Due to the CNC machine tool has the characteristics of high machining precision, high machining efficiency, concentrated machining process, short clamping time of parts and so on, higher requirements are put forward for the use of CNC tools.
In terms of tool performance, CNC tools should be higher than those used in ordinary machine tools.
When choosing CNC tools, first of all, standard tools should be used as the main tools. And according to the need, choose a variety of efficient composite tools and special tools. When selecting standard CNC tools, various advanced tools should be selected as far as possible according to the actual situation (such as indexable tools, solid carbide tools, ceramic tools, etc.).
When selecting CNC machine tools to handle cutting tools, the following aspects must also be considered:
1. Models, specifications and accuracy levels of CNC tools.
The type, specification and precision grade of NC tool should meet the machining requirements, and the tool material should be compatible with the workpiece material.
2. good cutting performance.
In order to adapt to rough machining and machine processing, can use large back cut and high feed, can withstand high speed cutting and strong cutting performance. At the same time, the cutting performance and tool life of the same batch must be stable in order to change the tool life according to the difference in tool life, or manage tool life through the numerical control system.
3. High precision.
In order to meet the requirements of high precision NC machining and automatic tool replacement, high precision is needed, such as the radial dimensional accuracy of some solid end mills.
4. High reliability.
Tools and accessories must be reliable and fit for purpose to ensure that tools are not accidentally damaged and that there are no potential defects in CNC machining.
5. High durability.
The tools used in CNC machining have higher durability in rough and finish machining than those used in normal machine tool machining.
6. Good chip breaking and chip removal performance.
CNC machining, chip breakage and chip removal is not like ordinary machine tool processing can be handled manually in a timely manner, chips are easy to wrap around the tool and workpiece, will damage the tool and scratch the surface of the workpiece has been processed, and even injuries and equipment accidents, affecting the quality of machining and machine tool safety, so the tool is required to have a better chip breakage and chip removal performance.
With the wide application of CNC machine tools in production practice and the formation of quantitative production lines, CNC programming has become one of the key issues in CNC machining. In the process of CNC programming, the tool should be selected instantly under the state of human-computer interaction. Therefore, programmers must be familiar with the selection method and the determination principle of cutting amount, so as to ensure the processing quality and processing efficiency of parts, give full play to the advantages of CNC machine tools, and improve the economic benefits and production level of enterprises.
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