Elastic self-adaptive axial clamping aluminum pipe inner wall polishing equipment

Abstract

The invention relates to the technical field of aluminum pipe machining, in particular to aluminum pipe inner wall polishing equipment with an elastic self-adaptive axial clamping function. The self-adaptive clamping mechanism comprises a hollow main shaft, an elastic floating assembly and a driving assembly, the hollow main shaft is provided with an annular groove and a guide groove, and the elastic floating assembly comprises a first annular base connected to the annular groove through a first pre-pressing spring and a second annular base connected to the top of the main shaft through a second pre-pressing spring. A plurality of adjustable connecting rod sets are hinged between the first annular base and the second annular base, the driving assembly comprises a push rod arranged in the cavity of the main shaft in a sliding mode, the lower end of the push rod is connected with a linear driver, and the upper end of the push rod is connected with a sliding block located in the guide groove to form displacement coupling with the second annular base. And the rotary polishing assembly can stretch into the aluminum pipe for polishing. The problems that in the aluminum pipe polishing process, due to the fact that a radial clamp is used, clamping force is not uniform, and dynamic adjustment of the clamping force is difficult can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum tube processing, and in particular to an aluminum tube inner wall polishing device with elastic self-adaptive axial clamping. Background Art

[0002] Polishing the inner wall of aluminum tubes is a key surface treatment technology, mainly used in fields such as refrigeration, automobiles, aerospace, etc. that have high requirements for pipeline performance. Since aluminum tubes are prone to burrs, oxide layers and microscopic unevenness during processing, polishing the inner wall of aluminum tubes can improve surface finish by removing burrs, oxide layers and microscopic defects, which is crucial to fluid transmission efficiency and system reliability. The polished inner wall of the aluminum tube can reduce the internal fluid resistance by 15%-20%, and at the same time, it can simultaneously optimize the sealing, corrosion resistance and life and reduce maintenance costs.

[0003] In the prior art, the internal polishing of industrial-grade heat dissipation aluminum tubes usually uses mechanical polishing. The rotating grinding head contacts and rubs against the inner wall of the aluminum tube to remove burrs, oxide layers and rough surface protrusions, and a surface finish of less than Ra0.4μm can be achieved. Traditional clamps usually apply radial pressure to the aluminum tube, and the clamping force cannot be adjusted adaptively. Local stress concentration will occur at the part where the clamp is in direct contact with the aluminum tube, resulting in indentations or mechanical scratches on the tube wall surface. For thin-walled aluminum tubes, traditional clamps clamp radially. Once the clamping force is improperly controlled, excessive tightening can easily cause distortion of the cross-sectional shape. At the same time, additional mechanical stress is introduced. If it is not completely released after polishing, the aluminum tube may warp or crack due to uneven stress in subsequent use; if it is too loose, it will not play a clamping role. The excessive constraint of the traditional clamp on the freedom of the tube body suppresses the necessary micro-vibration during the polishing process, causing uneven distribution of contact pressure between the polishing head and the inner wall, forming periodic polishing lines, and affecting surface uniformity. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The invention provides an aluminum tube inner wall polishing device with elastic self-adaptive axial clamping, aiming to solve the problems of uneven clamping force and difficulty in dynamic adjustment of the clamping force caused by using a radial clamp during the aluminum tube polishing process.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the present invention provides an elastic self-adaptive axial clamping aluminum tube inner wall polishing device, comprising:

[0008] A workbench with an axial mounting hole at the center of the table;

[0009] The adaptive clamping mechanism comprises a hollow main shaft, an elastic floating assembly and a driving assembly, wherein the hollow main shaft is coaxially assembled in the axial mounting hole, an annular groove and a guide groove are provided on the upper part of the outer wall, the elastic floating assembly comprises a first annular seat connected to the annular groove through a first pre-stressed spring and a second annular seat connected to the top of the main shaft through a second pre-stressed spring, a plurality of adjustable connecting rod groups are hinged between the first annular seat and the second annular seat for forming a radial telescopic clamping structure, the driving assembly comprises a push rod slidably arranged in the main shaft cavity, the lower end of the push rod is connected to a linear driver, and the upper end forms a displacement coupling with the second annular seat by connecting to a slider located in the guide groove;

[0010] When the push rod moves upward, it drives the second annular seat to compress the second pre-compression spring, triggering the adjustable connecting rod group to radially expand to form a clamping channel; when the push rod is reset, the second pre-compression spring drives the second annular seat downward, causing the adjustable connecting rod group to radially contract to form a self-centering locking structure of the aluminum tube;

[0011] The rotary polishing assembly is installed below the table and includes a polishing head that can extend into the interior of the aluminum tube clamped by the adaptive clamping mechanism.

[0012] Optionally, the upper surface of the workbench is provided with an annular groove matching the cross-sectional shape of the aluminum tube, and the annular groove is arranged concentrically with the axial mounting hole, and is used to cooperate with the adaptive clamping mechanism to position and clamp the two ends of the aluminum tube;

[0013] The annular groove is nitrided, has chamfered edges, and has a liner at the bottom.

[0014] Optionally, the adjustable connecting rod assembly includes a first connecting rod and a second connecting rod;

[0015] The first annular seat is formed by butting two first semi-annular seats, and a plurality of first hinge points are distributed circumferentially on the edge; correspondingly, the second annular seat is formed by butting two second semi-annular seats, and a plurality of second hinge points are distributed circumferentially on the edge;

[0016] One end of the first connecting rod is hinged to the first annular seat at a first hinge point;

[0017] One end of the second connecting rod is hinged to the second annular seat at a second hinge point;

[0018] The free ends of the first connecting rod and the second connecting rod are rotatably connected to form a third hinge point;

[0019] A clamping groove is arranged on the side of the first connecting rod contacting the aluminum tube.

[0020] Optionally, the rotary polishing assembly includes a first power device, a rotary support assembly, a polishing assembly and a second power device;

[0021] The rotating bracket assembly includes a connecting seat, a gear ring, and a rotating bracket;

[0022] The gear ring is inserted into the connecting seat and can form a rotational connection with the flange at the bottom of the connecting seat. The connecting seat is coaxially installed below the mounting hole and fixed to the workbench. The first power device is fixedly installed below the table top of the workbench and is connected to the gear ring through gear transmission or worm gear transmission, thereby driving the gear ring to rotate. The rotating frame is fixedly installed below the gear ring, and the through hole in the center of the rotating frame is coaxially arranged with the main shaft;

[0023] The rotating frame is provided with a slide groove, in which the polishing assembly is slidably installed. The second power device is fixedly installed on one side of the rotating frame and connected to the polishing assembly through a threaded transmission mechanism, and can drive the polishing assembly to move radially in the slide groove.

[0024] Optionally, the gear ring has a stepped hole, the lower surface of the small hole of the stepped hole contacts the upper surface of the flange at the bottom of the connecting seat, and an annular slide rail is provided between the two.

[0025] Optionally, the polishing assembly includes a fixed seat, a driving motor arranged on the fixed seat, and a polishing head connected to an output end of the driving motor, wherein the polishing head is a polishing shaft, and a protrusion made of cemented carbide is arranged on the polishing shaft;

[0026] Along the length direction of the slide slot, a limit guide rod is fixed on the rotating frame, and a sliding hole is arranged on the fixed seat corresponding to the limit guide rod, and the sliding hole and the limit guide rod are slidably matched.

[0027] Optionally, an auxiliary frame is also included;

[0028] The auxiliary frame includes a coaxially arranged circular ring, a first circular plate, and a second circular plate, wherein the circular ring is fixedly installed below the table surface of the workbench, the first circular plate is connected to the circular ring through a connecting plate, and the second circular plate is connected to the first circular plate through the connecting plate;

[0029] The main shaft passes through the centers of the first circular plate and the second circular plate in sequence to open an axial fixing hole, and is interference fit with the fixing hole. The linear drive is fixedly mounted on the bottom of the second circular plate.

[0030] Optionally, a spiral coolant channel is provided inside the polishing shaft, one end of the channel is connected to an external high-pressure coolant pump through a rotating joint, and the other end extends to the root of the polishing head protrusion and is provided with a fan-shaped nozzle; an annular liquid collecting tank is embedded in the through hole of the rotating frame, and a reflux hole is opened at the bottom of the tank to connect to the waste liquid recovery pipe, forming a coolant circulation system.

[0031] Optionally, the bottom is connected to the first circular plate via a plurality of sets of height-adjustable screw structures, so as to adjust the heights of the first circular plate and the second circular plate.

[0032] Optionally, a motor control system and an air source system are also included.

[0033] (III) Beneficial effects

[0034] The adaptive clamping mechanism in the device of the present invention realizes flexible clamping of the aluminum tube by setting an elastic floating component and a driving component, effectively eliminating the scratches or indentations on the side wall of the aluminum tube caused by rigid clamping, and at the same time preventing the damage to the aluminum tube caused by the inability to dynamically adjust the clamping force during the polishing process. The adaptive clamping mechanism adopts an axial clamping clamping method, which can provide a greater clamping force without causing obvious deformation of the aluminum tube compared to radial clamping, and is more suitable for polishing and clamping of thin-walled aluminum tubes. In addition, the flexible clamping mechanism can meet the clamping requirements of aluminum tubes with varying lengths within a certain range by setting a first pre-stressed spring, thereby improving the versatility of the equipment. Multiple groups of adjustable connecting rod groups are evenly distributed between the annular seats in a hinged manner to form a symmetrical radial telescopic structure. The clamping force is evenly distributed along the circumference of the aluminum tube to prevent local deformation or slipping.

[0035] The push rod forms a displacement coupling with the second annular seat through the slider in the guide groove, converting the linear motion of the linear drive into the radial expansion and contraction of the clamping structure, with precise movement to ensure the synchronization of clamping opening and closing and locking. The linear drive of the linear drive is fast, significantly improving work efficiency.

[0036] The rotating polishing assembly extends the polishing head into the clamped aluminum tube for polishing, thereby integrating clamping and polishing and reducing the reduction in production efficiency caused by secondary positioning.

[0037] The hollow spindle integrates the clamping mechanism and the push rod channel, and the workbench is designed in upper and lower layers, with high space utilization and small equipment footprint. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the aluminum tube inner wall polishing equipment with elastic adaptive axial clamping;

[0039] Figure 2 A schematic diagram of the main structure of the adaptive clamping mechanism of the aluminum tube inner wall polishing device with elastic adaptive axial clamping;

[0040] Figure 3 for Figure 2 A cross-sectional view of

[0041] Figure 4 A schematic diagram of the connection structure of the rotary polishing assembly and the workbench of the aluminum tube inner wall polishing equipment with elastic adaptive axial clamping;

[0042] Figure 5 A cross-sectional view of a rotary polishing assembly of an aluminum tube inner wall polishing device with elastic adaptive axial clamping;

[0043] Figure 6 This is a schematic diagram of the structure of the workbench.

[0044] [Description of Reference Numerals]

[0045] 1: workbench; 11: annular groove; 2: adaptive clamping mechanism; 21: hollow spindle; 211: annular groove; 212: guide groove; 22: elastic floating assembly; 221: first preload spring; 222: first annular seat; 223: second preload spring; 224: second annular seat; 225: adjustable connecting rod assembly; 2251: first connecting rod; 2252: second connecting rod; 23: driving assembly; 231: push rod; 232 : Linear drive; 3: Rotary polishing assembly; 31: First power device; 32: Rotary bracket assembly; 321: Connecting seat; 322: Gear ring; 323: Rotary frame; 3231: Slide; 33: Polishing assembly; 331: Fixed seat; 332: Driving motor; 333: Polishing head; 34: Second power device; 4: Slider; 5: Auxiliary frame; 51: Ring; 52: First circular plate; 53: Second circular plate; 6: Aluminum tube. DETAILED DESCRIPTION

[0046] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0047] This embodiment provides an elastic self-adaptive axial clamping aluminum tube inner wall polishing device, such as Figure 1-Figure 6 As shown, it comprises: a workbench 1, an axial mounting hole is arranged at the center of the table surface. An adaptive clamping mechanism 2 comprises a hollow spindle 21, an elastic floating assembly 22 and a driving assembly 23. The hollow spindle 21 is coaxially assembled in the mounting hole, and an annular groove 211 and a guide groove 212 are arranged on the upper part of the outer wall. The elastic floating assembly 22 comprises a first annular seat 222 connected to the annular groove 211 through a first pre-compression spring 221 and a second annular seat 224 connected to the top of the spindle through a second pre-compression spring 223. A plurality of adjustable connecting rod groups 225 are hinged between the first annular seat 222 and the second annular seat 224 to form an axial telescopic clamping structure. The driving assembly 23 comprises a push rod 231 slidably arranged in the spindle cavity, the lower end of the push rod 231 is connected to a linear driver 232, and the upper end is connected to a slider 4 located in the guide groove 212 to form a displacement coupling with the second annular seat 224.

[0048] When the push rod 231 moves upward, it drives the second annular seat 224 to compress the second pre-compression spring 223, triggering the axial stretching of the adjustable connecting rod group 225 to form a clamping channel; when the push rod 231 is reset, the second pre-compression spring 223 drives the second annular seat 224 downward, causing the adjustable connecting rod group 225 to axially contract to form a self-centering locking structure of the aluminum tube 6.

[0049] The rotary polishing assembly 3 is installed below the table, and includes a rotary polishing head 333 that can extend into the interior of the aluminum tube 6 clamped by the adaptive clamping mechanism 2 .

[0050] It should be noted in the above example that the axial mounting hole of the table can be set to a corresponding size according to the aluminum tube 6 of different specifications and models, and the specifications and models here particularly refer to the diameter of the aluminum tube 6. The annular groove 211 and the guide groove 212 are both set at the top of the hollow main shaft 21. Specifically, the guide groove 212 is closer to the top of the main shaft than the annular groove 211. The second annular seat 224 is located at the guide groove 212, and the first annular seat 222 is located at the annular groove 211. The overall position relationship is that the main shaft is sequentially arranged from top to bottom with the second pre-compression spring 223, the second annular seat 224, the first annular seat 222 and the first pre-compression spring 221. The lower end of the push rod 231 is connected to a linear driver 232, and the upper end is connected to the slider 4 located in the guide groove 212 to form a displacement coupling with the second annular seat 224. The displacement coupling here specifically refers to the slider 4 sliding in the guide groove 212 under the push of the push rod 231, and the part of the slider 4 protruding from the slide groove 3231 will push the second annular seat 224 to move upward, forming a state in which the push rod 231 and the second annular seat 224 move in a synchronous relationship.

[0051] The adaptive clamping mechanism 2 in this embodiment realizes flexible clamping of the aluminum tube 6 by setting an elastic floating component 22 and a driving component 23, effectively eliminating the scratches or indentations on the side wall of the aluminum tube 6 caused by rigid clamping, and at the same time preventing the damage to the aluminum tube 6 caused by the inability to dynamically adjust the clamping force during the polishing process. The adaptive clamping mechanism 2 adopts an axial clamping clamping method, which can provide a greater clamping force without causing obvious deformation of the aluminum tube 6 compared to radial clamping, and is more suitable for polishing and clamping of thin-walled aluminum tubes 6. In addition, the flexible clamping mechanism can meet the clamping of aluminum tubes 6 with a certain length range by setting a first pre-stressed spring 221, thereby improving the versatility of the equipment. Multiple groups of adjustable connecting rod groups are evenly distributed between the annular seats in a hinged manner to form a symmetrical radial telescopic structure. The clamping force is evenly distributed along the circumference of the aluminum tube 6 to prevent local deformation or slipping.

[0052] The push rod 231 forms a displacement coupling with the second annular seat 224 through the slider 4 in the guide groove 212, converting the linear motion of the linear driver 232 into radial expansion and contraction of the clamping structure, with precise movement to ensure the synchronization of clamping opening and closing and locking. The linear drive of the linear driver 232 is fast, significantly improving work efficiency.

[0053] The rotating polishing assembly 3 extends the polishing head 333 into the clamped aluminum tube 6 for polishing, thereby integrating clamping and polishing and reducing the reduction in production efficiency caused by secondary positioning.

[0054] The hollow main shaft 21 integrates the clamping mechanism and the push rod 231 channel, and the workbench 1 is designed in upper and lower layers, with high space utilization and small equipment footprint.

[0055] In this embodiment, the upper surface of the workbench 1 is provided with an annular groove 11 matching the cross-sectional shape of the aluminum tube 6, and the annular groove 11 is arranged concentrically with the axial mounting hole, and is used to cooperate with the adaptive clamping mechanism 2 to position and clamp the two ends of the aluminum tube 6. Specifically, after the aluminum tube 6 is inserted from the top of the adaptive clamping mechanism 2, the bottom is clamped into the annular groove 11 on the upper surface of the workbench 1, which plays a role of radial limiting the bottom end of the aluminum tube 6, and cooperates with the adjustable connecting rod group 225 to press the aluminum tube 6 from the top to achieve accurate positioning and clamping of the aluminum tube 6.

[0056] The annular groove 11 is nitrided, the edges are chamfered, and a gasket is provided at the bottom. The cross-sectional shape of the annular groove 11 is U-shaped, and after nitriding, the wear resistance can be significantly improved. The edges are rounded to facilitate the insertion of the aluminum tube 6 and quick positioning. A gasket is provided at the bottom, and the thickness of the gasket is 2mm, which can reduce the impact when the aluminum tube 6 enters the annular groove 11.

[0057] In this embodiment, the adjustable connecting rod group 225 includes a first connecting rod 2251 and a second connecting rod 2252. The first annular seat 222 is formed by two first semi-annular seats being connected, and a plurality of first hinge points are distributed circumferentially on the edge. Correspondingly, the second annular seat 224 is formed by two second semi-annular seats being connected, and a plurality of second hinge points are distributed circumferentially on the edge. One end of the first connecting rod 2251 is hinged to the first annular seat 222 at a first hinge point; one end of the second connecting rod 2252 is hinged to the second annular seat 224 at a second hinge point; the free ends of the first connecting rod 2251 and the second connecting rod 2252 are rotatably connected to form a third hinge point. A card slot is provided on the side of the first connecting rod 2251 that contacts the aluminum tube 6. Specifically, the first connecting rod 2251 and the second connecting rod 2252 are made of aluminum alloy or titanium alloy, which has good wear resistance and can reduce the overall weight. Self-lubricating bearings or pins are used at the hinge points. A slot is provided on the side of the first connecting rod 2251 that contacts the aluminum tube 6, and the slot can limit the top of the aluminum tube 6 to prevent the top from moving in the radial direction. Preferably, corresponding positions on the first annular seat 222 and the second annular seat 224 can start guide holes, through which a guide rod fixed to the main shaft passes, so that the first annular seat 222 and the second annular seat 224 will not rotate relative to each other along the axial direction, thereby applying excessive external force to the adjustable connecting rod group 225, thereby extending the service life of the adjustable connecting rod group 225.

[0058] In this embodiment, the rotary polishing assembly 3 includes a first power device 31, a rotary support assembly 32, a polishing assembly 33 and a second power device 34. The rotary support assembly 32 includes a connecting seat 321, a gear ring 322 and a rotating frame 323. The gear ring 322 is inserted into the connecting seat 321 and can form a rotational connection with the flange at the bottom of the connecting seat 321. The connecting seat 321 is coaxially installed below the mounting hole and fixed to the workbench 1; the first power device 31 is fixedly installed below the table surface of the workbench 1, and is connected to the gear ring 322 through gear transmission or worm gear transmission, thereby driving the gear ring 322 to rotate. A rotating frame 323 is fixedly installed below the gear ring 322, and the through hole in the center of the rotating frame 323 is coaxially arranged with the main shaft.

[0059] The rotating frame 323 is provided with a slide groove 3231 in which the polishing assembly 33 is slidably installed. The second power device 34 is fixedly installed on one side of the rotating frame 323 and is connected to the polishing assembly 33 through a threaded transmission mechanism, so as to drive the polishing assembly 33 to move radially in the slide groove 3231.

[0060] Furthermore, the gear ring 322 has a stepped hole, the lower surface of the small hole of the stepped hole contacts the upper surface of the flange at the bottom of the connecting seat 321, and an annular slide rail is provided between the two. Axial positioning is formed by the contact surface between the lower surface of the small hole and the upper surface of the flange of the connecting seat 321, and the sliding guide of the annular slide rail is used to ensure the precise coaxial rotation between the gear ring 322 and the connecting seat 321, and effectively reduce the rotational friction resistance. The slide rail can reduce component wear, while enhancing the radial load-bearing capacity of the gear ring 322 and suppressing the risk of eccentricity or deflection.

[0061] Furthermore, the polishing assembly 33 includes a fixed seat 331, a driving motor 332 disposed on the fixed seat 331, and a polishing head 333 connected to the output end of the driving motor 332. The polishing head 333 is a polishing shaft, and a protrusion made of a hard alloy is disposed on the polishing shaft. Along the length direction of the slide groove 3231, a limited guide rod is fixed on the rotating frame 323, and a sliding hole is disposed on the fixed seat 331 corresponding to the limited guide rod, and the sliding hole and the limited guide rod are slidably matched.

[0062] In this embodiment, the rotating polishing assembly 3 drives the gear ring 322 to rotate through gear transmission, which can also be in the form of a worm gear transmission, driving the coaxially arranged rotating frame 323 to rotate as a whole. At the same time, the second power device 34 controls the radial movement of the polishing assembly 33 along the slide groove 3231 through the threaded transmission mechanism to achieve multi-degree-of-freedom precision polishing. The high wear resistance of the cemented carbide polishing head 333 can extend the service life. The sliding cooperation between the limiting guide rod and the sliding hole effectively constrains the non-radial degrees of freedom of the polishing assembly 33, and combined with the high-precision feed of the threaded transmission, ensures that the polishing head 333 moves stably without deviation. The coaxial installation of the rotating frame 323 and the main shaft makes the polishing trajectory completely fit the inner wall of the aluminum tube 6, significantly improving the polishing uniformity and surface finish.

[0063] In this embodiment, an auxiliary frame 5 is also included; the auxiliary frame 5 includes a coaxially arranged circular ring 51, a first circular plate 52, and a second circular plate 53, wherein the circular ring 51 is fixedly installed below the table surface of the workbench 1, the first circular plate 52 is connected to the circular ring 51 through a connecting plate, and the second circular plate 53 is connected to the first circular plate 52 through a connecting plate. The main shaft passes through the center of the first circular plate 52 and the second circular plate 53 in sequence to open an axial fixing hole, and there is an interference fit between the main shaft and the fixing hole, and the bottom of the second circular plate 53 is fixedly installed with a linear drive 232, which is a cylinder.

[0064] In this embodiment, a spiral coolant channel is provided inside the polishing shaft, one end of the channel is connected to an external high-pressure coolant pump through a rotary joint, and the other end extends to the root of the protrusion of the polishing head 333 and is provided with a fan-shaped nozzle; an annular liquid collecting tank is embedded in the through hole of the rotating frame 323, and a reflux hole is provided at the bottom of the tank to connect the waste liquid recovery pipe, forming a coolant circulation system, realizing continuous cooling and debris flushing in the polishing area, and avoiding deformation of the inner wall of the aluminum tube 6 due to friction overheating. Specifically, through the spiral channel and fan-shaped nozzle inside the polishing shaft, the high-pressure coolant is uniformly sprayed to the inner wall of the aluminum tube 6 along the axial direction of the polishing shaft, significantly improving the heat dissipation efficiency of the polishing area, and effectively inhibiting the softening or oxidation of the aluminum material caused by the friction temperature rise. The spiral channel can enhance the turbulent flow effect of the coolant, and combined with the dynamic seal of the rotary joint, the coolant can be stably transported. The annular liquid collecting tank and the reflux hole form a cycle, and the waste liquid containing debris is recovered synchronously.

[0065] In this embodiment, the bottom of the ring 51 is connected to the first circular plate 52 through a plurality of sets of height-adjustable screw structures, which are used to adjust the height of the first circular plate 52 and the second circular plate 53. By adjusting the first circular plate 52 and the second circular plate 53, the height of the spindle above the table surface of the workbench 1 can be adjusted, so that the length range of the aluminum tube 6 that can be processed can be expanded.

[0066] In addition, the present embodiment also includes a motor control system and an air source system for controlling the drive motors 332 of all drive devices and providing corresponding air sources for the cylinders.

[0067] The specific working principle of the elastic self-adaptive axial clamping aluminum tube 6 inner wall polishing device provided in this embodiment is as follows:

[0068] After the equipment is ready, the heights of the first circular plate 52 and the second circular plate 53 are adjusted according to the specifications of the aluminum tube 6, so that the height of the spindle above the table surface of the workbench 1 can adapt to the length of the aluminum tube 6. At the same time, a polishing shaft of matching length is selected and installed on the output end of the drive motor 332 on the fixed seat 331 of the polishing assembly 33; then the cylinder is activated, and the slider 4 at the top of the push rod 231 is pushed upward in the guide groove 212 by the push rod 231. At this time, the part of the slider 4 protruding from the slide groove 3231 pushes The second annular seat 224 is driven to move upward, and the second preload spring 223 is compressed synchronously. When the cylinder reaches the preset stroke, the adjustable connecting rod group 225 is radially expanded to form a clamping channel. At this time, the aluminum tube 6 can be inserted from top to bottom until the bottom is inserted into the annular groove 11 on the table. At this time, the cylinder is manually held and returns to the initial position. The second preload spring 223 is reset and the second annular seat 224 is driven downward, so that the adjustable connecting rod group 225 is radially contracted to form a self-centering locking structure of the aluminum tube 6. At this time, the operator releases the aluminum tube 6. Then the polishing assembly 33 is started to rotate the polishing shaft. The second power device 34 of the rotating polishing assembly 3 is adjusted until the polishing shaft slightly touches the inner wall of the hotel; then the first power device 31 is started to start the polishing operation. During the process, the second power device 34 can be fine-tuned to control the radial movement of the polishing shaft. After the polishing is completed, the cylinder action is repeated, and the processed aluminum tube 6 can be removed.

[0069] It should be noted that all directional indications in this embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0070] In addition, in the present embodiment, the descriptions involving "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present embodiment, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In this embodiment, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0072] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. An elastic self-adaptive axial clamping aluminum tube inner wall polishing device, characterized in that: include: A workbench with an axial mounting hole at the center of the table; The adaptive clamping mechanism comprises a hollow main shaft, an elastic floating assembly and a driving assembly, wherein the hollow main shaft is coaxially assembled in the axial mounting hole, an annular groove and a guide groove are provided on the upper part of the outer wall, the elastic floating assembly comprises a first annular seat connected to the annular groove through a first pre-stressed spring and a second annular seat connected to the top of the main shaft through a second pre-stressed spring, a plurality of adjustable connecting rod groups are hinged between the first annular seat and the second annular seat for forming a radial telescopic clamping structure, the driving assembly comprises a push rod slidably arranged in the main shaft cavity, the lower end of the push rod is connected to a linear driver, and the upper end forms a displacement coupling with the second annular seat by connecting to a slider located in the guide groove; When the push rod moves upward, it drives the second annular seat to compress the second pre-compression spring, triggering the adjustable connecting rod group to radially expand to form a clamping channel; when the push rod is reset, the second pre-compression spring drives the second annular seat downward, causing the adjustable connecting rod group to radially contract to form a self-centering locking structure of the aluminum tube; The rotary polishing assembly is installed below the table and includes a polishing head that can extend into the interior of the aluminum tube clamped by the adaptive clamping mechanism.

2. The elastic adaptive axial clamping aluminum tube inner wall polishing device according to claim 1 is characterized in that: The upper surface of the workbench is provided with an annular groove matching the cross-sectional shape of the aluminum tube, and the annular groove is arranged concentrically with the axial mounting hole, and is used to cooperate with the adaptive clamping mechanism to position and clamp the two ends of the aluminum tube; The annular groove is nitrided, has chamfered edges, and has a liner at the bottom.

3. The elastic self-adaptive axial clamping aluminum tube inner wall polishing device according to claim 1 is characterized in that: The adjustable connecting rod assembly includes a first connecting rod and a second connecting rod; The first annular seat is formed by butting two first semi-annular seats, and a plurality of first hinge points are distributed circumferentially on the edge; correspondingly, the second annular seat is formed by butting two second semi-annular seats, and a plurality of second hinge points are distributed circumferentially on the edge; One end of the first connecting rod is hinged to the first annular seat at a first hinge point; One end of the second connecting rod is hinged to the second annular seat at a second hinge point; The free ends of the first connecting rod and the second connecting rod are rotatably connected to form a third hinge point; A clamping groove is arranged on the side of the first connecting rod contacting the aluminum tube.

4. The elastic self-adaptive axial clamping aluminum tube inner wall polishing device according to claim 1 is characterized in that: The rotary polishing assembly includes a first power device, a rotary support assembly, a polishing assembly, and a second power device; The rotating bracket assembly includes a connecting seat, a gear ring, and a rotating bracket; The gear ring is inserted into the connecting seat and can form a rotational connection with the flange at the bottom of the connecting seat. The connecting seat is coaxially installed below the mounting hole and fixed to the workbench. The first power device is fixedly installed below the table top of the workbench and is connected to the gear ring through gear transmission or worm gear transmission, thereby driving the gear ring to rotate. The rotating frame is fixedly installed below the gear ring, and the through hole in the center of the rotating frame is coaxially arranged with the main shaft; The rotating frame is provided with a slide groove, in which the polishing assembly is slidably installed. The second power device is fixedly installed on one side of the rotating frame and connected to the polishing assembly through a threaded transmission mechanism, and can drive the polishing assembly to move radially in the slide groove.

5. The elastic self-adaptive axial clamping aluminum tube inner wall polishing device according to claim 4 is characterized in that: The gear ring has a step hole, the lower surface of the small hole of the step hole contacts the upper surface of the flange at the bottom of the connecting seat, and an annular slide rail is arranged between the two.

6. The elastic self-adaptive axial clamping aluminum tube inner wall polishing device according to claim 4 is characterized in that: The polishing assembly includes a fixed seat, a driving motor arranged on the fixed seat, and a polishing head connected to the output end of the driving motor, wherein the polishing head is a polishing shaft, and a protrusion made of cemented carbide is arranged on the polishing shaft; Along the length direction of the slide slot, a limit guide rod is fixed on the rotating frame, and a sliding hole is arranged on the fixed seat corresponding to the limit guide rod, and the sliding hole and the limit guide rod are slidably matched.

7. The elastic self-adaptive axial clamping aluminum tube inner wall polishing device according to claim 1 is characterized in that: Also includes an auxiliary frame; The auxiliary frame includes a coaxially arranged circular ring, a first circular plate, and a second circular plate, wherein the circular ring is fixedly installed below the table surface of the workbench, the first circular plate is connected to the circular ring through a connecting plate, and the second circular plate is connected to the first circular plate through the connecting plate; The main shaft passes through the centers of the first circular plate and the second circular plate in sequence to open an axial fixing hole, and is interference fit with the fixing hole. The linear drive is fixedly mounted on the bottom of the second circular plate.

8. The elastic self-adaptive axial clamping aluminum tube inner wall polishing device according to claim 6 is characterized in that: A spiral coolant channel is provided inside the polishing shaft, one end of which is connected to an external high-pressure coolant pump through a rotating joint, and the other end extends to the root of the polishing head protrusion and is provided with a fan-shaped nozzle; an annular liquid collecting tank is embedded in the through hole of the rotating frame, and a reflux hole is opened at the bottom of the tank to connect to the waste liquid recovery pipe, forming a coolant circulation system.

9. The elastic self-adaptive axial clamping aluminum tube inner wall polishing device according to claim 7 is characterized in that: The bottom is connected to the first circular plate through a plurality of sets of height-adjustable screw structures, and is used to adjust the height of the first circular plate and the second circular plate.

10. The elastic self-adaptive axial clamping aluminum tube inner wall polishing device according to claim 1 is characterized in that: It also includes a motor control system and an air source system.

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