CN212190862U

CN212190862U - Stamping mechanism of multi-link type punching machine

Info

Publication number: CN212190862U
Application number: CN202020426607.7U
Authority: CN
Inventors: 房开拓; 王春燕; 葛海浪; 唐友亮; 赵宏顺; 施允洋; 王晓华
Original assignee: Suqian College
Current assignee: Suqian College
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-12-22
Anticipated expiration: 2030-03-27

Abstract

The utility model provides a punching press mechanism of multi-link punch press belongs to mechanical stamping equipment technical field, including the workstation and install in frame on the workstation, rotatable coupling has the punching press carousel on the workstation, be equipped with at least one die holder on the punching press carousel, the upside of die holder is equipped with the punching press pole, be equipped with in the frame cup joint in first spacing uide bushing on the punching press pole, the punching press pole with first spacing uide bushing sliding connection, the punching press pole passes the one end of first spacing uide bushing is equipped with the last mould punching press head rather than the lower die holder looks adaptation that corresponds, the upper end of punching press pole is equipped with the drive multi-link rod link mechanism of the vertical removal of punching press pole. The device realizes the process of feeding, stamping and discharging of the lower die holder through the rotation of the stamping turntable, and can be matched with a multi-connecting-rod structure, thereby prolonging the response time, prolonging the plastic forming time of the section, reducing the stress action of the section and improving the working efficiency.

Description

Stamping mechanism of multi-link type punching machine

Technical Field

The utility model belongs to the technical field of mechanical stamping equipment, concretely relates to punching press mechanism of multi-link punch press.

Background

Stamping, that is, a mechanical processing method for obtaining a workpiece of a desired shape and size by plastically deforming or separating a plate material or the like using a press and a die, and the apparatus for implementing the method is a punch press, that is, a stamping press.

The plastic processing or separation of various sectional materials is realized through the punch, the labor action can be saved, the stress range which cannot be reached by a manual action repeated impact method is reached, and the sectional materials can achieve a better forging and pressing effect under the action of uniform force.

However, most of the existing punching mechanisms only have a single lower die, and the operation needs to be suspended before and after the punching is completed, so that the profile can be replaced or adjusted, the complexity of the operation is increased, time and labor are wasted, and the working efficiency is low.

In addition, in the process of high-speed stamping, the high-speed stamping action of the existing stamping mechanism is not equal to the time for replacing the section on the lower die, and in the process of quick return stroke, because the section is not replaced timely and the response is delayed, the process time is increased, certain vibration and noise can be generated, and the working environment is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, an object of the present invention is to provide a punching mechanism of a multi-link punch, which is characterized in that a lower die holder is rotated to a punching position during a rotation process by a rotation of a punching turntable, and the lower die holder is rotated to a blanking position after punching is completed, so that a profile can be replaced in time, and response efficiency is improved; and the multi-connecting-rod structure drives the stamping rod to move repeatedly, so that the stamping stroke is delayed to a certain extent to match the rotating response time of the lower die holder, and the working efficiency is improved.

In order to achieve the above object, the technical solution of the present invention is as follows.

A stamping mechanism of a multi-connecting-rod type punch comprises a workbench and a rack arranged on the workbench, wherein a stamping turntable is rotatably connected to the workbench, and at least one lower die holder is arranged on the stamping turntable;

the stamping device comprises a lower die base, a rack, a stamping rod, a first limiting guide sleeve, an upper die stamping head, a lower die base and a lower die base, wherein the upper side of the lower die base is provided with the stamping rod;

the upper end of the stamping rod is provided with a multi-connecting-rod type connecting rod mechanism which drives the stamping rod to vertically move.

Further, the link mechanism sequentially comprises an L-shaped steering rod, a connecting rod and a rocker arm from bottom to top, and two ends of the connecting rod are respectively hinged with the L-shaped steering rod and the rocker arm;

the bending part of the L-shaped steering rod is hinged with the rack, one end of the L-shaped steering rod is provided with a first long-strip-shaped lantern ring, and one end of the stamping rod, which is far away from the upper die stamping head, is rotatably connected with the first lantern ring;

the rocker arm is close to the lower end of the connecting rod and is hinged with the rack, and a cam connecting rod adjuster which drives the rocker arm to rotate is arranged at the other end of the rocker arm, which is far away from the connecting rod.

Furthermore, the cam link adjuster comprises a horizontal telescopic rod, a cam assembly and a worm, wherein two ends of the horizontal telescopic rod horizontally penetrate through the rack and are in sliding connection with the rack, the other end of the rocker arm is sleeved with a loop bar, one end of the loop bar is rotatably arranged in the middle of the horizontal telescopic rod, and the horizontal telescopic rod is sleeved with a return spring which drives the horizontal telescopic rod to move towards the cam assembly;

the cam assembly comprises a cam and a power gear, the power gear is coaxially connected with the cam, one end of the horizontal telescopic rod, which is close to the cam, is provided with a roller, and the roller is abutted against the side wall of the cam;

one side of the power gear is provided with a worm meshed with the power gear in a tooth shape, two ends of the worm are rotatably connected with the rack, and one end of the worm is connected with a first motor through a conveying belt.

Furthermore, a second elongated sleeve ring is arranged in the middle of the horizontal telescopic rod, and the end part of the sleeve rod is rotatably connected with the second sleeve ring; the reset spring is sleeved on the other end of the horizontal telescopic rod far away from the cam component.

Furthermore, a vertical rod positioned between the horizontal telescopic rod and the cam assembly is arranged on the rack, a second limiting guide sleeve is arranged on the vertical rod, and one end, close to the cam assembly, of the horizontal telescopic rod penetrates through the second limiting guide sleeve and is connected with the roller; the other end of the horizontal telescopic rod, which is far away from the roller, is connected with a third limiting guide sleeve in a sliding manner, and the third limiting guide sleeve is fixedly connected with the rack.

Still further, the downside level of cam link regulator is equipped with first bracing piece, first bracing piece with the one end fixed connection of perpendicular pole, the articulated elements is passed through to the one end of first bracing piece with the lower tip of rocking arm is articulated, the articulated elements set up in top one side of L type steering column, the rocking arm is close to the one end of connecting rod is equipped with arc connecting portion, arc connecting portion with the connecting rod is articulated.

Furthermore, a second support rod is horizontally arranged on one side, close to the L-shaped steering rod, of the rack, and one end of the second support rod is hinged with the angle bending part of the L-shaped steering rod; and a third supporting rod is horizontally arranged on one side, close to the stamping rod, of the rack, and the first limiting guide sleeve is fixedly arranged on the third supporting rod.

Furthermore, the first sleeve ring and the second sleeve ring are internally provided with limiting guide wheels, and the end parts of the stamping rod and the sleeve rod are rotatably connected with the corresponding limiting guide wheels.

Furthermore, one end of the loop bar is provided with a cavity convenient for the rocker arm to slide, the other end of the rocker arm is inserted into the cavity and is connected with a limiting block, the end part of the cavity is provided with a limiting ring, and the inner diameter of the limiting ring is smaller than the outer diameter of the limiting block.

Further, the downside of punching press carousel is equipped with the drive punching press carousel is rotary mechanism regularly, rotary mechanism includes electric turntable and second motor, electric turntable's the outside is equipped with the external tooth dish, punching press carousel's middle part is equipped with the internal tooth dish, the external tooth dish peg graft in the internal tooth dish, and with the meshing of internal tooth dish tooth shape, the output shaft of second motor peg graft in on the electric turntable, and with electric turntable fixed connection.

The utility model has the advantages that:

the utility model provides a pair of punching press mechanism of multi-link formula punch press, the device pass through the rotation of punching press carousel, make the die holder be changeed to the punching press position at rotatory in-process, and the back is accomplished in the punching press, make the die holder rotatory to the unloading position to realize the material loading-punching press-unloading process of die holder, the convenience is to the timely change of section bar for response efficiency. In addition, the multi-connecting-rod type connecting rod mechanism drives the stamping rod to move repeatedly, so that the stroke of the stamping rod is delayed to a certain extent, the response time is prolonged, the plastic forming time of the section is prolonged, and the stress action of the section is reduced. And, the response time that the multi-link rod mechanism drives the punching rod to move repeatedly can be matched with the rotation response time of the lower die holder, and the working efficiency is improved.

The punching rod can enable the upper die punching head to act on the corresponding lower die holder through the action of the first limiting guide sleeve, so that the offset of a punching part is avoided, and the punching precision of the section bar is improved.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram of a portion B in fig. 1.

Fig. 4 is a schematic structural view of a rocker arm in embodiment 1 of the present invention.

Fig. 5 is a schematic structural view of a punching turntable and a rotating mechanism in embodiment 1 of the present invention.

Fig. 6 is a schematic structural view of an inner toothed disc and an outer toothed disc in embodiment 1 of the present invention.

Fig. 7 is a schematic structural view of embodiment 2 of the present invention.

Fig. 8 is a schematic structural view of a workbench and a punching turntable in embodiment 2 of the present invention.

In the figure: 1. a work table; 101. a blanking cavity; 102. a discharge outlet; 103. an oblique channel; 104. a feed inlet; 2. a frame; 201. a first limit guide sleeve; 202. a vertical rod; 203. a second limiting guide sleeve; 204. a third limiting guide sleeve; 205. a first support bar; 206. a second support bar; 207. a third support bar; 3. punching the rotary table; 301. a lower die holder; 302. an inner fluted disc; 303. a through hole; 4. a stamping rod; 401. an upper die stamping head; 5. an L-shaped steering rod; 501. a first collar; 6. a rocker arm; 601. a loop bar; 602. an arc-shaped connecting part; 603. a limiting block; 604. a limiting ring; 7. a connecting rod; 8. a horizontal telescopic rod; 801. a second collar; 802. a roller; 803. a return spring; 9. a cam assembly; 901. a cam; 902. a power gear; 11. a conveyor belt; 12. a first motor; 121. a driving wheel; 13. a rotation mechanism; 131. an electric turntable; 132. a second motor; 133. an external fluted disc; 14. a worm; 141. a driven wheel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, a schematic structural diagram of a punching mechanism of a multi-link punching machine according to the present embodiment includes a worktable 1 and a frame 2, wherein the frame 2 is mounted on the worktable 1 and is used for mounting the multi-link mechanism and the punching rod.

The workbench 1 is rotatably connected with a punching turntable 3, and the punching turntable 3 is provided with at least one lower die holder 301. The lower side of the punching rotary disc 3 is provided with a rotating mechanism 13 which drives the punching rotary disc 3 to rotate at regular time, and the rotating response time of the lower die holder is adjusted through the rotating mechanism.

Specifically referring to fig. 5 and fig. 6, the rotating mechanism 13 includes an electric turntable 131 and a second motor 132, an output shaft of the second motor 132 is inserted into the electric turntable 131 and is fixedly connected to the electric turntable 131, the second motor 132 is started, the electric turntable 131 is driven to rotate by the second motor 132, and the rotating speed of the electric turntable 131 is adjusted. The outer side of the electric turntable 131 is provided with an outer fluted disc 133, the middle part of the punching turntable 3 is provided with an inner fluted disc 302 matched with the outer fluted disc 133, the center of the bottom of the punching turntable 3 is provided with a groove for mounting the inner fluted disc 302, and the inner fluted disc 302 is fixedly arranged in the groove. The outer toothed plate 133 is inserted into the inner toothed plate 302 and is engaged with the inner toothed plate 302 in a tooth form.

When the second motor 132 drives the electric turntable 131 to rotate, the outer toothed disc 133 rotates along with the rotation of the electric turntable 131, and the outer toothed disc 133 is engaged with the inner toothed disc 302 in a tooth form, so that the inner toothed disc 302 rotates along with the rotation of the outer toothed disc 133, and the punching turntable 3 is further driven to rotate. By adjusting the gear ratio between the outer toothed plate 133 and the inner toothed plate 302, the rotational speed of the punching rotor 3 can also be adjusted.

As shown in fig. 1, 4 lower die holders 301 are arranged on the punching turntable 3, a punching rod 4 is arranged on the upper side of one of the lower die holders 301, a first limiting guide sleeve 201 sleeved on the punching rod 4 is arranged on the frame 2, a third support rod 207 is horizontally arranged on one side of the frame 2 close to the punching rod 4, and the first limiting guide sleeve 201 is fixedly arranged at one end of the third support rod 207. The lower extreme of stamping rod 4 passes first spacing uide bushing 201, and with first spacing uide bushing 201 sliding connection, the one end that stamping rod 4 passed first spacing uide bushing 201 is equipped with the last mould punching press head 401 rather than the lower bolster 301 looks adaptation that corresponds, and the upper end of stamping rod 4 is equipped with the link mechanism that drives stamping rod 4 vertical movement.

In this embodiment, the punching press carousel is installed on the workstation, and is located the downside of frame, through the rotation of punching press carousel, can make the die holder that is located on the punching press carousel, at rotatory in-process, is changeed to the punching press position, and after the punching press was ended, the die holder was rotatory to the unloading position to realize the material loading-punching press-unloading process of die holder, the convenience is to the timely change of section bar, accelerates response efficiency.

And the connecting rod mechanism and the stamping rod 4 are both arranged on the frame 2, so that the connecting rod mechanism can drive the stamping rod to realize reciprocating motion. The multi-connecting-rod type connecting rod mechanism drives the stamping rod to move repeatedly, so that the stroke of the stamping rod is delayed to a certain extent, the response time is prolonged, the plastic forming time of the section is prolonged, and the stress effect of the section is reduced. And, the response time that the multi-link rod mechanism drives the punching rod to move repeatedly can be matched with the rotation response time of the lower die holder, and the working efficiency is improved. The downward stamping response time of the stamping rod can be adjusted through the multi-connecting-rod type connecting rod mechanism, and the rotation response time of the lower die holder can be adjusted through the power element of the stamping turntable.

In addition, the stamping rod can enable the upper die stamping head to act on the corresponding lower die holder through the action of the first limiting guide sleeve, so that the offset of a stamping part is avoided, and the stamping precision of the section bar is improved.

Referring to fig. 1 and 2, the link mechanism sequentially includes an L-shaped steering rod 5, a connecting rod 7 and a rocker arm 6 from bottom to top, and two ends of the connecting rod 7 are respectively hinged with the end portions of the L-shaped steering rod 5 and the rocker arm 6; that is, one end of the connecting rod 7 is hinged to one end of the L-shaped steering rod 5, and the other end of the connecting rod 7 is hinged to one end of the rocker arm 6.

The bending part of the L-shaped steering rod 5 is hinged with the frame 2, that is, one side of the frame 2 close to the L-shaped steering rod 5 is horizontally provided with a second support rod 206, and one end of the second support rod 206 is hinged with the bending part of the L-shaped steering rod 5; the L-shaped steering rod is L-shaped, and the folded angle part is the folded part of the L-shaped steering rod.

One end of the L-shaped steering rod 5 is provided with a first long-strip-shaped collar 501, and one end of the stamping rod 4, which is far away from the upper die stamping head 401, is rotatably connected with the first collar 501; a limiting guide wheel is arranged in the first sleeve ring 501, and the end part of the stamping rod 4 is rotatably connected with the limiting guide wheel. Here, the top end of the stamping rod 4 is provided with a top end groove, the top end groove penetrates through the side wall of the first sleeve ring, extends to two sides of the rotating shaft of the limiting guide wheel, and is rotatably connected with the limiting guide wheel, so that the limiting guide wheel can move along the first sleeve ring.

In this embodiment, set up connecting rod 7 to the horizontality, conveniently promote L type steering column and take place to rotate, and then drive stamping rod 4 and take place vertical migration. The contained angle between connecting rod 7 and the rocking arm 6 is less than 90, and the contained angle between the vertical portion of connecting rod 7 and L type steering column 5 is less than 180, has set gradually rocking arm 6, connecting rod 7 and L type steering column 5 along the direction towards the ram rod with this link mechanism, conveniently promotes L type steering column and takes place the rotation, and then drives the ram rod and realizes vertical reciprocating motion.

The upper side of the L-shaped steering rod is horizontally provided with a first supporting rod 205, one end of the first supporting rod 205 is provided with a hinge, one end of the first supporting rod 205 is hinged with the lower end of the rocker arm 6 through the hinge, the hinge is a U-shaped hinge and a bolt, the lower end of the rocker arm 6 is installed in the U-shaped hinge, and the hinge is hinged with the first supporting rod 205 through the bolt. One end of the rocker arm 6 close to the connecting rod 7 is provided with an arc-shaped connecting part 602, and the arc-shaped connecting part 602 is hinged with the connecting rod 7. The articulated elements are arranged on one side of the arc-shaped connecting part, and the rocker arm 6 can be rotated in a labor-saving manner according to the lever principle. And the articulated elements are arranged on one side of the top of the L-shaped steering rod 5, so that the L-shaped steering rod 5 is conveniently pushed to rotate through the connecting rod 7.

Referring to fig. 1 and 3, a cam link adjuster for driving the rocker arm 6 to rotate is disposed on the other end of the rocker arm 6 away from the connecting rod 7, and the cam link adjuster is horizontally disposed on the upper side of the first supporting rod 205.

Wherein the cam link adjuster comprises a horizontal telescopic rod 8, a cam assembly 9 and a worm 14.

Both ends of the horizontal telescopic rod 8 horizontally penetrate through the rack 2 and are connected with the rack 2 in a sliding manner. The rack 2 is provided with a vertical rod 202 located between the horizontal telescopic rod 8 and the cam assembly 9, the lower end of the vertical rod 202 is fixedly connected with the first supporting rod 205, the vertical rod 202 is provided with a second limiting guide sleeve 203, and one end of the horizontal telescopic rod 8, which is close to the cam assembly 9, passes through the second limiting guide sleeve 203 and is in sliding connection with the second limiting guide sleeve 203. The other end of the horizontal telescopic rod 8, which is far away from the cam assembly 9, is provided with a third limiting guide sleeve 204, and is in sliding connection with the third limiting guide sleeve 204, and the third limiting guide sleeve 204 is fixedly connected with one side wall of the rack 2. Here, two ends of the horizontal telescopic rod are slidably connected with the second limiting guide sleeve 203 and the third limiting guide sleeve 204 respectively.

Referring to fig. 1 and 4, a loop bar 601 is sleeved on the other end of the rocker arm 6 away from the connecting rod 7, one end of the loop bar 601 is rotatably installed in the middle of the horizontal telescopic rod 8, and a return spring 803 for driving the horizontal telescopic rod 8 to move toward the cam assembly 9 is sleeved on the horizontal telescopic rod 8. When the horizontal telescopic rod 8 moves towards one side of the reset spring, one end of the loop bar moves along with the horizontal telescopic rod, and then the rocker arm 6 is driven to rotate.

The lower extreme of loop bar 601 is equipped with the gliding cavity of rocking arm 6 of being convenient for, the other end of rocking arm 6 is pegged graft in this cavity, and be connected with stopper 603, the lower tip of cavity is equipped with the spacing ring 604 with stopper 603 looks adaptation, the other end of rocking arm passes the spacing ring, and peg graft and get into in this cavity, and with stopper fixed connection, the internal diameter size of spacing ring 604 is less than the external diameter size of stopper 603, make the stopper remove in this cavity, and restrict this cavity of 6 roll-off of rocking arm, the stability of being connected of loop bar and rocking arm has been guaranteed.

Referring to fig. 3, the middle of the horizontal telescopic rod 8 is provided with a second elongated collar 801, and the end of the collar 601 is rotatably connected to the second collar 801. A limiting guide wheel is arranged in the second sleeve ring, and the upper end part of the loop bar 601 is rotatably connected with the limiting guide wheel. The upper end of loop bar 601 is equipped with the tip recess, and the tip recess passes the lateral wall of second lantern ring, and extends to the pivot both sides of spacing leading wheel to with spacing leading wheel rotatable coupling, make spacing leading wheel can follow the second lantern ring and remove.

The reset spring 803 is sleeved on the other end of the horizontal telescopic rod 8 far away from the cam assembly 9, when the horizontal telescopic rod moves towards the reset spring, one end of the reset spring abuts against one side of the third limiting guide sleeve 204, and the other end of the reset spring abuts against one side of the second sleeve ring 801, generates elastic deformation, and has power for driving the horizontal telescopic rod 8 to move towards the cam assembly 9.

The cam assembly 9 includes a cam 901 and a power gear 902 provided on the cam 901, and the power gear 902 is coaxially connected to the cam 901, that is, the rotation of the power gear is synchronized with the rotation of the cam. One end of the horizontal telescopic rod 8 close to the cam 901 is provided with a roller 802, and one end of the horizontal telescopic rod 8 passes through the second limiting guide sleeve 203 and is connected with the roller 802. The roller 802 abuts against the side wall of the cam 901, so that the rotation friction between the horizontal telescopic rod and the cam is reduced.

The lower side of the power gear 902 is horizontally provided with a worm 14 engaged with the power gear 902 in a tooth form, and both ends of the worm 14 are rotatably connected with the frame 2. In order to improve the connection stability of the worm, a vertical rod is connected to the middle of the worm, the upper end of the vertical rod is rotatably connected to the worm, and the lower end of the vertical rod is fixedly connected to the first support rod 205.

One end of the worm 14 is connected to a first motor 12 via a conveyor belt 11. One side of the frame 2 close to the first motor is provided with a mounting frame for mounting the first motor, and the first motor is mounted on the mounting frame.

A driven wheel 141 is arranged at one end of the worm 14 far away from the horizontal telescopic rod 8, a driving wheel 121 is arranged on an output shaft of the first motor 12, a plurality of mounting grooves for mounting the conveyor belt 11 are formed in the driving wheel 121 and the driven wheel 141, a plurality of meshing teeth are uniformly arranged in each mounting groove, and the conveyor belt 11 is a tooth-shaped conveyor belt and is in tooth-shaped meshing with the meshing teeth in the mounting grooves. When the first motor is started, the output shaft of the first motor rotates to drive the driving wheel to rotate, and then the driven wheel is driven to rotate through the tooth-shaped transmission belt, so that the worm rotates. Because the worm is meshed with the power gear in the tooth form, the power gear rotates to drive the cam to rotate. Due to the irregular shape of the cam, the horizontal telescopic rod can be pushed to move towards one side far away from the cam, and then the rocker arm 6 is driven to rotate.

Example 2

Please refer to fig. 7, which is a schematic structural diagram of a stamping mechanism of a multi-link punch according to another embodiment, the structure is substantially the same as that of embodiment 1, but the difference is that a blanking chamber 101 is provided in a worktable, a feeding port 104 is provided on the worktable 1 and located at one side of the stamping turntable 3, and the feeding port 104 is provided at one side of the top of the blanking chamber 101. The side wall of the working table 1 is provided with a discharge opening 102, and the discharge opening 102 is connected with the blanking cavity 101 through an inclined channel 103. When the lower die holder on the punching turntable rotates to the blanking position, namely, when the lower die holder is positioned on one side of the feeding hole 104, the punched section bar can conveniently fall into the blanking cavity from the feeding hole, a slope-shaped oblique channel is arranged in the blanking cavity, the section bar conveniently slides downwards due to gravity, and then the section bar is transferred to the next procedure through the discharging hole, and the working efficiency is improved. This structure is suitable for the punching of small-volume profiles.

Referring to fig. 8, when the profile needs to be punched, a through hole 303 is formed in the middle of each lower die holder 301, and each through hole 303 is communicated with the blanking cavity 101, so that the punching operation is facilitated, and the punched material is discharged from the blanking cavity 101.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The punching mechanism of the multi-connecting-rod type punching machine is characterized by comprising a workbench (1) and a frame (2) arranged on the workbench (1), wherein a punching turntable (3) is rotatably connected to the workbench (1), and at least one lower die holder (301) is arranged on the punching turntable (3);

a stamping rod (4) is arranged on the upper side of the lower die holder (301), a first limiting guide sleeve (201) sleeved on the stamping rod (4) is arranged on the rack (2), the stamping rod (4) is connected with the first limiting guide sleeve (201) in a sliding mode, and an upper die stamping head (401) matched with the corresponding lower die holder (301) is arranged at one end, penetrating through the first limiting guide sleeve (201), of the stamping rod (4);

the upper end of the stamping rod (4) is provided with a multi-connecting-rod type connecting rod mechanism which drives the stamping rod (4) to vertically move.

2. The punching mechanism of the multi-link punch press according to claim 1, wherein the link mechanism comprises an L-shaped steering rod (5), a connecting rod (7) and a rocker arm (6) from bottom to top in sequence, and two ends of the connecting rod (7) are respectively hinged with the L-shaped steering rod (5) and the rocker arm (6);

the bending part of the L-shaped steering rod (5) is hinged with the rack (2), one end of the L-shaped steering rod (5) is provided with a first long-strip-shaped lantern ring (501), and one end, away from the upper die stamping head (401), of the stamping rod (4) is rotatably connected with the first lantern ring (501);

the rocker arm (6) is close to the lower end part of the connecting rod (7) and is hinged to the rack (2), and a cam connecting rod adjuster which drives the rocker arm (6) to rotate is arranged at the other end, far away from the connecting rod (7), of the rocker arm (6).

3. The punching mechanism of the multi-link punch press according to claim 2, wherein the cam link adjuster comprises a horizontal telescopic link (8), a cam assembly (9) and a worm (14), both ends of the horizontal telescopic link (8) horizontally penetrate through the frame (2) and are slidably connected with the frame (2), the other end of the rocker arm (6) is sleeved with a loop bar (601), one end of the loop bar (601) is rotatably installed in the middle of the horizontal telescopic link (8), and the horizontal telescopic link (8) is sleeved with a return spring (803) for driving the horizontal telescopic link (8) to move towards the cam assembly (9);

the cam component (9) comprises a cam (901) and a power gear (902), the power gear (902) is coaxially connected with the cam (901), one end, close to the cam (901), of the horizontal telescopic rod (8) is provided with a roller (802), and the roller (802) is abutted to the side wall of the cam (901);

one side of power gear (902) be equipped with power gear (902) tooth-shaped meshing's worm (14), the both ends of worm (14) all with frame (2) rotatable coupling, the one end of worm (14) is connected with first motor (12) through conveyer belt (11).

4. The punching mechanism of the multi-link punch press according to claim 3, wherein the middle of the horizontal telescopic rod (8) is provided with a second sleeve ring (801) with a long bar shape, and the end of the sleeve rod (601) is rotatably connected with the second sleeve ring (801); the return spring (803) is sleeved on the other end of the horizontal telescopic rod (8) far away from the cam component (9).

5. The punching mechanism of the multi-link punch press according to claim 3, wherein the frame (2) is provided with a vertical rod (202) between the horizontal telescopic rod (8) and the cam assembly (9), the vertical rod (202) is provided with a second limiting guide sleeve (203), one end of the horizontal telescopic rod (8) close to the cam assembly (9) passes through the second limiting guide sleeve (203) and is connected with the roller (802); the other end, far away from the roller (802), of the horizontal telescopic rod (8) is connected with a third limiting guide sleeve (204) in a sliding mode, and the third limiting guide sleeve (204) is fixedly connected with the rack (2).

6. The punching mechanism of the multi-link punch press according to claim 5, wherein a first supporting rod (205) is horizontally disposed at a lower side of the cam link adjuster, the first supporting rod (205) is fixedly connected to one end of the vertical rod (202), one end of the first supporting rod (205) is hinged to a lower end of the rocker arm (6) through a hinge, the hinge is disposed at one side of a top of the L-shaped steering rod (5), an arc-shaped connecting portion (602) is disposed at one end of the rocker arm (6) close to the connecting rod (7), and the arc-shaped connecting portion (602) is hinged to the connecting rod (7).

7. The punching mechanism of the multi-link punch press according to claim 2, wherein a second support rod (206) is horizontally disposed on a side of the frame (2) close to the L-shaped steering rod (5), and one end of the second support rod (206) is hinged to the bevel portion of the L-shaped steering rod (5); a third supporting rod (207) is horizontally arranged on one side, close to the stamping rod (4), of the rack (2), and the first limiting guide sleeve (201) is fixedly arranged on the third supporting rod (207).

8. The punching mechanism of the multi-link punch press according to claim 4, wherein the first collar (501) and the second collar (801) are provided with limit guide wheels, and the ends of the punching rod (4) and the loop bar (601) are rotatably connected with the corresponding limit guide wheels.

9. The punching mechanism of the multi-link punch press according to claim 3, wherein one end of the loop bar (601) is provided with a cavity for the rocker arm (6) to slide, the other end of the rocker arm (6) is inserted into the cavity and connected with a limit block (603), the end of the cavity is provided with a limit ring (604), and the inner diameter of the limit ring (604) is smaller than the outer diameter of the limit block (603).

10. The punching mechanism of the multi-link punch press according to claim 1, wherein a rotating mechanism (13) for driving the punching turntable (3) to rotate at regular time is disposed at a lower side of the punching turntable (3), the rotating mechanism (13) comprises an electric turntable (131) and a second motor (132), an outer toothed disc (133) is disposed at an outer side of the electric turntable (131), an inner toothed disc (302) is disposed at a middle portion of the punching turntable (3), the outer toothed disc (133) is inserted into the inner toothed disc (302) and is in tooth-shaped engagement with the inner toothed disc (302), and an output shaft of the second motor (132) is inserted into the electric turntable (131) and is fixedly connected with the electric turntable (131).