Automobile piston tube and synchronous tube expanding and contracting process thereof

Abstract

The application relates to the technical field of piston pipe machining, in particular to an automobile piston pipe and a synchronous pipe expanding and contracting process thereof, which comprises a machining table, the upper surface of the machining table is fixedly connected with a supporting table, the upper surface of the supporting table is provided with a placing rack, the top surface of the placing rack is installed with a lower positioning seat, the outer surface of the placing rack is installed with a positioning rack, the inside of the positioning rack is installed with a cylinder body, and the lower end of the cylinder body is provided with a connecting frame; a first stabilizing frame is installed on the left upper surface of the supporting table. The automobile piston pipe is sequentially inserted into the reduced pipe contracting hole, so that the pipe contracting operation can be completed; when the pipe expanding or contracting operation is completed on one side of the first stabilizing frame, the pipe contracting or expanding operation can be simultaneously completed on one side of the second stabilizing frame, so that the pipe expanding or contracting operation can be simultaneously performed on two ends of a group of automobile piston pipes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of piston pipe processing, in particular to an automobile piston pipe and a synchronous pipe expanding and contracting process thereof. BACKGROUND

[0002] Automobiles are widely used in daily life, and piston pipes are also one of the automobile assembly parts. However, the piston pipes need to be expanded or contracted during processing.

[0003] To this end, Chinese patent number CN113333529B discloses a full-automatic processing device and method for straightening, expanding and contracting a bent copper pipe, which belongs to the technical field of copper pipe processing. The device includes a workbench and an integrated full-automatic processing device. The workbench is horizontally arranged, and the integrated full-automatic processing device is arranged on the workbench. The integrated full-automatic processing device includes a fixing assembly, a bending assembly, a positioning assembly and an expanding and contracting assembly. The fixing assembly, the bending assembly, the positioning assembly and the expanding and contracting assembly are all arranged on the workbench. The device can realize integrated full-automatic operation of the copper pipe during processing, increase production efficiency and save labor.

[0004] However, the existing automobile piston pipe can only be expanded and contracted individually for a group of pipes, which is low in efficiency and cannot be expanded and contracted simultaneously for a group of piston pipes. In addition, oil needs to be sprayed on the outer surface of the piston pipe during the expansion and contraction operations. The existing spraying method can only spray the oil on the outer surface of the piston pipe individually and cannot uniformly spray the oil on the operation site of the piston pipe. Therefore, the friction between the piston pipe and the tool during subsequent operation is large, which can cause wear and tear of the piston pipe and affect its service life. SUMMARY

[0005] The present application aims to provide an automobile piston pipe and a synchronous pipe expanding and contracting process thereof to solve the problems of the existing automobile piston pipe, which can only be expanded and contracted individually for a group of pipes, which is low in efficiency and cannot be expanded and contracted simultaneously for a group of piston pipes. In addition, oil needs to be sprayed on the outer surface of the piston pipe during the expansion and contraction operations. The existing spraying method can only spray the oil on the outer surface of the piston pipe individually and cannot uniformly spray the oil on the operation site of the piston pipe. Therefore, the friction between the piston pipe and the tool during subsequent operation is large, which can cause wear and tear of the piston pipe and affect its service life.

[0006] To achieve the above object, the present application provides the following technical scheme: A kind of automobile piston pipe and its synchronous pipe expansion pipe shrinking process, including processing table, the upper surface of the processing table is fixedly connected with support table, the upper surface of the support table is provided with placing rack, the top surface of the placing rack is installed with lower locating seat, the outer surface of the placing rack is installed with locating rack, the inside of the locating rack is installed with cylinder body, the lower end of the cylinder body is provided with connecting frame, the lower end of the connecting frame is provided with upper locating seat, the upper locating seat and lower locating seat are mutually adapted;

[0007] First stabilizing frame, the first stabilizing frame is installed on the left side upper surface of support table, the right side upper surface of the processing table is installed with second stabilizing frame, the first stabilizing frame and second stabilizing frame are same structure, and installation position is mutually symmetrical, the left side of the first stabilizing frame is installed with drive cylinder, the right side of the first stabilizing frame is installed with driving piece, the inside of the pipe expansion column is provided with pipe shrinking hole, the pipe expansion column is provided with three groups, and the diameter of three groups pipe expansion column and pipe shrinking hole is gradually increased, the lower end of the driving piece is installed with sliding block, the inner side wall of the sliding block is provided with sliding rail, the outer surface of the sliding rail is installed with sliding cylinder, the outer surface of the first stabilizing frame is provided with guide rod.

[0008] Preferably, the front surface of the support table is installed with a side block, the upper surface of the side block is provided with an oil tank body, and the side block and the oil tank body are provided with two groups.

[0009] Preferably, the upper end of the oil tank body is installed with a connecting barrel, the back surface of the connecting barrel is installed with a connecting pipe, the inside of the oil tank body is provided with a pump body, and the end of the connecting pipe away from the connecting barrel is installed with a transfer barrel.

[0010] Preferably, the right surface of the transfer barrel is installed with a mounting block, the upper surface of the mounting block is installed with a bidirectional motor, the right surface of the bidirectional motor is installed with a transmission mechanism, and the left side of the transmission mechanism is installed with a lead screw body.

[0011] Preferably, the lower end of the mounting block is installed with a positioning block, the lead screw body is installed in the inside of the positioning block, and the positioning block limits the lead screw body.

[0012] Preferably, the outer surface of the lead screw body is installed with a movable ring, the lower end of the movable ring is installed with a connecting column, a limiting rod is installed in the inside of the movable ring, the limiting rod is installed on the left surface of the positioning block, the lower end of the connecting column is installed with an oil outlet ring, and the top surface of the oil outlet ring is installed with a connecting hose.

[0013] Preferably, the left surface of the bidirectional motor is installed with a first bevel gear column, and the outer surface of the first bevel gear column is engaged with a second bevel gear column.

[0014] Preferably, the top surface of the second bevel gear column is provided with a rotating disc, the outer surface of the rotating disc is provided with a reciprocating frame, the left side of the reciprocating frame is provided with a piston column, the outer surface of the piston column is provided with an oil inlet cylinder, and the oil inlet cylinder is arranged in the inner part of the middle transfer cylinder.

[0015] Preferably, the outer surface of the piston column is provided with a limiting frame, the top surface of the oil inlet cylinder is provided with a one-way oil inlet pipe, the outer surface of the one-way oil inlet pipe is provided with a one-way valve, and the lower end of the oil inlet cylinder is provided with an oil outlet pipe.

[0016] Preferably, the lower end of the oil outlet pipe is connected with a connecting hose, and the oil inlet cylinder and the oil outlet pipe are arranged in the inner part of the middle transfer cylinder.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1、The automobile piston pipe and the synchronous pipe expanding and contracting process thereof, by means of the supporting table, the placing frame, the lower positioning seat, the positioning frame, the cylinder body, the connecting frame, the upper positioning seat, the first stabilizing frame, the second stabilizing frame, the driving cylinder, the driving part, the pipe expanding column, the pipe contracting hole, the sliding block, the sliding rail and the sliding cylinder, in use, first, the automobile piston pipe is placed on the surface of the lower positioning seat, then the cylinder body is started to drive the connecting frame to move downward, then the automobile piston pipe is clamped and positioned on the surface of the lower positioning seat through the connecting frame, so that the position of the automobile piston pipe is fixed for subsequent processing, when the pipe is expanded, the driving cylinder is started to drive the pipe expanding column in the driving part to enter the inside of the automobile piston pipe, then the pipe expanding column with increased diameter is inserted into the inside of the automobile piston pipe in sequence, so that the pipe expanding operation can be completed, then when the pipe is contracted, the automobile piston pipe is inserted into the inside of the pipe contracting hole in sequence, then the automobile piston pipe is inserted into the inside of the pipe contracting hole with reduced diameter in sequence, so that the pipe contracting operation can be completed, and similarly, when the first stabilizing frame side completes the pipe expanding or contracting operation, the second stabilizing frame side can complete the pipe contracting or expanding operation simultaneously, therefore, the design can simultaneously expand or contract the two ends of a group of automobile piston pipes, the overall operation effect is good, the overall processing efficiency is high, and the functionality of the design is embodied.

[0019] 2、The automobile piston pipe and its synchronous pipe expanding and contracting process, when the pipe contracting or expanding operation is carried out, oil is transported to the inside of the connecting cylinder and the connecting pipe through the pump body in the oil tank body, then the oil enters the inside of the transfer cylinder, at this time the bidirectional motor is started, first the bidirectional motor drives the transmission mechanism to rotate, then the transmission mechanism drives the screw body to rotate, at the same time the screw body is limited by the positioning block, when the screw body rotates, the movable ring on the surface of the screw body moves left and right, at the same time the movable ring drives the connecting column and the oil ejection ring to move, at this time the oil ejection ring sprays oil evenly on the outer surface of the automobile piston pipe, the movement of the movable ring is limited by the limiting rod, at the same time when the bidirectional motor is started, the bidirectional motor also drives the first bevel gear column to rotate, then the first bevel gear column meshes with the second bevel gear column, then the rotating disc drives the rotating disc to rotate, then the rotating disc drives the reciprocating frame to move left and right, so that the reciprocating frame drives the piston column to make piston movement in the inside of the oil inlet cylinder, when the piston column moves to the right in the inside of the oil inlet cylinder, at this time the oil in the inside of the transfer cylinder enters the inside of the oil inlet cylinder through the one-way oil inlet pipe, then when the piston column moves to the left in the inside of the oil inlet cylinder, at this time the piston column extrudes the oil in the inside of the oil inlet cylinder, then the oil is transported to the inside of the connecting hose through the oil outlet pipe, then the oil is sprayed to the outer surface of the automobile piston pipe through the oil ejection ring, and through the design of the one-way valve, the oil body cannot flow back to the inside of the transfer cylinder in the inside of the oil inlet cylinder, therefore the design can uniformly drop oil on the surface of the automobile piston pipe when the automobile piston pipe is processed, so that the friction between the automobile piston pipe and the pipe expanding column or the pipe contracting hole is reduced, the wear is reduced, at the same time the oil also absorbs and dissipates the heat generated during the operation, avoids the deformation of the automobile piston pipe due to overheating, and also can remove the impurities and metal chips on the surface of the pipe, therefore the outer surface of the automobile piston pipe can be uniformly treated, so that the precision and surface quality during the operation are improved, the ingenuity of the design is embodied. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the structure of the present application;

[0021] Figure 2 It is a perspective view of the structure of the present application;

[0022] Figure 3 It is a perspective view of the structure of the present application;

[0023] Figure 4 It is a perspective view of the structure of the present application;

[0024] Figure 5 It is a perspective view of the structure of the present application;

[0025] Figure 6 It is a three-dimensional schematic view of the oil tank body and mounting block structure of the present application;

[0026] Figure 7 It is a three-dimensional schematic view of the bidirectional motor and transmission mechanism structure of the present application;

[0027] Figure 8 It is a three-dimensional schematic view of the piston column and rotating disc structure of the present application;

[0028] Figure 9 It is an enlarged schematic view of the structure at A in the present application Figure 6

[0029] In the figure: 1, processing table; 2, support table; 3, placing rack; 4, lower positioning seat; 5, positioning rack; 6, cylinder body; 7, connecting rack; 8, upper positioning seat; 9, first stabilizing rack; 10, second stabilizing rack; 11, driving cylinder; 12, driving piece; 13, expanded pipe column; 14, pipe hole; 15, sliding block; 16, sliding rail; 17, sliding cylinder; 18, guide rod; 19, side block; 20, oil tank body; 21, connecting cylinder; 22, connecting pipe; 23, transfer cylinder; 24, mounting block; 25, bidirectional motor; 26, transmission mechanism; 27, positioning block; 28, screw body; 29, movable ring; 30, limiting rod; 31, connecting column; 32, oil outlet ring; 33, connecting hose; 34, first bevel gear column; 35, second bevel gear column; 36, rotating disc; 37, reciprocating rack; 38, piston column; 39, oil inlet cylinder; 40, one-way oil inlet pipe; 41, one-way valve; 42, oil outlet pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] Please refer to Figures 1-9 An embodiment provided by the present application:

[0032] ​The application discloses an automobile piston tube and a synchronous tube expanding and contracting process thereof, wherein the cylinder body 6, the first stabilizing frame 9, the second stabilizing frame 10, the driving cylinder 11, the driving part 12, the tube expanding column 13, the tube contracting hole 14, the sliding cylinder 17, the bidirectional motor 25, the transmission mechanism 26, the oil inlet cylinder 39 and the one-way valve 41 are all products that can be directly purchased in the market, the principles and connection modes of which are all prior art known by those skilled in the art, and thus will not be repeated here. The automobile piston tube comprises a processing table 1, the upper surface of the processing table 1 is fixedly connected with a supporting table 2, the upper surface of the supporting table 2 is provided with a placing rack 3, the top surface of the placing rack 3 is installed with a lower positioning seat 4, the outer surface of the placing rack 3 is installed with a positioning rack 5, the inside of the positioning rack 5 is installed with the cylinder body 6, the lower end of the cylinder body 6 is provided with a connecting rack 7, the lower end of the connecting rack 7 is provided with an upper positioning seat 8, the upper positioning seat 8 is matched with the lower positioning seat 4, the front surface of the supporting table 2 is installed with a side block 19, the upper surface of the side block 19 is provided with an oil tank body 20, the side block 19 and the oil tank body 20 are provided with two groups, the upper end of the oil tank body 20 is installed with a connecting barrel 21, the back surface of the connecting barrel 21 is installed with a connecting pipe 22, the inside of the oil tank body 20 is provided with a pump body, the end, away from the connecting barrel 21, of the connecting pipe 22 is installed with a transfer barrel 23, the right side surface of the transfer barrel 23 is installed with a mounting block 24, the upper surface of the mounting block 24 is installed with the bidirectional motor 25, the right side surface of the bidirectional motor 25 is installed with the transmission mechanism 26, the left side of the transmission mechanism 26 is installed with a lead screw body 28, the lower end of the mounting block 24 is installed with a positioning block 27, the lead screw body 28 is installed in the inside of the positioning block 27, the positioning block 27 positions the lead screw body 28, the outer surface of the lead screw body 28 is installed with a movable ring 29, the lower end of the movable ring 29 is installed with a connecting column 31, the inside of the movable ring 29 is inserted and installed with a limiting rod 30, the limiting rod 30 is installed on the left side surface of the positioning block 27, the lower end of the connecting column 31 is installed with an oil outlet ring 32, the top surface of the oil outlet ring 32 is installed with a connecting hose 33, the left side surface of the bidirectional motor 25 is installed with a first bevel gear column 34, the outer surface of the first bevel gear column 34 is engaged with a second bevel gear column 35, the top surface of the second bevel gear column 35 is installed with a rotating disc 36, the outer surface of the rotating disc 36 is installed with a reciprocating rack 37, the left side of the reciprocating rack 37 is installed with a piston column 38, the outer surface of the piston column 38 is installed with the oil inlet cylinder 39, the oil inlet cylinder 39 is installed in the inside of the transfer barrel 23, the outer surface of the piston column 38 is provided with a limiting rack, the top surface of the oil inlet cylinder 39 is installed with a one-way oil inlet pipe 40, the outer surface of the one-way oil inlet pipe 40 is installed with the one-way valve 41, the lower end of the oil inlet cylinder 39 is installed with an oil outlet pipe 42, the lower end of the oil outlet pipe 42 is connected with the connecting hose 33, the oil inlet cylinder 39 and the oil outlet pipe 42 are both installed in the inside of the transfer barrel 23, when the tube contracting or expanding operation is performed, at the moment, the pump body in the oil tank body 20 is used for conveying oil to the inside of the connecting barrel 21 and the connecting pipe 22, then the oil enters the inside of the transfer barrel 23, at the moment, the bidirectional motor 25 is started, first, the bidirectional motor 25 drives the transmission mechanism 26 to rotate,Subsequently transmission mechanism 26 will drive the lead screw body 28 rotation, while the lead screw body 28 will be limited by the positioning block 27, when the lead screw body 28 rotates, the surface of the lead screw body 28 moving ring 29 will move left and right, while the moving ring 29 will drive the connecting column 31 and the oil ring 32 to move, the oil ring 32 will spray oil evenly on the surface of the automobile piston pipe, the movement of the moving ring 29 is limited by the limiting rod 30, while the bidirectional motor 25 starts, the bidirectional motor 25 will drive the first bevel gear column 34 to rotate, then the first bevel gear column 34 and the second bevel gear column 35 meshing, then the rotating disc 36 will drive the rotating disc 36 to rotate, then the rotating disc 36 will drive the reciprocating frame 37 to move left and right, so that the reciprocating frame 37 will drive the piston column 38 to do piston type movement in the oil inlet cylinder 39, when the piston column 38 moves to the right in the oil inlet cylinder 39, the oil in the intermediate cylinder 23 will enter the oil inlet cylinder 39 through the one-way oil inlet pipe 40, then the piston column 38 moves to the left in the oil inlet cylinder 39, the piston column 38 will extrude the oil in the oil inlet cylinder 39, then the oil will be transported to the inside of the connecting hose 33 through the oil outlet pipe 42, then sprayed to the surface of the automobile piston pipe through the oil ring 32, and through the design of the one-way valve 41, the oil will not flow back to the inside of the intermediate cylinder 23 from the oil inlet cylinder 39, so the design can uniformly drop oil on the surface of the automobile piston pipe during the machining operation, so as to reduce the friction between the automobile piston pipe and the expansion pipe column 13 or the pipe hole 14, reduce wear, and the oil will also absorb and dissipate the heat generated during operation, avoid overheating and deformation of the automobile piston pipe, and also can remove the impurities and metal chips on the surface of the pipe, so as to uniformly process the surface of the automobile piston pipe, so as to improve the precision and surface quality during operation;

[0033] The first stabilizing frame 9 is installed on the left upper surface of the support table 2, the second stabilizing frame 10 is installed on the right upper surface of the machining table 1, the first stabilizing frame 9 and the second stabilizing frame 10 are the same in structure and are symmetrical in installation position, the left side of the first stabilizing frame 9 is provided with the driving cylinder 11, the right side of the first stabilizing frame 9 is provided with the driving piece 12, the right side of the driving piece 12 is provided with the pipe expanding column 13, the inside of the pipe expanding column 13 is provided with the pipe reducing hole 14, the pipe expanding column 13 is provided with three groups, and the diameters of the three groups of pipe expanding columns 13 and pipe reducing holes 14 gradually increase, the lower end of the driving piece 12 is provided with the sliding block 15, the inner side wall of the sliding block 15 is provided with the sliding rail 16, the outer surface of the sliding rail 16 is provided with the sliding cylinder 17, the outer surface of the first stabilizing frame 9 is provided with the guide rod 18, the sliding block 15 can be driven to slide on the surface of the sliding rail 16 by the sliding cylinder 17, so that the positions of the pipe expanding column 13 and the pipe reducing hole 14 can be adjusted, first, the automobile piston pipe is placed on the surface of the lower positioning seat 4, then the cylinder body 6 is started to drive the connecting frame 7 to move downward, then the automobile piston pipe is clamped and positioned on the surface of the lower positioning seat 4 by the connecting frame 7, so that the position of the automobile piston pipe is fixed during subsequent machining, when the pipe is expanded, the driving cylinder 11 is started to drive the pipe expanding column 13 in the driving piece 12 to enter the inside of the automobile piston pipe, then the pipe expanding columns 13 with increasing diameters are inserted into the inside of the automobile piston pipe in sequence, so that the pipe expanding operation can be completed, then when the pipe is reduced, the automobile piston pipe is inserted into the inside of the pipe reducing hole 14 in sequence, then the automobile piston pipe is inserted into the pipe reducing hole 14 with a decreasing diameter in sequence, so that the pipe reducing operation can be completed, and the same is true when the pipe expanding or pipe reducing operation is completed on one side of the first stabilizing frame 9, at this time, the pipe reducing or pipe expanding operation can be completed on the other side of the second stabilizing frame 10, so that the design can simultaneously expand or reduce the two ends of a group of automobile piston pipes, the overall operation effect is good, and the overall machining efficiency is high.

[0034] Working principle: when the staff uses the device, first, the device is externally connected to the power supply, thereby providing power support for the device, first, the automobile piston pipe is placed on the surface of the lower positioning seat 4, and then the connecting frame 7 is driven downwardly by the air cylinder body 6, and then the automobile piston pipe is clamped and positioned on the surface of the lower positioning seat 4 through the connecting frame 7, so that the position of the automobile piston pipe is fixed during subsequent processing, when expanding the pipe, the expansion column 13 in the driving part 12 is driven by the driving cylinder 11 to enter the inside of the automobile piston pipe, and then the expanded expansion column 13 is inserted into the inside of the automobile piston pipe in sequence, so that the pipe expanding operation can be completed, and then the pipe shrinking operation is performed, at this time, the automobile piston pipe is inserted into the inside of the pipe shrinking hole 14 in sequence, and then the automobile piston pipe is inserted into the inside of the reduced pipe shrinking hole 14 in sequence, so that the pipe shrinking operation can be completed, and the same is true when the first stabilizing frame 9 side completes the pipe expanding or pipe shrinking operation, at this time, the second stabilizing frame 10 side can synchronously complete the pipe shrinking or pipe expanding operation.

[0035] When the pipe shrinking or pipe expanding operation is performed, the oil is transported into the inside of the connecting cylinder 21 and the connecting pipe 22 through the pump body in the oil tank body 20, and then the oil enters the inside of the transfer cylinder 23, at this time, the bidirectional motor 25 is started, first, the bidirectional motor 25 drives the transmission mechanism 26 to rotate, and then the transmission mechanism 26 drives the screw body 28 to rotate, and at the same time, the screw body 28 is limited by the positioning block 27, when the screw body 28 rotates, the movable ring 29 on the surface of the screw body 28 moves left and right, and at the same time, the movable ring 29 drives the connecting column 31 and the oil outlet ring 32 to move, at this time, the oil outlet ring 32 sprays the oil evenly on the outer surface of the automobile piston pipe, the movement of the movable ring 29 is limited by the limiting rod 30, and at the same time, when the bidirectional motor 25 is started, the bidirectional motor 25 also drives the first bevel gear column 34 to rotate, and then the first bevel gear column 34 meshes with the second bevel gear column 35, and then the rotating disc 36 drives the rotating disc 36 to rotate, and then the rotating disc 36 drives the reciprocating frame 37 to move left and right, so that the reciprocating frame 37 drives the piston column 38 to make piston movement in the inside of the oil inlet cylinder 39, when the piston column 38 moves to the right in the inside of the oil inlet cylinder 39, the oil in the inside of the transfer cylinder 23 enters the inside of the oil inlet cylinder 39 through the one-way oil inlet pipe 40, and then when the piston column 38 moves to the left in the inside of the oil inlet cylinder 39, the piston column 38 extrudes the oil in the inside of the oil inlet cylinder 39, and then the oil is transported into the inside of the connecting hose 33 through the oil outlet pipe 42, and then sprayed to the outer surface of the automobile piston pipe through the oil outlet ring 32, the above is all the working principle of the present application.

[0036] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any person skilled in the art can make some changes, modifications and equivalent changes of the above disclosed technical contents without departing from the technical solution of the present application, and the equivalent embodiments of the present application are still within the protection scope of the present application.

Claims

1. A synchronous pipe expanding and contracting process for an automobile piston pipe and the automobile piston pipe, comprising a processing table (1), and a supporting table (2) fixedly connected to the upper surface of the processing table (1), characterized in that: The upper surface of the support table (2) is provided with a rack (3), the top surface of the rack (3) is provided with a lower positioning seat (4), the outer surface of the rack (3) is provided with a positioning rack (5), the inside of the positioning rack (5) is provided with a cylinder body (6), the lower end of the cylinder body (6) is provided with a connecting frame (7), the lower end of the connecting frame (7) is provided with an upper positioning seat (8), and the upper positioning seat (8) and the lower positioning seat (4) are matched with each other; A first stabilizing frame (9) is installed on the left upper surface of the support table (2), a second stabilizing frame (10) is installed on the right upper surface of the processing table (1), the first stabilizing frame (9) and the second stabilizing frame (10) are the same in structure and are symmetrically arranged, a driving cylinder (11) is installed on the left side of the first stabilizing frame (9), a driving member (12) is installed on the right side of the first stabilizing frame (9), an expansion pipe column (13) is arranged on the right side of the driving member (12), a contraction pipe hole (14) is arranged in the expansion pipe column (13), the expansion pipe column (13) is provided with three groups, and the diameters of the three groups of expansion pipe columns (13) and contraction pipe holes (14) gradually increase, a sliding block (15) is installed at the lower end of the driving member (12), a sliding rail (16) is arranged on the inner side wall of the sliding block (15), a sliding cylinder (17) is installed on the outer surface of the sliding rail (16), and a guide rod (18) is arranged on the outer surface of the first stabilizing frame (9); A side block (19) is installed on the front surface of the support table (2), an oil tank body (20) is arranged on the upper surface of the side block (19), the side block (19) and the oil tank body (20) are provided with two groups, a connecting barrel (21) is installed at the upper end of the oil tank body (20), a connecting pipe (22) is installed on the back surface of the connecting barrel (21), a pump body is arranged in the oil tank body (20), a transfer barrel (23) is installed at the end of the connecting pipe (22) away from the connecting barrel (21), a mounting block (24) is installed on the right side surface of the transfer barrel (23), a bidirectional motor (25) is installed on the upper surface of the mounting block (24), a transmission mechanism (26) is installed on the right side surface of the bidirectional motor (25), and a screw rod body (28) is installed on the left side of the transmission mechanism (26). The outer surface of the screw rod body (28) is mounted with a movable ring (29), the lower end of the movable ring (29) is mounted with a connecting column (31), the inside of the movable ring (29) is mounted with a limiting rod (30), the limiting rod (30) is mounted on the left side surface of the positioning block (27), the lower end of the connecting column (31) is mounted with an oil outlet ring (32), the top surface of the oil outlet ring (32) is mounted with a connecting hose (33), the left side surface of the bidirectional motor (25) is mounted with a first bevel gear column (34), the outer surface of the first bevel gear column (34) is engaged with a second bevel gear column (35), the top surface of the second bevel gear column (35) is mounted with a rotating disc (36), the outer surface of the rotating disc (36) is mounted with a reciprocating frame (37), the left side of the reciprocating frame (37) is mounted with a piston column (38), the outer surface of the piston column (38) is mounted with an oil inlet cylinder (39), the oil inlet cylinder (39) is mounted in the inside of the middle transfer cylinder (23), the outer surface of the piston column (38) is provided with a limiting frame, the top surface of the oil inlet cylinder (39) is mounted with a one-way oil inlet pipe (40), the outer surface of the one-way oil inlet pipe (40) is mounted with a one-way valve (41), the lower end of the oil inlet cylinder (39) is mounted with an oil outlet pipe (42), the lower end of the oil outlet pipe (42) is connected with the connecting hose (33), and the oil inlet cylinder (39) and the oil outlet pipe (42) are both mounted in the inside of the middle transfer cylinder (23).

2. A process for simultaneous tube expanding and tube reducing of an automotive piston tube as claimed in claim 1, wherein: The lower end of the mounting block (24) is mounted with a positioning block (27), the screw rod body (28) is mounted in the inside of the positioning block (27), and the positioning block (27) limits the screw rod body (28).

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