Design Analysis of Axial Stiffness of Two-bearing End Face Grinding Machine Spindle

The design analysis of the axial stiffness of the two-bearing end face grinding machine spindle, the former Institute of Technology M50007; Li, Jiang Shi, please Wang Min calculation.

Axial stiffness and optimum parameters of the transmission force in the middle of the support 1. Simplified model transmission force of the spindle component, in the middle of the support, the mechanical model is set here, 8; coplanar.

The total displacement caused by 1 is the displacement caused by the elastic bearing caused by the elastic bearing. The total displacement caused by the elastic spindle is the position caused by the elastic principal axis under the force of the force. Spindle section moment of inertia, 1; 1 spindle equivalent diameter, 1 = displacement caused by elastic support deformation 4, the total displacement caused by force is the force from the entry point to the axis, so that the thrust bearing is generated under the force The total displacement of the shaft end is always thought! = In order to eliminate the influence of force, we use the flexibility parameter to analyze, from the former 1 = ship, the command into = 3, then the total flexibility is the system, the choice is small, and the choice of 1 and More free, so we are mainly design and the best value.

When a person takes a ternary function of vinegar and sputum, and when it is a certain value, the value of 1 is required for minimum flexibility, and when mathematical analysis is applied, when 0, the solution is solved. Must have two positive roots 1. Metallurgy 1 = and 0. , then, the minimum bit.

Value, apply the method of mathematical analysis on 1 + 4, expand the formula 7 and start with the classification = function 1.

Soil 1 into 1 plant has 3 from the previous analysis, 1 variable is coupled with each other, so to determine its value must be 8 and simultaneous solution.

3. The book parameter is biased to solve the formula (3). This square is the real root. Among them, +jf+jF will be 3 into the 2 formula to determine and then find the value in the 3 formula.

If there are parameters in 1 and the structure is determined by the structure, the other parameters are required to be simple. The final example of this paper will explain the transmission force of this method, the axial stiffness and the optimal parameters of the outer support. 1. Simplified model of the main shaft components When the transmission force is outside the rear support, the mechanical model 5 2. Using the superposition method to find the displacement and compliance, under the force, the displacement of the cargo bow is 6 small.

吟才0, the displacement caused by the deformation of the elastic main shaft 6 displacement caused by the elastic support deformation 64 The total displacement caused by the force is the same as the displacement caused by the addition of 虬 and 12, and finally the total displacement of the shaft end is the special W in determining the sum, There is also a simultaneous solution, the method is similar to the above, and will not be repeated here.

In summary, whether the transmission force is in the middle of the rear support or in the middle of the two supports, the flexibility can be minimized as long as the size of 1 and is appropriately selected. The shaft stiffness is maximized during actual design. The deformation caused by the force at the end of the grinding wheel should be offset as much as possible in order to receive the best results.

Axial stiffness calculation example vertical end grinding machine spindle simple! =0.35, try to determine 1 to calculate the axial stiffness of the spindle of this system, and analyze the proportion of deformation of each part in the total deformation.

Solution 1 is taken as =70, and each known parameter is substituted into Equation 7. C = 0.82406X105Hmi is calculated in the flexibility calculation formula 7, and the 13th two is the seventh degree caused by the deformation of the shaft caused by the deformation of the shaft itself. Shandai =. That is, the degree of compliance is proportional to the change, so the proportion of the softness of each part in the total compliance is the same as the proportion of the deformation of each part in the total deformation, so the proportion of the deformation of the shaft itself is the proportion of the total deformation. The deformation of the bearing in the total deformation ratio 圮 thrust bearing deformation in the total deformation of the proportion of 圮 240 conditions, according to the discussion of the former blood design 1. The proportion of each part in the total deformation is the shaft itself deformation of 30.6, The radial bearing deformation accounts for 3.05, and the thrust bearing deformation accounts for 66.3. It can be seen from the above two cases that the stiffness obtained by the equation 8 is higher than the first case, and it can be seen that the proportion of the thrust bearing deformation is too large. The design should be focused on.

Conclusion The influence of the transmission force gives the calculation formula of the axial stiffness.

The deformation of the end to increase the system shaft to the stiffness wheel position. And give the corresponding formula, this article is discussed in the face grinding machine but the conclusions are equally applicable to other similar machine tools.

Grinder and grinding. 81 Yu Chengzhou. The main reference selection and design of the rigid boring spindle of the combined machine tool. The combined machine hemp, 983 is connected to the 44th medium grinding speed of 3.5, 186, and 0.0, 2 working pressure for the 091 grinding wheel with mineral oil, resulting in a material removal rate of 2 and 4; Surface roughness.

If higher grinding speeds are used, higher material removal rates and better surface quality will result. Under greater working pressure, the material removal rate will increase, but due to the increased grinding depth, the surface quality will be damaged. Higher grinding speeds and working pressures also reduce shape accuracy such as flatness.

The combination of 20130 and 091 grinding wheels with ceramics can also produce high quality for 4 parts. The material removal rate is similar to that of the processing, 3. But the quality of the parts is much better, this is 01, or smaller. This is done by a different material removal mechanism. Grinding speed is the main factor affecting the fine grinding of parts.

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