The so-called dimensional accuracy mainly refers to the degree to which the size of the workpiece after the processing of parts is consistent with the size requirements of the drawing. Therefore, if you want to improve the dimensional accuracy of parts during CNC machine tool operations, you need to pay attention to the operations during CNC machine tool operations. Techniques, common control methods for the dimensional accuracy of parts, such as accurate tool setting, adjustment of tool wear compensation, and modifying the dimensional control accuracy in the program, so that the size of the produced workpiece can be accurate.
- 1. CNC lathe crawling occurs
The main reason why the equipment crawls is that the carriage guide rails are severely worn, and the screw balls are worn or loose. Solution: Pay attention to the maintenance work of CNC lathes on a daily basis. After the work is completed, you should clean the iron wire and add lubricating oil in time to reduce friction. - 2. The CNC lathe appears to resonate and is not placed smoothly.You need to choose a location with stable ground to place the CNC lathe. Pay attention to adjusting the angle and fixing it smoothly.
- 3. Poor processing technology
Choose a coolant suitable for workpiece processing, and if it can meet the processing requirements of other processes, use a higher spindle speed as much as possible, so that the processed parts will be particularly smooth. - 4. The tip of the tool is damaged or the tool is not sharp.
If a tool becomes worn or damaged and becomes less sharp, it needs to be resharpened or a better tool needs to be resharpened. - 5. The speed of rapid positioning is too fast, and the motor and drive cannot respond, resulting in unstable processing dimensions.
If the rapid positioning speed is fast, then the speed, cutting return speed and time need to be appropriately adjusted so that the driver and motor can operate normally at the rated operating frequency. - 6. The carriage maintains high-speed movement for a long time, resulting in wear of the screw and bearings.
You can use a dial indicator to lean against the bottom of the tool holder and edit a certain fixed cycle program through the system to check the repetitive positioning accuracy of the carriage of the CNC lathe equipment, adjust the gap between the screw rods, and replace the bearings.