Bending forming die for long-strip-shaped support

Abstract

The utility model relates to the technical field of bending dies, in particular to a bending forming die of a long-strip support, which comprises an upper die and a lower die, and a first forming male die and a second forming male die are arranged on the upper die. The lower die comprises a lower die base, and a forming female die is arranged on the lower die base. The upper die is further provided with a pre-bending male die. The lower die base is further provided with a pre-bending female die capable of being attached to the pre-bending male die. A slope is arranged on the pre-bending female die; a driving assembly is further arranged on the lower die base and used for driving the strip materials to move in the direction from the pre-bending female die to the forming female die. According to the bending die, the problem that in the prior art, when a bending die conducts single bending on a strip material, due to the fact that the strip material has distortion and stress springback, an obtained support product still has certain warping is solved, the strip material can be bent step by step so that residual stress in the strip material can be reduced, springback of the strip material is reduced, and production efficiency is improved. Therefore, the stability of a bracket product can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bending moulds, and more specifically to a bending forming mould for a long strip bracket. Background Art

[0002] The function of the manifold bracket is to support and fix the manifold. Figure 1 The figure shows a common manifold bracket, which is made of thick metal strip by punching and bending.

[0003] The prior art discloses a bending device for steel structure processing, which clamps the steel strips to be bent into two clamping grooves through the designed movable grooves, threaded rods, driving machines, belts, movable blocks, limit seats, clamping grooves and fastening nuts, and then manually rotates the fastening nut on the upper end of the left limit seat downward to limit the steel strips, and starts the driving machine. The driving machine drives the left threaded rod to rotate, and the left threaded rod drives the belt and the right threaded rod to rotate at the same time, so that the two threaded rods can rotate synchronously, and the threaded rod drives the two movable blocks to move backward, so that the steel strips move to the lower end of the extrusion die, which is convenient for the extrusion die to bend the steel strips.

[0004] However, the strips are generally stored in rolls, and the strips are gradually unrolled and fed into the mold for processing. Therefore, the strips fed into the mold are already twisted to a certain extent before bending. In addition, the strips are thick, and the strips are bent once using the bending mold of the prior art. The strips are twisted and the stress rebounds, resulting in a certain degree of warping in the stent product. Therefore, some stent products with high shape accuracy requirements need to be transferred to the shaping mold for leveling and shaping. This not only reduces production efficiency, but also increases production costs. Utility Model Content

[0005] In view of the problem that the bending mold in the above-mentioned prior art performs a single bending on the strip material, the obtained bracket product still has a certain warping problem due to the distortion and stress rebound of the strip material. The utility model provides a bending forming mold for a long strip bracket, which can gradually bend the strip material to improve the shape accuracy and stability of the bracket product.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0007] A bending forming mold for a long strip bracket comprises an upper mold and a lower mold, the upper mold is provided with a first forming punch and a second forming punch; the lower mold comprises a lower mold base, the lower mold base is provided with a bending station, the bending station is provided with a forming die, the forming die is provided with a left groove and a right groove which can be respectively fitted with the first forming punch and the second forming punch; the upper mold is also provided with a pre-bending punch; the lower mold base is also provided with a pre-bending die which can be fitted with the pre-bending mold; the pre-bending die is provided with a pre-bending groove which is connected with the left groove or the right groove, the bottom of the pre-bending groove is provided with a slope, and an angle is formed between the top surface of the slope and the bottom side of the inner wall of the left groove or the right groove; the lower mold base is also provided with a driving assembly, the driving assembly is used to drive the strip material to move from the pre-bending die to the direction where the forming die is located.

[0008] In the above technical scheme, the initial state of the mold is the mold opening state, the strip is first sent to the pre-bending die, then the upper mold and the lower mold are molded together, and the pre-bending convex mold is used to apply pressure to the strip, so that the strip is bent along the top surface shape of the pre-bending die, so that the strip is deformed to a certain extent; then the mold is opened, the driving component pushes the strip from the pre-bending die to the forming die, and then the upper mold and the lower mold are molded together again, and the strip is bent into the shape of the desired bracket product by fitting the forming die and the forming convex mold; then the mold is opened and molded again, and the strip is shaped by the forming die and the forming convex mold to obtain the bracket product. The gradual bending of the strip can reduce the residual stress inside the strip, thereby reducing the rebound of the strip, and thus improving the stability of the bracket product; and after the strip is formed and bent once, the strip is also shaped at least once, which can further adjust the shape of the bracket product and improve the shape accuracy of the bracket product.

[0009] Preferably, the lower die seat is provided with a limiting pressure strip for contacting the top surface of the strip, the limiting pressure strip is located above the forming die and extends from the forming die to the direction where the pre-bending die is located; the upper die is provided with a first avoidance groove, the first avoidance groove is used for the limiting pressure strip to extend into when the upper die and the lower die are closed. The driving component pushes the strip to move under the limiting pressure strip, and the limiting pressure strip can limit the flipping of the strip during the movement, which is conducive to reducing the scrap rate.

[0010] Preferably, a pad is further provided on the lower die seat, the top surface of the pad is flush with the top of the pre-bending die, a cutting station is provided on the pad between the feed end of the lower die and the bending station, a vertical line between the cutting station and the bending station is perpendicular to a vertical line between the pre-bending die and the forming die, a first blanking trough is provided on the cutting station, a cutting punch is provided on the upper die, and the first blanking trough is used for the end of the cutting punch to extend into when the upper die and the lower die are closed. When the mold is opened, the strip passes through the first blanking trough of the cutting station and the pre-bending die of the bending station at the same time, and then the upper die and the lower die are closed, and the cutting punch can pass through the strip and extend into the first blanking trough, thereby cutting the strip. After the cutting punch is set, the cutting and pre-bending processes of the strip are carried out simultaneously, which can shorten the production cycle and improve production efficiency.

[0011] Preferably, a length limiting member is provided on the pre-bending die or the lower die seat, and the length limiting member is at least partially higher than the top of the pre-bending die for abutting against the end of the strip. After the end of the strip moves from the cutting station to the top of the pre-bending die, it continues to move until it abuts against the length limiting member. The length limiting member can limit the stepping distance of the strip, so that the length of the strip segment obtained by each cutting is consistent, which can improve the consistency of the size of the stent product.

[0012] Preferably, the length limiting member is provided with a slot for the end of the strip to extend into and engage with the end of the strip; the pre-bending groove is located on the side of the pre-bending die close to the length limiting member. After the end of the strip moves from the cutting station to the top of the pre-bending die, it can continue to move into the slot and engage with the slot; the strip will be separated from the slot after being pre-bent and deformed. The slot can limit the deviation and swing of the strip, so that each section of the strip can be pre-bent at the same position, which is conducive to improving the consistency of the shape of the bracket product.

[0013] Preferably, a punching station is further provided on the pad, and the punching station is located between the feed end of the lower die and the cutting station. The punching station is provided with a plurality of second blanking slots; the upper die is provided with a plurality of punches, and the second blanking slots are used for the ends of the punches to extend one by one when the upper die and the lower die are closed. The strip material can pass through the second blanking slot of the punching station, the first blanking slot of the cutting station, and the pre-bending die of the bending station at the same time. When the die is closed, the end of the punch passes through the strip material and extends into the second blanking slot, thereby forming a through hole in the strip material. It can be understood that when the upper die and the lower die are closed, the strip material is punched, cut and bent at the same time, which can further shorten the production cycle of the bracket product and improve production efficiency.

[0014] Preferably, the pad is further provided with a plurality of first mounting grooves and a plurality of second mounting grooves, the first mounting groove and the second mounting groove are both distributed along the vertical connection direction of the punching station and the cutting station; a first spring is provided in the first mounting groove, one end of the first spring is connected to the inner wall of the first mounting groove, and the other end is connected to a first guide block, and the first guide block is provided with a first slide groove; a second spring is provided in the second mounting groove, one end of the second spring is connected to the inner wall of the second mounting groove, and the other end is connected to the second guide block, and the second guide block is provided with a second slide groove; the first slide The first slot and the second slot are used for the opposite sides of the strip to pass through respectively; in the initial state, that is, in the mold opening state, the length limiting member is at least partially higher than the first slot or the second slot, so that the strip can be moved into the slot; the upper mold is provided with a plurality of second avoidance slots and a plurality of third avoidance slots; when the upper mold is molded with the lower mold, the ends of the first guide block and the second guide block extend into the second avoidance slot and the third avoidance slot one by one, and the bottoms of the first slot and the second slot are flush with the top surface of the pad, so that the strip can fit the top surface of the pad. Since the strip is gradually rolled out from the material roll and fed into the lower mold, the strip will have a certain degree of warping. The provision of a plurality of first guide blocks and a plurality of second guide blocks can guide the strip to remain straight and move smoothly, so that the strip is more closely fitted with the pad and the pressure plate after the upper mold is molded with the lower mold, and it is also convenient to control the strip to move forward according to a certain path and state, which is conducive to improving the quality of the bracket product.

[0015] Preferably, the upper die includes an upper die base and a pressure plate, the pressure plate is slidably connected to the upper die base along the vertical direction, and the pressure plate is also connected to the upper die base through a third spring; the punch, the cutting punch, the first forming punch, the second forming punch and the pre-bending punch are all connected to the upper die base; the first avoidance groove, the second avoidance groove and the third avoidance groove are all arranged on the pressure plate; the pressure plate is also provided with a first through cavity, a second through cavity and a third through cavity, in an initial state, the end of the punch is located in the first through cavity, the end of the cutting punch is located in the second through cavity, and the end of the first forming punch is located in the third through cavity; when the upper die and the lower die are closed, the end of the punch passes through the first through cavity and then extends into the second blanking groove, the end of the cutting punch passes through the second through cavity and then extends into the first blanking groove, and the end of the first forming punch passes through the third through cavity and fits with the left groove. That is to say, during the mold closing process, the strip material is punched and cut only when it is pressed against the pad by the pressing plate, which can reduce the movement and deformation of the strip material during the punching and cutting process, thereby improving the quality of the bracket product.

[0016] Preferably, the pre-bending die and the forming die are respectively provided with a first positioning hole and a second positioning hole, and the pressure plate is provided with a first positioning pin and a second positioning pin, the first positioning pin is used to pass through the through hole on the strip material and then extend into the first positioning hole when the upper die and the lower die are closed, and the second positioning pin is used to pass through the through hole on the strip material and then extend into the second positioning hole when the upper die and the lower die are closed. Through holes will be punched out of the strip material when it passes through the punching station. When the strip material is pre-bent and formed, the first positioning pin and the second positioning pin can respectively pass through the through hole on the strip material and then extend into the first positioning hole and the second positioning hole. The first positioning pin and the second positioning pin can position the strip material to avoid the deviation of the strip material during the pre-bending and forming bending processes, and can improve the shape accuracy of the bracket product.

[0017] The drive assembly may be one of a cylinder drive assembly, a hydraulic cylinder drive assembly, an electric push rod drive assembly, a gear rack drive assembly and a synchronous belt drive assembly.

[0018] Preferably, the driving assembly includes a cylinder disposed on the lower die seat and a push plate connected to the piston rod of the cylinder, and the push plate is driven by the piston rod extending out of the cylinder to push the strip material to move. The structure of the cylinder is relatively simple, and its response speed is relatively fast, which is conducive to improving the production efficiency of the bracket product.

[0019] Beneficial effects of the utility model:

[0020] (1) The strip is pre-bent by a pre-bending die and a pre-bending punch, and the strip is pushed onto the forming die by a driving assembly for complete bending. The strip is gradually bent, which can reduce the residual stress inside the strip and thus reduce the springback of the strip, thereby improving the stability of the stent product. After the strip is formed and bent once, the strip can be shaped at least once, which can further adjust the shape of the stent product and improve the shape accuracy of the stent product.

[0021] (2) Setting a limit pressure strip can limit the flipping of the strip during movement, which is helpful to reduce the scrap rate.

[0022] (3) A punching punch and a cutting punch are set to punch and cut the strip material respectively, so that the strip material can be punched, cut and bent at the same time, which is conducive to shortening the production cycle and improving production efficiency.

[0023] (4) A length limiting member is provided to limit the stepping distance of the strip material, thereby ensuring that the lengths of the strip material segments obtained after cutting are consistent, which is beneficial to improving the consistency of the size of the stent product.

[0024] (5) The first positioning pin and the second positioning pin are provided to position the strip material, thereby preventing the strip material from shifting during the pre-bending and forming bending processes, thereby improving the quality of the bracket product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a water distributor bracket product in the prior art;

[0026] Figure 2 It is a structural schematic diagram of a bending forming die for a long stent;

[0027] Figure 3 It is a structural diagram of the upper die;

[0028] Figure 4 It is a top view schematic diagram of the lower die;

[0029] Figure 5 It is a structural diagram of the lower die;

[0030] Figure 6 It is a schematic diagram of the structure of the pre-bending die and the forming die;

[0031] Figure 7 It is a schematic diagram of the structure of the first guide block and the second guide block.

[0032] In the attached drawings: 1-upper die; 2-lower die; 3-first forming punch; 4-second forming punch; 5-lower die seat; 501-bending station; 6-forming die; 601-left groove; 602-right groove; 603-first positioning hole; 7-pre-bending punch; 8-pre-bending die; 801-pre-bending groove; 802-slope; 803-second positioning hole; 9-driving assembly; 901-cylinder; 902-push plate; 10-limiting pressure strip; 11-pad; 1101-cutting station; 1102-first blanking trough; 1103-punching station; 1104-second blanking trough ;1105-first mounting groove;1106-second mounting groove;12-cutting punch;13-length limiter;1301-slot;14-punch;15-first guide block;1501-first slide groove;16-second guide block;1601-second slide groove;17-upper die seat;18-pressing plate;1801-first avoidance groove;1802-second avoidance groove;1803-third avoidance groove;1804-first through cavity;1805-second through cavity;1806-third through cavity;19-third spring;20-first positioning pin;21-second positioning pin;22-strip material. DETAILED DESCRIPTION

[0033] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of 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 may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0034] 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.

[0035] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0036] Example 1

[0037] Combination Figures 2 to 5 The bending forming mold of a long strip bracket shown in the figure includes an upper mold 1 and a lower mold 2, the upper mold 1 is provided with a first forming punch 3 and a second forming punch 4; the lower mold 2 includes a lower mold base 5, the lower mold base 5 is provided with a bending station 501, the bending station 501 is provided with a forming die 6, and the forming die 6 is provided with a left groove 601 and a right groove 602 which can be respectively fitted with the first forming punch 3 and the second forming punch 4. Furthermore, a pre-bending punch 7 is also provided on the upper die 1; a pre-bending die 8 which can be fitted with the pre-bending punch 7 is also provided on the lower die base 5, and the top of the pre-bending die 8 is flush with the top of the forming die 6; a pre-bending groove 801 connected to the right groove 602 is provided on the pre-bending die 8, and a slope 802 is provided at the bottom of the pre-bending groove 801, and an angle is formed between the top surface of the slope 802 and the bottom side of the inner wall of the right groove 602; a driving assembly 9 is also provided on the lower die base 5, and the driving assembly 9 is used to drive the strip material 22 to move from the pre-bending die 8 to the direction where the forming die 6 is located.

[0038] Specifically, the width of the forming die 6 is approximately equal to the width of 2.5 strips 22 , where the width is measured in the direction in which the driving assembly 9 drives the strip 22 to move.

[0039] Furthermore, the lower die base 5 is provided with three limiting pressure strips 10 for contacting the top surface of the strip material 22, and the three limiting pressure strips 10 are respectively located above the left side, the middle and the right side of the forming die 6. The limiting pressure strip 10 located in the middle extends from the forming die 6 to the direction where the pre-bending die 8 is located; the limiting pressure strips 10 located on the left and the right are respectively located above the inner wall of the left groove 601 and the inner wall of the right groove 602. Further, the upper die 1 is provided with two first avoidance grooves 1801, and the two first avoidance grooves 1801 are respectively used for the limiting pressure strips 10 located on the left and the middle to extend into when the upper die 1 and the lower die 2 are closed. The driving component 9 pushes the strip material 22 to move below the limiting pressure strip 10, and the limiting pressure strip 10 can limit the flipping of the strip material 22 during the movement, which is beneficial to reduce the scrap rate.

[0040] The working principle or workflow of this embodiment is as follows: the initial state of the mold is the mold opening state, first the strip material 22 is sent to the pre-bending die 8, then the upper mold 1 and the lower mold 2 are molded together, and the pre-bending convex mold 7 is used to apply pressure to the strip material 22, so that the strip material 22 is bent along the top surface shape of the pre-bending die 8, so that the strip material 22 is deformed to a certain extent; then the mold is opened, and the driving component 9 pushes the strip material 22 from the pre-bending die 8 to the forming die 6, and at the same time, a new strip material 22 is sent to the forming die 6, and then the upper mold 1 and the lower mold 2 are closed. The mold is closed again, and the strip material 22 is bent into the required shape of the bracket product by the fitting of the forming die 6 and the forming punch; then the mold is opened again, and the driving assembly 9 pushes the new strip material 22 to move to the forming die 6, so that the strip material 22 originally located on the forming die 6 is pushed by the new strip material 22 by a distance of the width of the strip material 22; then the mold is closed again, and the strip material 22 is shaped by the forming die 6 and the forming punch to obtain the bracket product; finally, the bracket product is separated from the forming die by the push of the previous strip material, and the unloading is completed.

[0041] Beneficial effects of this embodiment:

[0042] (1) The strip is pre-bent by a pre-bending die and a pre-bending punch, and the strip is pushed onto the forming die by a driving assembly for complete bending. The strip is gradually bent, which can reduce the residual stress inside the strip and thus reduce the springback of the strip, thereby improving the stability of the stent product. After the strip is formed and bent once, the strip can be shaped at least once, which can further adjust the shape of the stent product and improve the shape accuracy of the stent product.

[0043] (2) Setting a limit pressure strip can limit the flipping of the strip during movement, which is helpful to reduce the scrap rate.

[0044] Example 2

[0045] This embodiment is based on embodiment 1. Figures 2 to 7As shown, a pad 11 is also provided on the lower die base 5, and the top surface of the pad 11 is flush with the top of the pre-bending die 8. A cutting station 1101 is provided on the pad 11 and is located between the feeding end of the lower die 2 and the bending station 501. The vertical line between the cutting station 1101 and the bending station 501 is perpendicular to the vertical line between the pre-bending die 8 and the forming die 6. A first blanking groove 1102 is provided on the cutting station 1101, and a cutting punch 12 is provided on the upper die 1. The first blanking groove 1102 is used for the end of the cutting punch 12 to extend into when the upper die 1 and the lower die 2 are closed. When the mold is opened, the strip material 22 passes through the first blanking groove 1102 of the cutting station 1101 and the pre-bending concave mold 8 of the bending station 501 at the same time, and then the upper mold 1 is closed with the lower mold 2, and the cutting convex mold 12 can pass through the strip material 22 and extend into the first blanking groove 1102, thereby cutting the strip material 22. After the cutting convex mold 12 is set, the cutting and pre-bending processes of the strip material 22 are carried out simultaneously, which can shorten the production cycle and improve production efficiency.

[0046] Furthermore, a length limiting member 13 is provided on the pre-bending die 8, and a portion of the length limiting member 13 is higher than the top of the pre-bending die 8 for abutting against the end of the strip 22. After the end of the strip 22 moves from the cutting station 1101 to the top of the pre-bending die 8, it continues to move until it abuts against the length limiting member 13. The length limiting member 13 can limit the stepping distance of the strip 22, so that the length of the strip 22 obtained by each cutting is consistent, which can improve the consistency of the size of the stent product.

[0047] Furthermore, the length limiting member 13 is provided with a slot 1301, which is used for the end of the strip 22 to extend into and engage with the end of the strip 22; the pre-bending groove 801 is located on the side of the pre-bending die 8 close to the length limiting member 13. After the end of the strip 22 moves from the cutting station 1101 to the top of the pre-bending die 8, it can continue to move into the slot 1301 and engage with the slot 1301. After the strip 22 is pre-bent, its end will be separated from the slot 1301. The slot 1301 can limit the deviation and swing of the strip 22, so that each section of the strip 22 can be pre-bent at the same position, which is conducive to improving the consistency of the shape of the bracket product.

[0048] Furthermore, a punching station 1103 is provided on the backing plate 11, and the punching station 1103 is located between the feed end of the lower die 2 and the cutting station 1101. The punching station 1103 is provided with a plurality of second blanking grooves 1104; the upper die 1 is provided with a plurality of punches 14, and the second blanking grooves 1104 are used for the ends of the punches 14 to extend one by one when the upper die 1 and the lower die 2 are closed. The strip material 22 can pass through the second blanking grooves 1104 of the punching station 1103, the first blanking grooves 1102 of the cutting station 1101, and the pre-bending concave die 8 of the bending station 501 at the same time. When the die is closed, the end of the punch 14 passes through the strip material 22 and extends into the second blanking grooves 1104, thereby forming a through hole in the strip material 22. It can be understood that when the upper mold 1 and the lower mold 2 are closed, the strip material 22 is punched, cut and bent at the same time, which can further shorten the production cycle of the bracket product and improve the production efficiency.

[0049] Furthermore, the backing plate 11 is also provided with a plurality of first mounting grooves 1105 and a plurality of second mounting grooves 1106, and the first mounting grooves 1105 and the second mounting grooves 1106 are both distributed along the vertical connection direction between the punching station 1103 and the cutting station 1101; a first spring (not shown in the figure) is provided in the first mounting groove 1105, one end of the first spring is connected to the inner wall of the first mounting groove 1105, and the other end is connected to the first guide block 15, and the first guide block 15 is provided with a first slide groove 1501; a second spring (not shown in the figure) is provided in the second mounting groove 1106, one end of the second spring is connected to the inner wall of the second mounting groove 1106, and the other end is connected to the second guide block 16, and the second guide block 16 is provided with a second slide groove 160 1; the first chute 1501 and the second chute 1601 are respectively used for the opposite sides of the strip 22 to pass through; in the initial state, that is, in the mold opening state, the length limiting member 13 is partially higher than the first chute 1501 or the second chute 1601, so that the strip 22 can move into the slot 1301; the upper mold 1 is provided with a plurality of second avoidance grooves 1802 and a plurality of third avoidance grooves 1803; when the upper mold 1 and the lower mold 2 are molded, the ends of the first guide block 15 and the second guide block 16 are extended into the second avoidance groove 1802 and the third avoidance groove 1803 one by one, and the bottoms of the first chute 1501 and the second chute 1601 are both flush with the top surface of the pad 11, so that the strip 22 can fit the top surface of the pad 11. Since the strip 22 is gradually rolled out from the material roll and fed into the lower mold 2, the strip 22 will have a certain degree of warping. Arranging a plurality of first guide blocks 15 and a plurality of second guide blocks 16 can guide the strip material 22 to maintain a straight state and move smoothly, so that the strip material 22 is more closely fitted with the pad 11 and the pressure plate 18 after the upper mold 1 and the lower mold 2 are closed, and it is also convenient to control the strip material 22 to move forward according to a certain path and state, which is beneficial to improving the quality of the bracket product.

[0050] Furthermore, the upper die 1 includes an upper die seat 17 and a pressure plate 18, the pressure plate 18 is slidably connected to the upper die seat 17 along the vertical direction, and the pressure plate 18 is also connected to the upper die seat 17 through a third spring 19; the punch 14, the cutting punch 12, the first forming punch 3, the second forming punch 4 and the pre-bending punch 7 are all connected to the upper die seat 17; the first avoidance groove 1801, the second avoidance groove 1802 and the third avoidance groove 1803 are all arranged on the pressure plate 18; the pressure plate 18 is also provided with a first through cavity 1804, a second through cavity 1805 and a third through cavity 1806, in the initial state, the end of the punch 14 is located in the first through cavity 1804, the end of the cutting punch 12 is located in the second through cavity 1805, and the end of the first forming punch 3 is located in the third through cavity 1806; when the upper die 1 and the lower die 2 are molded, the end of the punch 14 passes through the first through cavity 1804 and then extends into the second blanking groove 1104, the end of the cutting punch 12 passes through the second through cavity 1805 and then extends into the first blanking groove 1102, and the end of the first forming punch 3 passes through the third through cavity 1806 and then fits with the left groove 601. That is to say, in the mold closing process, the strip material 22 is punched and cut only when it is pressed against the pad 11 by the pressing plate 18, which can reduce the movement and deformation of the strip material 22 during the punching and cutting process, thereby improving the quality of the bracket product.

[0051] Furthermore, two first positioning holes 603 and two second positioning holes 803 are respectively provided on the pre-bending die 8 and the forming die 6, and two first positioning pins 20 and two second positioning pins 21 are provided on the pressing plate 18. The first positioning pin 20 is used to pass through the through hole on the strip material 22 and then extend into the first positioning hole 603 when the upper die 1 and the lower die 2 are closed, and the second positioning pin 21 is used to pass through the through hole on the strip material 22 and then extend into one of the second positioning holes 803 when the upper die 1 and the lower die 2 are closed. At least two through holes will be punched out of the strip material 22 when it passes through the punching station 1103. When the strip material 22 is pre-bent and formed, the first positioning pin 20 and the second positioning pin 21 can respectively extend into the first positioning hole 603 and the second positioning hole 803 after passing through two of the through holes on the strip material 22. The first positioning pin 20 and the second positioning pin 21 can position the strip material 22 to avoid the strip material 22 from deviating during the pre-bending and forming bending processes, thereby improving the shape accuracy of the bracket product.

[0052] The other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 1.

[0053] Example 3

[0054] This embodiment further describes the driving component 9 based on the embodiment 2. Figure 4 and Figure 5As shown, the driving assembly 9 includes a cylinder 901 disposed on the lower die base 5 and a push plate 902 connected to the piston rod of the cylinder 901, and the push plate 902 is driven by the piston rod extending out of the cylinder 901 to push the strip 22 to move. The structure of the cylinder 901 is relatively simple, and its response speed is relatively fast, which is conducive to improving the production efficiency of the bracket product.

[0055] The other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 2.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description, and 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 present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A bending forming die for a long bracket, comprising an upper die (1) and a lower die (2), wherein the upper die (1) is provided with a first forming convex die (3) and a second forming convex die (4); the lower die (2) comprises a lower die base (5), wherein the lower die base (5) is provided with a bending station (501), wherein the bending station (501) is provided with a forming die (6), wherein the forming die (6) is provided with a left groove (601) and a right groove (602) which can be respectively fitted with the first forming convex die (3) and the second forming convex die (4); characterized in that: The upper die (1) is also provided with a pre-bending convex die (7); the lower die seat (5) is also provided with a pre-bending concave die (8) that can be fitted with the pre-bending convex die (7); the pre-bending concave die (8) is provided with a pre-bending groove (801) that is connected to the left groove (601) or the right groove (602); the bottom of the pre-bending groove (801) is provided with a slope (802); the top surface of the slope (802) forms an angle with the bottom side of the inner wall of the left groove (601) or the right groove (602); the lower die seat (5) is also provided with a driving component (9), and the driving component (9) is used to drive the strip material to move from the pre-bending concave die (8) to the direction where the forming concave die (6) is located.

2. The bending forming mold of a long bracket according to claim 1, characterized in that: The lower die seat (5) is provided with a limiting pressure strip (10) for contacting the top surface of the strip material, and the limiting pressure strip (10) is located above the forming die (6) and extends from the forming die (6) to the direction where the pre-bending die (8) is located; the upper die (1) is provided with a first avoidance groove (1801), and the first avoidance groove (1801) is used for allowing the limiting pressure strip (10) to extend when the upper die (1) and the lower die (2) are closed.

3. The bending forming mold of a long stent according to claim 2, characterized in that: The lower die seat (5) is also provided with a pad (11), the top surface of the pad (11) is flush with the top end of the pre-bending die (8), the pad (11) is provided with a cutting station (1101) located between the feeding end of the lower die (2) and the bending station (501), the vertical line between the cutting station (1101) and the bending station (501) is perpendicular to the vertical line between the pre-bending die (8) and the forming die (6), the cutting station (1101) is provided with a first blanking groove (1102), the upper die (1) is provided with a cutting punch (12), the first blanking groove (1102) is used for the end of the cutting punch (12) to extend into when the upper die (1) and the lower die (2) are closed.

4. The bending forming mold of the long bracket according to claim 3, characterized in that: The pre-bending die (8) or the lower die seat (5) is provided with a length limiting piece (13), and at least a portion of the length limiting piece (13) is higher than the top end of the pre-bending die (8) and is used to abut against the end of the strip material.

5. The bending forming mold of the long stent according to claim 4, characterized in that: The length limiting member (13) is provided with a slot (1301), and the slot (1301) is used for the end of the strip to extend into and be engaged with the end of the strip; the pre-bending groove (801) is located on a side of the pre-bending die (8) close to the length limiting member (13).

6. The bending forming mold of the long stent according to claim 5, characterized in that: The pad (11) is also provided with a punching station (1103), and the punching station (1103) is located between the feed end of the lower die (2) and the cutting station (1101), and the punching station (1103) is provided with a plurality of second blanking grooves (1104); the upper die (1) is provided with a plurality of punches (14), and the second blanking grooves (1104) are used for allowing the ends of the punches (14) to extend one by one when the upper die (1) and the lower die (2) are closed.

7. The bending forming mold of the long bracket according to claim 6, characterized in that: The pad (11) is also provided with a plurality of first mounting grooves (1105) and a plurality of second mounting grooves (1106), and the first mounting grooves (1105) and the second mounting grooves (1106) are both distributed along the vertical connection direction between the punching station (1103) and the cutting station (1101); a first spring is provided in each of the first mounting grooves (1105), one end of the first spring is connected to the inner wall of the first mounting groove (1105), and the other end is connected to a first guide block (15), and the first guide block (15) is provided with a first slide groove (1501); a second spring is provided in each of the second mounting grooves (1106), one end of the second spring is connected to the inner wall of the second mounting groove (1106), and the other end is connected to a second guide block (16), and the second guide block (16) is provided with a second slide groove (1601); the first slide groove (1501) and the second slide groove (1601) are respectively used for the opposite sides of the strip material to pass through; in the initial state, the length limiting member (13) is at least partially higher than the first slide groove (1501) or the second slide groove (1601); a plurality of second avoidance grooves (1802) and a plurality of third avoidance grooves (1803) are provided on the upper mold (1); when the upper mold (1) and the lower mold (2) are molded together, the ends of the first guide block (15) and the second guide block (16) extend into the second avoidance groove (1802) and the third avoidance groove (1803) one by one, and the bottoms of the first slide groove (1501) and the second slide groove (1601) are both flush with the top surface of the pad (11).

8. The bending forming mold of the long bracket according to claim 7, characterized in that: The upper die (1) comprises an upper die base (17) and a pressure plate (18), wherein the pressure plate (18) is slidably connected to the upper die base (17) along a vertical direction, and the pressure plate (18) is also connected to the upper die base (17) via a third spring (19); the punch (14), the cutting punch (12), the first forming punch (3), the second forming punch (4) and the pre-bending punch (7) are all connected to the upper die base (17); the first avoidance groove (1801), the second avoidance groove (1802) and the third avoidance groove (1803) are all arranged on the pressure plate (18); the pressure plate (18) is also provided with a first through cavity (1804), a second through cavity (1805) and a third through cavity ( 1806), in the initial state, the end of the punch (14) is located in the first through cavity (1804), the end of the cutting punch (12) is located in the second through cavity (1805), and the end of the first forming punch (3) is located in the third through cavity (1806); when the upper die (1) and the lower die (2) are closed, the end of the punch (14) passes through the first through cavity (1804) and then extends into the second blanking groove (1104), the end of the cutting punch (12) passes through the second through cavity (1805) and then extends into the first blanking groove (1102), and the end of the first forming punch (3) passes through the third through cavity (1806) and then fits with the left groove (601).

9. The bending forming mold of the long stent according to claim 8, characterized in that: The pre-bending die (8) and the forming die (6) are respectively provided with a first positioning hole (603) and a second positioning hole (803); the pressing plate (18) is provided with a first positioning pin (20) and a second positioning pin (21); the first positioning pin (20) is used to pass through a through hole on the strip material and extend into the first positioning hole (603) when the upper die (1) and the lower die (2) are in mold combination; the second positioning pin (21) is used to pass through a through hole on the strip material and extend into the second positioning hole (803) when the upper die (1) and the lower die (2) are in mold combination.

10. A bending and forming die for a long stent according to any one of claims 1 to 9, characterized in that: The driving assembly (9) comprises a cylinder (901) arranged on the lower die base (5) and a push plate (902) connected to the piston rod of the cylinder (901), and the push plate (902) is driven by the piston rod extending out of the cylinder (901) to push the strip material to move.

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