Let‘s take a look together.

　　One: Classification of control methods

　　1, closed-loop control numerical control machine

　　This type of numerical control machine tool with a position detection feedback device, the position detection feedback device uses a linear displacement detection element, which is directly installed on the moving parts of the machine tool, and the measurement results are directly fed back to the numerical control device. Through feedback, the transmission error in the entire mechanical transmission chain from the motor to the moving parts of the machine tool can be eliminated, and finally accurate positioning can be achieved.

　　2, semi-closed loop control numerical control machine

　　Install the detection element at the end of the motor or the end of the lead screw, indirectly detect the displacement of the moving parts by detecting its rotation angle, and then feed it back to the numerical control system. Since most of the mechanical transmission links are not included in the closed-loop loop of the system, relatively stable control characteristics can be obtained. Although its control accuracy is not as good as that of closed-loop control numerical control machine tools, it is more convenient to debug, so it is widely used.

　　3, open loop control numerical control machine

　　This type of machine does not have a position detection feedback device, and usually uses a stepper motor as the actuator. The input data is calculated by the numerical control system, and the pulse command is issued to make the stepper motor turn a step angle, and then converted into a straight line movement of the table through the mechanical transmission mechanism. The moving speed and displacement of the moving parts are determined by the frequency of the input pulse and the number of pulses.

　　Two: Classification of exercise patterns

　　1, linear control numerical control machine

　　In addition to controlling the exact position between the points, the numerical control system should also ensure that the moving trajectory between the two points is a straight line, and the moving speed should also be controlled, also known as point line control. This type of numerical control machine tool mainly includes relatively simple numerical control lathes, numerical control milling machines, numerical control grinding machines, etc. Purely used for linear control numerical control machine tools are rare.

　　2, point control numerical control machine

　　The numerical control system only controls the exact position of the tool from one point to another, not the movement trajectory. The movement between the coordinate axes is unrelated, and the workpiece is not processed during the movement. This type of numerical control machine tool mainly includes CNC drilling machine, numerical control coordinate boring machine, numerical control punch machine, etc.

　　3, contour control numerical control machine

　　The feature of contour control is that it can continuously control the displacement and speed of two or more motion coordinates at the same time. It not only controls the starting and ending coordinates of the moving parts of the machine tool, but also controls the speed, direction and displacement of each point in the entire machining process. Also known as continuous control numerical control machine tools. This type of numerical control machine tools mainly include CNC lathes, numerical control milling machines, numerical control wire cutting machines, machining centers, etc.

　　Three: classification of process uses

　　1. Machining center

　　The machining center is a numerical control machine tool with a tool magazine and an automatic tool changing device. It combines the functions of numerical control milling machine, numerical control boring machine, and numerical control drilling machine. After one clamping, most of the parts can be milled.

　　2, ordinary numerical control machine

　　Ordinary numerical control machine tools generally refer to automated machine tools that realize digital control in a process in the processing process, such as numerical control milling machines, numerical control lathes, numerical control drilling machines, numerical control grinding machines and numerical control gear processing machines. Ordinary numerical control machine tools are not perfect in the degree of automation, and the replacement of tools and the clamping of parts still need to be done manually.

　　Through the above three perspectives, we have learned about the cnc numerical control processing machine tools that are often seen on the market. EMAR Precision Technology provides cnc numerical control centering machine, numerical control cutting machine, turning and milling compound machine and CNC Machining center and other numerical control processing services. The company has more than 100 precision numerical control processing equipment, modern precision machining workshops and testing centers, to provide you with a full range of product solutions, welcome to inquire, visit and discuss cooperation.