CN112246975B - Automatic composite stamping production line - Google Patents

Abstract

The invention discloses a composite stamping automatic production line, which comprises a punch press, a numerical control automatic feeder, a composite stamping die, an automatic material receiving device and a workpiece material frame, wherein the punch press is arranged on the numerical control automatic feeder; the composite stamping die comprises an upper die and a lower die and is arranged on a stamping machine; the numerical control automatic feeder clamps the steel plate and feeds the steel plate into a composite stamping die for stamping; the automatic material receiving device is arranged on the side edge of the punch press and used for receiving the workpiece retreated from the upper die; the workpiece material frame is located beside the automatic material receiving device, and workpieces received by the material receiving hopper on the automatic material receiving device are thrown into the workpiece material frame. According to the automatic composite stamping production line, the punch, the numerical control automatic feeder and the automatic material receiving device are matched for use, automatic continuous stamping is realized, feeding and taking of stamping parts are automatically completed, the labor intensity is reduced, potential safety hazards are eliminated, the equipment efficiency is exerted to the maximum extent, automatic and systematic production of workpieces is realized, and the production efficiency is improved.

Description

Automatic composite stamping production line

Technical Field

The invention relates to the technical field of composite stamping, in particular to an automatic composite stamping production line for a flat washer.

Background

The flat washer is one of important parts of a matched bolt fastener, plays a role in helping a bolt and a workpiece to uniformly transmit pressure in use, and ensures that the contact area is increased and the stress is uniform. The workpiece requires a burr height of less than a certain value to avoid scratching operators or causing waste.

The flat gasket is processed mainly through equipment based on a composite stamping die, and the composite stamping die is a stamping die which can simultaneously complete two procedures of an inner hole and an outer shape on the same station of a stamping die. Is characterized in that: the production efficiency is improved by times, and the quality of the stamping part is improved. The workpiece formed in the die needs to be taken out so that the pressing can be continuously performed. The method of manual feeding and taking has potential safety hazard and low equipment efficiency, and various factors force the research and development of stamping automation equipment in the industry. Because the continuous stamping speed of the punch press is high, the feeding and receiving device is required to be stable and reliable.

Although similar automated production lines are disclosed:

utility model patent technology like publication number CN209867942U discloses a continuous punching production line of positive pole plate grid for solve among the prior art positive pole plate stamping process manual handling and cause workman intensity of labour big, inefficiency and the lower technical problem of quality. The method comprises the following steps: the uncoiler and the outlet are connected with the knurling machine, the knurling machine is provided with a feed inlet connected with a discharge outlet of the uncoiler, and the discharge outlet is connected with an inlet of the buffer storage rack; the inlet of the leveling feeder is connected with the outlet of the buffering storage rack, and the outlet of the leveling feeder is connected with the inlet of the punch; the inlet of the grid conveying line is connected with the outlet of the punch press, and the outlet of the grid conveying line is matched with the inlet of the stacking mechanism; the waste conveyor is arranged below the punch press, an inlet is connected with a waste outlet of the punch press, and a waste barrel is arranged at the outlet; the control system is respectively connected with the uncoiler, the knurling machine, the buffer storage rack, the leveling feeder, the punch, the grid conveying line, the waste conveyor and stacking mechanism connecting grid conveying line, the waste conveyor and the stacking mechanism; compared with the prior art, the invention reduces the labor input, improves the efficiency and improves the product quality.

The utility model discloses an automatic change punching press machine device is disclosed in the invention as utility model of bulletin number CN209502674U, concretely relates to stamping equipment field, including the workstation, four corners of the upper surface of workstation all are connected with the support column perpendicularly, the upper end of support column is provided with the roof, the upper surface of roof runs through slidable mounting has the pneumatic cylinder, and one side position department that the upper surface of roof is close to the pneumatic cylinder is provided with pneumatic cylinder control switch, the lower extreme horizontally connect of pneumatic cylinder has the connecting plate, the front surface of workstation is provided with the support. The base is driven to move by the first servo motor, so that the punch can punch different positions on the material, dust particles are generated on the surface of the material when the punch punches, the air can be compressed by the air compressor, the air enters the spray head, the air in the spray head is sprayed to the surface of the material, and the dust on the surface of the material can be blown off.

However, the disclosed scheme has the problems of complex structure, poor stability and easy interference with a punch press. Meanwhile, the design of the key composite stamping die and the material receiving device of the composite stamping equipment is lagged behind, and the design is as follows.

1. In the existing stamping die, an upper die comprises an upper die plate, a die shank, a material returning rod, an upper die base plate, an upper female die fixing plate, an upper punch and an upper punch fixing plate; the lower die comprises a lower die bottom plate, a lower die base plate, a lower die core, a lower die rubber sleeve and a lower die stripper plate. When the structure is used for stamping, the upper punch head is matched with the aperture of the lower die core, and the lower die core is matched with the aperture of the upper female die; the upper female die and the upper punch are matched with the lower die core along with the descending of the upper die to form the workpiece. According to the upper female die and the lower die core of the die, the gap between the upper punch and the lower die core is difficult to master when the upper die and the lower die are matched, so that the burrs of a stamping workpiece are high, the service life of the die is shortened, the material returning force is increased, and the material returning is difficult. And the lap cutting device is not arranged, the plate needs to be cut into long strips to be installed, otherwise, the interference with a press is generated, the automatic feeding cannot be realized, and the production efficiency is lower.

Although similar composite stamping dies are disclosed and do not have the same practical use.

The utility model discloses a just disclose a with compound stamping die, place the terrace die in the terrace die seat including cope match-plate pattern, the die shank and die, lower bolster, the terrace die seat that couple with the cope match-plate pattern in, a material stick passes the die shank and is associative with the kicking piece of die hole, and the cover has the rubber sleeve on the knockout bar of kicking piece top, the terrace die is equipped with the hole, is equipped with reset spring in the terrace die hole, and the lower extreme of a shaping piece slides and locates in the terrace die hole of reset spring top, and the head of shaping piece is located outside the terrace die, and the terrace die overcoat has the stripper, and the stripper is linked with the more than two bolts that slide and pass lower bolster and terrace die seat, all overlaps on the bolt between stripper and the terrace die seat has lower rubber sleeve, the hole of die is big-end-up step hole in lower extreme one side. The invention can realize one-time blanking and forming, and ensure that the section quality of the product meets the design requirement, thereby being directly used and improving the efficacy.

The scheme disclosed above has no mechanism for cutting off scrap edges, and the plate must be cut into small strips, so that the yield of raw materials is low. And above-mentioned publication scheme mostly uses the rubber sleeve as unloading and resetting means, and life is shorter, easily mechanical failure appears. Mostly manual small batch production is difficult to realize automated production.

2. The workpiece formed in the die needs to be taken out so that the punching can be continuously performed. The method of manually taking the workpiece has potential safety hazard and low equipment efficiency, and a plurality of factors force the industry to research and develop automatic stamping and material taking equipment.

And because the continuous stamping speed of the punch press is higher, the material receiving device is required to be stable and reliable, although a similar automatic material receiving device is disclosed, the practical use effect is not ideal.

The invention discloses a material receiving device for stamping discharging, which comprises a rack, wherein a material receiving box and a material receiving driving mechanism are arranged on the rack, a power output end of the material receiving driving mechanism is connected with a material receiving shovel, the material receiving driving mechanism drives the material receiving shovel to progress or retreat, the material receiving shovel stretches into a press during progress to receive materials and transfers the materials into the material receiving box during retreat, a first contact sensor is arranged at the center of the material receiving shovel, a second contact sensor is arranged on the material receiving box, the first contact sensor and the second contact sensor are electrically connected to a material receiving controller, and the material receiving controller controls and is connected with the material receiving driving mechanism. According to the stamping, discharging and receiving device disclosed by the patent technology, the receiving driving mechanism drives the receiving shovel to extend into the press to support and receive the formed stamping part and transfer the stamping part into the receiving box, so that the stamping part of the press can be fully automatically taken, the stamping efficiency of the press can be improved after the stamping device is used, the manual labor intensity is reduced, and potential safety hazards are avoided.

However, the disclosed scheme has the problems of complex structure, poor stability and easy interference with a punch press.

Therefore, a compound stamping automatic production line is urgently needed to realize automatic and systematic production of workpieces and improve production efficiency.

Disclosure of Invention

The invention provides a composite stamping automatic production line for solving the problems in the prior art.

In order to solve the technical problem, the invention adopts the following technical scheme:

a composite stamping automatic production line comprises a punch press, a numerical control automatic feeder, a composite stamping die, an automatic material receiving device and a workpiece material frame; the composite stamping die comprises an upper die and a lower die and is arranged on a stamping machine; clamping the steel plate by the numerical control automatic feeder, and feeding the steel plate between the composite stamping dies for stamping; the automatic material receiving device is arranged on the side edge of the punch press and is used for receiving the workpiece retreated from the upper die,

the automatic material receiving device comprises a support, a vertical rotating shaft and a rotating arm, wherein the support is fixedly arranged on a bed of the punch press, the vertical rotating shaft is arranged on the support, the rotating arm is connected with the vertical rotating shaft and moves around the vertical rotating shaft, the other end of the rotating arm is connected with a material receiving hopper through a connecting frame, the automatic material receiving device also comprises an inclined iron slide way arranged on a sliding block of the punch press, the inclined iron slide way is in contact fit with the rotating arm to provide power for the movement of the rotating arm, and meanwhile, the rotating arm is connected with a reset device;

the workpiece material frame is located beside the automatic material receiving device, and workpieces received by the material receiving hopper on the automatic material receiving device are thrown into the workpiece material frame.

The rotating arm is sleeved with a sliding roller.

And a long hole is arranged on the wedge slideway along the length direction, and the wedge slideway is fixed on the punch slide block through the long hole.

The resetting device is a tension spring which is connected with the rotating arm and the support.

The connecting frame comprises a vertical rod horizontal to the vertical rotating shaft and an extension rod connected with the vertical rod, and the receiving hopper is fixed at the other end of the extension rod.

The vertical rod is an adjusting bolt, a vertical threaded hole matched with the adjusting bolt is formed in the other end of the rotating arm, and the adjusting bolt is fixed in the vertical threaded hole in a threaded manner;

the lower end of the vertical rod is provided with a transverse threaded hole, the corresponding end part of the extension rod is provided with a threaded section, and the threaded section is fixed in the transverse threaded hole in a threaded manner.

The upper die comprises: the upper die plate, an upper female die for punching the outer edge of a workpiece, an upper punch for punching an inner hole of the workpiece, and an upper die base for fixing the upper female die, wherein the upper die base is fixed on the upper die plate, an upper die pressing plate for fixing the upper female die and the upper punch in cooperation with the upper die base, a die handle embedded into the upper die plate and provided with an inner hole, a knockout rod inserted into the die handle for material return, a material return base plate which slides between the upper die plate and the upper die base and is connected with the knockout rod, a material return sliding block which is positioned below the material return base plate and is used for withdrawing the workpiece from the upper die, and a material return pin which is used for transmitting material return force and slides in the upper die base, and two ends of the material return pin are respectively connected with the material return base plate and the material return sliding block;

the lower die comprises: the lower die comprises a lower die bottom plate, a lower die base plate and a lower die core for stamping a workpiece, wherein the lower die core is fixed on the lower die base plate through a lower die fixing plate and is provided with a stripper plate in a matching way; the discharging plate is positioned above the lower die fixing plate and connected with the lower die base plate through a guide column, and a discharging spring is arranged between the discharging plate and the lower die fixing plate;

the upper die further comprises: the upper die shearing cutter is used for cutting off scrap of the steel plate scrap, and is connected to the upper die plate through an upper die tool rest and a shearing cutter pressing plate;

the lower mould still includes: and the lower die material shearing cutter is fixed on the lower die bottom plate and forms shearing fit with the upper die material shearing cutter.

A step hole is formed in the upper female die to tightly press the step part of the upper punch so as to fix the upper punch; and a step hole is arranged at the upper die pressing plate to compress the step part of the upper female die so as to fix the upper female die.

The guide columns are respectively arranged at four corners of the stripper plate, the lower ends of the guide columns are pressed and positioned by the step holes of the lower die base plate, and the upper ends of the guide columns slide to penetrate through the stripper plate so as to realize sliding guide of the stripper plate;

a plurality of equal-height sleeves are fixed on the lower side of the lower die discharging plate through bolts extending downwards, the equal-height sleeves penetrate through the lower die base plate and extend into a slide way arranged on the lower die base plate, flange convex rings are arranged at the lower ends of the equal-height sleeves and are in sliding fit with the slide way on the lower die base plate, and the upper end faces of the flange convex rings are in abutting fit with the lower die fixing plate.

The scrap frame is positioned on one side of the punch press, punched workpiece inner hole material beans fall into the conveyor on the lower portion of the punch press from the lower die, the upper die shearing cutter and the lower die shearing cutter are matched to cut off and shape the steel plate scrap, and the scrap falls into the conveyor from the back of the punch press and is transported to the scrap frame together.

The invention has the beneficial effects that:

1. according to the compound stamping automatic production line, the punch, the numerical control automatic feeder, the compound stamping die and the automatic material receiving device are matched for use, so that automatic continuous stamping is realized, feeding and taking of stamping parts are automatically completed, the labor intensity is reduced, potential safety hazards are eliminated, the equipment efficiency is exerted to the greatest extent, automatic and systematic production of workpieces is realized, and the production efficiency is improved.

The numerical control automatic feeding device realizes ordered feeding of the steel plates and controls punching of the punch, and the numerical control automatic feeding device clamps the steel plates and sends the steel plates into the composite punching die for punching. The composite stamping die and the automatic material receiving device are arranged on the punch, and when the slide block of the punch moves to reach the top dead center, a workpiece stamped into the upper die of the composite die is retreated from the die by the material returning rod under the action of material returning force and falls into the automatic material receiving device. When the slide block moves to reach a bottom dead center, the automatic material receiving device rotates out of the side face of the punch press to throw out the workpiece and fall into the material frame. The punched material beans in the inner hole of the workpiece pass through a lower die bottom plate from a step hole of a lower die and fall into a lower conveyor of the punch press, the lower die shearing cutter and the upper die shearing cutter are matched to cut and shape the scrap material of the steel plate scrap, and the scrap material of the scrap material falls into the conveyor from the back and is conveyed to a scrap frame at the rear part of the punch press together.

The invention can realize blanking, punching, cutting and shaping at one time. The workpiece, the steel plate and the material beans punched by the workpiece are separated, the workpiece falls into the automatic material receiving device, and the material beans fall into a conveyor at the bottom of the punch press. The scrap material of the steel plate scrap is cut off and shaped by the cooperation of the upper die shearing cutter and the lower die shearing cutter, so that the automatic separation of the workpiece and the scrap material can be realized.

2. The driving force of the automatic material receiving device is provided by the punch press sliding block and the tension spring, the automatic material receiving device and the punch press sliding block synchronously move to avoid mechanical interference, and the structure is reliable. The stamping part taking and running can be automatically completed, the labor intensity is reduced, and potential safety hazards are avoided. The automatic continuous punching machine can be matched with a punching machine and a numerical control feeding machine for use, automatic continuous punching is realized, and the working efficiency of the equipment is exerted to the greatest extent.

When the punch press slide block returns to the top dead center of the punch press during operation, a workpiece stamped into the upper die of the composite die is ejected from the die by the knockout rod under the action of a material ejecting force and falls into the receiving hopper. When the sliding block of the punch press drives the inclined iron slideway to move downwards, the inclined iron slideway applies lateral force to the rotating arm to enable the rotating arm to rotate around the rotating shaft of the screw rod to move towards the side face. When the punch press slide block reaches a bottom dead center, the receiving hopper is rotated out of the side face of the punch press to throw out the workpiece and drop the workpiece into the workpiece material frame. When the sliding block of the punch press returns, the tension spring pulls the control rotating arm to rotate inwards along the inclined iron slideway to return to the material receiving position.

3. The automatic material receiving device is provided with the sliding roller which is matched with the rotating arm, so that the sliding roller and the rotating arm roll along the inclined iron slideway, and the rotating arm moves stably.

In the automatic material receiving device, the rotating arm, the connecting frame and each part of the material receiving hopper are in threaded connection and fastened by nuts, so that the angle of the corner of the rotating arm and the extension length of the material receiving hopper can be adjusted, and the material receiving position and the throwing-out position of the material receiving hopper meet the use requirements.

4. The composite stamping die can realize blanking, punching, cutting and shaping at one time, ensure the section quality of a product and meet the design requirement. Can be matched with a punch press and numerical control feeding equipment to realize automatic punching and continuous feeding, improve the production efficiency and reduce the labor intensity.

When the punching machine works, a steel plate blank is placed on a lower die stripper plate, a punch press sliding block drives a die shank and an upper die to move downwards, an upper female die and an upper punch relatively move with a lower die core, a workpiece is punched between the upper female die and the upper punch, and a workpiece inner hole material bean punched by the upper punch penetrates through a lower die base plate and a lower die bottom plate from a step hole of the lower die core and falls into a waste receiving device at the lower part of the punching machine; along with the upward movement of the return stroke of the punch press, the unloading spring applies force to the unloading plate to push the steel plate to separate from the lower die to realize unloading; when the punch returns to the top dead center, the workpiece punched between the upper female die and the upper punch is subjected to material returning force by the material returning rod, and is transferred to the punched workpiece through the material returning base plate, the material returning pin and the material returning sliding block, so that the workpiece is automatically withdrawn from the female die and falls into the material receiving device; meanwhile, the lower die shearing cutter and the upper die shearing cutter are matched to cut and shape the scrap of the steel plate scrap, and the scrap of the scrap falls into a scrap receiving device at the rear part of the punch press. The phenomenon that the overlap edge which is not cut touches the punch press due to the fact that the steel plate is too large is avoided, the width of the steel plate is limited, and the yield of the plate is improved.

5. In the composite punching die, the upper punch is fixed by pressing the step of the upper punch through the step hole of the upper female die, and the upper punch and the upper female die are matched, so that the position degree of the upper female die and the upper punch is ensured, and the use of a fixing plate is reduced. The base of punch design integrated into one piece processing, the area of contact increase with the upper die base reduces pressure, avoids causing the mould clearance increase or warp because of long-time the use, causes the mould to scrap.

The composite stamping die provided by the invention has the advantages that the upper concave die is pressed by the upper pressing plate, the upper pressing plate is matched with the upper die holder, and the position degree of the upper concave die and the upper punch is ensured. Because the upper female die and the upper punch of the stamping workpiece are quick-wear parts and need to be frequently disassembled, the use of the fixing plate and the positioning pin is reduced after the pressing plate is compressed, the whole upper die does not need to be disassembled from the punch, and the mounting operation is convenient.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic front view of the composite stamping die of the present invention;

FIG. 3 is a schematic side view of the composite stamping die of the present invention;

FIG. 4 is a schematic view of a guide post portion of the composite stamping die of the present invention;

FIG. 5 is a view of the automatic receiving device of the present invention in a use state when receiving materials;

fig. 6 is a view of the automatic material receiving device of the invention in a use state when throwing out a workpiece.

Detailed Description

The following detailed description of the embodiments of the invention refers to the accompanying drawings.

As shown in fig. 1, the composite punching automatic production line of the present invention includes a punch 1, a numerical control automatic feeder 3, a composite punching mold 2, an automatic material receiving device 4, a workpiece material frame 6, a conveyor 7, and a waste material frame 8.

The composite stamping die 2 comprises an upper die and a lower die, is arranged on the punch press 1, and provides stamping force for the die. The numerical control automatic feeder 3 clamps the steel plate 4 and feeds the steel plate into the composite stamping die 2 for stamping. The automatic material receiving device 4 is arranged on the side edge of the punch press 1 and used for receiving the workpiece retreated from the upper die and throwing the workpiece into the workpiece material frame 6 on the side surface along with the movement of the sliding block. The punched material beans in the inner hole of the workpiece fall into a lower conveyor 7 of the punch press from a lower die bottom plate, the upper die shearing cutter and the lower die shearing cutter in the composite stamping die are matched to cut off and shape the scrap of the steel plate scrap, the uncut scrap is prevented from touching the punch press, and the scrap of the scrap falls into the conveyor 7 from the back of the punch press and is transported into a scrap frame 8 at the rear part of the punch press together.

In the embodiment, the automatic feeding control is realized by connecting a signal of a cam controller on the punch 1 and the numerical control automatic feeding machine 3 to a computer, and the computer controls the stamping and feeding beats. When the sliding block leaves the bottom dead center, namely the die is separated from the steel plate, the numerical control automatic feeding machine controls the servo motor to drag the steel plate to move by a step pitch, and when the sliding block leaves the top dead center, the pressing stroke is started, the movement is finished, and the punching is waited. The numerical control feeder is controlled by servo motors in the X direction and the Y direction to move, and automatic feeding of the whole steel plate can be realized.

As shown in fig. 2 to 4, the composite press mold 2 includes an upper mold and a lower mold.

The upper die comprises: the stamping die comprises an upper die plate 13, an upper female die 110 for stamping the outer edge of a workpiece, an upper punch 17 for stamping an inner hole of the workpiece, an upper die base 14 for fixing the upper female die, an upper die pressing disc 19 for fixing the upper female die and the upper punch in cooperation with the upper die base, a die shank 12 embedded in the upper die plate and provided with an inner hole, a material returning rod 11 inserted into the die shank for returning the material, a material returning liner plate 15 sliding between the upper die plate and the upper die base and connected with the material returning rod, a material returning slide block 18 positioned below the material returning liner plate 15 and used for returning the workpiece from the upper die, a material returning pin 16 for transmitting material returning force and sliding in the upper die base, and two ends of the material returning pin 16 are respectively connected with the material returning liner plate 15 and the material returning slide block 18.

The upper die further comprises: an upper die shearing cutter 119 for cutting off scrap of steel plate scrap edges, wherein the upper die shearing cutter 119 is connected to the upper die plate 13 through an upper die tool rest 117 and a shearing cutter pressing plate 118.

The lower die comprises: the lower die comprises a lower die bottom plate 116, a lower die base plate 115 and a lower die core 113 for stamping a workpiece, wherein the lower die core 113 is fixed on the lower die base plate 115 through a lower die fixing plate 114 and is provided with a stripper plate 112 in a matching way with the lower die core 113; the stripper plate 112 is located above the lower die fixing plate 114 and is connected to the lower die pad 115 through guide posts, and a stripper spring 121 is provided between the stripper plate 112 and the lower die fixing plate 114. The discharge spring 121 is a nitrogen spring.

The lower mould still includes: and the lower die material shearing cutter 122 is fixed on the lower die bottom plate 116, and forms shearing fit with the upper die material shearing cutter 119.

In this embodiment, a stepped hole is formed at the upper die 110 to press the stepped portion of the upper punch 17, so as to fix the upper punch 17. Because the upper female die 110 and the upper punch 17 for punching the workpiece are quick-wear parts, the step of the upper punch is tightly pressed by the step hole of the upper female die to fix the upper punch, and the upper female die and the upper punch are matched with each other, so that the position degree of the upper female die and the upper punch is ensured, and the use of a fixing plate is reduced. The base of upper punch design integrated into one piece processing, the area of contact increase with the upper die base reduces pressure, avoids causing the mould clearance increase or warp because of long-time the use, causes the mould to scrap.

In this embodiment, the upper die pressing plate 19 is provided with a step hole for pressing the step portion of the upper die 110, so as to fix the upper die 110. The invention uses the upper pressure plate to compress the upper female die, and the upper pressure plate and the upper die holder are in a matching relationship, thereby ensuring the position degree of the upper female die and the upper punch. Because the upper die and the upper punch of the punching workpiece are quick-wear parts and need to be frequently disassembled, the use of a fixed plate and a positioning pin is reduced after the pressing plate is compressed, the whole upper die does not need to be detached from the punching machine, and the installation and the operation are convenient.

In this embodiment, the guide posts 30 are respectively disposed at four corners of the stripper plate 112, the lower ends of the guide posts 30 are pressed and positioned by the stepped holes of the lower die pad 115, and the upper ends of the guide posts slidably penetrate through the stripper plate 112, so as to slidably guide the stripper plate 112.

A plurality of equal-height sleeves 32 are fixed on the lower side of the lower die discharging plate 12 through bolts 31 extending downwards, the equal-height sleeves 32 penetrate through the lower die base plate 115 and extend into slide ways arranged on the lower die bottom plate 116, flange convex rings are arranged at the lower ends of the equal-height sleeves 32 and are in sliding fit with the slide ways on the lower die base plate 115, and the upper end surfaces of the flange convex rings are in abutting fit with the lower die fixing plate 114.

The lower die fixing plate 114 is fixed to the lower die backing plate 115 and the lower die base plate 116 in a limited manner by positioning pins and bolts.

In the embodiment, the discharging plate 112 is slidably guided through four guide columns, and four bolts and equal-height sleeves are used for penetrating through the lower die base plate, the lower die base plate and the lower die fixing plate to tighten the discharging plate, so that the discharging plate can stably move, and the rebound height of the discharging plate is limited.

In this embodiment, the heights of the cutting edges left by the upper female die 110, the upper punch 17 and the lower die core 113 are all high, and the upper female die, the upper punch 17 and the lower die core can be matched with the upper and lower die shearing cutters with different heights for quantitative grinding. Only the height of the sleeve with the same height as the lower die and the sealing height of the punch press needs to be correspondingly adjusted.

When the composite stamping die works, a steel plate blank is placed on the discharging plate 12 of the lower die, a punch press sliding block drives a die shank and an upper die to move downwards, the upper female die 110 and the upper punch 17 move relative to the lower die core 113, a workpiece is punched between the upper female die 110 and the upper punch 7, and a workpiece inner hole material bean punched by the upper punch 17 penetrates through a lower die base plate 115 and a lower die bottom plate 116 from a step hole of the lower die core 113 and falls into a waste receiving device at the lower part of the punch press; along with the upward movement of the return stroke of the punch press, the discharging spring 121 applies force to the discharging plate 112 to push the steel plate to separate from the lower die to realize discharging; when the punch press returns to the top dead center, the workpiece punched between the upper female die 110 and the upper punch 14 is subjected to material returning force by the material returning rod 11, and is transmitted to the punched workpiece through the material returning pad 1 plate 5, the material returning pin 16 and the material returning slide block 18, so that the workpiece is automatically withdrawn from the female die and falls into the material receiving device; meanwhile, the lower die shearing cutter 122 and the upper die shearing cutter 119 are matched to cut and shape the scrap of the steel plate scrap, and the scrap falls into a scrap receiving device at the rear part of the punch press. The phenomenon that the overlap edge which is not cut touches the punch press due to the fact that the steel plate is too large is avoided, the width of the steel plate is limited, and the yield of the plate is improved.

The composite stamping die can realize blanking, punching, cutting and shaping at one time, ensure the section quality of a product and meet the design requirement. Can be matched with a punch press and numerical control feeding equipment to realize automatic punching and continuous feeding, improve the production efficiency and reduce the labor intensity.

As shown in fig. 5 and fig. 6, the automatic material receiving device 4 includes a support 23 fixed on the bed 26 of the press, a vertical rotating shaft 22 installed on the support 23, and a rotating arm 25 connected with the vertical rotating shaft 22 and moving around the vertical rotating shaft, and the other end of the rotating arm 25 is connected with a material receiving hopper 211 through a connecting frame. The rotating arm 25 is sleeved with a sliding roller 27.

The punching machine further comprises an oblique iron slide way 28 arranged on the punch press slide block 21, the oblique iron slide way 28 is in contact fit with a sliding roller 27 on the rotating arm 25 to provide power for the movement of the rotating arm 25, and meanwhile, a tension spring 24 is connected between the rotating arm 25 and the support to provide power for the resetting of the rotating arm 25.

In this embodiment, the vertical rotating shaft 22 is a screw rotating shaft, and the screw rotating shaft mounted on the bracket is fixed to the bracket 23 by threads. The corresponding end part of the rotating arm 25 is rotatably sleeved on the screw rotating shaft, and the screw rotating shaft is in clearance fit with the rotating arm 5 and can be lubricated by grease, so that the stability of the movement mechanism is enhanced.

In this embodiment, the sliding roller 27 cooperates with the rotating arm 25 to make the sliding roller 27 roll along the ramp 28, so that the rotating arm 25 moves smoothly.

This embodiment utilizes a T-shaped slot in the bottom of the punch slide 21 to hold the wedge slide 28. Meanwhile, long holes are arranged on the wedge slideway 28 along the length direction, and the wedge slideway 28 is fixed on the punch press slide block 21 through the long holes, so that the position of the wedge slideway can be adjusted by using the long holes on the cross plate of the wedge slideway, and the position angle of the rotating arm can be adjusted.

In this embodiment, the connecting frame comprises a vertical rod horizontal to the vertical rotating shaft and an extension rod connected with the vertical rod, and the material receiving hopper 211 is fixed at the other end of the extension rod. The vertical rod is an adjusting bolt 29, the other end of the rotating arm 25 is provided with a vertical threaded hole matched with the adjusting bolt 29, and the adjusting bolt 29 is fixed in the vertical threaded hole in a threaded manner. Meanwhile, the lower end of the vertical rod is provided with a transverse threaded hole, the corresponding end part of the extension rod is provided with a threaded section, and the threaded section is fixed in the transverse threaded hole in a threaded manner.

In the invention, the rotating arm, the connecting frame and each part of the receiving hopper are connected by screw threads and fastened by nuts, so that the angle of the corner of the rotating arm 25 and the extension length of the receiving hopper 211 can be adjusted, and the receiving position and the throwing-out position of the receiving hopper meet the use requirements.

When the invention works, a steel plate blank is placed on the upper surface of the lower die, and the numerical control feeding equipment is used for controlling step feeding. When the punch press slide 21 returns to the top dead center of the punch press, as shown in fig. 4, the workpiece punched into the upper die of the compound die is ejected from the die by the knockout pin with a material ejection force and falls into the receiving hopper 211. When the ram slide 1 drives the wedge slide 28 to move downward, the wedge slide 28 applies a lateral force to the rotating arm 25, so that the rotating arm rotates around the screw shaft to the side face. When the punch press slide 21 reaches the bottom dead center, as shown in fig. 2, the receiving hopper 11 is rotated out of the side of the punch press to throw the work out and drop it into the material frame. When the punch press slide block 21 returns, the tension spring 24 pulls the rotating arm 25 to rotate inwards to return to the material receiving position along the inclined iron slide way 28, and a working cycle is completed.

The driving force of the automatic material receiving device is provided by the punch press slide block 21 and the tension spring 24, the automatic material receiving device and the punch press slide block 21 move synchronously to avoid mechanical interference, and the structure is reliable. Can accomplish getting of stamping workpiece and operation automatically, reduce intensity of labour, stop the potential safety hazard. The automatic continuous punching machine can be matched with a punching machine and a numerical control feeding machine for use, automatic continuous punching is realized, and the working efficiency of the equipment is exerted to the greatest extent.

When the composite stamping automatic production line works, the numerical control automatic feeder 3 realizes ordered feeding of the steel plate 4 and stamping of the punch press, the steel plate 4 is conveyed to the position between the upper die and the lower die of the composite stamping die 2, the punch press 1 drives the die to complete a stamping stroke, and when the slide block is at the upper dead point, the workpiece is withdrawn from the upper die and falls into the automatic material receiving device. When the slide block is at the bottom dead center, the workpiece is thrown out of the material receiving hopper and falls into the workpiece material frame.

According to the automatic composite stamping production line, the punch, the numerical control automatic feeder, the composite stamping die and the automatic material receiving device are matched for use, automatic continuous stamping is realized, feeding and taking of stamping parts are automatically completed, the labor intensity is reduced, potential safety hazards are eliminated, the equipment efficiency is exerted to the maximum extent, automatic and systematic production of workpieces is realized, and the production efficiency is improved.

The invention can realize blanking, punching, cutting and shaping at one time. The workpiece, the steel plate and the material beans punched by the workpiece are separated, the workpiece falls into the automatic material receiving device, and the material beans fall into a conveyor at the bottom of the punch press. The scrap material of the steel plate scrap is cut off and shaped by the cooperation of the upper die shearing cutter and the lower die shearing cutter, so that the automatic separation of the workpiece and the scrap material can be realized.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention.

Claims (4)

1. A composite stamping automatic production line comprises a punch press, a numerical control automatic feeder, a composite stamping die, an automatic material receiving device and a workpiece material frame; the composite stamping die comprises an upper die and a lower die and is arranged on a stamping machine; the numerical control automatic feeder clamps the steel plate and feeds the steel plate into a composite stamping die for stamping; automatic receiving device installs at the punch press side for catch the work piece that withdraws from last mould, its characterized in that:

the upper die comprises: the upper die plate, an upper female die for punching the outer edge of a workpiece, an upper punch for punching an inner hole of the workpiece, and an upper die base for fixing the upper female die, wherein the upper die base is fixed on the upper die plate, an upper die pressing plate for fixing the upper female die and the upper punch in cooperation with the upper die base, a die handle embedded into the upper die plate and provided with an inner hole, a knockout rod inserted into the die handle for material return, a material return base plate which slides between the upper die plate and the upper die base and is connected with the knockout rod, a material return sliding block which is positioned below the material return base plate and is used for withdrawing the workpiece from the upper die, and a material return pin which is used for transmitting material return force and slides in the upper die base, and two ends of the material return pin are respectively connected with the material return base plate and the material return sliding block;

the lower die comprises: the lower die comprises a lower die bottom plate, a lower die base plate and a lower die core for stamping a workpiece, wherein the lower die core is fixed on the lower die base plate through a lower die fixing plate and is provided with a stripper plate in a matching way; the discharging plate is positioned above the lower die fixing plate and is connected with the lower die base plate through a guide column, and a discharging spring is arranged between the discharging plate and the lower die fixing plate;

the upper die further comprises: the upper die shearing cutter is used for cutting off scrap of the steel plate scrap, and is connected to the upper die plate through an upper die tool rest and a shearing cutter pressing plate;

the lower mould still includes: the lower die material shearing cutter is fixed on the lower die bottom plate and forms shearing fit with the upper die material shearing cutter;

a stepped hole is formed in the upper female die and used for pressing a stepped part of the upper punch so as to fix the upper punch; a step hole is formed in the upper die pressing plate to tightly press the step part of the upper female die so as to fix the upper female die;

the automatic material receiving device comprises a support, a vertical rotating shaft and a rotating arm, wherein the support is fixedly arranged on a bed of the punch press, the vertical rotating shaft is arranged on the support, the rotating arm is connected with the vertical rotating shaft and moves around the vertical rotating shaft, the other end of the rotating arm is connected with a material receiving hopper through a connecting frame, the automatic material receiving device also comprises an inclined iron slide way arranged on a sliding block of the punch press, the inclined iron slide way is in contact fit with the rotating arm to provide power for the movement of the rotating arm, and meanwhile, the rotating arm is connected with a reset device;

the inclined iron slide way is provided with a long hole along the length direction and is fixed on the punch press slide block through the long hole;

the connecting frame comprises a vertical rod horizontal to the vertical rotating shaft and an extension rod connected with the vertical rod, and the material receiving hopper is fixed at the other end of the extension rod;

the vertical rod is an adjusting bolt, a vertical threaded hole matched with the adjusting bolt is formed in the other end of the rotating arm, and the adjusting bolt is fixed in the vertical threaded hole in a threaded manner;

the lower end of the vertical rod is provided with a transverse threaded hole, the corresponding end part of the extension rod is provided with a threaded section, and the threaded section is fixed in the transverse threaded hole in a threaded manner;

the workpiece material frame is positioned beside the automatic material receiving device, and workpieces received by a material receiving hopper on the automatic material receiving device are thrown into the workpiece material frame;

the punching machine also comprises a conveyor and a waste material frame, wherein the waste material frame is positioned on one side of the punching machine, punched workpiece inner hole material beans fall into the conveyor at the lower part of the punching machine from a lower die, an upper die material shearing cutter and a lower die material shearing cutter are matched to cut and shape steel plate scrap material, the scrap material falls into the conveyor from the back of the punching machine, and is conveyed to the waste material frame together;

the automatic feeding control is that the signal of the cam controller on the punching machine and the numerical control automatic feeding machine are connected to a computer, and the beat of punching and feeding is controlled by the computer; when the sliding block leaves the bottom dead center, namely the die is separated from the steel plate, the numerical control automatic feeding machine controls the servo motor to drag the steel plate to move by a step pitch, and when the sliding block leaves the top dead center, the pressing stroke is started, the movement is finished, and the punching is waited.

2. The automatic production line of composite stamping according to claim 1, characterized in that: the rotating arm is sleeved with a sliding roller.

3. The automatic production line of composite stamping according to claim 1, characterized in that: the resetting device is a tension spring which is connected with the rotating arm and the support.

4. The automatic production line of composite stamping according to claim 1, characterized in that: the guide columns are respectively arranged at four corners of the stripper plate, the lower ends of the guide columns are pressed and positioned by the step holes of the lower die base plate, and the upper ends of the guide columns slide to penetrate through the stripper plate, so that the stripper plate is guided in a sliding manner;

a plurality of equal-height sleeves are fixed on the lower side of the lower die discharging plate through bolts extending downwards, the equal-height sleeves penetrate through the lower die base plate and extend into a slide way arranged on the lower die base plate, flange convex rings are arranged at the lower ends of the equal-height sleeves and are in sliding fit with the slide way on the lower die base plate, and the upper end faces of the flange convex rings are in abutting fit with the lower die fixing plate.

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