Intelligent linkage lifting guard device for straightening machine bed

Abstract

The utility model discloses a kind of intelligent linkage lifting protective devices for straightening machine bed, it is related to metal processing safety protection technical field.The device includes fixed plate, fixed strip, servo motor, movable frame and protective net, movable frame is driven along vertical direction lifting by gear and rack transmission drive servo motor, and protective net is fixed to the inboard of movable frame.Servo motor control loop and straightening machine bed start button are electrically connected in series, form safety interlock mechanism, realize the automatic synchronous control of "machine start net rises, machine stops net falls".Device is equipped with photoelectric switch detection upper and lower limit, ensure accurate stroke;Against the type safety grating monitoring lifting path obstacle.The utility model is driven by servo and electrical interlock, replace traditional manual operation, response is fast, reliable operation, effectively avoid the loss of protection due to human carelessness, greatly improve the safety and production efficiency of straightening operation, applicable to the automatic protection needs under high-strength working condition.

Description

Technical Field

[0001] This utility model relates to the technical field of safety protection in metal processing, specifically to an intelligent linkage lifting and protection device for straightening machine tools. Background Technology

[0002] During the straightening process of metal components such as rails and profiles, straightening machine tools need to apply tens to hundreds of tons of compressive force to correct the bending deformation of the material. Under this high-pressure operating condition, if the rail body has internal defects (such as cracks or inclusions) or key components such as the top bending block fail due to fatigue, it is very easy for sudden fracture to occur, generating high-speed flying metal fragments or shock waves, which can cause serious injury to operators or even lead to major safety accidents.

[0003] Currently, the commonly used manual safety nets or fixed safety covers in the industry struggle to balance safety and ease of operation. While fixed safety covers provide continuous protection, they severely hinder material loading and unloading and equipment maintenance; while manually operated lifting safety nets have the following significant drawbacks: 1. Reliance on manual operation: Operators need to manually raise or lower the protective net every time the machine tool is started or stopped. The process is cumbersome and it is easy to forget, neglect or try to save time by not turning on the protection, resulting in the safety hazard of "having a device but no protection". 2. Delayed response: Manual operation cannot be synchronized with the machine tool's operating status in real time, resulting in a dangerous window period where "the machine tool has started but the protection is not in place" or "the machine tool has stopped but the protection has not been lowered"; 3. Lack of interlocking mechanism: Most existing devices do not form a safety interlock with the machine tool's electrical system, making it impossible to achieve the inherent safety control that "the machine tool cannot start if the protection is not closed"; 4. Lack of position detection and abnormal alarm functions: It lacks real-time monitoring of the lifting and lowering status of the protective net, and cannot determine whether it is in place or blocked, which poses a risk of malfunction.

[0004] With the deepening of the concepts of intelligent manufacturing and inherent safety, traditional passive protection modes can no longer meet the demands of modern high-efficiency and high-safety production. Therefore, there is an urgent need to develop a linkage protection system with automatic control, status feedback, safety interlocking, and intelligent sensing capabilities to achieve seamless coordination between protective actions and machine tool operation, fundamentally eliminate safety blind spots caused by human factors, and improve the inherent safety level and operational continuity of the metal processing process. Utility Model Content

[0005] The purpose of this invention is to overcome the problems of slow response, reliance on manual operation, and lack of interlocking in existing manual protective devices, and to provide a compact, fast-responding, safe, reliable, and intelligently linked lifting protective device for straightening machine tools, which realizes fully automatic safety protection of "net raised when machine starts and net lowered when machine stops", ensuring the personal safety of operators and improving the automation level and production efficiency of equipment.

[0006] An intelligent linkage lifting and protective device for a straightening machine tool includes a fixed plate, fixed bars, a servo motor, a movable frame, and a protective net. The fixed plate is horizontally arranged, and a pair of fixed bars are vertically and symmetrically fixed at both ends of the fixed plate. A pair of servo motors are respectively mounted on the two fixed bars via fixed bases, and gears are keyed to their output shafts. A pair of limiting plates are coaxially connected to the two end faces of the gears. The movable frame is vertically arranged between the two fixed bars, and a protective net is welded to its inner side. Racks are symmetrically arranged on the left and right sides of the movable frame. Each rack slides vertically between a pair of limiting plates on the same side and meshes with the gear on the same side. The control circuit of the servo motor is electrically connected in series with the start button of the straightening machine tool to form a safety interlocking mechanism.

[0007] Preferably, the fixing plate is installed on the ground by expansion screws or anchor bolts.

[0008] Preferably, a through-beam safety light curtain is vertically installed between the upper parts of the two fixing strips.

[0009] Preferably, photoelectric switch one and photoelectric switch two are respectively provided above and below the gear. Photoelectric switch one is mounted on the fixing strip through sensor bracket one, and photoelectric switch two is mounted on the fixing strip through sensor bracket two.

[0010] Preferably, a pair of support frames are symmetrically arranged below the movable frame, and the support frames are horizontally suspended and connected to the fixing strip.

[0011] Preferably, the cantilever end of the fixing strip is fitted with a rubber sleeve.

[0012] Compared with the prior art, the present invention has the following advantages: 1. Achieve intelligent interlocking between protection and equipment start / stop: By electrically connecting the control circuit of the servo motor with the start button of the straightening machine tool, a safety interlocking mechanism is formed to ensure that the machine tool can only be started when the protective device is fully closed and personnel are away from the danger zone, fundamentally preventing safety accidents caused by misoperation and improving the level of inherent safety.

[0013] 2. Stable and reliable lifting operation: The double-sided gear and rack synchronous transmission structure, combined with the guiding and limiting effect of the limit plate on the rack, effectively prevents the movable frame from swaying, jamming or tooth dislodging during the lifting process, ensuring that the protective net can be lifted and lowered smoothly, with high operating accuracy and long service life.

[0014] 3. Multiple safety protection functions: The integrated through-beam safety light curtain monitors obstacles in the lifting path in real time, and works with upper and lower limit photoelectric switches to achieve precise stroke control, avoiding the risk of overtravel or squeezing, forming a three-in-one safety protection system of "mechanical protection + electrical interlocking + photoelectric detection". Attached Figure Description

[0015] Figure 1 This is a first-view structural diagram of the present invention.

[0016] Figure 2 This is a structural schematic diagram of the entire utility model from a second perspective.

[0017] Figure 3 This is a partial first-view structural schematic diagram of the present invention.

[0018] Figure 4 This is a partial second-view structural schematic diagram of the present invention.

[0019] in: 10-Fixing plate; 11-Fixing strip; 12-Fixing base; 13-Servo motor; 14-Gear; 15-Limit plate; 16-Moving frame; 17-Protective net; 18-Rack; 19-Safety light curtain; 20-Photoelectric switch one; 21-Sensor bracket one; 22-Photoelectric switch two; 23-Sensor bracket two; 24-Support frame; 25-Rubber sleeve. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 4As shown, an intelligent linkage lifting and protective device for a straightening machine tool includes a fixed plate 10, fixed bars 11, servo motors 13, a movable frame 16, and a protective net 17. The fixed plate 10 is horizontally arranged, and a pair of fixed bars 11 are vertically and symmetrically fixed at both ends of the fixed plate 10. A pair of servo motors 13 are respectively mounted on the two fixed bars 11 via fixed bases 12. Gears 14 are keyed to their output shafts. A pair of limiting plates 15 are coaxially connected to the two end faces of the gears 14, forming a limiting channel between the two limiting plates 15. The movable frame 16 is vertically arranged between the two fixed bars 11, and a protective net 17 is welded to its inner side. The protective net 17 can be used for... High-strength stainless steel wire mesh effectively blocks splashes and facilitates observation of the processing. The movable frame 16 is symmetrically equipped with racks 18 on both sides. Each rack 18 slides vertically between a pair of limit plates 15 on the same side and meshes with the gear 14 on the same side, forming a synchronous lifting gear and rack transmission mechanism. The control circuit of the servo motor 13 is electrically connected in series with the start button of the straightening machine tool to form a safety interlock mechanism. The control circuit is only activated and the machine tool can only start running when the movable frame 16 rises to the preset high position and the protective net 17 completely closes the processing area. If the protection is not in place, the machine tool cannot start, thus fundamentally eliminating unprotected operation.

[0022] In this embodiment, the fixing plate 10 is installed on the ground by expansion screws or base bolts to ensure the structural stability of the device under frequent lifting and external impacts.

[0023] In this embodiment, a through-beam safety light curtain 19 is vertically installed between the upper parts of the two fixing bars 11, with its transmitting end and receiving end respectively installed on the left and right fixing bars 11. The safety light curtain 19 is used to detect obstacles in the lifting area of ​​the movable frame 16 in real time. Once a person or object is detected entering the area, a signal is immediately sent to control the servo motor 13 to stop or reverse, preventing pinching accidents and significantly improving the safety of equipment operation.

[0024] In this embodiment, photoelectric switch 20 and photoelectric switch 22 are respectively provided above and below the gear 14. Photoelectric switch 20 is mounted on the fixing bar 11 via sensor bracket 21, and photoelectric switch 22 is mounted on the fixing bar 11 via sensor bracket 23. Photoelectric switch 20 is used to detect whether the movable frame 16 has reached its upper limit, ensuring that the protective net automatically stops after it is fully raised and in place. Photoelectric switch 22 is used to detect whether the movable frame 16 has descended to its lower limit, achieving precise positioning and stop control. The two photoelectric switches and the servo motor 13 control module form a closed-loop feedback to ensure the reliability and repeatability of the lifting action.

[0025] In this embodiment, a pair of support frames 24 are symmetrically arranged below the movable frame 16, and the support frames 24 are horizontally cantilevered and connected to the fixed strip 11. The two side support frames 24 are used to provide auxiliary support when the movable frame 16 descends to the lowest point, share the static load of the gear and rack mechanism, extend the service life of the transmission components, and enhance the overall structural rigidity.

[0026] In this embodiment, a rubber sleeve 25 is fitted onto the cantilever end of the fixing strip 11. The rubber sleeve 25 is used to prevent operators from being injured by collisions, thereby improving the human-machine safety of the device.

[0027] This device adopts a mechatronics + safety interlock design concept to achieve fully automatic and intelligent coordinated control of protective actions and machine tool operation. Its working process is as follows: 1. Start-up phase: When the operator presses the start button of the straightening machine, the system first checks the protection status because the control circuit of the servo motor 13 is electrically connected in series with the button. If the movable frame 16 is in the lowered state, the circuit is disconnected and the machine cannot start; the circuit is only connected when the movable frame 16 is in the raised position.

[0028] Subsequently, the servo motor 13 is energized, driving the gears 14 on both sides to rotate synchronously in the forward direction, causing the rack 18 and the movable frame 16 to rise vertically along the guide channel of the limiting plate 15. The lifting action of the protective net 17 is completed within 2 seconds, completely sealing off the processing area.

[0029] During the ascent, the safety light curtain 19 scans the lifting path in real time. If any obstacle intrudes, an emergency stop is immediately triggered. When the movable frame 16 approaches the upper limit, the photoelectric switch 20 detects a signal and controls the servo motor 13 to stop precisely, ensuring adequate protection.

[0030] 2. Operational Phase: Protective netting 17 remains in the raised position, effectively isolating the straightening area and preventing injury from high-speed flying debris. The machine tool operates normally without manual intervention, achieving inherent safety.

[0031] 3. Shutdown phase: After the machine tool completes its operation, the servo motor 13 receives a stop signal and reverses, driving the movable frame 16 to descend at a constant speed. During the descent, the safety light curtain 19 continues to monitor to prevent pinching injuries.

[0032] When the movable frame 16 is lowered to its lowest position, the photoelectric switch 22 triggers a stop signal, and the servo motor 13 stops rotating; at the same time, its bottom is provided with stable support by the support frame 24 to avoid structural fatigue caused by long-term suspension.

[0033] 4. Safety interlock mechanism: The entire system achieves closed-loop control of "machine starts, network rises; machine stops, network falls," and "if the protection is not closed, the machine tool cannot be started," completely eliminating the safety risks caused by human negligence.

[0034] This device integrates multiple technologies, including servo control, photoelectric detection, safety light curtains, and electrical interlocking, to achieve automation, intelligence, and high reliability in the protection process. It significantly improves the inherent safety level and operating efficiency of the straightening machine tool and is suitable for industrial scenarios with high intensity and continuous production.

[0035] Therefore, the above-disclosed embodiments are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. An intelligent linkage lifting and protection device for a straightening machine tool, characterized in that, The machine tool includes a fixed plate (10), a fixed strip (11), a servo motor (13), a movable frame (16), and a protective net (17). The fixed plate (10) is horizontally set, and a pair of fixed strips (11) are vertically and symmetrically fixed at both ends of the fixed plate (10). A pair of servo motors (13) are respectively installed on the two fixed strips (11) through fixed seats (12). A gear (14) is keyed to its output shaft. A pair of limit plates (15) are coaxially connected to the two end faces of the gear (14). The movable frame (16) is vertically set between the two fixed strips (11), and a protective net (17) is welded to its inner side. The movable frame (16) is symmetrically provided with racks (18) on the left and right sides. Each rack (18) slides vertically between a pair of limit plates (15) on the same side and meshes with the gear (14) on the same side. The control circuit of the servo motor (13) is electrically connected in series with the start button of the straightening machine tool to form a safety interlocking mechanism.

2. The intelligent linkage lifting and protection device for a straightening machine tool according to claim 1, characterized in that, The fixing plate (10) is installed on the ground by expansion screws or foot bolts.

3. The intelligent linkage lifting and protection device for a straightening machine tool according to claim 1, characterized in that, A through-beam safety light curtain (19) is vertically installed between the upper parts of the two fixing strips (11).

4. The intelligent linkage lifting and protection device for a straightening machine tool according to claim 1, characterized in that, The gear (14) is provided with photoelectric switch one (20) above and photoelectric switch two (22) below. Photoelectric switch one (20) is mounted on the fixing bar (11) through sensor bracket one (21), and photoelectric switch two (22) is mounted on the fixing bar (11) through sensor bracket two (23).

5. The intelligent linkage lifting and protection device for a straightening machine tool according to claim 1, characterized in that, A pair of support frames (24) are symmetrically arranged below the movable frame (16), and the support frames (24) are horizontally suspended and connected to the fixing strip (11).

6. The intelligent linkage lifting and protection device for a straightening machine tool according to claim 1, characterized in that, The cantilever end of the fixing strip (11) is fitted with a rubber sleeve (25).

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