A non-contact air film loading device suitable for high-speed spindle stiffness testing
A high-speed spindle and loading device technology, applied in the direction of measuring devices, elastic testing, machine/structural component testing, etc., can solve the problems of spindle temperature rise, difficulty in realization, and the influence of electromagnetic fields on displacement sensors, etc., to achieve compact structure and easy operation Simple, low-impact effects
Active Publication Date: 2019-05-07
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
Traditional contact loading is difficult to achieve at high speeds
The existing methods mostly use non-contact electromagnetic loading, which has two disadvantages. One is that the electromagnetic field induces eddy current loss on the surface of the measured spindle to generate a large amount of heat, which causes the temperature rise of the spindle. The other is that the electromagnetic field has a certain influence on the displacement sensor.
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[0021] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0022] The invention provides a non-contact air film loading device suitable for testing the stiffness of a high-speed spindle.
[0023] The device includes a base 1, a five-degree-of-freedom adjustment mechanism, an inner loading block assembly, a radial loading assembly, and an axial loading assembly. The five-degree-of-freedom adjustment mechanism is installed on the base 1, and the inner loading block assembly is arranged in the five-degree-of-freedom adjustment mechanism. In the hole, the radial loading assembly and the axial loading assembly are arranged on a five-degree-of-freedom adjustment mechanism;
[0024] Among them: the five-degree-of-freedom adjustment mechanism includes bottom frame 4, pull-down spring 5, linear slide rail 7, linear slide...
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The invention, which belongs to the technical field of technical field of dynamic performance detection of the machine tool, provides a non-contact gas film loading device for high-speed spindle stiffness testing. The device is composed of a base, a five-degree-of-freedom adjusting mechanism, an inner loading block assembly, a radial loading assembly and an axial loading assembly. The five-degree-of-freedom adjusting mechanism is installed on the base; the inner loading block assembly is arranged in an inner hole of the five-degree-of-freedom adjusting mechanism; and the radial loading assembly and the axial loading assembly are arranged at the five-degree-of-freedom adjusting mechanism. Compared with the existing equipment, the non-contact gas film loading device has the following advantages: loading under the high-rotating-speed working condition is realized; the generated heat amount is far less than that by electromagnetic loading; the displacement sensor is little affected; the structure is compact, and the operation is simple.
Description
technical field [0001] The invention relates to the technical field of machine tool dynamic performance detection, in particular to a non-contact air film loading device suitable for high-speed spindle stiffness testing. Background technique [0002] High-speed and high-precision machining are the development direction of the machinery manufacturing industry, and the improvement of workpiece machining accuracy depends on the improvement of the dynamic performance of the electric spindle. Modern advanced manufacturing technology requires the motorized spindle to ensure that the spindle maintains a high rigidity during high-speed cutting, and it is necessary to detect the stiffness of the high-speed motorized spindle. [0003] During the cutting process of the machine tool, the spindle is subjected to cutting forces in three directions: radial, axial and tangential. The rotating spindle needs to be loaded to simulate the actual load situation. Traditional contact loading is ...
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IPC IPC(8): G01M5/00
CPCG01M5/00
Inventor 冯明
Owner UNIV OF SCI & TECH BEIJING