A continuous punching device and punching method for a fence gate hinge

Abstract

This invention relates to the field of stamping equipment and provides a continuous stamping device for fence gate hinges, including an upper die base and a lower die base, with a processing area through which a feed strip passes between the upper and lower die bases. The device further includes: a punching device disposed on the upper die base for punching the feed strip; a bending device disposed along the length of the processing area for bending the feed strip to form a hinge mounting post; the punching and bending devices are arranged in two staggered rows along the width of the feed strip; and a blanking device disposed on the lower die base for removing punched waste from the processing area. A continuous stamping method for fence gate hinges using the above-described stamping device is also provided. This invention can effectively improve the production efficiency of hinge workpieces.

Description

Technical Field

[0001] This invention relates to the field of stamping equipment technology, and more specifically, to a continuous stamping device and stamping method for a gate hinge. Background Technology

[0002] The content in this section only provides background information related to this invention and may not constitute prior art.

[0003] As the connecting hub between the gate and the post, the hinge of the fence gate needs to be bent at the end to form a cylindrical mounting part to ensure smooth rotation. The processing accuracy directly affects the smoothness of the gate opening and closing and its service life. With the continuous growth of demand for hinges in the fence gate market, the traditional single-piece intermittent stamping mode has become a significant constraint on capacity expansion due to its long cycle time and low efficiency. Therefore, developing continuous and automated stamping equipment to improve manufacturing efficiency is a key requirement for manufacturers.

[0004] Existing gate hinge stamping equipment includes multi-station continuous modules arranged sequentially along the feeding direction. Each station completes the blanking, pre-bending, and rolling forming of the cylindrical mounting part. In actual use, the material strip precision stepping feeding mechanism passes through each station one by one. The die produces one finished hinge workpiece after each stroke. However, due to the inherent structural constraint that each forming station inside the continuous die must be arranged in series along the longitudinal direction of a single material strip, a single stamping can only act on the forming process of one workpiece. As a result, the output per unit time is directly linked to the working frequency of the punch press, resulting in low production efficiency. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the purpose of this invention is to provide a continuous stamping device and stamping method for gate hinges, which can effectively improve the production efficiency of hinge workpieces.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] On one hand, the present invention provides a continuous stamping device for a gate hinge.

[0008] A continuous stamping device for a gate hinge includes an upper die base and a lower die base, with a processing area through which a feed strip passes between the upper and lower die bases. The device further includes: a punching device disposed on the upper die base for punching the feed strip; a bending device disposed along the length of the processing area for bending the feed strip to form a hinge mounting post; the punching and bending devices are arranged in two staggered rows along the width of the feed strip; and a blanking device disposed on the lower die base for removing punched waste from the processing area.

[0009] In some possible embodiments, a first upper pad, a second upper pad, and a third upper pad are sequentially arranged on the upper die holder along the length direction of the processing area; the punching device includes: a first punching assembly, which is disposed on the first upper pad and is used for trimming and punching the strip; and a second punching assembly, which is disposed on the third upper pad and is used for cutting the strip.

[0010] In some possible embodiments, the bending device includes a first bending assembly, a second bending assembly, and a third bending assembly arranged sequentially along the length of the processing area; the first bending assembly is disposed on a second upper pad and is used to pre-bend the strip at an inclination to form an upwardly inclined warped portion on the strip; the second bending assembly is disposed on a second upper pad and is used to bend the warped portion vertically to shape the warped portion into a vertical portion; the third bending assembly is disposed on a third upper pad and is located between the second bending assembly and the second punching assembly, and is used to roll the warped portion into a circle.

[0011] In some possible embodiments, the first bending assembly includes a first bending punch and a first bending insert. The first bending punch is disposed on a second upper pad, and the first bending insert is disposed below the first bending punch. A first bending groove is formed at the bottom of the first bending punch, and a first bending protrusion is formed at the top of the first bending insert. The inner wall of the first bending groove is provided with a rounded corner recess, and a corresponding rounded corner protrusion is provided on the first bending protrusion.

[0012] In some possible embodiments, the second bending assembly includes a second bending punch, a second bending insert, and a second bending float. The second bending punch is disposed on a second upper pad, the second bending insert is disposed on a lower die base, and the second bending float is slidably disposed vertically on the side wall of the second bending insert near the strip. The second bending float is disposed below the second bending punch, and an elastic element is disposed on the second bending insert. The elastic element acts on the second bending float to make the top of the second bending float flush with the top of the second bending insert, and a second bending groove is formed between the second bending insert and the second bending float.

[0013] In some possible embodiments, the third bending assembly includes a third bending punch and a third bending insert. The third bending punch is disposed on a third upper pad, and the third bending insert is disposed below the third bending punch. A third bending groove is formed at the bottom of the third bending punch, and a fourth bending groove is formed at the top of the third bending insert. The third bending groove and the fourth bending groove are engaged to form a cylinder. A pressure block is provided vertically on the side of the third bending groove near the material strip, and the connection between the pressure block and the third bending groove is provided with a rounded corner that abuts against the material strip.

[0014] In some possible embodiments, both the first bending insert and the third bending insert have a receiving cavity in the vertical direction. A bending float is disposed in the receiving cavity, and an elastic element is disposed in the receiving cavity. The elastic element acts on the bending float so that the top of the bending float is flush with the top of the bending insert, and the top of the bending float is used to abut against the bottom of the material strip.

[0015] In some possible embodiments, the first punching assembly includes a punching module and a trimming module, a first irregular punch is provided on the first upper pad, the punching module and the trimming module are disposed in the first irregular punch, a second irregular punch is provided on the third upper pad, and the second punching assembly is disposed in the second irregular punch.

[0016] In some possible embodiments, a lower template is provided on the lower mold base, and a limiting component is provided on the lower template to limit the position of the strip on the lower template.

[0017] On the other hand, the present invention also provides a method for continuous stamping of a gate hinge.

[0018] A continuous stamping method for a fence gate hinge, characterized by employing a continuous stamping device as described in any one of claims 1-9, comprising the following steps:

[0019] S1. Step feeding: The material belt is conveyed step by step along the length of the processing area. The areas of the workpieces to be formed are arranged in two staggered rows along the width of the material belt.

[0020] S2, First punching: The first punching assembly trims and punches the strip to form the outer contour, internal hole and horizontal extension of the workpiece on the strip, while retaining the connection between two adjacent workpieces.

[0021] S3, bending: the strip passes through the first bending assembly to pre-bend the horizontal extension into an upwardly inclined warped part, the second bending assembly bends the warped part into a vertical part, and the third bending assembly rolls the vertical part into a cylindrical mounting part.

[0022] S4, Second punching: The second punching assembly punches the connecting part between two adjacent workpieces, so that the two finished hinges are simultaneously separated from the material strip and dropped.

[0023] In this process, the upper die holder synchronously drives the first blanking component, the first bending component, the second bending component, the third bending component, and the second blanking component to complete the corresponding steps for the two workpiece areas in a single stroke.

[0024] In summary, the technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0025] 1. By arranging the punching device and the bending device in two staggered rows along the width of the strip, two hinge workpieces can be punched and bent simultaneously in a single stroke. Compared with the existing continuous die that produces only one piece at a time, this staggered double-row arrangement structure doubles the output per unit time without increasing the punching frequency and die length, significantly improving the continuous stamping production efficiency of gate hinges.

[0026] 2. By using a first bending assembly, a second bending assembly, and a third bending assembly arranged sequentially along the feeding direction, the forming of the cylindrical mounting part is decomposed into three progressive steps: pre-bending and tilting, bending and straightening, and rolling. This effectively reduces the amount of material deformation in a single forming process, avoids edge cracking and excessive springback caused by directly pressing and rolling flat blanks, and ensures that the roundness and coaxiality of the cylindrical mounting part meet the hinge assembly accuracy requirements.

[0027] 3. Vertically floating bending blocks are set in the second and third bending components. In the free state, the top surface of the floating block is flush with the lower template to stably support the material strip. During stamping, the floating block is pressed down and exposes the bending groove for the material to be rolled into a circle. This not only ensures the horizontal support stability of the material strip during continuous feeding, but also provides the necessary downward clearance space for upward bending, effectively preventing feeding jamming and workpiece scratches.

[0028] 4. The first punching assembly is set on the first upper pad, the first and second bending assemblies are set on the second upper pad, and the third bending assembly and the second punching assembly are set on the third upper pad. This realizes the continuous integration of punching, three-step bending and separation blanking processes in the same mold, reduces the multiple clamping and turnover links of workpieces between different equipment, reduces the intensity of manual operation, and improves the consistency and automation level of the processing process. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the upper mold base according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the lower mold base according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the first upper clamping plate according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the second upper clamping plate according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the third upper clamping plate according to an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the first lower template according to an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of the second lower template according to an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the third lower template in an embodiment of the present invention;

[0038] Figure 10 This is a schematic diagram of the structure of the first bending assembly according to an embodiment of the present invention;

[0039] Figure 11 This is a schematic diagram of the structure of the second bending assembly according to an embodiment of the present invention;

[0040] Figure 12 This is a schematic diagram of the structure of the second bending float in an embodiment of the present invention;

[0041] Figure 13 This is a schematic diagram of the structure of the third bending component according to an embodiment of the present invention.

[0042] Icons: 1. Upper die base; 11. First upper pad; 12. Second upper pad; 13. Third upper pad; 14. First upper clamping plate; 15. Second upper clamping plate; 16. Third upper clamping plate; 17. First upper ejector plate; 18. Second upper ejector plate; 19. Third upper ejector plate; 120. Stop plate; 2. Lower die base; 24. First lower template; 25. Second lower template; 26. Third lower template; 27. Lower pad; 28. Lower support plate; 3. Processing area; 4. Punching device; 41. First punching assembly; 411. Punching module; 412. Trimming module; 413. First irregular punch; 42. Second punching assembly; 42 1. Second irregular punch; 5. Bending device; 51. First bending assembly; 511. First bending punch; 512. First bending insert; 513. First bending groove; 514. First bending protrusion; 515. Rounded corner recess; 516. Rounded corner protrusion; 52. Second bending assembly; 521. Second bending punch; 522. Second bending insert; 523. Second bending float; 524. Second bending groove; 53. Third bending assembly; 531. Third bending punch; 532. Third bending insert; 533. Third bending groove; 534. Fourth bending groove; 535. Pressing block; 6. Unloading device. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] The following is for reference Figures 1 to 13 The present invention will be described in further detail below.

[0045] On one hand, the present invention provides a continuous stamping device for a gate hinge.

[0046] Reference Figure 1 A continuous stamping device for a gate hinge includes an upper die base 1 and a lower die base 2, with a processing area 3 through which a feed belt passes between the upper die base 1 and the lower die base 2, and also includes a punching device 4, a bending device 5 and a blanking device 6.

[0047] The punching device 4 is located on the upper die base 1 and is used to punch the strip. The bending device 5 is located in the processing area 3 along the length of the processing area 3 and is used to bend the strip to form a hinge mounting post. The punching device 4 and the blanking device 6 are arranged in two staggered rows in the width direction of the strip. The blanking device 6 is located on the lower die base 2 and is used to allow the punching waste to leave the processing area 3.

[0048] By arranging the punching device 4 and the bending device 5 in two staggered rows along the width of the strip, the upper die holder 1 can simultaneously punch and bend the two workpiece areas in a single stroke. This achieves a continuous operation mode that produces two hinge semi-finished or finished products in a single stamping without increasing the operating frequency of the stamping equipment or the overall length of the die, significantly improving the production efficiency per unit time.

[0049] The punching device 4 and bending device 5 are arranged in sections along the length of the processing area 3. Each station is arranged in sequence according to the process order of punching, pre-bending, rolling and separating. The strip gradually completes all forming processes during the step feeding process, which effectively reduces the number of times the workpiece is turned over between different equipment, reduces the intensity of manual operation, and ensures the consistency and stability of the relative positional accuracy between each process.

[0050] Reference Figure 1 and Figure 2 The upper mold base 1 is provided with a first upper pad 11, a second upper pad 12 and a third upper pad 13 in sequence along the length of the processing area 3.

[0051] Reference Figure 1 As a continuous stamping and bending die, it is arranged from top to bottom as follows: upper die base 1, upper pad plate, upper clamping plate, stop plate 120, upper stripper plate, lower die plate, lower pad plate 27, lower die base 2, and lower support plate 28. In actual use, the strip is placed between the upper stripper plate and the lower die plate.

[0052] As one embodiment of the present invention, refer to Figure 1 The mold is divided into an upper mold part and a lower mold part. The upper mold base 1 is the plate-shaped part at the top of the upper mold part. In actual use, it is attached to the press slide and fixed to support the entire upper mold part, while also playing a supporting and guiding role.

[0053] Reference Figure 1 and Figure 2 The upper mold base 1 has screw through holes, usually countersunk holes, into which screws are recessed, passing through the screw through holes in the upper backing plate, and finally locking with the tapping holes in the upper clamping plate, thus securing the upper mold base 1, upper backing plate, and upper clamping plate together. The upper mold base 1 also has pin holes, aligned with the pin holes in the upper backing plate and upper clamping plate, for inserting locating pins. Furthermore, the upper mold base 1 has guide post clearance holes, providing clearance space for the tops of the inner or outer guide posts to prevent interference between the guide posts and the upper mold base 1 during mold closing. The upper mold base 1 also has wire-threading holes for wire EDM. Additionally, the upper mold base 1 has sleeve head through holes, aligned with the sleeve head through holes in the upper backing plate during actual use, for accommodating sleeve heads. Finally, the upper mold base 1 has nitrogen spring holes, aligned with the nitrogen spring holes in the upper backing plate and upper clamping plate, for accommodating nitrogen springs.

[0054] Reference Figure 1 The upper pad is located between the upper clamping plate and the upper die holder 1. Its core function is to withstand the reverse impact force of the punch during the stamping process and prevent the upper die holder 1, which has low hardness, from being dented by the punch.

[0055] Reference Figure 1 and Figure 2 The upper backing plate has screw through holes through which screws pass but are not tapped. These holes mate with the countersunk holes of the upper mold base 1 and the tapped holes of the upper clamping plate to lock the three layers of sheet metal. The upper backing plate also has pin holes for inserting locating pins, which align with the pin holes on the upper mold base 1 and the upper clamping plate to ensure the relative positional accuracy of the multilayer board. The upper backing plate also has wire-threading holes for inserting molybdenum wire during wire EDM. A sleeve head through-hole is also provided on the upper backing plate as a receiving hole for the sleeve head, typically countersunk or through-hole, allowing the sleeve head to be recessed into the board without protruding from the board surface, ensuring a smooth fit between adjacent boards. Finally, a nitrogen spring hole is provided on the upper backing plate, corresponding to the nitrogen spring holes on the upper clamping plate, providing space for the nitrogen spring.

[0056] In actual use, the upper pad plate bears the impact force transmitted from the tail of the punch and distributes it to the upper die base 1. The punch holder sits on the bottom surface of the upper pad plate or sinks into the upper die base 1 through the upper pad plate. As one embodiment of the present invention, the punch holder is directly installed on the bottom surface of the upper pad plate.

[0057] Reference Figure 1 and Figure 2 The upper pad is provided with a first upper pad 11, a second upper pad 12 and a third upper pad 13. In actual use, the screw through hole, pin hole, thread hole, sleeve head through hole and nitrogen spring hole are the same or similar, and their functions are also the same or similar.

[0058] Reference Figure 1 The upper clamping plate is used to clamp and fix various punches, guide pillars and other parts. The upper clamping plate is provided with pin holes, which are used to cooperate with the corresponding holes of the upper pad plate and the upper mold base 1 to insert the mold closing pin. This ensures the positional accuracy between the multi-layer plates during the stamping process and prevents misalignment caused by screw tightening.

[0059] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6The upper clamping plate is provided with guide post holes, and an inner guide post is installed inside, corresponding to the guide post holes of the upper pad plate and the upper mold base 1, to achieve precise positioning between the layers and to guide the lower mold guide sleeve during mold closing. The upper clamping plate is provided with punch fixing holes, the hole shape of which matches the punch shank, and the punch is locked to the upper clamping plate by a mounting plate or screws. The upper clamping plate is provided with irregularly shaped punch holes for fixing irregularly shaped punches; the hole shape is adapted to the punch mounting part. In actual use, wire cutting is used to ensure accuracy. After the punch passes through the upper clamping plate, the shank is limited by the stop plate 120 or the upper pad plate. Punch insert holes are provided for fixing... The fixed punch insert makes the easily damaged or high-precision punching edge part into an insert, thereby facilitating replacement and maintenance. A mounting plate clearance hole is provided on the upper clamping plate, serving as a clearance hole for the punch mounting plate, allowing the mounting plate to sink into the plate and ensuring flat force distribution on the back of the punch. A sleeve through hole is provided on the upper clamping plate, serving as a through hole for equal-height sleeves or plug screws; the sleeve is used to limit the travel of the stripper plate. A nitrogen spring hole is provided on the upper clamping plate for installing a nitrogen spring. The nitrogen spring provides stable unloading or pressing force, replacing traditional springs under high pressure, improving service life and rebound accuracy.

[0060] Refer to Figure 4 , Figure 5 and Figure 6 The upper clamping plates are correspondingly provided with a first upper clamping plate 14, a second upper clamping plate 15, and a third upper clamping plate 16. In actual use, the pin holes, guide post holes, sleeve through holes, nitrogen spring holes, etc., are all the same or similar, and their functions are also the same or similar. Since this invention adopts a continuous stamping and bending forming method, the processing method for the strip material is different at different processing stations. Therefore, the irregular punches on the first upper clamping plate 14, the second upper clamping plate 15, and the third upper clamping plate 16 are somewhat different. The main purpose is to perform different punching or bending operations on the strip material at different processing stations. In actual use, the first upper clamping plate 14, the second upper clamping plate 15, and the third upper clamping plate 16 correspond to the punches and inserts in their respective work station areas, forming independent stamping units on the corresponding upper pads, namely the first upper pad 11, the second upper pad 12, and the third upper pad 13, and the corresponding work stations on the lower template.

[0061] Reference Figure 1The upper stripper plate is located below the stop plate 120 and is also called the stripper plate or stripper plate. It is used to remove the strip from the punch when the mold is opened, and to press the strip to prevent it from warping when the mold is closed. It also plays a certain guiding and protective role for the punch. The upper stripper plate has screw holes for screws to be driven in from below or the side, used to fix parts such as the guide plate and stripper blade. It also has pin holes aligned with the pin holes on the stop plate 120 to position the stripper plate relative to the stop plate 120. Furthermore, it has guide sleeve holes for installing guide sleeves, which cooperate with the inner guide pillars to precisely guide the stripper plate during its up-and-down movement. A guide pin hole is also provided for installing guide pins, which are inserted into the guide holes on the strip during mold closing to precisely position the strip to the correct position, ensuring the accuracy of the step-feed. The upper stripper plate has irregularly shaped punch holes for the punch to pass through; the hole shape matches the punch's shape, ensuring smooth punch passage and guiding its movement. Finally, it has guide plate clearance holes to provide clearance space for the lower die guide plate during actual stamping, preventing interference during mold closing.

[0062] Reference Figure 1 Corresponding to the first upper clamping plate 14, the second upper clamping plate 15 and the third upper clamping plate 16, there are also three upper release plates, namely the first upper release plate 17, the second upper release plate 18 and the third upper release plate 19.

[0063] Reference Figure 1 The stop plate 120 is located between the upper clamping plate and the upper release plate. Its core function is to lock the guide pin and the upper release plate insert, and to serve as the back plate of the upper release plate, padding the upper release plate insert and screws to prevent the insert and screws from pressing upward and damaging the upper clamping plate. In actual use, the stop plate 120 has several holes, including threaded holes, pin holes, guide sleeve holes, sleeve through holes, and threading holes, which respectively cooperate with the corresponding holes on the upper clamping plate and the upper release plate. These holes are used to fix the guide pin, install the guide sleeve, pass through the sleeve, and be positioned by the pin. The nitrogen spring hole is aligned with the nitrogen spring hole on the upper clamping plate to accommodate the nitrogen spring. In addition, the stop plate 120 is connected to the upper release plate through the sleeve and moves up and down with the upper release plate. On the other hand, it is precisely aligned with the upper clamping plate through the pin, while providing support for the upper release plate insert and screws.

[0064] Reference Figure 1 The lower die base 2 is provided with a lower template, which is an important working main board in the continuous die. It is used to fix the die cutting edge block, bending die, floating material block and guide plate and other components, and cooperate with the upper die punch to complete forming actions such as punching and bending.

[0065] Reference Figure 1 , Figure 7 , Figure 8 , Figure 9 The lower die plate has a cutting edge entry hole for installing the die cutting edge entry block, which corresponds to the upper die punch. After punching, the punch enters the cutting edge to complete the cutting. The lower die plate has a floating material pin hole for installing the floating guide pin, which lifts the strip for easy feeding and also serves as a lateral guide. The lower die plate has a guide plate hole for fixing the guide plate to constrain the lateral position of the strip and ensure the stability of the feeding trajectory. The lower die plate has a lower die guide sleeve hole for installing the guide sleeve, which cooperates with the inner guide post of the upper die for guidance. The lower die plate has a scrap through hole, i.e., a discharge hole, which serves as a through hole for the punching scrap to fall.

[0066] In one embodiment of the present invention, the lower template and the upper pad are arranged in a one-to-one correspondence, and a first lower template 24, a second lower template 25 and a third lower template 26 are respectively arranged along the processing area 3.

[0067] Reference Figure 1 A lower backing plate 27 is provided between the lower template and the lower mold base 2. The function of the lower backing plate 27 is similar to that of the upper backing plate. Its function is to support the cutting edge block and the forming insert, and to transmit the punching force to the lower mold base 2, preventing the lower mold base 2 from being dented by the die block. At the same time, it can also increase the strength of the lower template to a certain extent. The lower backing plate 27 is provided with a through hole for the cutting edge block, a through hole for the scrap material, a through hole for the floating material pin, a pin hole, and a screw through hole. The above holes are respectively matched with the corresponding holes of the lower template and the lower mold base 2.

[0068] Reference Figure 1 and Figure 3 The lower die holder 2 is an important component of the lower die part. It is fixed to the press worktable, bears the weight and punching force of the entire lower die part, and achieves coarse guidance between the upper and lower dies through the outer guide post and the upper die holder 1.

[0069] The holes on the lower die holder 2 mainly include screw through holes, where screws are sunk from the back and pass through the tapping holes of the lower die plate 27 to lock in place; pin holes, which are aligned and positioned with the lower die plate 27 and the lower die plate; guide post holes, for installing the outer and inner guide posts; and scrap through holes, for passing through punching scrap.

[0070] Reference Figure 1 A lower support plate 28 is provided at the bottom of the lower mold part. The lower support plate 28 is located below the lower mold base 2. Its main function is to facilitate the clamping between the mold and the press worktable, increase the contact area between the mold and the press worktable, and facilitate installation.

[0071] Reference Figure 1 and Figure 4The punching device 4 includes a first punching component 41 and a second punching component 42. The first punching component 41 is disposed on the first upper pad 11 and is used for trimming and punching the strip. The second punching component 42 is disposed on the third upper pad 13 and is used for cutting the strip.

[0072] As one embodiment of the present invention, refer to Figure 4 The first punching assembly 41 includes a punching module 411 and a trimming module 412. A first irregular punch 413 is provided on the first upper pad 11. The punching module 411 and the trimming module 412 are disposed in the first irregular punch 413. A second irregular punch 421 is provided on the third upper pad 13. The second punching assembly 42 is disposed in the second irregular punch 421.

[0073] In practical use, the trimming module 412 performs punching and trimming at both ends of the strip. This serves two purposes: firstly, it positions the strip during punching to ensure its stepping accuracy; secondly, it performs preliminary punching. The trimming module 412 is typically a standard workpiece. In actual use, different sizes of trimming punches and inserts are selected based on the width and thickness of the strip. The punching module 411 is typically a custom workpiece. Different shapes of punching modules 411 are customized based on the shape of different hinges and the internal through-hole patterns. As one embodiment of the invention, the shape of the punching module 411 is as follows: Figure 4 As shown, when other types of hinges need to be produced, different custom die-cutting modules 411 need to be replaced.

[0074] The first punching component 41 punches and trims the material strip simultaneously on both sides through the trimming module 412, which not only removes the excess material strip edge, but also forms a precise positioning reference on the material strip, ensuring the consistency of position during subsequent step feeding at each station, thereby improving the overall stamping accuracy.

[0075] The blanking module 411 adopts a modular custom structure, which can be flexibly changed according to the contour and hole shape of different hinge products, giving the mold good process adaptability and convenient changeover. The second blanking component 42 is arranged after the bending process and is specifically used to blank the connection between adjacent workpieces, so that the finished hinge can be separated and blanked at one time after all forming processes are completed, avoiding positioning inaccuracy or deformation caused by separation in the middle. The blanking process is divided into two parts: the front trimming and punching and the rear separation and cutting, which are respectively set on the first upper pad 11 and the third upper pad 13. This not only reasonably distributes the forming load of each station, but also makes the strip maintain stable connection strength throughout the processing, effectively preventing feeding deviation or warping caused by premature separation, and further ensuring the smoothness of the continuous stamping process and the consistency of the finished product.

[0076] Reference Figure 5 and Figure 6 The bending device 5 includes a first bending component 51, a second bending component 52 and a third bending component 53 arranged sequentially along the length of the processing area 3.

[0077] like Figure 5 and Figure 10 As shown, the first bending component 51 is disposed on the second upper pad 12. The first bending component 51 is used to pre-bend the strip to form an upwardly inclined warped portion on the strip.

[0078] like Figure 5 and Figure 11 As shown, the second bending component 52 is disposed on the second upper pad 12. The second bending component 52 is used to bend the warped portion vertically so that the warped portion is deformed into a vertical portion.

[0079] like Figure 6 and Figure 13 As shown, the third bending component 53 is disposed on the third upper pad 13. The third bending component 53 is located between the second bending component 52 and the second punching component 42. The third bending component 53 is used to roll the warped portion into a circle.

[0080] The forming process of the cylindrical mounting part is divided into three progressive steps: pre-bending, erecting, and rolling. This ensures that the material undergoes only limited plastic deformation during each stamping stroke, effectively reducing the concentration of tensile and compressive stress during a single bend. This avoids edge cracking and severe springback caused by directly pressing and rolling flat blanks.

[0081] The first bending assembly 51, through the engagement of the first bending punch 511 and the first bending insert 512, tilts the horizontal extension upward, forming an initial warping angle, providing a favorable deformation starting point for subsequent vertical bending; the second bending assembly 52, using the elastic floating support of the second bending float 523, smoothly transitions the strip to a vertical state when the punch presses down, and after forming, the float lifts the strip, ensuring smooth feeding; the third bending assembly 53 performs final winding and closing of the vertical part through the engagement of the upper and lower grooves, and uses the pressure block 535 and its rounded corner transition to prevent indentations or stress concentration at the end of the roll.

[0082] The step-by-step bending layout significantly reduces the forming load on each component, which helps to extend the service life of the mold. At the same time, the deformation between each step is more controllable, and the final cylindrical mounting part has good roundness consistency and high coaxiality, which fully meets the assembly precision requirements of the gate hinge.

[0083] Reference Figure 13In one embodiment of the present invention, the first bending assembly 51 includes a first bending punch 511 and a first bending insert 512. The first bending punch 511 is disposed on the second upper pad 12, and the first bending insert 512 is disposed below the first bending punch 511. A first bending groove 513 is provided at the bottom of the first bending punch 511, and a first bending protrusion 514 is provided at the top of the first bending insert 512. A rounded corner recess 515 is provided on the inner wall of the first bending groove 513, and a rounded corner protrusion 516 is correspondingly provided on the first bending protrusion 514.

[0084] The first bending assembly 51, through the rounded corner recess 515 on the inner wall of the first bending groove 513 and the rounded corner protrusion 516 on the first bending protrusion 514, applies a progressive bending guidance to the horizontal extension of the strip during the stamping process, so that the material smoothly transitions along the rounded arc surface and forms an upwardly inclined warped part, avoiding stress concentration and surface indentation caused by right-angle bending. The design of the rounded corner structure effectively reduces the deformation resistance of the material during the initial bending, reduces the punch load, and at the same time reserves a reasonable pre-bending angle for the subsequent vertical bending process of the second bending assembly 52, so that the material has a good deformation trend before entering the rolling forming, which is conducive to the roundness uniformity and dimensional stability of the final cylindrical mounting part.

[0085] Reference Figure 11 and Figure 12 In one embodiment of the present invention, the second bending assembly 52 includes a second bending punch 521, a second bending insert 522, and a second bending float 523. The second bending punch 521 is disposed on the second upper pad 12, the second bending insert 522 is disposed on the lower die base 2, and the second bending float 523 is slidably disposed on the side wall of the second bending insert 522 near the strip in the vertical direction. The second bending float 523 is disposed below the second bending punch 521. An elastic element is disposed on the second bending insert 522. The elastic element acts on the second bending float 523 so that the top of the second bending float 523 is flush with the top of the second bending insert 522. A second bending groove 524 is formed between the second bending insert 522 and the second bending float 523.

[0086] Reference Figure 13In one embodiment of the present invention, the third bending assembly 53 includes a third bending punch 531 and a third bending insert 532. The third bending punch 531 is disposed on the third upper pad 13, and the third bending insert 532 is disposed below the third bending punch 531. A third bending groove 533 is provided at the bottom of the third bending punch 531, and a fourth bending groove 534 is provided at the top of the third bending insert 532. The third bending groove 533 and the fourth bending groove 534 are fastened together to form a cylindrical shape. A pressure block 535 is provided vertically on the side of the third bending groove 533 near the material strip. A rounded corner is provided at the connection between the pressure block 535 and the third bending groove 533 to abut against the material strip.

[0087] In one embodiment of the present invention, both the first bending insert 512 and the third bending insert 532 are provided with a receiving cavity in the vertical direction. A bending float is provided in the receiving cavity, and an elastic element is provided in the receiving cavity. The elastic element acts on the bending float so that the top of the bending float is flush with the top of the bending insert, and the top of the bending float is used to abut against the bottom of the material strip.

[0088] Reference Figure 1 The lower mold base 2 is provided with a lower template, and a limit component is provided on the lower template. The limit component is used to limit the position of the strip on the lower template and is set as a guide post.

[0089] On the other hand, the present invention also provides a continuous stamping device for a gate hinge.

[0090] A continuous stamping method for a fence gate hinge, employing the continuous stamping device described above, includes the following steps:

[0091] S1, Step feeding, the material belt is conveyed step by step along the length of the processing area 3, and the areas of the workpieces to be formed are arranged in two staggered rows along the width of the material belt.

[0092] During the feeding process, the strip is lifted by the floating guide pin on the lower die and suspended above the surface of the lower die. The guide plate constrains the lateral offset of the strip, ensuring that the strip moves smoothly along the preset trajectory. Each feeding step is equal to the distance between the die station. When the upper die rises, one step is completed. The strip remains stationary between the upper and lower dies, waiting for the next stroke.

[0093] S2. First punching: The upper die holder 1 moves downward under the drive of the press slide, and the first punching assembly 41, mounted on the first upper pad 11, moves downward accordingly. The punch of the trimming module 412 first contacts the two edges of the strip, and with the cooperation of the corresponding die cutter, removes the excess material in the width direction of the strip to form a precise positioning edge. At the same time, the irregular punch of the punching module 411 punches the internal area of ​​the strip, processing the outer contour of the hinge workpiece, the internal decorative hole, and the horizontal extension for subsequent bending. In this step, the connection between two adjacent workpieces is completely preserved, so that the strip as a whole still maintains a continuous strip shape, which is convenient for continuous conveying in subsequent stations. The waste material generated by punching is removed from the processing area 3 through the blanking hole on the lower die.

[0094] S3. Bending: The strip is pre-bent by the first bending assembly 51 to form an upwardly inclined warped part, the warped part is bent into a vertical part by the second bending assembly 52, and the vertical part is rolled into a cylindrical mounting part by the third bending assembly 53.

[0095] After the strip is positioned at the first bending assembly 51 station, the upper die moves downward. The first bending groove 513 at the bottom of the first bending punch 511 engages with the first bending protrusion 514 at the top of the first bending insert 512. The rounded corner recess 515 on the inner wall of the first bending groove 513 cooperates with the rounded corner protrusion 516 on the first bending protrusion 514, forcing the horizontal extension to bend upward along the arc trajectory, forming a warped portion that is tilted upward at a predetermined angle relative to the strip plane. During this process, the bending float in the first bending insert 512 keeps its top surface flush with the insert under the support of the elastic element, providing stable support for the non-bending area of ​​the strip and preventing overall deformation.

[0096] The strip material advances to the second bending assembly 52 station. The upper die descends, and the second bending punch 521 applies downward pressure to the warped portion. Simultaneously, the second bending float 523, under the pressure of the strip material, overcomes the force of the elastic element and sinks vertically. The second bending groove 524 is exposed between the second bending insert 522 and the second bending float 523. Under the combined constraint of the punch and the groove, the warped portion is forced to bend to a vertical state, forming a vertical portion. After stamping, the upper die rises, and the second bending float 523 resets under the action of the elastic element, lifting the formed vertical portion to the same height as the lower die plate, ensuring the strip material advances smoothly.

[0097] The strip continues to advance to the third bending assembly 53 station. The upper die moves downward, and the third bending groove 533 at the bottom of the third bending punch 531 aligns with the fourth bending groove 534 at the top of the third bending insert 532. The vertical part is gradually wound under the guidance of the arc-shaped inner wall of the third bending groove 533. At the same time, the rounded corner on the pressure block 535 abuts against the root of the strip to prevent stress concentration or indentation at the beginning of the rolling. The bending float in the third bending insert 532 sinks during the stamping to make room for the rolling. After the stamping is completed, it bounces up to lift the finished cylindrical mounting part away from the cavity. The third bending groove 533 and the fourth bending groove 534 engage to form a complete cylindrical cavity, so that the vertical part is completely rolled and closed, forming the cylindrical mounting part required for the gate hinge.

[0098] S4. Second punching: The strip moves to the second punching assembly 42 station corresponding to the third upper pad 13. The upper die moves down, and the blanking punch in the second punching assembly 42 impacts the connection between two adjacent workpieces. The connection is cut off by the shearing action of the punch and the die cutting edge. The two hinge workpieces that have completed all forming processes are separated from the strip at the same time and fall into the finished product collection container. Thus, the complete manufacturing process of two hinges is completed in a single stroke.

[0099] In the entire stamping cycle from steps S1 to S4 above, the upper die holder 1 synchronously drives the first blanking component 41, the first bending component 51, the second bending component 52, the third bending component 53 and the second blanking component 42 in a single stroke, and simultaneously performs corresponding processing on the workpiece areas arranged in two staggered rows in the width direction of the strip. That is, when the upper die completes one reciprocating motion, the strip in the area of ​​the first upper pad 11 is trimmed and punched, the strip in the area of ​​the second upper pad 12 is pre-bent and tilted and bent vertically respectively, and the strip in the area of ​​the third upper pad 13 is simultaneously rolled and separated into finished products and dropped. Each station operates in parallel to achieve continuous production.

[0100] In this process, the upper die holder 1 synchronously drives the first punching component 41, the first bending component 51, the second bending component 52, the third bending component 53, and the second punching component 42 to complete the corresponding steps for the two workpiece areas in a single stroke.

[0101] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A continuous stamping device for a gate hinge, comprising an upper die base (1) and a lower die base (2), wherein a processing area (3) through which a feed belt passes is provided between the upper die base (1) and the lower die base (2), characterized in that, Also includes: Punching device (4), the punching device (4) is disposed on the upper die base (1), the punching device (4) is used to punch the strip material; A bending device (5) is provided in the processing area (3) along the length direction of the processing area (3). The bending device (5) is used to bend the strip to form a hinge mounting post. The punching device (4) and the bending device (5) are arranged in two staggered rows in the width direction of the strip; The blanking device (6) is located on the lower die base (2) and is used to allow the blanking waste to leave the processing area (3).

2. The continuous stamping device for a fence gate hinge according to claim 1, characterized in that, The upper mold base (1) is provided with a first upper pad (11), a second upper pad (12) and a third upper pad (13) in sequence along the length direction of the processing area (3). The punching device (4) includes: The first punching assembly (41) is disposed on the first upper pad (11) and is used for trimming and punching the strip. The second punching assembly (42) is disposed on the third upper pad (13) and is used to cut the strip.

3. The continuous stamping device for a fence gate hinge according to claim 2, characterized in that, The bending device (5) includes a first bending component (51), a second bending component (52) and a third bending component (53) arranged sequentially along the length of the processing area (3). The first bending assembly (51) is disposed on the second upper pad (12). The first bending assembly (51) is used to pre-bend the strip to form an upwardly inclined warped portion on the strip. The second bending assembly (52) is disposed on the second upper pad (12). The second bending assembly (52) is used to bend the warped portion vertically so that the warped portion is deformed into a vertical portion. The third bending assembly (53) is disposed on the third upper pad (13). The third bending assembly (53) is located between the second bending assembly (52) and the second punching assembly (42). The third bending assembly (53) is used to roll the warped portion into a circle.

4. The continuous stamping device for a fence gate hinge according to claim 3, characterized in that: The first bending assembly (51) includes a first bending punch (511) and a first bending insert (512). The first bending punch (511) is disposed on the second upper pad (12), and the first bending insert (512) is disposed below the first bending punch (511). The bottom of the first bending punch (511) is provided with a first bending groove (513), the top of the first bending insert (512) is provided with a first bending protrusion (514), the inner wall of the first bending groove (513) is provided with a rounded corner recess (515), and the first bending protrusion (514) is provided with a corresponding rounded corner protrusion (516).

5. The continuous stamping device for a fence gate hinge according to claim 3, characterized in that: The second bending assembly (52) includes a second bending punch (521), a second bending insert (522), and a second bending float (523). The second bending punch (521) is disposed on the second upper pad (12), the second bending insert (522) is disposed on the lower die base (2), and the second bending float (523) is slidably disposed on the side wall of the second bending insert (522) near the strip in the vertical direction. The second bending float (523) is disposed below the second bending punch (521). An elastic element is disposed on the second bending insert (522), and the elastic element acts on the second bending float (523) so that the top of the second bending float (523) is flush with the top of the second bending insert (522). A second bending groove (524) is formed between the second bending insert (522) and the second bending float (523).

6. The continuous stamping device for a fence gate hinge according to claim 4, characterized in that: The third bending assembly (53) includes a third bending punch (531) and a third bending insert (532). The third bending punch (531) is disposed on the third upper pad (13). The third bending insert (532) is disposed below the third bending punch (531). A third bending groove (533) is provided at the bottom of the third bending punch (531). A fourth bending groove (534) is provided at the top of the third bending insert (532). The third bending groove (533) and the fourth bending groove (534) are fastened together to form a cylinder. A pressure block (535) is provided vertically on the side of the third bending groove (533) near the material strip. A rounded corner is provided at the connection between the pressure block (535) and the third bending groove (533) to abut against the material strip.

7. The continuous stamping device for a fence gate hinge according to claim 6, characterized in that: Both the first bending insert (512) and the third bending insert (532) have a receiving cavity in the vertical direction. A bending float is provided in the receiving cavity, and an elastic element is provided in the receiving cavity. The elastic element acts on the bending float so that the top of the bending float is flush with the top of the bending insert. The top of the bending float is used to abut against the bottom of the material strip.

8. The continuous stamping device for a fence gate hinge according to claim 2, characterized in that: The first punching assembly (41) includes a punching module (411) and a trimming module (412). A first irregular punch (413) is provided on the first upper pad (11). The punching module (411) and the trimming module (412) are disposed in the first irregular punch (413). A second irregular punch (421) is provided on the third upper pad (13). The second punching assembly (42) is disposed in the second irregular punch (421).

9. A continuous stamping device for a fence gate hinge according to any one of claims 1-8, characterized in that: The lower mold base (2) is provided with a lower template, and the lower template is provided with a limiting component, which is used to limit the position of the strip on the lower template.

10. A continuous stamping method for a fence gate hinge, characterized in that, The continuous stamping apparatus according to any one of claims 1-9 includes the following steps: S1, step feeding, the material belt is conveyed step by step along the length direction of the processing area (3), and the areas of the workpieces to be formed are arranged in two staggered rows along the width direction on the material belt; S2, First punching, trimming and punching the strip through the first punching assembly (41) to form the outer contour, inner hole and horizontal extension of the workpiece on the strip, and retaining the connection between two adjacent workpieces. S3, bending: the strip passes through the first bending assembly (51) to pre-bend the horizontal extension into an upwardly inclined warped part, the second bending assembly (52) bends the warped part into a vertical part, and the third bending assembly (53) rolls the vertical part into a cylindrical mounting part. S4, Second punching, punching the connection between two adjacent workpieces through the second punching assembly (42), so that the two finished hinges are separated from the strip and dropped at the same time; Among them, the upper die holder (1) synchronously drives the first punching component (41), the first bending component (51), the second bending component (52), the third bending component (53) and the second punching component (42) to complete the corresponding steps for the two workpiece areas in a single stroke.

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