The thickness of the high-speed press table plate must be designed according to customer requirements. In order to meet the requirements of different rigidity, this paper uses the COSMOSWorks plug-in in Solidworks software to perform modal analysis on the workbench plates of different thicknesses and different materials, and then reverses the stiffness of the workbench from the natural frequency and quality to find the stiffness along with the material. And the law of thickness changes. Based on the analysis, the workbench design and material selection plan that considers stiffness, vibration reduction, and economy are comprehensively considered. The program can meet different rigid requirements. 1 Introduction 2 calculation formula 3 COSMOSWorks Analysis Partially fix the lower plane of the table top (body blanking hole is 450 mm * 305 mm, no constraint), according to the slider bottom plane size, set the length and width dimensions of the mold to 360mm * 300mm, apply 450 in the above area kN load. Set the table plate thickness variation range from 70 to 130 mm, make an analysis at intervals of 5 mm, and take the first-order natural frequency. The calculation results are shown in Table 2. 4 results analysis 5 Conclusion Low Wax Casting,Casting Hardware Tools,Hardwares Casting Service,Stainless Steel Parts Cast Dongying Wanlong Mechanical Mould Co,.Ltd , https://www.wlcasting.com
As an important part of the press, the workbench plays the role of attaching the body and attaching the die. The thickness of the worktable plate directly affects the height of the mold. For the ordinary open press, there is a uniform design standard for the mold mounting height: the standard of the first machine department is JB 1395-74, and the thickness of the worktable plate is basically the same. With the increase in domestic manufacturers of E/I cores and motor stators and rotors in recent years, the demand for high-speed presses is increasing, and domestic forging equipment manufacturers are gradually developing in the field of high-speed presses, and their technological level and market share. Also constantly improving. Since domestic open high-speed presses do not have a uniform parameter standard, the matching mold height dimensions are not uniform. This leads to frequent changes in the thickness of the tabletop when the user is provided with the equipment, and even to modify the relevant dimensions of the fuselage to meet different height requirements of the mold. When the thickness of the platen is reduced, the method of milling the lower plane of the platen is generally adopted, but when the thickness is reduced too much, it is generally necessary to replace the material and re-feed the material. After the thickness of the table plate is reduced, the rigidity of the platen itself will be reduced, and the deformation will be intensified or even damaged when high-speed stamping is performed.
In this paper, the Xuzhou Forging Press Group Co., Ltd. VH45 machine table (Figure 1) is taken as an example to analyze the relationship between the thickness of the platen and the rigidity of the platen. 
Calculating the rigidity of a part directly is more complicated. The natural frequency of the part can be calculated by using the plug-in COSMOSworks in Solidworks software, and then the equation (2) can be obtained by converting (1) to calculate the stiffness k of the part. 
For the sake of convenience, the material of the worktable board is taken as the material of the software: gray cast iron, alloy steel, cast carbon steel, and ordinary carbon steel. The mechanical properties of each material are shown in Table 1. 
The relationship between the first-order natural frequency and stiffness of the table top made of the four materials listed in Table 2 and the variation of the table top thickness is shown in Figure 2 and Figure 3, respectively. It can be seen by combining the two figures and Table 2. :
(1) With the increase in the thickness of the table top, for the above four kinds of materials, the first-order frequency first increases to a certain value and then gradually decreases;
(2) As the thickness of the worktable plate increases, the stiffness of the workbench plate always increases and the magnitude of increase gradually decreases for the above four materials;
(3) When the thickness is the same, the natural frequency and stiffness of the workbench made of alloy steel, cast carbon steel, and ordinary carbon steel have little difference;
(4) The material of the table top is different, and the first-order frequency is different. The greater the elastic modulus of the material, the greater the first-order frequency.
(5) For materials with the same elastic modulus, the first-order frequency increases with the increase of tensile strength;
(6) For the same force way and the same structure of the work table, the thickness corresponding to the maximum of the first-order frequency is almost constant, the corresponding thickness of the platen is 100 mm;
(7) It can be seen from equation (2) that the main factors influencing the stiffness are natural frequency and quality. The platen thickness increases from 70 mm. When the first-order frequency increases to the peak, the frequency can be calculated to increase by about 11%, and the mass increases by nearly 60% relative to the 70-mm thickness. It can be seen that this change In quality, quality plays a big role in stiffness. When the platen thickness increases from the value at the peak frequency to 130 mm, the first-order frequency decreases by approximately 2%, and the mass increases by about 25% relative to the thickness of 110 mm. The platen stiffness is slowly increasing, but the increase is gradually decreasing. 
From the above analysis, it can be seen that for a particular structure of the table plate, the first-order natural frequency has a maximum value when the platen thickness changes, and the first-order natural frequency maximum corresponds to the thickness range for the above four materials. Consistent. Considering the material's vibration-reducing performance, the material of the workbench plate of the open high-speed press is generally selected from gray cast iron; when the platen thickness needs to be greatly reduced in order to adapt to the height of the die plate, the material can be replaced with ordinary carbon steel. Such as Q235A, the platen stiffness can be greatly improved, but also shorten the processing cycle; When you need to reduce the height of the mold platen to a large extent increased the thickness of the platen, the casting platen is prone to casting defects, Influencing the use, a transition pad can be added between the workbench and the fuselage.