CN220426509U - Aluminum pipe upsetting ring punching device - Google Patents

Abstract

The utility model discloses an aluminum pipe upsetting ring punching device, which comprises a right pipe clamping mechanism for clamping the right part of an aluminum pipe and a left pipe clamping mechanism for clamping the left part of the aluminum pipe, wherein the left pipe clamping mechanism comprises a left lower clamp and a left upper clamp, the left lower clamp is in relative up-down sliding connection with the left upper clamp, and a positioning hole is formed in the left upper clamp; the punching mechanism comprises punching needles which are adapted to be arranged in corresponding positioning holes in a sliding manner up and down, a clamping groove for contacting the outer wall of the aluminum pipe is formed in the upper part of the left lower clamp, an inner supporting shaft for being inserted into the left part of the aluminum pipe relatively is arranged in the clamping groove, and an avoidance hole for avoiding the punching needles is formed in the right end of the inner supporting shaft; the upsetting ring driving mechanism is used for driving the left lower clamp and the left upper clamp to move in the left-right direction. The aluminum pipe upsetting ring punching device is beneficial to improving the working efficiency and the processing quality.

Description

Aluminum pipe upsetting ring punching device

Technical Field

The utility model relates to the field of aluminum pipe machining equipment of refrigeration systems, in particular to an aluminum pipe upsetting ring punching device.

Background

At present, in the technical field of refrigeration systems, an aluminum pipe is used for conveying a refrigerant, a convex ring is required to be formed at the end part of the aluminum pipe in a splicing structure of the aluminum pipe, the convex ring plays an axial positioning role in splicing the aluminum pipe, the convex ring is formed by machining by upsetting ring equipment, the principle is that one end of the aluminum pipe is inserted into a die hole capable of axially supporting the aluminum pipe, then the other end of the aluminum pipe is axially pushed and pressed, the aluminum pipe is subjected to local collapse plastic deformation under the condition of large axial force, a wall body, which is positioned outside an orifice of the die hole, of the aluminum pipe is outwards bulged to form the convex ring, a single-side hole for connecting the oil pipe is required to be machined on the aluminum pipe, the convex ring is firstly machined on the upsetting ring equipment, and then a worker takes the aluminum pipe to a bench drill to machine the single-side hole, so that the working efficiency is relatively low, and improvement is required.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides an aluminum pipe upsetting ring punching device which is beneficial to improving the working efficiency.

The aim of the utility model is achieved by the following technical scheme.

The utility model discloses an aluminum pipe upsetting ring punching device, which comprises a right pipe clamping mechanism for clamping the right part of an aluminum pipe and a left pipe clamping mechanism for clamping the left part of the aluminum pipe, wherein the left pipe clamping mechanism comprises a left lower clamp and a left upper clamp, the left lower clamp is in relative up-down sliding connection with the left upper clamp, and a positioning hole is formed in the left upper clamp; the punching mechanism comprises punching needles, the punching needles are arranged in the corresponding positioning holes in a sliding manner in an adapting manner, a clamping groove used for contacting the outer wall of the aluminum pipe is formed in the upper part of the left lower clamp, an inner supporting shaft used for being inserted into the left part of the aluminum pipe relatively is arranged in the clamping groove, and an avoidance hole used for avoiding the punching needles is formed in the right end of the inner supporting shaft; the upsetting ring driving mechanism is used for driving the left lower clamp and the left upper clamp to move in the left-right direction.

Preferably, the punching mechanism comprises a needle seat and a punching oil cylinder, the punching oil cylinder drives the needle seat to move up and down, a needle head is formed at the lower end of the punching needle, a needle tail hanging head is formed at the upper end of the punching needle, a T-shaped groove extending in the left-right direction is formed at the lower part of the needle seat, and the needle tail hanging head is suitably arranged in the corresponding T-shaped groove.

Preferably, the aluminum pipe upsetting ring punching device further comprises a workbench, the upsetting ring driving mechanism comprises an upsetting ring oil cylinder and a sliding plate, the sliding plate is connected to the workbench in a sliding mode, the upsetting ring oil cylinder is connected with the sliding plate in a driving mode, the left lower clamp is mounted on the sliding plate, the right pipe clamping mechanism comprises a right lower clamp, a right upper clamp and a right clamp oil cylinder, the right lower clamp is fixedly mounted on the workbench, and the right clamp oil cylinder drives the right upper clamp to move up and down.

Preferably, the left pipe clamping mechanism comprises a left clamping cylinder, a pressing arm, a pressing block and a reset spring, wherein a hinged support is arranged on the sliding plate, the left end of the pressing arm is hinged with the upper end of the hinged support, the pressing block is arranged on a piston rod of the left clamping cylinder, the lower end of the pressing block is attached to the upper side of the pressing arm, the right end of the pressing arm is attached to the upper side of the middle of the upper left clamp, and the reset spring is arranged between the lower left clamp and the upper left clamp.

Preferably, the punching mechanism comprises an inner supporting shaft seat, the inner supporting shaft seat is mounted on the sliding plate, the left end of the upper left clamp is connected to the right side face of the inner supporting shaft seat in an abutting mode, the left end of the inner supporting shaft is formed with a circumferential positioning flat square, the inner supporting shaft is provided with an axial positioning step used for blocking the left end face of the aluminum pipe, the inner supporting shaft seat is formed with a D-shaped hole and a screw hole, the screw hole is perpendicular to the D-shaped hole, the left end of the inner supporting shaft is inserted in the corresponding D-shaped hole in an adapting mode, a set screw is mounted in the screw hole, and the lower end of the set screw is connected to the circumferential positioning flat square in an abutting mode.

Compared with the prior art, the utility model has the beneficial effects that: through setting up the right clamp pipe mechanism that is used for the right part of centre gripping aluminum pipe and the left clamp pipe mechanism that is used for the left part of centre gripping aluminum pipe, left clamp pipe mechanism includes left lower clamp and left upper clamp, left lower clamp and left upper clamp relatively upper and lower sliding connection, left upper clamp is formed with the locating hole, set up the mechanism that punches a hole that is used for radially punching a hole on the aluminum pipe, punch a hole the mechanism including the needle that punches a hole, it locates in the locating hole that corresponds to slide about the needle adaptation that punches a hole, the upper portion of left lower clamp is formed with the draw-in groove that is used for contacting the outer wall of aluminum pipe, be equipped with in the draw-in groove and be used for inserting the interior axle that holds in the left part of aluminum pipe relatively, the right-hand member of interior axle is formed with the hole that dodges that is used for dodging the needle that punches a hole, set up the upset ring actuating mechanism that is used for driving left lower clamp and left upper clamp and right direction to move, make upset ring and two processes of punching a hole can be connected together organically, make an aluminum pipe clamping can accomplish two processes, thereby work efficiency has obtained very big improvement.

Drawings

Fig. 1 is a schematic perspective view of a punching device for upsetting rings.

Fig. 2 is a schematic sectional partial structure of the upsetting ring punching device of the present utility model.

Fig. 3 is a schematic view of a partial structure at a in fig. 2.

Fig. 4 is a schematic view of a partial perspective structure of a punching device for a header ring of the present utility model.

Fig. 5 is a right side perspective view of the combination of the left lower clip, the left upper clip, the inner support shaft, the punching needle, the needle seat and the inner support shaft seat of the present utility model.

Fig. 6 is a schematic top perspective view of the combination of the inner support shaft seat and the inner support shaft of the present utility model.

Fig. 7 is a schematic bottom perspective view of the left upper clip of the present utility model.

Fig. 8 is a schematic perspective view of a punching needle of the present utility model.

Fig. 9 is a schematic perspective view of the needle holder of the present utility model.

Fig. 10 is a schematic perspective view of an inner support shaft according to the present utility model.

Fig. 11 is a schematic perspective view of an inner support shaft seat according to the present utility model.

Description of the reference numerals: a right pipe clamping mechanism 1; a right lower clip 11; an upper right clip 12; a right clamp cylinder 13; a left pipe clamping mechanism 2; a left lower clip 21; a clip groove 211; upper left clip 22; positioning hole 2201; a left clamp cylinder 23; a pressing arm 24; a briquette 25; a return spring 26; a punching mechanism 3; a punching needle 31; a needle 311; a needle tail hanging head 312; a needle holder 32; a T-shaped slot 321; a punching cylinder 33; an inner support shaft 34; a relief hole 3401; circumferentially positioning a flat square 3402; an axial positioning step 341; an inner support shaft seat 35; d-shaped aperture 3501; screw holes 3502; a heading ring driving mechanism 4; a header ring cylinder 41; a slide plate 42; a hinge support 421; a work table 5; a mounting plate 6; an aluminum pipe 99; a collar 991.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The aluminum pipe upsetting ring punching device of the utility model, as shown in fig. 1 to 5, comprises a right pipe clamping mechanism 1 for clamping the right part of an aluminum pipe 99, and a left pipe clamping mechanism 2 for clamping the left part of the aluminum pipe 99, wherein the left pipe clamping mechanism 2 comprises a left lower clamp 21 and a left upper clamp 22, as shown in fig. 4, the left lower clamp 21 and the left upper clamp 22 are in sliding connection relatively up and down, specifically, the left lower clamp 21 and the left upper clamp 22 are in sliding connection through two upright guide posts, so that the left upper clamp 22 is limited to move up and down relatively to the left lower clamp 21, and a positioning hole 2201 is formed in the left upper clamp 22 as shown in fig. 7. As shown in fig. 1 to 5, the aluminum pipe upsetting ring punching device of the utility model further comprises a punching mechanism 3 for radially punching on the aluminum pipe 99, the punching mechanism 3 comprises punching pins 31, as shown in fig. 3, the punching pins 31 are adapted to be arranged in corresponding positioning holes 2201 in a sliding manner up and down, as shown in fig. 5, a clamping groove 211 for contacting the outer wall of the aluminum pipe 99 is formed at the upper part of the left lower clamp 21, an inner supporting shaft 34 for being relatively inserted into the left part of the aluminum pipe 99 is arranged in the clamping groove 211, the axis of the inner supporting shaft 34 is arranged to extend along the left-right direction, and a avoiding hole 3401 for avoiding the punching pins 31 is formed at the right end of the inner supporting shaft 34, as shown in fig. 6 and 10. As shown in fig. 1 to 5, the aluminum pipe upsetting ring punching device of the utility model further includes an upsetting ring driving mechanism 4 for driving the left lower clamp 21 and the left upper clamp 22 to move in the left-right direction.

The working principle of the utility model is briefly described below: as shown in fig. 1 to 5, the left portion of the aluminum pipe 99 is inserted into the grip groove 211 and the left portion of the aluminum pipe 99 is fitted to the outside of the inner stay shaft 34 with the wall of the lower portion of the left portion of the aluminum pipe 99 being located between the outer wall of the inner stay shaft 34 and the inner wall of the grip groove 211, then the right grip mechanism 1 is caused to grip the right portion of the aluminum pipe 99, then the left grip mechanism 2 is caused to grip the left portion of the aluminum pipe 99, that is, the upper left grip 22 is moved downward to grip with the lower left grip 21, and when the upper left grip 22 is moved downward, the punching needle 31 slides relatively in the positioning hole 2201, then the upper left grip 22 and the lower left grip 21 are driven by the upsetting ring driving mechanism 4 to move rightward at a relatively slow speed, so that the left portion of the aluminum pipe 99 is moved rightward with respect to the right portion of the aluminum pipe 99, as shown in fig. 3, so that the partial wall of the aluminum pipe 99 located on the right side of the lower left grip 21 is caused to be plastically deformed to bulge outward to form the bulge loop 991, then the punching mechanism 3 makes the punching needle 31 move downwards at a faster speed, the lower end of the punching needle 31 penetrates the upper part of the aluminum pipe 99 along the radial direction of the aluminum pipe 99, the lower end of the punching needle 31 is then inserted into the avoidance hole 3401 of the inner supporting shaft 34 to avoid the collision of the punching needle 31 with the inner supporting shaft 34, then the punching mechanism 3 makes the punching needle 31 move upwards to reset, the inner wall of the left part of the aluminum pipe 99 is supported by the inner supporting shaft 34 to avoid the concave of the wall of the aluminum pipe 99 during punching, the punching needle 31 is also beneficial to easily punching holes on the aluminum pipe 99, the right pipe clamping mechanism 1 releases the right part of the aluminum pipe 99 (i.e. the right pipe clamping mechanism 1 resets), the upsetting ring driving mechanism 4 drives the left upper clamp 22 and the left lower clamp 21 to move leftwards to reset, the left pipe clamping mechanism 2 releases the left part of the aluminum pipe 99 (i.e. the left pipe clamping mechanism 2 resets), the aluminum pipe 99 is then continuously and rapidly machined to form the boss 991 and the single-sided hole (i.e., without diametrically extending through the aluminum pipe 99), and then the worker removes the aluminum pipe 99 with the machined boss 991 and single-sided hole rightward from the aluminum pipe upsetting ring punching device of the present utility model. The punching needle 31 is arranged in the corresponding positioning hole 2201 in a vertically sliding manner, so that the two working procedures of upsetting and punching are organically connected together, the two working procedures of upsetting and punching can be completed by clamping the aluminum pipe 99 once, and the working efficiency is greatly improved; and because the clamping times are relatively reduced, the punching position is stable, and the processing quality is improved.

Further, as shown in fig. 1 to 3, the punching mechanism 3 includes a needle seat 32 and a punching cylinder 33, the punching cylinder 33 drives the needle seat 32 to move up and down, specifically, as shown in fig. 1, a mounting plate 6 is disposed above the workbench 5, the mounting plate 6 is fixedly connected with the workbench 5 through four upright posts, a cylinder body of the punching cylinder 33 is mounted on the mounting plate 6, as shown in fig. 2 and 3, the needle seat 32 is mounted at a lower end of a piston rod of the punching cylinder 33, a sliding column is fixedly connected at a rear portion of the needle seat 32, a guide sleeve is mounted on the mounting plate 6, the sliding column is adapted to be slidingly connected in the guide sleeve, so that the needle seat 32 can move up and down in a straight line, as shown in fig. 8, a needle 311 is formed at a lower end of the punching needle 31, specifically, a needle 311 penetrates through an aluminum pipe 99, a needle tail hanging head 312 is formed at an upper end of the punching needle 31, as shown in fig. 9, a T-shaped groove 321 extending in a left-right direction is formed at a lower portion of the needle seat 32, as shown in fig. 5, and the needle tail hanging head 312 is adapted to be disposed in the corresponding T-shaped groove 321. Then when the upsetting ring driving mechanism 4 drives the left lower clamp 21 and the left upper clamp 22 to move rightwards, the left upper clamp 22 drives the punching needle 31 to synchronously move rightwards by a small extent, so that the needle tail hanging head 312 slides rightwards in the corresponding T-shaped groove 321, when the piston rod of the punching oil cylinder 33 moves downwards, the needle seat 32 can drive the punching needle 31 to move downwards through the T-shaped groove 321 to execute a punching process, and when the punching is finished, the upsetting ring driving mechanism 4 drives the left lower clamp 21 and the left upper clamp 22 to move leftwards for resetting, and similarly, the needle tail hanging head 312 slides leftwards in the corresponding T-shaped groove 321. Through setting up the tail of a needle and hanging first 312 and being fit for disposing in corresponding T type groove 321, the effect that punching pin 31 and punching cylinder 33 can relative horizontal displacement has been realized to simple structure for upsetting ring and punching process can realize good connection. For example, the ram 33 is an adjustable stroke ram that prevents the ram needle 31 from penetrating the aluminum tube 99.

Further, as shown in fig. 1, the aluminum pipe upsetting ring punching device of the utility model further comprises a workbench 5, as shown in fig. 1 and 2, the upsetting ring driving mechanism 4 comprises an upsetting ring oil cylinder 41 and a sliding plate 42, the sliding plate 42 is connected to the workbench 5 in a sliding manner through a linear guide rail pair, so that the sliding plate 42 can move left and right with high rigidity, the upsetting ring oil cylinder 41 drives and connects with the sliding plate 42, particularly, a piston rod of the upsetting ring oil cylinder 41 is connected with the left part of the sliding plate 42, the left lower clamp 21 is arranged on the sliding plate 42, and then the piston rod of the upsetting ring oil cylinder 41 can drive the left lower clamp 21 to move left and right. As shown in fig. 2, the right tube clamping mechanism 1 comprises a right lower clamp 11, a right upper clamp 12 and a right clamp cylinder 13, wherein the right lower clamp 11 is fixedly arranged on the workbench 5, the right clamp cylinder 13 drives the right upper clamp 12 to move up and down, a cylinder body of the right clamp cylinder 13 is arranged on the mounting plate 6, the right upper clamp 12 is arranged on a piston rod of the right clamp cylinder 13, a groove with an upward opening and a semicircular cross section is formed at the upper part of the right lower clamp 11, a groove with a downward opening and a semicircular cross section is formed at the lower part of the right upper clamp 12, so that when the aluminum tube 99 is correspondingly clamped in the groove of the right lower clamp 11 and the groove of the right upper clamp 12, the right part of the aluminum tube 99 can be stably stationary, which is beneficial to the progress of a upsetting ring procedure, and similarly, as shown in fig. 5, the cross section of the clamp groove 211 is semicircular, as shown in fig. 7, the semicircular cross section groove is formed at the lower part of the left upper clamp 22, and is used for contacting the outer wall of the left part of the aluminum tube 99.

Further, as shown in fig. 1 to 5, the left pipe clamping mechanism 2 includes a left clamping cylinder 23, a pressing arm 24, a pressing block 25 and a return spring 26, a hinge support 421 is mounted on the sliding plate 42, the left end of the pressing arm 24 is hinged with the upper end of the hinge support 421, the pressing block 25 is mounted on a piston rod of the left clamping cylinder 23, a cylinder body of the left clamping cylinder 23 is mounted on the mounting plate 6, the lower end of the pressing block 25 is closely connected to the upper side of the pressing arm 24, the right end of the pressing arm 24 is closely connected to the upper middle of the left upper clamp 22, as shown in fig. 4, the return spring 26 is disposed between the left lower clamp 21 and the left upper clamp 22 (note that only the return spring 26 is schematically drawn in fig. 4), and the return spring 26 can be sleeved outside the guide pillar described above; when the piston rod of the left clamp cylinder 23 moves downward, the pressing block 25 pushes the arm 24 downward, so that the right part of the pressing arm 24 swings downward, the right end of the pressing arm 24 pushes down the upper left clamp 22, so that the upper left clamp 22 is clamped with the lower left clamp 21, and when the piston rod of the left clamp cylinder 23 moves upward, the pressing arm 24 loses the pushing force of the pressing block 25, the upper left clamp 22 moves upward to reset under the pushing force of the elastic restoring force of the restoring spring 26, and in the process, the upper left clamp 22 pushes the arm 24 upward, so that the pressing arm 24 swings to reset. As shown in fig. 2, the left clamp cylinder 23 and the punching cylinder 33 are arranged side by side, in order to allow the punching cylinder 33 to provide a sufficient pressing force to the punching needle 31, and in order to allow the upper left clamp 22 to clamp the left portion of the aluminum pipe 99 with the lower left clamp 21, the cylinder diameter of the left clamp cylinder 23 and the cylinder diameter of the punching cylinder 33 are set so as to be large, so that it is difficult for the piston rod of the left clamp cylinder 23 and the piston rod of the punching cylinder 33 to be arranged directly above the upper left clamp 22 at the same time, and as shown in fig. 3, the structure in which the upper left clamp 22 is pushed to clamp by the pressing arm 24 is provided, so that the right end of the pressing arm 24 can extend rightward and can contact the middle position of the upper left clamp 22 in the right-left direction, which is favorable for uniformly distributing the clamping force of the upper left clamp 22 to the aluminum pipe 99 in the right-left direction, and favorable for clamping the aluminum pipe 99 reliably.

Further, as shown in fig. 3, the punching mechanism 3 comprises an inner support shaft seat 35, the inner support shaft seat 35 is mounted on the sliding plate 42, the left end of the left upper clamp 22 is attached to the right side surface of the inner support shaft seat 35, so that the inner support shaft seat 35 orients the left upper clamp 22 to avoid the horizontal steering of the left upper clamp 22, as shown in fig. 10, the left end part of the inner support shaft 34 is formed with a circumferential positioning flat 3402, as shown in fig. 10, the inner support shaft 34 is formed with an axial positioning step 341 for blocking the left end surface of the aluminum pipe 99, as shown in fig. 11, the inner support shaft seat 35 is formed with a D-shaped hole 3501 and a screw hole 3502, the screw hole 3502 is perpendicular to the D-shaped hole 3501, the edge of the section of the D-shaped hole 3501 is a combination of major arc and chord, as shown in fig. 6, the left end part of the inner support shaft 34 is fit and inserted into the corresponding D-shaped hole 3501, the screw holes 3502 are internally provided with fastening screws, the lower ends of the fastening screws are attached to the connecting circumferential positioning flat sides 3402, that is, the circumferential positioning flat sides 3402 are attached to the chords of the cross sections of the D-shaped holes 3501, so that the inner support shafts 34 are prevented from rotating, avoiding the offset of the avoidance holes 3401 and the needle heads 311, the inner support shafts 34 and the inner support shaft seats 35 are simply fixedly arranged, the inner support shafts 34 are arranged at equal intervals in the front-rear direction, and correspondingly, the punching needles 31 are also arranged at equal intervals in the front-rear direction, and therefore, the aluminum pipe upsetting ring punching device disclosed by the utility model can simultaneously clamp a plurality of aluminum pipes 99 and process the aluminum pipes 99, and is beneficial to improving the working efficiency. When the upsetting ring driving mechanism 4 performs the upsetting ring process, the axial positioning step 341 pushes the left end face of the aluminum pipe 99, and the left part of the aluminum pipe 99 is prevented from axially slipping with the left lower clamp 21 and the left upper clamp 22 by combining the clamping action of the left lower clamp 21 and the left upper clamp 22 on the left part of the aluminum pipe 99, so that the upsetting ring process is further facilitated.

Claims (5)

1. An aluminum pipe upsetting ring punching device which is characterized in that: the aluminum pipe clamping device comprises a right pipe clamping mechanism (1) used for clamping the right part of an aluminum pipe (99) and a left pipe clamping mechanism (2) used for clamping the left part of the aluminum pipe (99), wherein the left pipe clamping mechanism (2) comprises a left lower clamp (21) and a left upper clamp (22), the left lower clamp (21) is in relative up-down sliding connection with the left upper clamp (22), and a positioning hole (2201) is formed in the left upper clamp (22); the aluminum pipe punching device comprises an aluminum pipe (99), and is characterized by further comprising a punching mechanism (3) for radially punching the aluminum pipe (99), wherein the punching mechanism (3) comprises a punching needle (31), the punching needle (31) is arranged in a corresponding positioning hole (2201) in a sliding manner in an adapting manner, a clamping groove (211) for contacting the outer wall of the aluminum pipe (99) is formed in the upper part of the left lower clamp (21), an inner supporting shaft (34) for being relatively inserted into the left part of the aluminum pipe (99) is arranged in the clamping groove (211), and an avoidance hole (3401) for avoiding the punching needle (31) is formed in the right end of the inner supporting shaft (34); the device also comprises a upsetting ring driving mechanism (4) for driving the left lower clamp (21) and the left upper clamp (22) to move in the left-right direction.

2. The aluminum pipe upsetting ring punching device as recited in claim 1, wherein: the punching mechanism (3) comprises a needle seat (32) and a punching oil cylinder (33), the punching oil cylinder (33) drives the needle seat (32) to move up and down, a needle head (311) is formed at the lower end of the punching needle (31), a needle tail hanging head (312) is formed at the upper end of the punching needle (31), a T-shaped groove (321) extending in the left-right direction is formed at the lower part of the needle seat (32), and the needle tail hanging head (312) is suitable for being arranged in the corresponding T-shaped groove (321).

3. The aluminum pipe upsetting ring punching device as recited in claim 2, wherein: still include workstation (5), upset ring actuating mechanism (4) include upset ring hydro-cylinder (41) and slide (42), slide (42) sliding connection in on workstation (5), upset ring hydro-cylinder (41) drive connection slide (42), left side down press from both sides (21) and install on slide (42), right side presss from both sides tub mechanism (1) including right down press from both sides (11), right side up press from both sides (12) and right clamp hydro-cylinder (13), right side down press from both sides (11) fixed mounting be in on workstation (5), right side press from both sides hydro-cylinder (13) drive right side up press from both sides (12) reciprocates.

4. An aluminum pipe upsetting ring punching device as recited in claim 3, further characterized in that: the left pipe clamping mechanism (2) comprises a left clamping cylinder (23), a pressing arm (24), a pressing block (25) and a return spring (26), wherein a hinged support (421) is arranged on a sliding plate (42), the left end of the pressing arm (24) is hinged to the upper end of the hinged support (421), the pressing block (25) is arranged on a piston rod of the left clamping cylinder (23), the lower end of the pressing block (25) is attached to the upper side of the pressing arm (24), the right end of the pressing arm (24) is attached to the upper side of the middle of an upper left clamp (22), and the return spring (26) is arranged between the lower left clamp (21) and the upper left clamp (22).

5. An aluminum pipe upsetting ring punching device as recited in claim 4, further characterized in that: the punching mechanism (3) comprises an inner supporting shaft seat (35), the inner supporting shaft seat (35) is arranged on the sliding plate (42), the left end of the upper left clamp (22) is attached to the right side face of the inner supporting shaft seat (35), a circumferential positioning flat square (3402) is formed at the left end part of the inner supporting shaft (34), an axial positioning step (341) for blocking the left end face of an aluminum pipe (99) is formed on the inner supporting shaft (34), a D-shaped hole (3501) and a screw hole (3502) are formed in the inner supporting shaft seat (35), the screw hole (3502) is perpendicular to the D-shaped hole (3501), the left end part of the inner supporting shaft (34) is inserted into the corresponding D-shaped hole (3501) in a fit mode, a fastening screw is arranged in the screw hole (3502), and the lower end of the fastening screw is attached to the circumferential positioning flat square (3402).