CN102248407A - Inclined beam structure for high-precision aspheric surface machining machine tool - Google Patents

Abstract

The described inclined beam structure for high-precision aspheric surface processing machine tools belongs to the field of advanced manufacturing. The present invention mainly relates to a 45° inclined beam structure, an adjustable closed hydrostatic guide rail and a double-plate linear motor opposed installation structure. The oblique beam structure 1 improves the stress of the beam and reduces the two-dimensional deflection deformation of the beam. Adjusting the right adjusting static pressure block 19 can flexibly realize the adjustment of the oil film thickness of the closed hydrostatic guide rail, and the assembly efficiency is high. The flat linear motor primary 9 and 12 are installed vertically on the T-shaped linear motor mounting base 11 and the primary installation transition plate 10, respectively, which effectively reduces the deformation caused by the suction force of the motor, and realizes high precision and high dynamic characteristics of the beam component. The invention can be used as a beam part of a high-precision aspheric optical part processing machine tool, has high precision, high rigidity, high dynamic characteristics, reduces the depth of subsurface damage layer caused by cutting optical parts, and improves part processing efficiency.

Description

An inclined beam structure for high-precision aspheric surface processing machine tools

technical field

The invention belongs to the field of advanced manufacturing. The traditional large and medium-sized bed beam structure is improved, and the beam structure can be used to flexibly realize the adjustment of the oil film thickness of the closed hydrostatic guide rail, and realize the direct drive technology of low-cost double-plate linear motors. The beam structure The structure is characterized by high precision, high rigidity and high dynamic characteristics.

Background technique

With the development of manufacturing technology and the start of major projects, the requirements for processing precision of high-precision aspheric optical parts are getting higher and higher, and the processing machine tools are required to have high precision, high rigidity and high dynamic characteristics. The key technologies of high-precision machining machine tools, such as guide rail form and driving mode, largely determine the performance of the machine tool. The application of hydrostatic guideway technology and linear motor direct drive technology can meet the requirements for high precision, high rigidity and high dynamic characteristics of machine tools.

Contents of the invention

The purpose of the present invention is to minimize the quality of machine tool parts for processing large-caliber high-precision aspheric optical parts, improve the precision and rigidity of hydrostatic guide rails, and finally realize high precision, high rigidity and high dynamic characteristics.

Technical scheme of the present invention is:

The use of 45° inclined beams improves the stress on the beams, effectively decomposes the weight of beam components and Z-axis components, reduces the load requirements on hydrostatic guide rails, reduces the requirements on hydraulic systems, effectively improves the accuracy of guide rails, and reduces costs. ;

Adjustable closed hydrostatic guide rail structure, the hydrostatic block is fixed by a 1:100 wedge-shaped mounting surface, which can easily realize the adjustment of the thickness of the hydraulic oil film, and is flexibly applicable to different load situations;

The double-plate linear motors are installed vertically opposite each other, and the suction of the motors is offset by the mounting plates to reduce the influence of the suction on the mechanical structure, ensuring the accuracy and performance of the components.

Based on the requirements of high precision, high rigidity and high dynamic characteristics of the aspheric surface processing machine tool, the present invention adopts a 45° inclined beam structure, double-plate linear motors installed oppositely, and an adjustable closed hydrostatic guide rail structure.

Description of drawings

Figure 1 is a structural diagram of the inclined beam of the high-precision aspheric surface processing machine tool.

Fig. 2 is a schematic diagram of the force of the opposite installation structure of the double-plate linear motors.

Detailed ways

The embodiments are further described below in conjunction with the accompanying drawings.

The described inclined beam structure for high-precision aspheric surface processing machine tools is shown in Figure 1, including a 45° inclined beam 1, a bead on the slide plate 2, a lower left static pressure block 3, an upper left static pressure block 4, and an upper bead on the guide rail 5 , sliding plate 6, left motor installation side plate 7, linear motor secondary 8, linear motor primary 9, primary installation transition plate 10, T-shaped linear motor mounting seat 11, linear motor primary 12, linear motor secondary 13, right motor Install side plate 14, linear motor installation base plate 15, right static pressure block 16, upper right static pressure block 17, guide rail bottom pressure bar 18, right adjustment static pressure block 19, right bottom static pressure block 20, slide plate bottom pressure bar 21.

The inclined beam structure of the high-precision aspheric surface processing machine tool adopts a 45° inclined beam 1, which improves the stress on the beam, decomposes the weight of the slide plate 6 and the Z-axis components of the machine tool, and makes the upper bezel 5 of the guide rail and the lower bead 18 of the guide rail The load on the guide surface and the load-bearing surface is reduced, which reduces the force deformation of the guide rail bead, and also reduces the requirements for the hydrostatic system, which is conducive to improving the bearing capacity and guiding accuracy of the guide rail.

The inclined beam structure of the high-precision aspheric surface processing machine tool adopts an adjustable closed hydrostatic guide rail structure, as shown in Figure 1, including a right static pressure block 16, a right upper static pressure block 17, a guide rail lower bar 18, and a right adjustment static pressure Block 19, lower right static pressure block 20, bead 21 under the sliding plate. Right adjustment static pressure block 19 bottom surface installation surfaces are wedge-shaped surfaces of 1: 100, are installed by cooperating with slide plate 6 wedge-shaped installation surfaces. By adjusting the right static pressure block 19, the thickness of the liquid oil film under different loads is ensured, thereby ensuring the rigidity of the closed hydrostatic guide rail. Through this adjustable closed hydrostatic guide rail structure, the installation and debugging of the hydrostatic guide rail can be easily realized, flexibly applicable to different load conditions, improving assembly efficiency, reducing guide rail processing accuracy, and effectively reducing costs.

The inclined beam structure of the high-precision aspheric surface processing machine tool is driven by a double-plate linear motor, as shown in FIG. 1 . A large suction force will be generated between the primary and secondary of a single flat linear motor, which will directly cause deformation of the mechanical structure and affect the accuracy of the machine tool. In order to reduce the impact of the flat linear motor suction on the mechanical structure, two flat linear motors are installed vertically. Double linear motor secondary 8 and 13 are respectively installed on left motor installation side plate 7 and right motor installation side plate 14, and linear motor primary 9 and 12 are installed on T-shaped linear motor mounting base 11 and primary installation transition plate 10 respectively. For the T-shaped linear motor mounting base 11, the force schematic diagram is shown in Figure 2. The motor suction forces F1 and F2 can cancel each other out for the T-shaped linear motor mounting base 11, and the slide plate 6 is basically not deformed by the suction force of the flat linear motor. The effect is to improve the rigidity of the slide plate 6 and the precision of the crossbeam parts, while ensuring sufficient rigidity of the crossbeam parts, effectively reducing the mass of the machine tool parts and improving the dynamic characteristics of the crossbeam parts.

Claims (4)

1. An inclined beam structure for a high-precision aspheric surface processing machine tool, the inclined beam structure includes a 45° inclined beam, a sliding plate, an adjustable closed hydrostatic guide rail structure, and a double-plate linear motor opposing installation structure. It is characterized by: 1) The oblique installation structure of the 45° inclined beam effectively improves the stress condition of the beam and reduces the two-dimensional deformation; 2) Adjustable closed hydrostatic guideway structure, the hydrostatic block is fixed by a 1:100 wedge-shaped mounting surface, which can facilitate the adjustment of the oil film thickness; 3) The double-plate linear motors are installed opposite to each other to offset the suction of the motors, reduce the influence of suction on the mechanical structure, and greatly improve the accuracy of parts; The beam structure has the characteristics of small mass, good stress condition, high rigidity, and minimizes the influence of linear motor suction, which ensures high rigidity, high precision and high dynamic performance of machine tool beam components. 2. A kind of inclined beam structure for high-precision aspheric surface processing machine tool according to claim 1, characterized in that: 45° inclined mounting surface improves the stress on the beam and effectively decomposes the beam parts and Z-axis parts The weight reduces the load requirements on the hydrostatic guide rail, reduces the requirements on the hydraulic system, effectively reduces the two-dimensional deflection deformation of the beam, and reduces the processing cost. 3. According to claim 1, a kind of inclined beam structure for high-precision aspheric surface processing machine tools is characterized in that: the structure of the closed hydrostatic guide rail can be adjusted, and the hydrostatic block passes through the wedge-shaped mounting surface of 1:100 Fixed, it is convenient to realize the adjustment of the thickness of the hydraulic oil film, and it is flexibly applicable to different load situations. 4. A kind of inclined beam structure for high-precision aspheric surface processing machine tools according to claim 1, characterized in that: the suction force of the flat linear motor seriously affects the accuracy of the mechanical structure, and the two flat linear motors are vertically opposed to each other. , for the mounting plate to offset the suction of the motor, reduce the influence of the suction on the mechanical structure, and ensure the accuracy and performance of the components. the

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