A three-direction variable heavy machine tool foundation model box with controllable boundary conditions

Abstract

A three-direction variable type heavy machine tool foundation model box controllable in boundary condition comprises a bottom plate, leakage-proof strips, a lower baffle A, a lower baffle B, a lower baffle C, a lower baffle D, an upper baffle E, an upper baffle F, an upper baffle G, an upper baffle H, bearing bases, bearings, ball screw lifters, bolt grooves, bolts, calibrated scales, displacement sensors, horizontal rotary knobs and pressure sensors. The lower baffle A is clamped on the bottom plate. Three ball screws adjust the lengths in the x, y and z directions correspondingly according to data of the pressure sensors, and the pressure between different soil layers in an experiment is adjusted. The bearing bases and the ball screw lifters are fixed to the baffles through screws. The friction force between the ball screws and the bearing bases is reduced through the bearings. The displacement sensors are used for detecting whether the model box is horizontal or not and are adjusted through the horizontal rotary knobs. The pressure sensors facilitate detecting of the pressure between all the soil layers, are used for controlling the artificial boundary conditions and adjusting the artificial boundary conditions according to an experimental scheme, and improve the experimental precision.

Description

technical field [0001] The invention relates to the field of machine tool foundation research, in particular to the design of a model box in the machine tool foundation model test. Background technique [0002] Heavy-duty CNC machine tools are mainly used for processing large and extra-large precision parts. Industrial pillar industries and national key engineering project services. However, in order to meet the precision requirements of heavy CNC machine tools, the load-bearing capacity of the foundation is crucial. Studying the load bearing of machine tools requires building models of machine tools and foundations, followed by extensive testing using soil box tests. [0003] The soil box in the soil box test is under the pressure of the soil, and the soil pressure affects the artificial boundary conditions of the foundation of the heavy-duty CNC machine tool. The artificial boundary conditions have a great influence on the accuracy of the soil box experiment. The soil bo...

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Problems solved by technology

The size of the soil box is generally a fixed shape, and its size cannot be changed after processing. It is difficult to adjust the pressure between the soil layers in the model box in the test; at the same time, the size of the model box in the test is based on the actual situation of the test bench and the structure size of the upper machine tool, The shape and other factors determine the size and shape of the model box. The current test plan is designed for the size and shape of a machine tool. For different machine tools, multiple model boxes need to be designed repeatedly, and the utilization rate is relatively low.

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