A large-scale flap machining center flap precision adjusting method

Abstract

The present application relates to the technical field of installation and debugging of plate turning machining center, and discloses a large plate turning machining center plate turning precision adjustment method, comprising the following steps: step S1, pad iron pre-installation: installing adjustable pad iron on the back of the workbench base, and installing bottom pad iron on the bottom of the workbench base; step S2, initial adjustment: adjusting the adjustable pad iron to the middle value of the full stroke; adjusting the bottom pad iron to the three-equal-part strength state; ensuring that the foot rod is located at the center of the workbench base hole; and adjusting the adjustable pad iron on the upper end of the workbench base to be close to the two sides, wherein the present application adopts the adjustment sequence from the middle to the two sides and the corresponding upper and lower adjustment sequence, avoids stress concentration, solves the precision deviation problem caused by the chaotic existing adjustment sequence, clearly defines the torque parameters and precision standards of each link, avoids human operation differences, significantly improves the repeated precision, combines multiple detections of the theodolite, collimator and electronic level, sets a three-day continuous re-inspection mechanism, effectively avoids precision drift, and ensures the long-term operation stability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of installation and debugging technology for flip-plate machining centers, and in particular to a method for adjusting the flip-plate accuracy of a large flip-plate machining center. Background Technology

[0002] The flip plate in a large flip plate machining center is the core load-bearing and moving component of the equipment, and its installation accuracy directly determines the machining center's processing accuracy, dynamic stability, and service life. Currently, the following problems exist in the existing flip plate installation process: 1. There is no standardized procedure for adjusting the shims, relying heavily on operator experience, resulting in a chaotic adjustment sequence and potential stress concentration in the base; 2. There is no unified standard for torque control, leading to inconsistent tightening forces between the nuts and shims, which can easily cause accuracy drift; 3. Straightness and levelness are not detected synchronously, resulting in a low accuracy compliance rate and poor repeatability after adjustment; 4. There is a lack of long-term stability verification, making it prone to accuracy deviations in the short term after installation, failing to meet the stringent accuracy requirements of high-end manufacturing. These problems severely restrict the performance of large flip plate machining centers, necessitating a standardized and precise adjustment method. Therefore, this project was developed to address these issues in depth. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of low precision, poor repeatability, and insufficient stability of existing flip-plate adjustment methods in large-scale flip-plate processing centers, and to design a flip-plate precision adjustment method for large-scale flip-plate processing centers.

[0004] The technical solution of the present invention to achieve the above objectives is as follows: a method for adjusting the flipping accuracy of a large flipping machining center, comprising the following steps:

[0005] Step S1, Pre-installation of shims: Precisely install adjustable shims on the back wall of the workbench base, and install bottom shims at the bottom of the workbench base;

[0006] Step S2, Initial Adjustment: Adjust the adjustable shims to the middle value of the full stroke; adjust the bottom shims to the three-equal tension position; ensure that the anchor rod is located in the center of the workbench base hole; tighten the adjustable shims at both ends of the upper end of the workbench base;

[0007] Step S3, Initial Alignment of the Base: Use a theodolite to check and adjust the verticality of the workbench base and the material track; use a level to check and adjust the height difference between the two ends of the workbench base, and then tighten the adjustable shims at both ends of the lower side of the workbench base.

[0008] Step S4, Setting the slider and horizontal reference: Install two right-angled plates on the slider of the guide rail below the worktable base, align them along the X-axis direction, and establish the X-axis reference; Place two levels horizontally and vertically on the slider, adjust the bottom pads, and make the level display control the total length within 2 divisions to establish the horizontal reference.

[0009] Step S5, Auxiliary component installation: Install the connecting plate and iron straightedge, and repeatedly place the electronic vertical level three times at the fixed position in the middle of the iron straightedge, with each reading deviation ≤0.001 degrees;

[0010] Step S6, Locking the intermediate shim and establishing the reference: Install the collimator on the right-angle bending plate and select the lower shim located in the middle of the lower side of the workbench base as the intermediate reference for adjustment.

[0011] Step S7, Adjustment of the shims on both sides and straightness: Using the lower shim in the middle as a reference, adjust to both sides in sequence; during the adjustment process, check the straightness of the lower guide rail with a collimator;

[0012] Step S8, Adjustment of remaining shims and upper guide rail: According to the torque requirements and accuracy standards of Step 6 and Step 7, adjust the lower shims on both sides of the middle reference and the corresponding upper shims in sequence to ensure the force balance of the worktable base; when the straightness of the lower guide rail is qualified and the error is controlled within 0.03mm, check the straightness of the upper guide rail.

[0013] Step S9, Accuracy Confirmation and Re-inspection: Use an electronic vertical level to comprehensively check the horizontal status of the workbench base, ensuring that the overall backward tilt is 0.003 degrees and the total length error does not exceed 0.001 degrees; after the horizontality and straightness are qualified, record all data in detail and save them; re-inspect the horizontality and straightness on the second day, and if there are any cases that exceed the standard requirements, make minor adjustments; if there are no changes after three consecutive days of re-inspection, it means that the installation accuracy of the workbench base is stable and meets the standard, and the adjustment work is completed.

[0014] The number of adjustable shims is 36, including 18 upper shims and 18 lower shims, and the number of bottom shims is 10.

[0015] In steps S2 and S3 above, the clamping torque of the adjustable pads at both ends of the workbench base is 50 N·m, and the state is not locked.

[0016] In step S3 above, the verticality deviation between the workbench base and the material track is ≤0.02 / 1000, and the height difference between the two ends of the workbench base is adjusted to within ±0.01mm.

[0017] In step S5 above, the connecting plate is placed between two adjacent sliders, and the iron ruler is placed directly on the slider. An M16 screw is installed at the lower end of the iron ruler to prevent it from slipping off. The pressure plate is used to press the upper and lower ends of the iron ruler to ensure that the iron ruler and the slider fit tightly without gaps, thus ensuring the detection accuracy.

[0018] In step S6 above, during the process of adjusting the lower shim with a wrench, first tighten the corresponding adjusting nut with a torque of 200 N·m, then tighten the shim nut with a torque of 50 N·m; let it stand for 5 minutes, and finally tighten the adjusting nut with a torque of 400 N·m and the shim nut with a torque of 100 N·m; after completion, check all adjustable shims and nuts one by one to ensure that the adjustable shims and nuts in other positions are in a free and loose state to avoid additional stress affecting accuracy.

[0019] In step S7 above, using the middle lower shim 10 as a reference, lower shims 9 and 11 are adjusted sequentially to both sides. During the adjustment process, the straightness of the lower guide rail is checked by a collimator. The straightness of the lower guide rail needs to be ensured that the straightness of both the X-direction (front of the guide rail) and the Y-direction (side of the guide rail) is controlled within 0.01mm. At the same time, the upper guide rail is checked by an electronic vertical level to ensure that the backward tilt angle of the upper guide rail reaches 0.003 degrees.

[0020] In step S7 above, if the straightness in the X direction is not up to standard, keep lower shims nine, ten, and eleven stationary. Apply force to the adjusting nuts of lower shims one and eighteen, making multiple fine adjustments, each time applying 50 N·m of force. After each fine adjustment, check the workbench base. Move both ends backward until the straightness in the X direction is up to standard. At this point, lower shims nine, ten, and eleven are under tension, and the remaining adjustable shims are loosened to avoid stress interference. If the straightness in the Y direction is not up to standard, adjust the bottom shims so that they are higher in the middle and lower at both ends. Use a dial indicator to check the height difference, which should be controlled within the range of 0.03-0.04 mm.

[0021] In step S8 above, keep lower shims nine, ten, and eleven stationary, and adjust the corresponding upper shims nine, ten, and eleven. This adjustment must be checked with an electronic vertical level to ensure that the upper end tilts back by 0.003 degrees and the three points have the same value. After ensuring uniform accuracy of the upper guide rail, adjust lower shims eight, twelve, seven, thirteen, six, fourteen, five, fifteen, sixteen, three, seventeen, two, one, and eighteen in sequence. While adjusting the lower shims, adjust the corresponding upper shims. Adjust the upper and lower shims accordingly to ensure that the workbench base is under balanced force.

[0022] A method for adjusting the flipping accuracy of a large flipping machining center, using the technical solution of the present invention, has the following advantages:

[0023] 1. Process standardization: Adopt the adjustment sequence from the middle to both sides and top to bottom to avoid stress concentration and solve the accuracy deviation problem caused by the chaotic adjustment sequence in the past;

[0024] 2. Controllable precision: Clearly define the torque parameters (e.g., initial lock of 200 N·m for adjusting nuts, final lock of 400 N·m for adjusting nuts, initial tension of 50 N·m for shim nuts, final tension of 100 N·m for shim nuts) and precision standards (e.g., X / Y straightness ≤ 0.01, horizontal tilt 0.003 degrees) for each stage, avoiding human error and significantly improving repeatability.

[0025] 3. High stability: Combining multiple detection methods such as theodolite, collimator, and electronic level, and setting up a three-day continuous re-inspection mechanism, it effectively avoids accuracy drift and ensures the long-term operational stability of the equipment;

[0026] 4. Easy to operate: No complicated special equipment is required, it is cost-effective and suitable for batch installation and debugging in large flip-plate processing centers. Attached Figure Description

[0027] Fig. 1 This is a schematic diagram of the front view of the workbench base described in this invention.

[0028] Fig. 2 This is a rear view structural diagram of the workbench base described in this invention.

[0029] Fig. 3 This is a side view of the workbench base of the present invention.

[0030] In the diagram: 1. Upper shim one; 2. Upper shim two; 3. Upper shim three; 4. Upper shim four; 5. Upper shim five; 6. Upper shim six; 7. Upper shim seven; 8. Upper shim eight; 9. Upper shim nine; 10. Upper shim ten; 11. Upper shim eleven; 12. Upper shim twelve; 13. Upper shim thirteen; 14. Upper shim fourteen; 15. Upper shim fifteen; 16. Upper shim sixteen; 17. Upper shim seventeen; 18. Upper shim eighteen; 19. Lower shim one; 20. Lower shim two; 21. Lower shim three; 22. Lower shim four; 23. Lower shim... 24. Lower shim iron 5; 25. Lower shim iron 6; 26. Lower shim iron 7; 27. Lower shim iron 8; 28. Lower shim iron 9; 29. ​​Lower shim iron 10; 30. Lower shim iron 11; 31. Lower shim iron 13; 32. Lower shim iron 14; 33. Lower shim iron 15; 34. Lower shim iron 16; 35. Lower shim iron 17; 36. Lower shim iron 18; 37. Bottom shim iron; 38. Upper guide rail; 39. Lower guide rail; 40. Slider; 41. Connecting plate; 42. Pressure plate; 43. Iron straightedge; 44. Electronic vertical level; 45. Workbench base. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art can connect the components in this case in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well known in the art. The following mainly introduces the working principle and process.

[0032] Example: Refer to the appendix of the instruction manual Figs. 1-3 It is known that, in order to solve the problems of low precision, poor repeatability, and insufficient stability of existing large-scale flip-plate machining center flip-plate adjustment methods, a standardized, precision-controllable, and highly stable method for adjusting the installation precision of large-scale flip-plate machining centers has been designed. The specific operation steps are as follows:

[0033] Step S1, Pre-installation of shims: Precisely install 36 adjustable shims on the back wall of the workbench base 45, including 18 upper shims and 18 lower shims. Correspondingly install 10 bottom shims 37 at the bottom of the workbench base 45 to ensure that all shims are installed in the correct positions without deviation or looseness.

[0034] Step S2, Initial Adjustment: Rotate the adjusting bolts of the 36 adjustable shims to adjust them to the middle value of the full stroke; use a feeler gauge to assist in the inspection and adjust the bottom shim 37 to the three-part tension state; use calipers to measure and ensure that the anchor rod is located in the center of the hole 45 in the workbench base; use a wrench to tighten the locking nuts of the shim 1 and the upper shim 18 on both sides of the upper end of the workbench base 45 to a torque of 50 N.M, and the state is not locked;

[0035] Step S3, Initial Alignment of the Base: Fix the theodolite next to the material track, adjust the theodolite lens so that the crosshairs are in contact with the side of the workbench base 45, check and adjust the perpendicularity of the workbench base 45 to the material track (deviation ≤0.02 / 1000); at the same time, use a level to check the height difference between the two ends of the workbench base 45 and adjust it to within ±0.01mm. Then tighten the locking nuts of the lower shims 19 and 36 at both ends of the lower side of the workbench base 45 with a torque of 50 N.M, and leave them unlocked.

[0036] Step S4, Setting up slider 40 and horizontal reference: Install two right-angled plates on slider 40 of guide rail 39 below worktable base 45, use a dial indicator to align along the X-axis, make the dial indicator reading zero, ensure the alignment result, and establish the X-axis reference; place two levels horizontally and vertically on slider 40, adjust the bottom shims 37, and make the level indicator display error controlled within 2 divisions (0.02 / 1000 per division), and establish the horizontal reference. The adjustment sequence of the bottom shims 37 is also from the middle to the sides.

[0037] Step S5, Auxiliary Component Installation: Install the connecting plate 41 and the iron ruler 43. The connecting plate 41 is placed between two adjacent sliders 40. The iron ruler 43 is placed directly on the slider 40. Install an M16 screw at the lower end of the iron ruler 43. The top of the M16 screw contacts the slider 40 to prevent the iron ruler 43 from slipping. Use the pressure plate 42 to press the upper and lower ends of the iron ruler 43 tightly. Use a feeler gauge to check that the iron ruler 43 and the slider 40 are tightly fitted without gaps. The gap between the iron ruler 43 and the slider 40 is ≤0.005mm to ensure the detection accuracy. Repeatedly place the electronic vertical level 44 three times at the fixed position in the middle of the iron ruler 43. The reading deviation is ≤0.001 degrees each time to confirm that the level is placed stably and the data is reliable.

[0038] Step S6, Tightening the intermediate shim and establishing the reference: Install a collimator on the right-angle bend plate, align it with the center of the lower shim 28, and select the lower shim 28 located at the middle of the lower side of the workbench base 45 as the adjustment intermediate reference. Adjust the shim 28 to both sides based on the adjustment intermediate reference to ensure uniform accuracy. Use a wrench to adjust the lower shim 28 to a tight state. First, tighten the corresponding adjusting nut with a torque of 200 N.M, and then tighten the shim nut with a torque of 50 N.M. Let it stand for 5 minutes, and finally tighten the adjusting nut with a torque of 400 N.M and the shim nut with a torque of 100 N.M. After completion, check all shims and nuts one by one to ensure that the shims and nuts in other positions are in a free and loose state to avoid additional stress affecting accuracy.

[0039] Step S7, Adjustment of Side Shims and Straightness: Using the middle lower shim 10 28 as a reference, adjust the lower shims 9 27 and 11 29 to both sides in sequence. During the adjustment, use a collimator to check the straightness of the lower guide rail 39 to ensure that the straightness of both generatrices in the X direction (front of the guide rail) and the Y direction (side of the guide rail) is controlled within 0.01. At the same time, use an electronic vertical level 44 to check the upper guide rail 38 so that the backward tilt angle of the upper guide rail 38 reaches 0.003 degrees, which meets the equipment accuracy requirements.

[0040] If the straightness in the X direction is not up to standard, keep the lower shims 927, 1028, and 1129 stationary. Apply force to the adjusting nuts of the lower shims 19 and 1836, making small adjustments in multiple steps, each time applying 50 N·m of force. After each adjustment, check the straightness in the X direction. Move the two ends of the workbench base 45 backward until the straightness in the X direction is up to standard. At this point, the lower shims 927, 1028, and 1129 will be under tension, while the other shims will be loose to avoid stress interference. If the straightness in the Y direction is not up to standard, adjust the bottom shim 37 so that it is higher in the middle and lower at both ends. Use a dial indicator to check the height difference, which should be controlled within the range of 0.03-0.04 mm.

[0041] Step S8: Adjustment of remaining shims and upper guide rail: Following the torque requirements and accuracy standards of Steps 6 and 7, keep lower shims 9 (27), 10 (28), and 11 (29) stationary. Adjust the corresponding upper shims 9 (9), 10 (10), and 11 (11). After adjustment, use an electronic vertical level 44 to ensure the upper end tilts backward by 0.003 degrees and the three points have the same value, ensuring uniform accuracy of the upper guide rail. Then, adjust lower shims 8 (26), 12 (30), 7 (25), 13 (31), 6 (24), 14 (32), 5 (23), 15 (33), 4 (22), 16 (34), 3 (21), 17 (35), 20 (20), 19 (19), and 18 (36) in sequence. Adjust the lower shims accordingly. Adjust the corresponding upper shims accordingly, that is, adjust the upper shims 8, 12, 7, 13, 6, 14, 5, 15, 4, 16, 3, 17, 2, 11, and 18 in sequence; adjust the upper and lower shims accordingly to ensure that the workbench base 45 is balanced under force;

[0042] Once the straightness of the lower guide rail 39 is qualified and the error is controlled within 0.03mm, install two right-angle bending plates and a collimator on the upper guide rail 38 to check the straightness of the upper guide rail 38. If the straightness of the upper guide rail 38 exceeds the standard requirement, combine the data graph of the collimator and the data of the electronic vertical level 44 to find the convex and concave points in the X and Y directions, and correct them by fine-tuning the bottom shim 37. After correction, re-check the straightness of the lower guide rail 39 to ensure that both are qualified (avoiding the accuracy deviation of the upper and lower guide rails).

[0043] Step S9, Accuracy Verification and Re-inspection:

[0044] The workbench base 45 was fully inspected using an electronic vertical level 44 to ensure that the overall backward tilt was 0.003 degrees and the total error did not exceed 0.001 degrees, thus ensuring stable horizontal accuracy. After both the horizontality and straightness were qualified, all data were recorded in detail and saved for future traceability. The horizontality and straightness were re-inspected on the second day. If any values ​​exceeded the standard requirements, minor adjustments were made. If there were no changes after three consecutive days of re-inspection, it indicated that the installation accuracy of the workbench base 45 was stable and met the standard, and the adjustment work was completed.

[0045] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts thereof embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A method for adjusting the flipping accuracy of a large flipping machining center, characterized in that, Includes the following steps: Step S1, Pre-installation of shims: Precisely install adjustable shims on the back wall of the workbench base, and install bottom shims at the bottom of the workbench base; Step S2, Initial Adjustment: Adjust the adjustable shims to the middle value of the full stroke; adjust the bottom shims to the three-equal tension position; ensure that the anchor rod is located in the center of the workbench base hole; tighten the adjustable shims at both ends of the upper end of the workbench base; Step S3, Initial Alignment of the Base: Use a theodolite to check and adjust the verticality of the workbench base and the material track; use a level to check and adjust the height difference between the two ends of the workbench base, and then tighten the adjustable shims at both ends of the lower side of the workbench base. Step S4, Setting the slider and horizontal reference: Install two right-angled plates on the slider of the guide rail below the worktable base, align them along the X-axis direction, and establish the X-axis reference; Place two levels horizontally and vertically on the slider, adjust the bottom pads, and make the level display control the total length within 2 divisions to establish the horizontal reference. Step S5, Auxiliary component installation: Install the connecting plate and iron straightedge, and repeatedly place the electronic vertical level three times at the fixed position in the middle of the iron straightedge, with each reading deviation ≤0.001 degrees; Step S6, Locking the intermediate shim and establishing the reference: Install the collimator on the right-angle bending plate and select the lower shim located in the middle of the lower side of the workbench base as the intermediate reference for adjustment. Step S7, Adjustment of the shims on both sides and straightness: Using the lower shim in the middle as a reference, adjust to both sides in sequence; during the adjustment process, check the straightness of the lower guide rail with a collimator; Step S8, Adjustment of remaining shims and upper guide rail: According to the torque requirements and accuracy standards of Step 6 and Step 7, adjust the lower shims on both sides of the middle reference and the corresponding upper shims in sequence to ensure the force balance of the worktable base; when the straightness of the lower guide rail is qualified and the error is controlled within 0.03mm, check the straightness of the upper guide rail. Step S9, Accuracy Confirmation and Re-inspection: Use an electronic vertical level to comprehensively check the horizontal status of the workbench base, ensuring that the overall backward tilt is 0.003 degrees and the total length error does not exceed 0.001 degrees; after the horizontality and straightness are qualified, record all data in detail and save them; re-inspect the horizontality and straightness on the second day, and if there are any cases that exceed the standard requirements, make minor adjustments; if there are no changes after three consecutive days of re-inspection, it means that the installation accuracy of the workbench base is stable and meets the standard, and the adjustment work is completed.

2. The method for adjusting the flipping accuracy of a large flipping machining center according to claim 1, characterized in that, The number of adjustable shims is 36, including 18 upper shims and 18 lower shims, and the number of bottom shims is 10.

3. The method for adjusting the flipping accuracy of a large flipping machining center according to claim 1, characterized in that, In steps S2 and S3, the tightening torque of the adjustable pads at both ends of the workbench base is 50 N·m, and the state is not locked.

4. The method for adjusting the flipping accuracy of a large flipping machining center according to claim 1, characterized in that, In step S3, the verticality deviation between the workbench base and the material track is ≤0.02 / 1000, and the height difference between the two ends of the workbench base is adjusted to within ±0.01mm.

5. The method for adjusting the flipping accuracy of a large flipping machining center according to claim 1, characterized in that, In step S5, the connecting plate is placed between two adjacent sliders, and the iron ruler is placed directly on the slider. An M16 screw is installed at the lower end of the iron ruler to prevent it from slipping. The pressure plate is used to press the upper and lower ends of the iron ruler to ensure that the iron ruler and the slider are tightly fitted without gaps, thus ensuring the detection accuracy.

6. The method for adjusting the flipping accuracy of a large flipping machining center according to claim 1, characterized in that, In step S6, during the process of adjusting the lower shim with a wrench, first tighten the corresponding adjusting nut with a torque of 200 N·m, and then tighten the shim nut with a torque of 50 N·m. Let it stand for 5 minutes, and finally tighten the adjusting nut with a torque of 400 N.M and the shim nut with a torque of 100 N.M. After completion, inspect all adjustable shims and nuts one by one to ensure that the adjustable shims and nuts in other positions are in a free and loose state to avoid additional stress affecting accuracy.

7. The method for adjusting the flipping accuracy of a large flipping machining center according to claim 1, characterized in that, In step S7, using the central lower shim 10 as a reference, lower shims 9 and 11 are adjusted sequentially to both sides. During the adjustment process, the straightness of the lower guide rail is checked using a collimator. The straightness of the lower guide rail needs to be ensured that the straightness of both the X-axis (front of the guide rail) and the Y-axis (side of the guide rail) is controlled within 0.01mm. At the same time, the upper guide rail is checked using an electronic vertical level to ensure that the backward tilt angle of the upper guide rail reaches 0.003 degrees.

8. The method for adjusting the flipping accuracy of a large flipping machining center according to claim 1, characterized in that, In step S7, if the straightness in the X direction is not up to standard, keep the lower shims nine, ten, and eleven stationary. Apply force to the adjusting nuts of the lower shims one and eighteen, and make fine adjustments in multiple steps, each time applying 50 N·m of force. After fine adjustments, check and move both ends of the workbench base backward until the straightness in the X direction is up to standard. At this time, the lower shims nine, ten, and eleven are under tension, and the other adjustable shims are loosened to avoid stress interference. If the straightness in the Y direction is not up to standard, adjust the bottom shim so that it is higher in the middle and lower at both ends. Use a dial indicator to check the height difference, and control the height difference within the range of 0.03-0.04mm.

9. The method for adjusting the flipping accuracy of a large flipping machining center according to claim 1, characterized in that, In step S8, keep lower shims nine, ten, and eleven stationary, and adjust the corresponding upper shims nine, ten, and eleven. This adjustment must be checked with an electronic vertical level to ensure that the upper end tilts backward by 0.003 degrees and the three points have the same value. After ensuring uniform accuracy of the upper guide rail, adjust lower shims eight, twelve, seven, thirteen, six, fourteen, five, fifteen, sixteen, three, seventeen, two, one, and eighteen in sequence. While adjusting the lower shims, adjust the corresponding upper shims. Adjust the upper and lower shims accordingly to ensure that the workbench base is under balanced force.

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