What are the key points of using CNC lathe?
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What are the key points of using CNC lathe?

  1. Reasonable selection of cutting dosage
      For efficient metal cutting, the material to be machined, the cutting tool and the cutting conditions are the three main elements. These determine the processing time, tool life and processing quality. Cost-effective processing is necessarily a reasonable choice of cutting conditions.
     The three elements of cutting conditions: cutting speed, feed and depth of cut directly cause damage to the tool. With an increase in cutting speed, the tool tip temperature rises and mechanical, chemical and thermal wear occurs. A 20% increase in cutting speed will reduce tool life by 1/2.
     The relationship between feed conditions and wear behind the tool arises in a very small range. However, with high feeds, cutting temperature rises and back wear is high. It has a smaller effect on the tool than cutting speed. The impact of depth of cut on the tool is not as great as the cutting speed and feed, but in the tiny depth of cut cutting, the material being cut produces hardened layer, which also affects the life of the tool.
     Users should select the cutting speed to be used according to the material to be machined, hardness, cutting condition, material type, feed, depth of cut, etc.
     The most suitable machining conditions are selected on the basis of these factors. A regular and stable wear to reach the life is the ideal condition.
     However, in actual operation, the selection of tool life is related to tool wear, variation in dimensions being machined, surface quality, cutting noise, machining heat, etc. When determining the machining conditions, a study based on the actual situation is required. For difficult-to-machine materials such as stainless steel and heat-resistant alloys, coolant can be used or a good rigid cutting edge can be selected.
  2. Reasonable selection of tools
      1. When rough turning, choose a tool with high strength and good durability in order to meet the requirements of large back draft and large feed during rough turning.
     2. When finishing turning, choose the tool with high precision and good durability to ensure the requirements of machining accuracy.
     3. In order to reduce the tool changing time and facilitate tool setting, machine chucked tools and machine chucked inserts should be used as much as possible.
  3. Reasonable selection of fixtures
      1. try to use general-purpose fixtures to clamp the workpiece, avoid using special fixtures.
      2. Part positioning reference overlap, in order to reduce positioning errors.
  4. determine the processing route
      Machining route refers to the CNC machine tool machining process, the tool relative to the trajectory and direction of movement of the part.
      1. should be able to ensure machining accuracy and surface roughness requirements.
     2. should be as short as possible to shorten the machining route, reduce the tool empty travel time.
  5. the link between the machining route and the machining allowance
      At present, under the condition that the CNC lathe has not yet reached popular use, the excessive margin on the blank, especially the margin containing forging and casting hard skin layer, should generally be arranged to be processed on the ordinary lathe. If you must use CNC lathe to process, you need to pay attention to the flexible arrangement of the program.
  6. The main points of fixture installation
      At present, the connection between the hydraulic chuck and hydraulic clamping cylinder is realized by the drawbar. The key points of hydraulic chuck clamping are as follows: first, remove the nut on the hydraulic cylinder with a moving hand, remove the drawtube and withdraw it from the back end of the spindle, then remove the chuck fixing screw with a moving hand, and the chuck can be removed.

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