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Contact: Manager Liu
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CNC precision machining equipment should attract attention
Published：2019-06-04 Clicks： Times
CNC machining is used in many fields, especially in the machinery industry. What is the process of the CNC machining shop? It is worth considering in this regard, we will discuss them in detail below.
Problems in CNC machining
(1) When the workpiece is too high, it should be divided into rough cuts of different lengths. After use, the knife should be opened and the remaining knives removed.
(2) Cut the plane with fewer ball cutters to reduce machining time; if there is tilt, use a tilt cutter to make integers.
(3) Reasonably set tolerances, balance machining accuracy and calculation time, and reduce multi-step stamping time.
(4) The hardness of the blank is high, and the hardness of the raw material before milling is low. Rough grinding and fine grinding.
(5) The tool material has good toughness and low hardness, which is suitable for rough machining. The tool material has poor toughness and high hardness.
2. CNC machining technology
(1) Fixture method and fixture selection
The clamping method of CNC machine tool parts should also choose a reasonable positioning reference and clamping scheme. The selection of accurate data should follow the principles of “unified data” and “baseline consistency”. In addition to these two principles, they
should also be considered. :
should also be considered. :
Try to machine the surface of the positioning fixture and choose a positioning method that is easy to machine each surface.
When the workpiece is clamped once, all surfaces of the workpiece are machined.
When determining the position of the workpiece on the surface of the table, the effects of machining, tool length and tool stiffness on the machining quality need to be considered.
The fixtures used in the control process should be assembled as much as possible on the common parts and adjusted to shorten the production preparation period.
(2) Processing orders
In order to arrange the processing sequence, we need to follow the basic principles, including "one side and back side", "one thickness" and so on. In addition to these basic principles, we should also follow the following principles:
According to the process of centralized processing, avoid tool reuse and reduce the number and time of tool change.
The pore system has a high degree of concentricity. After one position, the hole system is processed and then the other coordinates of the hole system are processed. This eliminates errors caused by repeated positioning and improves the concentricity of the hole system.
Select and identify prompts and change points, and once determined, they should not be replaced.
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