Angle correction mechanism for negative angle machining and correction method

Abstract

The invention discloses an angle correction mechanism for negative angle machining, and relates to the field of negative angle machining. The angle correction mechanism for negative angle machining comprises a fixed table, a recognition device, a first correction rod, a second correction rod, a first monitoring device, a mounting frame, a workpiece pushing claw and a conveying piece. According to the angle correction mechanism for negative angle machining, the structure that the first monitoring device is installed on the upper pressing die in the negative angle machining device is adopted, and before a workpiece is corrected, the static distances between the first monitoring straight groove and the second monitoring straight groove are obtained through the first displacement sensor and the second displacement sensor; in the negative angle forming process, the dynamic distance between a second displacement sensor and a second monitoring straight groove is obtained through the second displacement sensor, data are transmitted to a medium-pressure controller through a transmission piece, the medium-pressure controller processes and evaluates the data, whether the movable plate in the negative angle machining device drifts due to long-term use or not is judged, and the negative angle forming process is completed. The correction mechanism failure is effectively avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the field of negative angle machining, in particular to an angle correction mechanism for negative angle machining and a correction method. BACKGROUND

[0002] In modern manufacturing, negative angle machining is difficult and prone to deviation, and the angle correction mechanism for negative angle machining is born at the historic moment. With the help of sensors, it can monitor and accurately adjust the angle in real time, ensure the machining precision, and play an important role in the manufacturing field.

[0003] The angle correction mechanism in the existing negative angle machining device is mostly through manual placement of the workpiece to be machined on the device base, then the support plate is preliminarily positioned by the sliding groove and sliding block, the bending die head is folded to the preset angle, the clamping structure is fixed, and the deviation is measured and recorded by using precision instruments. According to the deviation, the die head or the support plate is adjusted, and the detection is repeated until the error is up to standard. This process can solve the angle deviation problem caused by workpiece deformation and device vibration in negative angle machining through the cooperation of mechanical positioning and digital detection.

[0004] However, the traditional correction mechanism has several significant defects: Firstly, before machining workpieces of different sizes, the traditional device needs a series of complex operations to adjust the correction mechanism, which requires higher technical requirements for workers and longer debugging time before machining. Secondly, the correction mechanism in the movable plate negative angle bending device only monitors and corrects the workpiece, but in the traditional movable plate negative angle bending device, the plates are mostly connected by rigid hinges or sliding guide rails, which are prone to angle drift due to wear and thermal deformation after long-term use. When this happens, even if the workpiece is corrected, it still cannot achieve accurate machining, which may lead to a batch of unqualified workpieces. SUMMARY

[0005] The purpose of the application is to provide an angle correction mechanism for negative angle machining to solve the problems raised in the background.

[0006] To achieve the above purpose, the application provides the following technical scheme: an angle correction mechanism for negative angle machining comprises: A fixed table is installed at the feeding end of the negative angle machining device, an identification device is arranged on the fixed table, the identification device is used to identify the size of the workpiece, and a first correction rod is arranged on the fixed table; A first monitoring device is arranged on the upper pressing die; The installation frame is slidably connected to the arc-shaped movable plate, the bottom of the installation frame is provided with a third driving element, a second correction rod is slidably connected in the installation frame, the first correction rod and the second correction rod are provided with a first driving element at the bottom, a fixed plate is fixedly connected in the installation frame, and a second monitoring device is arranged in the fixed plate, and the monitoring device is used for monitoring the angle of the workpiece. The workpiece pushing claw is slidably connected to the fixed table, and the bottom of the workpiece pushing claw is provided with a second driving element. The transmission element is arranged on the negative angle machining device.

[0007] The first driving element is used for driving the first correction rod and the second correction rod, and the first driving element comprises: A first servo motor is arranged on the side wall of the base of the negative angle machining device. One end of a double-threaded screw rod is fixedly connected to the output end of the first servo motor, and the double-threaded screw rod is rotatably connected in the base of the negative angle machining device. A first L-shaped connecting rod is slidably connected in the base of the negative angle machining device, and the upper end of the first L-shaped connecting rod is fixedly connected to the bottom of the first correction rod. A first high-precision nut is fixedly connected in the first L-shaped connecting rod, and the first high-precision nut is in threaded connection with the double-threaded screw rod.

[0008] The rear end of the first L-shaped connecting rod is fixedly connected with a first track main body, an adjusting rod is slidably connected in the first track main body, the upper end of the adjusting rod is movably clamped on the installation frame, the upper end of the adjusting rod is fixedly connected to the back of the second correction rod, the back of the base of the negative angle machining device is fixedly connected with a second track main body, an H-shaped adjusting element is slidably connected in the second track main body, the upper end of the H-shaped adjusting element is fixedly connected to the outer wall of the installation frame, the third driving element is an electric push rod, the base of the electric push rod is fixedly connected to the base of the negative angle machining device, and the output end of the electric push rod is fixedly connected to the H-shaped adjusting element.

[0009] A second L-shaped connecting rod is fixedly connected between the fixed table and the base of the negative angle machining device, a guide rod is fixedly connected between the second L-shaped connecting rod and the base of the negative angle machining device, and the second driving element comprises: A second servo motor is arranged on the side wall of the second L-shaped connecting rod. One end of a threaded rod is fixedly connected to the output end of the second servo motor, and the threaded rod is rotatably connected in the base of the negative angle machining device and the second L-shaped connecting rod. An adjusting plate is fixedly connected to the bottom of the workpiece pushing claw, and the adjusting plate is slidably connected to the guide rod. A second high-precision nut is fixedly connected in the adjusting plate, and the second high-precision nut is in threaded connection with the threaded rod.

[0010] The T-shaped movable plate is provided with a first monitoring straight slot, and the arc-shaped movable plate is provided with a second monitoring straight slot.

[0011] The transmission member comprises a transmission connector and a remote signal connector, the transmission connector is in communication connection with the detection element, the transmission connector is installed on the upper die side wall of the negative angle machining device, and the remote signal connector is installed on the transmission connector.

[0012] The second monitoring device is a pressure sensor, the pressure sensor is installed at the position close to the second correction rod of the fixed plate, a force transmission slider is movably clamped at the position corresponding to the pressure sensor in the mounting frame, and the monitoring end of the pressure sensor is opposite to the force transmission slider.

[0013] The identification device is a monitoring probe body, a gantry is fixedly connected to the fixed table, the monitoring probe body is installed on the gantry, and the monitoring end of the monitoring probe body is opposite to the fixed table.

[0014] The first monitoring device comprises a first displacement sensor and a second displacement sensor, the first displacement sensor is arranged at the position corresponding to the first monitoring straight slot in the bottom of the upper die of the negative angle machining device, and the second displacement sensor is arranged at the position corresponding to the second monitoring straight slot on the side wall of the upper die of the negative angle machining device.

[0015] A negative angle machining angle correction mechanism and a correction method, comprising the following steps: Step one, the external transmission mechanism transports the rectangular workpiece to be machined between the first correction rods of the fixed table, the size of the rectangular workpiece is identified by the monitoring probe body, data is transmitted to the central controller through the transmission member, at the same time, the displacement sensor detects the movable plate on the negative angle machining device, the displacement sensor monitors the distance between the displacement sensor and the monitoring straight slot on the movable plate, data is transmitted to the central controller through the transmission member, the central controller evaluates the data, if the static value of the displacement sensor is inconsistent with the standard value, it indicates that the angle drift is caused by wear and thermal deformation after long-term use of the movable plate, the central controller issues an alarm and displays a fault code, if the static value of the displacement sensor is consistent with the standard value, the next operation is performed. Step two, the central controller sends instructions to the driving part, first, the first servo motor drives the first correction rod and the second correction rod to move, so that the distance between the first correction rod and the second correction rod is equal to the length of the workpiece, then the output end of the electric push rod is elongated, the mounting frame is pushed to the arc movable plate, at the same time, the second servo motor drives the workpiece push jaw to push the workpiece to the bottom of the upper die, in the process of pushing the workpiece push jaw, the workpiece passes through the first correction rod and the second correction rod in turn, until the workpiece abuts against the force transmission slider, the two side pressure sensors transmit data to the central controller through the transmission part, the central controller evaluates the data, if the readings of the two pressure sensors are inconsistent, it indicates that the correction of the workpiece is not in place, the workpiece has an inclination angle, the central controller sends adjustment instructions to the driving part to correct the workpiece again, this process is repeated at most twice, if it still cannot meet the conditions, the central controller sends an alarm and displays the fault code, if the readings of the two pressure sensors are consistent, the next step is performed; Step three, after the correction is completed, the upper die presses the workpiece downward to form a specific angle negative angle, in the process of negative angle forming, the second displacement sensor monitors the distance between it and the second monitoring straight slot on the movable plate in real time, and transmits the data to the central controller through the transmission part, the central controller generates a broken line graph and evaluates the data, if the dynamic value of the second displacement sensor is inconsistent with the standard value, it indicates that the movable plate has angle drift due to wear and thermal deformation after long-term use, the central controller sends an alarm and displays the fault code, if the dynamic value of the second displacement sensor is consistent with the standard value, the negative angle processing of the workpiece is completed.

[0016] Technical effects and advantages of the invention: 1. The angle correction mechanism for negative angle processing automatically identifies the size of the rectangular workpiece through the monitoring probe body, and sends instructions to the driving part through the central controller to accurately drive the first correction rod, the second correction rod, the workpiece push jaw and the mounting frame to move, so as to correct the workpiece through the synergistic effect, achieve the purpose of automatically identifying and adapting to workpieces of different sizes, and quickly detect the angle of the workpiece through the pressure sensors on both sides of the fixed plate, on the one hand, reduce the operation difficulty of workers, on the other hand, shorten the debugging time of the correction mechanism.

[0017] 2. The angle correction mechanism for negative angle processing adopts the structure of installing the first monitoring device on the upper die in the negative angle processing device, the first monitoring device includes a first displacement sensor and a second displacement sensor, the static distance from the first monitoring device to the first monitoring straight slot and the second monitoring straight slot is obtained through the first displacement sensor and the second displacement sensor before correcting the workpiece, the dynamic distance from the first monitoring device to the second monitoring straight slot is obtained through the second displacement sensor in the negative angle forming process, the data is transmitted to the central controller through the transmission part, the central controller processes and evaluates the data to judge whether the movable plate in the negative angle processing device has angle drift due to long-term use, effectively avoiding the failure of workpiece correction. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the invention; Figure 2 A schematic diagram of the transmission component structure for the invention; Figure 3 A schematic diagram of the main structure of the monitoring probe for the invention; Figure 4 A schematic diagram of the workpiece pusher structure; Figure 5 A schematic diagram of the structure of the first servo motor of the invention; Figure 6 A schematic diagram of the structure of the H-shaped adjusting component; Figure 7 A schematic diagram of the pressure sensor structure for the invention; Figure 8 To develop a workpiece calibration flowchart; Figure 9 Flowchart for evaluating the invention of a central controller.

[0019] In the diagram: 1. Fixed table; 2. Gantry frame; 3. First monitoring straight groove; 4. Second monitoring straight groove; 5. First displacement sensor; 6. Second displacement sensor; 7. Transmission connector; 8. Remote signal connector; 9. Monitoring probe body; 10. First servo motor; 11. First L-shaped connecting rod; 12. Mounting frame; 13. Second L-shaped connecting rod; 14. Second servo motor; 15. Threaded rod; 16. Second high-precision nut; 17. Adjusting plate; 18. Guide rod; 19. Workpiece pusher; 20. First correction rod; 21. Double threaded screw; 22. First high-precision nut; 23. First track body; 24. Second track body; 25. H-shaped adjusting component; 26. Electric push rod; 27. Adjusting rod; 28. Second correction rod; 29. ​​Fixed plate; 30. Pressure sensor; 31. Force transmission slider. Detailed Implementation

[0020] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0021] The invention provides, for example Figure 1 - Figure 7 The angle correction mechanism for negative angle machining shown includes a fixed table 1, an identification device, a first correction rod 20, a second correction rod 28, a first monitoring device, a mounting frame 12, a workpiece pusher 19, and a transmission component.

[0022] The fixed table 1 is installed at the feed end of the negative angle processing device. The fixed table 1 is equipped with an identification device, and the monitoring probe body 9 serves as the identification device, which is used to automatically identify the size of the rectangular workpiece. After the monitoring probe body 9 obtains the workpiece size information, it transmits the data to the central controller through the transmission component to provide basic data for subsequent correction operations. The identification device is used to identify the workpiece size. The fixed table 1 is equipped with a first correction rod 20. The fixed table 1 serves as the initial placement platform for the entire angle correction mechanism, which is used to support the workpiece to be processed and to provide an installation base for other components. It is installed at the feed end of the negative angle processing device to facilitate the input of the workpiece. The surface of the fixed table 1 is flat and smooth, and it can withstand the placement of rectangular workpieces of different sizes.

[0023] The first monitoring device is installed on the upper pressure mold. The first monitoring device includes a first displacement sensor 5 and a second displacement sensor 6. Before the workpiece is corrected, the static distance from the workpiece to the first monitoring straight groove 3 and the second monitoring straight groove 4 is obtained through the first displacement sensor 5 and the second displacement sensor 6. During the negative angle forming process, the dynamic distance from the workpiece to the second monitoring straight groove 4 is obtained through the second displacement sensor 6. The data is transmitted to the intermediate pressure controller through the transmission component. The intermediate pressure controller processes and evaluates the data to determine whether the movable plate in the negative angle processing device has experienced angular drift due to long-term use, thus effectively preventing the correction mechanism from failing.

[0024] The mounting frame 12 is slidably connected to the arc-shaped movable plate. A third driving component is provided at the bottom of the mounting frame 12. A second correction rod 28 is slidably connected inside the mounting frame 12. A first driving component is installed at the bottom of the first correction rod 20 and the second correction rod 28. A fixing plate 29 is fixedly connected inside the mounting frame 12. A second monitoring device is provided inside the fixing plate 29. The monitoring device is used to monitor the workpiece angle. The first correction rod 20 and the second correction rod 28 cooperate to perform preliminary positioning and correction of the workpiece. Driven by the first driving component, the distance between the first correction rod 20 and the second correction rod 28 can be adjusted to accommodate workpieces of different sizes.

[0025] The workpiece pusher 19 is slidably connected to the fixed table 1. A second driving component is provided at the bottom of the workpiece pusher 19. The workpiece pusher 19 and the second driving component cooperate to stably push the workpiece. The transmission component is mounted on the negative angle processing device. The transmission connector 7 inside the transmission component is connected to the detection element for communication. The transmission component is used to transmit electrical signals to the central controller.

[0026] The first driving member is used to drive the first correction rod 20 and the second correction rod 28. The first driving member includes: The first servo motor 10 is mounted on the side wall of the base of the negative angle processing device; A double-threaded screw 21, one end of which is fixedly connected to the output end of the first servo motor 10, and the double-threaded screw 21 is rotatably connected to the base of the negative angle processing device. The first L-shaped connecting rod 11 is slidably connected to the base of the negative angle processing device, and the upper end of the first L-shaped connecting rod 11 is fixedly connected to the bottom of the first correction rod 20. The first high-precision nut 22 is fixedly connected inside the first L-shaped connecting rod 11, and the first high-precision nut 22 is threadedly connected to the double-threaded screw 21.

[0027] The first L-shaped connecting rod 11 is fixedly connected to the rear end of the first track body 23. An adjusting rod 27 is slidably connected inside the first track body 23. The upper end of the adjusting rod 27 is movably engaged with the mounting frame 12. The upper end of the adjusting rod 27 is fixedly connected to the back of the second correction rod 28. The back of the negative angle processing device base is fixedly connected to the second track body 24. An H-shaped adjusting component 25 is slidably connected inside the second track body 24. The upper end of the H-shaped adjusting component 25 is fixedly connected to the outer wall of the mounting frame 12. The third driving component is an electric push rod 26. The base of the electric push rod 26 is fixedly connected to the base of the negative angle processing device. The output end of the electric push rod 26 is fixedly connected to the H-shaped adjusting component 25.

[0028] A second L-shaped connecting rod 13 is fixedly connected between the fixed table 1 and the base of the negative angle processing device. A guide rod 18 is fixedly connected between the second L-shaped connecting rod 13 and the base of the negative angle processing device. The second driving component includes: The second servo motor 14 is mounted on the side wall of the second L-shaped connecting rod 13; The threaded rod 15 has one end fixedly connected to the output end of the second servo motor 14, and the threaded rod 15 is rotatably connected to the base of the negative angle processing device and the second L-shaped connecting rod 13. Adjusting plate 17 is fixedly connected to the bottom of workpiece pusher 19, and adjusting plate 17 is slidably connected to guide rod 18; The second high-precision nut 16 is fixedly connected inside the adjusting plate 17, and the second high-precision nut 16 is threadedly connected to the threaded rod 15.

[0029] The T-shaped movable plate is equipped with a first monitoring straight groove 3, and the arc-shaped movable plate is equipped with a second monitoring straight groove 4.

[0030] The transmission component includes a transmission connector 7 and a remote signal connector 8. The transmission connector 7 is communicatively connected to the detection element. The transmission connector 7 is installed on the upper mold side wall of the negative angle processing device, and the remote signal connector 8 is installed on the transmission connector 7.

[0031] The second monitoring device is a pressure sensor 30, which is installed on the fixed plate 29 near the second correction rod 28. A force transmission slider 31 is movably engaged in the mounting frame 12 at the position corresponding to the pressure sensor 30, and the monitoring end of the pressure sensor 30 is directly opposite the force transmission slider 31.

[0032] The identification device is a monitoring probe body 9. A gantry frame 2 is fixedly connected to the fixed table 1. The monitoring probe body 9 is installed on the gantry frame 2. The gantry frame 2 is used to install the monitoring probe body 9 and provides a stable support structure for the monitoring probe body 9, so that it can accurately identify the size of the workpiece on the fixed table 1. The monitoring end of the monitoring probe body 9 is facing the fixed table 1.

[0033] The first monitoring device includes a first displacement sensor 5 and a second displacement sensor 6. The first displacement sensor 5 is located at the bottom of the upper mold of the negative angle processing device, corresponding to the position of the first monitoring straight groove 3. The second displacement sensor 6 is located on the side wall of the upper mold of the negative angle processing device, corresponding to the position of the second monitoring straight groove 4.

[0034] Figure 8 and Figure 9 The diagram shows the correction steps of an angle correction mechanism for negative angle machining: Step 1: The external transmission mechanism transports the rectangular workpiece to be processed to the first correction rod 20 of the fixed table 1. The size of the rectangular workpiece is identified by the monitoring probe body 9, and the data is transmitted to the central controller through the transmission component. At the same time, the displacement sensor detects the movable plate on the negative angle processing device. The displacement sensor monitors the distance between itself and the monitoring straight groove on the movable plate, and transmits the data to the central controller through the transmission component. The central controller evaluates the data. If the static value of the displacement sensor is inconsistent with the standard value, it indicates that the movable plate has caused angular drift due to wear and thermal deformation after long-term use. The central controller issues an alarm and displays a fault code. If the static value of the displacement sensor is consistent with the standard value, the next step is performed. Step 2: The central controller sends instructions to the drive unit. First, the first servo motor 10 drives the first correction rod 20 and the second correction rod 28 to move, so that the distance between the first correction rod 20 and the second correction rod 28 is equal to the length of the workpiece. Then, the output end of the electric push rod 26 extends, pushing the mounting frame 12 horizontally onto the arc-shaped movable plate. At the same time, the second servo motor 14 drives the workpiece pusher 19 to push the workpiece horizontally to the bottom of the upper mold. During the pushing process of the workpiece pusher 19, the workpiece passes through the first correction rod 20 and the second correction rod 28 in sequence until the workpiece abuts against the force transmission slider 31. The pressure sensors 30 on both sides transmit the data to the central controller through the transmission unit. The central controller evaluates the data. If the readings of the two pressure sensors 30 are inconsistent, it indicates that the workpiece correction is not in place and the workpiece has a tilt angle. The central controller sends an adjustment instruction to the drive unit to perform a second correction on the workpiece. This process is repeated a maximum of two times. If the conditions are still not met, the central controller issues an alarm and displays a fault code. If the readings of the two pressure sensors 30 are consistent, the next step is performed. Step 3: After calibration, the upper die presses the workpiece downwards to form a negative angle. During the negative angle forming process, the second displacement sensor 6 monitors the distance between itself and the second monitoring groove 4 on the movable plate in real time. The data is transmitted to the central controller through the transmission component. The central controller generates a line graph of the data and evaluates it. If the dynamic value of the second displacement sensor 6 is inconsistent with the standard value, it indicates that the movable plate has experienced angular drift due to wear and thermal deformation after long-term use. The central controller issues an alarm and displays a fault code. If the dynamic value of the second displacement sensor 6 is consistent with the standard value, the negative angle processing of the workpiece is completed.

[0035] Example 1: In the angle correction mechanism for negative angle machining, the correction process of the correction rods is tight and orderly. First, the external transmission mechanism transports the rectangular workpiece to be processed to the first correction rod 20 on the fixed table 1. At this time, the monitoring probe body 9 installed on the gantry 2 begins to identify and accurately identify the size of the rectangular workpiece. The data is then transmitted to the central controller through the transmission component. Next, the central controller sends a command to the drive component, and the first servo motor 10 starts, driving the double-threaded screw 21 to rotate. The first high-precision nut 22, which is threadedly connected to the double-threaded screw 21, moves accordingly, thereby driving the first... The L-shaped connecting rod 11 slides within the base of the negative angle processing device, causing the first correction rod 20 and the second correction rod 28 to move until the distance between them equals the length of the workpiece. Subsequently, the output end of the electric push rod 26 extends, pushing the H-shaped adjusting member 25 to slide within the second track body 24, thereby pushing the mounting frame 12 flat onto the arc-shaped movable plate. At the same time, the second servo motor 14 starts, driving the threaded rod 15 to rotate. The second high-precision nut 16, which is threadedly connected to the threaded rod 15, moves, causing the adjusting plate 17 to slide along the guide rod 18, thereby driving the workpiece pusher 19 to push the workpiece flat to the bottom of the upper die.

[0036] During the pushing process of the workpiece pusher 19, the workpiece passes through the first correction rod 20 and the second correction rod 28 in sequence until it comes into contact with the force transmission slider 31. At this time, the pressure sensor 30 installed on the fixed plate 29 near the second correction rod 28 starts to work. Its monitoring end is directly facing the force transmission slider 31. The pressure sensors 30 on both sides transmit the data to the central controller through the transmission component. The central controller evaluates the pressure data. If the readings of the two pressure sensors 30 are inconsistent, it indicates that the workpiece correction is not in place and there is a tilt angle. The central controller issues an adjustment command to the drive component to perform a second correction on the workpiece. This process is repeated a maximum of two times. If the conditions still cannot be met, the central controller issues an alarm and displays a fault code. If the readings of the two pressure sensors 30 are consistent, the next step is performed. After the final correction is completed, the upper die presses the workpiece down to form a negative angle, thus completing the negative angle processing of the workpiece.

[0037] Example 2: In the initial stage, the first displacement sensor 5 and the second displacement sensor 6 in the first monitoring device detect the movable plate on the negative angle processing device. The first displacement sensor 5 is located at the bottom of the upper mold of the negative angle processing device, corresponding to the position of the first monitoring straight groove 3. The second displacement sensor 6 is located on the side wall of the upper mold, corresponding to the position of the second monitoring straight groove 4. They monitor the distance between themselves and the monitoring straight groove on the movable plate and transmit the data to the central controller via a transmission device. The central controller evaluates the data from the displacement sensors. If the static value is inconsistent with the standard value, it indicates that the movable plate has experienced wear, thermal deformation, etc., due to long-term use, resulting in angular drift. The central controller issues an alarm and displays a fault code to remind the operator to handle the problem in time and avoid errors in subsequent processing due to problems with the movable plate. If the static value is consistent with the standard value, the next step of operation is performed.

[0038] During the negative angle forming process, the second displacement sensor 6 continues to play a dynamic monitoring role. It monitors the distance between itself and the second monitoring groove 4 on the movable plate in real time and continuously transmits the dynamic data to the central controller through the transmission component. The central controller processes this dynamic data, generates a line graph, and performs a detailed evaluation. If the dynamic value of the second displacement sensor 6 is inconsistent with the standard value, it indicates that the movable plate has drifted in angle due to factors such as wear and thermal deformation during the negative angle forming process. The central controller will also issue an alarm and display a fault code so that the operator can adjust the equipment or take other measures in time to ensure the quality and accuracy of the negative angle processing. Through this monitoring method that combines static and dynamic monitoring, the monitoring device can comprehensively and timely grasp the status of the movable plate of the negative angle processing device, providing a strong guarantee for the stable operation of the entire processing process, effectively avoiding problems such as the failure of the correction mechanism caused by the angle drift of the movable plate, and ensuring that the produced workpieces meet the quality requirements.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the invention and is not intended to limit the invention. Although the 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 invention should be included within the protection scope of the invention.

Claims

1. An angle correction mechanism for negative angle machining, characterized in that, The utility model relates to a negative angle machining device, including: A fixed table (1) is installed at the feeding end of the negative angle machining device, the fixed table (1) is provided with an identification device for identifying the size of a workpiece, and the fixed table (1) is provided with a first correction rod (20); A first monitoring device is arranged on the upper die; An installation frame (12) is slidably connected to the arc-shaped movable plate, the bottom of the installation frame (12) is provided with a third driving member, a second correction rod (28) is slidably connected in the installation frame (12), the first correction rod (20) and the second correction rod (28) are provided at the bottom with a first driving member, a fixed plate (29) is fixedly connected in the installation frame (12), and the fixed plate (29) is provided with a second monitoring device; A workpiece pushing claw (19) is slidably connected to the fixed table (1), and the bottom of the workpiece pushing claw (19) is provided with a second driving member; A transmission member is arranged on the negative angle machining device.

2. The angle correction mechanism for negative angle machining according to claim 1, characterized by The first driving member is used for driving the first correction rod (20) and the second correction rod (28), and the first driving member comprises: A first servo motor (10) is installed on the side wall of the base of the negative angle machining device; A double-thread screw rod (21) is fixedly connected at one end to the output end of the first servo motor (10) and is rotatably connected in the base of the negative angle machining device; A first L-shaped connecting rod (11) is slidably connected in the base of the negative angle machining device, and the upper end of the first L-shaped connecting rod (11) is fixedly connected to the bottom of the first correction rod (20); A first high-precision nut (22) is fixedly connected in the first L-shaped connecting rod (11), and the first high-precision nut (22) is in threaded connection with the double-thread screw rod (21).

3. The angle correction mechanism for negative angle machining according to claim 2, characterized by The rear end of the first L-shaped connecting rod (11) is fixedly connected with a first track main body (23), the first track main body (23) is slidably connected with an adjusting rod (27), the upper end of the adjusting rod (27) is movably clamped to the installation frame (12), the upper end of the adjusting rod (27) is fixedly connected to the back of the second correction rod (28), the back of the base of the negative angle machining device is fixedly connected with a second track main body (24), the second track main body (24) is slidably connected with an H-shaped adjusting member (25), the upper end of the H-shaped adjusting member (25) is fixedly connected to the outer wall of the installation frame (12), the third driving member is an electric push rod (26), the base of the electric push rod (26) is fixedly connected to the base of the negative angle machining device, and the output end of the electric push rod (26) is fixedly connected to the H-shaped adjusting member (25).

4. The angle correction mechanism for negative angle machining according to claim 1, characterized by The second L-shaped connecting rod (13) is fixedly connected between the fixed table (1) and the base of the negative angle machining device, a guide rod (18) is fixedly connected between the second L-shaped connecting rod (13) and the base of the negative angle machining device, and the second driving member comprises: A second servo motor (14) is installed on the side wall of the second L-shaped connecting rod (13). Threaded rod (15), one end is fixedly connected to the second servo motor (14) output end, the threaded rod (15) rotationally connected to the negative angle machining device base and the second L-shaped connecting rod (13) in; Adjusting plate (17), which is fixedly connected to the workpiece push jaw (19) bottom, the adjusting plate (17) is slidingly connected to the guide rod (18); Second high-precision nut (16), which is fixedly connected to the adjusting plate (17), the second high-precision nut (16) is threadedly connected with the threaded rod (15).

5. The angle correction mechanism for negative angle machining according to claim 1, characterized by The T-shaped movable plate is provided with a first monitoring straight groove (3), and the arc-shaped movable plate is provided with a second monitoring straight groove (4).

6. The angle correction mechanism for negative angle machining according to claim 1, characterized by The transmission member includes a transmission connector (7) and a remote signal connector (8), the transmission connector (7) is in communication connection with the detection element, the transmission connector (7) is installed on the upper die sidewall of the negative angle machining device, and the remote signal connector (8) is installed on the transmission connector (7).

7. The angle correction mechanism for negative angle machining according to claim 1, characterized by The second monitoring device is a pressure sensor (30), the pressure sensor (30) is installed at a position close to the second correction rod (28) of the fixed plate (29), a force transmission slider (31) is movably clamped at a position corresponding to the pressure sensor (30) in the mounting frame (12), and the monitoring end of the pressure sensor (30) is opposite to the force transmission slider (31).

8. The angle correction mechanism for negative angle machining according to claim 1, characterized by The identification device is a monitoring probe body (9), the fixed table (1) is fixedly connected with a gantry (2), the monitoring probe body (9) is installed on the gantry (2), and the monitoring end of the monitoring probe body (9) is opposite to the fixed table (1).

9. The angle correction mechanism for negative angle machining according to claim 5, characterized by The first monitoring device includes a first displacement sensor (5) and a second displacement sensor (6), the first displacement sensor (5) is arranged at a position corresponding to the first monitoring straight groove (3) in the bottom of the upper die of the negative angle machining device, and the second displacement sensor (6) is arranged at a position corresponding to the second monitoring straight groove (4) on the sidewall of the upper die of the negative angle machining device.

10. A correction method of the angle correction mechanism for negative angle machining according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: Step one, the external transmission mechanism transports the rectangular workpiece to be processed between the first correction rod (20) of the fixed table (1), the size of the rectangular workpiece is identified through the monitoring probe body (9), data is transmitted to the central controller through the transmission member, at the same time, the displacement sensor detects the movable plate on the negative angle machining device, the distance between the displacement sensor and the monitoring straight groove on the movable plate is monitored, data is transmitted to the central controller through the transmission member, the central controller evaluates the data, if the static value of the displacement sensor is inconsistent with the standard value, it indicates that the angle drift is caused by wear and thermal deformation after long-term use of the movable plate, the central controller issues an alarm and displays the fault code, if the static value of the displacement sensor is consistent with the standard value, the next operation is performed. Step 2: The central controller sends instructions to the drive components. First, the first servo motor (10) drives the first correction rod (20) and the second correction rod (28) to move, so that the distance between the first correction rod (20) and the second correction rod (28) is equal to the length of the workpiece. Then, the output end of the electric push rod (26) extends, pushing the mounting frame (12) flat onto the arc-shaped movable plate. At the same time, the second servo motor (14) drives the workpiece pusher (19) to push the workpiece flat to the bottom of the upper die. During the pushing process of the workpiece pusher (19), the workpiece passes through the first correction rod (20) and the second correction rod (28) in sequence. The rod (28) is moved until the workpiece comes into contact with the force transmission slider (31). The pressure sensors (30) on both sides transmit the data to the central controller through the transmission component. The central controller evaluates the data. If the readings of the two pressure sensors (30) are inconsistent, it indicates that the workpiece correction process is not in place and the workpiece has a tilt angle. The central controller issues an adjustment command to the drive component to perform a second correction on the workpiece. This process is repeated at most twice. If the conditions are still not met, the central controller issues an alarm and displays a fault code. If the readings of the two pressure sensors (30) are consistent, the next step is performed. Step 3: After the correction is completed, the upper pressure mold presses the workpiece down to form a negative angle at a specific angle. During the negative angle forming process, the second displacement sensor (6) monitors the distance between itself and the second monitoring straight groove (4) on the movable plate in real time. The data is transmitted to the central controller through the transmission component. The central controller generates a line graph of the data and evaluates it. If the dynamic value of the second displacement sensor (6) is inconsistent with the standard value, it indicates that the movable plate has caused angular drift due to wear and thermal deformation after long-term use. The central controller issues an alarm and displays a fault code. If the dynamic value of the second displacement sensor (6) is consistent with the standard value, the negative angle processing of the workpiece is completed.

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