A roll position detecting device for a four-high plate rolling mill

Abstract

The utility model relates to the technical field of plate rolling machine, and disclose a four roller plate rolling machine's roller position detection device, including frame and side roller, both ends of two groups of side roller all are installed with connecting piece, the surface of four groups connecting piece all rotatoryly connects with detection mechanism. This four roller plate rolling machine's roller position detection device, through the setting of detection mechanism and synchronous mechanism, when hydraulic rod drive connecting piece swing to adjust side roller position, connecting piece drive both ends connecting rod movement, the displacement of side roller is converted into the linear motion of two groups of sliders, the rack on the slider drives the gear rotation, and the same shaft encoder converts the corner into the electric signal, and the displacement amount of side roller is monitored in real time to the external control box, at the same time, two sliders are connected through the same screw rod with positive screw thread and reverse screw thread, if the displacement of both ends of side roller is synchronous, the screw rod keeps stationary, if the position deviation appears at both ends, the opposite screw thread will drive the screw rod to rotate.

Description

Technical Field

[0001] This utility model relates to the field of plate rolling machine technology, and in particular to a roller position detection device for a four-roll plate rolling machine. Background Technology

[0002] A four-roll plate bending machine is a key industrial piece of equipment used to bend metal sheets into circular, arc-shaped, or conical workpieces. Its core structure consists of four high-strength rollers arranged symmetrically: two fixed side rollers at the bottom, one active main roller at the top, and one side roller with precise displacement adjustment. Through the rotational drive of the main roller and the coordinated bending action of the side rollers, the metal sheet continuously passes between the rollers, gradually undergoing plastic deformation and ultimately forming a preset curvature.

[0003] Currently, the detection sensors of four-roll plate bending machines are directly installed on the hydraulic rods or rotating shafts. They are easily contaminated or damaged due to long-term exposure to oil and metal debris, leading to inaccurate measurements. At the same time, due to the mechanical linkage error between the extension and retraction of the hydraulic rod and the rotation of the connecting parts, monitoring only a single parameter cannot truly reflect the final position of the roller, and the accuracy is difficult to guarantee. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a roller position detection device for a four-roll plate bending machine, which solves the problems mentioned in the background art. Currently, the detection sensors of four-roll plate bending machines are directly installed on hydraulic rods or rotating shafts, which are easily contaminated or damaged by long-term exposure to oil and metal debris, leading to inaccurate measurements. At the same time, due to the mechanical linkage error between the extension and retraction of the hydraulic rod and the rotation of the connecting parts, monitoring only a single parameter cannot truly reflect the final position of the roller, and the accuracy is difficult to guarantee.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a roller position detection device for a four-roll plate bending machine, comprising a frame and side rollers. Connectors are installed at both ends of the two sets of side rollers. Detection mechanisms are rotatably connected to the surfaces of all four sets of connectors. A screw is provided below each of the two sets of side rollers. A synchronization mechanism is installed in the middle of the surface of the screw. The detection mechanism includes a connecting rod rotatably connected to the surface of the connector. A slider is rotatably connected to one end of the connecting rod. A rack is fixedly connected to the front of the slider. A gear is meshed with one side of the rack. An encoder is fixedly connected to the center of the left side of the gear. The synchronization mechanism includes a differential transformer installed in the middle of the surface of the screw. A positive thread is provided on the left side of the screw, and a positive thread seat is meshed with the surface of the positive thread. A negative thread is provided on the right side of the screw, and a negative thread seat is meshed with the surface of the negative thread.

[0008] As a further embodiment of this utility model, four sets of sliding cavities are symmetrically opened on the inner side wall of the frame. The frame is provided with scale lines on one side of the sliding cavities. Protective mechanisms are fixedly connected to one side of the four sets of sliding cavities inside the frame. The sliding cavities provide installation space and precise guidance for the testing mechanism.

[0009] As a further embodiment of this utility model, the protective mechanism includes an upper telescopic cover fixedly connected to the top of the sliding cavity, a lower telescopic cover fixedly connected to the inner bottom wall of the sliding cavity, and an inspection door rotatably connected to the side of the sliding cavity away from the inside of the frame. By setting up the protective mechanism, the operational reliability of the testing mechanism under harsh working conditions is improved.

[0010] As a further embodiment of this utility model, the inner wall of the sliding cavity is symmetrically provided with sliding grooves, and guide blocks are fixedly connected to both sides of the slider. The guide blocks are slidably connected to the inside of the sliding grooves. A rotating rod is fixedly connected to the surface of the gear, and the rotating rod is rotatably connected to the inner wall of the sliding cavity. The sliding grooves serve as guides and limiters.

[0011] As a further embodiment of this utility model, the upper telescopic cover is fixedly connected to the top of the slider, and the lower telescopic cover is fixedly connected to the bottom of the slider. The upper and lower telescopic covers provide a closed protective cavity for the movement range of the slider.

[0012] As a further embodiment of this utility model, the two sets of positive thread seats are respectively threaded to the surfaces of the two sets of sliders on the same side, and the two sets of negative thread seats are respectively threaded to the surfaces of the two sets of sliders on the other side. The arrangement of sliders, positive thread seats and negative thread seats ensures that the position detection mechanisms of the two rollers can operate in strict synchronization.

[0013] As a further embodiment of this utility model, one end of the connector is rotatably connected to a bracket, and the other end of the connector is rotatably connected to a hydraulic rod. The bracket is fixedly connected to the inner bottom wall of the frame, and the hydraulic rod is rotatably connected to the inner bottom wall of the frame. The hydraulic rod provides a stable and reliable power source for the lifting and lowering movement of the side roller.

[0014] (III) Beneficial Effects

[0015] This utility model provides a roller position detection device for a four-roll plate bending machine, which has the following beneficial effects:

[0016] 1. The roller position detection device of this four-roll plate rolling machine, through the setting of hydraulic rod, detection mechanism and synchronization mechanism, when the hydraulic rod drives the connecting part to swing to adjust the position of the side roller, the connecting part drives the connecting rods at both ends to move, converting the displacement of the side roller into the linear motion of two sets of sliders. The rack on the slider drives the gear to rotate, and the coaxial encoder converts the rotation angle into an electrical signal, which is transmitted to the external control box to monitor the displacement of the side roller in real time. At the same time, the two sliders are connected by the same screw with positive and negative threads. If the displacement of the two ends of the side roller is synchronized, the screw remains stationary. If there is a positional deviation at both ends, the opposite threads will drive the screw to rotate. The differential transformer installed in the middle of the screw will then detect this rotation angle and convert it into a direct deviation electrical signal, which is transmitted to the external control box. Thus, the absolute position of the side roller and the synchronization of the two ends are accurately monitored in real time. This plays an important role in ensuring the forming accuracy of the plate and the parallelism of the roller, and effectively avoids plate quality and equipment problems caused by roller skew.

[0017] 2. The roller position detection device of this four-roll plate bending machine, through the setting of the sliding cavity and protective mechanism, when the slider reciprocates in the sliding cavity, the telescopic cover fixed to its upper and lower end faces expands and deforms synchronously, always tightly covering the opening of the sliding cavity, forming a dynamic sealing barrier. The protective cover completely shields the slider, guide block and other transmission components, effectively isolating external dust and impurities. At the same time, the maintenance door set on one side of the sliding cavity provides convenience for daily maintenance, thus playing a dustproof and sealing role, effectively avoiding problems such as mechanism jamming, abnormal wear and encoder failure caused by impurities, ensuring the long-term stable operation and detection accuracy of the position detection device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the testing mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the synchronization mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the protective mechanism structure of this utility model.

[0022] In the diagram: 1. Frame; 2. Side roller; 3. Connecting component; 4. Detection mechanism; 401. Connecting rod; 402. Slider; 403. Rack; 404. Gear; 405. Encoder; 5. Screw; 6. Synchronization mechanism; 601. Differential transformer; 602. Forward thread; 603. Forward thread seat; 604. Reverse thread; 605. Reverse thread seat; 7. Sliding cavity; 8. Protective mechanism; 801. Upper telescopic cover; 802. Lower telescopic cover; 803. Inspection door; 9. Guide block; 10. Rotating rod; 11. Support; 12. Hydraulic rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Example 1

[0025] Please see Figures 1 to 4 This utility model provides a technical solution: a roller position detection device for a four-roll plate bending machine, including a frame 1 and side rollers 2. Connectors 3 are installed at both ends of the two sets of side rollers 2. Detection mechanisms 4 are rotatably connected to the surfaces of the four sets of connectors 3. Screws 5 are provided below the two sets of side rollers 2. A synchronization mechanism 6 is installed in the middle of the surface of the screws 5. The detection mechanism 4 includes a connecting rod 401 rotatably connected to the surface of the connectors 3. A slider 402 is rotatably connected to one end of the connecting rod 401. A rack 403 is fixedly connected to the front of the screw 5. A gear 404 is meshed with one side of the rack 403. An encoder 405 is fixedly connected to the center of the left side of the gear 404. The synchronization mechanism 6 includes a differential transformer 601 installed in the middle of the surface of the screw 5. A positive thread 602 is provided on the left side of the screw 5. A positive thread seat 603 is meshed with the surface of the positive thread 602. A negative thread 604 is provided on the right side of the screw 5. A negative thread seat 605 is meshed with the surface of the negative thread 604.

[0026] Furthermore, four sets of sliding cavities 7 are symmetrically opened on the inner side wall of the frame 1. The frame 1 is provided with scale lines on one side of the sliding cavity 7. The four sets of sliding cavities 7 are all fixedly connected to the protective mechanism 8 on one side inside the frame 1. The setting of the sliding cavity 7 plays the role of providing installation space and precise guidance for the detection mechanism 4.

[0027] Furthermore, the protective mechanism 8 includes an upper telescopic cover 801 fixedly connected to the top of the sliding cavity 7, a lower telescopic cover 802 fixedly connected to the bottom wall of the sliding cavity 7, and an inspection door 803 rotatably connected to the side of the sliding cavity 7 away from the inside of the frame 1. The protective mechanism 8 improves the operational reliability of the detection mechanism 4 under harsh working conditions.

[0028] Furthermore, the inner wall of the sliding cavity 7 is symmetrically provided with grooves, and guide blocks 9 are fixedly connected to both sides of the slider 402. The guide blocks 9 are slidably connected to the inside of the grooves. The surface of the gear 404 is fixedly connected with a rotating rod 10, which is rotatably connected to the inner wall of the sliding cavity 7. The grooves serve as guides and limiters.

[0029] Furthermore, the upper telescopic cover 801 is fixedly connected to the top of the slider 402, and the lower telescopic cover 802 is fixedly connected to the bottom of the slider 402. The upper telescopic cover 801 and the lower telescopic cover 802 provide a closed protective cavity for the movement range of the slider 402.

[0030] Furthermore, two sets of positive thread seats 603 are respectively threaded to the surfaces of two sets of sliders 402 on the same side, and two sets of negative thread seats 605 are respectively threaded to the surfaces of two sets of sliders 402 on the other side. Through the arrangement of sliders 402, positive thread seats 603 and negative thread seats 605, the position detection mechanism 4 of the two rollers 2 can be strictly synchronized.

[0031] Furthermore, one end of the connector 3 is rotatably connected to the bracket 11, and the other end of the connector 3 is rotatably connected to the hydraulic rod 12. The bracket 11 is fixedly connected to the inner bottom wall of the frame 1, and the hydraulic rod 12 is rotatably connected to the inner bottom wall of the frame 1. Through the setting of the hydraulic rod 12, a stable and reliable power source is provided for the lifting and lowering movement of the side roller 2.

[0032] The encoder 405 is model number E6C2-AG5C; the differential transformer 601 is model number RVDT. The above parameters and models can be selected according to the actual situation.

[0033] In this invention, the working steps of the device are as follows:

[0034] First step: When the hydraulic rod 12 drives the connecting piece 3 to swing to adjust the position of the side roller 2, the connecting piece 3 drives the connecting rods 401 at both ends to move, converting the displacement of the side roller 2 into the linear motion of the two sets of sliders 402. The rack 403 on the slider 402 drives the gear 404 to rotate. The coaxial encoder 405 converts the rotation angle into an electrical signal and transmits it to the external control box to monitor the displacement of the side roller 2 in real time. At the same time, the two sliders 402 are connected by the same screw 5 with a positive thread 602 and a negative thread 604. If the displacement of the two ends of the side roller 2 is synchronized, the screw 5 remains stationary. If there is a positional deviation at both ends, the opposite thread will drive the screw 5 to rotate. The differential transformer 601 installed in the middle of the screw 5 will then detect this rotation angle and convert it into a direct deviation electrical signal and transmit it to the external control box.

[0035] The second step: When the slider 402 reciprocates within the sliding cavity 7, the telescopic cover fixed to its upper and lower end faces expands and contracts synchronously, always tightly covering the opening of the sliding cavity 7, forming a dynamic sealing barrier. The protective cover completely shields the slider 402, guide block 9, and other transmission components, effectively isolating external dust and impurities. Simultaneously, the inspection door 803 located on one side of the sliding cavity 7 provides convenience for daily maintenance. It should be noted that the equipment structure and accompanying drawings of this utility model mainly describe the principle of this utility model. The technical details of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art, understanding the principle of the above utility model, can clearly understand the specifics of its power mechanism, power supply system, and control system. The control method in the application document is automatic control via a controller, and the controller's control circuit can be implemented through simple programming by those skilled in the art.

[0036] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0037] 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A roller position detection device for a four-roll plate bending machine, comprising a frame (1) and side rollers (2), characterized in that: Both ends of the two sets of side rollers (2) are equipped with connectors (3), and the surfaces of the four sets of connectors (3) are rotatably connected with detection mechanisms (4). Screws (5) are provided below the two sets of side rollers (2), and a synchronization mechanism (6) is installed in the middle of the surface of the screws (5). The detection mechanism (4) includes a connecting rod (401) rotatably connected to the surface of the connector (3). One end of the connecting rod (401) is rotatably connected to a slider (402). A rack (403) is fixedly connected to the front of the slider (402). A gear (404) is meshed with one side of the rack (403). An encoder (405) is fixedly connected to the center of the left side of the gear (404). The synchronization mechanism (6) includes a differential transformer (601) installed in the middle of the surface of the screw (5). A positive thread (602) is provided on the left side of the screw (5), and a positive thread seat (603) is engaged with the surface of the positive thread (602). A negative thread (604) is provided on the right side of the screw (5), and a negative thread seat (605) is engaged with the surface of the negative thread (604).

2. The roller position detection device for a four-roll plate bending machine according to claim 1, characterized in that: The inner wall of the frame (1) is symmetrically provided with four sets of sliding cavities (7). The frame (1) is provided with scale lines on one side of the sliding cavity (7). The four sets of sliding cavities (7) are all fixedly connected to a protective mechanism (8) on one side inside the frame (1).

3. The roller position detection device for a four-roll plate bending machine according to claim 2, characterized in that: The protective mechanism (8) includes an upper telescopic cover (801) fixedly connected to the top of the sliding cavity (7), a lower telescopic cover (802) fixedly connected to the bottom wall of the sliding cavity (7), and an inspection door (803) rotatably connected to the side of the sliding cavity (7) away from the inside of the frame (1).

4. The roller position detection device for a four-roll plate bending machine according to claim 2, characterized in that: The inner wall of the sliding cavity (7) is symmetrically provided with sliding grooves. The two sides of the slider (402) are fixedly connected with guide blocks (9). The guide blocks (9) are slidably connected to the inside of the sliding grooves. The surface of the gear (404) is fixedly connected with a rotating rod (10). The rotating rod (10) is rotatably connected to the inner wall of the sliding cavity (7).

5. The roller position detection device for a four-roll plate bending machine according to claim 3, characterized in that: The upper telescopic cover (801) is fixedly connected to the top of the slider (402), and the lower telescopic cover (802) is fixedly connected to the bottom of the slider (402).

6. The roller position detection device for a four-roll plate bending machine according to claim 1, characterized in that: The two sets of positive thread seats (603) are respectively threaded to the surfaces of the two sets of sliders (402) on the same side, and the two sets of negative thread seats (605) are respectively threaded to the surfaces of the two sets of sliders (402) on the other side.

7. The roller position detection device for a four-roll plate bending machine according to claim 1, characterized in that: One end of the connector (3) is rotatably connected to a bracket (11), and the other end of the connector (3) is rotatably connected to a hydraulic rod (12). The bracket (11) is fixedly connected to the inner bottom wall of the frame (1), and the hydraulic rod (12) is rotatably connected to the inner bottom wall of the frame (1).

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