The four elements of CNC machining in Shenzhen

The conditions for geometric elements should be complete and accurate

In programming, the programmer must fully grasp the parameters of the geometric elements that make up the contour of the part and the relationship between the geometric elements. Because all the geometric elements of the contour of the part need to be defined during automatic programming, and the coordinates of each node need to be calculated during manual programming, no matter which point is unclear or uncertain, programming cannot be carried out. However, due to the poor consideration or neglect of the part designer in the design process, the parameters are often incomplete or unclear, such as whether the arc and the straight line, the arc and the arc are tangent or intersected or separated. Therefore, when reviewing and analyzing the drawings, be sure to be careful and contact the designer in time if any problems are found

Dimensions should conform to the characteristics of numerical control processing

In numerical control programming, the dimensions and positions of all points, lines, and surfaces are based on the programming origin. Therefore, it is best to give the coordinate dimensions directly on the part drawing, or try to use the same reference to note the dimensions.

Reliable positioning reference

In numerical control machining, the machining process is often concentrated, and it is very important to locate with the same reference. Therefore, it is often necessary to set some auxiliary benchmarks or add some process bosses to the blank.

Uniform type or size

The shape and cavity of the parts are preferably of a uniform geometric type or size, which can reduce the number of tool changes. Control programs or special programs may also be applied to reduce the number of tool changes

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