Automatic pipe inner wall polishing tool

Abstract

The utility model provides an automatic pipe inner wall polishing tool which comprises an upper-layer material frame used for placing workpiece pipes to be machined and a lower-layer material frame used for placing finished workpiece pipes, and a conveying fixing mechanism is fixedly arranged between the upper-layer material frame and the lower-layer material frame. Pushing and machining devices are arranged at the two ends of the conveying and fixing mechanism correspondingly, and the pushing and machining devices can reciprocate in the length direction of the conveying and fixing mechanism. The polishing and grinding machine dust collection mechanisms are arranged at the two ends of the conveying and fixing device to complete the polishing machining process of the inner wall of the workpiece pipe, and in the machining process, one polishing and grinding machine sequentially machines the two ends of the workpiece pipe, and meanwhile the dust collection mechanism on the opposite side conducts negative pressure air exhaust. According to the guide rail, scraps can be prevented from being attached to the inner wall of the pipe, operation is carried out in two directions, the length of other guide rails of the whole machine can be greatly shortened, and machining space is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel pipe inner wall polishing equipment technical field especially relates to a pipe inner wall polishing automatic tool. BACKGROUND

[0002] Traditional steel pipe inner wall cleaning adopts sand blasting, but when the surface quality requirement is higher, polishing operation needs to be adopted. Pipe inner wall polishing is a process of improving the surface smoothness of the pipe inner wall and is widely used in medical devices, petroleum chemical industry, food processing and other fields. The existing polishing equipment mostly cannot realize automatic feeding and discharging to complete the polishing process, and a large amount of residual chips are stored in the pipe during the polishing process, which needs to be cleaned manually after processing. SUMMARY

[0003] The utility model solves the technical problem that the existing technology has defects, and provides a pipe inner wall polishing automatic tool, which realizes automatic feeding and discharging, and avoids the adhesion of residual chips on the inner wall of the pipe through negative pressure suction during the polishing operation.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of a pipe inner wall polishing automatic tool, which comprises an upper layer rack for placing workpiece pipes to be processed and a lower layer rack for placing finished workpiece pipes, a conveying fixing mechanism is fixedly arranged between the upper layer rack and the lower layer rack, push processing devices are arranged at both ends of the conveying fixing mechanism based on the conveying fixing mechanism, and the push processing devices can reciprocate along the length direction of the conveying fixing mechanism.

[0005] The push processing device comprises a polishing grinder, a dust collection mechanism and a first base, the first base is movably arranged on a guide rail arranged in parallel with the length direction of the conveying fixing mechanism, and the polishing grinder and the dust collection mechanism are horizontally fixedly arranged on the side of the first base facing the conveying fixing mechanism.

[0006] The push processing device comprises a first push processing device and a second push processing device, the first push processing device and the second push processing device are symmetrically arranged at both ends of the conveying fixing mechanism, and the polishing grinder on any side and the dust collection mechanism on the other side are located on the same axis.

[0007] Further, the conveying fixing mechanism comprises a conveying mechanism and a fixing mechanism, the fixing mechanism is movably arranged on the conveying mechanism and at both ends, and is used for limiting and fixing the workpiece pipes to be processed on the conveying mechanism.

[0008] Furthermore, the fixing mechanism includes a fixed pressure roller and a grinding limiting fixing mechanism. The fixed pressure roller is movably fixed above the conveying mechanism and can reciprocate vertically, while the grinding limiting fixing mechanism is fixedly mounted on the first base.

[0009] Furthermore, the fixed pressure roller is disposed on the first cylinder, which is vertically fixed above the conveying mechanism. There are multiple fixed pressure rollers, which are used to press the middle section of the workpiece tube to be processed onto the conveying mechanism.

[0010] Furthermore, the grinding and limiting fixing mechanism includes a limiting sleeve fixed on the first base, and a bearing is fixedly disposed in the limiting sleeve. The end of the workpiece tube to be processed can be embedded in the bearing. The geometric center of the bearing is on the same axis as the rotating shaft of the polishing and grinding machine.

[0011] Furthermore, the conveying mechanism includes a pneumatic conveying mechanism, which includes a second base and a first conveying plate and a second conveying plate disposed on the second base. The upper surfaces of the first conveying plate and the second conveying plate are both inclined structures with the same inclination direction, and the first conveying plate and the second conveying plate are translated and misaligned.

[0012] The first conveyor plate is fixedly mounted on the second base, and a second cylinder is fixedly mounted vertically on the second base. The second conveyor plate is fixedly mounted on the telescopic rod of the cylinder.

[0013] Furthermore, a first processing groove is provided on the second conveyor plate, and a second processing groove is provided on the first conveyor plate. The positions of the first and second processing grooves correspond to the positions of the polishing and grinding machine and the dust collection mechanism on either side. The height of the second conveyor plate is lower than the height of the first conveyor plate. A first stop and a second stop are provided on the second conveyor plate. The first stop, the second stop, and the upper surface of the second conveyor plate form the first processing groove. The upper surface of the first stop is also inclined, and the lowest point of the first stop is smaller than the highest point of the first conveyor plate. The sum of the lengths of the first stop and the first processing groove is greater than the translational misalignment distance between the first and second conveyor plates.

[0014] A third stop and a fourth stop are fixedly disposed on the first conveyor plate. The third stop, the fourth stop, and the upper surface of the first conveyor plate form the second processing groove. The upper surfaces of the third stop and the fourth stop are both inclined structures, and the lowest point of the third stop is smaller than the highest point of the fourth stop.

[0015] Furthermore, it also includes an auxiliary roller assembly, which is fixedly mounted on the second base on the side of the first conveyor plate facing away from the second conveyor plate. There are two sets of auxiliary roller assemblies, whose positions correspond to the positions of the first processing groove and the second processing groove. Each auxiliary roller assembly includes two auxiliary rollers arranged side by side with a certain gap, the gap being smaller than the diameter of the workpiece tube.

[0016] Furthermore, a photoelectric switch is also provided on the second base. The photoelectric switch is fixedly installed close to the auxiliary roller group, and the number of photoelectric switches is the same as the number of auxiliary roller groups. The photoelectric switch transmits an electrical signal to the control unit to regulate the pushing processing device to complete the processing of the workpiece tube.

[0017] Furthermore, the conveying mechanism also includes automatic rollers, which are fixedly disposed close to the pushing processing device between the upper material rack and the lower material. The sum of the length of the automatic rollers at both ends and the distance between the automatic rollers is not less than the length of the workpiece tube.

[0018] Compared with the prior art, the beneficial effects of this utility model include:

[0019] 1) The polishing process of the inner wall of the workpiece tube is completed by setting polishing and grinding machine dust collection mechanism at both ends of the conveying and fixing device. During the processing, one polishing and grinding machine processes both ends of the workpiece tube in sequence, while the dust collection mechanism on the opposite side uses negative pressure to draw air, which can prevent the residue from adhering to the inner wall of the tube. By operating in two directions, the length of the guide rail of the whole equipment can be greatly shortened, saving processing space.

[0020] 2) By setting up a pneumatic conveying mechanism, the polishing process of the inner wall of both ends of the workpiece tube is completed by the cooperation of the first conveying plate and the second conveying plate. With the help of the upper and lower material racks, the polishing process of the inner wall of the tube can be automated, effectively reducing the participation of manpower.

[0021] 3) By setting fixed pressure rollers and grinding machine limiting and fixing mechanisms to fix the middle and end sections of the workpiece tube during processing, it is possible to effectively prevent the workpiece tube from jumping during processing and ensure processing accuracy;

[0022] 4) By setting up automatic rollers that are in the opposite direction to the rotation of the polishing and grinding machine, the work efficiency of the polishing and grinding process of the inner wall of the pipe can be effectively improved, and the auxiliary roller group is used for support and rotation. Attached Figure Description

[0023] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0024] Figure 1 The schematic diagram shows a top view of the automated tooling for polishing the inner wall of a pipe.

[0025] Figure 2 The diagram illustrates the left view of the automated tooling for polishing the inner wall of a tube.

[0026] Figure 3 The schematic diagram shows a top view of the push-processing device;

[0027] Figure 4 The schematic diagram shows the top view of the pneumatic conveying mechanism;

[0028] Figure 5 The side structure of the second conveyor plate is schematically shown;

[0029] Figure 6 The side structure of the first conveyor plate is shown schematically.

[0030] The diagram is labeled as follows: 1-Upper material rack, 2-Lower material rack, 3-Pushing processing device, 31-Polishing and grinding machine, 32-Dust collection mechanism, 4-Fixed pressure roller, 5-Grinding limit fixing mechanism, 6-Pneumatic conveying mechanism, 61-Second base, 62-First conveying plate, 621-Second processing groove, 622-Third stop, 623-Fourth stop, 63-Second conveying plate, 631-First processing groove, 632-First stop, 633-Second stop, 64-Auxiliary roller group, 7-Automatic roller. Detailed Implementation

[0031] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0032] Figure 1 The schematic diagram shows a top view of the automated tooling for polishing the inner wall of a pipe. Figure 2 The schematic diagram shows the left view of an automated tooling for polishing the inner wall of a pipe. An automated tooling for polishing the inner wall of a pipe, as shown... Figure 1 and 2As shown, the device includes an upper rack 1 for placing the workpiece tube to be processed and a lower rack 2 for placing the finished workpiece tube. A conveying and fixing mechanism is fixedly installed between the upper rack 1 and the lower rack 2 to complete the automatic feeding process and simultaneously fix the workpiece tube during the inner wall polishing process to ensure its stability during processing. Based on the aforementioned conveying and fixing mechanism, a pushing processing device 3 is provided at both ends. The pushing processing device 3 can reciprocate along the length direction of the conveying and fixing mechanism to meet the switching between processing and conveying states, so as to facilitate the automatic loading and unloading process of the workpiece tube and realize the automatic polishing process of the inner wall of the workpiece tube.

[0033] Figure 3 The schematic diagram shows a top view of the push-processing device, which is combined with the following Figure 3 The pushing and processing device 3 will be described in detail. The pushing and processing device 3 includes a polishing and grinding machine 31, a dust collection mechanism 32, and a first base. The first base is movably mounted on a guide rail parallel to the length direction of the conveying and fixing mechanism. A servo motor and lead screw structure can be used to drive the pushing and processing device 3 to reciprocate along the length direction of the guide rail. By using a servo motor and lead screw for driving, the movement distance of the pushing and processing device 3 can be precisely controlled, thereby meeting the requirements for polishing the inner wall of workpiece tubes of different lengths. The rotation and speed control of the aforementioned servo motor can be controlled by a control unit, which can also control whether the polishing and grinding machine 31 and the dust collection mechanism 32 are started.

[0034] It is worth noting that the aforementioned polishing and grinding machine 31 and dust collection mechanism 32 are horizontally fixed on the side of the first base facing the conveying and fixing mechanism. The aforementioned pushing processing device 3 includes a first pushing processing device and a second pushing processing device, which are used to distinguish the pushing processing devices 3 set at both ends of the conveying and fixing mechanism. The aforementioned first pushing processing device and second pushing processing device are symmetrically set at both ends of the conveying and fixing mechanism, and the polishing and grinding machine 31 on one side and the dust collection mechanism 32 on the other side are located on the same axis. Specifically, during the polishing process of the inner wall of the workpiece tube, the polishing and grinding machine 31 extends into one end of the workpiece tube to complete the inner wall polishing process, while the dust collection mechanism 32 located at the other end extends into the workpiece tube to complete the negative pressure suction process, preventing debris from adhering to the inner wall of the tube. By vertically staggering the polishing and grinding machine 31 and the dust collection mechanism 32, the inner wall polishing process of the workpiece tube can be carried out from two directions, which greatly shortens the length of the guide rail of the entire equipment, saves processing space and improves processing stability.

[0035] The following is a detailed description of the conveying and fixing mechanism. The conveying and fixing mechanism includes a conveying mechanism and a fixing mechanism. The conveying mechanism receives the workpiece tube to be processed from the upper material rack 1 and transports it to the processing station. After processing is completed, the workpiece tube is transferred to the lower material rack 2, completing the automatic loading and unloading process. The mechanism pauses during the conveying process to assist in the polishing of the inner wall of the tube. The fixing mechanism is used to fix the workpiece tube during the polishing process to prevent it from jumping during processing, ensuring its stability and thus guaranteeing the polishing accuracy of the inner wall of the workpiece tube.

[0036] like Figure 3 As shown, the aforementioned fixing mechanism includes a fixed pressure roller 4 and a grinding limiting fixing mechanism 5. The fixed pressure roller 4 is movably fixed above the conveying mechanism and can reciprocate vertically. The fixed pressure roller 4 and the conveying mechanism work together to fix the workpiece tube between the fixed pressure roller 4 and the conveying mechanism. The fixed pressure roller 4 is mainly used to fix the middle section of the workpiece. The grinding limiting fixing mechanism 5 is fixedly set on the first base and moves with the reciprocating motion of the first base on the guide rail. It is used to fix the end of the workpiece tube to ensure that the polishing head located on the polishing and grinding machine 31 can enter the workpiece tube to complete the inner wall polishing process.

[0037] The aforementioned fixed pressure roller 4 is disposed on the first cylinder, and the first cylinder is fixed vertically above the conveying mechanism. There may be multiple fixed pressure rollers 4. The aforementioned first cylinder may be fixed based on the working environment or based on a bracket provided above the conveying mechanism to fix the first cylinder. This utility model does not limit this, and any way that can fix the first cylinder above the conveying mechanism can be applied to this utility model.

[0038] The aforementioned grinding and limiting fixing mechanism 5 includes a limiting sleeve fixed to the first base, and a bearing fixedly disposed within the limiting sleeve. The end of the workpiece tube can be embedded in the aforementioned bearing, and the geometric center of the aforementioned bearing is located on the same axis as the rotating shaft of the polishing machine 31. By using the bearing located within the limiting sleeve, on the one hand, the runout process of the workpiece tube during the polishing process of the inner wall of the tube can be further reduced; on the other hand, since the bearing is fixedly disposed on the first base, its positional relationship with the polishing machine 31 is fixed. Therefore, embedding the workpiece tube into the aforementioned bearing can effectively ensure that the polishing head enters the workpiece tube to complete the inner wall polishing process.

[0039] The aforementioned conveying mechanism includes a pneumatic conveying mechanism 6. Figure 4 The schematic diagram shows a top view of the pneumatic conveying mechanism, which is illustrated below. Figure 2 as well as Figure 4The aforementioned pneumatic conveying mechanism 6 will be described in detail.

[0040] The pneumatic conveying mechanism 6 includes a second base 61 and a first conveying plate 62 and a second conveying plate 63 disposed on the second base 61. The upper surfaces of the first conveying plate 62 and the second conveying plate 63 are both inclined in the same direction. The highest point of the second conveying plate 63 receives the workpiece tube to be processed from the upper shelf 1, and the processed workpiece tube is transferred to the lower shelf 2 via the lowest point of the first conveying plate 62. It is worth noting that the first conveying plate 62 and the second conveying plate 63 are arranged in a translationally offset manner. The first conveying plate 62 is fixedly disposed on the second base 61, and a second cylinder is vertically fixedly disposed on the second base 61. The second conveying plate 63 is fixedly disposed on the extension rod of the cylinder. It is worth noting that the height of the second conveying plate 63 is less than the height of the first conveying plate 62. The second cylinder lifts the second conveying plate 63, thereby lifting the workpiece tube to complete the switching of work positions or to transfer the workpiece tube to the lower shelf 2.

[0041] A first processing groove 631 is provided on the aforementioned second conveyor plate 63, and a second processing groove 621 is provided on the first conveyor plate 62. The positions of the aforementioned first processing groove 631 and second processing groove 621 correspond to the positions of the polishing and grinding machine 31 and the dust collection mechanism 32 on either side. That is, the positions of the first processing groove 631 and second processing groove 621 correspond to the two workstations at both ends of the workpiece tube.

[0042] Figure 5 The side structure of the second conveyor plate is schematically shown below. Figure 5 The second conveyor plate 63 will be described in detail. A first stop 632 and a second stop 633 are provided on the second conveyor plate 63. The first stop 632, the second stop 633 and the upper surface of the second conveyor plate 63 form the aforementioned first processing groove 631. The upper surface of the aforementioned first stop 632 is also an inclined mechanism, and the lowest point of the first stop 632 is lower than the highest point of the first conveying plate 62. When the workpiece tube rolls onto the pneumatic conveying mechanism 6, due to the presence of the first processing groove 631 located on the second conveying plate 63, the workpiece tube will fall into the first processing groove 631. The upper surfaces of the first stop 632 and the first conveying plate 62 are both inclined structures in the same direction. When the workpiece tube rolls to the lowest point of the first stop 632, the highest point of the first conveying plate 62 is higher than the lowest point of the first stop 632. It can block the rolling trend of the workpiece tube, thereby confining the workpiece tube in the first processing groove 631. Under the action of the polishing and grinding machine 31 and the dust collection mechanism 32, the internal polishing process of one end of the tube is completed.

[0043] Figure 6The side structure of the first conveyor plate is schematically shown below. Figure 6 The first conveyor plate 62 is described in detail below. A third stop 622 and a fourth stop 623 are fixedly mounted on the first conveyor plate 62. The third stop 622, the fourth stop 623, and the upper surface of the first conveyor plate 62 form a second processing groove 621. The upper surfaces of the aforementioned third stop 622 and fourth stop 623 are both inclined structures, and the lowest point of the third stop 622 is lower than the highest point of the fourth stop 623. After the workpiece tube completes the internal polishing process at one end in the first processing groove 631, the second conveyor plate 63, under the action of the second cylinder, lifts the workpiece tube in the first processing groove 631 to a position higher than the highest point of the first conveyor plate 62. At this time, due to the inclined structure of the upper surface of the third stop 622 on the first conveyor plate 62 and the action of gravity, the workpiece tube can continue to roll downwards. After the second conveyor plate 63 moves downwards, it can continue to roll downwards and fall into the second processing groove 621 located on the first conveyor plate 62, thereby completing the internal polishing process at the other end.

[0044] It is worth noting that, such as Figure 2 As shown, the second stop 633, which is set on the second conveyor plate 63, can block the downward rolling motion of the workpiece tube when it is lifted from the first processing groove 631. When the second conveyor plate 63 is lifted, if there is a workpiece tube in the second processing groove 621, it will be lifted by the second conveyor plate 63 and roll downward under the inclined structure of the first conveyor plate 62 and the second conveyor plate 63 and gravity. At this time, blocking the movement of the workpiece tube lifted from the first processing groove 631 helps to ensure that it can fall into the second processing groove 621 to complete the polishing process of the other end of the tube, which helps to automatically polish the inner walls of both ends of the workpiece tube. Without the second stop 633, the workpiece tube lifted from the first processing groove 631 may fall directly into the lower material rack 2 without polishing the other end after completing the polishing process of one end of the tube due to the second conveyor plate 63 being lifted too high.

[0045] The aforementioned pneumatic conveying mechanism 6 also includes an auxiliary roller assembly 64, which is fixedly mounted on the second base 61 on the side of the first conveying plate 62 facing away from the second conveying plate 63. In each pneumatic conveying mechanism 6, there are two sets of the aforementioned auxiliary roller assemblies 64, positioned corresponding to the positions of the first processing groove 631 and the second processing groove 621, used to provide support and rotational assistance to the workpiece tube during processing. The aforementioned auxiliary roller assembly 64 includes two auxiliary rollers arranged side-by-side with a certain gap, the gap being smaller than the diameter of the workpiece tube.

[0046] A photoelectric switch is also provided on the aforementioned second base 61. The photoelectric switch is fixed close to the auxiliary roller group 64, and the number of photoelectric switches is the same as the number of auxiliary roller groups 64. The photoelectric switch transmits an electrical signal to the control unit to adjust the opening and closing state of the polishing machine 31 and the dust collection mechanism 32 corresponding to the position of the first processing groove 631 or the second processing groove 621. The control unit also controls the running time of the polishing machine 31 and the dust collection mechanism 32. After the polishing process inside the tube is completed, the servo motor is controlled to drive the first base back to its original position, and the first cylinder and the second cylinder are driven to move to complete the transfer process of the workpiece tube. When the workpiece tube is back in place, the photoelectric switch is triggered again, so that the pushing processing device 3 approaches again, and the first cylinder and the second cylinder move to complete the clamping of the workpiece tube.

[0047] like Figure 3 As shown, the aforementioned conveying mechanism also includes automatic rollers 7. The automatic rollers 7 are fixedly installed close to the pushing processing device 3 between the upper material rack 1 and the lower material rack 2. The aforementioned auxiliary roller group 64 is completely overlapped with the automatic rollers 7 from the side. The sum of the length of the automatic rollers 7 at both ends and the distance between the automatic rollers 7 is not less than the length of the workpiece tube, so as to ensure that both ends of the workpiece tube can fall on the automatic rollers 7. The rotation direction of the aforementioned automatic rollers 7 is opposite to the rotation direction of the polishing machine, which can improve the working efficiency of the tube polishing process.

[0048] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An automatic tooling for polishing the inner wall of a pipe, characterized in that, It includes an upper shelf (1) for placing the workpiece tube to be processed and a lower shelf (2) for placing the finished workpiece tube. A conveying and fixing mechanism is fixedly arranged between the upper shelf (1) and the lower shelf (2). A pushing and processing device (3) is provided at both ends of the conveying and fixing mechanism. The pushing and processing device (3) can reciprocate along the length direction of the conveying and fixing mechanism. The pushing processing device (3) includes a polishing machine (31), a dust collection mechanism (32) and a first base. The first base is movably mounted on a guide rail that is parallel to the length direction of the conveying and fixing mechanism. The polishing machine (31) and the dust collection mechanism (32) are horizontally fixed on the side of the first base facing the conveying and fixing mechanism. The pushing processing device (3) includes a first pushing processing device and a second pushing processing device. The first pushing processing device and the second pushing processing device are symmetrically arranged based on the two ends of the conveying and fixing mechanism. The polishing and grinding machine (31) on one side and the dust collection mechanism (32) on the other side are located on the same axis.

2. The automatic tooling for polishing the inner wall of a pipe according to claim 1, characterized in that, The conveying and fixing mechanism includes a conveying mechanism and a fixing mechanism. The fixing mechanism is movably disposed on the conveying mechanism and at both ends, and is used to limit and fix the workpiece tube to be processed on the conveying mechanism.

3. The automatic tooling for polishing the inner wall of a pipe according to claim 2, characterized in that, The fixing mechanism includes a fixed pressure roller (4) and a grinding limiting fixing mechanism (5). The fixed pressure roller (4) is movably fixed above the conveying mechanism and can reciprocate vertically. The grinding limiting fixing mechanism (5) is fixedly installed on the first base.

4. The automatic tooling for polishing the inner wall of a pipe according to claim 3, characterized in that, The fixed pressure roller (4) is disposed on the first cylinder, which is fixed vertically above the conveying mechanism. There are multiple fixed pressure rollers (4) used to press the middle section of the workpiece tube to be processed onto the conveying mechanism.

5. The automatic tooling for polishing the inner wall of a pipe according to claim 3, characterized in that, The grinding and limiting fixing mechanism (5) includes a limiting sleeve fixed on the first base, and a bearing is fixedly installed in the limiting sleeve. The end of the workpiece tube to be processed can be embedded in the bearing. The geometric center of the bearing is on the same axis as the rotating shaft of the polishing and grinding machine (31).

6. The automatic tooling for polishing the inner wall of a pipe according to claim 4, characterized in that, The conveying mechanism includes a pneumatic conveying mechanism (6), which includes a second base (61) and a first conveying plate (62) and a second conveying plate (63) disposed on the second base (61). The upper surfaces of the first conveying plate (62) and the second conveying plate (63) are inclined and in the same direction. The first conveying plate (62) and the second conveying plate (63) are translated and misaligned. The first conveying plate (62) is fixedly mounted on the second base (61), and a second cylinder is fixedly mounted on the second base (61) in a vertical direction. The second conveying plate (63) is fixedly mounted on the telescopic rod of the cylinder.

7. The automatic tooling for polishing the inner wall of a pipe according to claim 6, characterized in that, A first processing groove (631) is provided on the second conveyor plate (63), and a second processing groove (621) is provided on the first conveyor plate (62). The positions of the first processing groove (631) and the second processing groove (621) correspond to the positions of the polishing machine (31) and the dust collection mechanism (32) on either side. The height of the second conveyor plate (63) is lower than the height of the first conveyor plate (62). A first stop (632) and a second stop (633) are provided on the second conveyor plate (63). The first stop (632), the second stop (633) and the upper surface of the second conveyor plate (63) form the first processing groove (631). The upper surface of the first stop (632) is also inclined, and the lowest point of the first stop (632) is smaller than the highest point of the first conveyor plate (62). The sum of the lengths of the first stop (632) and the first processing groove (631) is greater than the translational misalignment distance between the first conveyor plate (62) and the second conveyor plate (63). A third stop (622) and a fourth stop (623) are fixedly disposed on the first conveyor plate (62). The third stop (622), the fourth stop (623) and the upper surface of the first conveyor plate (62) form the second processing groove (621). The upper surfaces of the third stop (622) and the fourth stop (623) are both inclined structures, and the lowest point of the third stop (622) is smaller than the highest point of the fourth stop (623).

8. The automatic tooling for polishing the inner wall of a pipe according to claim 7, characterized in that, It also includes an auxiliary roller assembly (64), which is fixedly mounted on the second base (61) on the side of the first conveyor plate (62) facing away from the second conveyor plate (63). The auxiliary roller assembly (64) consists of two sets, whose positions correspond to the positions of the first processing groove (631) and the second processing groove (621). The auxiliary roller assembly (64) includes two auxiliary rollers arranged side by side with a certain gap, the gap being smaller than the diameter of the workpiece tube.

9. The automatic tooling for polishing the inner wall of a pipe according to claim 8, characterized in that, A photoelectric switch is also provided on the second base (61). The photoelectric switch is fixedly installed close to the auxiliary roller group (64), and the number of the photoelectric switches is the same as the number of the auxiliary roller group (64). The photoelectric switch transmits electrical signals to the control unit to regulate the push processing device (3) to complete the processing of the workpiece tube.

10. The automatic tooling for polishing the inner wall of a pipe according to claim 6, characterized in that, The conveying mechanism also includes automatic rollers (7), which are fixedly installed close to the pushing processing device (3) between the upper material rack (1) and the lower material. The sum of the length of the automatic rollers (7) at both ends and the distance between the automatic rollers (7) is not less than the length of the workpiece tube.

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