The swiss lathe machine is a high -precision, high -efficiency automated machine tool. The use of CNC lathes can improve processing efficiency and create more value. The emergence of CNC lathes makes enterprises get rid of that backward processing technology and swiss CNC lathe processing process Similar to the processing process of ordinary lathes, because the swiss CNC lathe is a one -time fixture, all the car cutting processes are continuously processed, so pay attention to the following aspects.
How to correctly choose these three elements is one of the main contents of metal cutting principles. Metal processing WeChat extracts some points, and the basic principles of selecting these three elements:
To select the main axis to turn every minute, you must first know how much the cutting line speed V should be taken. V choices: depending on the tool materials, workpiece materials, processing conditions, etc.
Knife material:
Hard alloy, V can get higher, generally more than 100 meters/min. Generally, technical parameters are provided when purchasing blades:
How many large line speeds can be selected when processing. High -speed steel: V can only get low, generally not more than 70 meters/min. In most cases, take 20 ~ 30 meters/min.
Workpiece material:
High hardness, V take low; cast iron, V take low, the tool material is 70 ~ 80 meters/minute when the tool material is hard alloy. Low -carbon steel, V can be more than 100 meters/min, non -ferrous metal, V can be higher (100 ~ 200 meters/minute). Stainless steel, stainless steel, V should be lower.
Processing conditions:
Rough machining, V is lower; fine processing, V take higher. The rigid system of machine tools, workpieces, and tools is poor. V takes low. If the S -control program uses S is the main axis of the spindle per minute, then calculates S: S (the spindle of the spindle per minute) = V (cutting line speed)1000/(3.1416workpiece Diameter) If the CNC program uses a constant line speed, S can directly use the cutting line speed v (meter/point).
F mainly depends on the roughness requirements of the workpiece processing. During the processing, the surface requirements are high, and the amount of sword is small: 0.06 ~ 0.12mm/spindle. During rough processing, you can take a bigger. It is mainly determined by the strength of the tool. Generally, it can be above 0.3. When the main corner of the knife is large, the tool strength is poor, and the amount of knife cannot be too large. In addition, the power of the machine tool, the rigidity of the workpiece and the tool. CNC programs use the amount of knife in two units: MM/min, mm/spindle each turn, and the unit used above is MM/spindle every rotation. Turn into the knife*the spindle to turn into number per minute.
When refined, it is generally less than 0.5 (radius value). During rough processing, according to the situation of workpieces, tools, and machine tools, the general small lathe (maximum processing diameter below 400mm) is carried out in the state of front fire, and the depth of the cutting knife in the radius is generally not more than 5mm. In addition, it should be noted that if the main axis of the lathe uses a normal frequency conversion speed, when the spindle speed is low per minute (less than 100 ~ 200 rpm), the output power of the motor will be significantly reduced. At this time The depth and the amount of the knife can only be obtained very small.
