Hydraulic bending press

Abstract

The utility model discloses hydraulic bending press, including frame, upper tool rest, lower tool rest, lower mould and upper mould. The utility model discloses, through the pure mechanical structure of double hydraulic cylinder symmetrical drive and linkage shaft mechanical linkage, realize the forced synchronous action of left and right sides when upper tool rest elevating, thoroughly eliminate the stress imbalance problem caused by single hydraulic cylinder or asymmetric drive, effectively prevent bending line deviation and plate distortion, significantly improve bending straightness and size consistency, adopt the adjusting mechanism of screw and worm gear drive cooperation dial indication, and operating personnel can directly move through the rotation of ratchet drive stopper block, and the accurate positioning of real -time reading is combined dial, need not repeatedly use ruler measurement and trial machining verification, greatly shorten the adjustment time and improve the repeat positioning accuracy, and worm gear self -locking characteristic can avoid the accidental displacement of stopper block in the processing.

Description

Technical Field

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

[0002] In the field of precision sheet metal processing, traditional sheet metal bending machines generally suffer from two major technical bottlenecks in the bending and forming processes of stainless steel, aluminum alloy, and other sheets: First, the drive system often uses a single hydraulic cylinder or an asymmetrical power layout, leading to an imbalance of forces on both sides during the lifting and lowering of the upper tool holder. This easily causes bending line deviation and sheet metal distortion, severely affecting forming accuracy. Second, the stop mechanism usually adopts a fixed support structure, requiring manual adjustment of its position by turning screws and using a ruler. Each adjustment necessitates trial machining to verify positioning accuracy, resulting in cumbersome operation, low efficiency, and poor repeatability. While some synchronous improvement solutions exist in existing technologies, they mostly rely on complex electronic control systems for synchronous compensation, which is not only costly but also difficult to adapt to high-intensity processing environments. Therefore, a mechanical optimization solution with a simple structure, high synchronous accuracy, and the ability to quickly and accurately adjust the stop position is urgently needed. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a hydraulic bending machine.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a hydraulic bending machine, including a frame, an upper tool holder, a lower tool holder, a lower die, and an upper die. The upper and lower tool holders are arranged vertically on the front wall of the frame. The upper tool holder is slidably connected to the front wall of the frame via a guide plate and a guide rail. Two sets of hydraulic cylinders are fixedly connected to the upper wall of the frame near the front wall. The extension shaft ends of both sets of hydraulic cylinders are fixedly connected to the upper wall of the upper tool holder. A rotatable connection is provided between the left and right sides of the frame to control the left and right movement of the upper tool holder during lifting and lowering. The linkage shaft for synchronous operation has two sets of screws rotatably connected to each other in a left-right arrangement on the front wall of the lower tool holder, near the upper wall. The screws are rotatably connected to the front wall of the lower tool holder via a rotating seat. The rear end of the screw penetrates the inner wall of the lower tool holder, and a stop block is provided at the end of the screw extending to the rear side of the lower tool holder. A base plate is fixedly connected to the front wall of the lower tool holder, located to the right of the screws. A box is fixedly connected to the upper wall of the base plate. A worm gear is rotatably connected between the upper wall of the base plate and the upper inner wall of the box via a rotating rod. A scale is provided on the upper wall of the worm gear.

[0005] As a further description of the above technical solution:

[0006] The left and right ends of the linkage shaft pass through the left and right walls of the frame respectively and extend to the left and right sides of the frame respectively. A set of gears is fixedly connected to the two ends of the linkage shaft extending to the outside of the frame respectively. The left and right ends of the upper tool holder extend toward the left and right sides of the frame respectively. A set of rack plates is fixedly connected to the rear wall of the upper tool holder near the left and right ends respectively. The two sets of rack plates are respectively meshed with a set of gears.

[0007] As a further description of the above technical solution:

[0008] The end of the screw located in front of the lower tool holder penetrates the inner wall of the box and extends to the front of the box. The part of the screw located inside the box is provided with a worm section, which meshes with the outer wall of the worm wheel.

[0009] As a further description of the above technical solution:

[0010] A crank handle is fixedly connected to one end of the screw that extends to the front side of the housing.

[0011] As a further description of the above technical solution:

[0012] A guide rod extending toward the rear side of the lower tool holder is fixedly connected to the rear wall of the lower tool holder and above the screw. The end of the guide rod away from the lower tool holder is connected to the rear end of the screw through a connecting block. The guide rod is fixedly connected to the connecting block, and the screw is rotatably connected to the connecting block. A slider is threadedly connected to the outer wall of the screw between the lower tool holder and the connecting block. The guide rod passes through the inner wall of the slider and is slidably connected to the slider. The stop block is fixedly connected to the upper wall of the slider.

[0013] As a further description of the above technical solution:

[0014] The upper wall of the dial is provided with multiple sets of scale lines, and the multiple sets of scale lines are distributed in a circle with the axis of the dial as the center.

[0015] As a further description of the above technical solution:

[0016] The upper wall of the box, near the front wall, is provided with a scale window for easy observation of the dial.

[0017] As a further description of the above technical solution:

[0018] The lower die is disposed on the upper wall of the lower tool holder, and the upper die is disposed on the lower wall of the upper tool holder. The upper die and the lower die are arranged opposite each other in the vertical direction.

[0019] This utility model has the following beneficial effects:

[0020] 1. Compared with existing technologies, this hydraulic bending machine uses a purely mechanical structure with symmetrical drive of dual hydraulic cylinders and mechanical linkage of the linkage shaft to achieve forced synchronous movement of the left and right sides when the upper tool holder is raised and lowered. This completely eliminates the problem of force imbalance caused by single hydraulic cylinders or asymmetrical drive, effectively prevents bending line deviation and plate twisting deformation, and significantly improves bending straightness and dimensional consistency.

[0021] 2. Compared with existing technologies, this hydraulic bending machine adopts an adjustment mechanism with screw and worm gear transmission and dial indication. The operator can directly drive the stop block to move by rotating the crank handle. Combined with the real-time reading of the dial, the machine can accurately position itself without the need for repeated ruler measurement and trial processing. This significantly shortens the adjustment time and improves the repeatability of positioning. At the same time, the self-locking characteristic of the worm gear can prevent the stop block from being accidentally displaced during processing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the hydraulic bending machine proposed in this utility model;

[0023] Figure 2 The hydraulic bending machine proposed in this utility model Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 The hydraulic bending machine proposed in this utility model Figure 1 A magnified view of a section at point B in the middle;

[0025] Figure 4 This is a partial schematic diagram of the lower blade holder, base plate, turbine, and screw connection structure of the hydraulic bending machine proposed in this utility model.

[0026] Figure 5 This is a right rear view schematic diagram of the overall structure of the hydraulic bending machine proposed in this utility model.

[0027] Figure 6 The hydraulic bending machine proposed in this utility model Figure 5 A magnified view of a section at point C.

[0028] Legend:

[0029] 1. Frame; 2. Lower tool holder; 3. Upper tool holder; 4. Hydraulic cylinder; 5. Lower die; 6. Upper die; 7. Rack plate; 8. Linkage shaft; 9. Gear; 10. Base plate; 11. Box body; 12. Scale window; 13. Rotating seat; 14. Screw; 1401. Worm section; 15. Handle; 16. Worm wheel; 17. Scale dial; 18. Guide rod; 19. Connecting block; 20. Slider; 21. Stop block. Detailed Implementation

[0030] 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.

[0031] Reference Figures 1 to 6 The hydraulic bending machine provided by this utility model includes a frame 1, an upper knife holder 3, a lower knife holder 2, a lower die 5, and an upper die 6. The upper knife holder 3 and the lower knife holder 2 are arranged vertically on the front wall of the frame 1, and the upper die 6 is arranged on the lower wall of the upper knife holder 3. The upper die 6 and the lower die 5 are arranged opposite each other in the vertical direction.

[0032] By precisely aligning the lower die 5 and the upper die 6, the vertical bending action of the sheet metal is achieved, avoiding bending angle deviation caused by die misalignment.

[0033] In order to achieve stable lifting and synchronous power transmission of the upper tool holder 3, the upper tool holder 3 is slidably connected to the front wall of the frame 1 through the guide plate and guide rail. Two sets of hydraulic cylinders 4 are fixedly connected to the upper wall of the frame 1 near the front wall. The ends of the extension shafts of the two sets of hydraulic cylinders 4 are fixedly connected to the upper wall of the upper tool holder 3.

[0034] The dual hydraulic cylinders 4 symmetrically drive the upper tool holder 3 to move vertically along the guide rail, providing balanced driving force, avoiding the off-center load problem caused by single cylinder drive, and ensuring uniform distribution of bending pressure;

[0035] In order to force the synchronous lifting and lowering of the left and right sides of the upper tool holder 3 and eliminate the deviation of the bending line, a linkage shaft 8 is rotatably connected between the left and right sides of the frame 1 to control the synchronous left and right movement of the upper tool holder 3 during lifting and lowering. The left and right ends of the linkage shaft 8 pass through the left and right walls of the frame 1 respectively and extend to the left and right sides of the frame 1 respectively. A set of gears 9 are fixedly connected to the two ends of the linkage shaft 8 that extend to the outside of the frame 1 respectively. The left and right ends of the upper tool holder 3 extend toward the left and right sides of the frame 1 respectively. A set of rack plates 7 are fixedly connected to the rear wall of the upper tool holder 3 near the left and right ends respectively. The two sets of rack plates 7 mesh with a set of gears 9 respectively.

[0036] When the hydraulic cylinder 4 drives the upper tool holder 3 to rise and fall, the rack plate 7 drives the gear 9 to rotate, and the linkage shaft 8 forces the gears 9 on both sides to rotate synchronously, ensuring that the left and right movements of the upper tool holder 3 are completely synchronized, thus completely solving the problem of bending line distortion caused by asynchronous action.

[0037] To achieve linear movement and precise positioning of the stop block 21, replacing the traditional manual measurement and adjustment method, two sets of screws 14 are rotatably connected to each other in a left-right arrangement on the front wall of the lower tool holder 2 and near the upper wall. The screws 14 are rotatably connected to the front wall of the lower tool holder 2 through the rotating seat 13. The rear end of the screw 14 passes through the inner wall of the lower tool holder 2. The end of the screw 14 extending to the rear side of the lower tool holder 2 is provided with a stop block 21. A guide rod 18 extending towards the rear side of the lower tool holder 2 is fixedly connected to the rear wall of the lower tool holder 2 and above the screw 14. The end of the guide rod 18 away from the lower tool holder 2 is connected to the rear end of the screw 14 through the connecting block 19. The guide rod 18 is fixedly connected to the connecting block 19. The screw 14 is rotatably connected to the connecting block 19. A slider 20 is threadedly connected to the outer wall of the screw 14 and between the lower tool holder 2 and the connecting block 19. The guide rod 18 passes through the inner wall of the slider 20 and is slidably connected to the slider 20. The stop block 21 is fixedly connected to the upper wall of the slider 20.

[0038] When the screw 14 is rotated, the slider 20 moves linearly along the guide rod 18, driving the stop block 21 to move forward and backward precisely. The guide rod 18 eliminates the swaying of the screw 14, ensuring that the movement trajectory of the stop block 21 is straight, and avoiding the positioning deviation caused by traditional screw fixing.

[0039] To visualize the rotation of the screw 14 into the linear displacement of the stop block 21 and achieve rapid, ruler-free adjustment, a base plate 10 is fixedly connected to the front wall of the lower tool holder 2 and to the right of the screw 14. A housing 11 is fixedly connected to the upper wall of the base plate 10. A worm gear 16 is rotatably connected between the upper wall of the base plate 10 and the upper inner wall of the housing 11 via a rotating rod. A scale 17 is provided on the upper wall of the worm gear 16. One end of the screw 14, located in front of the lower tool holder 2, penetrates the inner wall of the housing 11 and extends to the front of the housing 11. On the side, a crank 15 is fixedly connected to one end of the screw 14 extending to the front side of the box 11. The part of the screw 14 located inside the box 11 is provided with a worm section 1401. The worm section 1401 meshes with the outer wall of the worm wheel 16. Multiple sets of scale lines are provided on the upper wall of the dial 17. The multiple sets of scale lines are evenly distributed in a circle with the axis of the dial 17 as the center. A scale window 12 is provided on the upper wall of the box 11 near the front wall for easy observation of the dial 17. The lower mold 5 is set on the upper wall of the lower tool holder 2.

[0040] When the crank handle 15 drives the screw 14 to rotate, the worm section 1401 drives the worm wheel 16 and the scale 17 to rotate. The operator can directly read the scale line of the scale 17 through the scale window 12. The scale line is the displacement of the stop block 21 calculated in combination with the worm gear transmission ratio, realizing the integrated operation of "rotating the crank handle - scale reading - precise positioning", replacing the traditional ruler measurement trial and error process, and greatly improving the adjustment efficiency.

[0041] Working principle: Precise alignment of the lower die 5 and upper die 6 achieves vertical bending of the sheet metal, avoiding bending angle deviations caused by die misalignment; dual hydraulic cylinders 4 symmetrically drive the upper tool holder 3 to move vertically along the guide rail, providing balanced driving force and avoiding uneven load problems caused by single-cylinder drive, ensuring uniform bending pressure distribution; when the hydraulic cylinder 4 drives the upper tool holder 3 to rise and fall, the rack plate 7 drives the gear 9 to rotate, and the linkage shaft 8 forces the left and right gears 9 to rotate synchronously, ensuring that the left and right movements of the upper tool holder 3 are completely synchronized, completely solving the bending line distortion caused by asynchronous action; when the screw 14 rotates, the slider 20 moves along the guide rod... The linear movement of the guide rod 18 drives the stop block 21 to move precisely forward and backward. The guide rod 18 eliminates the sway of the screw 14, ensuring that the movement trajectory of the stop block 21 is straight and avoiding the positioning deviation caused by traditional screw fixing. When the rotating handle 15 drives the screw 14 to rotate, the worm section 1401 drives the worm wheel 16 and the scale 17 to rotate. The operator can directly read the scale line of the scale 17 through the scale window 12. The scale line is the displacement of the stop block 21 calculated in combination with the worm gear transmission ratio, realizing the integrated operation of "rotating handle - scale reading - precise positioning", replacing the traditional ruler measurement trial and error process, and greatly improving the adjustment efficiency.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic plate bending machine, characterized in that: The system includes a frame (1), an upper tool holder (3), a lower tool holder (2), a lower die (5), and an upper die (6). The upper tool holder (3) and the lower tool holder (2) are arranged vertically on the front wall of the frame (1). The upper tool holder (3) is slidably connected to the front wall of the frame (1) via a guide plate and a guide rail. Two sets of hydraulic cylinders (4) are fixedly connected to the upper wall of the frame (1) near the front wall. The ends of the extension shafts of the two sets of hydraulic cylinders (4) are fixedly connected to the upper wall of the upper tool holder (3). A linkage shaft (8) for controlling the synchronous movement of the upper tool holder (3) when it rises and falls is rotatably connected between the left and right sides of the frame (1). The lower tool holder (2) is arranged vertically on the front wall near the upper wall. Two sets of screws (14) are rotatably connected to each other on the left and right sides. The screws (14) are rotatably connected to the front wall of the lower tool holder (2) through the rotating seat (13). The rear end of the screws (14) passes through the inner wall of the lower tool holder (2). A stop block (21) is provided at the end of the screws (14) extending to the rear side of the lower tool holder (2). A base plate (10) is fixedly connected to the front wall of the lower tool holder (2) and located to the right of the screws (14). A box body (11) is fixedly connected to the upper wall of the base plate (10). A worm gear (16) is rotatably connected between the upper wall of the base plate (10) and the inner upper wall of the box body (11) through a rotating rod. A scale (17) is provided on the upper wall of the worm gear (16).

2. The hydraulic bending machine according to claim 1, characterized in that: The left and right ends of the linkage shaft (8) pass through the left and right walls of the frame (1) respectively and extend to the left and right sides of the frame (1). A set of gears (9) are fixedly connected to the two ends of the linkage shaft (8) extending to the outside of the frame (1). The left and right ends of the upper tool holder (3) extend toward the left and right sides of the frame (1) respectively. A set of rack plates (7) are fixedly connected to the rear wall of the upper tool holder (3) near the left and right ends respectively. The two sets of rack plates (7) mesh with a set of gears (9) respectively.

3. The hydraulic bending machine according to claim 2, characterized in that: The end of the screw (14) located in front of the lower tool holder (2) penetrates the inner wall of the box body (11) and extends to the front of the box body (11). The part of the screw (14) located inside the box body (11) is provided with a worm section (1401), which meshes with the outer wall of the worm wheel (16).

4. The hydraulic bending machine according to claim 3, characterized in that: A crank handle (15) is fixedly connected to one end of the screw (14) that extends to the front side of the box (11).

5. The hydraulic bending machine according to claim 4, characterized in that: A guide rod (18) extending toward the rear side of the lower tool holder (2) is fixedly connected to the rear wall of the lower tool holder (2) and above the screw (14). The end of the guide rod (18) away from the lower tool holder (2) is connected to the rear end of the screw (14) through a connecting block (19). The guide rod (18) is fixedly connected to the connecting block (19). The screw (14) is rotatably connected to the connecting block (19). A slider (20) is threadedly connected to the outer wall of the screw (14) between the lower tool holder (2) and the connecting block (19). The guide rod (18) passes through the inner wall of the slider (20) and is slidably connected to the slider (20). The stop block (21) is fixedly connected to the upper wall of the slider (20).

6. The hydraulic bending machine according to claim 5, characterized in that: The upper wall of the dial (17) is provided with multiple sets of scale lines, and the multiple sets of scale lines are distributed in a circle with the axis of the dial (17) as the center.

7. The hydraulic bending machine according to claim 6, characterized in that: The upper wall of the box (11) near the front wall is provided with a scale window (12) for easy observation of the scale (17).

8. The hydraulic bending machine according to claim 7, characterized in that: The lower die (5) is set on the upper wall of the lower tool holder (2), and the upper die (6) is set on the lower wall of the upper tool holder (3). The upper die (6) and the lower die (5) are arranged opposite each other in the vertical direction.

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