A stamping compensation structure for an electro-hydraulic bending machine

Abstract

This utility model discloses a stamping compensation structure for an electro-hydraulic bending machine, belonging to the technical field of bending machines. The electro-hydraulic bending machine stamping compensation structure includes a bending machine housing, hydraulic tanks on both sides of the worktable, two inclined support arms mounted on the upper end of a support frame, sliding blocks mounted on the lower ends of the two inclined support arms, and hydraulic cylinders mounted on the outer sides of the two sliding blocks. This utility model solves the problem that existing compensation structures cannot achieve targeted compensation. When the bending machine slider presses down, causing the middle of the worktable to sink, the hydraulic cylinder pushes the bottom of the inclined support arm to slide outward along the horizontal guide rail, increasing the inclination angle of the inclined support arm and lifting the top support point upward. The vertical component force counteracts the sinking of the worktable. If the force on the worktable decreases, the hydraulic cylinder pulls the bottom of the inclined support arm to slide inward, causing the top support point to fall back. The horizontal sliding of the inclined support arm is converted into vertical support force, achieving targeted compensation in the middle of the worktable.

Description

Technical Field

[0001] This utility model relates to the field of bending machine technology, specifically to a stamping compensation structure for an electro-hydraulic bending machine. Background Technology

[0002] The stamping compensation structure of an electro-hydraulic bending machine is a key technology for solving the deformation problem of the slider and worktable during the bending process. Its core objective is to ensure the angular consistency of the workpiece throughout its entire length by dynamically adjusting the compensation amount.

[0003] Chinese Patent CN204912403U discloses a bending machine angle compensation workbench and the bending machine thereof, belonging to the field of bending machine technology. The bending machine angle compensation workbench includes a workbench body, an upper wedge, a lower wedge, a hexagon socket screw, and a retaining spring. The workbench body has a U-shaped groove in the middle, and a stepped hole (larger on the outside, smaller on the inside) on one side of the workbench body; this stepped hole serves as a bolt hole. The upper and lower wedges are positioned vertically within the U-shaped groove. The lower wedge has a threaded hole on its side near the bolt hole. The hexagon socket screw passes through the bolt hole in the workbench body and is inserted into the threaded hole of the lower wedge, with the threaded end of the hexagon socket screw engaging with the threaded hole. The retaining spring is located inside the bolt hole, outside the hexagon socket screw. This patent can compensate for the bending angle of sheet metal, improving bending quality; it has a simple structure and is easy to adjust.

[0004] The compensation structure described in the above patent is complex in actual use and cannot provide targeted compensation; therefore, it does not meet the current needs. In response, we propose a stamping compensation structure for an electro-hydraulic bending machine. Utility Model Content

[0005] The purpose of this utility model is to provide a stamping compensation structure for an electro-hydraulic bending machine, which solves the problem that the compensation structure proposed in the background art is complex in actual use and cannot achieve targeted compensation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stamping compensation structure for an electro-hydraulic bending machine, comprising a bending machine housing, a worktable installed below the bending machine housing, hydraulic tanks provided on both sides of the worktable, and a support frame installed below the worktable. Two inclined support arms are installed at the upper end of the support frame, sliding blocks are installed at the lower ends of the two inclined support arms, and hydraulic cylinders are installed on the outer sides of the two sliding blocks.

[0007] Preferably, a bending machine slider is installed inside the bending machine housing, the position of the bending machine slider corresponds to the position of the worktable, and a display screen is installed on one side of the bending machine housing.

[0008] Preferably, a proportional valve is provided between the hydraulic tank and the hydraulic cylinder, a piston rod is installed at the front end of the hydraulic cylinder, the piston rod is equipped with a displacement sensor, and the displacement sensor is connected to the proportional valve through a PLC module.

[0009] Preferably, the upper end of the workbench is fixedly connected to a bending mold by bolts, and an integrally formed mounting cavity is provided between the workbench and the support frame.

[0010] Preferably, a guide rail is installed on the upper end face of the support frame, and the sliding block is horizontally slidably connected to the upper end of the support frame through the guide rail.

[0011] Preferably, a connecting plate is fixedly connected to the bottom center of the workbench by screws, and a limit support is hinged to the upper end of the inclined support arm. The limit support is connected to the connecting plate by fixing screws, and a buffer pad is installed between the connecting plate and the limit support.

[0012] Preferably, the lower end of the inclined support arm is hinged to the sliding block, and a connector is installed at one end of the sliding block. The connector is fixedly connected to the piston rod through a positioning groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The stamping compensation structure of this utility model adopts two symmetrical inclined arms, which are arranged in a figure-eight shape under the worktable. The top of the inclined arms is hinged to the lower end of the worktable, and the bottom of the inclined arms cooperates with the horizontal guide rail through the sliding block. The hydraulic cylinder and piston rod output horizontal thrust to adjust the horizontal position of the sliding block. When the bending machine slider presses down and causes the middle of the worktable to sink, the hydraulic cylinder pushes the bottom of the inclined arm to slide outward along the horizontal guide rail, increasing the tilt angle of the inclined arm and lifting the top support point upward. The vertical component force counteracts the sinking of the worktable. Conversely, if the force on the worktable decreases, the hydraulic cylinder pulls the bottom of the inclined arm to slide inward, and the top support point falls back to avoid over-support. The horizontal sliding of the inclined arm is converted into vertical support force, which can achieve targeted compensation in the middle of the worktable. The structural principle is feasible and the cost is low. Combined with the closed-loop control of the displacement sensor and proportional valve in the hydraulic tank, the dynamic response and force matching accuracy are further improved.

[0015] 2. The hydraulic cylinder of this utility model is arranged horizontally, which saves more longitudinal space compared with the vertically arranged hydraulic cylinder. It is especially suitable for scenarios where the space at the bottom of the workbench is narrow. The angle of the inclined support arm is fixed at the optimal angle. The horizontal thrust is decomposed into a vertically upward support force and a horizontal component force. The vertical component force acts directly on the sinking point in the middle of the workbench, which is more targeted. Since the maximum deformation of the workbench is concentrated in the middle, the compensation efficiency is the highest here. A large vertical support force can be obtained with a small hydraulic cylinder thrust, which is suitable for medium tonnage bending machines. The inclined design of the inclined support arm can also avoid interference with other structures on both sides. When the workbench sinks, it will be passively triggered by the sliding of the bottom of the inclined support arm. The sinking force pushes the bottom of the inclined support arm to slide, indirectly driving the hydraulic cylinder. At the same time, the hydraulic cylinder can actively output force to adjust the support strength, taking into account both rapid response to sudden deformation and active control of different working conditions. Attached Figure Description

[0016] Figure 1 This is an axonometric view of the side of this utility model;

[0017] Figure 2 This is an axonometric view of the front view of this utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged view of a portion of area A in the middle;

[0019] Figure 4 This is an axonometric view of the oblique support arm of this utility model from the front.

[0020] In the diagram: 1. Bending machine housing; 101. Bending machine slider; 102. Display screen; 2. Hydraulic tank; 201. Hydraulic cylinder; 202. Piston rod; 3. Workbench; 301. Bending die; 302. Support frame; 303. Mounting cavity; 304. Guide rail; 305. Connecting plate; 4. Angled support arm; 401. Sliding block; 402. Connector; 403. Limiting support; 404. Buffer pad. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0022] To address the issue that existing compensation structures are complex and unable to provide targeted compensation in practical applications, please refer to [the relevant documentation]. Figure 1 - Figure 4 This embodiment provides the following technical solution:

[0023] This embodiment of an electro-hydraulic bending machine stamping compensation structure includes a bending machine housing 1, a worktable 3 installed below the bending machine housing 1, hydraulic tanks 2 on both sides of the worktable 3, and a support frame 302 installed below the worktable 3. Two inclined support arms 4 are installed at the upper end of the support frame 302, and sliding blocks 401 are installed at the lower end of each of the two inclined support arms 4. Hydraulic cylinders 201 are installed on the outer side of each of the two sliding blocks 401. The two inclined support arms 4 are arranged in a "V" shape under the worktable 3. The top of the inclined support arms 4 is hinged to the lower end of the worktable 3, and the bottom of the inclined support arms 4 is slidably connected to the lower end of the worktable 3. Block 401 cooperates with the horizontal guide rail 304. The hydraulic cylinder 201 and piston rod 202 output horizontal thrust, thereby adjusting the horizontal position of the sliding block 401. When the bending machine slider 101 presses down, causing the middle of the worktable 3 to sink, the hydraulic cylinder 201 pushes the bottom of the inclined support arm 4 to slide outward along the horizontal guide rail. The tilt angle of the inclined support arm 4 increases, and the top support point is lifted upward. The vertical component force counteracts the sinking of the worktable 3. Conversely, if the force on the worktable 3 decreases, the hydraulic cylinder 201 pulls the bottom of the inclined support arm 4 to slide inward, and the top support point falls back, avoiding over-support.

[0024] A proportional valve is installed between the hydraulic tank 2 and the hydraulic cylinder 201. A piston rod 202 is installed at the front end of the hydraulic cylinder 201. The piston rod 202 is equipped with a displacement sensor, and the displacement sensor is connected to the proportional valve through a PLC module. With the closed-loop control of the displacement sensor and the proportional valve in the hydraulic tank 2, the dynamic response and force matching accuracy are further improved.

[0025] In fact, a guide rail 304 is installed on the upper end of the support frame 302. The sliding block 401 is horizontally slidably connected to the upper end of the support frame 302 through the guide rail 304. The lower end of the inclined support arm 4 is hinged to the sliding block 401. A connector 402 is installed on one end of the sliding block 401. The connector 402 is fixedly connected to the piston rod 202 through the positioning groove. The horizontal sliding of the inclined support arm 4 is converted into vertical support force, which can realize targeted compensation in the middle of the worktable. The structural principle is feasible and the cost is low.

[0026] Specifically, the two inclined support arms 4 are arranged in a "V" shape under the worktable 3. The tops of the inclined support arms 4 are hinged to the lower end of the worktable 3, and the bottoms of the inclined support arms 4 engage with the horizontal guide rail 304 via sliding blocks 401. The hydraulic cylinder 201 and piston rod 202 output horizontal thrust, thereby adjusting the horizontal position of the sliding blocks 401. When the bending machine slider 101 presses down, causing the middle of the worktable 3 to sink, the hydraulic cylinder 201 pushes the bottom of the inclined support arms 4 to slide outward along the horizontal guide rail. As the tilt angle increases, the top support point rises, offsetting the sinking of the worktable 3 through the vertical component force. Conversely, if the force on the worktable 3 decreases, the hydraulic cylinder 201 pulls the bottom of the inclined support arm 4 to slide inward, causing the top support point to fall back, thus avoiding over-support. The horizontal sliding of the inclined support arm 4 is converted into vertical support force, enabling targeted compensation in the middle of the worktable. The structural principle is feasible and the cost is low. Combined with the closed-loop control of the displacement sensor and proportional valve in the hydraulic tank 2, the dynamic response and force matching accuracy are further improved.

[0027] To address the issues of existing compensation structures being cumbersome, having limited installation locations, and being unsuitable for long-term use, please refer to... Figure 1 - Figure 4 This embodiment provides the following technical solution:

[0028] In this embodiment, a bending machine slider 101 is installed inside the bending machine housing 1. The position of the bending machine slider 101 corresponds to the position of the worktable 3. A display screen 102 is installed on one side of the bending machine housing 1. The display screen 102 displays the position information of the compensation structure and the pressure information of the bending die 301.

[0029] In addition, a bending die 301 is fixedly connected to the upper end of the workbench 3 by bolts. An integrally formed mounting cavity 303 is provided between the workbench 3 and the support frame 302. A compensation structure is provided in the mounting cavity 303 to save installation space and facilitate bending work.

[0030] It should be noted that a connecting plate 305 is fixedly connected to the bottom center of the workbench 3 by screws, and a limit support 403 is hinged to the upper end of the inclined support arm 4. The inclined design of the inclined support arm 4 can also avoid interference with other structures on both sides. When the workbench 3 sinks, it will be passively triggered by the sliding of the bottom of the inclined support arm 4. The sinking force pushes the bottom of the inclined support arm 4 to slide, indirectly driving the hydraulic cylinder 201. At the same time, the hydraulic cylinder 201 can actively output force to adjust the support strength, taking into account both rapid response to sudden deformation and active control of different working conditions. The limit support 403 is connected to the connecting plate 305 by fixing screws. A buffer pad 404 is installed between the connecting plate 305 and the limit support 403 to avoid indentation on the workbench surface caused by rigid contact, and at the same time absorb high-frequency vibration, which is beneficial for long-term use.

[0031] Specifically, the hydraulic cylinder 201 is arranged horizontally, which saves more longitudinal space compared to vertically arranged hydraulic cylinders, making it especially suitable for scenarios with narrow space at the bottom of the workbench. The angle of the inclined support arm 4 is fixed at the optimal angle, and the horizontal thrust is decomposed into a vertically upward support force and a horizontal component force. The vertical component force acts directly on the sinking point in the middle of the workbench, making it more targeted. Since the maximum deformation of the workbench is concentrated in the middle, the compensation efficiency is the highest here. A large vertical support force can be obtained with a small hydraulic cylinder thrust, which is suitable for medium-tonnage bending machines. The inclined design of the inclined support arm 4 can also avoid interference with other structures on both sides. When the workbench 3 sinks, it will be passively triggered by the sliding of the bottom of the inclined support arm 4. The sinking force pushes the bottom of the inclined support arm 4 to slide, indirectly driving the hydraulic cylinder 201. At the same time, the hydraulic cylinder 201 can actively output force to adjust the support strength, taking into account both rapid response to sudden deformation and active control of different working conditions. The installation of the buffer pad 404 can avoid the indentation on the workbench surface caused by rigid contact, and at the same time absorb high-frequency vibration, which is beneficial for long-term use.

[0032] Working Principle: During use, when the bending machine slider 101 presses down, causing the center of the worktable 3 to sink, the hydraulic cylinder 201 pushes the bottom of the inclined support arm 4 to slide outward along the horizontal guide rail. The tilt angle of the inclined support arm 4 increases, and the top support point rises upward. The vertical component force counteracts the sinking of the worktable 3. Conversely, if the force on the worktable 3 decreases, the hydraulic cylinder 201 pulls the bottom of the inclined support arm 4 to slide inward, and the top support point falls back, avoiding over-support. The horizontal sliding of the inclined support arm 4 is converted into vertical support force, which can achieve targeted compensation in the center of the worktable. The angle of the inclined support arm 4 is fixed at the optimal angle. The horizontal thrust is decomposed into a vertically upward support force and a horizontal component force. The vertical component force acts directly on the sinking point in the center of the worktable, making it more targeted, because the maximum deformation of the worktable is concentrated in the center. The compensation efficiency is highest here, and a large vertical support force can be obtained with a small hydraulic cylinder thrust, which is suitable for medium tonnage bending machines. The inclined design of the inclined support arm 4 can also avoid interference with other structures on both sides. When the worktable 3 sinks, it will be passively triggered by the sliding of the bottom of the inclined support arm 4. The sinking force pushes the bottom of the inclined support arm 4 to slide, indirectly driving the hydraulic cylinder 201. At the same time, the hydraulic cylinder 201 can actively output force to adjust the support strength, taking into account both rapid response to sudden deformation and active control of different working conditions. The installation of the buffer pad 404 can avoid the indentation on the worktable surface caused by rigid contact, and at the same time absorb high-frequency vibration, which is beneficial to long-term use. The structural principle is feasible and the cost is low. Combined with the closed-loop control of the displacement sensor and proportional valve in the hydraulic tank 2, the dynamic response and force matching accuracy are further improved.

[0033] 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 a process, method, article, or apparatus.

[0034] 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. An electro-hydraulic press brake press compensation structure comprising a press brake housing (1), characterized in that, A workbench (3) is installed below the housing (1) of the bending machine. Hydraulic tanks (2) are provided on both sides of the workbench (3). A support frame (302) is installed below the workbench (3). Two inclined arms (4) are installed at the upper end of the support frame (302). Sliding blocks (401) are installed at the lower end of the two inclined arms (4). Hydraulic cylinders (201) are installed on the outer side of the two sliding blocks (401).

2. The press compensation structure of an electro-hydraulic bending machine according to claim 1, characterized in that, A bending machine slider (101) is installed inside the bending machine housing (1). The position of the bending machine slider (101) corresponds to the position of the worktable (3). A display screen (102) is installed on one side of the bending machine housing (1).

3. The press compensation structure of an electro-hydraulic bending machine according to claim 1, characterized in that, A proportional valve is provided between the hydraulic tank (2) and the hydraulic cylinder (201). A piston rod (202) is installed at the front end of the hydraulic cylinder (201). The piston rod (202) is equipped with a displacement sensor, and the displacement sensor is connected to the proportional valve through a PLC module.

4. The press compensation structure of an electro-hydraulic bending machine according to claim 1, characterized in that, The upper end of the workbench (3) is fixedly connected to a bending mold (301) by bolts, and an integrally formed mounting cavity (303) is provided between the workbench (3) and the support frame (302).

5. The press compensation structure of an electro-hydraulic bending machine according to claim 1, characterized in that, The upper end face of the support frame (302) is equipped with a guide rail (304), and the sliding block (401) is horizontally slidably connected to the upper end of the support frame (302) through the guide rail (304).

6. The press compensation structure of an electro-hydraulic bending machine according to claim 1, characterized in that, A connecting plate (305) is fixedly connected to the bottom center of the workbench (3) by screws. A limit support (403) is hinged to the upper end of the inclined support arm (4). The limit support (403) is connected to the connecting plate (305) by fixing screws. A buffer pad (404) is installed between the connecting plate (305) and the limit support (403).

7. The press compensation structure of an electro-hydraulic bending machine according to claim 3, characterized in that, The lower end of the inclined support arm (4) is hinged to the sliding block (401). One end of the sliding block (401) is equipped with a connector (402), which is fixedly connected to the piston rod (202) through a positioning groove.

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