Hydraulic shear with automatic adjustment of shear blade gap

Abstract

The utility model discloses a hydraulic shear of automatic adjustment shear blade gap relates to cutting mechanical equipment technical field, including frame, the inside of frame is equipped with lower shear blade and upper shear blade, the top surface fixed connection of upper shear blade has the installation platform, the top fixed connection of installation platform has first hydraulic oil cylinder, first hydraulic oil cylinder acts on installation platform to realize the interval adjustment work of upper shear blade and lower shear blade, the bottom of installation platform is equipped with first pressure relief component, and installation platform's both sides are equipped with second pressure relief component. That automatic adjustment shear blade gap's hydraulic shear, through visual and hydraulic double closed -loop control, realizes the dynamic matching of thickness and gap in hydraulic plate shearing machine, solves the precision error of manual regulation, and adopts double pressure relief mechanism, avoids rigid absorption impact force, causes the problem such as cutting edge collapse, connecting piece fatigue fracture, and the pressure relief plate is positioned to strip steel with support plate cooperation, effectively improves shearing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of cutting machinery and equipment technology, specifically to a hydraulic shear that automatically adjusts the blade gap. Background Technology

[0002] Cutting machinery and equipment technology refers to an industrial technology system that uses mechanical or hydraulic drive to apply shearing force to metal sheets to achieve precise cutting. Hydraulic shearing machines are a typical application of this technology, providing stable shearing force (up to 1000 kN) through a hydraulic system, and are suitable for sheets with a thickness of 0.5-12mm.

[0003] The prior art (Chinese patent application CN202422377612.4, filed on 2024-09-29) discloses a novel hydraulic shear. During use, it includes an upper blade holder, a lower blade holder, an upper shear blade, a lower shear blade, a first connecting column, a second connecting column, a first hydraulic cylinder, a second hydraulic cylinder, and a synchronization mechanism. The lower blade holder has a vertical slot. The upper blade holder is positioned above the lower blade holder by inserting the first and second connecting columns into the corresponding vertical slots. The first connecting column is connected to the second connecting column via the synchronization mechanism and is offset from the lower shear blade. The upper shear blade moves up and down in cooperation with the first and second hydraulic cylinders and the synchronization mechanism. The first and second hydraulic cylinders synchronously drive the upper blade holder and the upper shear blade to descend, thereby engaging with the lower shear blade on the lower blade holder to cut strip material. Compared to using a single hydraulic cylinder, using two hydraulic cylinders solves problems such as the inability to cut excessively thick strip steel, the excessive space occupied by the hydraulic shear, the difficulty in saving costs, and the difficulty in installation and maintenance.

[0004] Although existing technologies can improve the working efficiency of hydraulic shears, the gap adjustment between the upper and lower shear blades during operation requires manual operation, making it difficult to ensure the consistency of the gap. In severe cases, it can even cause equipment jamming accidents. Furthermore, when the upper and lower shear blades come into contact, they rely on the rigidity of the blade holder to absorb the impact force, lacking an effective pressure relief and buffering mechanism, which leads to problems such as blade chipping and fatigue fracture of connecting parts. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulic shear that automatically adjusts the shear blade gap, in order to solve the problems mentioned in the background art, such as the need for manual operation to adjust the gap between the upper and lower shear blades, which makes it difficult to ensure the consistency of the gap and may even cause equipment jamming accidents in severe cases. Furthermore, when the upper and lower shear blades come into contact, they rely on the rigidity of the blade holder itself to absorb the impact force, lacking an effective pressure relief and buffering mechanism, which leads to blade chipping and fatigue fracture of connecting parts.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic shear with automatic adjustment of the shear blade gap, comprising a frame, wherein a lower shear blade and an upper shear blade are provided inside the frame, a mounting platform is fixedly connected to the top surface of the upper shear blade, a first hydraulic cylinder is fixedly connected to the top of the mounting platform, the first hydraulic cylinder acts on the mounting platform to realize the adjustment of the gap between the upper and lower shear blades, a first pressure relief component is provided at the bottom of the mounting platform, and a second pressure relief component is provided on both sides of the mounting platform, the first pressure relief component and the second pressure relief component together act on the upper shear blade to realize the pressure relief of the upper shear blade.

[0007] As a preferred technical solution of this application, a workbench is fixedly connected to the bottom surface of the lower shear blade, and a support plate is fixedly connected to the top surface of the workbench.

[0008] As a preferred technical solution of this application, the first pressure relief assembly includes a pressure relief plate disposed at the bottom of the mounting platform. The top two sides of the pressure relief plate are fixedly connected with first guide rods. The first guide rods are slidably connected to the mounting platform, and a first spring is provided on the outside of the first guide rods.

[0009] As a preferred technical solution of this application, a second guide rod is fixedly connected to the top center of the pressure relief plate, and the pressure relief plate and the mounting platform form a sliding mechanism through the second guide rod.

[0010] As a preferred technical solution of this application, the pressure relief plate is located directly above the support plate, and both the pressure relief plate and the support plate are provided with anti-slip pads, which are made of rubber.

[0011] As a preferred technical solution of this application, the second pressure relief component includes a second hydraulic cylinder fixedly connected to the top surface of the frame, a support platform fixedly connected to the top surface of the second hydraulic cylinder, the support platform forming a telescopic mechanism through the second hydraulic cylinder, and the support platform being fixedly connected to the first hydraulic cylinder.

[0012] As a preferred technical solution of this application, a third guide rod is slidably installed at both ends of the support platform, and a second spring is provided on the outside of the third guide rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This hydraulic shear with automatic blade clearance adjustment adopts visual and hydraulic dual closed-loop control, realizing dynamic matching of thickness and clearance in the hydraulic shearing machine, solving the accuracy error of manual adjustment, and adopting a dual pressure relief mechanism. The second spring absorbs the lateral impact force through the third guide rod, forming the first pressure relief, and the combination of the first spring and the guide rod realizes vertical energy dissipation, forming the second pressure relief, avoiding rigid absorption of impact force, which can cause blade chipping, fatigue fracture of connecting parts, and other problems. In addition, the pressure relief plate cooperates with the support plate to limit the strip steel, effectively improving the shearing accuracy. The specific details are as follows: 1. The first hydraulic cylinder is powered by a hydraulic station, which outputs stable hydraulic power to control the extension and retraction of the piston rod. A vision sensor is installed on one side of the inner wall of the frame. The vision sensor acquires the edge image of the strip steel through high-resolution imaging, calculates the strip steel thickness, and transmits the data to the PLC via a bus. Corresponding to the preset gap adjustment formula, the PLC generates a pulse signal to drive the servo valve, thereby controlling the extension and retraction of the piston rod of the first hydraulic cylinder. This forms a closed-loop control, realizing the automatic adjustment of the gap between the upper and lower shear blades. This effectively solves the inconvenience of manual adjustment and can adapt to the continuous shearing requirements of strip steel of different thicknesses.

[0014] 2. Two second hydraulic cylinders are connected to a hydraulic station via pipelines. The hydraulic station controls the synchronous extension and retraction of the piston rods of the two second hydraulic cylinders. When the support platform descends, it slides on the outer wall of the third guide rod, compressing the second spring to achieve the first pressure relief. Before the upper shear blade contacts the strip, the pressure relief plate first contacts the top surface of the strip, compressing the first spring to achieve the second pressure relief. This avoids rigid absorption of impact force, which could cause the blade to chip. Furthermore, during the shearing process, the cooperation between the pressure relief plate and the support plate can limit the upper and lower sides of the strip, preventing the strip from shifting and effectively improving the shearing accuracy. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the right-side structure of this utility model; Figure 3 This is a schematic diagram of the upper shear blade structure of this utility model; Figure 4 This is a schematic diagram of the lower shear blade structure of this utility model; Figure 5 This is a schematic diagram of the first pressure relief component of this utility model; Figure 6 This is a schematic diagram of the second pressure relief component of this utility model.

[0016] In the diagram: 1. Frame; 2. Lower shear blade; 3. Upper shear blade; 4. Mounting platform; 5. First hydraulic cylinder; 6. First pressure relief assembly; 601. Pressure relief plate; 602. First guide rod; 603. First spring; 7. Second pressure relief assembly; 701. Second hydraulic cylinder; 702. Support platform; 703. Third guide rod; 704. Second spring; 8. Workbench; 9. Support plate. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1-6 This utility model provides the following technical solution: a hydraulic shear that automatically adjusts the shear blade gap.

[0019] Example 1: To address the issue that adjusting the gap between the upper shear blade 3 and the lower shear blade 2 requires manual operation, making it difficult to ensure consistent gaps and potentially causing equipment jamming, please refer to [link to relevant documentation]. Figures 1-4 The machine includes a frame 1, inside which are a lower shear blade 2 and an upper shear blade 3. A mounting platform 4 is fixedly connected to the top surface of the upper shear blade 3. A first hydraulic cylinder 5 is fixedly connected to the top of the mounting platform 4. The first hydraulic cylinder 5 acts on the mounting platform 4 to adjust the distance between the upper shear blade 3 and the lower shear blade 2.

[0020] In operation, the first hydraulic cylinder 5 is connected to a hydraulic station via a pipeline. The hydraulic station outputs stable hydraulic power to the first hydraulic cylinder 5, thereby controlling the extension or retraction of the piston rod at the bottom of the first hydraulic cylinder 5. A vision sensor is installed on one side of the inner wall of the frame 1. The vision sensor acquires images of the strip edge through high-resolution imaging and uses laser triangulation to calculate the strip thickness through pixel displacement. The vision sensor transmits the detected thickness data to the PLC via a bus. Corresponding to the preset gap adjustment formula, the PLC generates a pulse signal to drive the servo valve, thereby controlling the extension and retraction of the piston rod of the first hydraulic cylinder 5. Through the closed-loop control of the vision sensor and the first hydraulic cylinder 5, the gap between the upper shear blade 3 and the lower shear blade 2 can be automatically adjusted, effectively solving the inconvenience of manual adjustment and adapting to the continuous shearing requirements of strips of different thicknesses.

[0021] Example 2: To address the issue of blade chipping and fatigue fracture of connecting parts caused by the blade holder's rigidity absorbing impact force during contact between the upper shear blade 3 and the lower shear blade 2, the following measures are taken: Figures 1-6The technical solution shown includes a first pressure relief assembly 6 at the bottom of the mounting platform 4, and second pressure relief assemblies 7 on both sides of the mounting platform 4, as shown. Figure 4 As shown, a workbench 8 is fixedly connected to the bottom surface of the lower shear blade 2, and a support plate 9 is fixedly connected to the top surface of the workbench 8. Figure 5 As shown, the first pressure relief assembly 6 includes a pressure relief plate 601 disposed at the bottom of the mounting platform 4. First guide rods 602 are fixedly connected to both top two surfaces of the pressure relief plate 601. The first guide rods 602 are slidably connected to the mounting platform 4, and a first spring 603 is provided on the outside of the first guide rods 602. Figure 3 As shown, a second guide rod is fixedly connected to the top center of the pressure relief plate 601, and the pressure relief plate 601 forms a sliding mechanism with the mounting platform 4 through the second guide rod, as shown. Figure 2 As shown, the pressure relief plate 601 is located directly above the support plate 9, and both the pressure relief plate 601 and the support plate 9 have anti-slip pads on their surfaces, and the anti-slip pads are made of rubber. Figure 6 As shown, the second pressure relief assembly 7 includes a second hydraulic cylinder 701 fixedly connected to the top surface of the frame 1. A support platform 702 is fixedly connected to the top surface of the second hydraulic cylinder 701. The support platform 702 forms a telescopic mechanism through the second hydraulic cylinder 701, and the support platform 702 is fixedly connected to the first hydraulic cylinder 5. Figure 6 As shown, a third guide rod 703 is slidably installed at both ends of the support platform 702, and a second spring 704 is provided on the outside of the third guide rod 703.

[0022] In use, two second hydraulic cylinders 701 are provided, and each second hydraulic cylinder 701 is connected to a hydraulic station via a pipeline. The hydraulic station controls the piston rods of the two second hydraulic cylinders 701 to extend and retract synchronously, placing the strip steel to be sheared on the top surface of the support plate 9. The support platform 702 is controlled to descend, and the two ends of the support platform 702 slide on the outer wall of the third guide rod 703. The second spring 704 is compressed, and the elastic action of the second spring 704 achieves the first pressure relief. Before the upper shear blade 3 contacts the strip steel, the pressure relief plate 601 contacts the top surface of the strip steel. As the upper shear blade 3 descends, the first guide rod 602 and the second guide rod at the top of the pressure relief plate 601 slide between the first guide rod 602 and the mounting platform 4, and the first spring 603 is compressed, achieving the second pressure relief. This avoids rigid absorption of impact force, which can cause problems such as blade chipping and fatigue fracture of connecting parts. Furthermore, during the shearing process, the cooperation between the pressure relief plate 601 and the support plate 9 can limit the upper and lower sides of the strip steel, preventing deviation during shearing and effectively improving the shearing accuracy.

[0023] The above is the entire working process of the device, and the contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0024] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic shear with automatic adjustment of blade gap, comprising a frame (1), wherein the frame (1) is provided with a lower shear blade (2) and an upper shear blade (3) inside, characterized in that: The top surface of the upper shear blade (3) is fixedly connected to a mounting platform (4), and the top of the mounting platform (4) is fixedly connected to a first hydraulic cylinder (5). The first hydraulic cylinder (5) acts on the mounting platform (4) to realize the adjustment of the distance between the upper shear blade (3) and the lower shear blade (2). The bottom of the mounting platform (4) is provided with a first pressure relief component (6), and the two sides of the mounting platform (4) are provided with second pressure relief components (7). The first pressure relief component (6) and the second pressure relief component (7) work together on the upper shear blade (3) to realize the pressure relief of the upper shear blade (3).

2. The hydraulic shear with automatic blade clearance adjustment according to claim 1, characterized in that: The bottom surface of the lower shear blade (2) is fixedly connected to a workbench (8), and the top surface of the workbench (8) is fixedly connected to a support plate (9).

3. The hydraulic shear with automatic blade clearance adjustment according to claim 1, characterized in that: The first pressure relief assembly (6) includes a pressure relief plate (601) located at the bottom of the mounting platform (4). The top two sides of the pressure relief plate (601) are fixedly connected with a first guide rod (602). The first guide rod (602) is slidably connected to the mounting platform (4), and a first spring (603) is provided on the outside of the first guide rod (602).

4. The hydraulic shear with automatic blade clearance adjustment according to claim 3, characterized in that: The pressure relief plate (601) has a second guide rod fixedly connected to the top center, and the pressure relief plate (601) and the mounting platform (4) form a sliding mechanism through the second guide rod.

5. The hydraulic shear with automatic blade clearance adjustment according to claim 3, characterized in that: The pressure relief plate (601) is located directly above the support plate (9), and both the pressure relief plate (601) and the support plate (9) are provided with anti-slip sheets, which are made of rubber.

6. The hydraulic shear with automatic blade clearance adjustment according to claim 1, characterized in that: The second pressure relief assembly (7) includes a second hydraulic cylinder (701) fixedly connected to the top surface of the frame (1). A support platform (702) is fixedly connected to the top surface of the second hydraulic cylinder (701). The support platform (702) forms a telescopic mechanism through the second hydraulic cylinder (701), and the support platform (702) is fixedly connected to the first hydraulic cylinder (5).

7. The hydraulic shear with automatic blade clearance adjustment according to claim 6, characterized in that: Both ends of the support platform (702) are slidably mounted with a third guide rod (703), and a second spring (704) is provided on the outside of the third guide rod (703).

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