CN111283085A

CN111283085A - Metal stamping process and metal stamping die

Info

Publication number: CN111283085A
Application number: CN202010167706.2A
Authority: CN
Inventors: 范丹丹
Original assignee: Shanghai Aslang Technology Co ltd
Current assignee: Shanghai Aslang Technology Co ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-06-16

Abstract

The invention belongs to the technical field of stamping processing, and particularly relates to a metal stamping process and a metal stamping die; the metal stamping die comprises a top plate, a pressing plate, a bottom plate, a power unit and a lubricating unit; the power unit comprises an upper die, a lower die and a compression leg; the lubricating unit comprises a rack, a gear and an oil brush; the oil brush is connected in the cavity in a sliding mode through a spring, the top end of the oil brush penetrates through the surface of the lower die, and a first support rod is arranged on the side wall, close to the gear, of the oil brush; the lower die is covered with one layer of lubricating oil through the cooperation of the top plate, the pressing plate, the bottom plate, the power unit and the lubricating unit, so that the demolding resistance is reduced, the stamping processing quality of blanks is guaranteed, the working personnel are greatly facilitated, and the push rod does not generate thrust for the first supporting rod along with the continuous rotation of the gear, so that the oil brush is reset under the elastic action of the spring, and the oil brush is prevented from blocking and influencing the stamping technological process.

Description

Metal stamping process and metal stamping die

Technical Field

The invention belongs to the technical field of stamping processing, and particularly relates to a metal stamping process and a metal stamping die.

Background

The stamping is a forming method in which a press and a die are used to apply external force to a plate, a strip, a pipe, a profile, etc. to cause plastic deformation or separation, thereby obtaining a workpiece (stamped part) of a desired shape and size. Stamping and forging are plastic working (or called pressure working), and are called forging and pressing. The stamped blanks are mainly hot and cold rolled steel sheets and strips. In the world, 60-70% of steel materials are plates, and most of the plates are punched to form finished products. The body, chassis, oil tank, radiator sheet, boiler steam drum, shell of container, iron core silicon steel sheet of motor and electric appliance are all made by punching. There are also a large number of stamped parts in products such as instruments, household appliances, bicycles, office machines, and household utensils. The stamping process is a production technology for obtaining product parts with certain shape, size and performance by directly applying deformation force to a plate in a die by means of the power of conventional or special stamping equipment and deforming the plate. The plate, the die and the equipment are three elements of stamping processing. The hot stamping and the cold stamping are divided according to the stamping processing temperature. The former is suitable for processing sheet materials with high deformation resistance and poor plasticity; the latter is carried out at room temperature and is a common stamping method for thin sheets. It is one of the main methods of metal plastic working (or pressure working), and also belongs to the material forming engineering technology. The die used for stamping is called stamping die, and is called stamping die for short. A die is a special tool for batch processing of material (metallic or non-metallic) into the desired punches. The stamping die is of great importance in stamping, and batch stamping production is difficult to carry out without the stamping die meeting the requirements; without an advanced die, an advanced stamping process cannot be achieved. The three elements of the stamping process, the die, the stamping equipment and the stamping material form the stamping processing, and the stamping part can be obtained only by combining the three elements.

Some technical schemes related to a metal stamping process and a metal stamping die also appear in the prior art, for example, a chinese patent with application number 2018102837894 discloses a stamping die and a stamping process, and belongs to the technical field of stamping forming. The stamping die comprises an upper extruding punch and a lower extruding punch, wherein an inwards concave first annular groove is formed in the lower end face of the upper extruding punch, an inwards concave second annular groove is also formed in the upper end face of the lower extruding punch, the sum of the depth of the first annular groove and the depth of the second annular groove is equal to 0.2 +/-0.05 mm, and the width of the first annular groove is equal to that of the second annular groove and is larger than that of a material belt. By means of the structure, materials on the peripheries of the first annular groove and the second annular groove can be gathered in the first annular groove and the second annular groove in the stamping process, so that a product with the thickness of 2.1mm can be stamped by a material belt with the thickness of 1.9mm, and the requirement on the thickness of the product can be met. The invention has simple structure, short processing period and low cost, and the common standard material belt can be manufactured into products meeting the requirements through the stamping and extruding process of the stamping die; but the technical scheme does not solve the problem of high demoulding difficulty in the prior art; in the process of bending the metal plate, the metal plate is extremely easy to clamp on the inner side wall of the lower die, so that the demolding difficulty after the blank is formed is increased, the surface of the die and the surface of the blank are damaged, the whole service life of the die is influenced, and the stamping quality of the blank is reduced.

Disclosure of Invention

In order to make up the defects of the prior art, the problem that the metal plate is extremely easy to clamp on the inner side wall of the lower die or the outer side wall of the upper die in the process of bending the metal plate is solved, so that the demolding difficulty after the blank is formed is increased, and even the surface of the die and the surface of the blank are damaged, thereby not only influencing the overall service life of the die, but also reducing the stamping quality of the blank; the invention provides a metal stamping process and a metal stamping die.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a metal stamping die which comprises a top plate, a pressing plate, a bottom plate, a power unit and a lubricating unit, wherein the top plate is provided with a first hole; the pressing plate is arranged on the bottom plate through a first air cylinder, and a piston cylinder is arranged between the pressing plate and the bottom plate; a piston rod is connected in the piston cylinder in a sliding manner; the top plate is arranged on the pressure plate through a second air cylinder; the power unit comprises an upper die, a lower die and a compression column; the upper die is arranged on the side wall of the bottom end of the pressing plate; the lower die is arranged on the side wall of the top end of the bottom plate, the lower die corresponds to the upper die in position, and a cavity is formed in the lower die; the pressing column is arranged on the side wall of the top end of the pressing plate, and the top end of the pressing column penetrates through the top end of the top plate; the lubricating unit comprises a rack, a gear and an oil brush; the gear is rotationally connected to the side wall of the cavity, and a wheel disc of the gear is fixedly connected with a push rod; the rack is connected in the cavity in a sliding mode, the rack is meshed with the gear, the tail end of the rack penetrates into the piston cylinder, and the tail end of the rack is provided with a trapezoidal block; the oil brush is connected in the cavity in a sliding mode through a spring, the top end of the oil brush penetrates through the surface of the lower die, and a first support rod is arranged on the side wall, close to the gear, of the oil brush; the surface of the lower die is covered with a layer of lubricating oil through the matching of the top plate, the pressing plate, the bottom plate, the power unit and the lubricating unit, so that the demoulding resistance is reduced; when the stamping device works, when a workpiece is stamped, pressure is applied to the compression leg through the press machine, so that the compression leg is driven to move towards the direction close to the bottom plate, the compression leg extrudes the piston rod in the movement process, the piston rod slides in the piston cylinder, the bottom end of the piston rod extrudes the trapezoidal block in the sliding process of the piston rod, so that the rack is pushed through the trapezoidal block, the gear is driven to rotate when the rack is stressed to slide towards the direction close to the gear, the gear generates jacking force on the first supporting rod through the push rod in the rotating process, so that the oil brush is jacked up, the oil brush is contacted with the side wall of the lower die in the jacking process of the oil brush, a layer of lubricating oil layer is formed on the surface of the lower die, the friction resistance between the metal plate and the lower die in the forming process is reduced, the demoulding difficulty after the blank is formed is effectively reduced, and the stamping processing quality of the blank is, the push rod does not generate thrust on the first supporting rod along with the continuous rotation of the gear, so that the oil brush is reset under the elastic action of the spring, and the oil brush is prevented from blocking and influencing the stamping process.

Preferably, an oil tank is arranged in the cavity close to the oil brush; the oil tank is provided with a material conveying pipe, and a plurality of sealing strips are arranged at the end part of the oil tank close to the material conveying pipe; the side wall of the oil brush close to the oil tank is provided with a second supporting rod, and the second supporting rod is provided with a through hole, so that the sealing strip and the material conveying pipe are in sliding connection in the through hole; the lubricating oil in the oil brush is supplemented in time through the matching of the oil tank, the material conveying pipe, the sealing strip and the second support rod; when the oil brush is in use, timely lubricating oil supplement can be obtained, and the whole practicability and the use effect of the die are enhanced.

Preferably, a pressing block is arranged at the bottom end of the piston rod; the pressing block consists of a rubber bag and a first plate; the first plate is arranged at the bottom end of the piston rod, a sliding groove is formed in the side wall, close to the rack, of the first plate, and a second plate is connected in the sliding groove in a sliding mode; the rubber bag is arranged at the bottom end of the first plate; the end part, far away from the rack, of the second plate is hinged with a connecting rod, and the connecting rod slides on the side wall of the rubber bag through a roller; the sliding range of the rack is increased through the matching of the piston rod, the pressing block, the second plate and the connecting rod; when the device works, when a workpiece is punched, pressure is applied to the compression leg through the press machine, so that the compression leg is driven to move towards the direction close to the bottom plate, the compression leg extrudes the piston rod in the movement process, the piston rod slides in the piston cylinder, the pressing block can be in contact with the trapezoidal block and extrudes the trapezoidal block in the sliding process of the piston rod, the pressing block completely pushes the trapezoidal block out of the piston cylinder along with the continuous sliding of the piston rod, the pressing block is in contact with the inner side wall at the bottom end of the piston cylinder, the rubber bag is pressed, the connecting rod is driven to slide on the inner side wall of the rubber bag in the pressing process of the rubber bag, thrust is generated on the second plate in the sliding process of the connecting rod, so that the second plate is pushed to slide out of the sliding groove, the second plate continuously applies pressure to the trapezoidal block in the sliding-out process, the sliding range of, thereby guarantee before lower mould and metal sheet contact, the push rod no longer produces thrust to a branch, effectively avoid the oil brush to the influence that the stamping process caused, guaranteed the validity of mould operation.

Preferably, the oil brush consists of a sponge, a first pipe and a second pipe; the first tube is connected in the second tube in a sliding mode, and a spiral groove is formed in the outer side wall of the first tube; an L-shaped rod is arranged on the side wall of the cavity close to the first tube, and the end part of the L-shaped rod is slidably embedded into the spiral groove; the sponge is arranged on the side wall of the top end of the first tube; the lubricating oil on the oil brush is fully utilized through the matching of the sponge, the first pipe, the second pipe and the L-shaped rod; the during operation, the gear is at the rotation in-process through the push rod to a branch production jacking force, thereby with the oil brush jack-up, the oil brush is when by the jack-up, equal rebound of a pipe and No. two pipes, at the in-process of a pipe rebound, L shape pole slides in spiral groove, thereby make a pipe rotate No. two intraductally when rebound, thereby drive the sponge and rotate, make the surface homoenergetic of sponge and the lower mould lateral wall between contact, guaranteed to carry out make full use of to the lubricating oil on sponge surface, thereby realized the sufficient lubrication to the lower mould lateral wall, reduce the drawing of patterns degree of difficulty of blank.

Preferably, a buffer cushion is arranged on the side wall of the bottom end of the first supporting rod through a spring, so that the buffer effect between the push rod and the first supporting rod is realized; when the stamping device works, when a workpiece is stamped, pressure is applied to the compression leg through the press machine, so that the compression leg is driven to move towards the direction close to the bottom plate, the compression leg extrudes the piston rod in the movement process, the piston rod slides in the piston cylinder, the bottom end of the piston rod extrudes the trapezoidal block in the sliding process of the piston rod, so that thrust is generated on the rack through the trapezoidal block, when the rack is stressed to slide towards the direction close to the gear, the gear is driven to rotate, the gear generates jacking force on the first supporting rod through the push rod in the rotating process, in the contact process of the push rod and the first supporting rod, the push rod and the first supporting rod are impacted, in order to avoid the impact from damaging the push rod and the first supporting rod, the buffer cushion is arranged on the side wall of the bottom end of the first supporting rod through the spring, so that the push rod firstly passes through the double buffering of the spring and the buffer cushion before, effectively reduce the inertia that the gear produced at the rotation in-process and to the influence that push rod and branch caused, guaranteed the holistic life of mould.

Preferably, the sponge is frustum-shaped, the size of the end part of the sponge close to the first pipe is smaller, and the size of the end part far away from the first pipe is larger, so that the resistance applied to the oil brush during contraction is reduced; the during operation, along with the rotation of gear, the push rod produces thrust to a branch, and along with the continuous rotation of gear, the push rod continuously slides on a branch surface, no longer produce thrust to the push rod until a branch, then the oil brush takes place to reset under the spring action of spring, the sponge also contracts again in the cavity, for reducing the sponge at the in-process that retracts the cavity, the sliding resistance that the cavity lateral wall produced to the sponge, establish the sponge into frustum shape, and the tip size that the sponge is close to a pipe is less, the tip size of keeping away from a pipe is great, thereby the resistance that receives when effectively having reduced the sponge shrink, avoid the sponge because of the damage that sliding resistance caused at the shrink in-process.

A metal stamping process is suitable for the metal stamping die and comprises the following steps:

s1: determining the size of the metal plate according to the shape of the required part, cleaning the surface of the cut metal plate to avoid the influence of stains adhered on the surface of the metal plate on the stamping effect, and heating the metal plate after the metal plate is cleaned to ensure that the water stains on the surface of the metal plate are heated and evaporated and the volume of the metal plate is expanded;

s2: polishing the expanded metal plate surface processed by the S1 to remove burrs on the metal plate surface, and avoiding the damage of the burrs on the metal plate surface to the die and the metal plate surface in the stamping process, thereby influencing the whole service life of the die and the stamping quality of the metal plate;

s3: and (3) placing the metal plate processed in the step (S2) into a working position of a metal stamping die, stamping the metal plate by using the metal stamping die to obtain a blank in a basic shape, polishing the surface of the blank for the second time to remove burrs generated on the surface of the blank due to stamping, and finally cleaning the surface of the blank to prevent the stamped waste from being adhered to the surface of the blank.

The invention has the following beneficial effects:

1. according to the metal stamping process and the metal stamping die, the lubricating oil layer is covered on the surface of the lower die through the matching of the top plate, the pressing plate, the bottom plate, the power unit and the lubricating unit, so that the demolding resistance is reduced, the stamping processing quality of blanks is guaranteed, great convenience is brought to workers, and the push rod does not generate thrust to the first supporting rod along with the continuous rotation of the gear, so that the oil brush is reset under the elastic action of the spring, and the blocking and influence of the oil brush on the stamping process are avoided.

2. According to the metal stamping process and the metal stamping die, the oil tank, the delivery pipe, the sealing strip and the second support rod are matched to avoid waste caused by the fact that part of lubricating oil overflows from the delivery pipe when the delivery pipe is not in contact with the oil brush, so that the delivery pipe can be opened and closed correspondingly according to the position of the oil brush, the effective utilization of the lubricating oil is further enhanced, the oil brush can be ensured to be replenished with the lubricating oil timely in the using process, and the overall practicability and using effect of the die are enhanced.

Drawings

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

FIG. 1 is a flow chart of the stamping process of the present invention;

FIG. 2 is a perspective view of a metal stamping die of the present invention;

FIG. 3 is a cross-sectional view of a metal stamping die of the present invention;

FIG. 4 is a partial enlarged view of FIG. 3 at A;

FIG. 5 is a partial enlarged view of FIG. 3 at B;

in the figure: the device comprises a top plate 1, a pressing plate 2, a first air cylinder 21, a piston cylinder 22, a piston rod 221, a second air cylinder 23, a pressing block 24, a rubber bag 241, a first plate 242, a sliding groove 243, a second plate 244, a connecting rod 245, a bottom plate 3, a power unit 4, an upper die 41, a lower die 42, a pressing column 43, a cavity 44, an oil tank 441, a material conveying pipe 442, a sealing strip 443, an L-shaped rod 444, a lubricating unit 5, a rack 51, a trapezoidal block 511, a gear 52, a push rod 521, an oil brush 53, a first support rod 531, a second support rod 532, a through hole 533, a sponge 534, a first pipe 535, a second pipe 536 and a cushion 537.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, the metal stamping die according to the present invention includes a top plate 1, a pressure plate 2, a bottom plate 3, a power unit 4 and a lubrication unit 5; the pressing plate 2 is arranged on the bottom plate 3 through a first air cylinder 21, and a piston cylinder 22 is arranged between the pressing plate 2 and the bottom plate 3; a piston rod 221 is connected in the piston cylinder 22 in a sliding manner; the top plate 1 is arranged on the pressure plate 2 through a second air cylinder 23; the power unit 4 comprises an upper die 41, a lower die 42 and a compression leg 43; the upper die 41 is arranged on the side wall of the bottom end of the pressure plate 2; the lower die 42 is arranged on the side wall of the top end of the bottom plate 3, the positions of the lower die 42 and the upper die 41 correspond, and a cavity 44 is formed in the lower die 42; the pressing column 43 is arranged on the side wall of the top end of the pressing plate 2, and the top end of the pressing column 43 penetrates to the top end of the top plate 1; the lubricating unit 5 comprises a rack 51, a gear 52 and an oil brush 53; the gear 52 is rotatably connected to the side wall of the cavity 44, and a wheel disc of the gear 52 is fixedly connected with a push rod 521; the rack 51 is connected in the cavity 44 in a sliding manner, the rack 51 is meshed with the gear 52, the tail end of the rack 51 penetrates into the piston cylinder 22, and a trapezoidal block 511 is arranged at the tail end of the rack 51; the oil brush 53 is slidably connected in the cavity 44 through a spring, the top end of the oil brush 53 penetrates through the surface of the lower die 42, and a first support rod 531 is arranged on the side wall of the oil brush 53 close to the gear 52; the surface of the lower die 42 is covered with a layer of lubricating oil through the matching of the top plate 1, the pressing plate 2, the bottom plate 3, the power unit 4 and the lubricating unit 5, so that the demoulding resistance is reduced; when the stamping device works, when a workpiece is stamped, a press machine is used for applying pressure to the compression leg 43, so that the compression plate 2 is driven to move towards the direction close to the bottom plate 3, the compression plate 2 extrudes the piston rod 221 in the movement process, the piston rod 221 slides in the piston cylinder 22, in the sliding process of the piston rod 221, the bottom end of the piston rod 221 extrudes the trapezoidal blocks 511, so that the trapezoidal blocks 511 generate thrust on the rack 51, when the rack 51 is forced to slide towards the direction close to the gear 52, the gear 52 is driven to rotate, the gear 52 generates jacking force on the first supporting rod 531 through the push rod 521 in the rotation process, so that the oil brush 53 is jacked up, in the jacking process of the oil brush 53, the oil brush 53 is in contact with the side wall of the lower die 42, a layer of lubricating oil layer is formed on the surface of the lower die 42, so that the friction resistance between the metal plate and the lower die 42 in the forming process is reduced, and the demolding difficulty after, the stamping quality of the blank is guaranteed, the blank is greatly convenient and easy for workers, and along with the continuous rotation of the gear 52, the push rod 521 does not generate thrust on the first supporting rod 531 any more, so that the oil brush 53 is reset under the elastic action of the spring, and the blocking and the influence of the oil brush 53 on the stamping process are avoided.

As an embodiment of the present invention, an oil tank 441 is disposed in the cavity 44 near the oil brush 53; the oil tank 441 is provided with a material conveying pipe 442, and a plurality of sealing strips 443 are arranged at the end part of the oil tank 441 close to the material conveying pipe 442; a second support rod 532 is arranged on the side wall of the oil brush 53 close to the oil tank 441, and a through hole 533 is arranged on the second support rod 532, so that the sealing strip 443 and the delivery pipe 442 are slidably connected in the through hole 533; the lubricating oil in the oil brush 53 is supplemented in time through the matching of the oil tank 441, the material conveying pipe 442, the sealing strip 443 and the second support rod 532; when the oil brush 53 is not jacked up, the through hole 533 does not generate a binding force on the sealing strip 443 and the delivery pipe 442 at this time, the delivery pipe 442 contacts with the oil brush 53 to supply oil to the oil brush 53, when the oil brush 53 is jacked up, the second support rod 532 is driven to slide, when the second pole piece 532 slides away from the oil tank 441, the tightening force of the through hole 533 to the material delivery pipe 442 and the sealing strip 443 is increased, thereby clamping the feed delivery pipe 442 by the sealing strip 443 and avoiding the waste of a part of the lubricating oil which overflows from the feed delivery pipe 442 when the feed delivery pipe 442 is not in contact with the oil wiper 53, therefore, the material conveying pipe 442 can be correspondingly opened and closed according to the position of the oil brush 53, the effective utilization of the lubricating oil is further enhanced, and the oil brush 53 is ensured to be in use, can obtain timely lubricating oil supplement, and enhances the overall practicability and use effect of the die.

As an embodiment of the present invention, the bottom end of the piston rod 221 is provided with a pressing block 24; the pressing block 24 consists of a rubber bag 241 and a first plate 242; the first plate 242 is installed at the bottom end of the piston rod 221, a sliding groove 243 is formed in the side wall of the first plate 242 close to the rack 51, and a second plate 244 is connected in the sliding groove 243 in a sliding mode; the rubber bag 241 is arranged at the bottom end of a first plate 242; the end part of the second plate 244 far away from the rack 51 is hinged with a connecting rod 245, and the connecting rod 245 slides on the side wall of the rubber bag 241 through a roller; the sliding range of the rack 51 is increased through the cooperation of the piston rod 221, the pressing block 24, the second plate 244 and the connecting rod 245; when the punching press is in work, when a workpiece is punched, the press column 43 is pressed by the press machine, so that the press plate 2 is driven to move towards the direction close to the bottom plate 3, the press plate 2 extrudes the piston rod 221 in the movement process, the piston rod 221 slides in the piston cylinder 22, the press block 24 is in contact with and extrudes the trapezoidal block 511 in the sliding process of the piston rod 221, the press block 24 completely pushes the trapezoidal block 511 out of the piston cylinder 22 along with the continuous sliding of the piston rod 221, at the moment, the press block 24 is in contact with the inner side wall at the bottom end of the piston cylinder 22, the rubber bag 241 is pressed, the connecting rod 245 is driven to slide on the inner side wall of the rubber bag 241 in the pressing process of the rubber bag 241, a thrust is generated on the second plate 244 in the sliding process of the connecting rod 245, so that the second plate 244 is pushed to slide out from the sliding groove 243, and the second plate, therefore, the sliding range of the rack 51 is expanded, the rotating angle of the gear 52 is further increased, and therefore the push rod 521 can not generate thrust on the first support rod 531 any more before the lower die 42 is contacted with the metal plate, the influence of the oil brush 53 on the stamping process is effectively avoided, and the effectiveness of the operation of the die is ensured.

As an embodiment of the present invention, the oil brush 53 is composed of a sponge 534, a first tube 535 and a second tube 536; the first tube 535 is connected in the second tube 536 in a sliding manner, and a spiral groove is formed on the outer side wall of the first tube 535; the cavity 44 is provided with an L-shaped rod 444 on the side wall close to the first tube 535, and the end part of the L-shaped rod 444 is embedded into the spiral groove in a sliding way; the sponge 534 is arranged on the side wall of the top end of the first tube 535; the lubricating oil on the oil brush 53 is fully utilized through the matching of the sponge 534, the first pipe 535, the second pipe 536 and the L-shaped rod 444; during operation, gear 52 produces the jacking force through push rod 521 to a branch 531 in the rotation process, thereby with oil brush 53 jack-up, oil brush 53 is when by jack-up, a tub 535 and No. two tubs 536 all upwards move, in the in-process of a tub 535 rebound, L shape pole 444 slides in the spiral groove, thereby make a tub 535 rotate in No. two tubs 536 when the rebound, thereby drive sponge 534 and rotate, make the surface of sponge 534 all can and the lower mould 42 between the lateral wall contact, guaranteed to carry out make full use of to the lubricating oil on sponge 534 surface, thereby realized the full lubrication to lower mould 42 lateral wall, reduce the drawing of patterns degree of difficulty of blank.

As an embodiment of the present invention, a buffer pad 537 is mounted on the bottom end side wall of the first support rod 531 through a spring, so as to achieve a buffer effect between the push rod 521 and the first support rod 531; in operation, when a workpiece is punched, a press machine applies pressure to the press column 43 to drive the press plate 2 to move towards a direction close to the bottom plate 3, the press plate 2 extrudes the piston rod 221 during movement, so that the piston rod 221 slides in the piston cylinder 22, during sliding of the piston rod 221, the bottom end of the piston rod 221 extrudes the trapezoidal blocks 511, so that thrust is generated on the rack 51 through the trapezoidal blocks 511, when the rack 51 is forced to slide towards a direction close to the gear 52, the gear 52 is driven to rotate, the gear 52 generates top force on the first support rod 531 through the push rod 521 during rotation, during contact between the push rod 521 and the first support rod 531, the push rod 521 collides with the first support rod 531, in order to avoid damage to the push rod 521 and the first support rod 531 caused by the collision, a cushion 537 is mounted on the side wall of the bottom end of the first support rod 531 through a spring, therefore, before the push rod 521 is in contact with the first support rod 531, the double buffering of the spring and the buffering cushion 537 is firstly carried out, so that the influence of inertia generated by the gear 52 in the rotating process on the push rod 521 and the first support rod 531 is effectively reduced, and the service life of the whole die is ensured.

As an embodiment of the present invention, the sponge 534 is frustum-shaped, and the size of the end of the sponge 534 close to the first tube 535 is smaller, and the size of the end far away from the first tube 535 is larger, so as to reduce the resistance suffered by the oil brush 53 during contraction; during operation, along with the rotation of the gear 52, the push rod 521 generates thrust on the first supporting rod 531, and along with the continuous rotation of the gear 52, the push rod 521 continuously slides on the surface of the first supporting rod 531 until the first supporting rod 531 does not generate thrust on the push rod 521 any more, the oil brush 53 is reset under the elastic force of the spring, the sponge 534 is retracted into the cavity 44 again, in order to reduce the sliding resistance of the side wall of the cavity 44 on the sponge 534 in the process of retracting the sponge 534 into the cavity 44, the sponge 534 is set to be in a frustum shape, the size of the end, close to the first pipe 535, of the sponge 534 is smaller, and the size of the end, far away from the first pipe 535, is larger, so that the resistance applied when the sponge 534 contracts is effectively reduced, and the damage of the sponge 534 caused by the sliding resistance in the contraction.

When the stamping device works, when a workpiece is stamped, a press machine is used for applying pressure to the compression leg 43, so that the compression plate 2 is driven to move towards the direction close to the bottom plate 3, the compression plate 2 extrudes the piston rod 221 in the movement process, the piston rod 221 slides in the piston cylinder 22, in the sliding process of the piston rod 221, the bottom end of the piston rod 221 extrudes the trapezoidal blocks 511, so that the trapezoidal blocks 511 generate thrust on the rack 51, when the rack 51 is forced to slide towards the direction close to the gear 52, the gear 52 is driven to rotate, the gear 52 generates jacking force on the first supporting rod 531 through the push rod 521 in the rotation process, so that the oil brush 53 is jacked up, in the jacking process of the oil brush 53, the oil brush 53 is in contact with the side wall of the lower die 42, a layer of lubricating oil layer is formed on the surface of the lower die 42, so that the friction resistance between the metal plate and the lower die 42 in the forming process is reduced, and the demolding difficulty after, the stamping processing quality of the blank is guaranteed, great convenience is brought to workers, and with the continuous rotation of the gear 52, the push rod 521 does not generate thrust on the first supporting rod 531 any more, so that the oil brush 53 is reset under the elastic action of the spring, and the oil brush 53 is prevented from blocking and influencing the stamping process; when the oil brush 53 is not jacked up, the through hole 533 does not generate binding force on the sealing strip 443 and the conveying pipe 442, the conveying pipe 442 is in contact with the oil brush 53 at the moment, oil supply to the oil brush 53 is realized, when the oil brush 53 is jacked up, the second support rod 532 is driven to slide, when the second support rod 532 slides away from the oil tank 441, the tightening force of the through hole 533 on the conveying pipe 442 and the sealing strip 443 is increased, so that the conveying pipe 442 is clamped through the sealing strip 443, and waste caused by overflow of part of lubricating oil from the conveying pipe 442 when the conveying pipe 442 is not in contact with the oil brush 53 is avoided, so that the conveying pipe 442 can be correspondingly opened and closed according to the position of the oil brush 53, the effective utilization of the lubricating oil is further enhanced, the oil brush 53 is ensured to be timely supplemented with the lubricating oil in the use process, and the overall practicability and use effect of the mold are enhanced; when a workpiece is punched, a press machine applies pressure to the press column 43 to drive the press plate 2 to move towards the direction close to the bottom plate 3, the press plate 2 extrudes the piston rod 221 in the movement process, so that the piston rod 221 slides in the piston cylinder 22, the press block 24 contacts and extrudes the trapezoidal blocks 511 in the sliding process of the piston rod 221, the press block 24 completely pushes the trapezoidal blocks 511 out of the piston cylinder 22 along with the continuous sliding of the piston rod 221, at the moment, the press block 24 contacts with the inner side wall of the bottom end of the piston cylinder 22, the rubber bag 241 is pressurized, the connecting rod 245 is driven to slide on the inner side wall of the rubber bag 241 in the pressurized process of the rubber bag 241, thrust is generated on the second plate 244 in the sliding process of the connecting rod 245 to push the second plate 244 to slide out of the sliding groove 243, the second plate 244 continues to apply pressure to the trapezoidal blocks 511 in the sliding process, and accordingly the sliding range of the rack 51 is, the rotation angle of the gear 52 is further increased, so that the push rod 521 does not generate thrust on the first support rod 531 any more before the lower die 42 is contacted with the metal plate, the influence of the oil brush 53 on the stamping process is effectively avoided, and the operation effectiveness of the die is ensured; the gear 52 generates jacking force on the first supporting rod 531 through the push rod 521 in the rotating process, so that the oil brush 53 is jacked up, when the oil brush 53 is jacked up, the first pipe 535 and the second pipe 536 both move upwards, and in the process that the first pipe 535 moves upwards, the L-shaped rod 444 slides in the spiral groove, so that the first pipe 535 rotates in the second pipe 536 while moving upwards, the sponge 534 is driven to rotate, the surface of the sponge 534 can be in contact with the side wall of the lower die 42, lubricating oil on the surface of the sponge 534 is fully utilized, the side wall of the lower die 42 is fully lubricated, and the demolding difficulty of blanks is reduced; when a workpiece is punched, a press machine applies pressure to the press column 43 to drive the press plate 2 to move towards a direction close to the bottom plate 3, the press plate 2 extrudes the piston rod 221 in the movement process, so that the piston rod 221 slides in the piston cylinder 22, in the sliding process of the piston rod 221, the bottom end of the piston rod 221 extrudes the trapezoidal blocks 511, so that the trapezoidal blocks 511 generate thrust on the rack 51, when the rack 51 is forced to slide towards the direction close to the gear 52, the gear 52 is driven to rotate, the gear 52 generates top force on the first support rod 531 through the push rod 521 in the rotation process, in the contact process of the push rod 521 and the first support rod 531, the push rod 521 can collide with the first support rod 531, in order to avoid damage to the push rod 521 and the first support rod 531 caused by the collision, a cushion 537 is arranged on the side wall of the bottom end of the first support rod 531 through a spring, therefore, before the push rod 521 is contacted with the first support rod 531, the double buffering of the spring and the buffering cushion 537 is firstly carried out, so that the influence of inertia generated by the gear 52 in the rotating process on the push rod 521 and the first support rod 531 is effectively reduced, and the service life of the whole die is ensured; with the rotation of the gear 52, the push rod 521 generates thrust on the first support rod 531, and with the continuous rotation of the gear 52, the push rod 521 continuously slides on the surface of the first support rod 531 until the first support rod 531 no longer generates thrust on the push rod 521, the oil brush 53 is reset under the elastic force of the spring, the sponge 534 is retracted into the cavity 44 again, in order to reduce the sliding resistance of the side wall of the cavity 44 to the sponge 534 in the process of retracting the sponge 534 into the cavity 44, the sponge 534 is set to be frustum-shaped, the end of the sponge 534 close to the first tube 535 is small in size, and the end of the sponge 534 far away from the first tube 535 is large in size, so that the resistance received when the sponge 534 contracts is effectively reduced, and the damage of the sponge 534 caused by the sliding resistance in the contraction process is avoided.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A metal stamping die is characterized in that: comprises a top plate (1), a pressure plate (2), a bottom plate (3), a power unit (4) and a lubricating unit (5); the pressing plate (2) is arranged on the bottom plate (3) through a first air cylinder (21), and a piston cylinder (22) is arranged between the pressing plate (2) and the bottom plate (3); a piston rod (221) is connected in the piston cylinder (22) in a sliding manner; the top plate (1) is arranged on the pressure plate (2) through a second air cylinder (23); the power unit (4) comprises an upper die (41), a lower die (42) and a compression leg (43); the upper die (41) is arranged on the side wall of the bottom end of the pressure plate (2); the lower die (42) is arranged on the side wall of the top end of the bottom plate (3), the lower die (42) corresponds to the upper die (41), and a cavity (44) is formed in the lower die (42); the pressing column (43) is arranged on the side wall of the top end of the pressing plate (2), and the top end of the pressing column (43) penetrates through the top end of the top plate (1); the lubricating unit (5) comprises a rack (51), a gear (52) and an oil brush (53); the gear (52) is rotatably connected to the side wall of the cavity (44), and a wheel disc of the gear (52) is fixedly connected with a push rod (521); the rack (51) is connected in the cavity (44) in a sliding manner, the rack (51) is meshed with the gear (52), the tail end of the rack (51) penetrates into the piston cylinder (22), and a trapezoidal block (511) is mounted on the tail end of the rack (51); the oil brush (53) is connected in the cavity (44) in a sliding mode through a spring, the top end of the oil brush (53) penetrates through the surface of the lower die (42), and a first support rod (531) is arranged on the side wall, close to the gear (52), of the oil brush (53); the surface of the lower die (42) is covered with a layer of lubricating oil through the matching of the top plate (1), the pressing plate (2), the bottom plate (3), the power unit (4) and the lubricating unit (5), so that the demolding resistance is reduced.

2. The metal stamping die of claim 1, wherein: an oil tank (441) is arranged in the cavity (44) and is close to the oil brush (53); the oil tank (441) is provided with a material conveying pipe (442), and a plurality of sealing strips (443) are arranged at the end part of the oil tank (441) close to the material conveying pipe (442); the side wall of the oil brush (53) close to the oil tank (441) is provided with a second support rod (532), and the second support rod (532) is provided with a through hole (533), so that the sealing strip (443) and the material conveying pipe (442) are in sliding connection in the through hole (533); the lubricating oil in the oil brush (53) is supplemented in time through the matching of the oil tank (441), the material conveying pipe (442), the sealing strip (443) and the second support rod (532).

3. The metal stamping die of claim 1, wherein: a pressing block (24) is arranged at the bottom end of the piston rod (221); the pressing block (24) consists of a rubber bag (241) and a first plate (242); the first plate (242) is installed at the bottom end of the piston rod (221), a sliding groove (243) is formed in the side wall, close to the rack (51), of the first plate (242), and a second plate (244) is connected in the sliding groove (243) in a sliding mode; the rubber bag (241) is arranged at the bottom end of a first plate (242); the end part, far away from the rack (51), of the second plate (244) is hinged with a connecting rod (245), and the connecting rod (245) slides on the side wall of the rubber bag (241) through a roller; the sliding range of the rack (51) is increased through the matching of the piston rod (221), the pressing block (24), the second plate (244) and the connecting rod (245).

4. A metal stamping die according to claim 2, wherein: the oil brush (53) consists of a sponge (534), a first pipe (535) and a second pipe (536); the first tube (535) is connected in the second tube (536) in a sliding way, and the outer side wall of the first tube (535) is provided with a spiral groove; the cavity (44) is provided with an L-shaped rod (444) on the side wall close to the first tube (535), and the end part of the L-shaped rod (444) is embedded into the spiral groove in a sliding way; the sponge (534) is arranged on the side wall of the top end of the first tube (535); the lubricating oil on the oil brush (53) is fully utilized through the matching of the sponge (534), the first tube (535), the second tube (536) and the L-shaped rod (444).

5. The metal stamping die of claim 1, wherein: a buffer pad (537) is arranged on the side wall of the bottom end of the first supporting rod (531) through a spring, so that the buffer effect between the push rod (521) and the first supporting rod (531) is realized.

6. The metal stamping die of claim 4, wherein: the sponge (534) is frustum-shaped, the size of the end part of the sponge (534) close to the first pipe (535) is small, the size of the end part far away from the first pipe (535) is large, and resistance borne by the oil brush (53) during contraction is reduced.

7. A metal stamping process is characterized in that: the stamping process is suitable for the metal stamping die of any one of claims 1 to 6, and comprises the following steps: