Pull rod forming tool

Abstract

The utility model discloses a pull rod forming tool which comprises a workbench, the workbench is provided with a first stamping module for stamping a first notch and a bending groove in a pull rod, the first stamping module comprises a second stamping module for stamping a first hole in the pull rod, and the third stamping module is used for stamping a second hole in the pull rod and bending the end of the pull rod. The second punching module comprises a second lower die and a first punching needle moving up and down relative to the second lower die, the second lower die is provided with a material inserting notch allowing a pull rod to be inserted therein, a first filling block is fixedly arranged in the material inserting notch, and a gap allowing the pull rod to be inserted therein is reserved between the outer wall of the first filling block and the inner wall of the material inserting notch. The first filling block is provided with a punching hole allowing the first punching needle to be inserted therein, the bottom wall of the second lower die is provided with a third discharging opening aligned with the punching hole, the hole diameter of the third discharging opening is larger than that of the punching hole, the mode that laser cutting is replaced with punch forming is used, the technical summary to operators is reduced, and the production efficiency of the pull rod is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tie rod forming technology, in particular to a tie rod forming tool. Background Art

[0002] Pull rods are mainly used in office furniture to fix two adjacent parts, strengthen the firmness between the two adjacent parts, and improve the stability of the furniture.

[0003] Usually, the tie rod is a hollow steel pipe with a square longitudinal section. In order to facilitate the connection between the tie rod and the components, it is necessary to process a groove on the end of the tie rod and then fix it with the other components with hardware.

[0004] Among them, the structure diagram of the formed tie rod end is as follows Figure 1 As shown in A4, under normal circumstances, the pull rod in A4 is first cut by laser to cut a bending groove 12 as shown in A3 at the end of the pull rod, where the groove angle of the bending groove 12 is 90°, and then the bending groove position at the end of the pull rod is bent to retract the laser-cut groove inward to improve the smoothness of the pull rod surface and prevent burrs from injuring people.

[0005] Conventional tie rod forming methods require the use of laser cutting equipment, which has high requirements for the equipment and requires the operator to have skilled operating skills. The tie rods prepared by laser cutting consume a lot of energy, and laser cutting can only cut one at a time, so the processing efficiency of the tie rods is low.

[0006] Therefore, how to design a tie rod forming tool that reduces the tie rod manufacturing cost and improves the tie rod preparation efficiency has become a technical problem that needs to be solved urgently by people in this field. Utility Model Content

[0007] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a tie rod forming tool to solve the problems of low efficiency, high technical requirements and high energy consumption of laser cutting tie rod forming.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A tie rod forming tool comprises a workbench, on which is provided a first stamping die set for stamping out a first notch and a bending groove on the tie rod, a second stamping die set for stamping out a first hole on the tie rod, and a third stamping die set for stamping out a second hole on the tie rod and bending the end of the tie rod, the second stamping die set comprises a second lower die and a first punch needle which moves up and down relative to the second lower die, the second lower die is provided with an insertion notch for inserting the tie rod, a first filling block is fixedly provided in the insertion notch, a gap is reserved between the outer wall of the first filling block and the inner wall of the insertion notch for inserting the tie rod, the first filling block is provided with a punching hole for inserting the first punch needle, the bottom wall of the second lower die is provided with a third discharge port aligned with the punching hole, the aperture of the third discharge port is larger than the aperture of the punching hole.

[0010] Furthermore, the punching hole also includes a first bell mouth opening downward, wherein a small diameter end of the first bell mouth is connected to the punching hole, and a large diameter end of the first bell mouth is connected to the bottom wall of the first filling block.

[0011] Furthermore, the third discharge port comprises a second bell mouth, a small diameter end of the second bell mouth is connected to the third discharge port, and a large diameter end of the second bell mouth is connected to the bottom wall of the insertion slot.

[0012] Furthermore, a limit seat aligned with the inserting slot is installed on the workbench. When the pull rod punches the first hole, the pull rod is inserted into the inserting slot and the end wall of the pull rod abuts against the limit seat.

[0013] Furthermore, the first stamping die set includes a first lower die and a first upper die. The first lower die is provided with a first stamping groove which is recessed downward and passes through the front and rear walls of the first lower die. The bottom wall of the first lower die is also provided with a connecting groove connected to the first stamping groove. The side wall of the first upper die is slidably connected to the inner wall of the connecting groove along the longitudinal direction. The bottom wall of the first lower die is provided with a first discharge port connected to the first stamping groove. The side wall of the first upper die is fixedly provided with a first stamping block extending into the first stamping groove. When the first groove is stamped, the first stamping block is filled into the inner cavity of the pull rod.

[0014] Furthermore, the bottom wall of the first lower mold is provided with a second stamping groove which is recessed downward and connected to the connecting groove, the front wall of the first lower mold is provided with an insertion port connected to the second stamping groove, the bottom wall of the first lower mold is provided with a second discharge port connected to the second stamping groove, the first upper mold is provided with a second stamping block extending to the second stamping groove, the second stamping block is provided with a bending stamping block for stamping out a bending groove, and when the bending groove is stamped, the bending stamping block and the second stamping block are filled in the inner cavity of the pull rod.

[0015] Furthermore, a magnet is fixedly provided on the top wall of the first lower mold.

[0016] Furthermore, the third stamping die set includes a third lower die and a third upper die, the third lower die is fixedly provided with a lifting seat extending upward, the lifting seat is provided with a second filling block that fills the inner cavity of the pull rod, the third upper die is fixedly provided with a bending seat extending downward and a second punch needle, the second filling block is provided with a punching cavity for inserting the second punch needle, when the pull rod is bent, the bending groove of the pull rod extends out of the second filling block, the side wall of the bending seat is offset from the side wall of the second filling block, and the bottom wall of the bending seat is located directly above the bending groove.

[0017] Furthermore, the third stamping die group also includes a first push seat located below the third upper die, a spring is provided between the top wall of the first push seat and the bottom wall of the third upper die, a third guide seat extending upward is fixedly provided on the top wall of the first push seat, a gap is provided between the top wall of the third guide seat and the bottom wall of the third upper die for the third upper die to press downward, and the bending seat and the second punch needle extend downward through the first push seat.

[0018] Furthermore, a first limiting column extending upward is fixedly provided on the top wall of the third lower mold, the top wall of the first limiting column is higher than the top wall of the second filling block, and the difference between the top wall of the first limiting column and the top wall of the second filling block is greater than the wall thickness of the pull rod.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the utility model adopts the first stamping die set, the second stamping die set and the third stamping die set, and utilizes the stamping forming processing method to replace the traditional laser cutting method to realize the forming of the tie rod, thereby reducing the technical requirements for the operator, reducing the equipment investment cost, decomposing the tie rod forming steps, and improving the forming efficiency of the tie rod;

[0020] The inner cavity of the pull rod is filled with the first filling block inside the insertion slot to prevent the side wall of the pull rod from being deformed during the punching process of the first hole, and the punching hole is used to pre-store the waste. When the pull rod is pulled out of the second lower mold, since the aperture of the third discharge port is larger than that of the punching hole, it is convenient to receive the waste after stamping, thereby reducing the risk of waste remaining between the first filling block and the insertion slot, and completing the discharge of the waste in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the tie rod forming steps;

[0022] Figure 2 It is a structural schematic diagram of the molding tool of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the first stamping die set of the utility model;

[0024] Figure 4 is a schematic diagram of the expansion of the first stamping die set;

[0025] Figure 5 A first angle cross-sectional view of the first stamping die set;

[0026] Figure 6 A second angle cross-sectional view of the first stamping die set;

[0027] Figure 7 is a structural schematic diagram of the second stamping die set;

[0028] Figure 8 is a cross-sectional view of a second stamping die set;

[0029] Fig. 9 is a structural schematic diagram of the third stamping die set;

[0030] Fig.10 is a cross-sectional view of the third stamping die set in the first state;

[0031] Fig.11 is a cross-sectional view of the third stamping die set in the second state;

[0032] Fig.12 This is a cross-sectional view of the third stamping die assembly in the third state.

[0033] In the figure: 1, pull rod; 10, first notch; 11, first hole; 12, bending groove; 13, second hole; 2, workbench; 21, waste storage groove; 3, first stamping die set; 31, first lower die; 311, first stamping groove; 3111, first discharge port; 312, second stamping groove; 3121, second discharge port; 313, connecting groove; 314, insertion port; 315, first guide seat; 32, first upper die; 321, guide notch; 322, first stamping block; 323, positioning seat; 3231, second stamping block; 3232, bending stamping block; 33, magnet; 4, second stamping die set; 41, mounting seat; 42, limit seat; 43, first filling block; 431, stamping Material hole; 4311, first bell mouth; 44, second lower die; 441, insertion slot; 442, punch needle guide hole; 443, third discharge port; 4431, second bell mouth; 45, second upper die; 451, first punch needle; 5, third stamping die set; 51, third lower die; 511, first limit column; 512, plug-in slot; 513, fourth discharge port; 514, first guide hole; 521, lifting seat; 522, second filling block; 5221, punching cavity; 53, first push seat; 531, first guide column; 54, third upper die; 55, second punch needle; 56, bending seat; 561, bending notch; 57, spring; 58, second guide seat; 59, third guide seat. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] This embodiment provides a tie rod forming tool, which mainly simplifies the steps of tie rod forming, reduces the requirements for manual technology, and improves the efficiency of tie rod forming.

[0036] In this embodiment, the up, down, left, right, front, and back directions can refer to Figure 4 .

[0037] In this embodiment, if Figure 1 As shown, the end of the tie rod 1 is formed by stamping instead of traditional laser cutting, which reduces the production cost of the equipment, reduces the technical requirements of the operator, and improves the efficiency of forming the tie rod 1.

[0038] In this embodiment, the tie rod 1 is a hollow square tube with a rectangular cross section, wherein the specific steps of forming the tie rod 1 are as follows:

[0039] In the first step, a first notch 10 is punched out of one side wall of a complete square tube A0 end, as shown in A1;

[0040] In the second step, the tie rod A1 punched in the first step is punched out with a first hole 11 on one side of the first notch 10, as shown in A2;

[0041] The third step is to place the A2 tie rod into the stamping die set through the first notch 10, punch out the side walls on both sides of the tie rod 1 and reserve a bending groove 12, as shown in A3;

[0042] In the fourth step, the pull rod A3 is bent along the bending groove 12, and a second hole 13 is punched out on the pull rod 1, as shown in A4.

[0043] Specifically, in order to achieve rapid prototyping of the pull rod 1, in this embodiment, Figure 2 As shown, it includes a workbench 2, wherein the workbench 2 is installed with a first stamping die set 3, a second stamping die set 4 and a third stamping die set 5. Specifically, the first stamping die set 3 is used for the stamping operations in the first and third steps of the forming process of the pull rod 1, and punches out the first notch 10 and the bending groove 12; the second stamping die set 4 is used for the stamping in the second step of the forming process of the pull rod 1, and mainly punches out the first hole 11; the third stamping die set 5 is used for the stamping of the second hole 13 in the fourth step of the forming process of the pull rod 1 and the bending at the bending groove 12.

[0044] In order to collect the stamped waste, in this embodiment, Figure 2 As shown, a waste receiving groove 21 is provided on the workbench 2 and is located below the first stamping die set 3 , the second stamping die set 4 and the third stamping die set 5 , and the waste receiving groove 21 is used to collect the waste that falls.

[0045] In this embodiment, the tie rod 1 is redefined, wherein the cross section of the tie rod 1 is rectangular, a relatively narrow surface of the tie rod 1 is defined as a first side surface, and a relatively wide surface is defined as a second side surface.

[0046] Specifically, Figure 1 As shown, the first notch 10 and the first hole 11 are opened on the first side surface, the second hole 13 is opened on the first side surface opposite to the first notch 10; and the bending groove 12 is opened on the second side surface.

[0047] In this embodiment, if Figure 2 and Figure 3 As shown, the first stamping die set 3 includes a first lower die 31 and a first upper die 32, wherein the first lower die 31 is fixedly mounted on the table top of the workbench 2, the first upper die 32 cooperates with the first lower die 31 and can move up and down relative to the first lower die 31, and the mutual cooperation between the first upper die 32 and the first lower die 31 can realize the stamping forming of the first notch 10 and the bending groove 12 on the pull rod 1.

[0048] Specifically, Figure 3 As shown, the upper wall of the first lower mold 31 is provided with a first punching groove 311 opening upward, and the first punching groove 311 penetrates the end wall of the first lower mold 31 from front to back, and the upper wall of the first lower mold 31 is also provided with a second punching groove 312 extending downward, and the upper wall of the first lower mold 31 is also provided with a connecting groove 313 connecting the first punching groove 311 and the second punching groove 312, as shown in FIG. Figure 4 As shown, the first upper mold 32 is inserted into the connecting groove 313, and the outer wall of the first upper mold 32 is slidably connected to the side wall of the connecting groove 313 up and down.

[0049] like Figure 2 , Figure 4 and Figure 6 As shown, a first stamping block 322 extending into the first stamping groove 311 is fixedly provided on the first upper mold 32, and a first discharge port 3111 connected to the first stamping groove 311 is provided on the bottom wall of the first lower mold 31, wherein the cross-section of the first stamping block 322 is rectangular, the first stamping block 322 can be inserted into the port of the pull rod 1, and the side walls on the left and right sides of the first stamping block 322 can abut against the left and right inner walls of the port of the pull rod 1.

[0050] Specifically, since the pull rod 1 only needs to be stamped on one side thereof, in order to prevent the hollow pull rod 1 from deforming when the first stamping block 322 stamps out the first notch 10, in this embodiment, Figure 6 As shown, at this time, the bottom wall of the first punching block 322 is higher than the bottom wall of the first punching groove 311, and at the same time, a gap is left between the bottom wall of the first punching block 322 and the bottom wall of the first punching groove 311 for the end of the pull rod 1 to be inserted; when the pull rod 1 is inserted into the first punching groove 311, the two opposite first side surfaces of the pull rod 1 are distributed up and down, and the two opposite second side surfaces of the pull rod 1 are distributed left and right and abut against the side wall of the first punching groove 311; the first punching block 322 is received in the end of the pull rod 1, and at the same time, the end wall of the pull rod 1 abuts against the side wall of the first upper mold 32 to limit the insertion depth of the pull rod 1, and then the first upper mold 32 is pushed to Move downward to move the first punching block 322 into the first discharge port 3111, and use the shear force of the first punching block 322 on the pull rod 1 to punch out the first notch 10 on the first side surface of the pull rod 1; because the bottom wall of the first punching block 322 directly abuts against the inner wall of the pull rod 1 when the first punching block 322 punches the first notch 10, the risk of deformation of the pull rod 1 can be reduced; at the same time, the waste punched by the first punching block 322 will fall downward through the first discharge port 3111, and then be received by the waste receiving groove 21 of the workbench 2; thereby realizing the first step of stamping the first notch 10 of the pull rod 1.

[0051] In order to ensure that the first upper mold 32 and the first lower mold 31 slide up and down stably, in this embodiment, Figure 4 As shown, the side wall of the first upper mold 32 is provided with a guide notch 321, and the side wall of the connecting groove 313 is fixedly provided with a first guide seat 315 inserted into the guide notch 321, wherein the side wall of the first guide seat 315 is slidably connected to the inner wall of the guide notch 321.

[0052] In order to punch out the bending groove 12 on the second side surface of the pull rod 1 and prevent the pull rod 1 from bending during the punching process, in this embodiment, Figure 4 and Figure 5 As shown, the front wall of the first lower mold 31 is provided with an insertion port 314 extending backward and connected to the second stamping groove 312, wherein a positioning seat 323 extending forward is fixedly provided on the front wall of the first upper mold 32, and the front wall of the positioning seat 323 abuts against the front wall of the second stamping groove 312, and can slide relative to each other in the up and down directions, thereby enhancing the sliding stability of the first upper mold 32.

[0053] The positioning seat 323 is fixedly provided with a second punching block 3231 located in the second punching groove 312, wherein a bending punching block 3232 for punching out the bending groove 12 is provided on the side wall of the second punching block 3231. Figure 5As shown, a gap is left between the left side wall of the second punching block 3231 and the left side wall of the second punching groove 312 for the insertion of the pull rod 1 .

[0054] Specifically, Figure 2 As shown, the bottom wall of the first lower mold 31 is provided with a second discharge port 3121 connected to the second stamping groove 312. When the stamping forming of the bending groove 12 in the third step needs to be completed, as shown in FIG. Figure 2 As shown, viewed from the front, the second punching block 3231 is located in the middle position of the insertion port 314, and there is a gap between the left side wall, bottom wall and top wall of the second punching block 3231 and the inner wall of the insertion port 314; during the punching process, the two opposite second side surfaces of the pull rod 1 are distributed up and down, and the first notch 10 is facing the side of the positioning seat 323, and the pull rod 1 is inserted from the insertion port 314 to the second punching groove 312, and the second punching block 3231 enters into the inner cavity of the pull rod 1 through the first notch 10. When the inner wall of the first notch 10 abuts against the front wall of the second punching block 3231, When the pull rod 1 is installed in place and the first upper mold 32 moves downward and is inserted into the second discharge port 3121, the second punching block 3231 forms a shear force on the pull rod 1, and then punches out a bending groove 12 on the second side surface of the bottom. At this time, the punched waste falls downward from the second discharge port 3121 into the waste receiving groove 21, and then the first upper mold 32 is moved upward. At this time, the second punching block 3231 and the bending punching block 3232 punch out a bending groove 12 on the second side surface of the top of the pull rod 1. At this time, the punched waste is discharged outward through the top port of the second punching groove 312.

[0055] In order to prevent the waste discharged from the top of the second punching groove 312 from moving randomly, in this embodiment, as shown in FIG. Figure 2 and Figure 3 As shown, a magnet 33 is fixedly provided on the top wall of the first lower mold 31. When the waste is discharged from the top of the second punching groove 312, it is attracted by the magnet 33 to prevent the punched waste from moving randomly.

[0056] In order to complete the operation of the third step on the first side surface of the first notch 10, the first hole 11 is punched out. In this embodiment, Figure 7 and Figure 8As shown, the second punching die set 4 includes a second lower die 44, wherein an insertion slot 441 for inserting the pull rod 1 is provided between the front wall and the rear wall of the second lower die 44, and a limit seat 42 is provided at the rear of the second lower die 44 to limit the insertion position of the pull rod 1. When the pull rod 1 passes through the insertion slot 441, so that the end of the pull rod 1 abuts against the front wall of the limit seat 42, the insertion of the pull rod 1 is completed. The top wall of the second lower die 44 is provided with a punch guide hole 442 connected to the insertion slot 441, and also includes a second upper die 45, on which a first punch 451 is fixedly provided to be inserted into the punch guide hole 442, so as to punch out the first hole 11 in the pull rod 1.

[0057] Through the above arrangement, the two opposite first side surfaces of the pull rod 1 are arranged up and down, and the first notch 10 is located on the upper side. Figure 8 As shown, the pull rod 1 is then inserted into the insertion slot 441 , and the end wall of the pull rod 1 is brought into contact with the limit seat 42 . At this time, the second upper mold 45 is moved downward, thereby driving the first punch needle 451 to move downward, so that the first hole 11 can be punched out on the pull rod 1 .

[0058] In order to prevent the first punching needle 451 from causing the first side surface of the pull rod 1 to deform during the punching process on the pull rod 1, in this embodiment, Figure 7 and Figure 8 As shown, the front wall of the limit seat 42 is fixedly provided with a first filling block 43 extending forward and passing through the insertion slot 441, wherein a gap is reserved between the side wall of the first filling block 43 and the inner wall of the insertion slot 441 for the pull rod 1 to be inserted, and a punching hole 431 aligned with the punch needle guide hole 442 is fixedly provided on the first filling block 43. When the first punch needle 451 moves downward, it passes through the pull rod 1 and extends into the inner cavity of the pull rod 1. At this time, the end of the first punch needle 451 is located in the punching hole 431, and the waste material is retained in the punching hole 431. The side wall of the first filling block 43 is abutted against the side wall of the inner cavity of the pull rod 1 to fill the inner cavity of the pull rod 1, thereby preventing the first punch needle 451 from causing the first side surface of the pull rod 1 to be deformed during the stamping process.

[0059] In order to discharge the waste material remaining in the punching hole 431, in this embodiment, Figure 8 As shown, the bottom wall of the second lower mold 44 is provided with a third discharge port 443 connected to the insertion slot 441, wherein the third discharge port 443 is aligned with the punching hole 431 on the first filling block 43. When the pull rod 1 is pulled out of the insertion slot 441, the waste located in the punching hole 431 will fall into the third discharge port 443, and then the waste will fall into the waste receiving groove 21.

[0060] In this embodiment, in order to facilitate the installation of the second lower mold 44 and the limiting seat 42, in this embodiment, as shown in FIG. Figure 7 and Figure 8 As shown, the second stamping die set 4 further includes a mounting seat 41 , wherein the second lower die 44 and the limiting seat 42 are both fixedly mounted on the top wall of the mounting seat 41 , and the mounting seat 41 is fixedly mounted on the workbench 2 .

[0061] In order to prevent the waste material punched down by the first punching needle 451 from getting stuck in the punching hole 431, in this embodiment, Figure 8 As shown, the punching hole 431 also includes a first bell-shaped mouth 4311, wherein the first bell-shaped mouth 4311 opens downward. After the first punch needle 451 punches the waste from the pull rod 1, the first punch needle 451 moves downward to punch the waste into the first bell-shaped mouth 4311. Since the diameter of the first bell-shaped mouth 4311 is larger than the diameter of the first punch needle 451, the waste can be prevented from getting stuck in the punching hole 431. Since the pull rod 1 is not pulled out of the insertion slot 441 at this time, the waste is located in the inner cavity of the pull rod 1 and is restricted by the second side surface at the bottom of the pull rod 1, so that the waste remains in the first bell-shaped mouth 4311.

[0062] When the pull rod 1 is pulled out from the insertion slot 441, in order to allow the waste to accurately fall into the third discharge port 443 and be discharged downward, and to prevent the waste from remaining in the gap between the bottom wall of the first filling block 43 and the bottom wall of the insertion slot 441, in this embodiment, Figure 8 As shown, the top of the third discharge port 443 is provided with a second bell mouth 4431 opening upward, wherein the second bell mouth 4431 is aligned with the first bell mouth 4311, and the diameter of the third discharge port 443 is larger than the diameter of the waste material, and the second bell mouth 4431 is used to dock the waste material to prevent the waste material from falling into the gap between the first filling block 43 and the insertion slot 441. The problem of the waste material getting stuck in the second lower mold 44 is solved.

[0063] It is worth noting that, during the preparation of the tie rod 1, the reason for setting the stamping of the bending groove 12 after the stamping step of the first notch 10 is that if the stamping of the bending groove 12 is performed without stamping the first notch 10 on the tie rod 1, the tie rod 1 cannot be inserted into the second stamping groove 312 during the insertion process of the tie rod 1 into the insertion port 314, and cannot abut against the front wall of the first upper mold 32, resulting in the second stamping block 3231 being unable to be inserted into the inner cavity of the tie rod 1, thereby affecting the stamping of the bending groove 12. Therefore, it is necessary to place the stamping step of the first notch 10 before the stamping step of the bending groove 12.

[0064] The reason why the stamping step of the bending groove 12 needs to be placed after the stamping step of the first hole 11 is that if the bending groove 12 is stamped first and then the first hole 11 is stamped, the bending groove 12 is formed on the second side surface of the front end of the pull rod 1. During the stamping process of the first hole 11, the pull rod 1 needs to be put on the first filling block 43 and then the end of the pull rod 1 is abutted against the limit seat 42. If the bending groove 12 is pre-formed, the end of the pull rod 1 is easily bent around the position of the bending groove 12 during the abutment between the pull rod 1 and the limit seat 42, which will change the stamping position of the first hole 11 on the pull rod 1 and affect the accuracy of the position of the first hole 11.

[0065] In order to be able to punch out the second hole 13 opposite to the first notch 10 and complete the bending of the end of the tie rod 1, therefore, in this embodiment, Fig. 9 As shown, the third stamping die set 5 includes a third lower die 51 and a third upper die 54, wherein the third lower die 51 is provided with a stamping seat for positioning the pull rod 1, and the third upper die 54 is fixedly mounted with a downwardly extending bending seat 56 and a second punch needle 55, wherein the second punch needle 55 is used to punch out a second hole 13 on the first side surface of the pull rod 1, and the bending seat 56 is used to abut against the end side wall of the pull rod 1 to bend the pull rod 1 around the position of the bending groove 12.

[0066] Specifically, in this embodiment, if Fig. 9 and Fig.10 As shown, the punching seat includes a lifting seat 521 and a second filling block 522 , wherein the lifting seat 521 is fixedly mounted on the top wall of the third lower mold 51 , and the second filling block 522 is fixedly mounted on the top wall of the lifting seat 521 .

[0067] With the above settings, Fig.10 As shown, after the pull rod completes steps A1, A2, and A3, the first side surface of the pull rod 1 where the first notch 10 is located is facing downward, and then the pull rod 1 is sleeved on the second filling block 522, and the bending groove 12 of the pull rod 1 extends out of the second filling block 522. At this time, the inner wall of the first notch 10 abuts against the front wall of the lifting seat 521, limiting the continued insertion of the pull rod 1, and the top wall of the inner cavity of the pull rod 1 abuts against the top wall of the second filling block 522. At this time, the third upper mold 54 is moved downward, and the second punch 55 is used to punch out the second hole 13 on the side wall of the pull rod 1. At the same time, the bending seat 56 bends the bending groove 12 extending from the second filling block 522.

[0068] In order to enable the second punching needle 55 to pass through the side wall of the pull rod 1 and punch out the second hole 13, in this embodiment, Fig.10As shown, a punching cavity 5221 is provided on the second filling block 522, wherein the punching cavity 5221 is located directly below the second punch needle 55. When the second punch needle 55 passes through the side wall of the pull rod 1, the end of the second punch needle 55 is inserted into the punching cavity 5221, and the waste material punched out of the second hole 13 falls into the punching cavity 5221.

[0069] In order to discharge the waste material in the punching cavity 5221 downward, in this embodiment, Fig.10 As shown, the third lower mold 51 is provided with a fourth discharge port 513 connected to the punching cavity 5221, wherein the aperture of the fourth discharge port 513 is larger than the aperture of the waste material, and the fourth discharge port 513 is used to guide the waste material in the punching cavity 5221 into the waste receiving groove 21.

[0070] Specifically, in this embodiment, if Fig.10 As shown, a bending notch 561 is provided on the bending seat 56, wherein the front wall of the bending seat 56 and the rear wall of the second filling block 522 are located on the same vertical plane, and a gap is reserved between the inner wall of the vertical side of the bending notch 561 and the rear wall of the second filling block 522 for storing a portion of the pull rod 1 extending out of the second filling block 522, and the end wall of the pull rod 1 abuts against the vertical side wall of the bending notch 561, and the bending groove 12 is ninety degrees.

[0071] Specifically, in this embodiment, if Fig. 9 and Fig.10 As shown, the third stamping die set 5 further includes a first push seat 53 located below the third upper die 54 , wherein the first push seat 53 is horizontally arranged, and a spring 57 is installed between the top wall of the first push seat 53 and the bottom wall of the third upper die 54 .

[0072] In order to improve the stability of the third punching die set 5 in punching and bending the tie rod 1, in this embodiment, Fig. 9 As shown, a third guide seat 59 extending upward is fixedly provided on the first push seat 53, a first guide column 531 passing through the third guide seat 59 and extending downward is provided on the bottom wall of the third upper mold 54, and a first guide hole 514 for inserting the first guide column 531 is fixedly provided on the third lower mold 51; wherein, a gap is reserved between the top wall of the third guide seat 59 and the bottom wall of the third upper mold 54 for the third upper mold 54 to continue pressing downward.

[0073] In order to prevent the third upper mold 54 and the first push seat 53 from being directly pressed on the pull rod 1 during the downward pressing process, causing the pull rod 1 to be compressed and deformed, in this embodiment, Fig. 9 and Fig.10As shown, a first limiting column 511 extending upward is fixedly provided on the third lower mold 51, wherein the bottom wall of the first limiting column 511 is higher than the top wall of the second filling block 522; specifically, the distance that the first limiting column 511 exceeds the second filling block 522 is greater than or equal to the wall thickness of the pull rod 1. In the present embodiment, the distance between the top wall of the first limiting column 511 and the top wall of the second filling block 522 is equal to the wall thickness of the pull rod 1.

[0074] Since the diameter of the second hole 13 is not large, the diameter of the second punching needle 55 is small. In order to prevent the second punching needle 55 from bending during the punching process due to insufficient rigidity of the second punching needle 55, in this embodiment, Fig. 9 and Fig.10 As shown, a second guide seat 58 extending upward is fixedly disposed on the top wall of the first push seat 53 , wherein the second punch needle 55 passes through the second guide seat 58 and extends downward, and the outer wall of the second punch needle 55 abuts against the inner wall of the second guide seat 58 .

[0075] Through the above arrangement, in order to complete the A4 step of the pull rod 1, the second hole 13 is formed and the bending of the end of the pull rod 1 is completed, such as Figure 1 As shown, at this time, the third upper mold 54 is located above the third lower mold 51, and a gap is left between the bottom wall of the first push seat 53 and the top wall of the second filling block 522 for the insertion of the pull rod 1. At this time, the pull rod 1 is sleeved on the second filling block 522, and the side wall of the first notch 10 is abutted against the front wall of the lifting seat 521, and the end of the pull rod 1 is abutted against the vertical side wall of the bending notch 561; then the third upper mold 54 is moved downward, thereby driving the first push seat 53, the second punch 55 and the bending seat 56 to move downward. When the bottom wall of the first push seat 53 abuts against the top wall of the first limiting column 511, as shown in FIG. Fig.11 As shown, the first push seat 53 stops moving downward. At this time, the first guide column 531 is inserted into the first guide hole 514, and the top wall of the bending notch 561 abuts against the top wall of the pull rod 1. The first guide column 531 cooperates with the first guide hole 514 to improve the stability of the third upper mold 54 moving downward. Then the third upper mold 54 continues to move downward. At this time, the spring 57 is compressed, and the bending seat 56 and the second punch 55 continue to move downward to start punching and bending the pull rod 1. Fig.12 As shown, at this time, the second punching needle 55 is inserted into the punching cavity 5221, and the bottom wall of the third upper mold 54 abuts against the top wall of the third guide seat 59, limiting the third upper mold 54 from continuing to move downward.

[0076] The third lower mold 51 is further provided with an inserting groove 512 located entirely below the bending seat 56 . When the second punching needle 55 is inserted into the punching cavity 5221 , the bottom of the bending seat 56 is inserted into the inserting groove 512 .

[0077] The first punching die set 3 , the second punching die set 4 and the third punching die set 5 are used to replace the laser cutting equipment, thereby reducing the technical requirements for forming the tie rod 1 and improving the efficiency of forming the tie rod 1 .

[0078] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A tie rod forming tool, characterized in that: The invention comprises a workbench (2), on which is provided a first punching die set (3) for punching out a first notch (10) and a bending groove (12) on a pull rod (1), a second punching die set (4) for punching out a first hole (11) on the pull rod (1), and a third punching die set (5) for punching out a second hole (13) on the pull rod (1) and bending the end of the pull rod (1), the second punching die set (4) comprising a second lower die (44) and a first punching needle (451) movable up and down relative to the second lower die (44), the second lower die (44 ) is provided with an insertion slot (441) for inserting the pull rod (1), a first filling block (43) is fixedly provided in the insertion slot (441), a gap for inserting the pull rod (1) is reserved between the outer wall of the first filling block (43) and the inner wall of the insertion slot (441), a punching hole (431) is provided on the first filling block (43) for inserting the first punching needle (451), and a third discharge port (443) aligned with the punching hole (431) is provided on the bottom wall of the second lower mold (44), and the aperture of the third discharge port (443) is larger than the aperture of the punching hole (431).

2. A tie rod forming tool according to claim 1, characterized in that: The punching hole (431) further comprises a first bell mouth (4311) opening downward, wherein a small diameter end of the first bell mouth (4311) is connected to the punching hole (431), and a large diameter end of the first bell mouth (4311) is connected to the bottom wall of the first filling block (43).

3. A tie rod forming tool according to claim 2, characterized in that: The third discharge port (443) comprises a second bell mouth (4431), a small diameter end of the second bell mouth (4431) is connected to the third discharge port (443), and a large diameter end of the second bell mouth (4431) is connected to the bottom wall of the insertion slot (441).

4. The tie rod forming tool according to claim 1, characterized in that: A limiting seat (42) aligned with the inserting slot (441) is also installed on the workbench (2). When the pull rod (1) punches the first hole (11), the pull rod (1) is inserted into the inserting slot (441) and the end wall of the pull rod (1) abuts against the limiting seat (42).

5. The tie rod forming tool according to claim 1, characterized in that: The first stamping die set (3) comprises a first lower die (31) and a first upper die (32); the first lower die (31) is provided with a first stamping groove (311) which is recessed downward and passes through the front and rear walls of the first lower die (31); the bottom wall of the first lower die (31) is also provided with a connecting groove (313) which is connected with the first stamping groove (311); the side wall of the first upper die (32) is connected with the inner wall of the connecting groove (313) in a longitudinal sliding manner; the bottom wall of the first lower die (31) is provided with a first discharge port (3111) which is connected with the first stamping groove (311); the side wall of the first upper die (32) is fixedly provided with a first stamping block (322) which extends into the first stamping groove (311); when the first notch (10) is stamped, the first stamping block (322) is filled into the inner cavity of the pull rod (1).

6. A tie rod forming tool according to claim 5, characterized in that: The bottom wall of the first lower mold (31) is provided with a second punching groove (312) which is recessed downward and connected to the connecting groove (313); the front wall of the first lower mold (31) is provided with an insertion port (314) which is connected to the second punching groove (312); the bottom wall of the first lower mold (31) is provided with a second discharge port (3121) which is connected to the second punching groove (312); the first upper mold (32) is provided with a second punching block (3231) which extends to the second punching groove (312); the second punching block (3231) is provided with a bending punching block (3232) for punching out a bending groove (12); when the bending groove (12) is punched, the bending punching block (3232) and the second punching block (3231) are filled in the inner cavity of the pull rod (1).

7. A tie rod forming tool according to claim 6, characterized in that: A magnet (33) is fixedly provided on the top wall of the first lower mold (31).

8. The tie rod forming tool according to claim 1, characterized in that: The third stamping die set (5) comprises a third lower die (51) and a third upper die (54); the third lower die (51) is fixedly provided with a lifting seat (521) extending upward, and the lifting seat (521) is provided with a second filling block (522) for filling the inner cavity of the pull rod (1); the third upper die (54) is fixedly provided with a bending seat (56) extending downward and a second punch needle (55); the second filling block (522) is provided with a punching cavity (5221) for inserting the second punch needle (55); when the pull rod (1) is bent, the bending groove (12) of the pull rod (1) extends out of the second filling block (522); the side wall of the bending seat (56) is offset from the side wall of the second filling block (522), and the bottom wall of the bending seat (56) is located directly above the bending groove (12).

9. A tie rod forming tool according to claim 8, characterized in that: The third punching die assembly (5) also includes a first push seat (53) located below the third upper mold (54), a spring (57) is provided between the top wall of the first push seat (53) and the bottom wall of the third upper mold (54), a third guide seat (59) extending upward is fixedly provided on the top wall of the first push seat (53), a gap is provided between the top wall of the third guide seat (59) and the bottom wall of the third upper mold (54) for the third upper mold (54) to press downward, and a bending seat (56) and a second punch needle (55) extend downward through the first push seat (53).

10. A tie rod forming tool according to claim 9, characterized in that: A first limiting column (511) extending upward is fixedly provided on the top wall of the third lower mold (51), wherein the top wall of the first limiting column (511) is higher than the top wall of the second filling block (522), and the difference between the top wall of the first limiting column (511) and the top wall of the second filling block (522) is greater than the wall thickness of the pull rod (1).

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