Precision retentivity test bench for concave non-coplanar multi-guide-rail feeding system

Abstract

The utility model discloses an indent non-coplanar multi-guide-rail feeding system precision retentivity test bed. The indent non-coplanar multi-guide-rail feeding system precision retentivity test bed comprises an indent bed body, a T-shaped workbench, a hydraulic device, a servo motor, a hydraulic loading device, a linear guide rail, a ball screw and the like. In the moving process of the workbench, the hydraulic device can apply transverse pressure to the sliding block through the hydraulic rod connected with the sliding block, and the influence mechanism of the external load on the precision retentivity can be conveniently researched. The machine tool body is designed in a concave mode, the concave structure of the machine tool body meets the design requirement of a non-coplanar structure, the system is different from a traditional coplanar double-guide-rail four-sliding-block feeding system, and the working stability of a machine tool is improved. In order to adapt to the concave bed body, the working table adopts a T-shaped design, and meanwhile, the hydraulic loading device is arranged at the lower half part of the T-shaped working table. According to the design, the influence mechanism of the external load on the precision retentivity can be researched, the machining precision requirement is met, the machining precision is effectively improved, and the method is worthy of application and popularization.

Description

Technical Field

[0001] The present invention relates to the field of CNC machine tools, specifically feed systems within CNC machining equipment. More specifically, the present invention relates to a precision retention test bench for concave, non-coplanar, multi-guide feed systems. This test bench is designed to experimentally investigate the precision retention of feed systems with non-coplanar structures, particularly in applications requiring high-precision machining, such as CNC machine tools. Background Art

[0002] Manufacturing is a top priority in my country's industrial sector. High-end CNC equipment has been designated a key national development industry, placing even higher demands on machining accuracy. High-precision, high-speed, and high-acceleration machining has become a trend. However, under these conditions, the machine tool's feed direction is susceptible to vibration, which may indirectly affect the machine tool's experimental accuracy. The precision retention test bench for a recessed, non-coplanar, multi-guideway feed system was designed to investigate the mechanism by which applied loads affect precision retention. This provided a solid theoretical foundation for future research on improving guideway motion accuracy, and thus machine tool experimental accuracy. Summary of the Invention

[0003] The purpose of this patent is to provide a concave non-coplanar multi-guide feed system precision retention test bench, which is applied to CNC machine tools to study the influence mechanism of external load on precision retention.

[0004] The purpose of this invention is achieved through the following technical solutions:

[0005] The invention discloses an accuracy retention test bench for an inward-concave non-coplanar multi-guideway feeding system, comprising a bed component, a slide rail component, a driving component and a hydraulic system.

[0006] The bed components include an inwardly recessed bed and anchor screws;

[0007] The slide rail component includes a rolling linear guide pair and a slide plate;

[0008] The driving component includes a ball screw mechanism and a servo motor;

[0009] The hydraulic system includes a hydraulic loading device and a hydraulic rod;

[0010] Preferably, the slide rail assembly includes a rolling linear guide pair and a slide plate. There are a total of 6 linear guide rails, 4 of which are located on the horizontal plane, 2 of which are installed on the horizontal plane of the concave part of the bed, and the remaining 2 are installed on the horizontal planes on both sides of the bed. Each sliding guide rail is equipped with 2 sliders and 2 sets of gaskets, and above the gaskets is a slide plate. The 2 sliding guide rails located on the vertical plane are respectively installed on the vertical planes on both sides of the concave part of the bed, and each sliding guide rail is equipped with 1 slider and 1 set of gaskets; the use of non-coplanar installation of the guide rails can more effectively utilize space and have flexibility. The slide plate is placed above the gasket, and when the slider moves along the guide rail, it can realize the process of driving the slide plate to move.

[0011] Preferably, the drive assembly includes a servo motor and a ball screw mechanism. The key components in the machine tool feed direction are composed of a screw, bearings, and nuts. In this mechanism, the workbench drives the ball screw to rotate under the action of the servo motor, and the ball screw pushes the slide along the guide rail. In the design, the motor device is installed on the concave part of the bed, and the motor pushes the slide through the ball screw mechanism to achieve more accurate measurement. This arrangement improves the measurement efficiency of the test bench and the efficiency of subsequent error analysis.

[0012] Compared with the existing technology, the technical solution of the present invention has the following beneficial effects:

[0013] The machine bed of this patented invention is a key component. Its concave design meets the requirements of non-coplanar structural design. As the primary load-bearing component, the concave bed features numerous internal square ribs with perforations and external pressure relief holes. This increases the machine's load-bearing capacity and enhances operational stability during high-speed and high-precision machining. Rolling linear guides with sliders are installed parallel to each side of the bed, connecting the sliders to the worktable. A ball screw nut pair consisting of a fixed end and a bearing end is installed in the center of the concave portion of the upper surface of the bed. The ball screw is connected to the fixed end and the bearing end. The hydraulic system is installed in the concave portion of the bed. The bed utilizes a ribbed design, rather than a solid casting. This design improves workpiece rigidity while meeting strength requirements. Furthermore, this design optimizes air flow, allowing for more efficient heat dissipation compared to a solid-cast bed.

[0014] 2. The hydraulic system of the patented invention is an important component. Pressure is generated by a hydraulic loading device installed inside the workbench, and lateral pressure is applied to the slider located on the vertical plane through the hydraulic rod to study the mechanism of the influence of external load on precision retention.

[0015] 3. The patented shape of the present invention adopts a rectangular parallelepiped structure, which has the following advantages compared with other traditional lathes: strong stability; strong machine rigidity; wider processing range and easier automation.

[0016] 4. The guide rails of the patented invention are installed in a non-coplanar manner. There are a total of 6 guide rails, 4 of which are installed on the horizontal plane, 2 of which are installed on the horizontal plane of the concave part of the bed, and the remaining 2 are located on the horizontal planes on both sides of the bed; 2 guide rails are installed on the vertical plane, respectively installed on the vertical planes on both sides of the concave part of the bed, forming a non-coplanar installation of the guide rails.

[0017] 5. In order to adapt to the concave bed structure, the workbench of the patent of the present invention is designed to be T-shaped. A hydraulic loading device is installed inside the lower part of the T-shaped workbench, and a T-slot for fixing the workpiece is also provided on the upper surface of the workbench. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the bed of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the slide rail component of the present invention.

[0021] Figure 4 It is a three-dimensional structural diagram of the hydraulic system of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the driving device of the present invention.

[0023] In the figure: 1 is the concave bed; 2 is the driving device; 3 is the guide rail; 4 is the slider; 5 is the T-shaped workbench; 6 is the hydraulic system; 11 is the basic bed; 12 is the anchor screw; 21 is the servo motor; 22 is the base of the screw; 23 is the motor base; 24 is the ball screw structure; 61 is the hydraulic loading device; 62 is the hydraulic rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] like Figure 1 As shown, a concave non-coplanar multi-guide feed system precision retention test bench includes 1-concave bed; 2-drive device; 3-guide rail; 4-slider; 5-T-type workbench; 6-hydraulic system.

[0026] like Figure 2 As shown, the bed 1 includes 11-concave bed and 12-anchor screws. The basic bed adopts a concave type, and the concave structure of the concave bed meets the non-coplanar structural design requirements, thereby improving the working stability of the machine tool, especially in high-speed processing and high-precision processing scenarios. The hydraulic system is installed in the concave part of the bed and forms a non-coplanar guide rail installation layout. The rib plate process is adopted to improve the heat dissipation performance of the machine tool during processing while meeting the rigidity requirements. The outer shape adopts a rectangular structure, which has the following advantages compared to other traditional shapes of lathes: strong stability; strong machine tool rigidity. The length of the bed is 1300mm and the width is 800mm.

[0027] like Figure 3 As shown, the slide assembly includes guide rails 3 and sliders 4, totaling six guide rails and ten sliders. Four guide rails are installed on the horizontal surface, two of which are installed on the horizontal surface of the bed's recess, and the remaining two are located on the horizontal surfaces on both sides of the bed. Two guide rails are installed on the vertical surfaces, one on each side of the bed's recess, forming a non-coplanar installation of the guide rails. The guide rails and sliders ensure the normal operation of the machine tool during processing.

[0028] like Figure 4 As shown, the hydraulic system 6 includes a hydraulic loading device 61 and a hydraulic rod 62. The hydraulic loading device generates a force which is transmitted to the slider via the hydraulic rod.

[0029] like Figure 5 As shown, the driving device 2 includes a motor 21, a screw base 22, a motor base 23 and a ball screw structure 24, which provides a power source for the test bench.

[0030] In summary, this test platform, a precision retention test bench for recessed, non-coplanar, multi-guideway feed systems, features a slide that reciprocates back and forth on linear guideways, driven by a ball screw. The operating principle is that a motor drives the ball screw through a coupling, which in turn drives the left and right slides to reciprocate along the guideways, thus achieving the desired effect.

[0031] The present invention is not limited to the embodiments described above. The above description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention. The above specific embodiments are merely illustrative and not restrictive. Without departing from the scope of the present invention and the scope of protection of the claims, those skilled in the art may make various specific modifications based on the teachings of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A concave non-coplanar multi-guide feed system precision retention test bench, used for CNC machine tools, characterized by: It includes a concave bed, a T-shaped workbench, a hydraulic system, a slide rail component, and a driving component; the concave bed is the main load-bearing component, so a square rib is set up inside and a pressure relief hole is provided on the outside to improve the load-bearing capacity; rolling linear guide pairs with sliders are installed in parallel on both sides of the bed, and the sliders are connected to the workbench. The bed is designed with a concave design, and a ball screw nut pair consisting of a fixed end and a bearing end is installed in the middle of the concave part of the upper surface of the bed, and a ball screw is connected through the fixed end and the bearing end. The driving component is installed on the fixed end of the ball screw nut pair to drive the ball screw to rotate; the hydraulic system includes a hydraulic rod and a hydraulic loading device; the driving component includes a servo motor and a ball screw mechanism; the key components in the feed direction of the machine tool are composed of a screw, a bearing, and a nut; in order to adapt to the concave bed, the workbench is designed to be T-shaped.

2. The precision retention test bench for an inward-recessed non-coplanar multi-guide feed system according to claim 1, characterized in that: The bed adopts a concave design. The concave structure of the bed meets the non-coplanar structural design requirements, which improves the working stability of the machine tool in high-speed processing and high-precision processing scenarios; the hydraulic system is installed in the concave part of the bed and forms a non-coplanar guide rail installation layout. At the same time, a large number of stiffeners are used inside to reduce the weight of the bed and increase the rigidity of the bed, and holes are opened on the stiffeners; the length of the bed is 1300mm and the width is 800mm.

3. The precision retention test bench for an inward-recessed non-coplanar multi-guide feed system according to claim 1 is characterized by: The slide rail components include rolling linear guide pairs and slide plates; the guide rails are installed non-coplanarly, with a total of 6 linear guide rails, 4 sliding guide rails located on the horizontal plane, 2 of which are installed on the horizontal plane of the recessed part of the bed, and the remaining 2 are installed on the horizontal planes on both sides of the bed; each sliding guide rail is equipped with 2 sliders and 2 sets of gaskets, and above the gaskets is a slide plate, and the 2 sliding guide rails of the sliding guide rails located on the vertical plane are respectively installed on the vertical planes on both sides of the recessed part of the bed, and each sliding guide rail is equipped with 1 slider and 1 set of gaskets; the linear guide rails are fixed on the bed, the sliders and guide rails cooperate, and the adjustment pads are placed above the sliders; the guide rails are installed non-coplanarly to meet the experimental research on the accuracy retention of the feed system of the non-coplanar structure in precision machine tools; the slide plate is placed above the gasket, and when the slider moves along the guide rail, it can drive the slide plate to realize the movement process.

4. The precision retention test bench for an inward-recessed non-coplanar multi-guide feed system according to claim 1 is characterized by: The driving components include a servo motor and a ball screw mechanism; in this part of the mechanism, the workbench drives the ball screw to rotate under the drive of the servo motor, and the ball screw drives the slide to move along the guide rail.

5. The precision retention test bench for an inward-recessed non-coplanar multi-guide feed system according to claim 1 is characterized by: The hydraulic system is located in the concave part of the bed and is installed on the lower half of the T-shaped workbench. It moves with the workbench. The hydraulic loading device generates pressure and acts on the hydraulic rod. The hydraulic rod is connected to the slider and can apply lateral pressure to the slider.

6. The precision retention test bench for an inward-recessed non-coplanar multi-guide feed system according to claim 1, characterized in that: In order to adapt to the concave bed, the workbench is designed to be T-shaped, with ribs inside to increase the height; a hydraulic loading device is installed inside the lower part of the T-shaped workbench, and a T-slot is also provided on the upper surface of the workbench for fixing the workpiece.

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