From the point of view of simplification, because the gear shaft of C6136A lathe feed box is a stepped shaft, it can not be transformed into a plane model by simplification, so it is necessary to establish a three-dimensional geometric model. In the whole structure of C6136A lathe feed box gear shaft, there is deformation in the whole structure of the shaft, so it is necessary to analyze the deformation of each part of the gear shaft. Because the undercut of the gear shaft is small, its influence on the deformation of the whole shaft is ignored, which can reduce the number of units in the subsequent unit division, so as to improve the analysis speed of the software. The geometric model of C6136A gear shaft is established as shown in Figure 1.
The gear shaft is a two support structure, and constraints and forces are added according to the simplified mechanical model. Because the force mainly comes from the rear end, and the rear end support adopts the unloading device, the support section is long, so the x-direction movement constraint and X-direction rotation constraint are added in the front end. After adding, the figure is as shown in Figure 2. In the process of this analysis, the geometric model is built by ug3.0, and the mesh is generated by the software. Based on the factors such as the mesh density set by the software and the calculation accuracy of the software, the gear shaft of the feed box is divided by tetrahedral elements, and the mesh is generated by the intelligent division method of the software. A total of 4434 elements and 885 elements are generated Nodes.
The post-processing technology here is also completed by ug3.0 software. After processing, the maximum deformation of the gear shaft of the feed box outputted by the system is 0.002 617 (mm), and the maximum deformation point of the gear shaft of the feed box is located between the rear support and the auxiliary support of the gear shaft, where the number of teeth z = 90 is installed, as shown in Figure 3. The maximum stress is 38.600 4 MPa through data observation. The maximum stress point is also located between the front support and the auxiliary support. As shown in Figure 3.
According to the analysis of the report, according to the data obtained from the finite element analysis and calculation of the gear shaft of the feed box of C6136A lathe, the gear shaft of the feed box of C6136A lathe has the ability to resist damage and deformation when encountering high load; at the same time, the gear shaft of the feed box of C6136A lathe has the ability to resist damage and deformation The low order modal frequency of the gear shaft of the lathe feed box is higher, which is not easy to cause resonance in the normal operation process, and the amplitude has no effect on the whole processing process, and the rigidity is also ideal.