Large-span beam guide rail micro-deformation adjusting structure and adjusting system

Abstract

The utility model discloses a kind of big span crossbeam guide rail micro-deformation adjustment structure and adjustment system, above-mentioned adjustment structure includes unloading plate, draw plate, screw rod and nut, draw plate is installed in the middle region of crossbeam side, unloading plate is located in the side of draw plate, unloading plate is installed on crossbeam side, one end of screw rod is installed on unloading plate, the other end of screw rod extends through draw plate and is spirally connected on nut after.The adjustment system provided by the utility model can realize the fine adjustment of the bending degree and the torsion overturning deformation of the crossbeam guide rail, to improve the linearity of the crossbeam guide rail. Compared with the prior art, the adjustment system realizes the precision adjustment of the guide rail under the assembly state of the crossbeam, avoids the reprocessing of the crossbeam guide rail, improves the efficiency while reducing the cost. In addition, the adjustment system also solves the problem of the existing technology difficult to improve the forward deformation of the crossbeam guide rail, can obviously improve the linearity of the crossbeam guide rail in two directions.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty gantry CNC machine tools, and in particular to a micro-deformation adjustment structure and system for a large-span crossbeam guide rail. Background Technology

[0002] The crossbeam is mounted on the column guide rails of the gantry frame. As a major supporting component of the gantry heavy-duty machine tool, the crossbeam guide rails play a crucial role in the dynamic and static characteristics of the machine tool, and their deformation directly affects the overall accuracy of the machine tool. Fine-tuning the straightness of the crossbeam guide rails in the assembly state using a preset adjustment device is of great significance for improving the machine tool's accuracy.

[0003] Due to the large span and heavy weight of the crossbeam guide rail, as well as the loads such as the weight of moving parts and cutting forces, the crossbeam guide rail will bend and deform downward in the vertical direction. Furthermore, due to the crossbeam structure and load, the center of gravity is forward, causing the crossbeam guide rail to undergo forward torsional and overturning deformation.

[0004] To reduce the deformation of the crossbeam guide rail, finite element analysis is often used to calculate the deformation data of the crossbeam guide rail under its working posture and fit it into a deformation curve. Through reverse deformation processing, a certain amount of protrusion is reserved on the top surface of the main guide rail to offset the vertical bending deformation of the crossbeam guide rail. However, due to the gap between reality and theory, the reserved reverse deformation amount cannot completely offset the vertical bending deformation of the crossbeam guide rail. This necessitates reprocessing the crossbeam guide rail based on measured inspection data during actual production, and the reverse deformation processing also fails to improve the torsional and overturning deformation of the crossbeam guide rail. Summary of the Invention

[0005] To address the aforementioned issues, a micro-deformation adjustment structure and system for a large-span crossbeam guide rail is provided. This system aims to adjust the bending and torsional deformation of the crossbeam guide rail, thereby improving the straightness of the machine tool crossbeam guide rail.

[0006] The specific technical solution is as follows:

[0007] The first aspect of this utility model is to provide a micro-deformation adjustment structure for a large-span crossbeam guide rail, comprising: an unloading plate, a pull plate, a screw, and a nut. The pull plate is installed in the middle area of ​​the side of the crossbeam, the unloading plate is located on one side of the pull plate, the unloading plate is installed on the side of the crossbeam, one end of the screw is installed on the unloading plate, and the other end of the screw extends through the pull plate and is installed on the nut.

[0008] Furthermore, positioning holes are provided at both ends of the unloading plate, and positioning pins are inserted through the corresponding positioning holes. A pressure plate for restricting the movement of the unloading plate is installed at the end of the positioning pin.

[0009] Furthermore, the two ends of the unloading plate extend to the two ends of the side of the crossbeam, and the positioning hole is located at one end of the side of the crossbeam.

[0010] Furthermore, the middle part of the unloading plate is installed on the crossbeam via a pad and limit screws that pass through the pad and the unloading plate in sequence.

[0011] Furthermore, the pull plate is fixed to the crossbeam with screws.

[0012] Furthermore, one end of the screw is screwed onto the unloading plate, and the other end of the screw extends through the pull plate and is screwed onto the nut.

[0013] The second aspect of this utility model is to provide a micro-deformation adjustment system for a large-span crossbeam guide rail, which includes multiple of the above-mentioned micro-deformation adjustment structures for the large-span crossbeam guide rail.

[0014] Furthermore, the large-span crossbeam guide rail micro-deformation adjustment structure is installed in pairs on the upper and lower sides of the crossbeam.

[0015] Furthermore, the micro-deformation adjustment structure of the large-span crossbeam guide rail is installed in pairs on the front and rear sides of the crossbeam.

[0016] Furthermore, there are four micro-deformation adjustment structures for the large-span crossbeam guide rail, which are installed on the upper, lower, front, and rear sides of the crossbeam.

[0017] The beneficial effects of the above scheme are:

[0018] The adjustment system provided by this invention can fine-tune the bending deflection and torsional overturning deformation of the crossbeam guide rail, thereby improving the straightness of the crossbeam guide rail. Compared with the prior art, this adjustment system enables precise adjustment of the crossbeam guide rail in the assembled state, avoiding reprocessing of the crossbeam guide rail, improving efficiency and reducing costs. In addition, this adjustment system also solves the problem of the difficulty in improving the forward tilting deformation of the crossbeam guide rail in the prior art, and can significantly improve the straightness of the crossbeam guide rail in both directions. Attached Figure Description

[0019] Figure 1 A schematic diagram of the pre-installed adjustment structure on the upper and rear sides of the crossbeam guide rail;

[0020] Figure 2 This is a schematic diagram of the pre-installed adjustment structure on the front and lower sides of the crossbeam guide rail.

[0021] In the attached diagram: 1. Unloading plate; 2. Positioning pin; 3. Pressure plate; 4. Screw; 5. Nut; 6. Pull plate; 7. Washer plate; 8. Limit screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] The present invention will be further described below with reference to specific embodiments, but this is not intended to limit the present invention.

[0025] like Figure 1 , Figure 2 As shown, the micro-deformation adjustment structure for the large span crossbeam guide rail provided in this utility model includes: an unloading plate 1, a pull plate 6, a screw 4, and a nut 5. The pull plate 6 is installed in the middle area of ​​the side of the crossbeam, the unloading plate 1 is located on one side of the pull plate 6 and installed on the side of the crossbeam, one end of the screw 4 is installed on the unloading plate 1, and the other end of the screw 4 extends through the pull plate 6 and is spirally connected to the nut 5.

[0026] In this utility model, the pull plate 6 is installed in the middle area of ​​the crossbeam where deformation is likely to occur, and the unloading plate 1 is fixedly connected to the two ends of the crossbeam where it is sturdy and relatively less prone to deformation. That is, the areas on the four sides of the crossbeam, near the connection between the crossbeam and the column, are connected by rotating the nut 5 to tighten the screw 4. This allows the crossbeam guide rail to undergo controllable deformation under the tension of the screw 4, improving the straightness of the crossbeam guide rail.

[0027] In this utility model, the unloading plate 1 has positioning holes at both ends. The unloading plate 1 is installed on the crossbeam by positioning pins 2 and pressure plates 3 installed in the positioning holes. The position of the unloading plate 1 is restricted by positioning pins 2 and pressure plates 3. The middle part of the unloading plate 1 is installed on the crossbeam by pads 7 and limiting screws 8 that pass through pads 7 and unloading plate 1 in sequence. The position of the unloading plate 1 on the crossbeam is further restricted by pads 7 and limiting screws 8.

[0028] Furthermore, in this utility model, the aforementioned large-span crossbeam guide rail micro-deformation adjustment structures can be installed in pairs on two opposite sides of the crossbeam, such as by installing the two sets of large-span crossbeam guide rail micro-deformation adjustment structures in a centrally symmetrical manner on the upper and lower sides of the crossbeam (e.g.) Figure 1 , Figure 2As shown), the upper and lower sides of the crossbeam under the above structure can reduce the forward tilting deformation of the crossbeam guide rail under the tension of the screw 4; at the same time, the bending deformation of the crossbeam guide rail can be reduced under the tension of the screw 4 at the left and right ends of the lower side of the crossbeam. Alternatively, the above two sets of large-span crossbeam guide rail micro-deformation adjustment structures can be installed symmetrically at front and rear intervals on the front and rear sides of the crossbeam (e.g. Figure 1 , Figure 2 As shown in the figure, under the above structure, the front and rear sides of the crossbeam can be forced to deform upward under the tension of the screw 4, thereby reducing the downward deflection of the crossbeam guide rail.

[0029] It is not difficult to understand that in this utility model, the above-mentioned two or four large-span crossbeam guide rail micro-deformation adjustment structures can also be directly assembled onto the crossbeam to solve the problem of adjusting the straightness of the guide rails when the crossbeam is assembled.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the content of the present utility model specification should be included within the protection scope of the present utility model.

Claims

1. A micro-deformation adjustment structure for a large-span crossbeam guide rail, characterized in that, include: The unloading plate, pull plate, screw, and nut are provided. The pull plate is installed in the middle area of ​​the side of the crossbeam. The unloading plate is located on one side of the pull plate and is installed on the side of the crossbeam. One end of the screw is installed on the unloading plate, and the other end of the screw extends through the pull plate and is installed on the nut.

2. The micro-deformation adjustment structure for the large-span crossbeam guide rail according to claim 1, characterized in that, The unloading plate has positioning holes at both ends, and positioning pins are inserted through the positioning holes. A pressure plate for restricting the movement of the unloading plate is installed at the end of the positioning pin.

3. The micro-deformation adjustment structure for the large-span crossbeam guide rail according to claim 1 or 2, characterized in that, The unloading plate extends to both ends of the side of the crossbeam, and the positioning hole is located at one end of the side of the crossbeam.

4. The micro-deformation adjustment structure for the large-span crossbeam guide rail according to claim 1, characterized in that, The unloading plate is mounted on the crossbeam via a pad and a limiting screw that passes through the pad and the unloading plate in sequence.

5. The micro-deformation adjustment structure for the large-span crossbeam guide rail according to claim 1, characterized in that, The pull plate is fixed to the crossbeam by screws.

6. The micro-deformation adjustment structure for the large-span crossbeam guide rail according to claim 1, characterized in that, One end of the screw is helically mounted on the unloading plate, and the other end of the screw extends through the pull plate and is helically connected to the nut.

7. A micro-deformation adjustment system for a large-span crossbeam guide rail, characterized in that, It includes the micro-deformation adjustment structure for the large-span crossbeam guide rail as described in any one of claims 1-6.

8. The micro-deformation adjustment system for the large-span crossbeam guide rail according to claim 7, characterized in that, The large-span crossbeam guide rail micro-deformation adjustment structure is installed in pairs on the upper and lower sides of the crossbeam.

9. The micro-deformation adjustment system for the large-span crossbeam guide rail according to claim 7, characterized in that, The large-span crossbeam guide rail micro-deformation adjustment structure is installed in pairs on the front and rear sides of the crossbeam.

10. The micro-deformation adjustment system for the large-span crossbeam guide rail according to claim 7, characterized in that, The number of the large-span crossbeam guide rail micro-deformation adjustment structures is four, and the large-span crossbeam guide rail micro-deformation adjustment structures are installed on the upper, lower, front and rear sides of the crossbeam respectively.

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