CN113290167A

CN113290167A - Automobile parts stamping device

Info

Publication number: CN113290167A
Application number: CN202110564434.4A
Authority: CN
Inventors: 胡俊艳
Original assignee: Jujube Datong Beijing Great Automotive Components Co ltd
Current assignee: Jujube Datong Beijing Great Automotive Components Co ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-08-24

Abstract

The invention provides an automobile part stamping device, which comprises: the rack is provided with a slide rail; the driving mechanism comprises a crank component, a connecting rod component and a sliding block, wherein the connecting rod component comprises a lantern ring, a connecting rod and a connecting piece, the lantern ring is sleeved on the crank component, the upper end and the lower end of the connecting rod are respectively hinged with the lantern ring and the connecting piece, the connecting piece is connected with the sliding block, and the sliding block is arranged on the sliding rail in a sliding manner; overload protection mechanism, including guide bar, round pin axle, hinge pole subassembly and elastic component, the one end and the link assembly hinge of guide bar are connected, and the one end of hinge pole subassembly is articulated with lantern ring and connecting rod respectively, and the other end passes through round pin axle rotation to be connected and slide and set up on the guide bar, and the other end of guide bar is fixed with the fastener, and the elastic component cover is established on the guide bar that the fastener was located between fastener and the round pin axle. The invention can absorb redundant stamping potential energy through the overload protection mechanism, avoid the connecting rod from bearing larger load deformation, avoid the damage of the stamping machine and simultaneously reduce stamping overload scrap of workpiece materials.

Description

Automobile parts stamping device

Technical Field

The invention relates to the technical field of automobile part stamping, in particular to an automobile part stamping device.

Background

With the continuous development of social economy and the continuous improvement of living standard of people, the holding capacity of private cars is larger and larger, various parts are required to be used in the production process of the cars, most parts on the cars are directly punched and bent by metal materials at present, thus, punching equipment is required to be used in the production process of the car parts, the existing punching and bending production of the car parts adopts a production line type, a mechanical arm is utilized to automatically carry out loading and unloading on the punching equipment, a general punching machine drives a connecting rod by the rotation of a crank, the connecting rod drives a sliding block to generate the action of up-and-down displacement, the sliding block can be matched with a mould to carry out the action of punching and bending a workpiece, therefore, the sliding block and the connecting rod must bear the extremely large reaction force generated by processing, and the mechanical arm is controlled by programming, so that accidental errors can occur, repeated material loading promptly leads to a plurality of work pieces to be snatched simultaneously and places stamping equipment on, because stamping die only is suitable for the punching press of single work piece operation of bending when the design, a plurality of work pieces are stamped by the mould simultaneously then can lead to the punching machine to bear great load, do not carry out overload protection to the connecting rod mostly on the current punching machine to lead to the connecting rod to receive deformation under the stronger reaction force, lead to the unable normal work of whole punching machine when serious, also can cause the punching press of workpiece material to scrap.

Disclosure of Invention

In view of this, the invention provides an automobile part stamping device, which is used for solving the problem that a stamping machine is easy to damage when a plurality of automobile parts are stamped and bent simultaneously because a stamping machine in the prior art does not have a proper overload protection device.

The technical scheme of the invention is realized as follows: the invention provides an automobile part stamping device, which comprises:

the rack is provided with a slide rail;

the driving mechanism comprises a crank assembly, a connecting rod assembly and a sliding block, the crank assembly is rotatably arranged at the top of the frame, the connecting rod assembly comprises a lantern ring, a connecting rod and a connecting piece, the lantern ring is sleeved on the crank assembly, the upper end of the connecting rod is hinged with the lower end of the lantern ring, the upper end of the connecting piece is hinged with the lower end of the connecting rod, the lower end of the connecting piece is connected with the sliding block, and the sliding block is arranged on the sliding rail in a sliding mode and used for being connected with a stamping die;

the overload protection mechanism comprises a guide rod, a pin shaft, a hinge rod assembly and an elastic piece, wherein one end of the guide rod is hinged with the upper end of a connecting rod, a fastener is fixed at the other end of the guide rod, the pin shaft is sleeved on the guide rod and can slide along the axial direction of the guide rod, the elastic piece is sleeved on the guide rod between the fastener and the pin shaft, the hinge rod assembly comprises an upper hinge rod and a lower hinge rod, the upper end of the upper hinge rod and the lower end of the lower hinge rod are respectively hinged with the pin shaft, the upper end of the upper hinge rod is hinged with a lantern ring, and the lower end of the lower hinge rod is hinged with the lower end of the connecting rod.

On the basis of the technical scheme, preferably, the crank assembly comprises a rotating shaft, a crank and a driving motor, the rotating shaft is rotatably arranged at the top of the rack, the crank is eccentrically connected with the rotating shaft, an output shaft of the driving motor is connected with one end of the rotating shaft, and a lantern ring is sleeved on the outer circumference of the crank.

On the basis of the technical scheme, preferably, a first hinge part is arranged at the bottom of the lantern ring, a second hinge part is arranged on one side, away from the rack, of the lantern ring, the upper end of the connecting rod and one end of the guide rod are hinged with the first hinge part, and the upper end of the upper hinge rod is hinged with the second hinge part; the connecting rod is bent, the lower end of the connecting rod is far away from the rack, and the bent part of the connecting rod is hinged with the upper end of the connecting piece.

Preferably, the number of the upper hinge rods and the number of the lower hinge rods are two, the two upper hinge rods are respectively positioned on two sides of the lantern ring, the upper ends of the upper hinge rods are hinged with the second hinged part, and the lower ends of the lower hinge rods are hinged with the pin shaft; and the two lower hinged rods are respectively positioned at two sides of the connecting rod, the lower ends of the lower hinged rods are hinged with the lower end part of the connecting rod, and the upper ends of the upper hinged rods are hinged with the pin shaft.

Preferably, one end of the guide rod, which is close to the connecting rod assembly, is also fixedly provided with a hinge seat, and the hinge seat is respectively hinged with the upper end of the connecting rod and the first hinge part.

Preferably, the overload protection mechanism further comprises a limiting part, and the limiting part is fixedly arranged on the guide rod between the pin shaft and the hinge base.

On the basis of the technical scheme, preferably, an external thread is arranged on the outer peripheral wall of one end, away from the connecting rod assembly, of the guide rod, and an internal thread connected with the external thread is arranged on the fastener.

On the basis of the technical scheme, the automatic detection device is preferred and further comprises a monitoring device, the monitoring device comprises a sliding plate, a gear, an encoder and a fixed plate, the fixed plate is sleeved on the guide rod and fixedly connected with the fastener, a movable hole is formed in the fixed plate, one end of the sliding plate is fixedly connected with one end of the pin shaft and is parallel to the guide rod, the other end of the sliding plate penetrates through the movable hole, a sliding groove is formed in the bottom of the sliding plate, a sliding table connected with the sliding groove is arranged in the movable hole, teeth are arranged on the side wall of the fixed plate, the encoder is fixed on the fixed plate, the gear is connected with the encoder through a rotating shaft, and the gear is meshed with the teeth.

Further, preferably, the sliding plate is provided with two sliding plates symmetrically arranged on two sides of the guide rod.

Further, preferably, the monitoring device further comprises a communication component, the communication component comprises a single chip microcomputer and a wireless communication module, the encoder is connected with the single chip microcomputer, and the wireless communication module is connected with the single chip microcomputer and used for performing wireless communication with the terminal device.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention discloses an automobile part stamping device, when a plurality of automobile parts are simultaneously loaded on a rack, a slider drives a stamping die to complete stamping and bending of a workpiece by needing larger stamping force, and at the moment, a crank component applies overload stamping force to a connecting rod assembly, so that the connecting rod can deform and the workpiece cannot be stamped and damaged.

(2) One end of the guide rod is hinged with the upper end of the connecting rod and the first hinged part on the lantern ring, the upper hinged rod and the lower hinged rod are hinged with each other, meanwhile, the upper hinged rod is hinged with the lantern ring, and the lower hinged rod is hinged with the connecting rod, so that the connecting rod assembly can release redundant movement potential to the maximum extent under the driving of a crank under the action of a large load reaction force, and the deformation of the connecting rod and the damage of a punching machine are avoided; meanwhile, when the punching machine normally performs punching work, the overload protection mechanism keeps relatively static along with the connecting rod assembly, and the influence of force application on the connecting rod assembly caused by self-buffering movement of the overload protection mechanism is avoided.

(3) Be provided with the external screw thread on keeping away from link assembly's one end periphery wall through the guide bar, be provided with the internal thread that is connected with the external screw thread on the fastener, can adjust the elastic deformation power of elastic component through adjusting the position of fastener on the guide bar to adapt to different work piece punching press overload protection dynamics.

(4) Through setting up monitoring devices, can slide on the guide bar through the round pin axle when the work piece overlaps the punching press, drive the sliding plate and remove for the movable orifice on the fixed plate, the sliding plate drives gear revolve, gear angle of rotation will be carried out quantization by the encoder and detect to can calculate the displacement of sliding plate according to the tooth number of the gear and modulus, thereby can quantify the work piece and overlap quantity.

(5) Through setting up the communication subassembly, can be overloaded with the work piece punching press, the work piece that wireless communication module acquireed overlaps data and sends terminal equipment in real time, and the staff of being convenient for carries out control, analysis and early warning in real time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a stamping apparatus for automobile parts according to the present invention;

FIG. 2 is a schematic view of an assembly structure of the driving mechanism and the overload protection mechanism disclosed in the present invention;

FIG. 3 is a schematic view of an assembly structure of the overload protection mechanism and the monitoring device disclosed by the invention;

FIG. 4 is a schematic structural diagram of a monitoring device disclosed in the present invention;

FIG. 5 is a schematic structural diagram of a fixing plate disclosed in the present invention;

reference numerals:

1. a frame; 11. a slide rail; 2. a drive mechanism; 21. a crank assembly; 22. a connecting rod assembly; 23. a slider; 221. a collar; 222. a connecting rod; 223. a connecting member; 3. an overload protection mechanism; 31. a guide bar; 32. a pin shaft; 33. a hinge rod assembly; 34. an elastic member; 35. a fastener; 331. an upper hinge rod; 332. a lower hinge rod; 211. a rotating shaft; 212. a crank; 213. a drive motor; 2211. a first hinge portion; 2212. a second hinge portion; 311. a hinged seat; 36. a limiting member; 4. a monitoring device; 41. a sliding plate; 42. a gear; 43. an encoder; 44. a fixing plate; 441. a movable hole; 411. a chute; 4411. a sliding table; 412. teeth; 45. a communication component; 451. a single chip microcomputer; 452. a wireless communication module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1, and with reference to fig. 2 to 4, an embodiment of the present invention discloses an automobile part stamping device, which includes a frame 1, a driving mechanism 2, and an overload protection mechanism 3.

Wherein, the frame 1 is the main part of the stamping device and is in a vertical shape, and the frame 1 is provided with a slide rail 11.

The driving mechanism 2 includes a crank assembly 21, a connecting rod assembly 22 and a slider 23.

The crank assembly 21 is rotatably arranged at the top of the rack 1, the connecting rod assembly 22 comprises a sleeve ring 221, a connecting rod 222 and a connecting piece 223, the sleeve ring 221 is sleeved on the crank assembly 21, the upper end of the connecting rod 222 is hinged with the lower end of the sleeve ring 221, the upper end of the connecting piece 223 is hinged with the lower end of the connecting rod 222, the lower end of the connecting piece 223 is connected with the sliding block 23, and the sliding block 23 is slidably arranged on the sliding rail 11 and used for being connected with a stamping die; therefore, under the eccentric rotation motion of the crank assembly 21, the lantern ring 221 is driven to swing up and down, the lantern ring 221 drives the sliding block 23 to move up and down on the sliding rail 11 through the connecting rod 222 and the connecting piece 223, and the sliding block 23 drives the stamping die to perform stamping and bending operations on automobile parts.

When a plurality of automobile parts are fed on the rack 1 at the same time, the slider 23 drives the stamping die to complete the stamping and bending of the workpiece only with large stamping force, and at the moment, the crank assembly 21 applies overload stamping force to the connecting rod assembly 22, so that the connecting rod 222 deforms and the workpiece is stamped and fails.

The technical scheme adopted by the invention is that the overload protection mechanism 3 is arranged, specifically, the overload protection mechanism 3 comprises a guide rod 31, a pin shaft 32, a hinge rod assembly 33 and an elastic part 34, one end of the guide rod 31 is hinged with the upper end of a connecting rod 222, the other end of the guide rod 31 is fixed with a fastener 35, the pin shaft 32 is sleeved on the guide rod 31 and can slide along the axial direction of the guide rod 31, the elastic part 34 is sleeved on the guide rod 31 between the fastener 35 and the pin shaft 32, the hinge rod assembly 33 comprises an upper hinge rod 331 and a lower hinge rod 332, the upper end of the upper hinge rod 331 and the lower end of the lower hinge rod 332 are respectively hinged with the pin shaft 32, the upper end of the upper hinge rod 331 is connected with a sleeve ring 221, and the lower end of the lower hinge rod 332 is hinged with the lower end of a connecting rod 222.

With the arrangement, when the slider 23 encounters a large reaction force, and the crank assembly 21 applies a stamping force to the connecting rod 222, the slider can slide along the guide rod 31 through the hinge rod assembly 33 to compress the elastic piece 34, and the elastic piece 34 is used for absorbing redundant kinetic energy of the crank assembly 21, so that the connecting rod 222 does not continuously apply the stamping force downwards, the connecting rod 222 can be prevented from bearing large load deformation, the punch is prevented from being damaged, and meanwhile, stamping overload scrapping of workpiece materials can be reduced.

The invention is also realized by the following technical scheme.

In this embodiment, referring to fig. 2-4, the crank assembly 21 includes a rotating shaft 211, a crank 212 and a driving motor 213, the rotating shaft 211 is rotatably disposed on the top of the frame 1, the crank 212 is eccentrically connected to the rotating shaft 211, an output shaft of the driving motor 213 is connected to one end of the rotating shaft 211, and the collar 221 is disposed on an outer circumference of the crank 212. The rotation shaft 211 is rotated by the driving motor 213, and the crank 212 is eccentrically rotated. Under the action of the eccentric rotation of the crank 212, the lantern ring 221 is driven to do eccentric up-and-down motion.

As some preferred embodiments, the bottom of the collar 221 is provided with a first hinge 2211, the side of the collar 221 away from the frame 1 is provided with a second hinge 2212, the upper end of the connecting rod 222 and the end of the guide rod 31 are both hinged to the first hinge 2211, and the upper end of the upper hinge 331 is hinged to the second hinge 2212; the connecting rod 222 is bent, the lower end of the connecting rod 222 is far away from the machine frame 1, and the bent part of the connecting rod 222 is hinged with the upper end of the connecting piece 223.

Therefore, the overload protection device is arranged on the connecting rod assembly 22, when the slide block 23 is subjected to a large load, a large load reaction force can be applied to the connecting rod assembly 22, at this time, the slide block 23 cannot move downwards continuously due to the stamping load of a workpiece, the connecting rod 222 cannot move downwards continuously, redundant movement potential can be released to the maximum extent through the overload protection mechanism 3 under the driving of the crank 212, the deformation of the connecting rod 222 and the damage of a stamping machine are avoided, specifically, when the crank 212 drives the lantern ring 221 to move downwards, the lantern ring 221 drives the upper hinge rod 331 to push the pin shaft 32 to move on the guide rod 31, the connecting rod 222 keeps static at this time, the lower hinge rod 332 simultaneously pushes the pin shaft 32 to move on the guide rod 31, a parallelogram structure can be formed among the hinge rod assembly 33, the guide rod 31 and the connecting rod assembly 22, and the hinge rod assembly 33 can slide along the guide rod 31, further, the hinge rod assembly 33 compresses the elastic element 34, and the elastic element 34 is utilized to perform overload buffering, so that when the crank assembly 21 moves, redundant movement potential can be absorbed by the elastic element 34, and the crank assembly 21 is prevented from being continuously applied to the connecting rod 222; meanwhile, when the punch normally performs punching operation, the overload protection mechanism 3 keeps relatively static along with the connecting rod assembly 22, so that the influence of self-buffering movement on the force application of the connecting rod assembly 22 is avoided.

As some preferred embodiments, two upper hinge rods 331 and two lower hinge rods 332 are provided, the two upper hinge rods 331 are respectively located at two sides of the collar 221, the upper ends of the upper hinge rods 331 are hinged to the second hinge portion 2212, and the lower ends of the lower hinge rods 332 are hinged to the pin shaft 32; the two lower hinge rods 332 are respectively located at two sides of the connecting rod 222, the lower ends of the lower hinge rods 332 are hinged with the lower end of the connecting rod 222, and the upper ends of the upper hinge rods 331 are hinged with the pin shaft 32. With this arrangement, it is possible to ensure a stable parallelogram structure among the hinge rod assembly 33, the guide rod 31, and the link assembly 22, and to ensure structural strength during movement.

In this embodiment, a hinge base 311 is further fixedly disposed at one end of the guide rod 31 close to the link assembly 22, and the hinge base 311 is respectively hinged to the upper end of the link 222 and the first hinge portion 2211. Due to the arrangement, the guide rod 31 can be stably hinged with the sleeve ring 221 and the connecting rod 222 through the hinge seat 311, the structural strength is ensured, the guide rod 31 can flexibly rotate on the connecting rod assembly 22 along with the movement of the crank assembly 21 when the stamping device carries out overload protection, and the hinge rod assembly 33 can slide along the guide rod 31 while rotating.

In this embodiment, the overload protection mechanism 3 further includes a limiting member 36, and the limiting member 36 is fixedly disposed on the guide rod 31 between the pin 32 and the hinge seat 311. With the arrangement, after the hinge rod assembly 33 compresses the elastic element 34 and the crank assembly 21 eccentrically rotates to reset, the hinge rod assembly 33 can be driven to reset, and meanwhile, the position of the hinge rod assembly 33 is limited by the limiting element 36, so that the hinge rod assembly 33 is ensured to be within a reasonable moving range of the guide rod 31.

In some preferred embodiments, the outer peripheral wall of the end of the guide rod 31 remote from the connecting rod assembly 22 is provided with an external thread, and the fastening member 35 is provided with an internal thread connected to the external thread. Therefore, the elastic deformation force of the elastic piece 34 can be adjusted by adjusting the position of the fastening piece 35 on the guide rod 31, so that different workpiece punching overload protection forces can be adapted. For example, when the required stamping force of the part is small, the compression deformation of the elastic part 34 can be adjusted to be small, and when the required stamping force of the part is large, the fastening part 35 is moved towards the rack 1 along the guide rod 31 to compress the elastic part 34, so that the compression deformation of the elastic part 34 is increased, the elastic force of the elastic part 34 is increased, and the requirement of large stamping load buffer protection can be met.

When the automobile parts are stamped and bent, the thickness of the workpieces is basically not changed, but after a plurality of workpieces are stacked, the required stamping force can obviously rise, so that the stamping load of a stamping machine can be exceeded, particularly, on an automobile stamping production line, the stacking situation is easy to occur in the feeding process of a manipulator, the production line is fully-automatic in the current stage, the production line is basically unattended, when the workpieces are stacked, stamped and overloaded, although the overload protection mechanism 3 can perform buffer protection to avoid the connecting rod 222 and the products from being damaged, the products can be failed in stamping because the stamping force of the stamping machine is absorbed by the overload protection mechanism 3, and the products can be failed in stamping, and the manipulator can take out the products which are failed in stamping and flow into a lower end station, so that the product requirements are not met in the rear-end automobile assembling process.

To this end, the present invention further proposes a modified solution based on the above technical solution, specifically, referring to fig. 3-5, a monitoring device 4 is provided, the monitoring device 4 comprises a sliding plate 41, a gear 42, an encoder 43 and a fixed plate 44, the fixed plate 44 is sleeved on the guide rod 31 and fixedly connected with the fastening piece 35, a movable hole 441 is arranged on the fixed plate 44, one end of the sliding plate 41 is fixedly connected with one end of the pin shaft 32, and the sliding plate 41 is parallel to the guide bar 31, the other end of the sliding plate 41 passes through the movable hole 441, the sliding slot 411 is opened at the bottom of the sliding plate 41, a sliding table 4411 connected with the sliding slot 411 is provided in the movable hole 441, the tooth 412 is provided on the side wall of the fixed plate 44, the encoder 43 is fixed on the fixing plate 44, the gear 42 is connected with the encoder 43 through a rotating shaft, and the gear 42 is meshed with the teeth 412.

Therefore, when workpieces are stamped in an overlapped mode, the sliding plate 41 is driven to move relative to the movable hole 441 on the fixed plate 44 by sliding the pin shaft 32 on the guide rod 31, the sliding plate 41 slides in cooperation with the sliding table 4411 in the movable hole 441 through the sliding groove 411 at the bottom, so that the sliding plate 41 is ensured to slide stably, the sliding plate 41 drives the gear 42 to rotate, the rotation angle of the gear 42 is quantitatively detected by the encoder 43, the displacement of the sliding plate 41 can be indirectly calculated according to the tooth number and the modulus of the gear 42, the overlapped quantity of the workpieces can be quantized, and the overlapped quantity of the workpieces can be fed back to a terminal through the monitoring device 4. The terminal can control the manipulator to transfer the work piece of this part to appointed position and carry out recheck or maintenance, avoids flowing into on the production line, and simultaneously, feedback data can also make statistics of the trouble that the manipulator material loading exists within a certain period, can remind the staff to carry out analysis or early warning.

Further, the monitoring device 4 further comprises a communication assembly 45, the communication assembly 45 comprises a single chip microcomputer 451 and a wireless communication module 452, the encoder 43 is connected with the single chip microcomputer 451, and the wireless communication module 452 is connected with the single chip microcomputer 451 and used for performing wireless communication with the terminal device. The encoder 43 inputs the rotation displacement amount to the single chip microcomputer 451, the single chip microcomputer 451 performs data conversion, and the displacement of the sliding plate 41 is indirectly calculated according to the number of teeth and the modulus of the gear 42, because the thickness of the workpiece is uniform, the number of overlapped workpieces can be quantified. Data can be transmitted to the terminal equipment through the wireless communication module 452, the terminal equipment can know that the phenomenon of stamping overload appears in a certain time period, and when the phenomenon of stamping overload repeatedly appears, the terminal equipment can send out an early warning to remind a worker to stop the machine for maintenance.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An automobile parts stamping device characterized by, includes:

the device comprises a rack (1), wherein a slide rail (11) is arranged on the rack (1);

the driving mechanism (2) comprises a crank (212) assembly (21), a connecting rod (222) assembly (22) and a sliding block (23), the crank (212) assembly (21) is rotatably arranged at the top of the rack (1), the connecting rod (222) assembly (22) comprises a sleeve ring (221), a connecting rod (222) and a connecting piece (223), the sleeve ring (221) is sleeved on the crank (212) assembly (21), the upper end of the connecting rod (222) is hinged with the lower end of the sleeve ring (221), the upper end of the connecting piece (223) is hinged with the lower end of the connecting rod (222), the lower end of the connecting piece (223) is connected with the sliding block (23), and the sliding block (23) is slidably arranged on the sliding rail (11) and used for being connected with a stamping die;

overload protection mechanism (3), including guide bar (31), round pin axle (32), hinge rod subassembly (33) and elastic component (34), the one end of guide bar (31) is connected with the upper end hinge of connecting rod (222), and the other end of guide bar (31) is fixed with fastener (35), round pin axle (32) cover is established on guide bar (31), can slide along guide bar (31) axial direction, and elastic component (34) cover is established on guide bar (31) that the place between fastener (35) and round pin axle (32), and hinge rod subassembly (33) include upper hinge rod (331) and lower hinge rod (332), and the upper end of upper hinge rod (331) and the lower extreme of lower hinge rod (332) are connected with round pin axle (32) hinge respectively, and the upper end of upper hinge rod (331) is connected with lantern ring (221) hinge, and the lower extreme of lower hinge rod (332) is connected with the lower tip hinge of connecting rod (222).

2. The automobile part stamping device as recited in claim 1, wherein: crank (212) subassembly (21) is including pivot (211), crank (212) and driving motor (213), pivot (211) are rotated and are set up at frame (1) top, crank (212) are connected with pivot (211) off-centre, and the output shaft of driving motor (213) is connected with the one end of pivot (211), and lantern ring (221) cover is established on crank (212) outer periphery.

3. The automobile part stamping device as recited in claim 1, wherein: a first hinge part (2211) is arranged at the bottom of the lantern ring (221), a second hinge part (2212) is arranged on one side, away from the rack (1), of the lantern ring (221), the upper end of the connecting rod (222) and one end of the guide rod (31) are hinged to the first hinge part (2211), and the upper end of the upper hinge rod (331) is hinged to the second hinge part (2212); the connecting rod (222) is bent, the lower end of the connecting rod (222) is far away from the rack (1), and the bent part of the connecting rod (222) is hinged with the upper end of the connecting piece (223).

4. The automobile part stamping device as recited in claim 3, wherein: the two upper hinge rods (331) and the two lower hinge rods (332) are respectively arranged, the two upper hinge rods (331) are respectively positioned at two sides of the lantern ring (221), the upper ends of the upper hinge rods (331) are hinged with the second hinge parts (2212), and the lower ends of the lower hinge rods (332) are hinged with the pin shaft (32); the two lower hinge rods (332) are respectively positioned at two sides of the connecting rod (222), the lower ends of the lower hinge rods (332) are hinged with the lower end part of the connecting rod (222), and the upper ends of the upper hinge rods (331) are hinged with the pin shaft (32).

5. The automobile part stamping device as recited in claim 1, wherein: one end of the guide rod (31) close to the connecting rod (222) component (22) is also fixedly provided with a hinge seat (311), and the hinge seat (311) is respectively hinged with the upper end of the connecting rod (222) and the first hinge part (2211).

6. The automobile part stamping device as recited in claim 5, wherein: the overload protection mechanism (3) further comprises a limiting piece (36), and the limiting piece (36) is fixedly arranged on the guide rod (31) between the pin shaft (32) and the hinge base (311).

7. The automobile part stamping device as recited in claim 1, wherein: an external thread is arranged on the peripheral wall of one end, far away from the connecting rod (222) component (22), of the guide rod (31), and an internal thread connected with the external thread is arranged on the fastening piece (35).

8. The automobile part stamping device as recited in claim 7, wherein: the monitoring device (4) comprises a sliding plate (41), a gear (42), an encoder (43) and a fixed plate (44), the fixed plate (44) is sleeved on the guide rod (31) and fixedly connected with the fastening piece (35), a movable hole (441) is formed in the fixed plate (44), one end of the sliding plate (41) is fixedly connected with one end of the pin shaft (32), the sliding plate (41) is parallel to the guide rod (31), the other end of the sliding plate (41) penetrates through the movable hole (441), a sliding groove (411) is formed in the bottom of the sliding plate (41), a sliding table (4411) connected with the sliding groove (411) is arranged in the movable hole (441), teeth (412) are arranged on the side wall of the fixed plate (44), the encoder (43) is fixed on the fixed plate (44), and the gear (42) is connected with the encoder (43) through a rotating shaft, the gear (42) is in meshed connection with the teeth (412).

9. The automobile part stamping device as recited in claim 8, wherein: the two sliding plates (41) are symmetrically arranged on two sides of the guide rod (31).

10. The automobile part stamping device as recited in claim 8, wherein: the monitoring device (4) further comprises a communication assembly (45), the communication assembly (45) comprises a single chip microcomputer (451) and a wireless communication module (452), the encoder (43) is connected with the single chip microcomputer (451), and the wireless communication module (452) is connected with the single chip microcomputer (451) and used for carrying out wireless communication with terminal equipment.