Same-station blanking, stretching, punching and hole flanging composite forming die

Abstract

The utility model relates to a same-station blanking, stretching, punching and hole flanging composite forming die which comprises an upper die and a lower die, the upper die comprises a discharging plate, a blanking stretching male, an upper material returning block and a secondary punch, the blanking stretching male is connected with the discharging plate in a sliding mode, the upper material returning block is connected with the blanking stretching male in a sliding mode, and the secondary punch is connected with the upper material returning block in a sliding mode. The lower die comprises a female die plate, a limiting rod, an outer stripping block, a male stretching part, a cutter and an inner supporting block, the limiting rod can abut against the upper die, the cutter is in sliding connection with the male stretching part, the cutter and the limiting rod both abut against the inner supporting block, the inner supporting block can slide up and down, the male stretching part is sleeved with the outer stripping block, and the outer stripping block can be located in an inner cavity of the female die plate. According to the die in the scheme, stretching, punching and hole flanging can be conducted on a product, the die does not need to be replaced in the punch forming process of the product, the production efficiency of the product can be improved, time waste caused when the die is replaced is avoided, the width of a material belt does not need to be increased in the punching process, and the production cost of the product cannot be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a same-station blanking, stretching, punching and flanging composite forming die. Background Art

[0002] Hardware products with hole-turning technology have strict requirements during production, such as no cracking of the hole-turning flange, no front edge on the hole-turning end face, and standard hole-turning height. Conventional hole-turning technology requires a pre-punching process first, and then a second hole-turning process. Therefore, a single punching die or a continuous die in a stamping die is often used to realize the punching and hole-turning processes. When a single punching die is used for production, two different sets of dies are required for punching and hole-turning. The entire operation process is troublesome to transfer and the production efficiency is low. When a continuous die is used for production, punching and hole-turning require two different steps for punching. Different workstations need to be set up in the mold. Combined with the product forming process with tensile properties, such products often need to add a delivery overlap to the stamping strip. The width of the entire strip is larger than that of the single punching operation strip, which indirectly reduces the material utilization rate and increases the production cost.

[0003] When the hardware products on the gas mask are produced, four working steps including blanking, stretching, punching and flanging are required. When the single punch die in the prior art is used to produce the hardware products, the production efficiency is low; when the continuous die in the prior art is used to produce the hardware, the utilization rate of the material will be reduced and the production cost of the product will be increased. Utility Model Content

[0004] The utility model provides a composite forming die for blanking, stretching, punching and punching in the same working position to solve the problem of low production efficiency or increased product production cost when producing hardware products for gas masks in the above-mentioned prior art solutions. The forming die in this solution can reduce product production cost and increase product production efficiency.

[0005] The technical scheme adopted by the utility model is: a composite forming die for blanking, stretching, punching and flipping at the same working position, comprising an upper die and a lower die, the upper die comprising a stripping plate, a blanking and stretching male, an upper stripping block and a secondary punch, the blanking and stretching male is slidably connected to the stripping plate, the upper stripping block is located in the inner cavity of the blanking and stretching male and is slidably connected to the blanking and stretching male, the bottom surface of the upper stripping block is arc-shaped, the secondary punch passes through the upper stripping block and is slidably connected to the upper stripping block, the lower die comprises a concave template, a limiting rod, an outer stripping block, a stretching male, a cutting knife, and an inner supporting block, the limiting rod can abut against the upper die, the cutting knife is located in the inner cavity of the stretching male and is slidably connected to the stretching male, the cutting knife and the limiting rod are both located on the inner supporting block and abut against the inner supporting block, the inner supporting block can slide up and down, the outer stripping block is sleeved on the stretching male and is slidably connected to the stretching male, the outer stripping block can be located in the inner cavity of the concave template and the top surface of the outer stripping block can be flush with the top surface of the concave template, and the top surface of the stretching male can fit with the arc-shaped bottom surface of the upper stripping block. The inner cavity side wall of the outer stripping block is fitted with the side wall of the stretching male.

[0006] When the material strip on the concave plate is pulled forward to the punching position by the traction of the traction part, the upper die moves downward until the upper die and the lower die are closed. At this time, the stripper plate and the concave plate are in contact, and the material strip is located between the blanking stretching male and the outer stripping block. After the stripper plate and the concave plate are in contact, the upper die except the stripper plate continues to move downward. The blanking stretching male moving downward eats into the concave plate to shear the material strip. After the sheared round piece is separated from the material strip, it is stretched and formed by the blanking stretching male and the upper stripping block that continue to move downward.

[0007] The blanking stretching pin moving downward stretches the edge of the round sheet. When the blanking stretching pin moves downward, it will be mounted on the stretching pin and press the outer stripping block downward, so that the outer stripping block and the blanking stretching pin move downward synchronously. The blanking stretching pin moves downward to squeeze the edge of the round sheet between the blanking stretching pin and the stretching pin to form the side of the product. After the side of the product is formed, the blanking stretching pin no longer moves downward.

[0008] The downward moving upper material stripping block squeezes the round piece onto the stretching rod until the two sides of the round piece fit with the arc-shaped surfaces of the upper material stripping block and the stretching rod respectively. At this time, the center part of the round piece is stretched into an arc to form the top surface of the product. When the top surface of the product is formed, the upper material stripping block is supported by the stretching rod and no longer moves downward.

[0009] The downward movement of the secondary punch is divided into two stages. In the first stage, the secondary punch continues to move downward after abutting the round sheet, forming a punch hole on the round sheet. At the same time, the bottom of the secondary punch extends into the cutter cavity until the limit rod abuts against the upper die. At this time, the first stage of the movement of the secondary punch ends. After the second stage begins, the secondary punch continues to move downward. At this time, the upper die presses the limit rod downward, so that the limit rod and the secondary punch move downward synchronously. The downward movement of the limit rod drives the inner support block and the cutter on the inner support block to move downward synchronously with the secondary punch until the secondary punch drives the punching edge of the round sheet into the inner cavity of the stretching male to complete the hole flipping of the product.

[0010] When the side forming work of the product is completed, the forming work of the top surface of the product and the punching and flipping work of the product are also completed, and the formed product is located on the stretching pin. Then the mold is opened, the upper mold moves upward, the unloading plate, the blanking stretching pin, the upper material removal block and the secondary punch are separated from the lower mold, and the outer stripping block and the limit rod are no longer subjected to downward pressure. The limit rod that loses the downward pressure will move upward synchronously with the inner support block and the cutter until it is reset. The outer stripping block that loses the downward pressure will move upward until it is reset, and the upward moving outer stripping block will eject the product on the stretching pin from the lower mold. After being ejected, the product passes through the shear hole left by the shearing on the material strip. At this time, the material strip continues to move forward, bringing the product in the shear hole out of the mold, and then moves the material strip back to the stamping position to prepare for the next stamping of the product.

[0011] The mold in this solution can achieve stretching, punching and hole turning of the product. There is no need to change the mold during the stamping process of the product, which can improve the production efficiency of the product and avoid wasting time when changing the mold. There is no need to increase the width of the material strip during stamping, which will not increase the production cost of the product. In addition, the cutter of the mold in this solution can float in the lower mold. When the punched hole formed on the product is turned, the cutter can move down to leave a hole turning space for the punch to avoid collision between the punch and the cutter when turning the hole.

[0012] Preferably, the upper die also includes an upper die seat, an upper pad, an upper fixed plate and a fixed plate which are fixedly connected in sequence, the blanking and stretching male is fixedly connected to the fixed plate, the top surface of the upper stripping block can abut against the upper fixed plate, the upper die seat is provided with an inner stripping elastic member and a discharge elastic member, one end of the discharge elastic member is fixedly connected to the upper die seat, and the other end passes through the upper pad, the upper fixed plate and the fixed plate and is fixedly connected to the discharge plate; one end of the inner stripping elastic member is fixedly connected to the upper die seat, and the other end passes through the upper pad and the upper fixed plate and extends into the inner cavity of the blanking and stretching male and is fixedly connected to the upper stripping block, and the secondary punch is fixedly connected to the upper fixed plate. Both the inner stripping elastic member and the discharge elastic member can be compression springs. The upper die seat is connected to a driving part, and the driving part drives the upper die seat to move downward to drive the upper die to move downward, that is, the downward movement of the upper die seat drives the discharge plate, the blanking and stretching male, the upper stripping block and the secondary punch to move downward synchronously.

[0013] The upper fixed plate is provided with a stepped hole whose upper aperture is larger than the lower aperture. When the top of the secondary punch is located in the stepped hole, the side of the secondary punch fits with the inner cavity side wall of the stepped hole, preventing the secondary punch from moving downward in the upper fixed plate. After the upper fixed plate is fixedly connected to the upper pad plate, the upper pad plate abuts against the top surface of the secondary punch, preventing the secondary punch from moving upward in the upper fixed plate, thereby completing the fixed connection between the secondary punch and the upper fixed plate. Similarly, the fixed plate is provided with a stepped hole for preventing the blanking stretching pin from moving downward in the fixed plate. The side of the blanking stretching pin fits with the inner cavity side wall of the stepped hole. After the upper fixed plate is fixedly connected to the fixed plate, the upper fixed plate abuts against the top surface of the blanking stretching pin, thereby completing the fixed connection between the blanking stretching pin and the fixed plate.

[0014] The upper die seat is connected to the unloading plate through the unloading elastic member. When the upper die seat drives the unloading plate to move downward, the unloading plate first contacts the concave plate of the lower die, and then the upper die seat continues to move downward. At this time, the unloading elastic member is compressed, and the unloading plate and the concave plate remain relatively still. When the upper unloading block is supported by the stretching male, the upper die seat continues to move downward, and the inner unloading elastic member is compressed, and the upper unloading block and the stretching male remain relatively still. When the upper die moves upward to reset, the unloading elastic member restores its deformation to drive the unloading plate to reset, and the inner unloading elastic member restores its deformation to drive the upper unloading block to reset.

[0015] Preferably, the lower die also includes a lower lining plate, a lower fixed plate, a lower pad and a lower die seat which are fixedly connected in sequence, the concave die plate is located on the lower lining plate and fixedly connected to the lower lining plate, the inner support block is located in the inner cavity of the lower pad and is slidably connected to the lower pad, the lower die seat is provided with a reset elastic member abutting against the bottom surface of the inner support block, the top of the stretching male passes through the lower fixed plate and the lower lining plate and is located in the inner cavity of the concave die plate, the top of the limit rod passes through the lower fixed plate, the lower lining plate and the concave die plate, the top of the limit rod can also pass through the unloading plate and abut against the fixed plate, the bottom surface of the outer stripping block is also provided with a push rod, and the end of the push rod away from the outer stripping block is provided with a push portion for pushing the outer stripping block to reset. The reset elastic member can be a nitrogen spring. When the limit rod is pressed down by the upper die to drive the inner support block to move downward, the inner support block moves downward in the inner cavity of the lower pad, and the inner support block moves downward to squeeze the reset elastic member. When the stretching male is pressed down by the blanking stretching male, the stretching male moving downward will drive the push rod to move downward. When the upper die moves upward to reset, the reset elastic member recovers its deformation and drives the inner support block to move upward. When the inner support block moves upward until the top surface of the inner support block abuts against the bottom surface of the lower fixed plate, the inner support block drives the cutter and the limit rod to reset. When the upper die moves upward to reset, the push part pushes the ejector rod to reset, and the ejector rod reset drives the outer stripping block to reset.

[0016] Preferably, the push part includes a lower support plate, a push elastic member and a connecting plate which are fixedly connected in sequence. The connecting plate is also fixedly connected to the lower die base. The bottom of the push rod passes through the lower lining plate, the lower fixed plate, the inner support block and the lower die base and is fixedly connected to the lower support plate. When the top surface of the outer stripping block is flush with the top surface of the concave template, the top surface of the lower support plate abuts against the bottom surface of the lower die base. The push elastic member can be a nitrogen spring. When the push rod is forced to move downward, the push rod pushes the lower support plate to move downward, and the downward movement of the lower support plate will squeeze the push elastic member. When the push rod loses the downward pressure, the push elastic member restores its deformation, driving the lower support plate and the push rod to move upward until the top surface of the lower support plate abuts against the bottom surface of the lower die base. At this time, the lower support plate cannot continue to move upward, the lower support plate is reset, and the push rod connected to the lower support plate is reset. The elastic member is used as the power source of the push part, and no additional power is required when the mold is working.

[0017] Preferably, a guide post is provided on the unloading plate, a guide sleeve hole is provided on the concave mold plate, and a chamfer is provided on the bottom surface of the guide post. The guide post can be inserted into the guide sleeve hole. When the guide post is inserted into the guide sleeve hole, the side surface of the guide post fits with the side surface of the inner cavity of the guide sleeve hole. After the guide post and the guide sleeve hole are provided, when the mold is closed, the guide post and the guide sleeve hole are matched first. The guide post can guide the upper mold moving downward to avoid offset between the upper mold and the lower mold when the mold is closed. The setting of the chamfer on the guide post makes it easier for the guide post to extend into the guide sleeve hole.

[0018] Preferably, a limiting protrusion is provided on the upper stripping block, and a limiting groove is provided in the inner cavity of the blanking stretching male, and the limiting protrusion is located in the limiting groove. The setting of the limiting groove and the limiting protrusion can limit the movement range of the upper stripping block in the blanking stretching male, avoiding unsatisfactory stretching effect when stretching the top surface of the product.

[0019] Preferably, a first protrusion is provided on the concave template, and a second protrusion is provided on the outer stripping block. When the outer stripping block slides on the stretching pin, the first protrusion can abut against the second protrusion to limit the maximum sliding position of the outer stripping block. The arrangement of the first protrusion and the second protrusion can prevent the outer stripping block from moving upward too far, causing the top surface of the outer stripping block to be higher than the top surface of the concave template, thereby affecting the stamping effect of the product.

[0020] Preferably, the upper die base is also provided with a screw plug for facilitating the disassembly and assembly of the inner retraction elastic member and the unloading elastic member, and the screw plug is detachably connected to the upper die base. After the screw plug is provided, it is more convenient to disassemble and assemble the elastic member installed on the upper die base. Each elastic member has a screw plug corresponding to it. When the elastic member needs to be disassembled and assembled, it is only necessary to remove the screw plug corresponding to the elastic member from the upper die base.

[0021] Preferably, the concave mold plate is provided with a floating pin for lifting the material strip for feeding, and the floating pin is provided with a slot for engaging the material strip, and there are a plurality of floating pins, which are symmetrically arranged to engage the two sides of the material strip. The floating pin can lift the material strip, and when the material strip is fed, friction between the bottom surface of the material strip and the concave mold plate is avoided, thereby preventing scratches on the material strip.

[0022] Preferably, a feeding trough for accommodating the material strip is provided on the top surface of the concave plate at one end away from the floating pin, and the bottom surface of the feeding trough is an inclined plane, and the end of the inclined plane away from the floating pin is inclined toward the bottom surface of the concave plate. When the material strip moves forward with the stamped product, the product will tilt when passing through the feeding trough, and then fall off the mold. The provision of the feeding trough can accelerate the product to leave the mold.

[0023] Compared with the prior art, the utility model has the following beneficial effects: the mold in the present solution can realize stretching, punching and hole turning of the product, and there is no need to replace the mold during the stamping process of the product, which can improve the production efficiency of the product and avoid wasting time when replacing the mold. In addition, there is no need to increase the width of the material strip during stamping, which will not increase the production cost of the product. In addition, the cutter of the mold in the present solution can float in the lower mold, and the cutter can move down when the punched hole formed on the product is turned, leaving a hole turning space for the punch to avoid collision between the punch and the cutter when turning the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a composite forming die for blanking, stretching, punching and hole-flanging at the same working position of the utility model;

[0025] Figure 2 It is a cross-sectional view of a composite forming die for blanking, stretching, punching and hole-flanging at the same working position of the utility model;

[0026] Figure 3 The utility model is a composite forming die for blanking, stretching, punching and hole-turning at the same working position. Figure 2 A magnified view of part A;

[0027] Figure 4 The utility model is a composite forming die for blanking, stretching, punching and hole-turning at the same working position. Figure 2 A magnified view of part B;

[0028] Figure 5 It is a cross-sectional view of the working state of a same-station blanking, stretching, punching and flanging composite forming die of the utility model when the die is closed;

[0029] Figure 6 It is a cross-sectional view of the working state of a same-station blanking, stretching, punching and flipping composite forming die of the utility model during punching;

[0030] Figure 7The utility model is a cross-sectional view of the working state of a same-station blanking, stretching, punching and flanging composite forming die during flanging. DETAILED DESCRIPTION

[0031] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1

[0035] like Figure 1-Figure 2 The figure shows an embodiment 1 of a same-station blanking, stretching, punching and flanging composite forming die, comprising an upper die and a lower die, the upper die comprising a stripper plate 1, a blanking and stretching male 2, an upper stripper block 3 and a secondary punch 4, the blanking and stretching male 2 is slidably connected to the stripper plate 1, the upper stripper block 3 is located in the inner cavity of the blanking and stretching male 2 and is slidably connected to the blanking and stretching male 2, the bottom surface of the upper stripper block 3 is arc-shaped, the secondary punch 4 passes through the upper stripper block 3 and is slidably connected to the upper stripper block 3, the lower die comprises a concave template 5, a limiting rod 6, an outer stripper block 7, The stretching male 8, the cutter 9, the inner support block 10, the limit rod 6 can be in contact with the upper die, the cutter 9 is located in the inner cavity of the stretching male 8 and is slidably connected to the stretching male 8, the cutter 9 and the limit rod 6 are both located on the inner support block 10 and are in contact with the inner support block 10, the inner support block 10 can slide up and down, the outer stripping block 7 is sleeved on the stretching male 8 and is slidably connected to the stretching male 8, the outer stripping block 7 can be located in the inner cavity of the concave template 5 and the top surface of the outer stripping block 7 can be flush with the top surface of the concave template 5, and the top surface of the stretching male 8 can fit with the arc bottom surface of the upper stripping block 3. The inner cavity side wall of the outer stripping block 7 fits with the side wall of the stretching male 8.

[0036] The working principle or working process of this embodiment is as follows: when the material strip 35 on the concave plate 5 advances to the punching position under the traction of the traction part, the upper die moves downward until the upper die and the lower die are closed, at which time the stripper plate 1 abuts against the concave plate 5, and the material strip 35 is located between the blanking stretching male 2 and the outer stripping block 7. After the stripper plate 1 abuts against the concave plate 5, the upper die except the stripper plate 1 continues to move downward. The blanking stretching male 2 moving downward eats into the concave plate 5 and shears the material strip 35. After the sheared round piece is separated from the material strip 35, it is stretched and formed by the blanking stretching male 2 and the upper stripping block 3 that continue to move downward.

[0037] The blanking stretching male 2 moving downward stretches the edge of the round sheet. When the blanking stretching male 2 moves downward, it will be mounted on the stretching male 8 and press the outer stripping block 7 downward, so that the outer stripping block 7 moves downward synchronously with the blanking stretching male 2. The blanking stretching male 2 moves downward to squeeze the edge of the round sheet between the blanking stretching male 2 and the stretching male 8 to form the side of the product 36. After the side of the product 36 is formed, the blanking stretching male 2 no longer moves downward.

[0038] The upper material stripping block 3 moving downward squeezes the round piece onto the stretching male 8 until the two sides of the round piece fit with the arcuate surfaces of the upper material stripping block 3 and the stretching male 8 respectively. At this time, the central part of the round piece is stretched into an arc to form the top surface of the product 36. When the top surface of the product 36 is formed, the upper material stripping block 3 is supported by the stretching male 8 and the upper material stripping block 3 no longer moves downward.

[0039] The downward movement process of the secondary punch 4 is divided into two stages. In the first stage, the secondary punch 4 continues to move downward after abutting the round sheet, forming a punch hole on the round sheet. At the same time, the bottom of the secondary punch 4 extends into the inner cavity of the cutter 9 until the limit rod 6 abuts against the upper die. At this time, the first stage movement process of the secondary punch 4 ends. After the second stage begins, the secondary punch 4 continues to move downward. At this time, the upper die presses the limit rod 6 downward, so that the limit rod 6 and the secondary punch 4 move downward synchronously. The limit rod 6 moves downward to drive the inner support block 10 and the cutter 9 on the inner support block 10 to move downward synchronously with the secondary punch 4 until the secondary punch 4 drives the punching edge of the round sheet into the inner cavity of the stretching male 8, completing the hole flipping of the product 36.

[0040] When the side forming work of the product 36 is completed, the forming work of the top surface of the product 36 and the punching and turning work of the product 36 are completed, and the formed product 36 is located on the stretching male 8. Then the mold is opened, the upper mold moves upward, the unloading plate 1, the blanking stretching male 2, the upper material removal block 3 and the secondary punch 4 are separated from the lower mold, and the outer stripping block 7 and the limit rod 6 are no longer subjected to downward pressure. The limit rod 6 that loses the downward pressure will move upward synchronously with the inner support block 10 and the cutter 9 until it is reset. The outer stripping block 7 that loses the downward pressure will move upward until it is reset, and the upward moving outer stripping block 7 will eject the product 36 on the stretching male 8 from the lower mold. After being ejected, the product 36 passes through the shear hole left by the shearing on the material belt 35. At this time, the material belt 35 continues to move forward, bringing the product 36 located in the shear hole out of the mold, and moving the material belt 35 back to the stamping position to prepare for the next stamping of the product 36.

[0041] Beneficial effects of this embodiment: the mold in this solution can achieve stretching, punching and hole turning of the product 36. There is no need to replace the mold during the stamping process of the product 36, which can improve the production efficiency of the product 36 and avoid wasting time when replacing the mold. There is no need to increase the width of the material strip 35 during stamping, which will not increase the production cost of the product 36. In addition, the cutter 9 of the mold in this solution can float in the lower mold. When the punched hole formed on the product 36 is turned, the cutter 9 can move downward to leave a hole turning space for the punch to avoid collision between the punch and the cutter 9 during hole turning.

[0042] Example 2

[0043] Embodiment 2 of a same-station blanking, stretching, punching, and punching composite forming die, as Figure 1-Figure 7 As shown, based on Example 1, the structure of the mold is further limited.

[0044] Specifically, the upper die also includes an upper die seat 11, an upper pad 12, an upper fixed plate 13 and a fixed plate 14 which are fixedly connected in sequence. The blanking and stretching male 2 is fixedly connected to the fixed plate 14. The top surface of the upper stripping block 3 can abut against the upper fixed plate 13. The upper die seat 11 is provided with an inner stripping elastic member 15 and a discharge elastic member 16. One end of the discharge elastic member 16 is fixedly connected to the upper die seat 11, and the other end passes through the upper pad 12, the upper fixed plate 13 and the fixed plate 14 and is fixedly connected to the stripping plate 1; one end of the inner stripping elastic member 15 is fixedly connected to the upper die seat 11, and the other end passes through the upper pad 12 and the upper fixed plate 13 and extends into the inner cavity of the blanking and stretching male 2 and is fixedly connected to the upper stripping block 3. The secondary punch 4 is fixedly connected to the upper fixed plate 13. The inner stripping elastic member 15 and the discharge elastic member 16 are both compression springs.

[0045] Specifically, the lower die also includes a lower lining plate 17, a lower fixed plate 18, a lower pad 19 and a lower die seat 20 which are fixedly connected in sequence. The concave die plate 5 is located on the lower lining plate 17 and is fixedly connected to the lower lining plate 17. The inner support block 10 is located in the inner cavity of the lower pad 19 and is slidably connected to the lower pad 19. The lower die seat 20 is provided with a reset elastic member 21 which abuts against the bottom surface of the inner support block 10. The top of the stretching male 8 passes through the lower fixed plate 18 and the lower lining plate 17 and is located in the inner cavity of the concave die plate 5. The top of the limit rod 6 passes through the lower fixed plate 18, the lower lining plate 17 and the concave die plate 5. The top of the limit rod 6 can also pass through the unloading plate 1 and abut against the fixed plate 14. The bottom surface of the outer stripping block 7 is also provided with a push rod 34. The end of the push rod 34 away from the outer stripping block 7 is provided with a push portion for pushing the outer stripping block 7 to reset. The reset elastic member 21 is a nitrogen spring.

[0046] Specifically, the push part includes a lower support plate 22, a push elastic member 23 and a connecting plate 24 which are fixedly connected in sequence. The connecting plate 24 is also fixedly connected to the lower die base 20. The bottom of the push rod 34 passes through the lower lining plate 17, the lower fixed plate 18, the inner support block 10 and the lower die base 20 and is fixedly connected to the lower support plate 22. When the top surface of the outer stripping block 7 is flush with the top surface of the concave mold plate 5, the top surface of the lower support plate 22 abuts against the bottom surface of the lower die base 20. The push elastic member 23 is a nitrogen spring.

[0047] Specifically, the unloading plate 1 is provided with a guide post 25, the concave template 5 is provided with a guide sleeve hole 26, the bottom surface of the guide post 25 is provided with a chamfer, the guide post 25 can be extended into the guide sleeve hole 26, when the guide post 25 is extended into the guide sleeve hole 26, the side surface of the guide post 25 is in contact with the inner cavity side surface of the guide sleeve hole 26. The upper stripping block 3 is provided with a limiting protrusion 27, the inner cavity of the blanking stretching male 2 is provided with a limiting groove 28, and the limiting protrusion 27 is located in the limiting groove 28. The concave template 5 is provided with a first protrusion 30, and the outer stripping block 7 is provided with a second protrusion 31. When the outer stripping block 7 slides on the stretching male 8, the first protrusion 30 can abut against the second protrusion 31 to limit the maximum sliding position of the outer stripping block 7.

[0048] Specifically, a screw plug 29 is provided on the upper die base 11 to facilitate the disassembly of the inner retraction elastic member 15 and the unloading elastic member 16 . The screw plug 29 is detachably connected to the upper die base 11 .

[0049] The working principle or working process of this embodiment:

[0050] When the material strip 35 on the concave plate 5 advances to the punching position under the traction of the traction unit, the driving unit drives the upper die seat 11 to move downward. The downward movement of the upper die seat 11 can drive the upper die to move downward. When the upper die moves downward, the guide pin 25 on the stripper plate 1 first enters the guide sleeve hole 26 on the concave plate 5, and then the upper die seat 11 continues to move downward until the upper die and the lower die are closed. At this time, the stripper plate 1 and the concave plate 5 are in contact, and the material strip 35 is located between the blanking stretching male 2 and the outer stripping block 7. After the stripper plate 1 and the concave plate 5 are in contact, the upper die seat 11 continues to move downward, and the discharge elastic member 16 is compressed. The blanking stretching male 2 moving downward eats into the concave plate 5 and shears the material strip 35. After the sheared round piece is separated from the material strip 35, it is stretched and formed by the blanking stretching male 2 and the upper stripping block 3 that continue to move downward.

[0051] The upper die seat 11 continues to move downward, the blanking stretching male 2 moves downward to press the outer stripping block 7, so that the outer stripping block 7 and the blanking stretching male 2 move downward synchronously, and the outer stripping block 7 moves downward to press the ejector rod 34 and the lower support plate 22, so that the ejector rod 34 and the lower support plate 22 move downward synchronously, and the lower fixed plate 18 moves downward to squeeze the push elastic member 23. The blanking stretching male 2 moves downward to squeeze the edge of the round sheet between the blanking stretching male 2 and the stretching male 8, forming the side of the product 36.

[0052] When the upper die seat 11 continues to move downward, the unloading elastic member 16 and the inner withdrawal elastic member 15 are continuously compressed, and the upper withdrawal block 3 and the secondary punch 4 punch the round sheet to form the top surface and the punch hole of the product 36. When the upper withdrawal block 3 and the secondary punch 4 punch the round sheet, the reset elastic member 21 can bear the action of the punching force without deformation. When the upper die seat 11 moves downward until the limit rod 6 abuts against the fixed plate 14, the fixed plate 14 presses down the limit rod 6, forcing the reset elastic member 21 to compress, and the inner support block 10 moves downward synchronously, causing the cutter 9 to move downward to leave space for the inner hole turning operation. The cutter 9 moves downward synchronously with the secondary punch 4, and the secondary punch 4 extends into the inner cavity of the stretching male 8 to turn the hole of the product 36.

[0053] After the side of the product 36 is formed, the mold is opened, the upper mold moves upward, the stripper plate 1, the blanking stretching pin 2, the upper stripper block 3 and the secondary punch 4 are separated from the lower mold, and the inner stripper elastic member 15 and the stripper elastic member 16 restore their deformation. Under the drive of the inner stripper elastic member 15 and the stripper elastic member 16 and the gravity of the workpiece, the stripper plate 1 and the upper stripper block 3 are reset. At this time, the outer stripper block 7 and the limit rod 6 are no longer subjected to downward pressure, the reset elastic member 21 and the push elastic member 23 restore their deformation, and drive the inner support block 10 and the lower support plate 22 to reset. The reset of the inner support block 10 will drive the limit rod 6 and the cutter 9 to reset. The reset of the lower support plate 22 will drive the ejector rod 34 and the outer stripper block 7 to reset, and the reset of the outer stripper block 7 will eject the product 36 from the lower mold. After being ejected, the product 36 passes through the shear hole left by the shearing on the material belt 35. At this time, the material belt 35 continues to move forward, bringing the product 36 in the shear hole out of the mold, and moving the material belt 35 back to the stamping position to prepare for the next stamping of the product 36.

[0054] Beneficial effects of this embodiment: After the mold is opened, this solution uses the unloading elastic member 16, the inner retreat elastic member 15, the reset elastic member 21 and the push elastic member 23 to drive the mold to reset and eject the product 36. The elastic member is used as the power source of the push part, and no additional power is required when the mold is reset. After the guide column 25 and the guide sleeve hole 26 are set, when the mold is closed, the guide column 25 and the guide sleeve hole 26 are first matched. The guide column 25 can guide the upper mold moving downward to avoid offset between the upper mold and the lower mold when the mold is closed. The setting of the chamfer on the guide column 25 makes it easier for the guide column 25 to extend into the guide sleeve hole 26. The setting of the limit groove 28 and the limit protrusion 27 can limit the movement range of the upper material withdrawal block 3 in the blanking stretching grove 2 to avoid unsatisfactory stretching effect when the top surface of the product 36 is stretched. The arrangement of the first protrusion 30 and the second protrusion 31 can prevent the outer stripping block 7 from moving upward too far, causing the top surface of the outer stripping block 7 to be higher than the top surface of the concave plate 5, thereby affecting the stamping effect of the product 36. The arrangement of the screw plug 29 makes it easier to disassemble and assemble the elastic member installed on the upper die base 11. Each elastic member has a corresponding screw plug 29. When the elastic member needs to be disassembled, it is only necessary to remove the screw plug 29 corresponding to the elastic member from the upper die base 11.

[0055] Example 3

[0056] Embodiment 3 of a same-station blanking, stretching, punching, and punching composite forming die, as shown in FIG. Figure 1 As shown, based on Example 1 or Example 2, the means for facilitating the feeding of the mold are further limited.

[0057] Specifically, the concave plate 5 is provided with a floating pin 32 for lifting the material strip 35 for feeding, and the floating pin 32 is provided with a slot for engaging the material strip 35. There are a plurality of floating pins 32, and the plurality of floating pins 32 are symmetrically arranged to engage the two sides of the material strip 35. A feeding slot 33 for accommodating the material strip 35 is provided on the top surface of the concave plate 5 at one end away from the floating pin 32, and the bottom surface of the feeding slot 33 is an inclined plane, and the end of the inclined plane away from the floating pin 32 is inclined toward the bottom surface of the concave plate 5.

[0058] Beneficial effects of this embodiment: the lifting pin 32 can lift the material strip 35, and avoid friction between the bottom surface of the material strip 35 and the concave mold plate 5 when the material strip 35 is moving, thereby preventing scratches from being left on the material strip 35. The material groove 33 can facilitate the product 36 to fall off from the mold.

[0059] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A same-station blanking, stretching, punching and punching composite forming die, comprising an upper die and a lower die, characterized in that: The upper die comprises a stripper plate (1), a blanking and stretching pin (2), an upper stripper block (3) and a secondary punch (4); the blanking and stretching pin (2) is slidably connected to the stripper plate (1); the upper stripper block (3) is located in the inner cavity of the blanking and stretching pin (2) and is slidably connected to the blanking and stretching pin (2); the bottom surface of the upper stripper block (3) is arc-shaped; the secondary punch (4) passes through the upper stripper block (3) and is slidably connected to the upper stripper block (3); The lower die comprises a concave die plate (5), a limiting rod (6), an outer stripping block (7), a stretching pin (8), a cutting knife (9), and an inner supporting block (10); the limiting rod (6) can abut against the upper die; the cutting knife (9) is located in the inner cavity of the stretching pin (8) and is slidably connected to the stretching pin (8); the cutting knife (9) and the limiting rod (6) are both located on the inner supporting block (10) and abut against the inner supporting block (10); the inner supporting block (10) can slide up and down; the outer stripping block (7) is sleeved on the stretching pin (8) and is slidably connected to the stretching pin (8); the outer stripping block (7) can be located in the inner cavity of the concave die plate (5); the top surface of the stretching pin (8) can fit with the arc-shaped bottom surface of the upper stripping block (3).

2. A same-station blanking, stretching, punching and punching composite forming die according to claim 1, characterized in that: The upper die also includes an upper die seat (11), an upper pad (12), an upper fixed plate (13) and a fixed plate (14) which are fixedly connected in sequence; the blanking stretching pin (2) is fixedly connected to the fixed plate (14); the top surface of the upper material stripping block (3) can abut against the upper fixed plate (13); an inner stripping elastic member (15) and a material stripping elastic member (16) are provided on the upper die seat (11); one end of the material stripping elastic member (16) is fixedly connected to the upper die seat (11) , and the other end passes through the upper pad (12), the upper fixed plate (13) and the fixed plate (14) to be fixedly connected to the stripping plate (1); one end of the inner withdrawal elastic member (15) is fixedly connected to the upper die seat (11), and the other end passes through the upper pad (12) and the upper fixed plate (13) to extend into the inner cavity of the blanking stretching male (2) and is fixedly connected to the upper stripping block (3); the secondary punch (4) is fixedly connected to the upper fixed plate (13).

3. A same-station blanking, stretching, punching and punching composite forming die according to claim 2, characterized in that: The lower die also includes a lower lining plate (17), a lower fixing plate (18), a lower pad (19) and a lower die seat (20) which are fixedly connected in sequence; the concave die plate (5) is located on the lower lining plate (17) and is fixedly connected to the lower lining plate (17); the inner support block (10) is located in the inner cavity of the lower pad (19) and is slidably connected to the lower pad (19); a reset elastic member (21) abutting against the bottom surface of the inner support block (10) is provided on the lower die seat (20); The top of the stretching rod (8) passes through the lower fixed plate (18) and the lower lining plate (17) and is located in the inner cavity of the concave template (5); the top of the limiting rod (6) can pass through the lower fixed plate (18), the lower lining plate (17) and the concave template (5); the top of the limiting rod (6) can also pass through the unloading plate (1) and abut against the fixed plate (14); the bottom surface of the external disengagement block (7) is also provided with a push rod (34); the end of the push rod (34) away from the external disengagement block (7) is provided with a push portion for pushing the external disengagement block (7) to reset.

4. The same-station blanking, stretching, punching and punching composite forming die according to claim 3, characterized in that: The pushing portion comprises a lower supporting plate (22), a pushing elastic member (23) and a connecting plate (24) which are fixedly connected in sequence; the connecting plate (24) is also fixedly connected to the lower die base (20); the bottom of the push rod (34) passes through the lower lining plate (17), the lower fixed plate (18), the inner supporting block (10) and the lower die base (20) and is fixedly connected to the lower supporting plate (22); when the top surface of the outer stripping block (7) is flush with the top surface of the concave die plate (5), the top surface of the lower supporting plate (22) abuts against the bottom surface of the lower die base (20).

5. The same-station blanking, stretching, punching and punching composite forming die according to claim 3, characterized in that: The unloading plate (1) is provided with a guide column (25), the concave template (5) is provided with a guide sleeve hole (26), the bottom surface of the guide column (25) is provided with a chamfer, the guide column (25) can extend into the guide sleeve hole (26), and when the guide column (25) extends into the guide sleeve hole (26), the side surface of the guide column (25) is in contact with the inner cavity side surface of the guide sleeve hole (26).

6. The same-station blanking, stretching, punching and punching composite forming die according to claim 2, characterized in that: The upper material-removing block (3) is provided with a limiting protrusion (27), the inner cavity of the blanking and stretching pin (2) is provided with a limiting groove (28), and the limiting protrusion (27) is located in the limiting groove (28).

7. The same-station blanking, stretching, punching and punching composite forming die according to claim 2, characterized in that: The upper die base (11) is also provided with a screw plug (29) for facilitating the disassembly and assembly of the inner retraction elastic member (15) and the unloading elastic member (16); the screw plug (29) is detachably connected to the upper die base (11).

8. The same-station blanking, stretching, punching and punching composite forming die according to claim 1, characterized in that: The concave template (5) is provided with a first protrusion (30), and the outer release block (7) is provided with a second protrusion (31). When the outer release block (7) slides on the stretching rod (8), the first protrusion (30) can abut against the second protrusion (31) to limit the maximum sliding position of the outer release block (7).

9. The same-station blanking, stretching, punching and punching composite forming die according to claim 1, characterized in that: The concave mold plate (5) is provided with a floating pin (32) for lifting the material belt (35) for feeding, and the floating pin (32) is provided with a clamping groove for clamping the material belt (35). There are a plurality of floating pins (32), and the plurality of floating pins (32) are symmetrically arranged to clamp the two sides of the material belt (35).

10. A same-station blanking, stretching, punching and punching composite forming die according to claim 9, characterized in that: A material trough (33) for accommodating a material strip (35) is provided on the top surface of the concave mold plate (5) at one end away from the floating pin (32); the bottom surface of the material trough (33) is an inclined plane, and the end of the inclined plane away from the floating pin (32) is inclined toward the bottom surface of the concave mold plate (5).

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