Ultra-long large gate machining equipment and machining method

Abstract

The invention relates to the technical field of gate machining, in particular to ultra-long large gate machining equipment and method. The ultra-long large gate machining equipment comprises a supporting pier, a base plate, a detection device and a positioning supporting column; the positioning supporting columns are arranged at the head end and the tail end of the gate in the length direction correspondingly and used for being attached to the machined surface of the gate to serve as thickness datum reference faces; the detection device is arranged on the base plate and comprises a laser distance measuring sensor and a vertical driving assembly used for driving the laser distance measuring sensor to move in the vertical direction. The laser distance measuring sensor is used for measuring the distance between the laser distance measuring sensor and the to-be-machined face of the gate and controlling the cutting thickness of the milling assembly based on the difference value between the distance and the thickness datum reference face so as to ensure that the thickness size of the machined gate meets the preset requirement. By means of the machining equipment and the machining method, the problem that it cannot be ensured that the machined size and form and location tolerance meet the high-precision requirement can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of gate processing technology, and in particular to a processing equipment and method for ultra-long and large gates. Background Technology

[0002] For some extra-long and large gates, which are over 30 meters long and weigh hundreds of tons, the key functional surface—the sealing panel—has extremely high requirements for thickness accuracy, overall straightness, and surface flatness to ensure a tight fit with the gate section water-stop seat plate and achieve a reliable seal.

[0003] However, traditional processing equipment has significant limitations for such extra-long and large products. Conventional floor-type boring machines and gantry milling machines are limited by the size of the worktable and the range of travel, making it impossible to complete the processing of the water-sealing panel in one go. Only segmented processing methods can be used. During this process, the reference point needs to be re-aligned after each tool change or repositioning, which is cumbersome and accumulates errors. Steps or misalignments are easily formed at tool joints, requiring manual grinding for smoothing, which is not only inefficient but also makes it difficult to guarantee the overall dimensional and positional tolerances of the water-sealing panel. If the processing quality is unsatisfactory, rework costs are high and the cycle is long.

[0004] In the prior art, a Chinese utility model patent document with publication number CN210125882U and publication date of March 6, 2020 has also been proposed. The technical solution disclosed in this patent document is as follows: a rapid processing device for the water-stop surface of a steel gate includes a track, an operating platform that moves along the track is set on the track, a counterweight is fixed on one side of the operating platform, and a working platform is fixed on the other side; a transverse traveling mechanism, a longitudinal traveling mechanism and a vertical traveling mechanism of a power head are sequentially arranged on the working platform, and the vertical traveling mechanism is connected to the power head.

[0005] While the aforementioned technical solution utilizes mobile multi-degree-of-freedom machining, its design target is only the local water-stopping surface of the gate. During machining, the machining head acts vertically on the workpiece from top to bottom, and the laser rangefinder is only used for rough positioning of the machining starting surface, failing to establish a closed-loop thickness control mechanism. More importantly, if this device is directly applied to the continuous precision milling of the entire water-stopping panel, the lack of a global thickness reference and real-time feedback adjustment capability makes it impossible to ensure that the dimensions and geometric tolerances after machining meet high-precision requirements. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a processing equipment and method for ultra-long and large gates, which can effectively solve the problem of not being able to ensure that the dimensions and geometric tolerances of the processed gates meet high-precision requirements.

[0007] This invention is achieved by adopting the following technical solution: A processing device for ultra-long, large gates includes a support pier, a base, a seat plate, a drive component, and a milling processing device mounted on the seat plate. The base has a transverse slide rail, and the drive component drives the seat plate to move along the transverse slide rail. The milling processing device includes a milling assembly, a longitudinal traveling mechanism for driving the milling assembly longitudinally, and a vertical moving mechanism for adjusting the vertical position of the milling assembly. It also includes a detection device and two positioning supports. The two positioning supports are respectively located at the beginning and end of the gate's length direction and are used to fit against the already processed surface of the gate, serving as a thickness reference surface. The detection device, mounted on the seat plate, includes a laser rangefinder sensor and a vertical drive component for driving the laser rangefinder sensor to move vertically. The laser rangefinder sensor measures the distance between itself and the gate's surface to be processed, and based on the difference between this distance and the thickness reference surface, controls the cutting thickness of the milling assembly to ensure that the thickness of the processed gate meets preset requirements.

[0008] The base is also provided with a helical rack parallel to the transverse slide rail; the driving component includes a transverse travel servo motor mounted on the base plate, and the output shaft of the transverse travel servo motor is provided with a drive gear that matches the helical rack; the base plate is also provided with a slider that slides in cooperation with the transverse slide rail.

[0009] The milling assembly includes a milling cutter head, a spindle, and a spindle drive servo motor; the spindle drive servo motor is connected to the spindle via a synchronous belt transmission mechanism and is used to drive the spindle and the milling cutter head to rotate.

[0010] The longitudinal traveling mechanism includes a longitudinal base plate, a longitudinal slide rail, and a longitudinal traveling servo motor. The longitudinal slide rail and the longitudinal traveling servo motor are mounted on the longitudinal base plate. The milling component is mounted on the longitudinal slide rail and is connected to the longitudinal traveling servo motor through a transmission component to drive the milling component to move longitudinally.

[0011] The vertical moving mechanism includes a column and a vertical slide rail, a ball screw, and a vertical travel servo motor mounted on the column; the longitudinal travel mechanism slides with the vertical slide rail via a slider and is fixedly connected to the nut seat of the ball screw.

[0012] The vertical moving mechanism also includes a counterweight pulley assembly, which includes a counterweight block, a pulley, and a wire rope. One end of the wire rope is connected to the counterweight block, and the other end passes around the pulley and is connected to the longitudinal traveling mechanism.

[0013] The counterweight pulley assembly also includes a counterweight guide post, on which the counterweight is slidably disposed.

[0014] It also includes a lubrication pump.

[0015] A method for processing ultra-long, large gates, based on the aforementioned processing equipment, includes the following steps: Step S1. Hoist the gate to be processed onto the support pier, so that the processed surface on the back of the gate is in close contact with the thickness reference surface of the positioning column; Step S2. Adjust the position of the laser rangefinder sensor and measure the distance A1 from it to the thickness reference surface at both ends. If the distances measured at both ends are different, adjust the position of the gate to be processed on the support pier until the distances measured at both ends are the same. Step S3. Adjust the position of the laser rangefinder sensor so that the laser spot of the laser rangefinder sensor is aligned with the surface to be processed, and scan along the length of the gate to obtain the distance data A2 from the laser rangefinder sensor to the surface to be processed; Step S4. Determine the maximum value A2max and the minimum value A2min in the distance data from the laser rangefinder to the surface to be processed; Step S5. Based on the distance A1 and the measured maximum value A2max and minimum value A2min, calculate the maximum thickness A3max and minimum thickness A3min of the gate in its current unprocessed state: A3max = A1 - A2min; A3min = A1 - A2max; Step S6. Determine whether the minimum thickness A3min is less than the design target thickness A. If so, perform overlay welding on the corresponding area. After the overlay welding is completed, return to step S3 until the minimum thickness A3min is greater than the design target thickness A. Step S7. Based on the target thickness A, determine the maximum machining allowance Δh to be removed: Δh = A3max - A; Step S8. Based on the maximum machining allowance, determine the farthest moving distance of the milling cutter head in the longitudinal direction, and dynamically adjust the position of the milling cutter head in the transverse and vertical directions to achieve continuous milling of the gate surface to be machined.

[0016] Between steps S2 and S3, the following step is also included: checking whether the distance between the thickness reference surface at both ends of the gate and the laser range sensor is the same.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention sets positioning pillars at both ends of the gate's length as a global thickness reference surface. Combined with the laser rangefinder and vertical drive assembly integrated on the base plate, it can obtain the height difference between the surface to be processed and the reference surface, determine the cutting depth of the milling assembly, and determine the farthest moving distance of the milling assembly in the longitudinal direction. Thus, it can achieve high-precision, full-stroke adaptive processing of the sealing panel of ultra-long and large gates in one continuous cutting process. This effectively solves the problems of tool connection error, straightness deviation and high rework rate caused by traditional segmented processing, significantly improves processing efficiency, dimensional consistency and geometric accuracy, and ensures that the gate's water-stopping surface meets the stringent sealing performance requirements. It is especially suitable for the manufacturing of large hydraulic gates with a length exceeding 35 meters and a weight of hundreds of tons.

[0018] 2. In this invention, the transverse slide rail provides high-precision guidance, the helical rack provides high torque and stable linear drive, and combined with the support of the base, the three work together to enable the components on the base plate to achieve stable and precise transverse movement under ultra-long stroke, providing a motion basis for the continuous milling of the water sealing panel.

[0019] 3. In this invention, the spindle drive servo motor is connected to the spindle through a synchronous belt transmission mechanism, which not only achieves high-precision synchronous rotation control, but also effectively isolates the transmission of motor vibration to the spindle, thereby improving milling stability and surface finish.

[0020] 4. The counterweight pulley assembly can balance the weight of the longitudinal traveling mechanism and its supporting components, improve the stability and positioning accuracy of the lifting motion, and effectively prevent the risk of accidental slippage.

[0021] 5. The counterweight guide post can guide and limit the lifting and lowering movement of the counterweight.

[0022] 6. The lubrication pump is designed to supply oil to the guide rails and ball screws, ensuring low friction and high rigidity during long-term operation.

[0023] 7. The re-inspection process ensures more rigorous benchmark control, more reliable data collection, and ultimately higher accuracy. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, wherein: Figure 1 This is a schematic diagram of the processing of the present invention; Figure 2 This is a schematic diagram of the overall structure of the processing equipment of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the overall structure of the processing equipment of the present invention. Figure 2 ; Figure 4This is a schematic diagram of the base structure in this invention; Marked in the image: 1. Support pier, 2. Base, 3. Seat plate, 4. Horizontal slide rail, 5. Positioning support column, 6. Laser rangefinder sensor, 7. Surface to be machined, 8. Helical rack, 9. Horizontal travel servo motor, 10. Milling cutter head, 11. Spindle, 12. Spindle drive servo motor, 13. Synchronous belt, 14. Longitudinal seat plate, 15. Longitudinal slide rail, 16. Longitudinal travel servo motor, 17. Column, 18. Vertical slide rail, 19. Ball screw, 20. Vertical travel servo motor, 21. Counterweight, 22. Pulley, 24. Counterweight guide column, 25. Lubrication pump, 26. Gate, 27. Vertical drive assembly. Detailed Implementation

[0025] Example 1 As a basic embodiment of the present invention, the present invention includes an ultra-long large gate processing equipment, comprising a support pier 1, a base 2, a seat plate 3, a driving component, and a milling processing device disposed on the seat plate 3. The base 2 is provided with a transverse slide rail 4, and the driving component is used to drive the seat plate 3 to move along the transverse slide rail 4. The milling processing device includes a milling assembly, a longitudinal traveling mechanism for driving the milling assembly to move longitudinally, and a vertical moving mechanism for adjusting the vertical position of the milling assembly. The support pier 1, base 2, seat plate 3, driving component, longitudinal traveling mechanism, and vertical moving mechanism can all employ conventional techniques in the art, as long as they can drive the milling assembly to move in the transverse, longitudinal, and vertical directions; this embodiment will not elaborate further.

[0026] The processing equipment also includes a detection device and two positioning supports 5. The two positioning supports 5 are respectively located at the beginning and end of the gate 26 along its length, and are used to fit against the processed surface of the gate 26, serving as a thickness reference surface. The detection device is mounted on the base plate 3 and includes a laser rangefinder 6 and a vertical drive assembly 27 for moving the laser rangefinder 6 vertically. The vertical drive assembly 27 facilitates better detection of the distance between the laser rangefinder 6 and the thickness reference surface. The laser rangefinder 6 is used to measure its distance from the surface 7 of the gate 26 to be processed, and based on the difference between this distance and the thickness reference surface, controls the cutting thickness of the milling assembly to ensure that the thickness of the processed gate 26 meets the preset requirements.

[0027] Example 2 In a preferred embodiment of the present invention, the present invention includes a processing device for an ultra-long large gate, comprising a support pier 1, a base 2, a seat plate 3, a driving component, and a milling processing device disposed on the seat plate 3. The base 2 is provided with a transverse slide rail 4 and a helical rack 8 arranged parallel to the transverse slide rail 4. The seat plate 3 is provided with a slider that interacts with the transverse slide rail 4. The driving component includes a transverse travel servo motor 9 mounted on the seat plate 3, and the output shaft of the transverse travel servo motor 9 is provided with a driving gear that matches the helical rack 8, for driving the seat plate 3 to move along the transverse slide rail 4.

[0028] The milling apparatus includes a milling assembly, a longitudinal traveling mechanism for driving the milling assembly to move longitudinally, and a vertical moving mechanism for adjusting the vertical position of the milling assembly. The milling assembly includes a milling cutter head 10, a spindle 11, and a spindle drive servo motor 12. The spindle drive servo motor 12 is connected to the spindle 11 via a synchronous belt transmission mechanism and is used to drive the spindle 11 and the milling cutter head 10 to rotate.

[0029] The longitudinal traveling mechanism and the vertical moving mechanism can employ conventional techniques in the art. For example, both the vertical moving mechanism and the longitudinal traveling mechanism can be one of a linear motor drive system, a hydraulic or pneumatic drive system, a chain drive, or a belt drive mechanism. The vertical moving mechanism is used to drive the milling assembly to reciprocate in the vertical direction, and the longitudinal traveling mechanism is used to drive the vertical moving machine and the milling assembly located on the vertical moving machine to reciprocate in the longitudinal direction.

[0030] The processing equipment also includes a detection device and two positioning supports 5. The two positioning supports 5 are respectively located at the beginning and end of the gate 26 along its length, and are used to fit against the processed surface of the gate 26, serving as a thickness reference surface. The detection device is mounted on the base plate 3 and includes a laser rangefinder 6 and a vertical drive assembly 27 for moving the laser rangefinder 6 vertically. The vertical drive assembly facilitates better detection of the distance between the laser rangefinder 6 and the thickness reference surface. The laser rangefinder 6 measures its distance from the surface 7 of the gate 26 to be processed, and based on the difference between this distance and the thickness reference surface, controls the cutting thickness of the milling assembly to ensure that the thickness of the processed gate 26 meets the preset requirements.

[0031] Example 3 In another preferred embodiment of the present invention, the present invention includes a processing equipment for an ultra-long large gate, comprising a support pier 1, a base 2, a seat plate 3, a driving component, and a milling processing device disposed on the seat plate 3. The base 2 is provided with a transverse slide rail 4, and the driving component is used to drive the seat plate 3 to move along the transverse slide rail 4. The milling processing device includes a milling assembly, a longitudinal traveling mechanism for driving the milling assembly to move longitudinally, and a vertical moving mechanism for adjusting the vertical position of the milling assembly.

[0032] The processing equipment also includes a detection device and two positioning supports 5. The two positioning supports 5 are respectively located at the beginning and end of the gate 26 along its length, and are used to fit against the processed surface of the gate 26, serving as a thickness reference surface. The detection device is mounted on the base plate 3 and includes a laser rangefinder 6 and a vertical drive assembly 27 for moving the laser rangefinder 6 vertically. The vertical drive assembly 27 facilitates better detection of the distance between the laser rangefinder 6 and the thickness reference surface. Specifically, the vertical drive assembly 27 may include a servo drive motor, a ball screw pair, a vertical guide rail, and a sliding mounting base. The servo drive motor can be fixed on the base plate 3, and its output shaft is connected to the vertically arranged ball screw via a coupling; the sliding mounting base is fixedly connected to the laser rangefinder 6 and the nut of the ball screw, and is slidably mounted on the vertical guide rail. When the servo drive motor is running, it drives the ball screw to rotate, which in turn drives the sliding mounting base to rise and fall smoothly along the vertical guide rail, so as to achieve precise position adjustment of the laser range sensor 6 in the vertical direction.

[0033] The laser rangefinder 6 is used to measure the distance between itself and the surface 7 to be processed on the gate 26, and based on the difference between the distance and the thickness reference surface, controls the cutting thickness of the milling assembly to ensure that the thickness of the gate 26 after processing meets the preset requirements.

[0034] Example 4 In another preferred embodiment of the present invention, the present invention includes a processing equipment for ultra-long and large gates, comprising a support pier 1, a base 2, a seat plate 3, a driving component, and a milling processing device. The base 2 is made of welded rectangular tubing, heat-treated to relieve stress, and then machined using a gantry milling machine, which ensures its precision. (See attached specification.) Figure 4 The base 2 is equipped with two transverse slide rails 4 and a helical rack 8 parallel to the transverse slide rails 4. The seat plate 3 is equipped with a slider that slides in cooperation with the transverse slide rails 4. The driving component includes a transverse travel servo motor 9 mounted on the seat plate 3, and the output shaft of the transverse travel servo motor 9 is equipped with a drive gear that matches the helical rack 8. When the transverse travel servo motor 9 operates, it drives the drive gear to rotate. Through the meshing transmission between the drive gear and the helical rack 8, the seat plate 3 is pushed to move precisely along the transverse slide rails 4, realizing feed in the X-axis direction.

[0035] Refer to the instruction manual appendix Figure 2 The milling device is mounted on the base plate 3 and includes a milling assembly, a longitudinal travel mechanism, and a vertical movement mechanism. The milling assembly includes a milling cutter head 10, a spindle 11, and a spindle drive servo motor 12. The spindle drive servo motor 12 is connected to the spindle 11 via a synchronous belt drive mechanism to drive the spindle 11 and the milling cutter head 10 to rotate. Specifically, the synchronous belt drive mechanism may include a driving pulley, a driven pulley, and a synchronous belt 13 surrounding it. The driving pulley is mounted on the output shaft of the spindle drive servo motor 12, and the driven pulley is mounted on the spindle 11. The spindle 11 is supported on the frame on the base plate 3 by bearing seats.

[0036] The longitudinal travel mechanism includes a longitudinal base plate 14, longitudinal slide rails 15, and a longitudinal travel servo motor 16. There are two longitudinal slide rails 15. The longitudinal slide rails 15 and the longitudinal travel servo motor 16 are mounted on the longitudinal base plate 14. The milling assembly is slidably mounted on the longitudinal slide rails 15 and connected to the longitudinal travel servo motor 16 via a transmission assembly, used to drive the milling assembly to move along the longitudinal slide rails 15, achieving feed in the Y-axis direction. The transmission assembly is a conventional technology in the art, and may include, for example, a drive pulley, a driven pulley, a synchronous belt, and a tensioning device.

[0037] The vertical moving mechanism includes a column 17, a vertical slide rail 18, a ball screw 19, and a vertical travel servo motor 20. The column 17 is fixed on the base plate 3, and the vertical slide rail 18, ball screw 19, and vertical travel servo motor 20 are respectively mounted on the column 17. The longitudinal base plate 14 of the longitudinal traveling mechanism slides along the vertical slide rail 18 via a slider and is fixedly connected to the nut seat of the ball screw 19, thereby moving along the vertical slide rail 18 under the drive of the vertical travel servo motor 20 to achieve feed in the Z-axis direction.

[0038] Furthermore, to balance the weight of the longitudinal traveling mechanism and the components it supports, the vertical moving mechanism also includes a counterweight pulley assembly. (See attached specification.) Figure 3 The counterweight pulley assembly includes a counterweight block 21, two pulleys 22, two steel wire ropes, and two counterweight guide posts 24. The counterweight block 21 is slidably mounted on the counterweight guide posts 24. One end of the steel wire rope is connected to the counterweight block 21, and the other end passes around the pulleys 22 and is connected to the longitudinal seat plate 14 of the longitudinal traveling mechanism.

[0039] To ensure low friction and high rigidity of the processing equipment during long-term operation, a lubrication pump 25 is also provided to supply oil to each guide rail and ball screw 19.

[0040] Furthermore, the milling device is also provided with a dust cover housing, and the milling cutter 10 extends outward from the dust cover housing.

[0041] Refer to the instruction manual appendix Figure 1 The processing equipment also includes a detection device and two positioning supports 5. The two positioning supports 5 are respectively located at the beginning and end of the gate 26 along its length, and are used to fit against the processed surface of the gate 26, serving as a thickness reference surface. The detection device can be mounted on the base plate 3, specifically on one side of the dust cover housing, and includes a laser rangefinder 6 and a vertical drive assembly 27 for moving the laser rangefinder 6 vertically. The vertical drive assembly facilitates better detection of the distance between the laser rangefinder 6 and the thickness reference surface.

[0042] The processing equipment also includes an electrical control system, which is a conventional technology in the field, including a PLC, control panel, driver, sensor, power distribution cabinet, and various electrical components. The laser rangefinder 6 is used to measure its distance from the surface 7 of the gate 26 to be processed, and based on the difference between this distance and the thickness reference surface, controls the cutting thickness of the milling assembly to ensure that the thickness of the gate 26 after processing meets the preset requirements.

[0043] Example 5 In another preferred embodiment of the present invention, the present invention includes a method for processing ultra-long large gates, which is implemented based on the processing equipment described in any of the embodiments 1 to 4 above. The processing method includes the following steps: Step S1. Hoist the gate 26 to be processed onto the support pier 1, so that the processed surface on the back of the gate 26 is in close contact with the thickness reference surface of the positioning column 17, to ensure the initial positioning of the gate 26.

[0044] Step S2. Adjust the position of the laser rangefinder 6 and measure the distance A1 from it to the thickness reference surface at the beginning and end of the machine respectively. If the distances measured at the two ends are different, adjust the position of the gate 26 to be processed on the support pier 1 until the distances measured at the two ends are the same.

[0045] Check whether the distance between the thickness reference surface at both ends of the gate 26 and the laser rangefinder 6 is the same.

[0046] Step S3. Adjust the position of the laser rangefinder 6 so that the laser spot of the laser rangefinder 6 is aligned with the surface to be processed 7, and scan along the length direction of the gate 26 to obtain the distance data A2 between the laser rangefinder 6 and the surface to be processed 7.

[0047] Step S4. Determine the maximum value A2max and the minimum value A2min in the distance data from the laser rangefinder 6 to the surface to be processed 7.

[0048] Step S5. Based on the distance A1 and the measured maximum value A2max and minimum value A2min, calculate the maximum thickness A3max and minimum thickness A3min of the gate 26 in its current unprocessed state: A3max = A1 - A2min; A3min = A1 - A2max.

[0049] Step S6. Determine whether the minimum thickness A3min is less than the design target thickness A. If so, perform overlay welding on the corresponding area. After the overlay welding is completed, return to step S3 until the minimum thickness A3min is greater than the design target thickness A.

[0050] Step S7. Based on the target thickness A, determine the maximum machining allowance Δh to be removed: Δh = A3max - A.

[0051] Step S8. Based on the maximum machining allowance, and combined with the distance between the initial position of the milling cutter 10 and the maximum thickness area of ​​the gate 26 in its unprocessed state, determine the farthest moving distance of the milling cutter 10 in the longitudinal direction (i.e., the Y-axis direction), and dynamically adjust the position of the milling cutter 10 in the transverse direction (i.e., the X-axis direction) and the vertical direction (i.e., the Z-axis direction) to achieve continuous milling of the surface 7 of the gate 26 to be machined.

[0052] The above processing method can solve the problem that the 26 sealing panels of ultra-long and large gates cannot be processed in one go, and that the dimensions and geometric tolerances after processing cannot meet the high precision requirements.

[0053] In summary, any other corresponding modifications made by those skilled in the art after reading this invention document, without requiring creative mental effort, based on the technical solutions and concepts of this invention, are all within the scope of protection of this invention.

Claims

1. A processing equipment for an ultra-long large gate, comprising a support pier (1), a base (2), a seat plate (3), a driving component, and a milling processing device disposed on the seat plate (3); the base (2) is provided with a transverse slide rail (4), and the driving component is used to drive the seat plate (3) to move along the transverse slide rail (4); the milling processing device comprises a milling assembly, a longitudinal traveling mechanism for driving the milling assembly to move longitudinally, and a vertical moving mechanism for adjusting the vertical position of the milling assembly; characterized in that: It also includes a detection device and two positioning supports (5); the two positioning supports (5) are respectively set at the beginning and end of the gate (26) in the length direction, and are used to fit with the machined surface of the gate (26) as a thickness reference surface; the detection device is set on the base plate (3) and includes a laser range sensor (6) and a vertical drive assembly (27) for driving the laser range sensor (6) to move in the vertical direction; the laser range sensor (6) is used to measure its distance from the surface (7) to be machined on the gate (26), and based on the difference between the distance and the thickness reference surface, the cutting thickness of the milling assembly is controlled to ensure that the thickness dimension of the gate (26) after processing meets the preset requirements.

2. The ultra-long large gate processing equipment according to claim 1, characterized in that: The base (2) is also provided with a helical rack (8) parallel to the transverse slide rail (4); the driving component includes a transverse walking servo motor (9) mounted on the seat plate (3), and the output shaft of the transverse walking servo motor (9) is provided with a driving gear that matches the helical rack (8); the seat plate (3) is also provided with a slider that slides in cooperation with the transverse slide rail (4).

3. The ultra-long large gate processing equipment according to claim 1, characterized in that: The milling assembly includes a milling cutter head (10), a spindle (11), and a spindle drive servo motor (12); the spindle drive servo motor (12) is connected to the spindle (11) through a synchronous belt transmission mechanism and is used to drive the spindle (11) and the milling cutter head (10) to rotate.

4. The ultra-long large gate processing equipment according to claim 1, characterized in that: The longitudinal traveling mechanism includes a longitudinal base plate (14), a longitudinal slide rail (15), and a longitudinal traveling servo motor (16). The longitudinal slide rail (15) and the longitudinal traveling servo motor (16) are mounted on the longitudinal base plate (14). The milling component is mounted on the longitudinal slide rail (15) and connected to the longitudinal traveling servo motor (16) through a transmission component to drive the milling component to move longitudinally.

5. The ultra-long large gate processing equipment according to claim 4, characterized in that: The vertical moving mechanism includes a column (17) and a vertical slide rail (18), a ball screw (19) and a vertical walking servo motor (20) disposed on the column (17); the longitudinal walking mechanism slides with the vertical slide rail (18) through a slider and is fixedly connected to the nut seat of the ball screw (19).

6. The ultra-long large gate processing equipment according to claim 5, characterized in that: The vertical moving mechanism also includes a counterweight pulley assembly, which includes a counterweight block (21), a pulley (22) and a wire rope. One end of the wire rope is connected to the counterweight block (21), and the other end passes around the pulley (22) and is connected to the longitudinal moving mechanism.

7. The ultra-long large gate processing equipment according to claim 6, characterized in that: The counterweight pulley assembly also includes a counterweight guide post (24), and the counterweight (21) is slidably disposed on the counterweight guide post (24).

8. The ultra-long large gate processing equipment according to claim 1, characterized in that: It also includes a lubrication pump (25).

9. A method for processing ultra-long, large gates, characterized in that: It is achieved based on the processing equipment described in any one of claims 1 to 8, and includes the following steps: Step S1. Hoist the gate (26) to be processed onto the support pier (1) so that the processed surface on the back of the gate (26) is in close contact with the thickness reference surface of the positioning column (17); Step S2. Adjust the position of the laser rangefinder (6) and measure the distance A1 from it to the thickness reference surface at both ends. If the distances measured at both ends are different, adjust the position of the gate (26) to be processed on the support pier (1) until the distances measured at both ends are the same. Step S3. Adjust the position of the laser rangefinder (6) so that the laser spot of the laser rangefinder (6) is aligned with the surface to be processed (7), and scan along the length direction of the gate (26) to obtain the distance data A2 from the laser rangefinder (6) to the surface to be processed (7); Step S4. Determine the maximum value A2max and the minimum value A2min in the distance data from the laser rangefinder (6) to the surface to be processed (7); Step S5. Based on the distance A1 and the measured maximum value A2max and minimum value A2min, calculate the maximum thickness A3max and minimum thickness A3min of the gate (26) in its current unprocessed state: A3max = A1 - A2min; A3min = A1 - A2max; Step S6. Determine whether the minimum thickness A3min is less than the design target thickness A. If so, perform overlay welding on the corresponding area. After the overlay welding is completed, return to step S3 until the minimum thickness A3min is greater than the design target thickness A. Step S7. Based on the target thickness A, determine the maximum machining allowance Δh to be removed: Δh = A3max - A; Step S8. Based on the maximum machining allowance, determine the farthest moving distance of the milling cutter head (10) in the longitudinal direction, and dynamically adjust the position of the milling cutter head (10) in the horizontal and vertical directions to realize continuous milling of the gate (26) surface (7) to be machined.

10. A method for processing an ultra-long, large gate according to claim 9, characterized in that: Between steps S2 and S3, the following is also included: checking whether the distance between the thickness reference surface at both ends of the gate (26) and the laser range sensor (6) is the same.

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