Polishing device for formed aluminum alloy pipe

Abstract

The invention relates to aluminum alloy pipe machining equipment, in particular to a polishing device for a formed aluminum alloy pipe. The right support and the left support are arranged in parallel at the same height, the left support is provided with an inner polishing part capable of going deep back and forth, and the right support is provided with a rotating part capable of driving a pipe to rotate. According to the grinding device for the formed aluminum alloy pipe, a left support and a right support which are symmetrically arranged form a main body frame, the front end of the left support is provided with an inner grinding part capable of conducting feeding movement in the front-back direction, and the right support is correspondingly provided with a rotating part for driving the pipe to rotate; the rotating part comprises two sets of supporting rollers coaxially installed on the right support, and a plurality of grinding blocks used for grinding the outer surfaces are evenly distributed on the peripheries of roller bodies of the supporting rollers. The inner grinding part carries a moving seat capable of longitudinally sliding through a left support guide rail, a grinding shaft capable of rotating at a high speed is arranged in the moving seat, the tail end of the grinding shaft is rigidly connected with a multi-blade grinding head used for inner wall machining, and progressive grinding of the grinding head in an inner cavity of the pipe is achieved through axial feeding driving of the moving seat.

Description

Technical Field

[0001] The present invention relates to aluminum alloy pipe processing equipment, and in particular to a grinding device for aluminum alloy pipes after forming. Background Art

[0002] Due to its lightweight and high-strength characteristics, aluminum alloy pipes are widely used in fields such as aerospace, automotive manufacturing, and construction. After forming, burrs, welding slag, or oxide layers often exist on the inner and outer surfaces of the pipes, and grinding treatment is required to improve the surface quality. Traditional grinding processes usually use split-type equipment: the outer surface grinding relies on manual operation of a belt grinder or a fixed polishing disc, and additional telescopic grinding heads are required for inner wall treatment. Such methods have the following defects: Low efficiency due to scattered processes: The inner and outer surfaces need to be clamped multiple times, and the positioning error leads to coaxiality deviation. Especially for long pipe fittings, repeated adjustment significantly reduces the processing efficiency; Uneven outer surface grinding: Conventional support rollers only have a rotational drive function, and the contact pressure between the grinding tool and the pipe is unstable, easily resulting in spiral lines or local over-grinding; Poor inner wall grinding accuracy: The telescopic grinding shaft with manual feed is prone to deviating from the axis, resulting in uneven inner wall thickness and lacking a compensation mechanism for the radial runout of the pipe; Insufficient equipment adaptability: The traditional chain drive system is prone to slack due to wear, affecting the driving stability, and lacking a quick-adjusting clamping mechanism when the pipe diameter changes.

[0003] In view of the above defects, the inventor actively conducts research and innovation in order to create a grinding device for aluminum alloy pipes after forming, making it more valuable in industry. Summary of the Invention

[0004] To solve the above technical problems, the purpose of the present invention is to provide a grinding device for aluminum alloy pipes after forming.

[0005] A grinding device for aluminum alloy pipes after forming according to the present invention includes a left bracket and a right bracket arranged parallel and at the same height as the left bracket. There is an inner grinding part on the left bracket that can move forward and backward, and a rotating part on the right bracket that can drive the pipe to rotate; The rotating part includes two groups of support rollers coaxially arranged on the right bracket, and the surfaces of the support rollers are covered with multiple grinding blocks for grinding; The inner grinding part includes a moving seat arranged on the left bracket that can move forward and backward, a rotatable grinding shaft is fixed on the moving seat, and a grinding head is fixed at the end of the grinding shaft.

[0006] The grinding device for the formed aluminum alloy pipe mainly consists of a main frame formed by symmetrically arranged left and right brackets. The front end of the left bracket is equipped with an inner grinding part that can move forward and backward, and the right bracket is correspondingly provided with a rotating part for driving the pipe to rotate. The rotating part includes two groups of supporting rollers coaxially installed on the right bracket, and a plurality of grinding blocks for outer surface grinding are evenly distributed on the outer periphery of the roller body. The inner grinding part is carried by a left bracket guide rail with a movable seat that can slide longitudinally. The movable seat is internally provided with a grinding shaft that can rotate at a high speed. The end of the grinding shaft is rigidly connected with a multi-edge grinding head for inner wall processing, and the progressive grinding operation of the grinding head in the pipe cavity is realized by driving the axial feed of the movable seat.

[0007] Further, both ends of the supporting roller are installed in the bearing seat through shafts, and the bottom of the bearing seat is matched with a slide rail installed on the right bracket through a slider.

[0008] Both ends of the supporting roller are assembled in the bearing seat through shafts to form a rotating support structure. The bottom of the bearing seat is slidably matched with a preset slide rail on the right bracket, so that the supporting roller can be adjusted horizontally along the slide rail. The linear guiding function of the slide rail and the restraining effect of the slider jointly ensure that the axis parallelism of the supporting roller is maintained during displacement, and thus the accurate positioning of the pipe clamping center line is realized.

[0009] Further, a tightening mechanism for pressing against the side wall of the pipe is fixed on both sides of the middle part of the right bracket. Each tightening mechanism includes a vertical plate fixed to the right bracket. There is a screw sleeve on the vertical plate, and a screw is screwed into the screw sleeve. The top end of the screw abuts against the bearing seat for installing the supporting roller, and a rotating disk is installed at the tail end of the screw.

[0010] Tightening mechanisms for clamping the side wall of the pipe are symmetrically installed on both sides of the middle part of the right bracket. Each tightening mechanism includes a vertical plate rigidly connected to the right bracket. A screw sleeve with a horizontally arranged axis is welded on the vertical plate, and a screw that can be adjusted axially is screwed into the internal thread of the screw sleeve. The front end of the screw forms a pressing contact with the back surface of the bearing seat of the supporting roller, and a manual rotating disk with anti-slip lines is fixed at the tail end of the screw. By driving the screw to move axially along the screw sleeve through the rotating disk, the bearing seat of the supporting roller is pushed to move horizontally on the slide rail, so as to accurately control the radial clamping force of the pipe. After the adjustment is completed, the position of the screw is fixed by a locking nut to ensure the clamping stability during the processing.

[0011] Further, a first motor is installed on the middle support plate of the right bracket. Driven gears are fixed on the two supporting rollers, and a driving gear is installed on the output shaft of the first motor. The driven gear and the driving gear are driven by a chain.

[0012] A first motor is fixedly installed on the middle support plate of the right support. The ends of two support rollers are coaxially and fixedly connected with driven gears. The output shaft end of the first motor is equipped with a driving gear. The driving gear and the two driven gears are meshed and linked by a closed transmission chain, forming a double-gear synchronous drive system. The torque output of the first motor drives the chain drive, driving the two support rollers to rotate in the same speed and opposite directions, and then driving the pipe to rotate stably on the surface of the grinding block, ensuring the uniformity and continuity of the outer wall grinding operation.

[0013] Further, a cross plate is fixed below the middle of the right support. There is a through hole at the end of the cross plate. A guide rod passes through the through hole. The upper end of the guide rod is fixed with a tension wheel mounting seat. A tension gear is movably installed in the tension wheel mounting seat through a shaft. The chain bypasses the tension gear. The lower end of the guide rod has an outwardly protruding retaining ring. A spring is installed between the retaining ring and the bottom of the cross plate.

[0014] A horizontal cross plate is welded below the middle of the right support. A vertical through hole is opened at the end of the cross plate. A guide rod that can slide axially is installed through the through hole. The top of the guide rod is fixedly connected with a tension wheel mounting seat. A tension gear is movably assembled in the mounting seat through a bearing and a pin shaft. The transmission chain bypasses the tension gear to form a tensioning loop. The bottom end of the guide rod is provided with an outwardly protruding retaining ring. A preloading spring is sleeved between the retaining ring and the bottom surface of the cross plate. The elastic deformation of the spring pushes the guide rod to float axially along the through hole, enabling the tension gear to compensate in real time for the slack of the chain caused by wear or load changes, maintaining a constant meshing tightness of the transmission system. The retaining ring also serves as a spring stroke limiting mechanism to prevent the guide rod from detaching from the cross plate.

[0015] Further, a plurality of "L"-shaped support rods are fixed on one side of the right support. The top of the support rod is fixed with a downward pressing cylinder. The telescopic rod of the downward pressing cylinder is movably installed with a pressure wheel frame through a shaft. The pressure wheel frame is arc-shaped, and two pressure wheels are installed at both ends through shafts.

[0016] A plurality of support rods in an "L" shape are welded on one side of the right support. The top of the support rod is rigidly connected with a downward pressing cylinder. The end of the piston rod of the downward pressing cylinder is movably assembled with an arc-shaped pressure wheel frame through a hinge shaft. Two pressure wheels are symmetrically installed at both ends of the pressure wheel frame through rolling bearings. When the cylinder expands and contracts, it can drive the pressure wheel frame to swing around the axis, enabling the two pressure wheels to move vertically synchronously. By adjusting the cylinder pressure, the elastic contact pressure of the pressure wheels on the surface of the pipe is controlled, which not only avoids rigid impact damage to the pipe surface but also ensures the stable axial positioning of the pipe during the processing, preventing radial offset or vibration caused by centrifugal force during rotary grinding.

[0017] Further, there are two parallel guide rails on the upper surface of the left support. The slider at the bottom of the moving seat is matched with the guide rails. A driving motor is installed on one side of the moving seat. The driving motor is connected with a corner speed reducer. The output shaft of the corner speed reducer passes through the bottom plate of the moving seat and then a translation gear is installed. The translation gear meshes with a rack fixed on the left support.

[0018] The upper surface of the left bracket is provided with two high-precision parallel linear guide rails. The bottom of the moving seat is integrated with a double-slider structure to form a rolling friction pair with the guide rails. The side wall of the moving seat is bolted with a driving motor. The driving motor is directly connected to the input end of the angular speed reducer through a flange. The output shaft of the angular speed reducer vertically penetrates the bottom plate of the moving seat and is keyed to connect a translation gear. This translation gear forms a precision meshing pair with a hardened rack pre-installed on the side of the left bracket. Through the forward and reverse rotation control of the driving motor, after the torque of the angular speed reducer is amplified and transmitted at a right angle, the translation gear is driven to make a linear rotary motion along the rack, thereby driving the moving seat to precisely advance and retreat axially along the guide rails. The guide rail-slider system ensures that the moving seat still maintains low friction, high rigidity, and repeated positioning accuracy when carrying the grinding device. The rack meshing transmission method has both transmission efficiency and anti-lateral load capacity, meeting the process requirements of axial feeding and grinding of pipes.

[0019] Further, there is a grinding motor bracket in the middle of the moving seat. The top of the grinding motor bracket is fixed with a second motor. The output shaft of the second motor and the tail end of the grinding shaft are driven by a pulley and a belt. The grinding shaft is movably installed between the bottom plate of the moving seat through a bearing seat. The end of the left bracket is bolted with a frame-shaped vertical bracket. Two guide wheels with the same structure are arranged up and down through a shaft inside the vertical bracket. The middle of the guide wheel is concave in the shape of an arc and fits the outer ring of the grinding shaft.

[0020] The middle of the moving seat is integrated with a vertically welded grinding motor bracket. The top of the bracket is rigidly connected to the second motor through a flange. The output shaft of the second motor and the tail end of the grinding shaft are respectively equipped with multi-wedge belt pulleys and form a high-speed power transmission system through a synchronous belt. The grinding shaft is rotationally fitted with the bottom plate of the moving seat through high-precision bearing seats at both ends. The end of the left bracket is fixed with a rectangular frame-shaped vertical bracket by high-strength bolts. A pair of guide wheels of the same specification are symmetrically arranged up and down inside the vertical bracket. The middle of the guide wheel is processed with a concave arc surface matching the outer circle curvature of the grinding shaft. The high-speed rotating grinding shaft is enveloped and limited by the symmetrically distributed guide wheels up and down, effectively suppressing the radial runout of the shaft system during grinding operations and ensuring the dynamic concentricity between the grinding tool and the axis of the pipe. The synchronous belt transmission mechanism has the characteristic of overload slip protection. The elastic pre-pressure contact design of the guide wheels can adaptively compensate for the thermal deformation of the grinding shaft and maintain a stable contact pressure.

[0021] With the above solutions, the present invention has at least the following advantages: 1. Structural optimization and improvement of dynamic stability: Through the coordinated action of the double-guide-rail slider system of the left bracket and the rack and gear drive mechanism of the moving seat, combined with the torque output of the driving motor and the angular speed reducer, the smoothness of the axial feeding of the moving seat is achieved; the low-friction characteristics of the guide rail-slider pair and the high-rigidity transmission of the rack meshing significantly improve the load-bearing capacity and repeated positioning accuracy, ensuring the dynamic stability of the grinding shaft during high-speed rotation.

[0022] 2. Radial runout suppression and concentricity control: The guide wheels arranged symmetrically in the vertical frame fit with the outer circle of the grinding shaft through the concave arc surface, forming an envelope-type limit constraint to effectively offset radial vibration; combined with the slewing support of the high-precision bearing seats at both ends of the grinding shaft, the concentricity of the grinding tool and the pipe axis is dynamically maintained to avoid eccentric wear and improve surface processing uniformity.

[0023] 3. Flexible transmission and equipment protection function: The synchronous belt drive system between the second motor and the grinding shaft has both power transmission and overload slip protection functions, reducing the impact of vibration transmission on the motor; the elastic pre-load contact design of the guide wheel can adaptively compensate for the thermal deformation of the grinding shaft, reduce mechanical stress concentration, and extend the service life of bearings and transmission components.

[0024] 4. Efficient drive and enhanced process adaptability: The right-angle transmission structure of the angular reducer optimizes the spatial layout and realizes efficient conversion of the driving motor power; the rack and pinion transmission cooperates with the guide rail to support large-stroke, high-load axial feed grinding operations, adapt to different pipe diameters and processing speed requirements, and improve continuous automated production efficiency.

[0025] 5. Maintenance cost and safety optimization: The modular combination design of segmented rigid support (left / right bracket, vertical frame) and flexible compensation mechanism (elastic limit of guide wheel, overload protection of synchronous belt) reduces the wear rate of key components; the open structure facilitates quick maintenance and component replacement, reducing downtime, and at the same time, the safety of equipment operation is guaranteed through the linkage control of mechanical limit and electrical overload.

[0026] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show a certain embodiment of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of the right bracket of the present invention and a mechanism mounted on the right bracket; Figure 3 The present invention Figure 2Another perspective schematic diagram; Figure 4 is of the present invention Figure 3 Partial enlarged schematic diagram; Figure 5 is a schematic diagram of the left bracket of the present invention and the mechanism installed on the left bracket; Figure 6 is of the present invention Figure 1 Partial enlarged schematic diagram.

[0029] In the figure, 1 is the left bracket, 2 is the right bracket, 3 is the support roller, 4 is the grinding block, 5 is the moving seat, 6 is the grinding shaft, 7 is the vertical plate, 8 is the screw rod, 9 is the first motor, 10 is the driven gear, 11 is the driving gear, 12 is the cross plate, 13 is the guide rod, 14 is the tension wheel mounting seat, 15 is the tension gear, 16 is the support rod, 17 is the downward pressing air cylinder, 18 is the pressure wheel frame, 19 is the pressure wheel, 20 is the driving motor, 21 is the angle reducer, 22 is the grinding motor bracket, 23 is the second motor, 24 is the vertical frame, 25 is the guide wheel. Specific embodiments

[0030] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0031] See Figure 1 、 Figure 2 and Figure 5 , when this aluminum alloy pipe forming and grinding device works, first place the aluminum alloy pipe horizontally between the left bracket 1 and the right bracket 2. The two groups of coaxial support rollers 3 of the rotating part clamp the outer wall of the pipe and drive it to rotate around the axis. The grinding blocks 4 covering the surface of the support rollers 3 simultaneously grind the outer surface of the pipe; at the same time, the moving seat 5 of the inner grinding part advances along the guide rail of the left bracket 1, driving the grinding shaft 6 to drive the high-speed rotating grinding head to axially extend into the inner cavity of the pipe, and realizing the finish machining of the inner surface through the contact friction between the grinding head and the inner wall of the pipe. The parallel layout of the double brackets ensures the positioning stability of the pipe. The support rollers 3 integrate the grinding function to complete the rotation drive and the outer surface processing synchronously. The linear feeding control of the moving seat 5 accurately matches the axial stroke of the grinding head. The internal and external coordinated grinding process significantly improves the operation efficiency; the composite control of the rotary motion of the grinding shaft 6 and the linear motion of the moving seat 5 can adapt to different pipe diameters and lengths. The support rollers 3 and the grinding head simultaneously remove the allowances on the inner and outer surfaces, avoiding the secondary clamping error and ensuring the machining concentricity and surface consistency. The overall structure has strong rigidity and clear motion logic, which is conducive to automated continuous production and reduces the equipment operation and maintenance complexity.

[0032] See Figure 2 and Figure 3, place the aluminum alloy pipe horizontally above the slide rail of the right support 2. By adjusting the slider at the bottom of the bearing block to slide along the slide rail, drive the support roller 3 to move horizontally to the predetermined clamping position under the constraint of the shaft and the bearing block. Then drive the support roller 3 to rotate and use the grinding block 4 on its surface to perform circumferential friction grinding on the outer wall of the pipe. The sliding fit design of the slide rail and the slider enables the distance between the support rollers 3 to be flexibly adjusted according to the pipe diameter. The shaft and the bearing block ensure the rotation stability of the support roller 3. Combining the slider locking function realizes the integrated operation of pipe clamping and rotation drive. The slide rail-slider mechanism provides high-precision linear guidance and rigid support. The self-adaptive adjustment ability of the distance between the support rollers 3 expands the pipe diameter compatibility range. The synergistic effect of the bearing block and the shaft reduces the rotational friction loss and suppresses vibration. The modular design of the slide rail and the slider simplifies the maintenance process. The overall structure improves the versatility and service life of the equipment while ensuring the grinding accuracy.

[0033] See Figure 2 , place the aluminum alloy pipe horizontally between the two groups of support rollers 3 of the right support 2. Drive the screw 8 to screw into the nut sleeve on the vertical plate 7 by rotating the rotating disk of the rotation tightening mechanism, and push the top end of the screw 8 to abut against the bearing block of the support roller 3. Apply the tightening force symmetrically on both sides to force the support roller 3 to move horizontally along the slide rail until the grinding block 4 fits the outer wall of the pipe to complete the clamping and fixing. Then drive the support roller 3 to rotate to drive the pipe to rotate around its axis, and simultaneously start the moving seat 5 of the inner grinding part to push the grinding head to feed axially to achieve synchronous grinding of the inner and outer surfaces. The rotation tightening mechanism provides a controllable clamping force through the precise screw drive of the screw 8 and the nut sleeve. The synchronous pressing on both sides ensures the centering positioning of the pipe axis. The manual operation of the rotating disk simplifies the adjustment process and does not require additional power. The rigid combination of the vertical plate 7 and the screw 8 enhances the lateral bending resistance ability and avoids the displacement deviation of the support roller 3. The self-locking characteristic of the nut sleeve thread maintains the stability of the clamping state. Combining the slide rail guidance of the support roller 3 realizes the pipe diameter self-adaptive adjustment and high-precision centering. The overall structure takes into account the operation convenience and clamping reliability, and reduces the risk of axial crosstalk during pipe rotation and grinding.

[0034] See Figure 4, the aluminum alloy pipe is placed horizontally between the two groups of support rollers 3 of the right bracket 2, and the driving gear 11 of the first motor 9 driving the output shaft is started to synchronously drive the driven gears 10 on the two support rollers 3 to rotate through the chain, so that the two groups of support rollers 3 rotate at the same speed and use the surface grinding block 4 to rub the outer wall of the pipe to drive it to rotate around the axis. At the same time, the moving seat 5 of the inner grinding part pushes the grinding shaft 6 to drive the grinding head to axially feed into the inner cavity of the pipe to achieve synchronous grinding of the inner and outer surfaces. The first motor 9 drives the double support rollers 3 to rotate synchronously through the chain transmission. The gear chain meshing transmission power is stable and the torque distribution is uniform, ensuring the consistency of the rotation axis of the pipe; the modular design of the driven gear 10 and the driving gear 11 simplifies the transmission layout, and the chain tensioning adjustment function is adapted to the grinding resistance requirements of different pipes. The middle support plate is integrated with the motor installation to enhance the structural rigidity and avoid the influence of transmission vibration on the grinding accuracy. The direct linkage between the support roller 3 and the motor drive improves the rotation stability and speed regulation response efficiency, and has the characteristics of high synchronization, low maintenance cost and long life.

[0035] See also Figure 4 , the chain is wrapped around the driving gear 11 and the driven gear 10 and then inserted into the surface of the tension gear 15. During the chain tensioning process, the spring is squeezed and contracted by the retaining ring at the lower end of the guide rod 13, pushing the tension wheel mounting seat 14 to slide adaptively along the axis of the guide rod 13, and the chain is pushed outward by the tension gear 15 to form a constant tension meshing state; when the chain is loose due to wear or load changes, or when the relative position between the support rollers 3 is adjusted as needed, the spring releases its elastic force to lift the guide rod 13, driving the tension gear 15 to move in the opposite direction to tighten the chain, dynamically compensating for changes in chain length, and ensuring that the gear chain meshes The closing tightness is constant, and the elastic floating mechanism formed by the guide rod 13 and the spring realizes automatic compensation of the chain tension. The sliding trajectory of the tension gear 15 is linearly constrained by the guide rod 13 to avoid deflection and failure during the tensioning process; the cross plate 12 fixes the guide rod 13 to form a stable guide reference, the spring preload is adjustable to adapt to different chain specifications, and the retaining ring limiter prevents the guide rod 13 from separating from the cross plate 12. The tension gear 15 is flexibly connected to the shaft of the mounting seat 14 to reduce friction resistance. The overall structure maintains the stability of the transmission system through passive elastic tensioning, reduces the risk of chain tooth jumping and prolongs its service life.

[0036] See also Figure 3 and Figure 6, place the aluminum alloy pipe horizontally on the support roller 3 of the right bracket 2. Start the downward pressure cylinder 17 to drive the telescopic rod to extend downward, driving the arc-shaped pressure wheel frame 18 to rotate around the axis, so that the two end pressure wheels 19 synchronously press vertically down to the top arc surface of the pipe. The outer wall of the pipe is wrapped by the rolling contact of the pressure wheels 19. Cooperate with the rotation of the support roller 3 to drive the pipe to rotate self-adaptively, forming a dual fixation of axial constraint and radial pressure; when the pipe has a slight jump due to grinding vibration, the arc structure of the pressure wheel frame 18 and the follow-up rotation of the pressure wheel 19 adaptively adjust the contact angle. The downward pressure cylinder 17 continuously outputs a constant pressure to suppress the lifting of the pipe, ensuring the rotation stability of the pipe when the inner and outer grinding heads operate synchronously. The cantilever design of the "L"-shaped support rod 16 expands the cylinder installation space and enhances the anti-torsion rigidity. The linear drive of the downward pressure cylinder 17 combined with the arc trajectory of the pressure wheel frame 18 optimizes the pressure distribution. The double-point rolling contact of the pressure wheel 19 reduces the risk of scratching the pipe surface. The shaft movable connection design allows the pressure wheel 19 to dynamically fit the arc surface of different pipe diameters. The adjustable cylinder pressure adapts to various grinding conditions. Overall, it forms a synergistic effect of flexible pressurization and rigid positioning, effectively eliminating the radial runout and axial yaw when the pipe rotates at high speed, and improving the accuracy consistency of synchronous grinding of the inner and outer surfaces.

[0037] See Figure 5 , when the device starts, the drive motor 20 reduces the speed and increases the torque through the angle reducer 21, driving the translation gear to rotate around the axis. The translation gear meshes with the rack fixed on the left bracket 1 to generate a linear driving force, pushing the moving seat 5 to translate precisely along the guide rail. The cooperation between the guide rail and the slider restricts the moving direction and reduces the frictional resistance; when the device needs to adjust the working position, the drive motor 20 switches between forward and reverse rotations, and through the reverse transmission of the gear-rack meshing, the moving seat 5 can slide bidirectionally and controllably on the guide rail. The worm and gear structure of the angle reducer 21 has a self-locking characteristic, ensuring that there is no inertial drift when the moving seat 5 is stationary. The high-rigidity guiding system of the guide rail and the slider guarantees the linear accuracy of the moving trajectory. The gear-rack meshing transmission provides a large thrust and long stroke capacity. The angle reducer 21 realizes the vertical steering of the power and integrates the function of reducing speed and increasing torque. The module number of the translation gear matches the rack parameters to optimize the transmission smoothness. The direct motor connection structure simplifies the transmission chain and improves the response speed. The integrated layout of the moving seat 5 reduces the space occupation. Overall, it forms a high-precision, closed-loop controllable linear drive module, which is suitable for heavy-load high-frequency reciprocating motion scenarios and has low maintenance costs.

[0038] See Figure 5, the second motor 23 drives the grinding shaft 6 to rotate at high speed through a pulley and a belt. The moving seat 5 translates along the guide rail to drive the axial feed of the grinding shaft 6. The guide wheels 25 symmetrically arranged up and down in the vertical frame 24 are dynamically attached to the outer ring of the grinding shaft 6 through the concave arc surface, forming a three-point positioning constraint to suppress the radial runout of the grinding shaft rotation. When the grinding shaft 6 needs to be replaced for processing pipes of different diameters, the up-and-down adjustment function of the shaft of the guide wheel 25 adapts to the change of the shaft diameter. The elastic characteristics of the belt drive buffer the vibration transmission between the motor and the grinding shaft 6. The bearing seat support ensures the concentric rotation of the grinding shaft 6. The linkage between the moving seat 5 and the left bracket 1 realizes the closed-loop control of the axial position of the grinding shaft 6. The belt drive system has both overload protection and speed matching capabilities. The V-shaped layout of the double guide wheels 25 enhances the radial stability of the grinding shaft 6. The frame structure of the vertical frame 24 provides high-rigidity support to resist bending deformation. The concave arc surface of the guide wheel 25 increases the contact area and reduces local wear. The independent bearing seat design of the grinding shaft 6 simplifies the coaxiality adjustment process. The integrated drive of the moving seat 5 realizes the coordinated control of the grinding feed and the rotation of the shaft system. The overall structure achieves sub-micron-level radial runout accuracy under high-speed rotation conditions, adapting to the process requirements of synchronous polishing of the inner and outer walls of ultra-precision pipes.

[0039] The working principle of the present invention is as follows: First, place the pipe on the support roller 3 of the right bracket 2, start the pressing cylinder 17 to drive the pressing wheel 19 to press down and wrap the outer wall of the pipe, and cooperate with the support roller 3 to drive the pipe to rotate uniformly. The driving motor 20 of the left bracket 1 drives the moving seat 5 to translate along the guide rail through the angle reducer 21 and the gear-rack meshing, driving the axial feed of the grinding shaft 6 to the processing position. The second motor 23 drives the grinding shaft 6 to rotate at high speed through the belt drive. The double guide wheels 25 in the vertical frame 24 dynamically constrain the radial runout of the grinding shaft 6 through the concave arc, and the bearing seat support ensures concentric rotation. During the grinding process, the two-way clamping formed by the pressing wheel 19 and the support roller 3 suppresses the vibration of the pipe. The closed-loop control of the moving seat 5 realizes the axial synchronization of the rotation of the grinding shaft 6 and the pipe. The adaptive adjustment of the guide wheel 25 maintains the radial stability of the grinding shaft 6, and finally completes the high-precision synchronous polishing of the inner and outer walls of the pipe. This system integrates five major modules: precise guidance of the guide rail slider, strong propulsion of the gear-rack, dynamic clamping of the flexible pressing wheel, radial constraint of the three-point guide wheel, and vibration damping of the belt drive. It comprehensively has sub-micron-level radial control ability, high-frequency heavy-load axial drive efficiency, adaptability to rapid changeover of multi-specification pipes, and vibration energy dissipation characteristics, meeting the requirements of high rigidity, high dynamic response, and low maintenance cost in the ultra-precision pipe processing scenario.

[0040] The following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. The terms such as "upper", "lower", "left", and "right" are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change; Second, in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally, the above description is only the preferred embodiment of the present invention and is not used to limit the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A grinding device for an aluminum alloy pipe after forming, comprising a left bracket (1) and a right bracket (2) arranged parallel and at the same height as the left bracket (1), characterized in that: The left bracket (1) is provided with an inner grinding part that can move back and forth in depth, and the right bracket (2) is provided with a rotating part that can drive the pipe to rotate; The rotating part includes two groups of supporting rollers (3) coaxially arranged on the right bracket (2), and the surface of the supporting rollers (3) is covered with a plurality of grinding blocks (4) for grinding; The inner grinding part includes a moving seat (5) arranged on the left bracket (1) that can move forward and backward, a rotatable grinding shaft (6) is fixed on the moving seat (5), and a grinding head is fixed at the end of the grinding shaft (6).

2. The grinding device for the formed aluminum alloy pipe according to claim 1, characterized in that: Both ends of the supporting roller (3) are installed in the bearing seat through shafts, and the bottom of the bearing seat is matched with the slide rail installed on the right bracket (2) through a slider.

3. A grinding device for an aluminum alloy pipe after forming according to claim 2, characterized in that: Tightening mechanisms for pressing against the side wall of the pipe are fixed on both sides of the middle part of the right bracket (2); Each tightening mechanism includes a vertical plate (7) fixed to the right bracket (2), a screw sleeve is provided on the vertical plate (7), a screw (8) is screwed into the screw sleeve, the top end of the screw (8) abuts against the bearing seat for installing the supporting roller (3), and a rotating disc is installed at the tail end of the screw (8).

4. A grinding device for an aluminum alloy pipe after forming according to any one of claims 1-3, characterized in that: A first motor (9) is installed on the middle support plate of the right bracket (2), driven gears (10) are fixed on the two supporting rollers (3), a driving gear (11) is installed on the output shaft of the first motor (9), and the driven gear (10) and the driving gear (11) are driven by a chain.

5. The grinding device for an aluminum alloy pipe after forming according to claim 4, characterized in that: A cross plate (12) is fixed below the middle part of the right bracket (2), there is a through hole at the end of the cross plate (12), a guide rod (13) passes through the through hole, a tension wheel mounting seat (14) is fixed at the upper end of the guide rod (13), a tension gear (15) is movably installed in the tension wheel mounting seat (14) through a shaft, the chain bypasses the tension gear (15), there is an outward protruding retaining ring at the lower end of the guide rod (13), and a spring is installed between the retaining ring and the bottom of the cross plate (12).

6. The grinding device for an aluminum alloy pipe after forming according to claim 1, wherein: A plurality of "L"-shaped support rods (16) are fixed on one side of the right bracket (2), a pressing cylinder (17) is fixed at the top end of the support rod (16), the telescopic rod of the pressing cylinder (17) is movably installed through a shaft with a pressing wheel frame (18), the pressing wheel frame (18) is arc-shaped, and pressing wheels (19) are installed at both ends through shafts.

7. A grinding device for an aluminum alloy pipe after forming according to claim 1, characterized in that: There are two parallel guide rails on the upper surface of the left bracket (1), the slider at the bottom of the moving seat (5) is matched with the guide rail, a driving motor (20) is installed on one side of the moving seat (5), the driving motor (20) is connected with a bevel reducer (21), the output shaft of the bevel reducer (21) passes through the bottom plate of the moving seat (5) and then a translation gear is installed, and the translation gear meshes with the rack fixed on the left bracket (1).

8. A grinding device for an aluminum alloy pipe after forming according to claim 1 or 7, characterized in that: There is a grinding motor bracket (22) in the middle of the moving seat (5), a second motor (23) is fixed at the top end of the grinding motor bracket (22), the output shaft of the second motor (23) and the tail end of the grinding shaft (6) are driven by a pulley and a belt, the grinding shaft (6) is movably installed between the bottom plate of the moving seat (5) through a bearing seat, a frame-shaped vertical frame (24) is fixed at the end of the left bracket (1) through bolts, and two guide wheels (25) with the same structure are arranged up and down through shafts in the vertical frame (24), the middle of the guide wheel (25) is concave in an arc shape and fits with the outer ring of the grinding shaft (6).

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