Stamping is a processing method for forming the required shape and size of stamping parts by exerting external force on plate, strip, pipe and profile by press and die to produce plastic deformation or separation. A large number of stamping parts such as automobiles, instruments and meters, household appliances, bicycles, office machines, living utensils and so on. Below is a brief introduction to the design of CNC punching machine.
First, the design principle of numerical control program
The design method of numerical control program has two kinds of manual programming and automatic programming. No matter manual programming or automatic programming, the numerical control program produced should have clear program structure, standard statement, good readability and strong modifiable. Especially for single piece small batch numerical control production, it may be necessary to modify and adjust the program at any time in the machine tool control cabinet. The readability and modifiable of the program are particularly important.
Two. Select the appropriate programming base
In most cases, the base point of the CNC punch press is based on the original point of the machine tool, but sometimes the programming base point outside the original point can greatly reduce the numerical calculation in the program design, reduce the program section and the programming workload, increase the readability and modifiable program, and reduce the errors in the program design. The programming base points can be selected at any part of the part or machine tool, but must be related to the positioning datum of the parts.
Three. Choose the proper order of changing the mold and the path of the knife
When designing CNC punching machine, we should choose a reasonable order of replacement, usually with a circular hole, a rear hole, a big hole after the hole, and a shape after the center. In order to shorten the processing time, at the same time, a set of molds should be selected after all the holes needed to be processed on this part. In order to reasonably select the die changing sequence, we should also select the tool path and ensure the safe and reliable operation of the machine.
Four. The reasonable position of the clamp and the way of displacement
CNC punch press every clamp positioning has a certain range of processing, when exceeding this range, we must clamp the shift to complete the rest of the processing. When the gripper is shifted, the sheet material is pressed by the pressing block first, and the clamp is moved to the base position, and then clamped and continued to process.
Five, reasonable way of discharging
For CNC punching of small and medium-sized parts, typesetting process is usually used to improve the utilization ratio of materials. The process of typesetting can achieve a reasonable route and a reasonable replacement order. At the same time, the auxiliary processing time is shortened and the processing time is saved.
Six. Centralized design of stamping process
In the machining programming of CNC punching machine, the principle of centralized design should be followed, that is, to complete the machining of all types of holes and shape of the CNC machine tool in one time, so as to prevent the occurrence of repeated positioning error. This can give full play to the advantages of CNC machine tools, improve production efficiency and ensure machining quality. For some parts that must be relocated, the method of repeated positioning should be considered fully, and in the case of repeated positioning, the holes with related dimensions should be done as far as possible in a machining location.
Chongyachejianb
The above is the attention to the process design of CNC punch press, good programming habits and clear design ideas, the selection of reliable raw materials and good performance equipment is the key to improve the technological level
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