Tool and method for detecting gap between gear and rack of laser cutting machine

Abstract

The invention provides a laser cutting machine gear rack gap detection tool and a detection method, relates to the field of laser cutting machines, and aims to solve the problem of insufficient measurement precision caused by the fact that the fixing mode of a measuring disc and a speed reducer is different from that of an actual servo motor in the current gap detection process. A flange bolt hole of the tool is matched with a preset connecting hole position of a servo motor in butt joint with the input end of the speed reducer, and the fixing shaft is in butt joint with a coupler at the input end of the speed reducer, so that the connecting mode of the tool and the speed reducer is highly consistent with the mounting mode of the actual servo motor, and the meshing state of a gear and a rack under the actual working condition can be simulated more truly; measurement errors caused by different connection modes are avoided, so that the accuracy of meshing clearance measurement is improved.

Description

Technical Field

[0001] The present invention relates to the field of laser cutting machines, and in particular to a gear and rack clearance detection tool and a detection method for a laser cutting machine. Background Art

[0002] The transmission part of the laser cutting machine is the core component of the machine. The control of transmission accuracy is related to the quality, lifespan, and operating accuracy of the machine. During the assembly process of the laser cutting machine, the meshing clearance between the gear and the rack is adjusted by pressing the solder wire. This method is as follows: place the solder wire on the tooth surface between the two ends of the tooth width, push the crossbeam by hand, and make the reducer gear on the crossbeam rotate in a circle on the rack, thereby flattening the solder wire. Then use a micrometer to measure the thickness of the solder wire after being squeezed and compare it with the value specified in the factory. If the value is less than the specified value, it means that the meshing clearance is small, so the reducer gear should be moved away from the rack. If the value is greater than the specified value, it means that the meshing clearance is large, so the reducer gear should be moved closer to the rack.

[0003] A Chinese patent (publication number CN 212931283U, publication date 20210409) discloses a laser cutting machine meshing clearance measuring tool. A measuring disc is fixedly connected to the input end of the reducer, and a limit plate is detachably connected to the measuring disc. A measuring instrument for measuring the meshing clearance is provided on one side of the sliding direction of the reducer. By gently pushing the crossbeam back and forth and fixing the measuring disc, the measuring instrument measures the overall moving range of the crossbeam and the reducer, and reflects the meshing clearance size between the gear and the rack according to the size of the measured value; however, the fixing method of the measuring disc and the input end of the reducer is different from that of the actual servo motor, which affects the measurement accuracy of the meshing clearance; in addition, since the gear and rack may have a large difference in parallelism, if the measuring point is selected at random during detection, after the measurement is met at the low point, the clearance may not meet the requirements when the servo motor runs to the high point, causing the gear rack to jam and damage related components of the reducer. Summary of the Invention

[0004] The purpose of the present invention is to address the defects of the prior art and provide a laser cutting machine gear rack clearance detection tool and detection method, which adopts a flange and a fixed shaft to simulate the structure of the servo motor output end, matches the flange bolt hole of the tool with the connection hole position of the preset docking servo motor at the reducer input end, and fixes the shaft to the reducer input end coupling, so that the connection method between the tool and the reducer is highly consistent with the actual installation method of the servo motor, can more realistically simulate the meshing state of the gear and rack under actual working conditions, avoid measurement errors caused by different connection methods, and thus improve the accuracy of meshing clearance measurement.

[0005] The first object of the present invention is to provide a tool for detecting the clearance between the gear and rack of a laser cutting machine, which adopts the following scheme: It includes a flange and a fixed shaft. One end of the fixed shaft is coaxially fixed to one end of the docking flange. The edge of the flange is provided with multiple bolt holes distributed circumferentially around its axis. The distribution positions of the bolt holes match the connection holes of the servo motor preset at the input end of the reducer. The fixed shaft is used to dock the coupling at the input end of the reducer.

[0006] Furthermore, a positioning protrusion is provided between the flange and the fixed shaft. The positioning protrusion is raised relative to one end of the flange, and the positioning protrusion serves as a stop to cooperate with the positioning groove on the reducer.

[0007] Furthermore, a through slot is provided on one end of the flange away from the fixed shaft, and the through slot serves as a weight-reducing structure.

[0008] A second object of the present invention is to provide a method for detecting the clearance between a gear and a rack of a laser cutting machine, using the tooling for detecting the clearance between a gear and a rack of a laser cutting machine described in the first object, comprising: The reducer is arranged on the crossbeam through the reducer mounting plate. The reducer mounting plate is moved to the point where the difference in parallelism between the guide rail and the rack is the largest, and the tooth at the output end of the reducer where the radial runout is the largest is meshed with the rack. Install the flange on the reducer, fix the shaft to the coupling, assemble the screws after matching the bolt holes on the flange with the connection holes, and then tighten the coupling to lock the gear position; Push the beam where the reducer is located back and forth, and measure the movement of the beam along the guide rail; Compare the activity amount and the backlash setting value to determine whether it meets the setting requirements.

[0009] Furthermore, if the amount of movement is greater than the set value of the reverse clearance, it is determined that the setting requirements are not met, the relative position of the reducer mounting plate and the beam is adjusted, and the amount of movement of the beam along the guide rail is locked and measured again.

[0010] Furthermore, adjusting the relative position of the reducer mounting plate and the crossbeam includes: adjusting the position of the reducer mounting plate relative to the crossbeam along the guide rail direction and / or along the direction perpendicular to the guide rail direction.

[0011] Furthermore, if the amount of movement is less than or equal to the reverse clearance setting value, it is judged that the setting requirements are met, the relative position of the reducer mounting plate and the beam is maintained, the flange and the fixed shaft are removed, the gears are allowed to rotate freely, and the meshing tightness is tested.

[0012] Furthermore, the meshing tightness detection includes: Take the test wire and insert it into the high point of the gear rack, push the crossbeam to make the gear move along the rack, and press out multiple sheet parts on the test wire; Measure the thickness of the sheet part and compare it with the set thickness value to determine whether it meets the requirements; If not, adjust the relative position of the reducer mounting plate and the crossbeam until it meets the requirements; If it meets the requirements, the test is completed.

[0013] Furthermore, the adjustment of the relative position of the reducer mounting plate and the crossbeam includes: when the thickness of the sheet portion exceeds the thickness setting value, reducing the gear rack meshing clearance; when the thickness of the sheet portion is less than the thickness setting value, increasing the gear rack meshing clearance.

[0014] Furthermore, the measuring tool adopts a dial indicator, the dial base is fixed on the bed or the guide rail, and the needle is pressed into the set length and hits the beam or a component that moves synchronously with the beam to measure the movement of the beam along the guide rail.

[0015] Compared with the prior art, the present invention has the following advantages and positive effects: In order to solve the problem of insufficient measurement accuracy caused by the different fixing methods of the measuring disk and the reducer in the current gap detection process, a flange and a fixed shaft are used to simulate the structure of the servo motor output end, and the flange bolt holes of the tooling are matched with the connection holes of the servo motor preset at the input end of the reducer. The fixed shaft is connected to the coupling at the input end of the reducer, so that the connection method between the tooling and the reducer is highly consistent with the installation method of the actual servo motor. It can more realistically simulate the meshing state of the gear and rack under actual working conditions, avoid measurement errors caused by different connection methods, and thus improve the accuracy of meshing gap measurement.

[0016] A positioning protrusion is set between the flange and the fixed shaft, and the protrusion serves as a stop to cooperate with the positioning groove on the reducer, which can make the installation positioning of the tooling and the reducer more accurate. On the one hand, the flange matches the connection hole position of the preset servo motor on the reducer to achieve positioning, and the cooperation between the stop and the positioning groove improves the installation accuracy from another angle. The two complement each other, reduce the deviation during tooling installation, and ensure the reliability of detection.

[0017] To address the difficulties of existing detection methods in precise quantification, complexity, and error-proneness, the gear rack backlash and meshing tightness detection process has been quantified. Through specific numerical measurements (such as crossbeam movement and the thickness of the test wire sheet) and comparisons (with set values), the judgment criteria are clarified, changing the previous fuzzy state of relying on manual experience, thereby improving the accuracy and reliability of detection. Precise adjustments are also made at multiple stages. For example, based on the backlash and meshing tightness measurement results, the relative position of the reducer mounting plate and the crossbeam is adjusted in the direction of the guide rail and perpendicular to the guide rail. This ensures that the gear rack achieves optimal meshing after assembly, thereby improving the assembly accuracy of the laser cutting machine's transmission components.

[0018] First install the reducer on the crossbeam and move it to the point where the difference in parallelism between the guide rail and the rack is the largest, so that the teeth at the point where the radial runout of the gear is the largest engage with the rack, simulating the most unfavorable working conditions in actual operation, thereby reducing damage caused by the large difference in parallelism between the guide rail and the rack.

[0019] After the backlash test is complete, insert the test wire to test the meshing tightness. Push the crossbeam to move the gears, measure the thickness of the extruded sheet of test wire, and compare it with the set value. Based on the result, adjust the gear rack meshing clearance until it meets the requirements. This precisely controls the backlash and meshing tightness of the gear rack, effectively avoiding problems such as reduced cutting accuracy and equipment vibration caused by improper clearance, as well as increased wear caused by excessive or insufficient meshing tightness. This extends the equipment life and improves the cutting quality and operational stability of the laser cutting machine.

[0020] A set of standardized testing processes and operating methods is provided so that both new and experienced employees can follow the process, reducing dependence on the experience of assembly workers, ensuring the consistency of test results, improving production efficiency, and reducing quality problems caused by personnel changes or operating differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 Schematic diagram of the structure of the gear rack clearance detection tool for the laser cutting machine in one or more embodiments of the present invention.

[0023] Figure 2 Schematic diagram of a through groove provided on a flange in one or more embodiments of the present invention.

[0024] Figure 3 This is a schematic diagram of a reducer installed on a beam in one or more embodiments of the present invention.

[0025] Figure 4 Schematic diagram of a servo motor and a reducer in one or more embodiments of the present invention.

[0026] Figure 5 Schematic diagram of a flange-matched reducer in one or more embodiments of the present invention.

[0027] Figure 6 Schematic diagram of a reducer and an internal coupling in one or more embodiments of the present invention.

[0028] Figure 7 Schematic diagram of the relative positions of the guide rail and the rack in one or more embodiments of the present invention.

[0029] Figure 8 Schematic diagram of a rack meshing with a gear in one or more embodiments of the present invention.

[0030] Figure 9 Schematic diagram of the reducer and beam mounting surface in one or more embodiments of the present invention.

[0031] Figure 10 This is a schematic diagram of a reducer arranged on a beam mounting surface in one or more embodiments of the present invention.

[0032] Figure 11 Schematic diagram of the distribution positions of measuring tools in one or more embodiments of the present invention.

[0033] Figure 12 Schematic diagram of the moving direction of the push beam in one or more embodiments of the present invention.

[0034] Figure 13 Schematic diagram of arranging detection wires in one or more embodiments of the present invention.

[0035] Figure 14 Schematic diagram of the state after the detection wire is pressed out of the sheet portion in one or more embodiments of the present invention.

[0036] Among them, 1. Fixed shaft; 2. Positioning protrusion; 3. Flange; 4. Bolt hole; 5. Through slot; 6. Beam; 7. Servo motor; 8. Reducer; 9. Gear; 10. Reducer mounting plate; 11. Coupling; 12. Dust cap; 13. Guide rail; 14. Rack; 15. Guide rail pressure block; 16. Bed; 17. Beam mounting surface; 18. Clamping block; 19. Screw; 20. Measuring tool; 21. Detection wire. DETAILED DESCRIPTION

[0037] Example 1 In a typical embodiment of the present invention, Figure 1-Figure 2 As shown, a tool for detecting the clearance between the gear and rack of a laser cutting machine is provided.

[0038] The fixing method of the measuring disk of the existing measuring tool and the input end of the reducer 8 is different from that of the actual servo motor 7, which affects the measurement accuracy of the meshing clearance. Based on this, the present embodiment provides a gear rack clearance detection tool for a laser cutting machine, and sets a flange 3 and a fixed shaft 1. The bolt hole 4 of the flange 3 of the tool is matched with the connection hole position of the preset docking servo motor 7 at the input end of the reducer 8, and the fixed shaft 1 is docked with the coupling 11 at the input end of the reducer 8, so that the connection method between the tool and the reducer 8 is consistent with the installation method of the actual servo motor 7, thereby truly simulating the meshing state of the gear 9 and the rack 14 under actual working conditions, avoiding measurement errors caused by different connection methods, and thus improving the accuracy of meshing clearance measurement.

[0039] like Figure 1-Figure 2 As shown in the figure, the gear rack clearance detection tooling for laser cutting machines is designed to improve detection accuracy and enhance ease of use. The various structures cooperate with each other to achieve precise simulation and efficient detection. The gear rack clearance detection tooling for laser cutting machines is hereinafter referred to as "the tooling".

[0040] The laser cutting machine gear rack clearance detection tooling includes a flange 3 and a fixed shaft 1. One end of the fixed shaft 1 is coaxially fixed to the other end of the flange 3. The edge of the flange 3 is provided with multiple bolt holes 4 distributed circumferentially around its axis. The distribution of the bolt holes 4 matches the connection holes preset at the input end of the reducer 8 for the servo motor 7. The fixed shaft 1 is used to connect to the coupling 11 at the input end of the reducer 8. By using the flange 3 and the fixed shaft 1 to simulate the output end structure of the servo motor 7, the connection method between the tooling and the reducer 8 is consistent with the actual installation method of the servo motor 7. This truly simulates the meshing state of the gear 9 and rack 14 under actual working conditions and improves the accuracy of meshing clearance measurement.

[0041] It effectively avoids measurement errors caused by different connection methods, ensures that the measurement data can accurately reflect the actual meshing clearance, provides a reliable basis for the subsequent installation and adjustment of the gear 9 and rack 14, and ensures the assembly accuracy of the laser cutting machine transmission system.

[0042] In actual work, one end of the fixed shaft 1 is coaxially fixed to one end of the docking flange 3. The bolt hole 4 on the edge of the flange 3 matches the connection hole position of the servo motor 7 preset at the input end of the reducer 8. It can be fastened by fasteners such as screws 19. During installation, the fixed shaft 1 is docked with the coupling 11 at the input end of the reducer 8 so that the tooling is firmly installed on the reducer 8 to simulate the working state of the servo motor 7.

[0043] like Figure 1 As shown, a positioning protrusion 2 is set between the flange 3 and the fixed shaft 1, which serves as a stop to cooperate with the positioning groove on the reducer 8, further accurately positioning the installation position of the tooling and the reducer 8, enhancing the stability of the tooling during the detection process, reducing the tooling installation deviation, and fixing the relative position of the tooling and the reducer 8 during the detection process, thereby ensuring the reliability of the measurement data and improving the detection accuracy.

[0044] like Figure 2 As shown, a through slot 5 is provided on the end of flange 3 away from fixed shaft 1 to prevent a "vacuum effect" (the tooling is machined with high precision, with a flatness of ≤0.02mm) that would hinder handling. This also reduces the overall weight of the tooling, facilitating movement and operation, while saving material costs without compromising tooling performance.

[0045] The through slot 5 serves as a weight-reducing structure. By rationally designing its shape and position, the tooling material consumption is reduced while ensuring that the tooling can maintain stable structural strength when bearing the forces during the testing process, without affecting the normal progress of the testing work.

[0046] The tooling is made entirely of 45# steel. The main manufacturing process is: rough turning - heat treatment - (fine turning) and fine grinding (tempering treatment followed by surface quenching). After heat treatment, the surface hardness is ≥45HRC. The higher surface hardness prevents surface damage caused by bumps, collisions, and extrusion during use, preventing the surface accuracy from being affected. The fixture consists of a cylindrical fixed shaft 1 and flange 3. While its weight and size vary depending on the reducer 8 model used in each laser cutting machine, the structural principle remains the same. For a Yaskawa 1.8kW motor, for example, the fixture weighs approximately 3.2kg and is lightweight enough to be easily moved and operated with one hand. (The following examples use the fixture for this motor.)

[0047] The dimensions and tolerances of the flange 3 , the positioning protrusion 2 and the fixed shaft 1 on the fixture are configured according to the servo motor 7 to be replaced, so as to maintain a stable fit between the fixture and the reducer 8 .

[0048] Example 2 In another typical embodiment of the present invention, Figures 1-13 As shown in the figure, a method for detecting the clearance of gear rack of laser cutting machine is given.

[0049] A complete laser cutting machine has reducers 8, servo motors 7, gears 9, etc. installed on both sides of the crossbeam 6. The crossbeam 6 is installed on the bed 16 and connected to the guide rail 13 slider installed on the bed 16. The guide rail 13 is fixed to the bed 16 through the guide rail pressing block 15. A machine head is installed above the crossbeam 6, and a servo motor 7, gears 9, reducers 8, etc. are installed above the machine head. The machine tool will have a protective cover, which is not shown in the accompanying drawings corresponding to this embodiment.

[0050] like Figure 3-Figure 13 As shown, the guide rails 13 are distributed on the bed 16, the crossbeam 6 is mounted on the guide rails 13, the crossbeam 6 is provided with a crossbeam mounting surface 17, the reducer 8 is provided with a reducer mounting plate 10, and the reducer mounting plate 10 is mounted on the crossbeam mounting surface 17 by fasteners. By loosening the fasteners, the relative position of the reducer mounting plate 10 and the crossbeam mounting surface 17 can be adjusted, thereby changing the relative position of the crossbeam 6 and the gear 9 at the output end of the reducer 8. A tightening block 18 is also provided on the crossbeam mounting surface 17, and the tightening bolts on the tightening block 18 can assist in adjusting the position of the reducer mounting plate 10.

[0051] A groove is formed at one end of the reducer 8 that is connected to the servo motor 7. The coupling 11 at the input end of the reducer 8 is located in this groove. Connection holes are opened circumferentially on the outside of the groove opening. An operating hole for tightening the coupling 11 is opened on the side wall of the groove. The operating hole is equipped with a dust cap 12.

[0052] The method for detecting the gear rack clearance of a laser cutting machine utilizes the gear rack clearance detection tooling of the laser cutting machine in Example 1, and specifically includes the following steps: The reducer 8 is arranged on the crossbeam 6 through the reducer mounting plate 10. The reducer mounting plate 10 is moved to the position where the parallelism difference between the guide rail 13 and the rack 14 is the largest, and the tooth at the position where the radial runout of the gear 9 at the output end of the reducer 8 is the largest is meshed with the rack 14; Install flange 3 on reducer 8, fix shaft 1 to coupling 11, assemble screws 19 after matching bolt holes 4 on flange 3 with connection holes, and then tighten coupling 11 to lock the position of gear 9; Push the beam 6 where the reducer 8 is located back and forth, and measure the movement of the beam 6 along the guide rail 13; Compare the activity amount and the backlash setting value to determine whether it meets the setting requirements.

[0053] In addition, the adjustment process after the adjustment judgment includes: If the amount of movement is greater than the set value of the reverse clearance, it is determined that the setting requirement is not met, the relative position of the reducer mounting plate 10 and the crossbeam 6 is adjusted, and the amount of movement of the crossbeam 6 along the guide rail 13 is locked and measured again.

[0054] Adjusting the relative position of the reducer mounting plate 10 and the crossbeam 6 includes adjusting the position of the reducer mounting plate 10 relative to the crossbeam 6 along the guide rail 13 and / or along a direction perpendicular to the guide rail 13 .

[0055] If the amount of movement is less than or equal to the reverse clearance setting value, it is judged to meet the setting requirements. Maintain the relative position of the reducer mounting plate 10 and the beam 6, remove the flange 3 and the fixed shaft 1, allow the gear 9 to rotate freely, and perform the meshing tightness test.

[0056] For crane operators, the engagement tightness test includes: Take the detection wire 21 and insert it into the high point of the gear 9 and the rack 14, push the crossbeam 6 to move the gear 9 along the rack 14, and press out multiple sheet-like parts on the detection wire 21; Measure the thickness of the sheet part and compare it with the set thickness value to determine whether it meets the requirements; If not, adjust the relative position of the reducer mounting plate 10 and the crossbeam 6 until it meets the requirements; If it meets the requirements, the test is completed.

[0057] The measuring tool 20 adopts a dial indicator, the base of which is fixed on the bed 16 or the guide rail 13. After the needle is pressed into the set length, it hits the beam 6 or a component that moves synchronously with the beam 6 to measure the movement of the beam 6 along the guide rail 13.

[0058] In this embodiment, combined with Figures 1-13 , the gear rack clearance detection method of the laser cutting machine is explained in detail.

[0059] The detection method includes preparation, backlash detection and adjustment, and meshing tightness detection, ensuring the assembly accuracy of gear 9 and rack 14 and guaranteeing the efficient and stable operation of the laser cutting machine.

[0060] First, the reducer 8 is arranged on the crossbeam 6 through the reducer mounting plate 10, and is moved to the point where the difference in parallelism between the guide rail 13 and the rack 14 is the largest. At the same time, the tooth at the point where the radial runout of the gear 9 at the output end of the reducer 8 is the largest is meshed with the rack 14. The purpose is to simulate the most unfavorable working condition that may occur in the gear 9 and rack 14 when the laser cutting machine is running. Testing under such working conditions can more comprehensively and accurately discover potential meshing problems and ensure the reliability of the test results.

[0061] Before assembly, the components should be kept clean and free of debris and dirt to prevent the measurement results from being affected. Other preparations have been made before using the tooling, such as the reducer 8 has been installed on the reducer mounting plate 10, and the gear 9 has been installed on the reducer 8. Other preparations will not be repeated here. Use the steel stamp "A" mark to mark the place where the difference in parallelism between the guide rail 13 and the rack 14 is the largest within the entire stroke. It can be understood as the highest point of the rack 14. Install the tooling from the A mark, such as Figure 7 As shown. Gear 9 will also have errors in its radial runout. It is also necessary to find the point where the radial runout of gear 9 is the largest and match it with the meshing position, as shown in Figure 8 shown.

[0062] First, install the reducer 8 on the reducer mounting plate 10. After the reducer 8 falls to the corresponding position on the beam mounting surface 17, lightly tighten the fasteners (1 / 4 of the standard torque). Then, use the jacking bolts to push the reducer mounting plate 10 to engage the gear 9 with the rack 14. Then tighten the fasteners (1 / 3 of the standard torque). Then, move the mounting plate to the position where the difference in parallelism between the guide rail 13 and the rack 14 is the largest. Find the tooth on the gear 9 with the largest radial runout and mesh it with the rack 14.

[0063] Installing flange 3 on reducer 8, securing shaft 1 to coupling 11, matching bolt holes 4 and installing screws 19, and then tightening coupling 11 to lock gear 9 in position, ensures a secure connection between the fixture and reducer 8, simulates the state of servo motor 7 after installation, and ensures that the fixture and reducer 8 form a single unit during testing, accurately transmitting displacement and ensuring that the test data truly reflects the backlash of gear 9 and rack 14. This ensures the fixture is stable and reliable during testing, improves the accuracy of backlash measurement, and provides data support for subsequent judgment and adjustment.

[0064] Push the beam 6 where the reducer 8 is located back and forth, use a dial indicator to measure the movement of the beam 6 along the guide rail 13, and determine the size of the reverse clearance of the gear 9 and rack 14 by measuring the movement of the beam 6, so as to provide a quantitative basis for judging whether the assembly of the gear 9 and rack 14 meets the requirements.

[0065] Fix the dial indicator base on the bed 16 or the guide rail 13, press the indicator needle into the set length and hit it on the beam 6 or the component that moves synchronously with the beam 6, then push the beam 6 back and forth and record the change in the dial indicator value. Specifically, press the indicator needle into 1-2mm and hit it on the rear end of the beam 6 or the side of the reducer mounting plate 10, according to Figure 11 Push the crossbar 62-3 times in the direction of the arrow shown, and then record the dial indicator value (you can also reset the needle to zero at this time). Figure 12 Push beam 6 in the right direction and observe the pointer change (release the pointer after pushing beam 6 manually. Repeat 2-3 times for accurate values). The difference in the dial indicator value is the backlash. It can accurately measure the displacement of beam 6 and quantify the backlash of gear 9 and rack 14, making the test results more intuitive and accurate, and facilitating subsequent judgment and adjustment.

[0066] Compare the amount of activity and the reverse clearance setting value to determine whether it meets the setting requirements. The reverse clearance setting value is ≤0.02mm. If it does not meet the requirements, adjust the relative position of the reducer mounting plate 10 and the beam 6 and measure again to ensure that the reverse clearance of the gear 9 rack 14 is within a reasonable range and to ensure the transmission accuracy of the laser cutting machine.

[0067] Compare the measured movement of the crossbeam 6 with the preset reverse clearance value. If the movement is greater than the set value, adjust the position of the reducer mounting plate 10 relative to the crossbeam 6 along the guide rail 13 or along the direction perpendicular to the guide rail 13, or adjust the position along the guide rail 13 and along the direction perpendicular to the guide rail 13 at the same time. After the adjustment is completed, lock and measure the movement of the crossbeam 6 again.

[0068] If the reverse clearance meets the set requirements, that is, the reverse clearance is ≤0.02mm, maintain the relative position of the reducer mounting plate 10 and the beam 6, remove the flange 3 and the fixed shaft 1, allow the gear 9 to rotate freely, and perform the meshing tightness test. The purpose is to further detect the meshing state of the gear 9 and the rack 14, check whether the meshing is too tight, and ensure that its meshing tightness also meets the requirements to avoid affecting the equipment operation due to over-tight or over-loose meshing.

[0069] Specifically, after the backlash test is qualified, the flange 3 and the fixed shaft 1 of the tooling are removed to allow the gear 9 to rotate freely; Insert the test wire 21 into the position where the high point of the gear 9 and rack 14 is aligned. Push the crossbeam 6 to move the gear 9 along the rack 14. At this time, the test wire 21 will be compressed into a sheet. Use a tool to measure the thickness of the sheet and then compare it with the set thickness value. This is used to accurately determine the meshing tightness of the gear 9 and rack 14, providing an accurate basis for subsequent adjustments to ensure that the gear 9 and rack 14 can function normally during equipment operation.

[0070] If the thickness of the sheet portion does not meet the set thickness value, adjust the relative position of the reducer mounting plate 10 and the crossbeam 6 until it meets the requirements. The purpose is to achieve the best meshing tightness of the gear 9 and rack 14 by adjustment to ensure the normal operation and service life of the equipment.

[0071] When the thickness of the sheet exceeds the set value, the meshing clearance of the gear 9 and rack 14 is reduced; when the thickness of the sheet is less than the set value, the meshing clearance of the gear 9 and rack 14 is increased. After adjustment, retest until the thickness of the sheet meets the set requirements. This ensures that the meshing tightness of the gear 9 and rack 14 meets the design requirements, reduces wear during equipment operation, and improves the stability and reliability of the equipment.

[0072] In this embodiment, the detection wire 21 uses an electrical solder wire with a diameter of 0.5 mm. After obtaining the sheet part, the thickness setting value range of the sheet part is 0.05≦thickness≦0.07 mm; if the thickness of the sheet part is measured using an outside micrometer and the thickness is less than 0.05 mm, it is because the engagement is too tight, and the fasteners of the reducer 8 need to be removed and readjusted.

[0073] If it does not meet the ≤0.02mm standard, it is because the directional clearance is too large, and the fasteners need to be loosened and adjusted to bring the gear 9 closer to the rack 14. After the adjustment is completed, repeat the meshing tightness test until the requirements are met.

[0074] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tool for detecting the clearance between the gear and rack of a laser cutting machine, characterized in that: It includes a flange and a fixed shaft. One end of the fixed shaft is coaxially fixed to one end of the docking flange. The edge of the flange is provided with multiple bolt holes distributed circumferentially around its axis. The distribution positions of the bolt holes match the connection holes of the servo motor preset at the input end of the reducer. The fixed shaft is used to dock the coupling at the input end of the reducer.

2. The laser cutting machine rack and gear clearance detection tool as claimed in claim 1, characterized in that: A positioning protrusion is provided between the flange and the fixed shaft. The positioning protrusion is raised relative to one end of the flange. The positioning protrusion serves as a stop to cooperate with the positioning groove on the reducer.

3. The laser cutting machine rack and gear clearance detection tool as claimed in claim 1 or 2, characterized in that: A through slot is provided on one end of the flange away from the fixed shaft, and the through slot serves as a weight-reducing structure.

4. A method for detecting the clearance between gears and racks of a laser cutting machine, characterized in that: The laser cutting machine rack and gear clearance detection device according to any one of claims 1 to 3 comprises: The reducer is arranged on the crossbeam through the reducer mounting plate. The reducer mounting plate is moved to the point where the difference in parallelism between the guide rail and the rack is the largest, and the tooth at the output end of the reducer where the radial runout is the largest is meshed with the rack. Install the flange on the reducer, fix the shaft to the coupling, assemble the screws after matching the bolt holes on the flange with the connection holes, and then tighten the coupling to lock the gear position; Push the beam where the reducer is located back and forth, and measure the movement of the beam along the guide rail; Compare the activity amount and the backlash setting value to determine whether it meets the setting requirements.

5. The method for detecting the gear rack clearance of a laser cutting machine according to claim 4, wherein: If the amount of movement is greater than the set value of the reverse clearance, it is judged that it does not meet the setting requirements. Adjust the relative position of the reducer mounting plate and the beam, lock it, and measure the amount of movement of the beam along the guide rail again.

6. The method for detecting the gear rack clearance of a laser cutting machine according to claim 5, wherein: Said adjusting the relative position of the reducer mounting plate and the crossbeam includes: adjusting the position of the reducer mounting plate relative to the crossbeam along the guide rail direction and / or along the direction perpendicular to the guide rail direction.

7. The method for detecting the gear rack clearance of a laser cutting machine according to claim 4, wherein: If the amount of movement is less than or equal to the reverse clearance setting value, it is judged to meet the setting requirements. Maintain the relative position of the reducer mounting plate and the beam, remove the flange and fixed shaft, allow the gear to rotate freely, and perform meshing tightness detection.

8. The method for detecting the gear rack clearance of a laser cutting machine according to claim 7, wherein: The meshing tightness detection includes: Take the test wire and insert it into the high point of the gear rack, push the crossbeam to make the gear move along the rack, and press out multiple sheet parts on the test wire; Measure the thickness of the sheet part and compare it with the set thickness value to determine whether it meets the requirements; If not, adjust the relative position of the reducer mounting plate and the crossbeam until it meets the requirements; If it meets the requirements, the test is completed.

9. The method for detecting the gear rack clearance of a laser cutting machine according to claim 8, wherein: The adjusting the relative position of the reducer mounting plate and the crossbeam includes: when the thickness of the sheet portion exceeds the thickness setting value, reducing the gear rack meshing clearance; when the thickness of the sheet portion is less than the thickness setting value, increasing the gear rack meshing clearance.

10. The method for detecting the gear rack clearance of a laser cutting machine according to claim 4, wherein: The measuring tool adopts a dial indicator, the base of which is fixed on the bed or the guide rail. After the needle is pressed into the set length, it hits the beam or a component that moves synchronously with the beam to measure the movement of the beam along the guide rail.

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