How to extend tool life?

Solution:

1. Appropriate control of cutting force and cutting speed

Appropriate control of the cutting force and cutting speed of the tool is also one of the effective means to reduce the temperature of the machining area and extend the service life of the cutting fluid. In the processing of difficult-to-machine materials, the cutting edge is generally used after fine grinding, and the cutting depth and cutting width should not be too large. When selecting the cutting line speed, it should be considered according to different material types, part structure and processing equipment. In general, if the processing material is nickel-based alloy, the line speed should be controlled at 20 to 50 meters per minute; the processing material is titanium alloy, the line speed should be controlled at 30 to 110 meters per minute; the processing material is PH stainless steel, and the line speed should be controlled within the range of 50 to 120 meters per minute.

2. Choose a reasonable cutting method

For difficult-to-machine materials, the choice of different cutting methods has a great difference in the damage of the cutting fluid. Regardless of the choice of cutting method, the principle is the same, that is, as far as possible to reduce the cutting force, reduce the temperature of the cutting zone. The cycloid cutting method can reduce the cutting area to a large extent, making the actual cutting wrap angle of the cutting fluid smaller, thus prolonging the heat dissipation time of each tooth of the tool and reducing the cutting temperature. The spiral interpolation method can make the cutting amount of each tooth relatively uniform and prevent the cutting force from concentrating on a few teeth and accelerating wear. This effect is obvious at the corner. The large feed cutting method is adopted, the cutting force is effectively reduced by a smaller depth of cut and a larger feed, so that a smaller cutting heat is generated during processing and the temperature of the processing area is lower.

3. Ensure timely and effective chip breaking

In metal processing, there will generally be a lot of cutting heat generated in the cutting chips, if you can control the chip length, to ensure timely and effective chip breaking, you can make this part of the cutting heat is taken away by the chip, so chip breaking is an effective way to control the cutting temperature. When processing difficult-to-machine materials, in the roughing process, under the premise that the rigidity of the processing system allows, it should be as far as possible to produce chip breaking during the entire processing process. At the same time, use the cutting fluid with good settlement performance to discharge the cutting chips, and do not let the cutting chips rub with the surface of the workpiece. When mixed with water, a stable transparent solution is formed. This product has good sedimentation, lubricity, rust resistance, cooling and cleaning. It has strong anti-microbial decomposition ability, and can still maintain its stability under different water hardness conditions, and its service life is more than 5 times that of ordinary emulsified oil.