1, Overview of SFM for Aluminum
SFM, Surface feet per minute is an expression of cutting speed, which describes the distance the cutting tool moves along the surface of the workpiece per unit time. For materials like aluminum, The selection of SFM is closely related to various factors such as aluminum hardness, cutting depth, tool material and geometry, and coolant usage. A reasonable SFM setting can ensure the smooth progress of the cutting process, improve machining efficiency, and ensure machining quality and tool life.
2, Factors affecting the SFM value of aluminum
Hardness of aluminum: Aluminum materials of different grades and heat treatment states have different hardness. Aluminum with lower hardness can withstand higher cutting speeds, while aluminum with higher hardness needs to reduce the cutting speed appropriately.
Cutting depth: The greater the cutting depth, the greater the cutting force and the higher the cutting temperature. Therefore, in cases of deep cutting, it is necessary to appropriately reduce the SFM value to reduce cutting force and cutting heat.
Tool material and geometry: The material and geometry of the tool have a significant impact on cutting speed. Hard alloy cutting tools have high hardness and wear resistance, making them suitable for high-speed cutting; High speed steel cutting tools are suitable for cutting at lower speeds. In addition, the geometric shape of the cutting tool (such as front angle, back angle, edge radius, etc.) also affects the cutting speed and cutting effect.
Cooling liquid usage: Cooling liquid can effectively reduce the temperature of the cutting area, reduce tool wear and workpiece deformation. When using coolant, the SFM value can be appropriately increased to improve processing efficiency.
3, Suggestion for selecting SFM values for aluminum
Reference tool manufacturer's recommended values: Tool manufacturers usually provide recommended SFM ranges based on the performance of tool materials and aluminum materials. In actual processing, you can first refer to these recommended values for setting.
Conduct cutting tests: Before formal machining, cutting tests can be conducted to observe the changes in cutting process, cutting force and cutting heat, as well as the quality of the machined surface. Through experiments, SFM values can be gradually adjusted to find the most suitable cutting speed.
Considering machining quality and efficiency: When selecting SFM values, it is necessary to comprehensively consider machining quality and efficiency. Excessive SFM values may lead to excessive cutting force and cutting heat, thereby affecting machining quality and tool life; A low SFM value may reduce processing efficiency. Therefore, it is necessary to seek a balance point in practical applications.
Safety precautions: When adjusting SFM values, safety precautions need to be taken into account. Excessive SFM values may lead to excessive cutting force and cutting heat, resulting in safety accidents such as tool breakage and workpiece flying out. Therefore, caution is necessary when adjusting the SFM value to ensure the safety of the machining process.
