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Analysis Of Processing Technology Of CNC Machined Parts
Jun 23, 2017

Box parts are mechanical parts in the typical parts, such as lathe bed head box, gear drive box, gearbox, etc., is the machine's basic CNC Machined Parts one of the parts, it will machine and parts of the shaft, bearing, 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, the design of CNC Machined Parts parts

The surface of the box requires a lot of processing surfaces, such as the 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. Therefore, the machining accuracy of the spindle hole (main hole) , The hole processing precision has become a key issue of the process, therefore, in the NC processing of parts routing arrangements 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, the 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, generally the best should be processed plane.

(2) rough, finishing stage to be separated

Box structure is complex, the main surface of the high precision requirements, rough processing of the cutting force,

The clamping force and the cutting heat have a great influence 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 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 the box processing.

(3) CNC Machined Parts of the process of centralized or decentralized decision

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 compared with each other. In the case of medium and small batch production, Concentrated, as far as possible on the same machine.

(4) arrange the appropriate heat treatment process

Casting box structure is complex, uneven wall thickness, casting cooling rate is inconsistent, prone to internal stress, and the surface is hard, therefore, after casting should be reasonable sandblasting,

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