A bending machine for producing fireproof doors

Abstract

The utility model relates to fire door production technical field, concretely is a kind of bending machine for producing fire door, including base, the side of base upper end middle part is equipped with installation slot, the side fixed mounting of base lower end middle part is equipped with support, the both sides of support middle part are all fixed mounting and are equipped with jacking mechanism, the jacking mechanism includes sleeve, the upper side of sleeve middle part is equipped with upper guide slot, the lower side of sleeve middle part is equipped with wide body groove.The utility model is through the symmetrical linkage jacking mechanism of double gear and double roof of gear plate drive, pulls pull rod to drive both sides upper support rod synchronous jacking mould base, and the stable support of groove limiting is realized;Mould base uses four-point positioning of clamping plate and groove cooperation, without screw fixing, after jacking, mould base can be directly extracted and changed, without adjusting or disassembling bolt one by one, compared with traditional manual adjustment, screw fixed die changing mode, can significantly shorten mould base replacement time, adapt to the alternate processing demand of multiple-specification workpiece.

Description

Technical Field

[0001] This utility model relates to the field of fire door production technology, specifically a bending machine for producing fire doors. Background Technology

[0002] The bending machine for fire door production is a specialized piece of equipment used to bend metal sheets for fire doors, such as cold-rolled steel sheets and galvanized steel sheets. Its core function is to bend flat metal sheets into specific angles and shapes according to the structural requirements of fire doors, such as door frame edges, door leaf reinforcing ribs, and the area around the lock hole. It is a key piece of equipment in the sheet forming process of fire door production.

[0003] Traditional bending machines rely heavily on bolts to secure the bending die base, such as locking the die base to the worktable with multiple screws. However, this method has significant drawbacks when replacing the die base. Replacing the bending die base requires unscrewing multiple fixing bolts one by one before installing the new die base. During this process, the position of the die base needs to be repeatedly adjusted to align with the bending blade, and then the bolts need to be tightened one by one. If the bolts are not under uneven stress, they need to be readjusted. The entire die replacement process is time-consuming and has certain shortcomings. Utility Model Content

[0004] The purpose of this utility model is to provide a bending machine for producing fire doors, so as to solve the problems in the background art mentioned above.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A bending machine for producing fire doors includes a base. An installation groove is formed on one side of the upper middle portion of the base. A bracket is fixedly installed on one side of the lower middle portion of the base. Lifting mechanisms are fixedly installed on both sides of the middle portion of the bracket. Each lifting mechanism includes a sleeve. An upper guide groove is formed above the middle portion of the sleeve. A wide-body groove is formed below the middle portion of the sleeve. A lifting seat is rotatably installed in the middle of the wide-body groove. An upper support rod is fixedly installed at the upper end of the lifting seat. A gear is rotatably engaged at the lower end of the sleeve. A rotating shaft is fixedly installed at the upper end of the middle portion of the gear. Top plates are fixedly installed on both sides of the upper end of the rotating shaft. U-shaped grooves are formed on both sides of the middle portion of the lifting seat, and recesses are formed on the other two sides of the middle portion of the lifting seat.

[0006] In some embodiments, a fixing frame is fixedly installed above one end of the base, a hydraulic cylinder is fixedly installed in the middle of one end of the fixing frame, a bending knife is fixedly installed at the output end of the hydraulic cylinder, and guide rods are slidably engaged on both sides of the middle of one end of the fixing frame, with one end of each guide rod fixedly connected to both sides of the middle of the bending knife.

[0007] In some embodiments, slots are provided at both ends of the middle of the mounting groove, a bending die holder is engaged in the middle of the mounting groove, and the bending cutter is located directly above the bending die holder.

[0008] In some embodiments, two end plates are fixedly installed on both sides of the middle portion of the bending die base, and the clamping plates are slidably engaged with the middle portion of the corresponding slots.

[0009] In some embodiments, the upper support rod is slidably engaged with the middle part of the upper guide groove, the lifting seat is slidably engaged with the middle part of the wide body groove, and a spring is sleeved between the upper end of the lifting seat and the inner wall of the upper end of the wide body groove, the spring being sleeved on the outer side of the middle part of the upper support rod.

[0010] In some embodiments, the top plate and the U-shaped groove are slidably engaged, the top plate is snapped into the middle of the groove, a toothed plate is slidably snapped into one side of the lower end of the bracket, a pull rod is fixedly installed at one end of the toothed plate, the toothed plate meshes with two gears respectively, and one end of each of the two lifting mechanisms passes through the mounting groove and abuts against the lower end of the bending mold base.

[0011] This utility model has at least the following beneficial effects: 1. This utility model offers efficient and convenient replacement of bending die holders, significantly reducing changeover time. The device utilizes a symmetrical linkage lifting structure with double gears driven by a gear plate and double top plates. Pulling the pull rod drives the upper support rods on both sides to simultaneously lift the die holder, with grooved limiting for stable support. The die holder employs a four-point positioning system with a clamping plate and slot, eliminating the need for screw fixing. After lifting, the die holder can be directly replaced without adjusting or disassembling bolts individually. Compared to traditional manual adjustment and screw-fixed die replacement methods, this significantly shortens die holder replacement time and adapts to the need for alternating processing of multiple workpiece specifications.

[0012] 2. In use, during bending operations, the bending blade is driven by a hydraulic cylinder, and the guide rods on both sides form a double-track constraint, strictly limiting its movement in the vertical direction to avoid deviation. The bending die base is tightly engaged through a clamping plate and a clamping groove to firmly fix its horizontal and vertical positions, ensuring that it is always precisely aligned with the bending blade. The double precision constraint can effectively avoid dimensional deviations caused by bending blade tilting and die base displacement. It is especially suitable for bending thick fire door plates where there are high requirements for angle consistency and dimensional accuracy, ensuring stable workpiece forming quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the appearance and structure of this utility model; Figure 2 This is a schematic diagram showing the connection relationship between the bending die base and the mounting groove of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the base of this utility model; Figure 4 This is a schematic cross-sectional view of the lifting mechanism of this utility model; Figure 5 This is a schematic diagram showing the positional relationship between the rotating shaft and the lifting seat of this utility model.

[0014] In the diagram: 1. Base; 11. Fixing frame; 12. Hydraulic cylinder; 13. Bending knife; 14. Guide rod; 15. Mounting slot; 16. Slot; 17. Bending die holder; 18. Clamping plate; 2. Lifting mechanism; 20. Sleeve; 21. Upper guide groove; 22. Wide body groove; 23. Upper support rod; 24. Lifting seat; 25. Spring; 26. U-shaped groove; 27. Groove; 28. Rotating shaft; 29. ​​Top plate; 30. Gear; 31. Bracket; 32. Tooth plate; 33. Tie rod. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1: Please refer to Figure 1 - Figure 5 This utility model provides a technical solution: a bending machine for producing fire doors, including a base 1. An installation groove 15 is provided on one side of the upper middle portion of the base 1. A bracket 31 is fixedly installed on one side of the lower middle portion of the base 1. Lifting mechanisms 2 are fixedly installed on both sides of the middle portion of the bracket 31. The lifting mechanism 2 includes a sleeve 20. An upper guide groove 21 is provided above the middle portion of the sleeve 20. A wide-body groove 22 is provided below the middle portion of the sleeve 20. A lifting seat 24 is rotatably installed in the middle of the wide-body groove 22. An upper support rod 23 is fixedly installed at the upper end of the lifting seat 24. A gear 30 is rotatably engaged at the lower end of the sleeve 20. A rotating shaft 28 is fixedly installed at the upper end of the middle portion of the gear 30. Top plates 29 are fixedly installed on both sides of the upper end of the rotating shaft 28. U-shaped grooves 26 are provided on both sides of the middle part of the seat 24, and grooves 27 are provided on the other two sides of the middle part of the lifting seat 24. The upper support rod 23 is slidably engaged with the middle part of the upper guide groove 21, and the lifting seat 24 is slidably engaged with the middle part of the wide body groove 22. A spring 25 is sleeved between the upper end of the lifting seat 24 and the inner wall of the upper end of the wide body groove 22. The spring 25 is sleeved on the outer side of the middle part of the upper support rod 23. The top plate 29 and the U-shaped groove 26 are slidably engaged. The top plate 29 is engaged with the middle part of the groove 27. A toothed plate 32 is slidably engaged on one side of the lower end of the bracket 31. A pull rod 33 is fixedly installed on one end of the toothed plate 32. The toothed plate 32 meshes with two gears 30 respectively. One end of the two lifting mechanisms 2 passes through the mounting groove 15 and abuts against the lower end of the bending die seat 17 respectively.

[0017] In this embodiment, when the bending die holder 17 needs to be replaced, the toothed plate 32 can be slid by the pull rod 33. The toothed plate 32 meshes synchronously with the two gears 30, driving the two rotating shafts 28 and the top plate 29 to rotate synchronously. The top plate 29 pushes the lifting seat 24 to slide upward along the wide body groove 22 through the U-shaped groove 26, so that the upper support rods 23 on both sides synchronously lift the bending die holder 17, which is convenient for replacement. This symmetrical linkage design ensures that the lifting height of the two ends of the die holder is consistent. When the rotating shaft 28 rotates, the top plates 29 on both sides will also rotate synchronously. The U-shaped groove 26 opened in the top plate 29 and the lifting seat 24 slides and engages, and it will gradually drive the lifting along the direction of the U-shaped groove 26. The seat 24 and the upper support rod 23 move upward. When the top plate 29 is located in the middle of the grooves 27 on both sides of the lifting seat 24, the grooves 27 will limit it. At this time, the upper support rod 23 will reach its highest height. If it continues to rotate, the upper support rod 23 will gradually fall back. During this process, the spring 25 will be compressed and then reset. In the whole process, only the pull rod 33 needs to be pulled to drive the lifting mechanisms 2 on both sides synchronously through the toothed plate 32, which replaces the tedious operation of manual adjustment one by one in the traditional way and greatly shortens the mold seat replacement time. The meshing transmission between the gear 30 and the toothed plate 32 has self-locking property. After adjustment, no additional fixing is required, and the convenience of operation is significantly improved.

[0018] Example 2: As Figure 1 - Figure 3 As shown, a fixed frame 11 is fixedly installed on the upper part of one end of the base 1. A hydraulic cylinder 12 is fixedly installed in the middle of one end of the fixed frame 11. A bending blade 13 is fixedly installed at the output end of the hydraulic cylinder 12. Guide rods 14 are slidably engaged on both sides of the middle of one end of the fixed frame 11. One end of each guide rod 14 is fixedly connected to both sides of the middle of the bending blade 13. Slots 16 are opened at both ends of both sides of the middle of the mounting groove 15. A bending die base 17 is engaged in the middle of the mounting groove 15. The bending blade 13 is located directly above the bending die base 17. A clamping plate 18 is fixedly installed at both ends of both sides of the middle of the bending die base 17. The clamping plates 18 are slidably engaged in the middle of the corresponding clamping slots 16.

[0019] In this embodiment, when the hydraulic cylinder 12 drives the bending cutter 13 to move up and down, the guide rods 14 on both sides of the bending cutter 13 slide synchronously along the slide rail of the fixed frame 11, forming a double-track constraint, which can strictly limit the movement trajectory of the bending cutter 13 and ensure that it always moves in the vertical direction. The bending die base 17 slides and engages with the slots 16 of the mounting groove 15 through the clamping plates 18 on both sides, realizing four-point positioning and fixing, which can firmly limit the lateral and longitudinal displacement of the bending die base 17, ensuring that its relative position with the bending cutter 13 always corresponds accurately, avoiding bending dimension deviation caused by die base displacement. At the same time, this screwless installation and limiting method helps to quickly replace the bending die base 17.

[0020] Working principle: like Figure 1 - Figure 5 As shown, when it is necessary to replace the bending die holder 17, the operator can pull the lever 33 to drive the toothed plate 32 at the lower end of the bracket 31 to slide horizontally. Since the toothed plate 32 meshes synchronously with the gears 30 of the lifting mechanisms 2 on both sides, the sliding of the toothed plate 32 will drive the two gears 30 to rotate in the same direction, thereby driving the rotating shaft 28 at the upper end of the gear 30 and the top plates 29 on both sides of the rotating shaft 28 to rotate synchronously. During the rotation of the top plate 29, it first slides into the U-shaped groove 26 of the lifting seat 24, gradually pushing the lifting seat 24 upward along the wide groove 22 of the sleeve 20 along the inclined trajectory of the U-shaped groove 26. The upper support rod 23 at the upper end of the lifting seat 24 moves upward synchronously along the upper guide groove 21, finally lifting the bending die seat 17 in the mounting groove 15. The upper support rods 23 on both sides rise synchronously to ensure that the die seat is lifted horizontally and avoids tilting. When the rotating shaft 28 drives the top plate 29 to rotate to the groove 27 of the lifting seat 24, the top plate 29 will be locked into the groove 27. The groove 27 will limit the top plate 29. At this time, the upper support rod 23 reaches the maximum lifting height, and the bending die seat 17 is completely lifted, disengaging from the locking groove 16 of the mounting groove 15. At the same time, since the meshing of the gear 30 and the toothed plate 32 has self-locking properties, the lifting state can be stably maintained without additional fixing. The operator can then easily remove the old mold base and complete the disassembly.

[0021] Then, align the retaining plate 18 of the new bending die holder 17 with the retaining groove 16 of the mounting slot 15, and slide it into the designated position along the retaining groove 16. Pull the pull rod 33 in the opposite direction, the toothed plate 32 drives the gear 30 to rotate in the opposite direction, the top plate 29 disengages from the groove 27 and falls back along the U-shaped groove 26, combined with the lifting seat 24 moving down along the wide body groove 22 under the action of the previously compressed return spring force of the spring 25, the upper support rod 23 disengages from the bottom of the die holder, and the die holder can be pressed to the bottom by the user through the four-point positioning of the retaining plate 18 and the retaining groove 16 to complete the replacement. After the die holder is replaced, the bending die holder 17 achieves lateral and longitudinal limit through the tight engagement of the retaining plate 18 and the retaining groove 16 to ensure that it is precisely aligned with the bending blade 13 above. Then the hydraulic cylinder 12 on the fixing frame 11 can be activated, and the output end of the hydraulic cylinder 12 pushes the bending blade 13 to move vertically downward. At this time, the guide rods 14 on both sides of the bending cutter 13 slide synchronously along the slide rails of the fixed frame 11, forming a double-track constraint, strictly limiting the movement trajectory of the bending cutter 13 and preventing it from tilting under force. During the downward movement of the bending cutter 13, it will cooperate with the bending die base 17 to apply pressure to the plate material, such as the steel plate for fire doors, placed on the die base, so that the plate material is bent into a preset angle along the groove structure of the die base. After bending is completed, the hydraulic cylinder 12 drives the bending cutter 13 to return to its original position upward, and the guide rods 14 move upward synchronously to ensure that the bending cutter 13 accurately disengages from the workpiece. The operator can then remove the bent workpiece to complete a single bending operation.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A bending machine for producing fire doors, comprising a base (1), wherein a mounting groove (15) is provided on one side of the upper middle portion of the base (1), characterized in that: A bracket (31) is fixedly installed on one side of the lower middle part of the base (1). A lifting mechanism (2) is fixedly installed on both sides of the middle part of the bracket (31). The lifting mechanism (2) includes a sleeve (20). An upper guide groove (21) is opened above the middle part of the sleeve (20). A wide body groove (22) is opened below the middle part of the sleeve (20). A lifting seat (24) is rotatably installed in the middle part of the wide body groove (22). An upper support rod (23) is fixedly installed at the upper end of the lifting seat (24). A gear (30) is rotatably engaged at the lower end of the sleeve (20). A rotating shaft (28) is fixedly installed at the upper end of the middle part of the gear (30). A top plate (29) is fixedly installed on both sides of the upper end of the rotating shaft (28). A U-shaped groove (26) is opened on both sides of the middle part of the lifting seat (24). A groove (27) is opened on the other two sides of the middle part of the lifting seat (24).

2. The bending machine for producing fire doors according to claim 1, characterized in that: A fixed frame (11) is fixedly installed on the top of one end of the base (1). A hydraulic cylinder (12) is fixedly installed in the middle of one end of the fixed frame (11). A bending knife (13) is fixedly installed at the output end of the hydraulic cylinder (12). Guide rods (14) are slidably engaged on both sides of the middle of one end of the fixed frame (11). One end of each of the two guide rods (14) is fixedly connected to both sides of the middle of the bending knife (13).

3. A bending machine for producing fire doors according to claim 2, characterized in that: The mounting groove (15) has slots (16) at both ends on both sides of the middle. A bending die base (17) is engaged in the middle of the mounting groove (15). The bending knife (13) is located directly above the bending die base (17).

4. A bending machine for producing fire doors according to claim 3, characterized in that: Both ends of the bending die base (17) are fixedly installed with a card plate (18) on both sides of the middle part, and the card plate (18) is slidably engaged with the middle part of the corresponding card slot (16).

5. A bending machine for producing fire doors according to claim 1, characterized in that: The upper support rod (23) is slidably engaged with the middle part of the upper guide groove (21), the lifting seat (24) is slidably engaged with the middle part of the wide body groove (22), and a spring (25) is sleeved between the upper end of the lifting seat (24) and the inner wall of the upper end of the wide body groove (22), and the spring (25) is sleeved on the outer side of the middle part of the upper support rod (23).

6. A bending machine for producing fire doors according to claim 1, characterized in that: The top plate (29) and the U-shaped groove (26) are slidably engaged. The top plate (29) is snapped into the middle of the groove (27). A toothed plate (32) is slidably snapped into one side of the lower end of the bracket (31). A pull rod (33) is fixedly installed at one end of the toothed plate (32). The toothed plate (32) meshes with two gears (30) respectively. One end of each of the two lifting mechanisms (2) passes through the mounting groove (15) and abuts against the lower end of the bending mold base (17).

Images