Analysis of Processing Technology of cnc Lathe Parts

Box parts are typical parts of mechanical parts, such as lathe headbox, gearbox, gearbox, etc., is one of the basic parts of the machine, it will machine and parts ofthe shaft, bearings, sets and gears And other parts to maintain the correct mutual position, and in accordance with the pre-designed transmission relationship to coordinate their mutual movement, combined into a whole. The assembled box parts are mounted on the machine with the design datum of the box. Therefore, the processing quality of the box not only affects its assembly precision and movement precision, but also has a decisive influence on the working precision, service performance and life of the machine.
First, CNC lathe processing process design
The surface of the box requires a lot of processing surfaces, such as lathe bedside box, gearbox, etc. In these machined surfaces, the machining accuracy of the plane is easier to ensure than the machining accuracy of the hole, so the machining accuracy of the spindle hole (main hole) in the box , The hole processing precision has become a key issue of the process, therefore, in the process of arrangement I tend to pay attention to a few points.
(1) the front of the hole after the processing sequence
The first processing plane, not only cut off the rough surface of the uneven surface of the surface sand and other traps, more importantly, in the processing of the distribution of holes in the plane, crossed, easy to find, and when the boring tool began to boring, Not because of the face of the rugged and produce shock and vibration, damage to the tool, therefore, it is generally best to first process the plane.
(2) rough, finishing stage to separate the complex structure of the box, the main surface of the high precision, CNC lathe processing rough processing of the cutting force,
The clamping force and the cutting heat have a great effect on the machining accuracy. If the roughness is immediately finished, the internal stress of the workpiece deformation due to various causes after roughing is not fully released and can not be carried out during finishing To eliminate the resulting deformation of the box after unloading, affecting the final accuracy of the box, I think in the rough process, it is best to release the fixture several times, so that the timely release of internal stress as much as possible, more To ensure the quality of processing box.
(3) CNC lathe processing process centralized or decentralized decision
In the case of small and medium-sized production, in order to reduce the number of machine tools and fixtures used, and to reduce the number of handling and installation of the box, the rough and finishing stages can be made relatively large, and the finishing and finishing stages are separated from each other. Concentrated, as far as possible on the same machine.