Forming angle detection device for bending machine

Abstract

The utility model belongs to the technical field of bending machine, concretely relates to a forming angle detection device for bending machine. Include: work table, two linear guides, parallel arrangement in the both sides of work table, at least one detection device, install on linear guide through sliding block, the detection device includes the sensor body for emitting detection light beam and receiving feedback, driving device, install on work table, with Detection device is connected, is used for driving detection device moves along linear guide, control system with driving device and sensor body electric connection is used for receiving sensor's detection data and controls driving device's action. The utility model provides a forming angle detection device for bending machine, can significantly improve the first piece bending qualified rate, avoids repeatedly trying to fold, artificial measurement and parameter adjustment in traditional mode to cause time and material waste, thereby greatly improves production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of bending machine technology, specifically relating to a forming angle detection device for bending machines. Background Technology

[0002] In sheet metal processing, bending machines are crucial equipment used to bend flat metal into specific angles using dies. In actual production, especially when bending the first workpiece, multiple steps are typically required, including trial bending, angle measurement, and parameter adjustments, to ensure the bending angle meets design requirements. This process not only consumes significant manpower and time but is also prone to human error, leading to defective workpieces and impacting production efficiency and product quality.

[0003] Furthermore, the mechanical properties of materials from different batches vary. Changes in parameters such as elastic modulus and yield strength directly lead to inconsistent springback after bending, causing fluctuations in the forming angle and potentially exceeding tolerances. During mass production, if each workpiece cannot be inspected in real time, it is difficult to detect angle deviations promptly, potentially resulting in continuous scrap and wasting materials and time.

[0004] Especially in automated production lines integrating bending machines and industrial robots, the requirements for the stability and consistency of bending angles are even higher. Current technology lacks a device capable of real-time online detection, automatic feedback, and correction of angles, limiting the efficiency and yield of automated production. Therefore, there is an urgent need for a device that can be integrated into a bending machine system to achieve automatic angle detection and compensation, thereby improving the accuracy and automation level of bending processes. Utility Model Content

[0005] The purpose of this invention is to provide a forming angle detection device and correction method for a bending machine to solve the problems existing in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a forming angle detection device for a bending machine, comprising: Workbench; Two linear guide rails are arranged in parallel on both sides of the worktable; At least one detection device is mounted on the linear guide rail via a slider, the detection device including a sensor body for emitting a detection beam and receiving feedback; A drive unit, mounted on the workbench and connected to the detection device, is used to drive the detection device to move along the linear guide rail; A control system, electrically connected to the drive device and the sensor body, is used to receive detection data from the sensor and control the operation of the drive device. The control system is configured to: after the bending machine slide is pressed down, control the detection device to move to the underside of the bent workpiece to detect the angle, and control the bending machine slide to press down again based on the detected springback angle data to correct the forming angle.

[0007] Preferably, there are two detection devices, symmetrically arranged on both sides of the worktable, used to detect the two sides of the workpiece bending respectively.

[0008] Preferably, the detection device further includes a horizontal axis adjustment block and a vertical axis adjustment block, and the sensor body is mounted through the horizontal axis adjustment block and the vertical axis adjustment block to adjust the projection angle of the sensor beam in the horizontal and vertical directions, so as to achieve alignment of the sensor beams on both sides.

[0009] Preferably, the driving device includes: Electric motor; A drive shaft is connected to the output end of the motor; An active pulley is mounted on the drive shaft; The driven pulley is mounted on the worktable via a tensioning device; A timing belt is fitted onto the driving pulley and the driven pulley; The detection device is fixedly connected to the synchronous belt.

[0010] Preferably, the device also includes a cable chain and a protective cover, the cable chain being used to house cables that power the detection device and transmit data, and the protective cover being disposed outside the linear guide and the cable chain.

[0011] Preferably, the two ends of the workbench are provided with anti-collision blocks to limit the movement of the detection device.

[0012] Preferably, the control system is further configured to: monitor the torque of the driving device in real time when driving the detection device to move, and cut off the power output to achieve collision protection when the resistance exceeds a preset threshold.

[0013] Preferably, the sensor body is a laser angle sensor, which emits a linear laser beam to the surface of the workpiece and receives the reflected light through a camera to calculate the angle.

[0014] The beneficial effects of this utility model are as follows: The forming angle detection device for bending machines provided by this utility model can significantly improve the first-piece bending pass rate, avoid the time and material waste caused by repeated trial bending, manual measurement and parameter adjustment in the traditional method, thereby greatly improving production efficiency. This device, by detecting the forming angle in real time and providing automatic feedback, enables the bending machine to have the ability to identify and compensate for springback online, effectively ensuring the consistency and stability of workpiece angles in mass production.

[0015] Furthermore, this device achieves automated closed-loop control for bending angle detection and correction, greatly reducing reliance on operator experience and enabling seamless integration into automated production lines. When material properties fluctuate, the system can autonomously adjust bending parameters, continuously outputting qualified products without interrupting production, significantly improving the automation level, production flexibility, and overall efficiency of bending processes. Attached Figure Description

[0016] Figure 1 This is an isometric schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the detection device in this utility model; Figure 3 This is a schematic diagram of the drive device in this utility model; Figure 4 This is a flowchart of the present invention; Figure 5 This is a diagram of the bending process in this utility model. Detailed Implementation

[0017] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0018] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] The core of this utility model is a forming angle detection device for a bending machine, which uses a movable detection unit to detect the bending angle in real time and automatically corrects it based on springback data, thereby ensuring the accuracy and stability of the forming angle.

[0022] Reference Figure 1 The device mainly includes a drive unit 1, a detection device 2, a worktable 3, linear guide rails 4, a cable chain 5, a protective cover 6, and anti-collision blocks 7. The worktable 3 is fixedly mounted on the bending machine, with two high-precision linear guide rails 4 installed parallel to each other on both sides. The detection device 2 is fixed to the slider of the linear guide rails 4 via a connecting plate 22 at its bottom, allowing the detection device 2 to slide precisely along the guide rails. The drive unit 1 is fixedly mounted on the worktable 3, and its output end is connected to the detection device 2, providing power for its movement. The travel distance of the detection device 2 is mechanically limited by anti-collision blocks 7 installed at both ends of the worktable 3 to prevent overtravel collisions. The fixed end of the cable chain 5 is connected to the protective cover 6, and its moving end is connected to the detection device 2. The cable chain 5 houses and provides power and data transmission to the detection device 2. The entire linear guide rail 4, cable chain 5, and most of the drive unit 1 are covered by the protective cover 6, effectively preventing dust, chips, and other foreign objects from the processing environment from entering and causing damage, thus improving the reliability and service life of the equipment.

[0023] Reference Figure 2 The detection device 2 consists of a clamping plate 21, a connecting plate 22, a horizontal axis adjusting block 23, a vertical axis adjusting block 24, a sensor protective cover 25, and a sensor body 26. The clamping plate 21 is used for fixed connection with the synchronous belt 15 of the drive device 1. The sensor body 26 (preferably a laser angle sensor) is mounted on the overall structure via the vertical axis adjusting block 24 and the horizontal axis adjusting block 23. By turning the adjusting screw on the horizontal axis adjusting block 23, the sensor 26 can be finely adjusted around the horizontal axis; by turning the adjusting screw on the vertical axis adjusting block 24, the sensor 26 can be finely adjusted around the vertical axis. Through these two sets of adjustment mechanisms, the sensor beams of the two detection devices 2 can be accurately calibrated, ensuring that the emitted linear laser can be accurately projected onto a specific position on the bent edge of the workpiece and aligned with each other, which is a prerequisite for obtaining accurate angle measurement results. The sensor protective cover 25 plays a crucial protective role for the sensor body 26.

[0024] Reference Figure 3The drive unit 1 consists of a motor 11, a drive support 12, a drive pulley 13, a drive shaft 14, a synchronous belt 15, a driven pulley 16, and a tensioning device 17. The drive support 12 and the tensioning device 17 are fixed to both ends of the worktable 3. The drive shaft 14 is supported by a bearing housing and passes through the drive support 12. The motor 11 (preferably a servo motor) is mounted on the drive support 12, and its output shaft is connected to the drive shaft 14 via a coupling. Two drive pulleys 13 are fixedly mounted on both sides of the drive shaft 14 to achieve synchronous rotation. The driven pulley 16 is mounted on the shaft of the tensioning device 17. The synchronous belt 15 wraps around the drive pulleys 13 and 16. The tensioning device 17 can be used to adjust the tension of the synchronous belt 15, prevent slippage, and ensure transmission accuracy. The clamping plate 21 of the detection device 2 is fixedly connected to the synchronous belt 15. Therefore, when the motor 11 rotates, the detection devices 2 on both sides can be driven to move synchronously towards or away from each other through the synchronous belt 15.

[0025] Work process: like Figure 4 and Figure 5 As shown, when the bending machine starts working, the control system, according to the bending position set in the program, controls the motor 11 to drive the detection device 2 to move to the predetermined measuring position on the worktable 3. The upper slide of the bending machine drives the upper die to press down, completing the first bend. Subsequently, the upper slide slightly returns to its starting position, and the workpiece springs back. At this time, the detection devices 2 on both sides are activated, and the sensor body 26 emits a laser towards the bending edge of the workpiece and receives the reflected light, quickly calculating the actual angle of the workpiece after springback and feeding the data back to the control system in real time. The control system compares the measured angle with the target angle and calculates the required pressing depth compensation value to compensate for the springback. Subsequently, the control system instructs the upper slide of the bending machine to press down again for a second precision bend. The pressing depth this time is precisely adjusted based on the compensation value, thereby effectively correcting the angle deviation caused by material springback, and finally obtaining a workpiece with a qualified angle. After the bending is completed, the detection device 2 can be driven to a safe position outside the worktable 3 to avoid interfering with the handling or subsequent processing of the workpiece.

[0026] Furthermore, during the movement of the detection device 2, the control system monitors the output torque of the motor 11 in real time. If an unexpected obstacle (such as an operator or workpiece) is encountered on the movement path, the resistance will increase the motor torque. When the torque exceeds the safety threshold set by the system, the control system will immediately cut off the motor power and trigger an emergency stop, thereby effectively protecting the safety of personnel and equipment.

[0027] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A forming angle detection device for a bending machine, characterized in that, include: Workbench (3); Two linear guide rails (4) are arranged in parallel on both sides of the worktable (3); At least one detection device (2) is mounted on the linear guide rail (4) by a slider. The detection device (2) includes a sensor body (26) for emitting a detection beam and receiving feedback. A drive device (1) is installed on the workbench (3) and connected to the detection device (2) to drive the detection device (2) to move along the linear guide rail (4); The control system is electrically connected to the drive device (1) and the sensor body (26) for receiving the detection data of the sensor and controlling the operation of the drive device (1). The control system is configured to: after the bending machine slider is pressed down, control the detection device (2) to move to the bottom of the bending workpiece to detect the angle, and control the bending machine slider to press down again according to the detected springback angle data to correct the forming angle.

2. The forming angle detection device for a bending machine according to claim 1, characterized in that, The number of the detection devices (2) is two, which are symmetrically arranged on both sides of the workbench (3) to detect the two sides of the workpiece bending respectively.

3. The forming angle detection device for a bending machine according to claim 2, characterized in that, The detection device (2) further includes a horizontal axis adjustment block (23) and a vertical axis adjustment block (24). The sensor body (26) is installed through the horizontal axis adjustment block (23) and the vertical axis adjustment block (24) to adjust the projection angle of the sensor beam in the horizontal and vertical directions, so as to achieve the alignment of the sensor beams on both sides.

4. The forming angle detection device for a bending machine according to claim 1, characterized in that, The driving device (1) includes: Motor (11); The drive shaft (14) is connected to the output end of the motor (11); The drive pulley (13) is mounted on the drive shaft (14); The driven pulley (16) is mounted on the worktable (3) via a tensioning device (17); A synchronous belt (15) is fitted onto the driving pulley (13) and the driven pulley (16); The detection device (2) is fixedly connected to the synchronous belt (15).

5. The forming angle detection device for a bending machine according to claim 1, characterized in that, It also includes a cable chain (5) and a cover (6), the cable chain (5) being used to house the cables that power the detection device (2) and transmit data, and the cover (6) being placed over the linear guide (4) and the cable chain (5).

6. The forming angle detection device for a bending machine according to claim 1, characterized in that, The workbench (3) is provided with anti-collision blocks (7) at both ends to limit the movement of the detection device (2).

7. The forming angle detection device for a bending machine according to claim 1, characterized in that, The control system is also configured to: monitor the torque of the driving device in real time when driving the detection device (2) to move, and cut off the power output to achieve collision protection when the resistance exceeds a preset threshold.

8. The forming angle detection device for a bending machine according to claim 1, characterized in that, The sensor body (26) is a laser angle sensor, which emits a linear laser beam to the surface of the workpiece and receives the reflected light through a camera to calculate the angle.

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