Tag Archive Computer gong processing surface treatment:

Computer gong processing surface treatment:

  1. In terms of appearance, the machined surface of the parts shall not have obvious defects such as scratches and scratches.
  2. The surface of products processed by CNC lathe must be smooth, beautiful, no burr, no flash, etc
  3. In terms of quality, the machined surface of parts must meet the requirements of corrosion resistance, wear resistance and hardness.

In order to meet the accuracy of parts processing, it must also meet the surface technical requirements and appearance requirements. The parts we process can’t appear to be full of burrs. Here we introduce the surface processing requirements of CNC lathe

  1. In terms of appearance, the machined surface of the parts shall not have obvious defects such as scratches and scratches.
  2. The surface of products processed by CNC lathe must be smooth, beautiful, no burr, no flash, etc
  3. In terms of quality, the machined surface of parts must meet the requirements of corrosion resistance, wear resistance and hardness.
  4. Selection principle of cutting parameters

According to the cutting requirements, first determine the back cutting amount AP, then look up the table to get the feed, and then look up the table to calculate the main cutting speed u through the formula.

In many cases, we can use empirical data to determine the value of these three elements.

  1. Selection method of cutting parameters

Practice has proved that the selection of reasonable cutting parameters is related to many factors such as machine tool, cutting tool, workpiece and technology. The method of reasonable selection of processing amount is as follows:

In rough machining, it is necessary to ensure high production efficiency, so it is necessary to choose a larger back draft a. , larger feed rate,, low cutting speed u is selected.

When finishing, it is mainly to ensure the size and surface accuracy of the parts, so it is necessary to select smaller back feed AP, smaller feed, and higher cutting speed U.

In rough machining, it is necessary to give full play to the potential of NC lathe and the cutting ability of cutting tools. In the semi finish machining and finish machining of CNC lathe factory, how to ensure the machining quality should be considered, and on this basis, the productivity should be improved as much as possible. When selecting the cutting parameters, the CNC lathe factory should ensure that the cutting tool can complete a part or ensure that the durability of the cutting tool is not less than one working shift, at least not less than half a working shift. The specific value of CNC lathe factory should be selected according to the provisions in the machine tool manual, tool durability and practical experience.

(1) It’s a choice to take a knife on your back. The selection of back cutting amount should be determined according to the rigidity of machine tool, fixture, fixture and workpiece as well as the power of machine tool. In the case of the process system allows, as far as possible to choose a larger amount of back knife. In addition to the allowance left for the subsequent process, the rest of the rough machining allowance should be cut off as far as possible to minimize the number of tool runs.

Generally, on medium power machine tools, the back draft of rough machining is 8-10 mm (one side). The back feed of CNC lathe factory is 0.5-5 mm for semi finishing and 0.2-1.5 mm for finishing.

(2) The feed rate is determined. Feed rate refers to the change of tool feed direction in unit time. Numerical control lathe factory moving distance. The principle of determining the feed rate is: when the quality requirements of the workpiece can be guaranteed, in order to improve the productivity, a higher feed rate can be selected. When cutting, turning deep hole or finishing lathe, the CNC lathe factory should choose a lower feed speed. The feed speed should be adapted to the spindle speed and back feed.