High-precision vertical coordinate boring machine beam assembly adjusting device and method

Abstract

The application discloses a high-precision vertical coordinate boring machine beam assembly adjusting device and method, which comprises a base fixedly connected with a T-shaped slot screw of a vertical coordinate boring machine workbench, a moving seat and an adjusting seat; two horizontal linear guides are arranged on the base, the moving seat is arranged on the base through the linear guides, two vertical linear guides are arranged on the moving seat, and the adjusting seat is arranged on the moving seat through the vertical linear guides; a screw assembly is further arranged between the two horizontal linear guides, and the screw assembly is connected with the moving seat. The device adjusts one set of two devices, finely adjusts the horizontal, vertical and vertical positions of the beam, and ensures the assembly size distance between the roller bearings between the left and right V-shaped guides of the machine tool and the V-shaped guide of the beam. The device is reasonable and simple in structure design, safe and reliable in use, and can effectively ensure the assembly precision requirement of the high-precision vertical coordinate boring machine.

Description

Technical Field

[0001] This invention relates to the field of high-precision coordinate boring machine technology, specifically to a high-precision vertical coordinate boring machine crossbeam assembly and adjustment device and method. Background Technology

[0002] The high-precision vertical coordinate boring machine is a domestically produced double-column high-precision machining tool with extremely high assembly accuracy requirements. The linear axis positioning accuracy is 2.5μm, and the repeatability is 1.2μm. The basic structure consists of left and right columns at both ends of the bed. Both the bed and columns adopt a right-angle V-shaped guide rail structure. The left and right columns each have a right-angle convex V-shaped guide rail, and the crossbeam and column are connected by two right-angle concave V-shaped guide rails. After the right-angle V-shaped guide rails of the column and the crossbeam are fitted with roller linear bearings, there is a roller bearing assembly size gap between the right-angle convex V-shaped guide rail of the column and the right-angle concave V-shaped guide rail of the crossbeam. The dimensional tolerance must be controlled within 0.01mm. The gap between the crossbeam and the left and right column V-shaped guide rails and the assembly accuracy will affect the overall machine accuracy.

[0003] During actual assembly, after the left and right columns are assembled onto the machine tool, there is a dimensional error between the span of the center axis of the convex V-shaped guide rails on the left and right columns and the span of the center axis of the two concave V-shaped guide rails on the crossbeam. This results in a large tolerance in the dimensional spacing of the roller bearings between the V-shaped guide rail surfaces of the left and right columns and the V-shaped guide rail surfaces of the crossbeam, making it impossible to guarantee the assembly accuracy of the roller linear bearings. If the roller bearings are directly assembled, they are prone to damage. Therefore, before assembling the roller linear bearings, a process assembly method is adopted, using an adjustment device to fine-tune the horizontal, vertical, and longitudinal positions of the crossbeam. First, ensure that the dimensional spacing of the roller linear bearings between the V-shaped guide rail at the right end of the crossbeam and the V-shaped guide rail of the right column is within the tolerance. At this time, the dimensional spacing of the roller bearings between the V-shaped guide rail at the left end of the crossbeam and the V-shaped guide rail of the left column is too large. It is necessary to measure this spacing at the left end and adjust the position of the left column to ensure the dimensional spacing of the roller bearings between the V-shaped guide rail at the left end of the crossbeam and the V-shaped guide rail of the left column, and finally ensure the assembly accuracy of the crossbeam and columns. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision vertical coordinate boring machine crossbeam assembly and adjustment device and method to address the above-mentioned problems. By adjusting the horizontal, longitudinal, and vertical positions of the crossbeam, the assembly dimension spacing of the roller bearing between the concave V-guide surface of the crossbeam and the convex V-guide surface of the column is ensured.

[0005] The technical solution of the present invention is as follows:

[0006] This invention discloses a high-precision vertical coordinate boring machine crossbeam assembly and adjustment device, including a base fixedly connected to the T-slot screw of the vertical coordinate boring machine worktable, a movable seat and an adjustment seat; the base is provided with two transverse linear guides, the movable seat is mounted on the base via the linear guides, the movable seat is provided with two longitudinal linear guides, and the adjustment seat is mounted on the movable seat via the longitudinal linear guides; a lead screw assembly is also provided between the two transverse linear guides, and the lead screw assembly is connected to the movable seat.

[0007] In the above structure, the sliding seat is assembled with the slider of the linear guide and fastened with screws; the lead screw nut seat is assembled with the sliding seat and fastened with screws; the lead screw nut on the roller lead screw is assembled with the lead screw nut and fastened with screws; the longitudinal forward and backward movement of the sliding seat can be achieved by rotating the roller lead screw on the adjustment device; the two linear guides are assembled with the sliding seat and fastened with screws; the adjusting seat is assembled with the slider of the linear guide and fastened with screws; the lateral left and right movement of the adjusting seat can be achieved by rotating the adjusting screw in the thrust of the adjusting seat on the sliding seat; the foot seat is mounted on the adjusting seat and fastened with screws and T-blocks through T-slots; the fine-tuning screw is threaded to the foot seat; the vertical up and down movement of the crossbeam can be achieved by adjusting the fine-tuning screw.

[0008] Furthermore, the lead screw assembly includes a bearing support, a roller lead screw, and a lead screw seat. The lead screw seat and the bearing support are respectively disposed at the left and right ends of the base. The bearing support is fixedly connected to the right end of the base by a cylindrical hexagonal head screw. One end of the roller lead screw is installed in the bearing support, and the other end is installed in the lead screw seat.

[0009] Furthermore, a lead screw nut seat is provided below the movable seat, and the lead screw nut seat is connected to the lead screw nut on the roller lead screw.

[0010] Furthermore, sliders are respectively provided on the transverse linear guide and the longitudinal linear guide. The bottom of the movable seat is fixedly connected to the slider of the transverse linear guide with screws, and the adjusting seat is fixedly connected to the slider of the longitudinal linear guide with screws.

[0011] Furthermore, the adjustment seat is provided with two foot seats, and the two ends of the foot seats are fixed to the adjustment seat by screws screwed into the T-shaped blocks on the adjustment seat. A fine-tuning screw is provided on the top of the foot seat, and the fine-tuning screw is connected to the threaded screw hole of the foot seat.

[0012] Furthermore, the base is also provided with movable seat thrust blocks and limiting blocks on both sides. The movable seat thrust blocks are located on both sides of the movable seat, and the limiting blocks are located on the outer sides of the two movable seat thrust blocks. Adjusting seat thrust blocks are provided on both sides of the movable seat. Adjusting seat thrust blocks are located on both sides of the adjusting seat. Both the movable seat thrust blocks and the adjusting seat thrust blocks are provided with adjusting screws and top blocks.

[0013] Furthermore, the adjustment device comprises two sets, which are arranged side by side on the worktable of the vertical coordinate boring machine.

[0014] The above structure, by adjusting two sets of devices, fine-tunes the position of the crossbeam in six directions: horizontal, vertical, and rotation around the horizontal, vertical, and rotation around the vertical directions, ensuring the assembly spacing of the roller bearings between the V-shaped guide rails of the left and right columns of the machine tool and the V-shaped guide rails of the crossbeam.

[0015] Furthermore, one end of the roller screw is connected to the bearing support via a screw support bearing. The outer ring of the bearing support is fixed with a bearing cap by a spacer and a lock nut. The spacer is clearance-fitted with one end of the roller screw and fits against the inner ring plane of the screw support bearing. The lock nut fits against the spacer surface and is used to lock the components. A sleeve, a bushing, and a tapered pin are used to assemble and lock the roller screw together. The sleeve and bushing are clearance-fitted with one end of the roller screw, and the tapered pin fits the bushing hole surface to lock it in place. The other end of the roller screw is connected to the screw seat via a support bearing. The other end of the support bearing and the screw seat are both transition-fitted. A bearing clamp is installed in the screw seat to secure the two ends of the outer circle of the support bearing.

[0016] This invention also discloses a method for assembling and adjusting the crossbeam of a high-precision vertical coordinate boring machine, comprising: when assembling the high-precision vertical coordinate boring crossbeam, two sets are arranged side by side laterally on the vertical coordinate worktable; the left column and the right column are respectively assembled with the machine bed, so that the central axis of the V-shaped guide rail of the left column and the right column are coplanar along the transverse adjustment direction of the crossbeam, and the crossbeam to be assembled is supported on the fine adjustment screws of the two sets of adjustment devices, forming a total of four-point support.

[0017] Furthermore, a level is placed on the crossbeam. By rotating the fine-tuning screws in the two sets of adjustment devices, the crossbeam moves up and down along the vertical adjustment direction of the adjustment devices. By rotating the fine-tuning screws, the crossbeam rotates along the horizontal or vertical rotation direction, making the V-shaped guide rail on the side where the crossbeam is assembled with the column parallel to the V-shaped guide rails of the left and right columns in the vertical and vertical adjustment directions of the crossbeam, respectively. A precision measuring block for the roller bearing assembly size spacing is placed between the V-shaped guide rail of the crossbeam and the V-shaped guide rail of the right column. By rotating the roller screw on the adjustment device, the crossbeam moves forward and backward along the vertical adjustment direction of the adjustment device. By rotating the adjusting screw in the thrust block of the adjusting seat on the moving seat, the crossbeam moves left and right along the horizontal adjustment direction of the adjustment device. Finally, the V-shaped guide rails of the crossbeam and the right column are both in close contact with the precision measuring block for the roller bearing assembly size spacing, thus obtaining the roller bearing assembly size spacing.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] To ensure the assembly accuracy of the crossbeam of a high-precision vertical coordinate boring machine, this invention allows for fine-tuning of the crossbeam's position in six directions—lateral, longitudinal, vertical, and around the lateral, longitudinal, and vertical rotation directions—using an adjustment device. This ensures the dimensional spacing of the roller bearings between the V-shaped guide rails of the machine tool's left and right columns and the V-shaped guide rails of the crossbeam. Lateral movement is achieved through thrust screws at both ends of the rotating adjustment device's moving seat, which also serve as thrust stoppers. Longitudinal movement is achieved through a lead screw on the base of the rotating adjustment device. Vertical movement is achieved through fine-tuning screws on the rotating adjustment foot seat. Lateral and longitudinal rotations are primarily achieved by adjusting the fine-tuning screws on the two sets of adjustment device foot seats. Vertical rotation is primarily achieved by adjusting the lead screw assembly on the two sets of adjustment device base seats. This invention features a reasonable and simple structure, is safe and reliable in use, and effectively guarantees the assembly accuracy requirements of a high-precision vertical coordinate boring machine. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention in use;

[0021] Figure 2 This is an enlarged view of the invention in use;

[0022] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0023] Figure 4 This is a front view of the overall structure of the present invention;

[0024] Figure 5 This is a side view of the overall structure of the present invention;

[0025] Figure 6 This is a cross-sectional view of AA in the side view of the overall structure of the present invention;

[0026] Figure 7 This is a schematic diagram illustrating the principle of use of the present invention;

[0027] Figure 8 This is an enlarged view of part I in the schematic diagram of the principle of this invention;

[0028] Reference numerals: 1-Base, 2-Bearing support, 3-Roller screw, 4-Screw support bearing, 5-Bearing cap, 6-Spacer, 7-Locking nut, 8-Connecting sleeve, 9-Sleeve, 10-Tapered pin, 11-Screw seat, 12-Screw nut seat, 13-Support bearing, 14-Bearing clamp, 15-Top block, 16-Moving seat thrust block, 17-Adjusting screw, 18-Limit block, 19-Transverse linear guide, 20-Moving seat, 21-Longitudinal linear guide, 22-Adjusting seat, 23-Foot seat, 24-Fine adjustment screw, 25-T-block, 26-Adjusting seat thrust block, A-Crossbeam, B-Left column, C-Right column, D-Worktable, E-Bed, F-Adjusting device. Detailed Implementation

[0029] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0031] Example 1

[0032] like Figure 3-6As shown, this invention discloses a high-precision vertical coordinate boring machine crossbeam assembly and adjustment device, including a base 1 fixedly connected to the T-slot screw of the vertical coordinate boring machine worktable, a movable seat 20, and an adjusting seat 22. Two transverse linear guides 19 are provided on the base 1, the movable seat 20 is mounted on the base 1 via the linear guides 19, and two longitudinal linear guides 21 are provided on the movable seat 20. The adjusting seat 22 is mounted on the movable seat 20 via the longitudinal linear guides 21. A lead screw assembly is also provided between the two transverse linear guides 19, and the lead screw assembly is connected to the movable seat 20. The lead screw assembly includes a bearing support 2, a roller lead screw 3, and a lead screw seat 11. The lead screw seat 11 and the bearing support 2 are respectively located at the left and right ends of the base 1. One end of the roller lead screw 3 is inserted into the bearing support 2, and the other end is inserted into the lead screw seat 11. A lead screw nut seat 12 is provided below the movable seat 20, and the lead screw nut seat 12 is connected to the lead screw nut on the roller lead screw 3. Slider blocks are respectively provided on the transverse linear guide 19 and the longitudinal linear guide 21. The bottom of the moving seat 20 is fixedly connected to the slider of the transverse linear guide 19 with screws, and the adjusting seat 22 is fixedly connected to the slider of the longitudinal linear guide 21 with screws. Two foot seats 23 are provided on the adjusting seat 22. The two ends of the foot seats 23 are fixed to the adjusting seat 22 by screws screwed into the T-shaped blocks 25 on the adjusting seat 22. A fine-tuning screw 24 is provided on the top of the foot seat 23, and the fine-tuning screw 24 is connected to the threaded hole of the foot seat 23. Moving seat thrust blocks 16 and limit blocks 18 are also provided on both sides of the base 1. The moving seat thrust blocks 16 are located on both sides of the moving seat 20, and the limit blocks 18 are located on the outside of the two moving seat thrust blocks 16. Adjusting seat thrust blocks 26 are provided on both sides of the moving seat. Adjusting seat thrust blocks 26 are located on both sides of the adjusting seat. Adjusting screws 17 and top blocks 15 are provided on both moving seat thrust blocks 16 and adjusting seat thrust blocks 26.

[0033] One end of the roller screw 3 is connected to the bearing support 2 via the screw support bearing 4. The outer ring of the bearing support 2 is fixed with the bearing cap 5 by the spacer 6 and the locking nut 7. The spacer 6 is clearance-fitted with one end of the roller screw 3 and fits against the inner ring plane of the screw support bearing 4. The locking nut 7 fits against the surface of the spacer 6 and is used to lock the components. The sleeve 8, sleeve 9 and tapered pin 10 are assembled with the roller screw 3 and locked. The sleeve 8 and sleeve 9 are clearance-fitted with one end of the roller screw 3, and the tapered pin 10 fits the hole surface of the sleeve 9 and is locked. The other end of the roller screw 3 is connected to the screw seat 11 via the support bearing 13. The support bearing 13 and the other end of the roller screw 3 are transition-fitted with the screw seat 11. The bearing clamp 14 is installed in the screw seat 11 to lock the two ends of the outer circle of the support bearing 13. The bearing support 2 is fixedly connected to the right end of the base 1 by a cylindrical hexagonal head screw.

[0034] Example 2

[0035] This invention also discloses a method for assembling and adjusting the crossbeam of a high-precision vertical coordinate boring machine, such as... Figure 1 , 2 As shown, two sets of high-precision vertical coordinate boring machine crossbeam assembly and adjustment devices are provided. When assembling the high-precision vertical coordinate boring crossbeam A, the two sets are arranged side by side laterally on the vertical coordinate worktable D. The adjustment device includes a base 1, which is connected and fixed to the T-slot screws of the vertical coordinate boring machine worktable D.

[0036] like Figure 1 As shown, (1) is the coordinate system for the beam adjustment direction, where X1 is the horizontal adjustment direction of the beam, Y1 is the vertical adjustment direction of the beam, Z1 is the vertical adjustment direction of the beam, RX1 is the horizontal rotation adjustment direction of the beam, RY1 is the vertical rotation adjustment direction of the beam, and RZ1 is the vertical rotation adjustment direction of the beam. (2) is the coordinate system for the adjustment device adjustment direction, where X is the horizontal adjustment direction of the device, Y is the vertical adjustment direction of the device, Z is the vertical adjustment direction of the device, RX is the horizontal rotation adjustment direction of the device, RY is the vertical rotation adjustment direction of the device, and RZ is the vertical rotation adjustment direction of the device. H1 and H2 are the distance dimensions between the V-shaped guide rail of the left column B and the V-shaped guide rail on the left side of the beam A.

[0037] The movable seat 20 is assembled with the slider of the transverse linear guide rail 19 and fastened with screws. The lead screw nut seat 12 is assembled with the movable seat 20 and fastened with screws. The lead screw nut on the roller lead screw 3 is assembled with the lead screw nut 12 and fastened with screws. By rotating the roller lead screw 3, the movable seat 20 can move back and forth in the longitudinal adjustment direction Y of the adjustment device. The two longitudinal linear guide rails 21 are assembled with the movable seat 20 and fastened with screws. The adjusting seat 22 is assembled with the slider of the longitudinal linear guide rail 21 and fastened with screws. By rotating the adjusting seat thrust block 26 on the movable seat 20, the movable seat 20 can move back and forth in the longitudinal adjustment direction Y of the adjustment device. The adjusting screw 17 in the middle can realize the left and right movement of the adjusting seat 22 along the horizontal adjustment direction X of the adjusting device; the foot seat 23 is installed on the adjusting seat 22 and is connected and fastened by screws and T-blocks 25 through the T-slot; the fine adjustment screw 24 is threadedly connected to the foot seat 23; by adjusting the fine adjustment screw 24, the crossbeam A can move up and down along the vertical adjustment direction Z of the adjusting device; the adjusting seat 22 is equipped with two sets of foot seat 23 and fine adjustment screw 24 assemblies; the adjusting seat thrust block 26 is installed on the moving seat 20, and the adjusting screw 17 and the top block 15 are installed to fix the moving seat 20.

[0038] Working principle of the invention:

[0039] like Figure 1-8Two sets of high-precision vertical coordinate boring machine crossbeam assembly and adjustment devices are used. When assembling the high-precision vertical coordinate boring crossbeam A, the two sets are arranged side by side horizontally on the vertical coordinate worktable D. The left column B and right column C are respectively assembled with the machine bed. Through process methods, the central axis of the V-shaped guide rail of the left column B and right column C is made coplanar along the transverse X1 direction of the crossbeam A. The crossbeam A to be assembled is supported on the fine-adjusting screws 24 of the two sets of adjustment devices, forming a four-point support configuration. According to the assembly process precision requirements, the roller screws 3 in the two sets of adjustment devices are rotated respectively to adjust the position of the crossbeam around the vertical rotation direction RZ1, so that the reference plane of the crossbeam A in the transverse X1 direction is coplanar and parallel to the central axis of the V-shaped guide rail of the left column B and right column C.

[0040] Place a level on the crossbeam A. By rotating the fine-tuning screws 24 in the two sets of adjustment devices, the crossbeam A moves up and down along the vertical adjustment direction Z of the adjustment device. By rotating the fine-tuning screws 24, the crossbeam rotates along the horizontal rotation direction RX1 or the crossbeam rotates along the longitudinal rotation direction RY1, so that the V-shaped guide rail on the side where the crossbeam A is assembled with the column is parallel to the V-shaped guide rails of the left column B and the right column C in the longitudinal adjustment direction Y1 and the vertical adjustment direction Z1 of the crossbeam, respectively.

[0041] At this time, a precision measuring block for the roller bearing assembly dimension spacing is placed between the V-shaped guide rail of the crossbeam A and the V-shaped guide rail of the right column C. By rotating the roller screw 3 on the adjusting device, the crossbeam A is moved forward and backward along the longitudinal adjustment direction Y of the adjusting device. By rotating the adjusting screw 17 in the adjusting seat thrust block 26 on the moving seat 20, the crossbeam A is moved left and right along the lateral adjustment direction X of the adjusting device. Finally, the V-shaped guide rails of the crossbeam A and the right column C are both in close contact with the precision measuring block for the roller bearing assembly dimension spacing, thus obtaining the roller bearing assembly dimension spacing.

[0042] According to the aforementioned method, by using the adjustment device, the position of the crossbeam A in six directions can be adjusted, and the crossbeam and the adjustment device move synchronously in the lateral and longitudinal directions. At this time, the V-shaped guide rail of the left column B and the V-shaped guide rail of the crossbeam A form a distance H1 and H2. The left column B is adjusted with the values ​​of H1 and H2 so that the distance between the V-shaped guide rail of the left column B and the V-shaped guide rail of the crossbeam A meets the roller bearing assembly dimension distance tolerance, so that H1 = H2, thereby meeting the roller bearing assembly requirements.

[0043] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A high-precision vertical coordinate boring machine crossbeam assembly and adjustment device, characterized in that, The system includes a base (1) fixedly connected to the T-slot screw of the worktable of a vertical coordinate boring machine, a movable seat (20), and an adjusting seat (22); the base (1) is provided with two transverse linear guides (19), the movable seat (20) is mounted on the base (1) via the linear guides (19), the movable seat (20) is provided with two longitudinal linear guides (21), and the adjusting seat (22) is mounted on the movable seat (20) via the longitudinal linear guides (21); a lead screw assembly is also provided between the two transverse linear guides (19), and the lead screw assembly is connected to the movable seat (20); The transverse linear guide (19) and the longitudinal linear guide (21) are respectively provided with sliders. The bottom of the moving seat (20) is fixedly connected to the slider of the transverse linear guide (19) with screws, and the adjusting seat (22) is fixedly connected to the slider of the longitudinal linear guide (21) with screws. The adjusting seat (22) is provided with two foot seats (23). The two ends of the foot seats (23) are fixed on the adjusting seat (22) by screws into the T-shaped blocks (25) on the adjusting seat (22). A fine adjustment screw (24) is provided directly above the foot seat (23). The fine adjustment screw (24) is connected to the threaded screw hole of the foot seat (23). The base (1) is also provided with a moving seat thrust block (16) and a limiting block (18) on both sides. The moving seat thrust block (16) is provided on both sides of the moving seat (20), and the limiting block (18) is provided on the outside of the two moving seat thrust blocks (16). The moving seat is provided with an adjusting seat thrust block (26) on both sides. The adjusting seat thrust block (26) is provided on both sides of the adjusting seat. The moving seat thrust block (16) and the adjusting seat thrust block (26) are both provided with adjusting screws (17) and top blocks (15). The adjustment device includes two sets, which are arranged side by side on the worktable of the vertical coordinate boring machine. The lead screw assembly includes a bearing support (2), a roller lead screw (3), and a lead screw seat (11). The lead screw seat (11) and the bearing support (2) are respectively located at the left and right ends of the base (1). The bearing support (2) is fixedly connected to the right end of the base (1) by a cylindrical hexagonal head screw. One end of the roller lead screw (3) is inserted into the bearing support (2), and the other end is inserted into the lead screw seat (11). A lead screw nut seat (12) is provided below the movable seat (20), and the lead screw nut seat (12) is connected to the lead screw nut on the roller lead screw (3); One end of the roller screw (3) is connected to the bearing support (2) via the screw support bearing (4). The outer ring of the bearing support (2) is fixed with a bearing cap (5) by a spacer (6) and a locking nut (7). The spacer (6) is clearance-fitted with one end of the roller screw (3) and fits against the inner ring plane of the screw support bearing (4). The locking nut (7) fits against the spacer (6) and is used to lock the components. A coupling sleeve (8), a sleeve (9), and a tapered pin (10) are used. The roller screw (3) is assembled and pinned together. The sleeve (8) and sleeve (9) are connected to one end of the roller screw (3) with clearance fit. The tapered pin (10) is fitted and pinned to the hole surface of the sleeve (9). The other end of the roller screw (3) is connected to the screw seat (11) through the support bearing (13). The support bearing (13) and the screw seat (11) are in transition fit. The bearing clamp (14) is installed in the screw seat (11) to block the two ends of the outer circle of the support bearing (13).

2. A method for assembling and adjusting the crossbeam of a high-precision vertical coordinate boring machine, characterized in that, The high-precision vertical coordinate boring machine crossbeam assembly and adjustment device according to claim 1 includes: when assembling the high-precision vertical coordinate boring crossbeam (A), two sets are arranged side by side and laterally on the vertical coordinate worktable (D); the left column (B) and the right column (C) are respectively assembled with the bed, so that the V-shaped guide rail center axis of the left column (B) and the right column (C) are coplanar along the transverse adjustment direction (X1) of the crossbeam, and the crossbeam (A) to be assembled is supported on the fine adjustment screws (24) of the two sets of adjustment devices to form a total of four-point support; A level is placed on the crossbeam (A). By rotating the fine-tuning screws (24) in the two sets of adjustment devices, the crossbeam (A) moves up and down along the vertical adjustment direction (Z) of the adjustment device. The rotation of the fine-tuning screws (24) also rotates the crossbeam along the horizontal rotation direction (RX1) or the longitudinal rotation direction (RY1), making the V-shaped guide rail on the side where the crossbeam (A) is assembled with the column parallel to the V-shaped guide rails of the left column (B) and right column (C) in the longitudinal adjustment direction (Y1) and the vertical adjustment direction (Z1) of the crossbeam, respectively. A precision measuring sample block for the roller bearing assembly size spacing is placed between the V-shaped guide rail of the first column (C) and the V-shaped guide rail of the right column (C). By rotating the roller screw (3) on the adjustment device, the crossbeam (A) moves forward and backward along the longitudinal adjustment direction (Y) of the adjustment device. By rotating the adjusting screw (17) in the adjusting seat thrust block (26) on the moving seat (20), the crossbeam (A) moves left and right along the transverse adjustment direction (X) of the adjustment device. Finally, the crossbeam (A) and the V-shaped guide rail of the right column (C) are both in close contact with the precision measuring sample block for the roller bearing assembly size spacing, thus obtaining the roller bearing assembly size spacing.

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