What is the purpose of the process analysis before the NC programming begins

Macro process analysis is to say what method to use to manufacture parts, there are many factors involved in consideration, such as keyway, high technical requirements, such as 1 can be used broaching and wire cutting, low technical requirements, can also be used planing, what kind of equipment you have, you will give priority to the selection, there is no outsourcing.

Microscopic, for example, the hole and shape to be machined on the same part, which part to do first, and then microscopic, that is, the tool trajectory analysis when machining the shape, how to cut into the impact line, the shortest and less lifting.

I don't give bounty points, which is considered a help, so as not to waste work experience.

I'll give it all points.

I have been engaged in CNC programming for n years, and I think the purpose of analysis before CNC programming starts is how to choose tools and materials. The most important thing is how to save processing time, save materials, save knives (small knife loss) to achieve qualified products, which is the purpose of the boss.

The purpose of the analysis is to ensure a better processing process.

to improve and improve product quality.

For example, dimensional analysis is to analyze the length. Wide. High.

Dimension datums in each direction, and find out which are the main datums and main dimensions, as well as the annotation form of the dimensions. Technical analysis is based on dimensional tolerances.

Shape for tolerances, surface roughness and other technical requirements to clarify and process the surface.

In order to adopt a reasonable process.

There are many purposes, but also to consider economic factors.

See how you can get the job done.

When you receive a machined part or surface, write out your machining steps.

1) The dimensioning should conform to the characteristics of CNC machining: in CNC programming, the size and position of all points, lines and surfaces are based on the programming origin. Therefore, it is best to give the coordinate size directly on the part drawing, or try to quote the size with the same datum.

2) The conditions of the geometric elements should be complete and accurate: in the programming, the programmer must fully grasp the parameters of the geometric elements that constitute the outline of the part and the relationship between the geometric elements of the geometric elements. Because all the geometric elements of the part contour are defined during automatic programming, and the coordinates of each node are calculated during manual programming, no matter which point is unclear or uncertain, programming cannot be carried out.

However, due to the inconsiderate or neglected design process of the part designer, the parameters are often incomplete or unclear, such as whether the arc and the line, the arc and the arc are tangent or intersect or separate. Therefore, when reviewing and analyzing the drawings, we must carefully calculate and contact the designer in time if we find problems.

3) Reliable positioning datum: In CNC machining, the processing process is often more concentrated, and it is very important to locate with the same datum. Therefore, it is often necessary to set up some auxiliary datums, or add some process bosses to the blank.

4) Unified geometric type and size: It is best to adopt a unified geometric type and size for the shape and inner cavity of the part, which can reduce the number of tool changes, and may also apply control programs or special programs to shorten the program length. The shape of the part is as symmetrical as possible, which is easy to program with the mirror machining function of the CNC machine tool to save programming time.

Answer: The sequence of CNC machining is that the CNC machine tool processes the workpiece through data control according to the pre-programmed CNC program. The CNC program is a series of instructions compiled by the CNC programmer according to the shape, size, and processing requirements of the processed workpiece, which is used to control the machining process of the CNC machine tool.

The preparation of CNC programs requires familiarity with the operation of CNC machine tools, as well as the preparation language of CNC programs, and the preparation of reasonable CNC programs in combination with the shape, size, and processing requirements of the processed workpiece. After the preparation is completed, the CNC program is input to the CNC machine tool, and the CNC machine tool is controlled for processing according to the instructions of the CNC program. Personal Tips:

When compiling the CNC program, it is necessary to be familiar with the operation of the CNC machine tool, as well as the programming language of the CNC program, and combine the shape, size, and processing requirements of the processing workpiece, so as to compile a reasonable CNC program to ensure the processing quality.