With the rapid development of the machinery industry and the electronics industry, CNC machine tools, especially vertical machining centers, are widely used. Structural design is related to the rigidity, process, life, cost and many other factors of the vertical machining center. Vertical machining centers usually use two weights, weights and hydraulic weights. The hydraulic weight has the advantages of small structural size, but the cost is high. Therefore, most of the weights are weighted. The support frame used in this way has two structures. In this paper, the two structures are analyzed by the finite element analysis software ANSYS to analyze their advantages and disadvantages, which has certain significance for the structural design of the machining center. 1. Program development The support frame is generally locked on the top surface of the vertical column of the vertical machining center. A certain size hole is opened in front of and behind the support frame to install the shaft, and the deep groove ball bearing, the shaft retaining ring and the sprocket are mounted on the shaft. One end of the chain is connected to the headstock, and the other end is connected to the counterweight, and reciprocates on the front and rear sprocket wheels. The effect diagram and the dimension diagram, scheme 1 are shown in Fig. 1 and Fig. 3 respectively; scheme 2 is shown in Fig. 2 and Fig. 4 respectively. 2. Part analysis Structurally speaking, the weight of the support frame of the first scheme is 41kg, the contact area of ​​the bottom surface is 500mm×80mm=40 000mm 2 , and the method of supporting the shaft end by one side is adopted; while the weight of the support frame of the second scheme is 19kg, and the contact area of ​​the bottom surface is 205mm× 50mm= 10 250mm2, using the method of bilaterally supporting the shaft end. From the technical point of view, the first scheme is better than the second scheme. In addition to ensuring the tolerance accuracy of the two large holes f40mm, it is necessary to ensure the accuracy of the two small holes f25mm. From a mechanical point of view, the second option is better than the one. Under the same load (this support frame is used for 850 vertical machining center, the weight and the headstock are about 5 000N each), the second solution is the support at both ends, and the force is supported by the support holes on both sides, and the second scheme is The bending moment generated by the force is also smaller than that of the first one, so the second scheme is better than the one in the first scheme. For more information, please download the attachment or view Metalworking (Cold Processing), Issue 19, 2013: Makeup Mirror With Lights,Mirror With Led Lights,Light For The Cosmetic Mirror,Mirror With Bathroom Led Light NINGBO EASTKEY ILLUMINATE APPLIANCE CO.,LTD , https://www.eastkeylighting.com