Difference between BT CNC tool and ordinary tool
January 05, 2022
BT CNC tool is a tool used for cutting in mechanical manufacturing, also known as cutting tool. Cutting tools in a broad sense include both cutting tools and abrasives; At the same time, in addition to the blade for cutting, the "NC tool" also includes accessories such as tool bar and tool handle. It is applied to high-performance and high-precision NC machine tools. In order to achieve stability and good processing efficiency, generally higher requirements are put forward for the design, manufacture and use of NC tools than ordinary tools. The main differences between NC tools and ordinary tools are in the following aspects:
1. Wide application of tool materials
In order to prolong the tool life and improve the tool strength, the tool body materials of many NC tools are made of high-strength alloy steel and heat treated (such as nitriding and other surface treatment), so that they can be suitable for large cutting parameters, and the tool life can be significantly improved (ordinary tools generally use medium carbon steel after quenching and tempering treatment). In the cutting edge materials, CNC cutting tools use more new brands of cemented carbide (fine particles or ultra-fine particles) and superhard cutting tool materials.
2. High precision manufacturing quality
In order to stably process the high-precision part surface, more stringent requirements are put forward for the manufacturing of tools (including tool parts) in terms of accuracy, surface roughness and geometric tolerance than ordinary tools, especially indexable tools. In order to ensure the repeated accuracy of the size of the blade tip (cutting edge) after rotation, the size and accuracy of key parts such as tool body, groove and positioning parts The surface roughness must be strictly guaranteed. At the same time, in order to facilitate the tool setting and dimension measurement of the tool in the tool setting instrument, the machining accuracy of the base surface should also be guaranteed.
3. Reasonable selection of chip breaking groove
The cutting tools used in NC machine tools have strict requirements for chip breaking groove. During machining, if the tool keeps chipping, the machine tool cannot work normally (some CNC machine tools and cutting are carried out in a closed state). Therefore, regardless of CNC lathe, milling, drilling or boring machine, the blade selects a reasonable chip breaking groove type for different machining materials and processes, so that stable chip breaking can be obtained during cutting.
4. Optimization of tool structure
The advanced tool structure can greatly improve the cutting efficiency. For example, the structure of high-speed steel NC milling tools has mostly adopted the wave edge and large spiral angle structure, while the cemented carbide indexable tools adopt the internal cooling, blade vertical installation, module replaceable and adjustable structure, while the internal cooling structure is not applicable to ordinary machine tools.
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January 05, 2022
