Reasonable tool selection and optimized machining methods are very important for improving machining efficiency and prolonging tool life, especially when machining difficult-to-machine material aerospace parts. A high-quality hard-to-machine material tool must have an ultra-fine grain tool base, sharp cutting angles, strong cutting edges, and a heat-resistant surface coating.
First, adequate cooling, proper line speeds, effective chip breaking, and a reasonable tool wrap angle are very effective for controlling tip temperature. For CNC machines and knives that have internal cooling at the same time, the inner cooling function that is most conducive to cooling should be used as much as possible so that a powerful high-pressure water stream can carry away a large amount of cutting heat and ensure that the processing area remains within a certain temperature range. Even if there is no internal cooling function of the machining equipment, it is recommended to use external cooling internal tool shank, while increasing the cooling pressure and improve the cooling effect.
Secondly, controlling the cutting force and cutting speed of the tool properly is also one of the most effective methods to reduce the temperature in the processing area and prolong the tool life. Generally, the hard-to-machine materials are generally made of finely-ground tool edges, smaller depths of cut, and cutting widths. According to different difficult-to-machine materials, parts structure and processing equipment and other factors, it is very important to choose a reasonable cutting speed. Nickel-based alloys should normally be controlled at 20 to 50 m/min, titanium alloys at 30 to 110 m/min, and PH stainless steel at 50 to 120 m/min.
Third, for the same machine tools and parts, the processing of difficult-to-machine materials can greatly affect the machining efficiency and tool life of the tools. Whether it is the use of cycloidal machining, spiral interpolation, or large feed milling, the goal is to reduce cutting forces and reduce cutting zone temperatures. Cycloid cutting method can minimize the cutting area, making the tool's actual cutting angle minimum, extending the heat dissipation time of each tooth of the tool; helical interpolation makes the amount of each tooth relatively uniform, especially at the corners, the most obvious; For the cutting method, the cutting force is effectively reduced with a small depth of cut and a large feed, so that a minimum cutting heat is generated in the processing, and the temperature in the processing area is the lowest.
Fourth, it is an effective way to control temperature rise by ensuring that machining is interrupted. In metal processing, a large amount of cutting heat is generally generated on the chips, and effective chip breaking causes the large amount of cutting heat generated in the machining to be carried away by the chips. Normally, we don't want long chips during processing. More attention should be paid to the processing of difficult-to-machine materials, especially for rough-machining processes. When the rigidity of the entire machining system is allowed, chip-breaking should be performed as much as possible during the entire machining process. The swarf is thinned and the swarf shape is "9", "6", or "C".
Fifth, maintain an appropriate effective tool wrap angle during processing so that each effective tool tooth of the tool can maximize the maximum cooling time. Maintaining an appropriate and reasonable tool effective wrap angle during processing is very beneficial for improving the cutting efficiency of difficult-to-machine materials and prolonging the tool processing life. It is extremely important for machining difficult-to-machine material parts. The tool effective wrap angle, which is reflected in the cutting parameters, has a direct relationship with the depth of cut Ap, the cutting width Ae, and the tool diameter Dc. Especially when processing difficult-to-machine materials, full-knife cutting should be avoided as much as possible. In actual machining, the tool life is reduced by approximately 30% for each doubling of the cutting wrap angle of the tool.
In short, difficult-to-machine material parts must have high hardness, high strength, high toughness, and high wear resistance. For new difficult-to-machine materials with these characteristics, they have poor machinability, are difficult to process, have low processing efficiency, and have high tooling costs. . As a result, difficult-to-machine material parts place higher demands on machining tools.
First, adequate cooling, proper line speeds, effective chip breaking, and a reasonable tool wrap angle are very effective for controlling tip temperature. For CNC machines and knives that have internal cooling at the same time, the inner cooling function that is most conducive to cooling should be used as much as possible so that a powerful high-pressure water stream can carry away a large amount of cutting heat and ensure that the processing area remains within a certain temperature range. Even if there is no internal cooling function of the machining equipment, it is recommended to use external cooling internal tool shank, while increasing the cooling pressure and improve the cooling effect.
Secondly, controlling the cutting force and cutting speed of the tool properly is also one of the most effective methods to reduce the temperature in the processing area and prolong the tool life. Generally, the hard-to-machine materials are generally made of finely-ground tool edges, smaller depths of cut, and cutting widths. According to different difficult-to-machine materials, parts structure and processing equipment and other factors, it is very important to choose a reasonable cutting speed. Nickel-based alloys should normally be controlled at 20 to 50 m/min, titanium alloys at 30 to 110 m/min, and PH stainless steel at 50 to 120 m/min.
Third, for the same machine tools and parts, the processing of difficult-to-machine materials can greatly affect the machining efficiency and tool life of the tools. Whether it is the use of cycloidal machining, spiral interpolation, or large feed milling, the goal is to reduce cutting forces and reduce cutting zone temperatures. Cycloid cutting method can minimize the cutting area, making the tool's actual cutting angle minimum, extending the heat dissipation time of each tooth of the tool; helical interpolation makes the amount of each tooth relatively uniform, especially at the corners, the most obvious; For the cutting method, the cutting force is effectively reduced with a small depth of cut and a large feed, so that a minimum cutting heat is generated in the processing, and the temperature in the processing area is the lowest.
Fourth, it is an effective way to control temperature rise by ensuring that machining is interrupted. In metal processing, a large amount of cutting heat is generally generated on the chips, and effective chip breaking causes the large amount of cutting heat generated in the machining to be carried away by the chips. Normally, we don't want long chips during processing. More attention should be paid to the processing of difficult-to-machine materials, especially for rough-machining processes. When the rigidity of the entire machining system is allowed, chip-breaking should be performed as much as possible during the entire machining process. The swarf is thinned and the swarf shape is "9", "6", or "C".
Fifth, maintain an appropriate effective tool wrap angle during processing so that each effective tool tooth of the tool can maximize the maximum cooling time. Maintaining an appropriate and reasonable tool effective wrap angle during processing is very beneficial for improving the cutting efficiency of difficult-to-machine materials and prolonging the tool processing life. It is extremely important for machining difficult-to-machine material parts. The tool effective wrap angle, which is reflected in the cutting parameters, has a direct relationship with the depth of cut Ap, the cutting width Ae, and the tool diameter Dc. Especially when processing difficult-to-machine materials, full-knife cutting should be avoided as much as possible. In actual machining, the tool life is reduced by approximately 30% for each doubling of the cutting wrap angle of the tool.
In short, difficult-to-machine material parts must have high hardness, high strength, high toughness, and high wear resistance. For new difficult-to-machine materials with these characteristics, they have poor machinability, are difficult to process, have low processing efficiency, and have high tooling costs. . As a result, difficult-to-machine material parts place higher demands on machining tools.
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Aluminum Die Casting Electrical Tool Parts are lightweight alloys that have good corrosion resistance, mechanical properties, high thermal and electrical conductivity and strength at high temperatures. Aluminum alloys possess high dimensional stability for complex shapes and thin walls.
Aluminum Die Casting Electrical Tool Parts
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