CN217343210U

CN217343210U - Barrel flanging device that punches a hole

Info

Publication number: CN217343210U
Application number: CN202221843452.2U
Authority: CN
Inventors: 王扬扬; 杨波; 王璟琦; 李凤娟
Original assignee: Airui Chengdu Emission Control Technology Co ltd
Current assignee: Airui Chengdu Emission Control Technology Co ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-09-02
Anticipated expiration: 2032-07-18

Abstract

The utility model relates to a barrel punching and flanging device, which comprises a base; the upper die assembly comprises an upper die base, a punching die assembly is fixed below the upper die base and provided with a punching male die which protrudes downwards, a flanging female die which can float up and down is arranged at the lower end of the punching die assembly, the punching male die is in clearance fit in a flanging female die hole of the flanging female die, and the length of the punching male die is greater than the depth of the flanging female die hole; the lower die assembly is provided with a supporting arm which is transversely arranged below the lower die assembly, the first end parts of the two supporting arms extending out of the space below the lower die assembly are installed on the base through a supporting seat, the supporting arm is provided with a lower flanging male die which can be inserted into the upper flanging female die hole, and the top of the lower flanging male die is provided with a punching female die hole for inserting the punching male die.

Description

Barrel flanging device that punches a hole

Technical Field

The utility model relates to a former, concretely relates to barrel flanging device that punches a hole.

Background

The silencer barrel is of a circumferentially closed barrel structure, a flanging hole is required to be formed in the side face of the silencer barrel and used for connecting a pipeline, in a conventional machining mode, a punching process is usually achieved through a punching die, then the punched barrel is clamped on the flanging die to perform flanging operation, and flanging of opposite punching orifice edges is achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at prior art not enough, provide a barrel flanging device that punches a hole, it can solve among the traditional shaping mode barrel machining precision low, work efficiency low and defect such as with high costs.

The purpose of the utility model is realized like this: the utility model provides a barrel flanging device that punches a hole, includes: a base;

the upper die assembly comprises an upper die base, the upper die base is fixed with a die assembly, the die assembly is provided with a punching male die which protrudes downwards, the lower end of the die assembly is provided with a flanging female die which can float up and down, the punching male die is in clearance fit in a flanging female die hole of the flanging female die, and the length of the punching male die is greater than the depth of the flanging female die hole;

the lower die assembly is provided with a supporting arm which is transversely arranged below the lower die assembly, the first end parts of the two supporting arms, extending out of the space below the lower die assembly, are installed on the base through a supporting seat, the supporting arm is provided with a lower flanging male die which can be inserted into an upper flanging female die hole, the top of the lower flanging male die is provided with a punching female die hole for inserting the punching male die, the supporting arm is provided with a material pressing piece which can float up and down, and the material pressing piece is provided with a through hole for the lower flanging male die to pass through;

the supporting arms penetrate through the space between the two supporting seats, and the supporting seats are connected with the upper die base through the die assembly guide post.

And a jacking assembly is arranged below the supporting arm, the jacking assembly is provided with a connecting rod capable of extending downwards, and the lower end of the connecting rod is provided with a jacking block used for abutting against the inner wall of the barrel.

A gap is reserved between a second end part of the two end parts of the two ends of the supporting arm extending out of the lower space of the lower die assembly and the base, and a moving seat capable of laterally feeding or withdrawing is matched in the reserved gap.

The movable seat comprises a slide rail, the slide rail is fixed on a base, a supporting block is mounted on the slide rail, the lower foot end of the supporting block is in sliding fit with the slide rail, the upper end of the supporting block is provided with a sliding fit part for supporting the supporting arm, the movable seat further comprises a first driving device, the fixed end of the first driving device is fixedly connected with the base, and the driving end capable of moving linearly on the first driving device is connected with the supporting block.

One end of the pressing piece, which is close to the support, is fixed with a first limiting piece extending towards the first end of the supporting arm, the far end of the first limiting piece is provided with a first stop block which can be axially adjusted along the first limiting piece, and the first stop block is provided with a first limiting part extending upwards.

One end of the pressing part, which is far away from the support, is fixedly provided with a second limiting part extending away from the first end part of the supporting arm, the far end of the second limiting part is provided with a rotary clamping cylinder, the driving end of the rotary clamping cylinder is connected with the fixing part at the lower end of the second stop block, and the second stop block is provided with a second limiting part extending upwards.

The punching die component comprises an upper base plate fixed at the lower end of an upper die base, an upper die plate is fixed on the lower end face of the upper base plate, the upper die plate is provided with a downward mounting hole, a punching male die is mounted in the mounting hole, and a flanging female die is mounted at the lower end of the upper die plate.

The flanging die is characterized in that a first limiting pin extending upwards is fixedly arranged on the flanging die, the top end of the first limiting pin penetrates through a corresponding sliding hole in the upper die plate and extends into a containing hole of the upper backing plate, the containing hole and the sliding hole are in shoulder transition through a limiting hole, a first limiting step is arranged on the part, extending into the containing hole, of the first limiting pin, and a first elastic element is arranged between the flanging die and the upper die plate so that the flanging die has a downward movement trend.

The supporting arm is provided with a second limiting pin extending upwards, the second limiting pin extends upwards into a second stepped hole in the pressing piece, a second limiting step is arranged on a pin body of the second limiting pin extending into a large hole section of the second stepped hole through a small hole section of the second stepped hole, and a second elastic element is arranged between the supporting arm and the pressing piece so that the pressing piece has a tendency of moving upwards.

And the lower end of the lower flanging male die is provided with a step, and the mounting step is fixedly connected with the supporting arm through a screw and a pin.

By adopting the scheme, the scheme has the advantages that in the die opening state, the upper die assembly and the lower die assembly are separated, the barrel is sleeved on the lower die assembly through one end of the supporting arm, when the die is closed, the upper die assembly descends, the punching male die and the punching female die hole are matched to punch the barrel, then the upper die assembly continues descending, the pressing piece is abutted against the flanging female die, pressing and flanging are started, the punching edge of the barrel is jacked to the flanging female die hole by the flanging male die to gradually realize flanging operation until the upper die assembly and the lower die assembly are upset to finish the flanging operation, the scheme can realize punching and flanging on the barrel which is circumferentially closed, can realize a plurality of processes in one stroke, avoid the process of processing the barrel by separating the traditional plurality of processes, certainly avoid the problem of repeated positioning in the traditional plurality of processes, and not only can reduce the workload, meanwhile, the machining precision of the workpiece can be improved.

The supporting arm is provided with a jacking assembly below, the jacking assembly is provided with a connecting rod capable of stretching downwards, the lower end of the connecting rod is provided with a jacking block used for abutting against the inner wall of the barrel, and by adopting the structure, the barrel can be clamped on the material pressing part through the jacking block when the barrel is clamped, so that the barrel can be clamped.

Keep somewhere the clearance between second tip in the both ends of the two outer outsides of supporting arm lower mould subassembly below space and the base, but the cooperation one side direction is fed or is withdrawed from in should keeping somewhere the clearance and move the seat, because in stamping process, the compound die power is great, for preventing that the supporting arm from appearing warping, the removal seat that corresponds the setting at the second tip, remove when the clamping, the barrel clamping of being convenient for, the clamping finishes the back, support the second tip of supporting arm through moving the seat, can effectively improve the intensity and the rigidity of whole supporting arm, avoid the supporting arm great deformation to appear in the compound die in-process.

The movable seat comprises a slide rail, the slide rail is fixed on a base, a supporting block is mounted on the slide rail, the lower foot end of the supporting block is in sliding fit with the slide rail, the upper end of the supporting block is provided with a sliding fit part used for supporting the supporting arm, the movable seat further comprises a first driving device, the fixed end of the first driving device is fixedly connected with the base, the driving end capable of moving linearly on the first driving device is connected with the supporting block, the supporting block can be driven to slide through the first driving device, the movable seat can be evacuated from the lower part of the second end of the supporting arm when the movable seat is clamped in a cylinder body, the supporting block can be moved to a desired position when stamping is carried out, and the supporting arm can be supported.

The pressing piece is close to one end of the support and is fixedly provided with a first limiting piece extending towards the first end of the supporting arm, the far end of the first limiting piece is provided with a first stop block capable of being axially adjusted along the first limiting piece, the first stop block is provided with a first limiting portion extending upwards, the end of the barrel can be positioned when the barrel is clamped through the first limiting portion of the first limiting piece, and when the position of the stamping flanging needs to be adjusted, the position of the first stop block is adjusted, and the change of the axial positioning reference is realized.

One end, far away from the support, of the material pressing piece is fixedly provided with a second limiting piece extending away from the first end of the supporting arm, the far end of the second limiting piece is provided with a rotary clamping cylinder, a driving end of the rotary clamping cylinder is connected with a fixing portion at the lower end of the second stop block, the second stop block is provided with a second limiting portion extending upwards, one end, close to the second limiting piece, of the cylinder body can be clamped and positioned through adjustment of the rotary clamping cylinder, and the cylinder body can be prevented from moving in the axial direction. Set up on the turn-ups die and be fixed with the first spacer pin that upwards extends, this first spacer pin top runs through the sliding hole that corresponds on the cope match-plate pattern and stretches into the accommodation hole of upper padding plate, pass through spacing hole shoulder transition between accommodation hole and the sliding hole, the part that first spacer pin stretches into the accommodation hole sets up first spacing step, set up first elastic element between turn-ups die and the cope match-plate pattern to make the turn-ups die have the trend of downstream, adopt this structure, realized the floating structure of turn-ups die, wherein when the turn-ups die moves the lower dead center, spacing step on the first spacer pin interferes with spacing hole shoulder, realizes the spacing of lower dead center.

The supporting arm is provided with a second limiting pin extending upwards, the second limiting pin extends upwards into a second stepped hole in the pressing piece, a second limiting step is arranged on a pin body of the second limiting pin extending into a large hole section of the second stepped hole through a small hole section of the second stepped hole, and a second elastic element is arranged between the supporting arm and the pressing piece, so that the pressing piece has a tendency of moving upwards.

The lower end of the lower flanging male die is provided with the step, the mounting step is fixedly connected with the supporting arm through the screw and the pin, the detachable connection can be realized, the replacement is convenient, the cost can be reduced, and meanwhile, the lower flanging male die is small, the mounting step is arranged, so that the lower flanging male die has a large stress surface and a mounting position for mounting a fastener, and the stability of the lower flanging male die can be improved.

Adopt above-mentioned utility model, can avoid among the traditional shaping mode that barrel machining precision is low, work efficiency is low and defect such as with high costs.

The invention will be further explained with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

fig. 5 is a cross-sectional view taken along line C-C of fig. 2.

In the drawings, 10 is a cylinder, 100 is a base, 200 is an upper die assembly, 210 is an upper die holder, 220 is a die assembly, 221 is a punching male die, 222 is a flanging female die, 223 is an upper backing plate, 224 is an upper die plate, 225 is a first limit pin, 250 is a second elastic element, 300 is a lower die assembly, 310 is a support arm, 320 is a flanging male die, 321 is a mounting step, 330 is a pressing member, 340 is a support, 350 is a second limit pin, 351 is a second limit step, 360 is a first elastic element, 400 is a die closing guide post, 500 is a jacking assembly, 510 is a connecting rod, 520 is a top block, 600 is a movable seat, 610 is a slide rail, 620 is a support block, 621 is a sliding fit portion, 630 is a first driving device, 700 is a first limit member, 710 is a first limit member, 711 is a first limit member, 720 is a second limit member, 721 is a second limit member, 723 is a rotary clamping cylinder, 800 is a support seat, 1 is a flanging female die hole, 2251 is a first stopper step, 7211 is a second stopper.

Detailed Description

Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 5, an embodiment of the cylinder punching and flanging device includes a base 100, a lower mold assembly 300, an upper mold assembly 200, and at least two supporting bases 800. The upper die assembly 200 comprises an upper die holder 210, a die assembly 220 is fixed below the upper die holder 210, the die assembly 220 is provided with a punching male die 221 protruding downwards, the lower end of the die assembly 220 is provided with a flanging female die 222 capable of floating up and down, the punching male die 221 is in clearance fit in a flanging female die hole 2221 of the flanging female die 222, and the length of the punching male die 221 is greater than the depth of the flanging female die hole 2221; in this embodiment, specifically, the die assembly 220 includes an upper pad 223 fixed at the lower end of the upper die holder 210, an upper die plate 224 is fixed at the lower end surface of the upper pad 223, the upper die plate 224 has a downward mounting hole, a punching male die 221 is mounted in the mounting hole, and a flanging female die 222 is mounted at the lower end of the upper die plate 224. The flanging female die 222 is provided with a first limiting pin 225 which extends upwards, the top end of the first limiting pin 225 penetrates through a corresponding sliding hole in the upper die plate 224 and extends into a containing hole of the upper base plate 223, the containing hole and the sliding hole are in transition through a limiting hole shoulder, a first limiting step 2251 is arranged on the part of the first limiting pin 225 extending into the containing hole, and a first elastic element 360 is arranged between the flanging female die 222 and the upper die plate 224, so that the flanging female die 222 has a downward movement trend.

The lower die assembly 300 is provided with a supporting arm 310 transversely arranged below the lower die assembly 300, first end parts of two end parts of the supporting arm 310 extending out of a space below the lower die assembly 300 are mounted on the base 100 through a support 340, the supporting arm 310 is provided with a lower flanging male die 320 capable of being inserted into an upper flanging female die hole 2221, in the embodiment, a step 321 is mounted at the lower end of the lower flanging male die 320, and the mounting step 321 is fixedly connected with the supporting arm 310 through a screw and a pin, so that the detachable connection can be realized, the replacement is convenient, the cost can be reduced, and meanwhile, because the lower flanging male die is smaller, the mounting step 321 can be provided with a larger stress surface and a mounting position for mounting a fastener, so that the stability of the lower flanging male die can be improved.

A punching female die hole for inserting the punching male die 221 is formed in the top of the lower flanging male die 320, a pressing piece 330 capable of floating up and down is arranged on the supporting arm 310, and a through hole for the lower flanging male die to pass through is formed in the pressing piece 330; in this embodiment, specifically, the supporting arm 310 is provided with a second limit pin 350 extending upward, the second limit pin 350 extends upward into the second stepped hole in the material pressing member 330, the second limit pin 350 extends into the pin body of the large hole section of the second stepped hole through the small hole section of the second stepped hole and is provided with a second limit step 351, a second elastic element 250 is arranged between the supporting arm 310 and the material pressing member 330, so that the material pressing member 330 has a tendency of moving upward, the elastic element can be an elastic device such as a compression spring, a polyurethane rubber block or a nitrogen spring, and the like, by adopting the structure, a floating structure of the material pressing member 330 can be realized, during mold closing, material pressing can be realized all the time under the action of the second elastic element 250, and the barrel 10 is prevented from wrinkling, when the material pressing member 330 moves to the top dead center position, and when the second limit step 351 interferes with the end face of the small hole section in the second stepped hole, and realizing the limit.

The supporting seat 800 is installed on the base 100, the supporting arm 310 passes through a space between the two supporting seats 800, and the supporting seat 800 is connected with the upper die holder 210 through the die assembly guide post 400.

In order to improve the reliability of clamping the cylinder 10, in this embodiment, a jacking assembly 500 is disposed below the supporting arm 310, the jacking assembly 500 has a connecting rod 510 capable of extending downward, the jacking assembly may include an air cylinder, a piston rod of the air cylinder forms the connecting rod 510 capable of extending downward, a top block 520 for abutting against an inner wall of the cylinder 10 is mounted at a lower end of the connecting rod 510, and by adopting this structure, when the cylinder 10 is clamped, the cylinder 10 can be clamped on the pressing member 330 through the top block 520, so as to clamp the cylinder 10.

In order to improve the stability of the support arm 310, in this embodiment, a gap is left between the second end of the two ends of the support arm 310 extending out of the lower space of the lower mold assembly 300 and the base 100, and a movable seat 600 capable of laterally feeding or withdrawing is fitted in the left gap, so that the movable seat 600 correspondingly arranged at the second end is moved away during clamping to facilitate clamping of the cylinder 10 in order to prevent the deformation of the support arm 310 due to a large clamping force during the stamping process, and after the clamping is finished, the second end of the support arm 310 is supported by the movable seat 600, so that the strength and rigidity of the whole support arm 310 can be effectively improved, and the large deformation of the support arm 310 during the clamping process can be avoided.

Further, the moving seat 600 includes a sliding rail 610, the sliding rail 610 is fixed on the base 100, a support block 620 is mounted on the sliding rail 610, a lower end of the support block 620 is slidably fitted on the sliding rail 610, an upper end of the support block 620 has a sliding fitting portion 621 for supporting the support arm 310, and an upper end of the sliding fitting portion 621 may have a sliding friction surface or a ball for facilitating lateral feeding or withdrawing. The clamping device further comprises a first driving device 630, the fixed end of the first driving device 630 is fixedly connected with the base 100, the driving end capable of moving linearly on the first driving device 630 is connected with the supporting block 620, the supporting block 620 can be driven to slide through the first driving device 630, the moving seat 600 can be withdrawn from the lower portion of the second end portion of the supporting arm 310 when the clamping cylinder 10 is clamped, the supporting block 620 can be moved to a desired position when the stamping is carried out, and the supporting arm 310 can be supported.

In order to facilitate axial positioning during clamping of the cylinder 10, one end of the material pressing member 330 close to the support 340 is fixed with a first limiting member 700 extending toward the first end of the support arm 310, a distal end of the first limiting member 700 is provided with a first stopper 710 axially adjustable along the first limiting member 700, the first stopper 710 is provided with a first limiting portion 711 extending upward, the end of the cylinder 10 can be positioned during clamping of the cylinder 10 by the first limiting portion 711 of the first limiting member 700, when the punching flanging position needs to be adjusted, the position of the first stopper 710 is adjusted, so that the change of the axial positioning reference is realized, and the axial adjustment can be realized based on adjusting the installation position of the first stopper or adjusting the axial distance by using a gasket. Furthermore, one end of the pressing member 330, which is far away from the supporting seat 340, is fixed with a second limiting member 720, which extends away from the first end of the supporting arm 310, a middle portion of the second limiting member can pass through the supporting member on the supporting arm, to improve the rigidity thereof and prevent deformation, the distal end of the second stopper 720 is provided with a rotary clamping cylinder 723, a driving end of the rotary clamping cylinder 723 is connected with a fixing part at the lower end of the second stopper 721, the second stopper 721, which has the second stopper 7211 extending upward, is adjusted by the rotary clamping cylinder 723, the clamping and positioning of the end of the cylinder 10 close to the second stopper 720 can be realized, the cylinder 10 can be prevented from moving in the axial direction, and when in use and after the molding is finished, the rotary clamping cylinder 723 retreats and the second limiting part 7211 releases the clamping of the cylinder, then, the second stopper 7211 is deflected by the rotation, and the second stopper 7211 does not interfere with the cylinder; during clamping, the rotary clamping cylinder 723 rotates firstly, so that the second limiting portion 7211 is located on a path capable of interfering with the cylinder, and then the rotary clamping cylinder 723 moves and clamps the cylinder.

When the scheme is adopted to punch and flange the cylinder body, the upper die assembly 200 and the lower die assembly 300 are separated in a die opening state, the cylinder body 10 is sleeved on the lower die assembly through one end of the supporting arm 310, when the die is closed, the upper die assembly 200 descends, wherein the punching male die 221 is matched with the punching female die hole to punch the cylinder body 10, then the upper die assembly 200 continues descending, the pressing piece 330 is abutted against the flanging female die to start pressing and flanging, the punching edge of the cylinder body 10 is pushed to the flanging female die hole by the lower flanging male die 320 to gradually realize flanging operation until the upper die assembly 200 and the lower die assembly 300 are upset to finish flanging operation, the scheme can realize punching and flanging the cylinder body 10 which is circumferentially closed, can realize a plurality of processes in one stroke, avoids the traditional multi-process separation of the processing process of the cylinder body 10, and can certainly avoid the problem of repeated positioning in the traditional multi-process, the workload can be reduced, and the processing precision of the workpiece can be improved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a barrel flanging device that punches a hole which characterized in that includes:

a base (100);

the upper die assembly (200) comprises an upper die holder (210), a die assembly (220) is fixed below the upper die holder (210), the die assembly (220) is provided with a punching male die (221) protruding downwards, a flanging female die (222) capable of floating up and down is arranged at the lower end of the die assembly (220), the punching male die (221) is in clearance fit in a flanging female die hole (2221) of the flanging female die (222), and the length of the punching male die (221) is greater than the depth of the flanging female die hole (2221);

the lower die assembly (300) is provided with a supporting arm (310) transversely arranged below the lower die assembly (300), the first end of two ends of the supporting arm (310) extending out of the space below the lower die assembly (300) is mounted on the base (100) through a support (340), the supporting arm (310) is provided with a lower flanging male die (320) capable of being inserted into an upper flanging female die hole (2221), the top of the lower flanging male die (320) is provided with a punching female die hole for inserting a punching male die (221), the supporting arm (310) is provided with a material pressing piece (330) capable of floating up and down, and the material pressing piece (330) is provided with a through hole for the lower flanging male die to pass through;

the die-assembling device comprises at least two supporting seats (800), wherein the supporting seats (800) are arranged on a base (100), the supporting arm (310) penetrates through the space between the two supporting seats (800), and the supporting seats (800) are connected with an upper die base (210) through die-assembling guide columns (400).

2. The cylinder punching and flanging device according to claim 1, characterized in that a jacking assembly (500) is arranged below the supporting arm (310), the jacking assembly (500) is provided with a connecting rod (510) capable of extending and retracting downwards, and the lower end of the connecting rod (510) is provided with a jacking block (520) used for abutting against the inner wall of the cylinder (10).

3. The cylinder punching and flanging device according to claim 1, wherein a gap is left between the second end of the two ends of the supporting arm (310) extending out of the space under the lower die assembly (300) and the base (100), and a movable seat (600) capable of laterally feeding or withdrawing is matched in the left gap.

4. The cylinder punching and flanging device according to claim 3, characterized in that the movable base (600) comprises a slide rail (610), the slide rail (610) is fixed on the base (100), a support block (620) is mounted on the slide rail (610), the lower foot end of the support block (620) is in sliding fit on the slide rail (610), the upper end of the support block (620) is provided with a sliding fit part (621) for supporting the support arm (310), the device further comprises a first driving device (630), the fixed end of the first driving device (630) is fixedly connected with the base (100), and the driving end of the first driving device (630) which can move linearly is connected with the support block (620).

5. The barrel punching and flanging device according to claim 1, wherein one end of the pressing member (330) close to the support seat (340) is fixed with a first limiting member (700) extending towards the first end of the supporting arm (310), the distal end of the first limiting member (700) is provided with a first stop block (710) axially adjustable along the first limiting member (700), and the first stop block (710) is provided with a first limiting portion (711) extending upwards.

6. The cylinder punching and flanging device according to claim 5, wherein one end of the pressing member (330) far away from the support (340) is fixed with a second limiting member (720) extending away from the first end of the supporting arm (310), the far end of the second limiting member (720) is provided with a rotary clamping cylinder (723), the driving end of the rotary clamping cylinder (723) is connected with the fixed part at the lower end of a second stop block (721), and the second stop block (721) is provided with a second limiting part (7211) extending upwards.

7. The cylinder body punching and flanging device is characterized in that the die assembly (220) comprises an upper backing plate (223) fixed at the lower end of an upper die holder (210), an upper die plate (224) is fixed at the lower end face of the upper backing plate (223), the upper die plate (224) is provided with a downward mounting hole, a punching male die (221) is mounted in the mounting hole, and a flanging female die (222) is mounted at the lower end of the upper die plate (224).

8. The cylinder punching and flanging device according to claim 7, characterized in that a first limiting pin (225) extending upwards is fixed on the flanging die (222), the top end of the first limiting pin (225) penetrates through a corresponding sliding hole in the upper die plate (224) and extends into a containing hole of the upper backing plate (223), the containing hole and the sliding hole are in transition through a limiting hole shoulder, a first limiting step (2251) is arranged at a part of the first limiting pin (225) extending into the containing hole, and a first elastic element (360) is arranged between the flanging die (222) and the upper die plate (224) so that the flanging die (222) has a downward movement tendency.

9. The cylinder punching and flanging device according to claim 1, wherein the supporting arm (310) is provided with a second limiting pin (350) extending upwards, the second limiting pin (350) extends upwards into a second stepped hole in the material pressing piece (330), a pin body of the second limiting pin (350) extending into a large hole section of the second stepped hole through a small hole section of the second stepped hole is provided with a second limiting step (351), and a second elastic element (250) is arranged between the supporting arm (310) and the material pressing piece (330) so that the material pressing piece (330) has a tendency to move upwards.

10. The cylinder punching and flanging device is characterized in that a step (321) is arranged at the lower end of the lower flanging male die (320), and the mounting step (321) is fixedly connected with the supporting arm (310) through screws and pins.