Contact Person : ZHANG
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October 11, 2023
The direct cause of tool damage is cutting force and cutting heat. Therefore, no matter which processing method is used, the fundamental purpose is to minimize the temperature of the tool tip of the cutting part and the processed area of the part, and prevent the surface hardening of the processed part. And the tool tip temperature is too high, increase the heat dissipation area and control the cutting force. In order to extend the service life of the tool, it is necessary to reasonably select the type of metal processing cutting fluid and optimize the processing method.
1. Properly control cutting force and cutting speed
Appropriate control of the cutting force and cutting speed of the tool is one of the most effective means to reduce the temperature of the processing area and extend the service life of the cutting fluid. When processing difficult-to-machine materials, finely ground tool edges are generally used, and the cutting depth and cutting width should not be too large. When selecting the cutting line speed, factors such as different material types, part structures, and processing equipment should be considered. Generally speaking, if the processing material is nickel-based alloy, the line speed should be controlled at 20 to 50 meters per minute; if the processing material is titanium alloy, the line speed should be controlled at 30 to 110 meters per minute.
2. Choose a reasonable cutting method
For difficult-to-machine materials, choosing different cutting methods will have great differences in the damage caused by the cutting fluid. Using the trochoidal cutting method can minimize the cutting area and minimize the actual cutting angle of the cutting fluid, thereby extending the heat dissipation time of each tooth of the tool and reducing the cutting temperature; using the spiral interpolation method can make the cutting amount of each tooth relatively uniform. , to avoid the cutting force being concentrated on a few teeth and accelerating wear. This effect is most obvious especially at the corners; and the large feed cutting method is used to effectively reduce the cutting depth with a smaller depth of cut and a larger feed. force, so that the minimum cutting heat is generated during processing and the temperature of the processing area is the lowest.
3. Ensure timely and effective chip breaking
In metal processing, a large amount of cutting heat is generally generated on the cutting chips. If the chip length can be controlled to ensure timely and effective chip breaking, this part of the cutting heat can be taken away by the chips. Therefore, chip breaking is the key to controlling the cutting temperature. An effective way. At the same time, use cutting fluid with good settling performance to settle and discharge the cutting chips, and do not let the cutting chips rub with the surface of the workpiece.