Hydraulic bending forming machine for sheet metal

Abstract

The utility model discloses a kind of metal sheet hydraulic bending forming machines, belong to metal sheet processing equipment technical field.The forming machine aims at solving the problem of low replacement efficiency of existing bending machine lower mould, insufficient sheet positioning accuracy.The utility model includes bending machine, support, base, upper die and lower die, base side wall is provided with replacement component, the replacement component is through the linkage of rotating plate, rotating rod and inserting rod, realize the quick locking and release of the lower mould reserved hole, and utilize first spring to realize automatic reset locking.Meanwhile, bending machine main body is fixedly connected with positioning component through support block, the positioning component includes lug and second spring.The utility model is through the combination of the quick replacement mechanism and spring reset type positioning mechanism of lower mould, reaches the improvement of die changing speed and operation convenience, enhanced the versatility of equipment, and realized the accurate positioning of sheet bending line, effectively improved processing accuracy and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metal sheet processing equipment, and in particular to a hydraulic bending and forming machine for metal sheets. Background Technology

[0002] Metal sheet bending forming machines are among the most widely used equipment in the sheet metal processing industry. Traditional hydraulic bending machines mainly rely on hydraulic cylinders to drive the upper die to move vertically downwards, which, together with the lower die fixed on the worktable, applies pressure to the metal sheet, causing it to undergo plastic deformation along the V-groove of the lower die, thereby completing a bend at a specific angle.

[0003] However, in actual production, to meet customer demands for different products and bending angles, operators need to frequently change the lower die. Existing bending machines typically use bolts or other mechanical methods to fix the lower die. The process of unlocking, disassembling, installing, and retightening these dies is complex and time-consuming, requiring significant manpower and time. Especially in flexible production models with small batches and diverse product varieties, this inefficient die-changing method has become a major bottleneck restricting production efficiency. This cumbersome mechanical fixing and unlocking method greatly delays the effective working time of the equipment, affecting the versatility and economic benefits of the bending machine.

[0004] Furthermore, after changing the lower die, how to quickly and accurately position the sheet material to be processed, ensuring that its bending line is precisely aligned with the center line of the lower die, is also a key factor affecting bending quality and efficiency. Traditional positioning mechanisms often rely on manual alignment or simple material stops, resulting in low accuracy. Moreover, the positioning and fixing processes are equally time-consuming, making it difficult to prepare for rapid production.

[0005] Therefore, this utility model proposes a hydraulic bending forming machine for metal sheets, aiming to solve the defects of the existing technology, such as complicated and time-consuming lower die replacement operation, as well as low plate positioning efficiency and insufficient accuracy. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a hydraulic bending forming machine for metal sheets, which aims to improve the problems in the prior art of difficulty in quickly and accurately positioning the bending line of the sheet metal and efficiently and conveniently changing the lower die to adapt to the processing requirements of different bending angles.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic bending forming machine for metal sheets, comprising a bending machine, a support, a base, a hydraulic cylinder, an upper die, a lower die, and an operation screen.

[0008] The base has a replacement assembly on its side wall for locking and releasing the lower mold. The replacement assembly includes a fixed plate, a rotating plate, a rotating rod rotatably connected to the fixed plate, and an insert rod driven by the rotating rod and slidably fitted inside the cavity of the fixed plate. The insert rod can slide in a preset direction inside the cavity to insert into or retract into a pre-drilled hole on the lower mold. This replacement assembly enables rapid replacement and automatic locking of the lower mold.

[0009] Furthermore, a positioning assembly is fixedly connected to the main structure of the bending machine via a support block for positioning the sheet metal before bending. The positioning assembly includes a slotted plate, a fixed rod fixedly connected inside the slotted plate, a protrusion rotating around the side wall of the fixed rod, and a second spring with one end fixedly connected to the inner wall of the slotted plate and the other end connected to the side wall of the protrusion. The elastic force provided by the second spring drives the protrusion to press against the edge of the sheet metal, ensuring the positioning accuracy of the sheet metal.

[0010] Preferably, a sliding rod is slidably fitted inside the bracket, and the sliding rod is fixedly connected to the upper mold. A limiting ring surrounding the outer circumference of the sliding rod is also provided on the inner side wall of the bracket. The limiting ring is fixedly installed on the inner side wall of the bracket, and the sliding rod slides through the limiting ring. The sliding rod and the limiting ring ensure the stability and safety of the vertical lifting of the upper mold.

[0011] Preferably, one end of the insertion rod faces the pre-drilled hole, and a first spring is disposed inside the cavity. One end of the first spring is fixed to the inner wall of the cavity, and the other end is connected to the side wall of the insertion rod. The end of the insertion rod away from the first spring is connected to the bottom of the rotating rod. The first spring provides a restoring force after the unlocking operation, thereby achieving automatic locking of the lower mold.

[0012] Preferably, the base is provided with a support block, and the positioning component is fixedly connected to the support block, the support block providing a stable installation foundation for the positioning component.

[0013] Preferably, when the second spring is in a compressed state, the protrusion rotates, causing the protrusion to disengage from the edge of the plate, which facilitates the placement and removal of the plate.

[0014] Preferably, the operation screen is located outside the bending machine and electrically connected to the hydraulic cylinder, used to issue bending commands and set processing parameters.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the problems of cumbersome and inefficient lower mold replacement operations in the prior art by setting a replacement component on the side wall of the base and using a rotating plate, rotating rod and insert rod to achieve quick unlocking and automatic locking of the lower mold. It achieves the effect of improving mold replacement speed and operation convenience.

[0016] 2. This utility model solves the problem of difficulty in ensuring the positioning accuracy of the sheet metal before bending by setting a spring-reset positioning component on the main body of the bending machine, using the protrusion as the positioning reference surface, and using the elastic force of the second spring to achieve the pressing and positioning of the edge of the sheet metal. This achieves the effect of accurately positioning the bending line of the sheet metal and improving the processing accuracy. Attached Figure Description

[0017] Figure 1 This is a perspective view of a hydraulic bending and forming machine for metal sheets proposed in this utility model; Figure 2 This is a schematic diagram of the replacement components of a hydraulic bending and forming machine for metal sheets proposed in this utility model; Figure 3 This is a schematic diagram of the positioning component of a hydraulic bending and forming machine for metal sheets proposed in this utility model; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0018] Legend: 1. Bending machine; 2. Support frame; 3. Base; 4. Lower die; 5. Replacement component; 501. Pre-drilled hole; 502. Cavity; 503. Insert rod; 504. First spring; 505. Rotating rod; 506. Fixing plate; 507. Rotating plate; 6. Support block; 7. Positioning component; 701. Slotted plate; 702. Fixing rod; 703. Protrusion; 704. Second spring; 8. Hydraulic cylinder; 9. Upper die; 10. Sliding rod; 11. Limiting ring; 12. Operation panel. Detailed Implementation

[0019] 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.

[0020] Reference Figures 1-5This utility model provides an embodiment of a hydraulic bending and forming machine for metal sheets, including a bending machine 1, a support 2 disposed inside the bending machine 1, and a base 3 disposed at the bottom of the bending machine 1. The bending machine 1 serves as the core frame and main carrier of the entire forming machine. An operation screen 12 for parameter setting and issuing operation commands is provided outside the bending machine 1. Regarding the bending drive system, a hydraulic cylinder 8 is installed inside the bracket 2 to provide driving force. The output end of the hydraulic cylinder 8 is connected to the upper die 9, which is used to press the sheet metal downwards to achieve the bending action. In order to ensure the vertical stability and safety of the movement of the upper die 9, a sliding rod 10 is slidably fitted inside the bracket 2. The sliding rod 10 is fixedly connected to the upper die 9 and can move synchronously with the upper die 9. A limiting ring 11 is also fixedly installed on the inner side wall of the bracket 2, surrounding the outer periphery of the sliding rod 10. The sliding rod 10 slides through the limiting ring 11. The function of the limiting ring 11 is to prevent the sliding rod 10 from sliding out of the bracket 2 and to ensure the accuracy of the movement trajectory. The base 3 is equipped with a lower die 4 that works with the upper die 9 to bend the sheet metal. A replacement assembly 5 is located on the side wall of the base 3 for locking and unlocking the lower die 4. The replacement assembly 5 includes a fixed plate 506, a rotating plate 507, a rotating rod 505 rotatably connected to the fixed plate 506, and an insertion rod 503 driven by the rotating rod 505 and slidably fitted into the cavity 502 inside the fixed plate 506. The rotating plate 507 is located outside the fixed plate 506 for easy operation by the operator. One end of the insertion rod 503 faces a pre-drilled hole 501 on the lower die 4. The insertion rod 503 can slide in a preset direction inside the cavity 502, extending into or retracting from the pre-drilled hole 501, thereby locking and unlocking the lower die 4. A first spring 504 is also provided inside the cavity 502. One end of the first spring 504 is fixed to the inner wall of the cavity 502, and the other end is connected to the side wall of the insertion rod 503. It is used to push the insertion rod 503 back into the reserved hole 501 after the insertion rod 503 is unlocked, so as to realize the automatic locking of the lower mold 4. The end of the insertion rod 503 away from the first spring 504 is connected to the bottom of the rotating rod 505. The insertion rod 503 is pulled by the rotation of the rotating rod 505 to achieve sliding. The main structure of the bending machine 1 is equipped with a support block 6, and a positioning component 7 is fixedly connected to the support block 6. The positioning component 7 is used to determine the precise position of the sheet metal before bending. The positioning component 7 includes a slotted plate 701, a fixing rod 702 fixedly connected inside the slotted plate 701, a protrusion 703 rotating around the side wall of the fixing rod 702, and a second spring 704 with one end fixedly connected to the inner wall of the slotted plate 701 and the other end connected to the side wall of the protrusion 703. When the second spring 704 is in an uncompressed state, it pushes the protrusion 703 to the positioning position, and the bottom of the protrusion of the protrusion 703 serves as the positioning reference surface of the sheet metal. Replacing component 5 is key to achieving rapid locking of the lower mold 4. Component 5 includes a fixed plate 506, a rotating plate 507, a rotating rod 505, an insert rod 503, a cavity 502, and a first spring 504. The fixing plate 506 is connected to the side wall of the base 3 by bolts or other means. A cavity 502 is formed inside the fixing plate 506 to accommodate the insertion rod 503 and the first spring 504. A rotating plate 507 is located outside the fixing plate 506 for manual operation. A rotating rod 505 is rotatably engaged inside the fixing plate 506; rotation of the rotating rod 505 can pull the insertion rod 503 to slide. The insertion rod 503 is slidably fitted inside the cavity 502, with its front end facing the reserved hole 501 of the lower mold 4. The end of the insertion rod 503 away from the reserved hole 501 is connected to the bottom of the rotating rod 505 through a connector. When the rotating plate 507 is rotated, the rotating rod 505 drives the insertion rod 503 to slide back and forth in the cavity 502 along a preset direction. The first spring 504 is disposed inside the cavity 502. One end of the first spring 504 is fixed to the inner wall of the cavity 502, and the other end is connected to the side wall of the insertion rod 503. When the operator moves the rotating plate 507 to make the insertion rod 503 exit the reserved hole 501, the first spring 504 is compressed and stores energy. After the rotating plate 507 is released, the first spring 504 returns to its original position and pushes the insertion rod 503 to automatically extend into the reserved hole 501 of the lower mold 4, completing the rapid locking of the lower mold 4 and ensuring that the lower mold 4 will not move during the bending process. The positioning component 7 is crucial for ensuring the accuracy of the sheet metal bending line. The positioning component 7 is fixedly connected to the main structure of the bending machine 1 via a support block 6, which provides a stable mounting base for the positioning component 7. The positioning component 7 includes a slotted plate 701, a fixing rod 702, a protrusion 703, and a second spring 704. The fixing rod 702 is fixedly connected to the inside of the slotted plate 701 and serves as the pivot of the protrusion 703. The protrusion 703 rotates around the side wall of the fixing rod 702. The protrusion 703 is provided with a bottom protrusion, which serves as a reference surface for positioning the plate before bending. One end of the second spring 704 is fixedly connected to the inner wall of the slotted plate 701, and the other end is connected to the side wall of the protrusion 703. In the unloaded state, the second spring 704 pushes the protrusion 703 to the positioning position. When the operator moves the protrusion 703 to tilt it backward, the second spring 704 is compressed, leaving space for the plate to be placed. After the plate is placed in place and fits against the protrusion 703, the protrusion 703 is released, the second spring 704 returns to its original position and drives the protrusion 703 to press the edge of the plate, thus achieving precise positioning and fixing of the plate before bending. As a preferred embodiment, in order to ensure the vertical stability and safety of the upper mold 9 movement, a sliding rod 10 is slidably fitted inside the bracket 2. The sliding rod 10 is fixedly connected to the upper mold 9 and can move synchronously with the upper mold 9. A limiting ring 11 surrounding the outer periphery of the sliding rod 10 is also fixedly installed on the inner side wall of the bracket 2. The sliding rod 10 slides through the limiting ring 11. The setting of the limiting ring 11 effectively restricts the axial movement of the sliding rod 10 and prevents the sliding rod 10 from sliding out of the bracket 2. This structure ensures high precision and high stability when the upper mold 9 is pressed down. As another preferred embodiment, in order to ensure the transmission stability of the lower mold 4 replacement mechanism, the replacement component 5 includes a fixing plate 506, which is fixedly connected to the side wall of the base 3. The rotating rod 505 is rotatably engaged inside the fixing plate 506, and the rotation of the rotating rod 505 drives the insertion rod 503 to slide. In another preferred embodiment, in order to achieve automatic locking of the lower mold 4, a first spring 504 is provided inside the cavity 502. One end of the first spring 504 is fixed to the inner wall of the cavity 502, and the other end is connected to the side wall of the insertion rod 503. The elastic force of the first spring 504 is directed towards the reserved hole 501. After the operator releases the rotating plate 507, the first spring 504 provides a restoring force, pushing the insertion rod 503 into the reserved hole 501 to complete the locking. At the same time, the end of the insertion rod 503 away from the first spring 504 is connected to the bottom of the rotating rod 505, realizing bidirectional traction and release of the insertion rod 503 by the rotating rod 505. As another preferred embodiment, in order to provide a stable installation reference for the positioning component 7, a support block 6 is provided on the base 3, and the positioning component 7 is fixedly connected to the support block 6. The provision of the support block 6 makes the installation position of the positioning component 7 adjustable. As another preferred embodiment, in order to realize the quick reset and clamping function of the positioning component 7, the positioning component 7 includes a slotted plate 701, a fixing rod 702 fixedly connected inside the slotted plate 701, a protrusion 703 rotating around the side wall of the fixing rod 702, and when the second spring 704 is in a compressed state, it pushes the protrusion 703 to rotate so that the protrusion 703 disengages from the edge of the plate, which facilitates the placement and removal of the plate. The elastic force provided by the second spring 704 ensures the stability of the plate after positioning. As another preferred embodiment, in order to facilitate user operation and parameter setting of the equipment, the operation screen 12 is located outside the bending machine 1 and is electrically connected to the hydraulic cylinder 8. After the bending command is input through the operation screen 12, the hydraulic cylinder 8 receives the electrical signal and starts to work.

[0021] Working principle: Place the bending machine 1 in the designated position, and the operator sets parameters through the control panel 12, such as the required bending angle. Based on the set angle, it is first necessary to ensure that the lower die 4 is compatible.

[0022] When the lower mold 4 needs to be replaced, the operator moves the rotating plate 507 on the replacement assembly 5, causing the rotating rod 505 to rotate inside the fixed plate 506. The rotating rod 505 pulls the insertion rod 503 to slide within the cavity 502. At this time, the first spring 504 is compressed, and the insertion rod 503 slides out of the reserved hole 501 on the lower mold 4, releasing the lock on the original lower mold 4. The operator can then remove the original lower mold 4 and replace it with a new lower mold 4 with a suitable angle. After the replacement is completed, the rotating plate 507 is released, the compressed first spring 504 returns to its original position, and pushes the insertion rod 503 to automatically insert into the reserved hole 501 of the new lower mold 4, completing the quick locking.

[0023] After the lower die 4 is replaced, the sheet material to be bent is placed stably on the lower die 4. Then, the positioning component 7 is activated to accurately position the sheet material. The operator moves the protrusion 703 to tilt it backward, and the protrusion 703 rotates around the side wall of the fixing rod 702, compressing the second spring 704. At this time, the edge of the sheet material is placed against the bottom of the protrusion of the protrusion 703 (as the positioning reference surface). After releasing the protrusion 703, the second spring 704 returns to its original position and drives the protrusion 703 to press the edge of the sheet material, completing the accurate positioning before bending.

[0024] After the sheet metal is positioned and fixed, the operator issues a bending command through the control panel 12, activating the hydraulic cylinder 8. The hydraulic cylinder 8 outputs driving force, causing the upper die 9 to press down vertically. During the pressing process, the sliding rod 10 moves synchronously with the upper die 9, and the limiting ring 11 limits the sliding rod 10 to prevent it from sliding out of the bracket 2, ensuring the vertical stability of the upper die 9. The upper die 9 continues to press down until it contacts the sheet metal. Under the coordinated action of the upper die 9 and the lower die 4, the sheet metal undergoes plastic deformation along the forming surface of the lower die 4, ultimately completing the bending process at the preset angle.

Claims

1. A hydraulic bending and forming machine for metal sheets, comprising: A bending machine (1), a support (2) disposed inside the bending machine (1), a base (3) disposed at the bottom of the bending machine (1), and an operation screen (12) disposed outside the bending machine (1); a hydraulic cylinder (8) is disposed inside the support (2), and the output end of the hydraulic cylinder (8) is connected to the upper die (9); a lower die (4) is disposed on the base (3) for bending the sheet metal in conjunction with the upper die (9); Its features are: The base (3) is provided with a replacement assembly (5) on its side wall. The replacement assembly (5) is used to lock and release the lower mold (4). The replacement assembly (5) includes a fixed plate (506), a rotating plate (507), a rotating rod (505) rotatably connected to the fixed plate (506), and an insertion rod (503) driven by the rotating rod (505) and slidably fitted inside the cavity (502) of the fixed plate (506). The insertion rod (503) can slide in a preset direction inside the cavity (502) to extend into or exit the reserved hole (501) provided on the lower mold (4). The main structure of the bending machine (1) is fixedly connected to a positioning component (7) via a support block (6). The positioning component (7) is used to position the sheet metal before bending. The positioning component (7) includes a slotted plate (701), a fixing rod (702) fixedly connected inside the slotted plate (701), a protrusion (703) rotating around the side wall of the fixing rod (702), and a second spring (704) with one end fixedly connected to the inner wall of the slotted plate (701) and the other end connected to the side wall of the protrusion (703).

2. The metal sheet hydraulic bending forming machine according to claim 1, characterized in that, The bracket (2) has a sliding rod (10) inside, which is fixedly connected to the upper mold (9). The bracket (2) also has a limiting ring (11) surrounding the outer periphery of the sliding rod (10).

3. The metal sheet hydraulic bending forming machine according to claim 2, characterized in that, The limiting ring (11) is fixedly installed on the inner side wall of the bracket (2), and the sliding rod (10) slides through the limiting ring (11).

4. The metal sheet hydraulic bending forming machine according to claim 1, characterized in that, One end of the insertion rod (503) faces the reserved hole (501), and a first spring (504) is provided inside the cavity (502). One end of the first spring (504) is fixed to the inner wall of the cavity (502), and the other end is connected to the side wall of the insertion rod (503).

5. The metal sheet hydraulic bending forming machine according to claim 4, characterized in that, The end of the insert (503) away from the first spring (504) is connected to the bottom of the rotating rod (505).

6. The metal sheet hydraulic bending forming machine according to claim 1, characterized in that, A support block (6) is provided on the base (3), and the positioning component (7) is fixedly connected to the support block (6).

7. The metal sheet hydraulic bending forming machine according to claim 1, characterized in that, When the second spring (704) is in a compressed state, the protrusion (703) rotates, causing the protrusion (703) to disengage from the edge of the plate.

8. The metal sheet hydraulic bending forming machine according to claim 1, characterized in that, The operation panel (12) is electrically connected to the hydraulic cylinder (8).

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