Automatic chambering mechanism for connecting pipe

Abstract

The utility model discloses an automatic chambering mechanism for connecting pipes, which belongs to the technical field of connecting pipe processing and comprises a stamping table, a vibration feeding disc and a plurality of connecting pipes which are positioned on the outer side of the stamping table, are arranged on the vibration feeding disc and are used for conveying the connecting pipes to the stamping table one by one, and the stamping table is provided with a conveying device, a feeding end of the conveying device is connected with a discharging end of the vibration feeding disc; the stamping device comprises a conveying device, a stamping table, a pushing device located on one side of the discharging end of the conveying device and moving on the stamping table in a reciprocating mode, a positioning device located on the other side of the discharging end of the conveying device and moving on the stamping table in an opening and closing mode, and a transverse moving device located above the conveying device and moving on the stamping table transversely. And the transverse moving device is arranged on the transverse moving device and moves longitudinally towards the positioning device. According to the mechanism, automatic and continuous feeding, reaming and discharging work of the connecting pipe can be achieved, the production efficiency and safety coefficient are high, the labor intensity of workers is low, the production cost is low, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting pipe processing, in particular to an automatic hole expanding mechanism for a connecting pipe. Background Art

[0002] The connection between the compressor and the liquid receiver often requires a connecting pipe, such as Figure 1 The end of the connecting pipe 1 shown needs to be enlarged. In the existing connecting pipe enlarging process, manual loading is required, and then the enlarging is completed by stamping equipment, and finally the unloading is completed manually. Among them, there are great safety hazards in the manual loading and unloading operations. In addition, workers need to stay next to the stamping equipment for a long time to load and unload materials. The working environment is poor. At the same time, they are affected by the loud noise of the stamping equipment for a long time, which makes them prone to occupational diseases. In addition, workers need to be arranged to complete the loading and unloading work, and the labor cost is extremely high.

[0003] Therefore, further improvement is necessary. Utility Model Content

[0004] The utility model aims to provide an automatic hole expanding mechanism for a connecting pipe, so as to overcome the shortcomings of the prior art.

[0005] An automatic hole-expanding mechanism for a connecting pipe designed for this purpose comprises a punching table and a vibrating feeding plate, which is located outside the punching table and on which a plurality of connecting pipes are placed, and the connecting pipes are transported to the punching table one by one.

[0006] The stamping table is provided with:

[0007] A conveying device, the feeding end of which is connected to the discharging end of the vibrating feeding tray,

[0008] A pushing device is located at one side of the discharging end of the conveying device and reciprocates on the punching table.

[0009] A positioning device is located at the other side of the discharge end of the conveying device and is movable on the stamping table.

[0010] A transverse movable device is located above the conveying device and moves transversely on the punching table.

[0011] The punching device is arranged on the transverse movable device and moves longitudinally toward the positioning device.

[0012] The conveying device includes a conveying bracket, a conveying belt, and a conveying driver, wherein the conveying bracket is fixedly arranged on the stamping table, and rotating wheels are rotatably arranged at both ends of the conveying bracket, the conveying belt is wound around the rotating wheels at both ends, and the conveying driver is fixedly arranged on the conveying bracket or the stamping table, and is drivingly connected to one of the rotating wheels.

[0013] The pushing device includes a pushing driver, a pushing slider, and a pushing piece, wherein the pushing driver is located at one side of the conveyor belt and is fixedly arranged on the stamping table, the pushing driver is drivingly connected to the pushing piece, the pushing slider is fixedly arranged on the stamping table, the pushing piece is driven by the pushing driver to slide on the pushing slider, and reciprocates on one side of the conveyor belt while sliding, and pushes the connecting pipes on the conveyor belt onto the positioning device one by one.

[0014] The positioning device includes a positioning block, a fixed die base, a movable die base, and a die base driver, wherein the positioning block is located at the other side of the conveyor belt and fixedly arranged on the stamping table, the positioning block is provided with a die base movable groove, the fixed die base is fixedly arranged on one side of the die base movable groove, the die base driver is located at the other side of the die base movable groove and fixedly arranged on the stamping table, the die base driver is connected to the movable die base driving, the movable die base is driven by the die base driver to slide on the other side of the die base movable groove, and approaches or moves away from the fixed die base when sliding, so as to realize the opening and closing between the movable die base and the fixed die base.

[0015] The positioning block is provided with a movable groove for a connecting tube, and the movable groove for the connecting tube is perpendicular to and connected with the movable groove for the mold base. The pushing piece pushes the connecting tube to the connecting point between the movable groove for the connecting tube and the movable groove for the mold base, and fixes the connecting tube at the connecting point between the movable groove for the connecting tube and the movable groove for the mold base when the movable mold base is close to the fixed mold base.

[0016] The positioning block is provided with an ejecting elastic member for automatically ejecting the connecting pipe, and the ejecting elastic member is located at the connecting portion between the movable groove of the connecting pipe and the movable groove of the mold base.

[0017] A micro-push driver is also provided on the stamping table or the positioning block. The micro-push driver is located on one side of the fixed mold base or the movable mold base and is fixedly provided on the stamping table or the positioning block along the axis of the movable groove of the mold base. A micro-push member is driven and connected to the micro-push driver. The micro-push member is retracted and extended on the fixed mold base or the movable mold base by the driving of the micro-push driver, and slightly pushes the connecting tube when retracting and extending. A collecting tray is also provided on the outer side of the positioning block.

[0018] A vertical plate is fixedly provided on the stamping table, and the transverse movable device includes a transverse driver, a screw rod, a transfer block, a transverse sliding block, and a transverse movable plate, wherein the transverse driver is fixedly provided on the vertical plate and is drivingly connected to the screw rod, two transfer blocks are provided, and are fixed on the vertical plate at intervals along the conveying direction of the connecting pipe, the screw rod is driven to rotate between the two transfer blocks by the transverse driver, and drives the transverse sliding block to perform transverse reciprocating movement along the conveying direction of the connecting pipe, a transverse slide rail is provided on the vertical plate, the transverse movable plate is fixedly connected to the transverse sliding block, and a transverse slider is provided thereon, and the transverse slider and the transverse slide rail slide in cooperation with each other.

[0019] The stamping device includes a stamping driver, a longitudinal sliding block, a longitudinal guide rod, a guide rod fixing block, a stamping connecting plate, and a stamping movable plate, wherein two guide rod fixing blocks are provided and are longitudinally fixed on the transverse movable plate at intervals, two longitudinal guide rods are provided and are respectively fixed between the two transverse movable plates, the longitudinal sliding block guides and slides on the two longitudinal guide rods, the stamping connecting plate is fixed on the longitudinal sliding block and is connected to the stamping driver, the stamping movable plate is cooperatively connected with the stamping connecting plate, and a stamping head is provided in the direction of the positioning block.

[0020] The stamping heads are provided with several different sizes, and several of the stamping heads are fixedly arranged at intervals at the bottom of the stamping movable plate along the direction of the connecting pipe conveying. A stamping movable plate slider is provided at the top of the stamping movable plate along the direction of the connecting pipe conveying, and a stamping connecting plate sliding piece is provided at the bottom of the stamping connecting plate along the direction of the connecting pipe conveying, and the stamping connecting plate sliding piece and the stamping movable plate slider slide in cooperation with each other.

[0021] The utility model improves the above structure by utilizing the connection between the vibrating feeding plate and the conveying device to convey the connecting tubes one by one to complete the automatic loading of the connecting tubes, utilizes the pushing device to push the connecting tubes on the conveying device onto the positioning device, and utilizes the positioning device to position the pushed connecting tubes, and then utilizes the lateral movement of the lateral movable device to enable the punching device to align with the positioned connecting tubes and complete the punching and expanding of the connecting tubes, when the expanding of the connecting tubes is completed, the positioning device is opened, and the pushing device continues to push new connecting tubes, at which time the new connecting tubes can push the punched and expanded connecting tubes away from the positioning device and complete the unloading, so that the connecting tubes can realize automatic and continuous loading, expanding and unloading, thereby greatly improving the production efficiency, and at the same time the entire production process does not require manual participation, has a high safety factor, and can also effectively reduce the labor intensity and production costs of workers, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the cross-sectional structure of the connecting pipe.

[0023] Figure 2 This is a schematic diagram of the assembly structure of an embodiment of the utility model.

[0024] Figure 3 This is a schematic diagram of the assembly structure from another perspective of an embodiment of the utility model.

[0025] Figure 4 The figure is a schematic diagram of the exploded structure of an embodiment of the utility model.

[0026] Figure 5 This is a schematic diagram of the exploded structure from another perspective of an embodiment of the utility model.

[0027] Figure 6 Schematic diagram of the exploded structure of the positioning device.

[0028] Figure 7 This is a schematic diagram of the decomposition structure of the positioning device from another perspective.

[0029] Figure 8 It is a schematic diagram of the exploded structure of the stamping device and the transverse movable plate.

[0030] Fig. 9 This is a schematic diagram of the exploded structure of the stamping device and the horizontal movable plate from another perspective. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0033] See also Figure 1-Figure 9 The automatic hole expanding mechanism of the connecting pipe includes a punching table 2 and a vibrating feeding plate, which is located outside the punching table 2 and has a plurality of connecting pipes 1 placed thereon, and the connecting pipes 1 are transported to the punching table 2 one by one.

[0034] The punching table 2 is provided with:

[0035] The feeding end of the conveying device A is connected to the discharging end of the vibrating feeding tray.

[0036] The pusher device B is located at one side of the discharge end of the conveyor device A and reciprocates on the punching table 2.

[0037] The positioning device C is located on the other side of the discharge end of the conveying device A and can be opened and closed on the punching table 2.

[0038] The transverse movable device D is located above the conveying device A and moves transversely on the punching table 2.

[0039] The punching device E is arranged on the transverse movable device D and moves longitudinally toward the positioning device C.

[0040] This embodiment utilizes the connection between the vibrating feeding plate and the conveying device A to convey the connecting tubes 1 one by one to complete the automatic loading of the connecting tubes 1, utilizes the pushing device B to push the connecting tube 1 on the conveying device A onto the positioning device C, and utilizes the positioning device C to position the pushed connecting tube 1, and then utilizes the lateral movement of the lateral movable device D to enable the punching device E to align with the positioned connecting tube 1 and complete the punching and reaming of the connecting tube 1. When the reaming of the connecting tube 1 is completed, the positioning device C is opened, and the pushing device B continues to push the new connecting tube 1. At this time, the new connecting tube 1 can push the punched and reamed connecting tube 1 away from the positioning device C and complete the unloading, so that the connecting tube 1 can realize automatic and continuous loading, reaming and unloading, so as to greatly improve the production efficiency. At the same time, the entire production process does not require manual participation, has a high safety factor, and can also effectively reduce the labor intensity and production cost of workers, and has strong practicality.

[0041] As a preferred solution of this embodiment, it may also have the following additional technical features:

[0042] The conveying device A includes a conveying bracket 3, a conveying belt 4, and a conveying driver 5, wherein the conveying bracket 3 is fixedly arranged on the punching table 2, and rotating wheels are rotatably arranged at both ends of the conveying bracket 3, the conveying belt 4 is wound around the rotating wheels at both ends, and the conveying driver 5 is fixedly arranged on the conveying bracket 3 or the punching table 2, and is drivingly connected to one of the rotating wheels.

[0043] The conveying driver 5 is a driving motor, which drives one of the rotating wheels to rotate during operation, thereby driving the conveying belt 4 to rotate between the rotating wheels at both ends to continue conveying the connecting pipe 1 conveyed by the vibrating feeding tray.

[0044] The pushing device B includes a pushing drive 6, a pushing slider 7, and a pushing piece 8, wherein the pushing drive 6 is located on one side of the conveyor belt 4 and is fixedly set on the punching table 2, the pushing drive 6 is drivingly connected to the pushing piece 8, the pushing slider 7 is fixedly set on the punching table 2, the pushing piece 8 slides on the pushing slider 7 through the drive of the pushing drive 6, and reciprocates on one side of the conveyor belt 4 while sliding, and pushes the connecting pipes 1 on the conveyor belt 4 one by one onto the positioning device C.

[0045] In this embodiment, the pushing drive 6 is a driving cylinder, which drives the pushing member 8 to slide back and forth on the pushing slider 7 when working. The reciprocating sliding direction of the pushing member 8 is perpendicular to the conveying direction of the connecting pipe 1. When the pushing member 8 slides back and forth, the connecting pipes 1 on the conveying belt 4 are pushed one by one onto the positioning device C.

[0046] The positioning device C includes a positioning block 9, a fixed die base 10, a movable die base 11, and a die base driver 12, wherein the positioning block 9 is located on the other side of the conveyor belt 4 and is fixedly set on the punching table 2, a die base movable groove 13 is set on the positioning block 9, the fixed die base 10 is fixedly set on one side of the die base movable groove 13, the die base driver 12 is located on the other side of the die base movable groove 13 and is fixedly set on the punching table 2, the die base driver 12 is connected to the movable die base 11 by driving, and the movable die base 11 slides on the other side of the die base movable groove 13 through the drive of the die base driver 12, and approaches or moves away from the fixed die base 10 when sliding, so as to realize the opening and closing between the movable die base 11 and the fixed die base 10.

[0047] In this embodiment, the mold base driver 12 is a driving cylinder, which drives the movable mold base 11 to slide back and forth in the mold base movable groove 13 when working. The reciprocating sliding direction of the movable mold base 11 is parallel to the conveying direction of the connecting pipe 1. The movable mold base 11 approaches or moves away from the fixed mold base 10 when sliding back and forth, so that the movable mold base 11 and the fixed mold base 10 are opened or closed.

[0048] A connecting pipe movable groove 14 is provided on the positioning block 9, and the connecting pipe movable groove 14 and the mold base movable groove 13 are perpendicular to and connected to each other. The pushing piece 8 pushes the connecting pipe 1 to the connecting point of the connecting pipe movable groove 14 and the mold base movable groove 13. When the movable mold base 11 and the fixed mold base 10 are close to each other, the connecting pipe 1 at the connecting point of the connecting pipe movable groove 14 and the mold base movable groove 13 is fixed.

[0049] In this embodiment, the direction in which the movable groove 14 of the connecting tube is set is perpendicular to the conveying direction of the connecting tube 1, and the direction in which the movable groove 13 of the mold base is set is parallel to the conveying direction of the connecting tube 1. At the same time, the movable groove 14 of the connecting tube is connected and matched with the movable groove 13 of the mold base in a cross shape.

[0050] When the movable die base 11 and the fixed die base 10 are opened, the pusher 8 pushes the connecting tube 1 from one side of the connecting tube movable groove 14 to the connecting point between the connecting tube movable groove 14 and the die base movable groove 13, and then the movable die base 11 and the fixed die base 10 are closed and the connecting tube 1 is fixed, and the stamping device E can stamp and expand the connecting tube 1.

[0051] In addition, since the movable mold base 11 and the fixed mold base 10 can be relatively movable on the movable groove 14 of the connecting pipe, the problem of the two swinging when moving can be avoided, thereby ensuring the effective fixation of the connecting pipe 1.

[0052] The positioning block 9 is provided with an ejecting elastic member for automatically ejecting the connecting pipe 1 , and the ejecting elastic member is located at the connecting portion between the connecting pipe movable groove 14 and the mold base movable groove 13 .

[0053] In this embodiment, a pushing elastic member is used to push the connecting tube 1 after the hole is expanded to avoid the problem that the connecting tube 1 is fixed at the connection point between the connecting tube movable groove 14 and the mold base movable groove 13 due to the punching of the punching device E, causing the connecting tube 1 after the hole is expanded to be unable to be unloaded.

[0054] A micro-push driver 15 is also provided on the stamping table 2 or the positioning block 9. The micro-push driver 15 is located on one side of the fixed mold base 10 or the movable mold base 11 and is fixedly provided on the stamping table 2 or the positioning block 9 along the axis of the movable groove 13 of the mold base. The micro-push driver 15 is driven and connected to a micro-push member 16. The micro-push member 16 is driven and retracted on the fixed mold base 10 or the movable mold base 11 by the micro-push driver 15, and slightly pushes the connecting pipe 1 when retracting. A collecting tray is also provided on the outside of the positioning block 9.

[0055] In this embodiment, the micro-push driver 15 is a driving cylinder, which is located on one side of the fixed die base 10 and fixedly set on the stamping table 2. When working, it drives the micro-push member 16 to retract and extend on the through hole set on the fixed die base 10 to slightly push the expanded connecting tube 1, so that the expanded connecting tube 1 is separated from the fixed die base 10 and the movable die base 11, so as to avoid the problem that the expanded connecting tube 1 cannot be unloaded due to the closure of the fixed die base 10 and the movable die base 11, resulting in the connection tube 1 being fixed at the connection point of the connecting tube movable groove 14 and the die base movable groove 13.

[0056] The collecting tray is located outside the connecting tube movable groove 14. When the pushing member 8 pushes the new connecting tube 1 from one side of the connecting tube movable groove 14 to the connecting tube movable groove 14 and the connecting tube movable groove 13, the new connecting tube 1 will push the expanded connecting tube 1 to the other side of the connecting tube movable groove 14. At this time, the expanded connecting tube 1 is automatically unloaded to the collecting tray and automatically collected.

[0057] A vertical plate 17 is fixedly provided on the punching table 2, and a transverse movable device D includes a transverse driver 18, a screw rod 19, an adapter block 20, a transverse sliding block 21, and a transverse movable plate 22, wherein the transverse driver 18 is fixedly provided on the vertical plate 17 and is drivingly connected to the screw rod 19, two adapter blocks 20 are provided, and are fixed on the vertical plate 17 at intervals along the conveying direction of the connecting tube 1, the screw rod 19 is driven to rotate between the two adapter blocks 20 by the transverse driver 18, and drives the transverse sliding block 21 to perform transverse reciprocating motion along the conveying direction of the connecting tube 1, a transverse slide rail 23 is provided on the vertical plate 17, the transverse movable plate 22 is fixedly connected to the transverse sliding block 21, and a transverse slider 24 is provided thereon, and the transverse slider 24 and the transverse slide rail 23 slide in cooperation with each other.

[0058] In this embodiment, the transverse driver 18 is a servo drive motor, which drives the screw rod 19 to rotate between the two adapter blocks 20 during operation. When the screw rod 19 rotates, it drives the transverse sliding block 21 to perform transverse reciprocating motion along the conveying direction of the connecting pipe 1, so that the transverse movable plate 22 can slide transversely and reciprocatingly on the vertical plate 17 through the cooperation of the transverse slider 24 and the transverse slide rail 23, thereby making the transverse position adjustment of the stamping device E more accurate.

[0059] The stamping device E includes a stamping driver, a longitudinal sliding block 25, a longitudinal guide rod 26, a guide rod fixing block 27, a stamping connecting plate 28, and a stamping movable plate 29, wherein two guide rod fixing blocks 27 are provided and are longitudinally fixed on the transverse movable plate 22, two longitudinal guide rods 26 are provided and are respectively fixed between the two transverse movable plates 22, the longitudinal sliding block 25 guides and slides on the two longitudinal guide rods 26, the stamping connecting plate 28 is fixed on the longitudinal sliding block 25 and is connected to the stamping driver, and the stamping movable plate 29 is cooperatively connected with the stamping connecting plate 28, and a stamping head is provided in the direction of the positioning block 9.

[0060] In this embodiment, the stamping driver is a hydraulic cylinder, which drives the stamping movable plate 29, the stamping connecting plate 28, and the longitudinal sliding block 25 to longitudinally guide and reciprocate on the longitudinal guide rod 26 during operation, so that the stamping head can stamp and expand the connecting pipe 1.

[0061] The stamping heads are provided with several different sizes, and several stamping heads are fixedly arranged at intervals at the bottom of the stamping movable plate 29 along the conveying direction of the connecting pipe 1. A stamping movable plate slider 30 is provided at the top of the stamping movable plate 29 along the conveying direction of the connecting pipe 1, and a stamping connecting plate sliding member 31 is provided at the bottom of the stamping connecting plate 28 along the conveying direction of the connecting pipe 1. The stamping connecting plate sliding member 31 and the stamping movable plate slider 30 slide in cooperation with each other.

[0062] In this embodiment, since the stamping movable plate 29 is provided with several different sizes along the conveying direction of the connecting tube 1, and the stamping movable plate 29 can slide back and forth on the stamping connecting plate 28 along the conveying direction of the connecting tube 1 through the cooperation of the stamping connecting plate sliding member 31 and the stamping movable plate sliding block 30, the user can adjust the stamping head of the corresponding size according to the different expansion hole sizes to avoid the problems of low work efficiency and cumbersome operation caused by replacing the stamping head, so as to improve the production efficiency and application range of the product. In addition, the stamping head can be adjusted horizontally and longitudinally relative to the connecting tube 1, and the working precision is high.

[0063] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An automatic hole expansion mechanism for a connecting pipe, comprising a punching station (2), characterized in that: It also comprises a vibrating feeding tray, which is located outside the punching table (2) and on which a plurality of connecting tubes (1) are placed, and which transports the connecting tubes (1) one by one to the punching table (2). The punching table (2) is provided with: The conveying device (A) has a feeding end connected to the discharging end of the vibrating feeding tray, A pushing device (B), which is located at one side of the discharge end of the conveying device (A) and reciprocates on the punching table (2), A positioning device (C), which is located on the other side of the discharge end of the conveying device (A) and is movable on the punching table (2). a transverse movable device (D), which is located above the conveying device (A) and moves transversely on the punching table (2), A punching device (E) is arranged on the transverse movable device (D) and moves longitudinally toward the positioning device (C).

2. The automatic hole expansion mechanism of the connecting pipe according to claim 1, characterized in that: The conveying device (A) comprises a conveying support (3), a conveying belt (4), and a conveying driver (5), wherein the conveying support (3) is fixedly arranged on the punching table (2), and rotating wheels are rotatably arranged at both ends of the conveying support, the conveying belt (4) is wound around the rotating wheels at both ends, and the conveying driver (5) is fixedly arranged on the conveying support (3) or the punching table (2), and is drivingly connected to one of the rotating wheels.

3. The automatic hole expansion mechanism of the connecting pipe according to claim 2, characterized in that: The pushing device (B) comprises a pushing drive (6), a pushing slider (7), and a pushing piece (8), wherein the pushing drive (6) is located on one side of the conveying belt (4) and is fixedly arranged on the punching table (2), the pushing drive (6) is drivingly connected to the pushing piece (8), the pushing slider (7) is fixedly arranged on the punching table (2), the pushing piece (8) is driven by the pushing drive (6) to slide on the pushing slider (7), and reciprocates on one side of the conveying belt (4) while sliding, and pushes the connecting pipes (1) on the conveying belt (4) one by one onto the positioning device (C).

4. The automatic hole expansion mechanism of the connecting pipe according to claim 3, characterized in that: The positioning device (C) comprises a positioning block (9), a fixed die base (10), a movable die base (11), and a die base driver (12), wherein the positioning block (9) is located on the other side of the conveyor belt (4) and is fixedly arranged on the punching table (2); a die base movable groove (13) is arranged on the positioning block (9); the fixed die base (10) is fixedly arranged on one side of the die base movable groove (13); the die base driver (12) is located on the other side of the die base movable groove (13) and is fixedly arranged on the punching table (2); the die base driver (12) is drivingly connected to the movable die base (11); the movable die base (11) is driven by the die base driver (12) to slide on the other side of the die base movable groove (13) and approaches or moves away from the fixed die base (10) when sliding, so as to realize the opening and closing between the movable die base (11) and the fixed die base (10).

5. The automatic hole expansion mechanism for the connecting pipe according to claim 4, characterized in that: The positioning block (9) is provided with a connecting pipe movable groove (14), the connecting pipe movable groove (14) and the mold base movable groove (13) are perpendicular to and connected to each other, the pushing member (8) pushes the connecting pipe (1) to the connecting point of the connecting pipe movable groove (14) and the mold base movable groove (13), and fixes the connecting pipe (1) at the connecting point of the connecting pipe movable groove (14) and the mold base movable groove (13) when the movable mold base (11) and the fixed mold base (10) are close to each other.

6. The automatic hole expansion mechanism for the connecting pipe according to claim 5, characterized in that: The positioning block (9) is provided with an ejecting elastic member for automatically ejecting the connecting tube (1), and the ejecting elastic member is located at the connection point between the connecting tube movable groove (14) and the mold base movable groove (13).

7. The automatic hole expansion mechanism for the connecting pipe according to claim 6, characterized in that: The punching table (2) or the positioning block (9) is also provided with a micro-push driver (15), the micro-push driver (15) is located on one side of the fixed die base (10) or the movable die base (11), and is fixedly provided on the punching table (2) or the positioning block (9) along the axis of the movable die base groove (13), the micro-push driver (15) is drivingly connected to a micro-push member (16), the micro-push member (16) is driven by the micro-push driver (15) to extend and retract on the fixed die base (10) or the movable die base (11), and slightly pushes the connecting tube (1) when extending and retracting, and a collecting tray is also provided on the outer side of the positioning block (9).

8. The automatic hole expansion mechanism for the connecting pipe according to claim 7, characterized in that: A vertical plate (17) is fixedly arranged on the punching table (2), and the transverse movable device (D) comprises a transverse driver (18), a screw rod (19), an adapter block (20), a transverse sliding block (21), and a transverse movable plate (22), wherein the transverse driver (18) is fixedly arranged on the vertical plate (17) and is drivingly connected to the screw rod (19), and two adapter blocks (20) are provided and are fixed on the vertical plate (17) at intervals along the conveying direction of the connecting pipe (1). The screw rod (19) is driven by the transverse driver (18) to rotate between the two adapter blocks (20) and drive the transverse sliding block (21) to perform transverse reciprocating movement along the conveying direction of the connecting pipe (1). A transverse slide rail (23) is provided on the vertical plate (17). The transverse movable plate (22) is fixedly connected to the transverse sliding block (21) and is provided with a transverse slider (24). The transverse slider (24) and the transverse slide rail (23) are slidably matched with each other.

9. The automatic hole expansion mechanism for the connecting pipe according to claim 8, characterized in that: The punching device (E) comprises a punching driver, a longitudinal sliding block (25), a longitudinal guide rod (26), a guide rod fixing block (27), a punching connection plate (28), and a punching movable plate (29), wherein two guide rod fixing blocks (27) are provided and are longitudinally fixed on the transverse movable plate (22), two longitudinal guide rods (26) are provided and are respectively fixed between the two transverse movable plates (22), the longitudinal sliding block (25) guides and slides on the two longitudinal guide rods (26), the punching connection plate (28) is fixed on the longitudinal sliding block (25) and is connected to the punching driver, and the punching movable plate (29) is connected to the punching connection plate (28) and is provided with a punching head in the direction of the positioning block (9).

10. The automatic hole expansion mechanism of the connecting pipe according to claim 9, characterized in that: The punching heads are provided with a plurality of different sizes, and a plurality of the punching heads are fixedly arranged at intervals at the bottom of the punching movable plate (29) along the conveying direction of the connecting tube (1); a punching movable plate slider (30) is provided at the top of the punching movable plate (29) along the conveying direction of the connecting tube (1); a punching connecting plate sliding member (31) is provided at the bottom of the punching connecting plate (28) along the conveying direction of the connecting tube (1); the punching connecting plate sliding member (31) and the punching movable plate slider (30) are slidably matched with each other.

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