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The principle and process characteristics of Dongguan CNC lathe processing

Source: xuyang Browse:327 The release date:2018.06.13 [ Large medium small ]
1. The CNC lathe processing tells you that the machine body of the machine tool body is similar to the traditional machine tool, including spindle transmission, feed transmission, bed, worktable, auxiliary motion device, hydraulic pneumatic system, lubrication system, cooling device, etc. composition. However, great changes have taken place in the overall layout, appearance design, transmission system, tool system structure and operating mechanism of CNC machine tools. The purpose of this change is to meet the requirements of CNC machine tools and give full play to the characteristics of CNC machine tools. .
2. The CNC unit The CNC unit is the core of the CNC machine tool. The CNC unit consists of three parts: input, processing and output of information. The CNC lathe processing tells you that the CNC unit accepts digitized information. After the control software and logic circuits of the numerical control device perform the decoding, interpolation, and logic processing, the various command information is output to the servo system, and the servo system drives the execution unit to feed. movement.
3. Input/Output Device The input device transfers various processing information to the computer's external devices. In the early days of the production of CNC machine tools, the input device was punched paper tape, which has now been eliminated, then developed into a cassette tape, and then developed into portable hardware such as keyboards, disks, etc., which greatly facilitates the information input work, and is now universal DNC network communication serial communication. Way to enter. The output refers to the output internal operating parameters (including the original parameters of the machine under normal, ideal working conditions, fault diagnosis parameters, etc.). Generally, these parameters need to be output for record keeping in the machine just working state. After a certain period of time, the output and original are output. Data for comparison, comparison, can help determine whether the machine tool work is maintained.
4. Dongguan CNC lathe processing tells you that a programmable controller (PC) is a microprocessor-based general-purpose automatic control device designed for use in industrial environments. Since the purpose of the initial development of such a device was to solve the logic and switch control of the production equipment, it was called a Programmable Logic Controller (PLC). When the PLC is used to control the sequential operations of the machine, it can also be called a Programmable Machine Controller (PMC). PLC has become an indispensable control device for CNC machine tools. CNC and PLC coordinate and cooperate to complete the control of CNC machine tools.
5. Measurement feedback device The measurement device is also called feedback element, including grating, rotary encoder, laser range finder, magnetic grid and so on. Usually installed on the table or screw of the machine tool, it converts the actual displacement of the machine table into electrical signals and feeds it back to the CNC device. The CNC device and the command value generate error signals to control the machine to move to eliminate the error. . 2. Working principle When using CNC machine tools, the geometric information and process information of the drawings of the machined parts shall first be written into the machining program with the specified code and format; then the processing program will be input to the numerical control device, according to the requirements of the program, through the CNC system. Information processing, distribution, so that each coordinate moves a number of minimum displacement, to achieve the relative movement of the tool and the workpiece, complete the processing of parts.
The Technological Characteristics of CNC Lathe Processing in Dongguan
CNC lathe machining is a part of machining. There are two main processing methods. One is to fix the turning tool, to process the unshaped workpiece during rotation, and the other is to fix the workpiece and rotate it through the workpiece at a high speed. The horizontal and vertical movements of the tool holder are precision machining.
1, CNC lathe processing easy to ensure the accuracy of the workpiece surface processing; processing, the workpiece around a fixed axis of rotation, each surface has the same axis of rotation, it is easy to ensure the processing surface between the coaxiality requirements;
2, the cutting process is relatively stable; in addition to the intermittent surface, the lathe processing process is continuous in general, unlike milling and planing, in a single pass, the cutter has multiple cuts in and out, resulting in Impact
3, for non-ferrous metal parts finishing; some non-ferrous metal parts, lathe processing is a part of the machining, there are two main forms of processing: one is the fixed tool, processing rotation in the unformed Workpieces, the other is to fix the workpiece, through the high-speed rotation of the workpiece, the vertical and longitudinal movement of the turning tool (head) for precision machining.
1. It is easy to ensure the accuracy of the workpiece processing surface; when processing, the workpiece rotates around a certain fixed axis, each surface has the same axis of rotation, so it is easy to ensure the coaxiality of the processing surface;
2. The cutting process is relatively stable; in addition to the intermittent surface, the lathe machining process is generally performed continuously, unlike milling and planing. In a single pass, the cutting teeth are cut in and out several times to produce impact.
3. Applicable to the finishing of non-ferrous metal parts; Some non-ferrous metal parts, due to the lower hardness of the material itself, good plasticity, with other processing methods is difficult to get a smooth surface;
4. The tool is simple; the turning tool is the simplest one in the tool, easy to manufacture, sharpen and install, which facilitates the selection of a reasonable angle according to the specific processing requirements. The material itself has a lower hardness and better plasticity. It is difficult to obtain a smooth surface with other processing methods.
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label of this article: CNC lathe
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