cnc machining is the mainstream machining method at present, when we carry out CNC machining, we should not only know what the characteristics of CNC machining are, but also know the steps of CNC machining, so as to better improve the machining efficiency, then what are the steps of CNC machining?1. Analyze the processing drawings and determine the processing process
According to the processing drawing provided by the customer, the process personnel can analyze the shape, dimension accuracy, surface roughness, workpiece material, blank type and heat treatment condition of the parts, and then select the machine tool and cutting tool to determine the positioning clamping device, processing method, processing order and the size of cutting amount.In the process of determining the machining process, the command function of the Cnc Machine tool should be fully considered, and the efficiency of the machine tool should be given full play, so as to make the machining route reasonable, less cutting times and shorter working hours.2. Calculate the coordinate value of the cutter path reasonably
According to the geometric dimensions of the machining parts and the programming coordinate system, the movement trajectory of the center of the cutter route is calculated, and all the data of the cutter position are obtained.General CNC system has the function of linear interpolation and circular interpolation, for relatively simple planar shape parts, such as parts of line and arc contour machining, only need to calculate the geometric elements of starting point and end point, the circular arc of circle (or the circular arc radius), two geometrical element intersection point or tangent point coordinate values.If the nc system has no tool compensation function, the tool center movement trajectory coordinate value should be calculated.For parts with complex shapes (such as parts composed of non-circular curves and surfaces), it is necessary to use a straight line segment (or an arc segment) to approximate the actual curve or surface, and calculate the coordinate value of its nodes according to the required machining accuracy.3. Wrote CNC machining program for parts
According to the parts of the cutter route to calculate the tool trajectory data and has been determined process parameters and auxiliary action, programmers can use the numerical control system in accordance with the functional instructions and program section format, write a part of the processing program.When writing, attention should be paid to: first, the writing of the program is normative, which should be easy to express and communicate;Second, on the basis of fully familiar with the performance and instructions of CNC machine tools, the use of the instructions of the skills, programming skills.
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