What are the techniques for selecting cutting quantities for inclined bed CNC lathes?
The movement of the CNC spindle of the precision CNC machine tool is transmitted to the tool rest through the hanging wheel frame, feed box, and slide box, and the longitudinal and transverse feed movements are completed. The inclined bed CNC lathe uses a servo motor, which is transmitted to the slide plate and tool rest through the ball screw to complete the z-direction (longitudinal) and vertical (transverse) feed movements. CNC lathes also have the function of processing various threads. The kinematic relationship between the spindle rotation and the tool holder movement is controlled by the CNC system. The CNC lathe spindle box is equipped with a pulse encoder, and the movement of the spindle is transmitted to the pulse encoder through the synchronous toothed belt Precision CNC Milling Brass Fixtures And Jig tool.
When the spindle rotates, the pulse encoder sends a detection pulse signal to the CNC system, so that the rotation of the spindle motor and the cutting feed of the tool holder maintain the motion required for thread processing. That is, when the thread processing is completed, the spindle rotates once, and the tool holder Move the workpiece one lead in the z direction. The precision CNC machine tool CNC is composed of the spindle box, tool holder, feed transmission system, bed, hydraulic system, cooling system, lubrication system and other parts. Only the feed system of the CNC lathe and the feed system of the horizontal lathe are planned There are fundamental differences.
Selection of cutting amount for inclined bed CNC lathe:
Practice has proved that the selection of reasonable cutting amount is related to many factors such as machine tools, cutting tools, workpieces and Precision Wire Cutting Plastic Injection Mould Core processes. The method to reasonably select the processing dosage is as follows:
When roughing, it is mainly necessary to ensure high production efficiency, so a larger back cutting amount a, a larger feed amount, and a medium to low cutting speed U should be selected.
When finishing, the size and surface accuracy requirements of the parts are mainly ensured, so a smaller back cutting amount ap, a smaller feed amount, and a higher cutting speed U are selected.
When roughing, it is generally necessary to give full play to the potential of the CNC lathe and the cutting ability of the tool. When semi-finishing and finishing machining in CNC lathe factories, they should focus on how to ensure the processing quality and try to improve productivity on this basis. When selecting the cutting amount, the inclined bed CNC lathe factory should ensure that the tool can process one part or ensure that the tool’s durability is not less than one working shift, or at least no less than half a working shift. The specific values of the CNC lathe factory should be selected based on the regulations in the machine tool manual, tool durability and practical experience.
Selection of back cutting amount: The selection of back cutting amount should be determined based on the stiffness of the machine tool, CNC Milling Automotive Audio Amplifier Base and workpiece, as well as the power of the machine tool. If the process system allows, choose a larger back cutting amount as much as possible. Except for the allowance left for subsequent processes, the rest of the rough machining allowance should be removed at one time as much as possible to reduce the number of tool passes.
Usually on medium-power machine tools, the back cutting amount for rough machining is 8-10 mm (single side). The back cutting amount for semi-finishing in a CNC lathe factory is 0.5-5 mm; the back cutting amount for finishing is 0 2-1.5 mm.
Determination of feed amount: Feed amount refers to the feed direction of the tool in unit time. The distance moved by the inclined bed CNC lathe factory and the principle of determining the feed speed are that when the quality requirements of the workpiece can be guaranteed, in order to improve productivity, a higher feed speed can be selected. When cutting, turning deep holes or finishing turning in a CNC lathe factory, a lower feed speed should be selected. The feed speed should be compatible with the spindle speed and the amount of back tool engagement. During rough machining, the choice of feed rate is limited by the cutting force.