Long profile double-end compensation processing equipment based on inner and outer contour recognition

Abstract

The application discloses a long profile double-head compensation machining equipment based on internal and external contour identification and relates to the technical field of numerical control machining equipment. The equipment comprises a rack, two machining heads slidingly installed on main guide rails, and a clamping assembly and a driving assembly for clamping and driving a to-be-machined profile to rotate. An external identification assembly for acquiring profile external contour data is arranged on the rack, and a central region of the clamping assembly is provided with an internal identification assembly for acquiring profile internal axial bending state data. A control system constructs a space center line of the profile based on the internal and external contour data and calculates a bending deviation, and when the two machining heads move to corresponding positions, respective feeding mechanisms are controlled to generate compensation displacement. The application can accurately perceive internal and external deformation conditions of the long profile and realize double-head collaborative entity machining compensation.

Description

Technical Field

[0001] This invention relates to the field of CNC machining equipment technology, specifically to a dual-head compensation machining equipment for long profiles based on internal and external contour recognition. Background Technology

[0002] With the rapid development of the aerospace, rail transportation, and new energy vehicle industries, the processing precision requirements for aluminum alloy profiles (such as hollow tubes) are increasing. During the extrusion molding and transportation process, the profiles inevitably undergo multi-directional bending deformation due to residual stress and their own weight.

[0003] Existing adaptive machining equipment for profiles typically employs only single-sided scanning or outer contour detection technology. However, in actual machining, it has been found that the profiles often exhibit hidden defects such as inconsistent internal and external deformation, and uneven wall thickness. Machining models constructed solely from outer contour data cannot accurately reflect the true centerline position of the profile, leading to deviations in machining hole positions or excessive wall thickness cutting, severely impacting product yield. Furthermore, existing dual-head machining equipment lacks a high-precision real-time compensation mechanism during collaborative machining, making it difficult to guarantee machining efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a dual-head compensation processing device for long profiles based on internal and external contour recognition, which solves the technical problems in existing technologies where adaptive processing of long profiles can only obtain the external contour, resulting in inaccurate centerline fitting, inability to detect internal cavity deformation, and lack of real-time compensation mechanism.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dual-head compensation processing device for long profiles based on inner and outer contour recognition, comprising: The frame has a main guide rail along its length. Two processing heads are slidably mounted on the main guide rail, and both processing heads are equipped with a feed mechanism for performing feed movement relative to the profile to be processed; The clamping assembly is rotatably mounted on the frame and is used to clamp the two ends of the profile to be processed. A drive assembly, which is connected to the clamping assembly, is used to drive the profile to be processed to rotate about its axis. An external identification component is mounted on the frame and faces the outer surface of the profile to be processed, and is used to acquire the outer periphery contour data of the profile to be processed when it rotates. An internal identification component is located in the central region of the clamping component's axis and faces the inside of the profile to be processed, for acquiring axial bending state data of the inside of the profile to be processed; The control system is communicatively connected to the two processing heads, the feed mechanism, the clamping assembly, the drive assembly, the external identification assembly, and the internal identification assembly. The control system is configured to: construct a spatial centerline of the profile to be processed based on the peripheral contour data and the axial bending state data, and calculate the bending deviation of the spatial centerline relative to the theoretical axis; when the two processing heads move to the corresponding processing positions of the profile to be processed, control the corresponding feed mechanisms to generate compensating feed displacements to perform physical machining compensation for the bending deviation.

[0006] The above technical solution addresses the problem of traditional equipment relying solely on external contour positioning and failing to detect deformation and uneven wall thickness in hollow profiles. It achieves seamless three-dimensional perception of the profile's true shape, eliminating errors in processing reference data. The control system integrates internal and external data to construct the profile's true spatial centerline and calculates bending deviations, thereby controlling the feed mechanisms of the two processing heads to generate compensating feed displacements. This also solves the processing misalignment problem caused by the multi-directional physical bending of long profiles, achieving dynamic adaptive compensation. This ensures the accuracy of hole positions and milling grooves even when the profile is bent, preventing over-cutting on one side or breakage through walls. The two processing heads slide on the same main guide rail, coordinating with the clamping assembly to drive the profile's rotation. This enables multi-faceted, double-end synchronous adaptive processing of long profiles in a single clamping operation, shortening the processing cycle and improving the overall equipment performance while maintaining processing accuracy.

[0007] Preferably, the clamping assembly includes two synchronous rotary chucks respectively disposed at both ends of the frame, and the two ends of the profile to be processed are respectively inserted into and locked in the two synchronous rotary chucks; the output end of the driving assembly is connected to at least one of the synchronous rotary chucks to drive the two synchronous rotary chucks to rotate synchronously.

[0008] The above technical solution achieves stable suspension and synchronous drive of both ends of the profile to be processed by setting synchronous rotary chucks at both ends of the frame and driving the dual chucks to rotate synchronously through a drive assembly. This eliminates the torsional deformation of the profile to be processed caused by single-end drive during rotation detection and processing, ensuring that the profile to be processed maintains its true physical posture during scanning and cutting, and providing a stable and reliable foundation for high-precision internal and external detection and adaptive compensation.

[0009] Preferably, at least one of the synchronous rotary chucks has a central inner hole that extends axially through the center, and the internal identification component is coaxially disposed in the central inner hole, with the internal identification component facing the other synchronous rotary chuck.

[0010] The above technical solution involves: opening an axially penetrating central inner hole in the center of the synchronous rotary chuck, and coaxially hiding the internal identification component within this central inner hole, with its detection end face facing the synchronous rotary chuck on the opposite side; the internal identification component performs unobstructed coaxial direct measurement of the internal cavity of the profile to be processed, and spatially physically isolates the internal identification component from the externally open machining area, thereby achieving full circumferential scanning of the inner wall morphology data of the profile to be processed, avoiding spatial interference between the internal identification component and the externally moving machining head or spindle tool, and effectively preventing damage to the internal identification component from chip and coolant splashes.

[0011] Preferably, both the internal identification component and the external identification component are line laser profile sensors or laser displacement sensors.

[0012] Through the above technical solution, by uniformly configuring both internal and external identification components as line laser contour sensors or laser displacement sensors, the equipment can perform non-contact, high-frequency dynamic precision scanning of the inner and outer wall morphology of long profiles. It also maintains a high degree of consistency in the selection of underlying hardware and data acquisition communication protocols, thereby simplifying the algorithm complexity of the control system when performing spatial analysis and fusion of internal and external data. This improves the real-time data processing and action response speed of the whole machine during dual-head adaptive compensation processing, while effectively reducing the types of spare parts to be purchased and the subsequent maintenance costs.

[0013] Preferably, a vertical protective partition is provided on the frame along the direction of the main guide rail, the vertical protective partition dividing the space of the frame into a transmission area on the rear side and a processing area on the front side; the vertical protective partition has a transverse through clearance opening corresponding to the two processing heads; the feed mechanism is located in the transmission area, and the two processing heads extend into the processing area through the corresponding clearance opening.

[0014] The above technical solution physically divides the internal space of the equipment into a rear transmission zone and a front machining zone by installing a vertical protective partition along the main guide rail on the frame. The high-precision feed mechanism is hidden and protected within the transmission zone, allowing only the actuating end of the machining head to extend through the clearance opening to the front for cutting operations. This perfectly isolates the extremely harsh heavy-duty cutting environment from the precision transmission components, effectively preventing a large amount of metal chips and coolant splashes generated during the machining of the profile from entering the main guide rail. It solves the problem of severe mechanical wear and precision decay caused by chip jamming or cutting fluid corrosion, ensures the long-term adaptive compensation accuracy of the machine tool, and significantly extends the service life of the entire machine.

[0015] Preferably, each of the two processing heads is equipped with an independently controlled tool magazine; each tool magazine is suspended on the wall of the vertical protective partition facing the processing area, and is located within the travel range of the corresponding processing head.

[0016] The above technical solution involves configuring two independently controlled tool magazines for each machining head, and directly suspending each tool magazine on the wall facing the machining area of ​​the vertical protective partition. These tool magazines are cleverly arranged within the stroke range of the corresponding machining head, allowing the machining head to perform "nearby tool changing" at any machining position on the profile to be processed, without having to travel a long distance back to the fixed tool changing zero point at the end of the frame. This shortens the non-cutting idle time during tool changing. At the same time, this vertical suspension layout avoids the interference of a large amount of chip accumulation at the bottom on the tool magazine changing action, significantly improving the overall cycle time and mass production efficiency of the equipment when facing complex multi-process dual-head collaborative continuous processing.

[0017] Preferably, a chip removal device is provided at the bottom of the frame on one side of the processing area along the extension direction of the main guide rail; the chip removal device is used to receive chips scattered in the processing area and transport the chips to the outside of the frame.

[0018] The above technical solution involves installing a chip removal device along the extension direction of the main guide rail on one side of the machining area at the bottom of the frame. This device can utilize gravity to naturally receive a large number of scattered chips generated during the dual-head heavy-duty cutting process and automatically transport them to the outside of the machine tool in real time. This effectively avoids the local thermal stress concentration and thermal deformation of the machine tool bed caused by the long-term accumulation of a large number of high-temperature chips inside the machine tool. It also ensures the spatial adaptive compensation accuracy of long profiles under high-intensity continuous operation from the physical base, while avoiding the tedious manual cleaning caused by frequent machine stops. This improves the automated continuous unattended mass production capability of the entire equipment.

[0019] Preferably, the feeding mechanism includes: The main slide is slidably mounted on the main guide rail; The Z-guide rail assembly is horizontally positioned on top of the main slide, and its extension direction is perpendicular to the main guide rail. The column is slidably mounted on the Z-guide rail assembly; The Y-guide rail assembly is vertically disposed on the side of the column; A lifting slide block is slidably mounted on the Y-guide rail assembly; Each of the processing heads is fixedly mounted on the lifting slide, so as to realize the compensated feed processing of the profile to be processed by the horizontal feed movement of the column in the Z direction and the vertical lifting movement of the lifting slide in the Y direction.

[0020] Through the above technical solution, the main slide, Z-axis guide rail assembly, column, Y-axis guide rail assembly and lifting slide are sequentially slidably installed in the feed mechanism, providing the machining head fixed on the lifting slide with mutually perpendicular Z-axis horizontal feed movement and Y-axis vertical lifting movement capability. This multi-stage slide and column cooperation mechanical guiding structure not only ensures that the machining head can accurately perform compensated feed displacement in multiple dimensions, but also effectively guarantees the overall structural rigidity and operational stability of the machining head when performing solid cutting on the profile to be processed, thereby effectively ensuring the final processing accuracy of long profiles.

[0021] Preferably, it also includes multiple anti-collision arms, which are horizontally fixedly installed on the inner sides of the two main slides that are close to each other; and the multiple anti-collision arms are arranged in a staggered manner in the horizontal direction perpendicular to the main guide rail.

[0022] The above technical solution involves horizontally fixing anti-collision arms to the inner surfaces of multiple main slides that are close to each other, and arranging these anti-collision arms in a staggered manner in a horizontal direction perpendicular to the main guide rail. This allows the anti-collision arms to interlock and directly abut against the opposing main slides when the two main slides approach each other to their limit positions along the main guide rail. This staggered physical limiting structure effectively avoids the bending and instability that can easily occur when the anti-collision arms collide end-to-end. It provides a stable and reliable final physical anti-collision protection for the two processing heads that move towards each other on the same main guide rail, effectively preventing serious mechanical interference and damage caused by accidental proximity between the two processing heads.

[0023] Preferably, the control system is further configured to: calculate the relative distance between the two processing heads based on their real-time positions; when the relative distance is less than a preset safety distance threshold, control the processing head with the lower priority to decelerate and avoid or retreat to a safe area according to the priority of the current processing step, so as to prevent spatial interference between the two processing heads during the compensation processing.

[0024] The above technical solution involves the control system calculating the relative distance between the two processing heads based on their real-time positions. When this relative distance is less than a preset safety distance threshold, the system controls the processing head with the lower priority to decelerate and avoid collisions or retreat to a safe area according to the priority of the current processing step. This establishes a dynamic intelligent anti-collision intervention mechanism for the equipment. This priority-based collaborative control logic not only effectively prevents mechanical interference and collision damage caused by the intersection of motion trajectories between the two processing heads during the complex and ever-changing three-dimensional space compensation processing, but also ensures the continuous execution of high-priority core processing steps, improving the safety, reliability, and overall processing efficiency of dual-head collaborative continuous operation.

[0025] This invention provides a dual-head compensation processing device for long profiles based on inner and outer contour recognition. It has the following beneficial effects: 1. This invention achieves synchronous, unobstructed, non-contact scanning of the outer contour and axial bending state of the inner cavity of the profile to be processed by cooperating with an external identification component and an internal identification component coaxially hidden in the chuck's inner hole. The control system constructs a spatial centerline that conforms to the actual physical deformation of the profile based on the fused internal and external data, thereby guiding the feed mechanism of the processing head to generate dynamically compensated feed displacement. This solution overcomes the shortcomings of existing technologies that rely solely on outer wall positioning and suffer from cut-through or hole misalignment due to inconsistent deformation of the inner and outer walls, effectively ensuring the three-dimensional processing accuracy of the profile to be processed.

[0026] 2. This invention employs a dual synchronous rotary chuck to clamp and synchronously rotate the profile to be processed, eliminating torsional deformation errors during processing and identification. Two processing heads, configured on the same main guide rail, are supported by a high-rigidity multi-stage orthogonal cross feed mechanism. Combined with an independent follow-up tool magazine suspended on a vertical protective partition, this achieves efficient collaborative processing of both ends and multiple surfaces of the profile in a single clamping operation, along with rapid tool changes at the nearest location. This ensures cutting stability, significantly reduces non-cutting idle time, and substantially improves the overall production cycle time of the machine tool.

[0027] 3. This invention, by installing a vertical protective partition on the frame, completely isolates the high-precision feed transmission mechanism from the machining area physically. Combined with a chip removal device along the bottom of the guide rail, this effectively prevents metal chips and coolant from corroding the core transmission components, eliminating the risk of localized thermal deformation of the machine tool caused by excessive chip accumulation. Building upon this protection, the invention incorporates a dynamic avoidance intervention mechanism based on real-time relative spacing and process priority in the control system, and sets up staggered hardware anti-collision arms on the inner side of the main slide. This dual anti-collision mechanism, composed of software-predicted retreat and hardware physical limits, reduces the risk of mechanical interference and damage during high-speed collaborative compensation machining of two machining heads on the same main guide rail, fundamentally establishing the safety and long-term accuracy maintenance capability of the entire equipment under complex working conditions and unattended continuous operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a dual-head compensation processing device for long profiles based on inner and outer contour recognition according to the present invention. Figure 2 This is a schematic diagram of the rear side of a long profile dual-head compensation processing device based on inner and outer contour recognition according to the present invention. Figure 3 This is a schematic diagram showing the cooperation between the feed mechanism and the main guide rail of the present invention; Figure 4 This is a schematic diagram of the installation of the internal identification component of the present invention; Explanation of icon numbers: 10. Frame; 11. Main guide rail; 12. Vertical protective partition; 121. Clearance opening; 13. Chip removal device; 20. Machining head; 21. Feed mechanism; 211. Main slide; 212. Z-guide rail assembly; 213. Column; 214. Y-guide rail assembly; 215. Lifting slide; 230. Anti-collision arm; 30. Clamping assembly; 310. Synchronous rotary chuck; 311. Central inner hole; 40. Drive assembly; 50. External identification assembly; 60. Internal identification assembly; 70. Control system; 80. Tool magazine. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This embodiment provides a dual-head compensation machining device for long profiles based on internal and external contour recognition. It is mainly used for high-precision hole machining, milling, or end structure machining of hollow or semi-hollow profiles with large lengths. Because long profiles are prone to axial bending, twisting, or uneven wall thickness during production, transportation, or storage, traditional machine tools typically use only the outer surface of the profile as a positioning reference, making it difficult to accurately reflect the actual internal geometry of the profile. This can easily lead to problems such as hole misalignment, uneven cutting load, or even localized cut-through. This invention constructs a synchronous internal and external contour recognition and machining compensation system, enabling the device to perform dynamic compensation machining based on the true shape of the profile, thereby significantly improving the machining accuracy and stability of long profiles.

[0031] Reference Figures 1 to 4 As shown, the long profile double-head compensation processing equipment of this embodiment includes a frame 10, a main guide rail 11, two processing heads 20, a feed mechanism 21, a clamping assembly 30, a drive assembly 40, an external identification assembly 50, an internal identification assembly 60, and a control system 70.

[0032] The frame 10 has a main guide rail 11 along its length; two processing heads 20 are slidably mounted on the main guide rail 11, and each processing head 20 is equipped with a feed mechanism 21 for performing feed movement relative to the profile to be processed; the clamping assembly 30 is rotatably mounted on the frame 10 for clamping both ends of the profile to be processed; the drive assembly 40 is drively connected to the clamping assembly 30 for driving the profile to be processed to rotate around its axis; the external identification assembly 50 is disposed on the frame 10 and faces the outer surface of the profile to be processed; the internal identification assembly 60 is disposed in the central area of ​​the clamping assembly 30 along its axis and faces the interior of the profile to be processed.

[0033] The frame 10 serves as the basic load-bearing structure for the entire machine. It is typically manufactured using an integral welded bed or a high-rigidity cast bed structure to ensure the overall stability of the machine during long-stroke machining processes. A main guide rail 11 is provided along the length of the frame 10. The main guide rail 11 can be a high-precision linear guide pair or a heavy-duty roller guide pair, and its main function is to provide guiding support for the two machining heads 20 to move along the profile axial direction.

[0034] Two processing heads 20 are slidably mounted on the main guide rail 11 and can move along the direction of the main guide rail 11. This structural arrangement allows the two processing heads 20 to process the two ends of the profile to be processed, thereby achieving dual-end collaborative processing and improving overall processing efficiency. Each processing head 20 is equipped with a feed mechanism 21. The feed mechanism 21 drives the processing head 20 to move spatially relative to the profile to be processed, so that the cutting tool of each processing head 20 can cut the profile according to a set path.

[0035] In this embodiment, the feeding mechanism 21 includes a main slide 211, a Z-axis guide rail assembly 212, a column 213, a Y-axis guide rail assembly 214, and a lifting slide 215. The main slide 211 is slidably mounted on the main guide rail 11 and can move along the direction of the main guide rail 11, thereby realizing the position adjustment of the processing head 20 along the length direction of the profile; the Z-axis guide rail assembly 212 is disposed on the top of the main slide 211, and its extension direction is perpendicular to the main guide rail 11. The column 213 is slidably mounted on the Z-axis guide rail assembly 212, thereby enabling each processing head 20 to move laterally; the Y-axis guide rail assembly 214 is mounted vertically on the side of the column 213, and the lifting slide 215 is slidably mounted on the Y-axis guide rail assembly 214. Each processing head 20 is fixedly mounted on the lifting slide 215, thereby enabling each processing head 20 to move vertically. Through the above structural arrangement, each processing head 20 can achieve multi-dimensional movement in the axial, transverse and vertical directions, thereby enabling precise compensation feed according to the instructions of the control system 70.

[0036] To stably clamp the profile to be processed, this embodiment provides clamping assemblies 30 at both ends of the frame 10. Each clamping assembly 30 includes two synchronous rotary chucks 310. The two synchronous rotary chucks 310 are respectively installed at both ends of the frame 10 and are used to clamp the two ends of the profile to be processed. The two ends of the profile to be processed are respectively inserted into the corresponding synchronous rotary chucks 310 and locked in place by the clamping mechanism of the synchronous rotary chucks 310, thereby achieving stable positioning of the profile.

[0037] The drive assembly 40 is connected to one of the synchronous rotary chucks 310 via a gear transmission mechanism, synchronous belt transmission mechanism, or coupling structure to drive the synchronous rotary chuck 310. Simultaneously, the synchronous transmission keeps the other synchronous rotary chuck 310 rotating synchronously, thereby driving the profile to be processed to rotate stably around its own axis. By employing a clamping structure with synchronous rotary chucks 310 at both ends, torsional errors caused by driving from only one end can be effectively avoided, ensuring the profile maintains a stable posture during rotational scanning and processing.

[0038] To acquire information about the external geometric shape of the profile to be processed, an external identification component 50 is provided on the frame 10. The external identification component 50 is positioned facing the outer surface of the profile to be processed and can continuously scan the outer periphery of the profile during its rotation. To acquire information about the internal bending of the profile to be processed, this embodiment also includes an internal identification component 60. The internal identification component 60 is mounted in the central region of the clamping assembly 30's axis and probes the interior of the profile to be processed.

[0039] Specifically, a central inner hole 311 extending axially is provided at the center of one of the synchronous rotary chucks 310. An internal identification component 60 is coaxially mounted in the central inner hole 311, and the internal identification component 60 is positioned toward the other synchronous rotary chuck 310, thereby enabling it to detect the interior of the profile to be processed along the inner cavity direction of the profile to be processed.

[0040] This structural design enables the internal identification component 60 to detect the internal morphology of the profile to be processed without interfering with the processing area, while also preventing the chips and coolant generated during processing from affecting the internal identification component 60.

[0041] In this embodiment, both the external identification component 50 and the internal identification component 60 can be line laser contour sensors or laser displacement sensors. When the profile to be processed rotates around the axis under the drive of the drive component 40, the external identification component 50 continuously scans the outer surface of the profile to obtain the profile's outer perimeter contour data; at the same time, the internal identification component 60 probes the inner wall of the profile to obtain the inner bending state data of the processed profile.

[0042] The control system 70 is communicatively connected to the two processing heads 20, the feed mechanism 21, the clamping assembly 30, the drive assembly 40, the external identification assembly 50, and the internal identification assembly 60, respectively, and is used to coordinate and control the various units of the equipment.

[0043] During the operation of this equipment, the control system 70 fuses and calculates deviations of internal and external data based on a spatial analysis algorithm, specifically as follows: The axis of the main guide rail 11 is taken as the X-axis; the vertical lifting direction of the lifting slide 215 is taken as the Y-axis, corresponding to the Y-axis guide rail assembly 214; the horizontal feed direction of the column 213 is taken as the Z-axis, corresponding to the Z-axis guide rail assembly 212, establishing a global three-dimensional coordinate system for the machine tool. When the profile to be processed rotates, the control system 70 synchronously acquires the contour data of the external identification component 50 and the internal identification component 60, and combines this with the real-time rotation angle of the drive component 40 to uniformly map the internal and external point cloud data into this three-dimensional coordinate system. The point cloud is divided into multiple sections along the X-axis. The internal and external contour point clouds of each section are extracted, and the true physical centroid coordinates (xk, yk, zk) of that specific section are calculated using the least squares method. Subsequently, based on the discrete centroid point set distributed along the axial direction, a spatial curve polynomial fitting algorithm is called to generate a smooth true physical space centerline model, whose analytical equation is expressed as: Y(x) = f(x); Z(x) = g(x); The theoretical axes clamped at both ends of the clamping assembly 30 are ideal straight lines with Y=0 and Z=0 in this coordinate system. At any axial machining position xm, the dynamic bending deviations calculated by the control system 70 are as follows: Vertical bending deviation: Δym = f(xm); Horizontal bending deviation: Δzm = g(xm); When the two machining heads 20 move to the corresponding axial machining position xm, the control system 70 sends a deviation command to the corresponding feed mechanism 21. By controlling the lifting slide 215 to move an additional Δym along the Y-guide rail assembly 214, and simultaneously controlling the column 213 to move an additional Δzm along the Z-guide rail assembly 212, real-time three-dimensional solid compensation for the profile bending deviation is achieved.

[0044] In addition, for complex collaborative machining conditions where two machining heads 20 move towards each other on the same main guide rail 11, the control system 70 is equipped with a dynamic intelligent collision avoidance and intervention module. Throughout the entire cycle of dual-head collaborative compensation machining, the control system 70 reads and analyzes the positions on the two feed mechanisms 21 in real time, and calculates the real-time relative distance between the two machining heads 20 in three-dimensional space. When the relative distance decreases and approaches the preset safety distance threshold set internally by the system, the collision avoidance interference algorithm is triggered in a timely manner.

[0045] After the anti-collision mechanism is triggered, the control system 70 automatically reads and compares the priority weights of the machining operations currently being performed by the two machining heads 20. Specifically, the system assigns high priority to high-precision cutting operations that are currently in deep hole drilling, heavy-duty milling, or contour finishing; while assigning low priority to operations that are in rapid idle travel, tool change preparation, or roughing. Based on this determination, the control system 70 proactively issues an intervention command to the lower-priority machining head 20, controlling the corresponding feed mechanism 21 to perform smooth deceleration, hover in place to avoid collision, or reverse back to outside the safe interference zone, thereby making room for the high-priority machining head 20. After the high-priority operation is completed and the machine leaves the interference zone, the low-priority component automatically resumes and enters the preset machining trajectory. This dynamic software prediction and intervention mechanism based on real-time spacing and operation priority, redundant with the physical misalignment anti-collision arm on the main slide, constructs a dual safety defense line of "soft and hard combination," ensuring the efficiency and safety of continuous dual-head collaborative operation.

[0046] To protect the precision transmission mechanism inside the equipment, this embodiment features a vertical protective partition 12 along the main guide rail 11 on the frame 10. The vertical protective partition 12 divides the internal space of the frame into a rear transmission zone and a front machining zone. Precision transmission structures such as the feed mechanism 21 are located within the transmission zone, while the actuating end of each machining head 20 extends into the machining zone through an avoidance opening 121 on the vertical protective partition 12, thereby performing cutting operations. Furthermore, to ensure the dynamic sealing of the machining head 20 during long-stroke interpolation movement along the main guide rail 11, a flexible protective cover is provided at the avoidance opening 121. This flexible protective cover can be a telescopic bellows cover or a laminated steel plate cover. The flexible protective cover expands and contracts synchronously with the translation of the machining head 20, thus forming a fully enclosed physical isolation barrier. This structure effectively prevents high-speed metal chips and high-pressure coolant generated under heavy cutting conditions from entering the transmission area, fundamentally eliminating the risk of mechanical wear and loss of precision caused by chip jamming or hydraulic corrosion of the main guide rail 11 and the transmission screw.

[0047] Furthermore, a chip removal device 13 is installed along the main guide rail 11 on one side of the machining area at the bottom of the frame 10. The chip removal device 13 is used to collect metal chips generated during machining and automatically transport the chips to the outside of the frame, thereby preventing chips from accumulating inside the equipment. Further, considering the large chip volume of the double-head heavy-duty cutting of the profile to be processed and the extremely high cutting heat of the chips themselves, the bottom of the frame 10 is preferably machined as a guide slope inclined towards the chip removal device 13. The scattered high-temperature chips quickly slide into the chip removal device 13 under the action of gravity and coolant flushing and are discharged outside the machine in real time. Simultaneously, a solid-liquid separation filter and a return tank are installed at the bottom of the chip removal device 13 to achieve the filtration and recycling of the cutting fluid. This automated chip removal and liquid-solid separation mechanism not only eliminates the need for frequent shutdowns for slag removal, but more importantly, it effectively prevents localized thermal stress concentration and bed thermal deformation caused by the long-term accumulation of a large amount of high-temperature chips inside the frame 10. From the perspective of chassis thermodynamic stability, it effectively ensures the spatial compensation accuracy of the whole machine under long-term, high-load continuous operation.

[0048] Reference Figure 1 As shown, to achieve efficient continuous processing of complex multi-stage processes, each of the two processing heads 20 is equipped with an independently controlled tool magazine 80. Each tool magazine 80 is suspended on the wall of the vertical protective partition 12 facing the front processing area, and is located within the travel range of each corresponding processing head 20. This vertically suspended layout allows each processing head 20 to directly call upon the corresponding tool magazine 80 for "nearby tool changing" at any processing position of the profile to be processed, without having to travel a long distance back to the fixed tool changing zero point at the end of the frame 10. This not only shortens the non-cutting idle time during tool changing, but also perfectly avoids the physical interference of a large amount of chip accumulation at the bottom on the tool changing action of the tool magazine 80, significantly improving the overall cycle time and mass production efficiency of the equipment during dual-head collaborative continuous processing.

[0049] Figure 2As shown, to prevent the two processing heads 20 from colliding during movement, this embodiment provides multiple anti-collision arms 230 on the inner surfaces of the two main slides 211 that are close to each other. The multiple anti-collision arms 230 are arranged in a staggered manner in the horizontal direction perpendicular to the main guide rail 11. When the two processing heads 20 move to their limit positions, the multiple anti-collision arms 230 can intersect and abut against the opposing main slides 211, thereby forming a reliable physical limiting structure. Furthermore, the core mechanical advantage of the aforementioned staggered arrangement is that when the two main slides 211 are abnormally close, the multiple anti-collision arms 230 avoid each other in horizontal space and intersect, thereby directly transmitting and dispersing the huge transient kinetic energy generated by the impact into the overall rigid structure of the main slides 211 and the main guide rail 11. Preferably, the multiple anti-collision arms 230 are energy-absorbing and damping components such as polyurethane elastomer buffer blocks or high-frequency hydraulic buffers. This energy-absorbing damping component can convert rigid impact into damping deformation work at the moment of extreme mechanical interference, thereby achieving flexible stopping of the main slide 211 and protecting the two processing heads 20 from stress damage to the greatest extent.

[0050] Reference Figures 1 to 4 As shown, the equipment's workflow during actual operation is as follows: First, the operator places the profile to be processed between two synchronous rotary chucks 310 and locks both ends of the profile in place using the chuck clamping mechanism. Then, the control system 70 activates the drive assembly 40, causing the two synchronous rotary chucks 310 to rotate synchronously, thereby driving the profile to be processed to rotate stably around its axis. During the rotation of the profile, the external identification component 50 continuously scans the outer surface of the profile to acquire its outer perimeter contour data; simultaneously, the internal identification component 60 probes the inner wall of the profile to acquire its internal axial bending state data. The control system 70 fuses and processes the above data and constructs a spatial centerline model of the profile to be processed based on the scanning results. By comparing this spatial centerline with the theoretical axis, the bending deviation of the profile at different locations can be calculated.

[0051] After completing the data analysis, the control system 70 corrects the preset processing trajectory based on the bending deviation and generates a compensated processing trajectory. Subsequently, the two processing heads 20 move along the main guide rail 11 to their respective processing areas. During the processing, the control system 70 controls the feed mechanism 21 to perform multi-dimensional feed motion according to the compensated trajectory, so that each processing head 20 performs cutting processing on the profile to be processed according to the compensated processing trajectory, thereby realizing the physical compensation for the bending deviation of the profile.

[0052] During processing, the control system 70 also monitors the relative position between the two processing heads 20 in real time. When the relative distance between the two processing heads 20 is detected to be less than a preset safe distance threshold, the control system 70 will control the processing head with lower priority to decelerate and avoid or retreat to a safe area according to the priority of the current processing step, thereby avoiding mechanical interference between the two processing heads. After all processing steps are completed, the drive assembly 40 stops working, the synchronous rotary chuck 310 is released, and the operator can take out the processed profile. Through the above structure and working method, the present invention can still ensure high precision in processing position even when the profile to be processed is bent or deformed, thereby significantly improving the reliability and stability of long profile processing.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-head compensation processing device for long profiles based on inner and outer contour recognition, characterized in that, include: The frame (10) has a main guide rail (11) along its length. Two processing heads (20) are slidably mounted on the main guide rail (11), and each is provided with a feeding mechanism (21) for feeding the profile to be processed. The clamping assembly (30) is rotatably mounted on the frame (10) and is used to clamp both ends of the profile to be processed; The drive assembly (40) is connected to the clamping assembly (30) for driving the profile to be processed to rotate around its axis; An external identification component (50) is disposed on the frame (10) and faces the outer surface of the profile to be processed, and acquires the outer periphery contour data of the profile to be processed when it rotates; An internal identification component (60) is located in the central region of the axis of the clamping component (30) and faces the inside of the profile to be processed, and acquires the axial bending state data of the inside of the profile to be processed; The control system (70) is communicatively connected to the two processing heads (20), the feed mechanism (21), the clamping assembly (30), the drive assembly (40), the external identification assembly (50), and the internal identification assembly (60), respectively. The control system (70) is configured to: construct the spatial centerline of the profile to be processed based on the peripheral contour data and the axial bending state data, and calculate the bending deviation of the spatial centerline relative to the theoretical axis; when the two processing heads (20) move to the corresponding processing position, control the corresponding feed mechanism (21) to generate a compensating feed displacement, and perform physical processing compensation for the bending deviation.

2. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 1, characterized in that: The clamping assembly (30) includes two synchronous rotary chucks (310) respectively disposed at both ends of the frame (10). The two ends of the profile to be processed are respectively inserted into and locked in the two synchronous rotary chucks (310). The output end of the drive assembly (40) is connected to at least one of the synchronous rotary chucks (310) to drive the two synchronous rotary chucks (310) to rotate synchronously.

3. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 2, characterized in that: At least one of the synchronous rotary chucks (310) has a central inner hole (311) that extends through the axis, and the internal identification component (60) is coaxially disposed in the central inner hole (311), and the internal identification component (60) is disposed toward the other synchronous rotary chuck (310).

4. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 1, characterized in that: Both the internal identification component (60) and the external identification component (50) are line laser profile sensors or laser displacement sensors.

5. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 1, characterized in that: A vertical protective partition (12) is provided on the frame (10) along the direction of the main guide rail (11). The vertical protective partition (12) divides the space of the frame (10) into a transmission area on the rear side and a processing area on the front side. A transverse clearance opening (121) is provided on the vertical protective partition (12) corresponding to the two processing heads (20). The feed mechanism (21) is located in the transmission area, and the two processing heads (20) extend into the processing area through the corresponding clearance opening (121).

6. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 5, characterized in that: The two processing heads (20) are each equipped with an independently controlled tool magazine (80); each tool magazine (80) is suspended on the wall of the vertical protective partition (12) facing the processing area and is located within the travel range of the corresponding processing head (20).

7. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 5, characterized in that: The bottom of the frame (10) is provided with a chip removal device (13) on one side of the processing area along the extension direction of the main guide rail (11); the chip removal device (13) is used to receive the chips scattered in the processing area and transport the chips to the outside of the frame (10).

8. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 1, characterized in that, The feeding mechanism (21) includes: a main slide (211), which is slidably mounted on the main guide rail (11); a Z-guide rail assembly (212), which is horizontally arranged on the top of the main slide (211) and its extension direction is perpendicular to the main guide rail (11); a column (213), which is slidably mounted on the Z-guide rail assembly (212); a Y-guide rail assembly (214), which is arranged vertically on the side of the column (213); and a lifting slide (215), which is slidably mounted on the Y-guide rail assembly (214). Each processing head (20) is fixedly mounted on the lifting slide (215) so as to realize the compensated feed processing of the profile to be processed by the Z-direction horizontal feed movement of the column (213) and the Y-direction vertical lifting movement of the lifting slide (215).

9. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 8, characterized in that: The feeding mechanism (21) also includes multiple anti-collision arms (230), which are horizontally fixed on the inner sides of the two main slides (211) that are close to each other; and the multiple anti-collision arms (230) are arranged in a staggered manner in the horizontal direction perpendicular to the main guide rail (11).

10. The dual-head compensation processing equipment for long profiles based on inner and outer contour recognition according to claim 1, characterized in that: The control system (70) is further configured to: calculate the relative distance between the two processing heads (20) based on their real-time positions; when the relative distance is less than a preset safety distance threshold, control the processing head with the lower priority to decelerate and avoid or retreat to a safe area according to the priority of the current processing procedure, so as to prevent the two processing heads (20) from interfering with each other during the compensation processing.

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