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Three steps of CNC Machining，The step process of CNC machining also obeys the cutting law of machining, which is roughly the same as the processing technology of ordinary machine tools. Because it is an automatic processing that applies computer control technology to mechanical processing, it has the characteristics of high processing efficiency and high precision, and the processing technology has its own unique features, the process is more complex, and the work step arrangement is more detailed and thorough.
The step process of CNC machining includes the selection of tools, the determination of cutting parameters and the design of the tool route. The step process of CNC machining is the foundation and core of CNC programming, and only reasonable technology can compile high-efficiency and high-quality CNC programs. The criteria for measuring the quality of the NC program are: the least machining time, the smallest tool loss and the workpiece that produces the best results. So what are the steps of CNC machining?
CNC machined spare parts
First, analyze the processing drawings and determine the CNC machining process:
According to the processing drawings provided by the customer, the process personnel can analyze the shape, dimensional accuracy, surface roughness, workpiece material, blank type and heat treatment status of the part, and then select the machine tool and tool to determine the positioning clamping device, processing method, processing sequence and cutting amount. In the process of determining the machining process, the command function of the CNC machine tool used should be fully considered, and the efficiency of the machine tool should be fully exerted, so as to achieve reasonable processing routes, less tool passes and short processing hours.
Second, reasonably calculate the coordinate value of the CNC machining toolpath trajectory:
According to the geometric size of the machined parts and the programmed coordinate system set, the motion trajectory of the center of the tool route is calculated to obtain all the tool position data. The general CNC system has the function of linear interpolation and circular arc interpolation, for the contour processing of planar parts with relatively simple shapes (such as parts composed of straight lines and arcs), only need to calculate the beginning and end of the geometric element, the center of the arc (or the radius of the arc), the coordinate value of the intersection or tangent point of the two geometric elements. If the NC system does not have tool compensation, the coordinate value of the motion trajectory in the center of the tool is calculated. For parts with complex shapes (such as parts composed of non-circular curves and surfaces), it is necessary to use straight segments (or circular arc segments) to approximate the actual curve or surface, and calculate the coordinate values of their nodes according to the required machining accuracy.
Third, write parts CNC machining program:
According to the tool route of the part to calculate the tool motion trajectory data and the determined process parameters and auxiliary actions, the programmer can write the processing program of the part section by section according to the functional instructions and program segment format specified by the CNC system used. When writing, attention should be paid to: first, the standardization of program writing, which should be easy to express and communicate; Second, on the basis of full familiarity with the performance and instructions of the CNC machine tools used, the skills used by each instruction and the skills of program section writing.The steps and processes of CNC machining are generally divided into rough machining, medium and rough corner cleaning, semi-finishing and finishing. Only we know the steps of CNC machining, so as to better improve the efficiency of CNC machining. In machining,
In order to enable process personnel to reasonably choose threading methods in processing, improve production efficiency and avoid quality accidents.
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