阅读说明：本技术 一种板件折弯加工用保护装置 (Protection device for bending plate ) 是由 邵伯金 吉宏祥 金正元 许志坚 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种板件折弯加工用保护装置,包括下压装置和折弯装置,第一伸缩槽的内腔安装有伸缩板,顶板的内腔安装有配重装置,靠近配重装置的一侧开设有配重室,斜面板的上端放置有滚球,配重装置的内腔壁上端一侧开设有出球孔,滚球从而能够从出球孔滚出,由于顶板内腔的重力发生变化,从而使顶板能够向一侧进行旋转。本发明的配重室的内腔壁一侧安装有气压组件,配重室的内腔底面安装有上顶组件,滚球的冲击力推动一侧安装的挡板,推板向一侧移动使气压室内腔的气体快速的从第二气管充向上顶组件的内腔,气体从而能够快速的推动气密板进行上升,气密板上升后推动上端安装的倾斜板。(The invention discloses a protection device for bending plate, which comprises a pressing device and a bending device, wherein a telescopic plate is arranged in an inner cavity of a first telescopic groove, a counterweight device is arranged in an inner cavity of a top plate, a counterweight chamber is arranged at one side close to the counterweight device, a rolling ball is placed at the upper end of an inclined plate, a ball outlet is arranged at one side of the upper end of the inner cavity wall of the counterweight device, the rolling ball can roll out of the ball outlet, and the top plate can rotate towards one side due to the change of the gravity of the inner cavity of the top plate. According to the invention, the air pressure assembly is arranged on one side of the inner cavity wall of the balance weight chamber, the upward pushing assembly is arranged on the bottom surface of the inner cavity of the balance weight chamber, the baffle plate arranged on one side is pushed by the impact force of the rolling ball, the push plate moves towards one side to enable the air in the inner cavity of the air pressure chamber to be rapidly filled into the inner cavity of the upward pushing assembly from the second air pipe, so that the air can rapidly push the air sealing plate to ascend, and the inclined plate arranged at the upper end is pushed after the air sealing plate ascends.)

1. The utility model provides a protection device is used in panel bending processing, includes pushes down device (1) and bending device (2), pushes down lower extreme installation bending device (2) of device (1), its characterized in that: the pressing device (1) comprises a front plate (11), a first hydraulic device (12) and a pressing plate (13), the first hydraulic device (12) is installed at the upper end of the front plate (11), the pressing plate (13) is installed at the lower end of the first hydraulic device (12), and the bending device (2) is installed at the lower end of the front plate (11);

the bending device (2) comprises a first protection plate (21), a bending platform (22), a second hydraulic device (23), a bending plate assembly (24) and a second protection plate (25), the bending platform (22) is installed between interlayers of the first protection plate (21), a pair of second hydraulic devices (23) are installed on the bottom surface of an inner cavity of the bending platform (22), the bending plate assembly (24) is installed at the upper end of each second hydraulic device (23), and the second protection plates (25) are installed on two sides of the bending platform (22);

the bending plate assembly (24) comprises a first bottom plate (241), a first rotating sheet (242), a top plate (243), a first telescopic groove (244), a telescopic plate (245), a counterweight device (246) and a counterweight chamber (247), wherein the first rotating sheet (242) is installed at the upper end of the first bottom plate (241), the top plate (243) is installed at the upper end of the first rotating sheet (242), the first telescopic groove (244) is formed in two sides of the inner cavity of the top plate (243), the telescopic plate (245) is installed in the inner cavity of the first telescopic groove (244), the counterweight device (246) is installed in the inner cavity of the top plate (243), and the counterweight chamber (247) is formed in one side close to the counterweight device (246);

the first bottom plate (241) comprises a second telescopic groove (2411), a first telescopic rod (2412), a first spring (2413), a first balancing weight (2414), a first warping plate (2415), a third telescopic groove (2416), a push rod (2417) and a first magnetic block (2418), the second telescopic groove (2411) is formed in the inner cavity of the first bottom plate (241), the first telescopic rod (2412) is installed in the inner cavity of the second telescopic groove (2411), the first spring (2413) is installed on the outer surface of the first telescopic rod (2412), the first balancing weight (2414) is installed at the lower end of the first telescopic rod (2412), the first warping plate (2415) is installed at the lower end of the inner cavity wall of the second telescopic groove (2411), the third telescopic groove (2416) is formed in one side close to the second telescopic groove (2411), the push rod (2417) is installed in the inner cavity of the third telescopic groove (2416), and the first magnetic block (2418) is installed at the upper end of the push rod (2417);

the counterweight device (246) comprises a second magnetic block (2461), a second connecting rod (2462), an inclined plane plate (2463), a rolling ball (2464), a ball inlet hole (2465) and a ball outlet hole (2466), the second magnetic block (2461) is installed in an inner cavity of the counterweight device (246), the second connecting rod (2462) is installed at the upper end of the second magnetic block (2461), the inclined plane plate (2463) is installed at the upper end of the second connecting rod (2462), the inclined plane plate (2464) is placed at the upper end of the inclined plane plate (2463), the ball inlet hole (2465) is formed in one side of the inner cavity wall of the counterweight device (246), the ball outlet hole (2466) is formed in one side of the upper end of the inner cavity wall of the counterweight device (246), and the magnetism of the second magnetic block (2461) is the same as that of the first magnetic block (2418);

counter weight room (247) are including hang plate (2471), second telescopic link (2472), baffle (2473), atmospheric pressure subassembly (2474) and top subassembly (2475), the inner chamber pin joint of counter weight room (247) has hang plate (2471), second telescopic link (2472) are installed to the inner chamber one end of hang plate (2471), baffle (2473) are installed to the other end of second telescopic link (2472), atmospheric pressure subassembly (2474) are installed to inner chamber wall one side of counter weight room (247), top subassembly (2475) are installed to the inner chamber bottom surface of counter weight room (247).

2. A protection device for bending a plate member according to claim 1, wherein: the goal hole (2465) comprises a triangular block (24651) and a second spring (24652), the upper end of the inner cavity wall of the goal hole (2465) is provided with the triangular block (24651), and the upper end of the triangular block (24651) is provided with the second spring (24652).

3. A protection device for bending a plate member according to claim 2, wherein: the upper top assembly (2475) comprises an air-tight plate (24751) and a sliding block (24752), the air-tight plate (24751) is installed in the inner cavity of the upper top assembly (2475), the sliding block (24752) is installed at the upper end of the air-tight plate (24751), and the upper end of the sliding block (24752) is connected with one side of the lower end of the inclined plate (2471).

4. A protection device for bending a plate member according to claim 3, wherein: atmospheric pressure subassembly (2474) includes atmospheric pressure room (24741), push pedal (24742), first trachea (24743), second trachea (24744), first back air subassembly (24745) and air outlet valve subassembly (24746), push pedal (24742) are installed to the inner chamber of atmospheric pressure room (24741), first trachea (24743) and second trachea (24744) are installed to one side of atmospheric pressure room (24741), first back air subassembly (24745) are installed to the inner chamber end of first trachea (24743), air outlet valve subassembly (24746) are installed to the inner chamber end of second trachea (24744).

5. A protection device for plate bending processing according to claim 4, wherein: the pipe diameter of the first air pipe (24743) is smaller than that of the second air pipe (24744).

Technical Field

The invention relates to the technical field of metal plate processing, in particular to a protection device for bending and processing a plate.

Background

Sheet metal is a metal of common use in all kinds of production and processing, add man-hour at sheet metal, need process it through the bender, make sheet metal can satisfy different processing demands, the bender is the machine that can bend to sheet metal, its structure mainly includes the support, workstation and clamp plate, the workstation is arranged in on the support, the workstation comprises base and clamp plate, the base passes through the hinge and links to each other with the clamp plate, the base is by the seat shell, coil and apron are constituteed, the coil is arranged in the sunken of seat shell, sunken top covers there is the apron.

However, when some thicker metal plates are bent, the metal plates are easy to break in the bending process, and the bending device can move upwards at the moment of breaking, so that the position of a breaking opening is easy to scratch one side of the bending device, and some damage is caused, thereby reducing the service life of the bending device, and preventing the bending device from rotating at a certain angle at the moment of breaking the plates to avoid the breaking opening.

Aiming at the problems, the invention provides a protection device for bending plate.

Disclosure of Invention

The invention aims to provide a protection device for bending plate, because the plate blocking force at the upper end of a top plate is suddenly reduced, the bending plate assembly can be momentarily accelerated in the process of rising, the first balancing weight arranged in the inner cavity of a second telescopic groove is moved downwards by the accelerating force, the telescopic rod arranged at the upper end is driven to retract while the first balancing weight moves downwards, the first wane is pressed downwards by the first balancing weight, the ejector rod at the other end is quickly upwarped by the first wane, the ejector rod can drive a first magnetic block to move upwards, because the magnetic force of the first magnetic block is the same as that of the second magnetic block, the second magnetic block pushes the inclined plane plate arranged at the upper end through the second connecting rod, the inclined plane plate drives a rolling ball arranged at the upper end of the rolling ball, so that the rolling ball can roll out from a ball outlet hole and then roll to the upper end of the inclined plane, and because the gravity of the inner cavity of the top plate changes, thereby make the roof rotate to one side to make the roof keep away from the fracture department of panel, prevent that the roof from being damaged by the fracture department scratch of one side panel, reduce the change frequency of roof, thereby can protect the roof, thereby solved the problem among the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a protection device for bending plate workpieces comprises a pressing device and a bending device, wherein the lower end of the pressing device is provided with the bending device, the pressing device comprises a front plate, a first hydraulic device and a pressing plate, the upper end of the front plate is provided with the first hydraulic device, the lower end of the first hydraulic device is provided with a pressing plate, and the lower end of the front plate is provided with the bending device;

the bending device comprises a first protection plate, a bending table, a second hydraulic device, a bending plate assembly and a second protection plate, wherein the bending table is arranged between interlayers of the first protection plate, a pair of second hydraulic devices are arranged on the bottom surface of an inner cavity of the bending table, the bending plate assembly is arranged at the upper end of each second hydraulic device, and the second protection plates are arranged on two sides of the bending table;

the bending plate assembly comprises a first bottom plate, a first rotating piece, a top plate, a first telescopic groove, telescopic plates, a counterweight device and a counterweight chamber, the first rotating piece is installed at the upper end of the first bottom plate, the top plate is installed at the upper end of the first rotating piece, the first telescopic groove is formed in each of two sides of the inner cavity of the top plate, the telescopic plates are installed in the inner cavities of the first telescopic grooves, the counterweight device is installed in each of the inner cavities of the top plate, and the counterweight chamber is formed in one side, close to the counterweight device;

the first bottom plate comprises a second telescopic groove, a first telescopic rod, a first spring, a first balancing weight, a first wane, a third telescopic groove, a push rod and a first magnetic block, the second telescopic groove is formed in the inner cavity of the first bottom plate, the first telescopic rod is installed in the inner cavity of the second telescopic groove, the first spring is installed on the outer surface of the first telescopic rod, the first balancing weight is installed at the lower end of the first telescopic rod, the first wane is installed at the lower end of the inner cavity wall of the second telescopic groove, the third telescopic groove is formed in one side close to the second telescopic groove, the push rod is installed in the inner cavity of the third telescopic groove, and the first magnetic block is installed at the upper end of the push rod;

the counterweight device comprises a second magnetic block, a second connecting rod, an inclined plane plate, a rolling ball, a ball inlet and a ball outlet, the second magnetic block is arranged in an inner cavity of the counterweight device, the second connecting rod is arranged at the upper end of the second magnetic block, the inclined plane plate is arranged at the upper end of the second connecting rod, the rolling ball is placed at the upper end of the inclined plane plate, the ball inlet is formed in one side of the wall of the inner cavity of the counterweight device, the ball outlet is formed in one side of the upper end of the wall of the inner cavity of the counterweight device, and the magnetism of the second magnetic block is the same as that of the first magnetic block;

the counter weight chamber includes hang plate, second telescopic link, baffle, atmospheric pressure subassembly and pushes up the subassembly, and the inner chamber pin joint of counter weight chamber has the hang plate, and the second telescopic link is installed to the inner chamber one end of hang plate, and the baffle is installed to the other end of second telescopic link, and the atmospheric pressure subassembly is installed to inner chamber wall one side of counter weight chamber, and the subassembly is pushed up to the inner chamber bottom surface of counter weight chamber is installed.

Further, the goal hole includes triangle piece and second spring, and the triangle piece is installed to the inner chamber wall upper end in goal hole, and the second spring is installed to the upper end of triangle piece.

Furthermore, the upper ejection assembly comprises an airtight plate and a sliding block, the airtight plate is installed in an inner cavity of the upper ejection assembly, the sliding block is installed at the upper end of the airtight plate, and the upper end of the sliding block is connected with one side of the lower end of the inclined plate.

Further, the air pressure assembly comprises an air pressure chamber, a push plate, a first air pipe, a second air pipe, a first air return assembly and an air outlet valve assembly, the push plate is installed in an inner cavity of the air pressure chamber, the first air pipe and the second air pipe are installed on one side of the air pressure chamber, the first air return assembly is installed at the tail end of the inner cavity of the first air pipe, and the air outlet valve assembly is installed at the tail end of the inner cavity of the second air pipe.

Further, the pipe diameter of the first air pipe is smaller than that of the second air pipe.

The invention provides another technical scheme: a use method of a protection device for bending plate comprises the following steps:

s01: placing a plate at the upper end of a bending table, pressing down the upper end of the fixed plate by a lower pressing plate through a first hydraulic device, and then bending the plate bending assembly through a second hydraulic device;

s02: when the plate is broken in the bending process, after the pressure of the plate on the upper end of the top plate is instantly reduced, the bending plate assembly can instantly perform accelerated ascending motion, so that the first balancing weight in the inner cavity of the second telescopic groove moves downwards, the first balancing weight moves downwards and simultaneously drives the first telescopic rod arranged at the upper end, the first balancing weight then presses one end of the first wane, the first wane immediately jacks up the ejector rod, and the first magnetic block at the upper end of the ejector rod pushes the second magnetic block to move upwards through magnetic reverse thrust;

s03: after the second magnetic block moves upwards, the inclined plane plate rises to one side of the ball outlet hole, then the rolling ball rolls out of the ball outlet hole and rolls to the lowest end of the inclined plate, and meanwhile, the top plate rotates at a certain angle;

s04: when rolling along the hang plate, accelerated motion is made to the spin, through baffle striking push pedal, the push pedal makes the gas compression of atmospheric pressure indoor chamber, gets into the inner chamber of top subassembly through the second trachea afterwards, and the airtight board rebound of top subassembly inner chamber makes the hang plate least significant end start rebound simultaneously, makes the hang plate can reverse perk, and the spin can roll into counter weight device inner chamber along the hang plate once more.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention provides a protection device for bending a plate, when a thicker plate needs to be bent, the plate is placed at the upper end of a bending table, a lower pressing plate presses and fixes the plate, then a second hydraulic device operates to drive a bending plate assembly arranged at the upper end to push up to bend the plate, a top plate pushes the plate upwards with a certain thrust, when the plate is broken in the bending process, because the blocking force of the plate at the upper end of the top plate is suddenly reduced, the bending plate assembly can be momentarily accelerated in the rising process, the first balancing weight arranged in an inner cavity of a second telescopic groove is driven to move downwards by the acceleration force, the telescopic rod arranged at the upper end is driven to retract while the first balancing weight moves downwards, the first waning plate is pressed downwards by the first balancing weight, the ejector rod at the other end is quickly upwarped by the first waning plate, so that the ejector rod can drive a first magnetic block to move upwards, because first magnetic path is the same with second magnetic path magnetic force, thereby make the second magnetic path promote the inclined plane board of upper end installation through the second connecting rod, the inclined plane board drives the spin that the upper end was placed, thereby the spin can be followed out the ball hole and rolled out, the spin rolls to the upper end of hang plate afterwards, because the gravity of roof inner chamber changes, thereby make the roof rotate to one side, thereby make the fracture department of panel be kept away from to the roof, prevent that the roof from appearing damaging by one side panel fracture department scratch, reduce the change frequency of roof, thereby can protect the roof.

2. According to the protection device for bending the plate, after the rolling ball rolls along the inclined plate in an accelerated manner, the rolling ball rolls to the lowest point of the inclined plate, the baffle plate arranged on one side is pushed along with the impact force of the rolling ball, the baffle plate quickly impacts the push plate on one side, the push plate moves towards one side, so that air in the cavity of the air pressure chamber is quickly filled into the inner cavity of the upward jacking assembly from the second air pipe, the air can quickly push the air tight plate to ascend, the inclined plate arranged on the upper end is pushed after the air tight plate ascends, the lowest point on one side of the inclined plate starts to ascend, the rolling ball can reversely fall and roll, the rolling ball can conveniently enter the upper end of the inclined plate from the ball inlet hole again, and the angular rotation of the top plate is conveniently carried out again next time.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a bending apparatus according to the present invention;

FIG. 3 is a schematic view of a bending plate assembly of the present invention;

FIG. 4 is a schematic view of a first base plate structure according to the present invention;

FIG. 5 is a side view of the first base plate according to the present invention;

FIG. 6 is a side view of the top plate of the present invention;

fig. 7 is an enlarged schematic view of the structure at a in fig. 6 according to the present invention.

In the figure: 1. a pressing device; 11. a front plate; 12. a first hydraulic device; 13. a lower pressing plate; 2. a bending device; 21. a first guard plate; 22. a bending table; 23. a second hydraulic device; 24. bending the plate assembly; 241. a first base plate; 2411. a second telescopic slot; 2412. a first telescopic rod; 2413. a first spring; 2414. a first weight block; 2415. a first rocker; 2416. a third telescopic slot; 2417. a top rod; 2418. a first magnetic block; 242. a first rotating plate; 243. a top plate; 244. a first telescopic slot; 245. a retractable plate; 246. a counterweight device; 2461. a second magnetic block; 2462. a second connecting rod; 2463. an inclined plane plate; 2464. rolling a ball; 2465. a ball inlet hole; 24651. a triangular block; 24652. a second spring; 2466. a ball outlet hole; 247. a counterweight chamber; 2471. an inclined plate; 2472. a second telescopic rod; 2473. a baffle plate; 2474. an air pressure assembly; 24741. an air pressure chamber; 24742. pushing the plate; 24743. a first air pipe; 24744. a second air pipe; 24745. a first air return assembly; 24746. an air outlet valve assembly; 2475. a topping assembly; 24751. an airtight plate; 24752. a slider; 25. a second shield.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, a protection device for bending plate members includes a pressing device 1 and a bending device 2, the bending device 2 is installed at the lower end of the pressing device 1, the pressing device 1 includes a front plate 11, a first hydraulic device 12 and a lower pressing plate 13, the first hydraulic device 12 is installed at the upper end of the front plate 11, the lower pressing plate 13 is installed at the lower end of the first hydraulic device 12, the bending device 2 is installed at the lower end of the front plate 11, the bending device 2 includes a first protection plate 21, a bending table 22, a second hydraulic device 23, a bending plate assembly 24 and a second protection plate 25, the bending table 22 is installed between interlayers of the first protection plate 21, a pair of the second hydraulic devices 23 is installed at the bottom surface of an inner cavity of the bending table 22, the bending plate assembly 24 is installed at the upper end of the second hydraulic device 23, and the second protection plates 25 are installed at two sides of the bending table 22.

Referring to fig. 3 and 6, the bending plate assembly 24 includes a first bottom plate 241, a first rotating plate 242, a top plate 243, a first telescopic slot 244, a telescopic plate 245, a counterweight device 246 and a counterweight chamber 247, the first rotating plate 242 is installed at the upper end of the first bottom plate 241, the top plate 243 is installed at the upper end of the first rotating plate 242, the first telescopic slot 244 is opened at two sides of an inner cavity of the top plate 243, the telescopic plate 245 is installed in the inner cavity of the first telescopic slot 244, the counterweight device 246 is installed in the inner cavity of the top plate 243, and the counterweight chamber 247 is opened at a side close to the counterweight device 246.

Referring to fig. 4-6, the first bottom plate 241 includes a second telescopic slot 2411, a first telescopic rod 2412, a first spring 2413, a first weight 2414, a first seesaw 2415, a third telescopic slot 2416, a top rod 2417 and a first magnetic block 2418, the inner cavity of the first bottom plate 241 is opened with the second telescopic slot 2411, the inner cavity of the second telescopic slot 2411 is installed with the first telescopic rod 2412, the outer surface of the first telescopic rod 2412 is installed with the first spring 2413, the lower end of the first telescopic rod 2412 is installed with the first weight 2414, the lower end of the inner cavity wall of the second telescopic slot 2411 is installed with the first seesaw 2415, one side close to the second telescopic slot 2411 is opened with the third telescopic slot 2416, the inner cavity of the third telescopic slot 2416 is installed with the top rod 2417, the upper end of the top rod 2417 is installed with the first magnetic block 2418, the weight device 246 includes a second magnetic block 2461, a second connecting rod 2462, a 2463, a rolling ball 2463, a ball inlet 2465 and a ball outlet 2466, and a weight device with an inner cavity of a second magnetic block 246, a second connecting rod 2462 is mounted at the upper end of a second magnetic block 2461, a bevel plate 2463 is mounted at the upper end of the second connecting rod 2462, a rolling ball 2464 is placed at the upper end of the bevel plate 2463, a ball inlet 2465 is formed in one side of the inner cavity wall of the counterweight device 246, a ball outlet 2466 is formed in one side of the upper end of the inner cavity wall of the counterweight device 246, the magnetism of the second magnetic block 2461 is the same as that of the first magnetic block 2418, when a thick plate needs to be bent, the plate is placed at the upper end of the bending table 22, the plate is pressed and fixed by the lower pressing plate 13, then the second hydraulic device 23 operates to drive the bending plate assembly 24 mounted at the upper end to be pushed upwards to bend the plate, the top plate 243 pushes the plate upwards with a certain thrust, when the plate is broken in the bending process, because the blocking force of the plate at the upper end of the top plate 243 is suddenly reduced, the bending plate assembly 24 can be momentarily accelerated in the rising process, the accelerating force makes the first balancing weight 2414 installed in the inner cavity of the second telescopic groove 2411 move downwards, the first balancing weight 2414 moves downwards and simultaneously drives the first telescopic rod 2412 installed at the upper end to retract, meanwhile, the first balancing weight 2414 presses the first warped plate 2415 downwards, the first warped plate 2415 makes the ejector rod 2417 at the other end quickly tilt upwards, so that the ejector rod 2417 can drive the first magnetic block 2418 to move upwards, because the magnetic force of the first magnetic block 2418 is the same as that of the second magnetic block 2461, the second magnetic block 2461 pushes the inclined plane 2463 installed at the upper end through the second connecting rod 2462, the inclined plane 2463 drives the rolling ball 2464 placed at the upper end, the rolling ball 2464 can roll out from the ball outlet hole 2466, the rolling ball 2464 then rolls to the upper end of the inclined plane 2471, because the gravity of the inner cavity of the top plate 243 changes 243, the top plate 243 can rotate towards one side, thereby making the top plate far away from the fracture of the plate, and preventing the top plate from being damaged by the fracture of the fracture part of one side, the frequency of replacing the top plate 243 is reduced, so that the top plate 243 can be protected, the goal 2465 comprises a triangular block 24651 and a second spring 24652, the upper end of the inner cavity wall of the goal 2465 is provided with the triangular block 24651, and the upper end of the triangular block 24651 is provided with the second spring 24652.

Referring to fig. 7, the counterweight chamber 247 includes an inclined plate 2471, a second telescopic bar 2472, a baffle 2473, and an air pressure assembly 2474, the air pressure assembly 2474 includes an air pressure chamber 24741, a push plate 24742, a first air pipe 24743, a second air pipe 24744, a first air return assembly 24745, and an air outlet valve assembly 24746, the push plate 24742 is installed in an inner cavity of the air pressure chamber 24741, the first air pipe 24743 and the second air pipe 24744 are installed at one side of the air pressure chamber 24741, the first air return assembly 24745 is installed at an end of the inner cavity of the first air pipe 24743, the air outlet valve assembly 24746 is installed at an end of the inner cavity of the second air pipe 24744, the pipe diameter of the first air pipe 24743 is smaller than that of the second air pipe 24744, the upper jacking assembly 2475 includes an air sealing plate 2475 and a sliding block 24752, the air sealing plate 24751 is installed in the inner cavity of the upper jacking assembly 2475, the sliding block 24752 is installed at an upper end of the air sealing plate 24751, the upper end of the sliding block 24752 is connected to one side of the lower end of the inclined plate 2471, the inner cavity of the counterweight chamber 24247 has an inclined plate 2471, a second telescopic bar 2472 is installed at one end of the inner cavity of the inclined plate 2471, a baffle 2473 is installed at the other end of the second telescopic bar 2472, an air pressure assembly 2474 is installed at one side of the inner cavity wall of the counterweight chamber 247, an upper top assembly 2475 is installed at the bottom surface of the inner cavity of the counterweight chamber 247, when the rolling ball 2464 rolls along the inclined plate 2471 in an accelerated manner, the rolling ball 2464 rolls to the lowest point of the inclined plate 2471, the baffle 2473 installed at one side pushes the baffle 2473 installed at one side rapidly, the baffle 2473 hits the push plate 24742 at one side rapidly, the push plate 24742 moves to one side, air in the inner cavity of the air pressure chamber 24741 is rapidly filled into the inner cavity of the upper top assembly 2475 from the second air pipe 24744, the air can rapidly push the air sealing plate 24751 to ascend, the inclined plate 2471 installed at the upper end after the air sealing plate 24751 ascends, the lowest point at one side of the inclined plate 2471 starts to ascend, the inclined plate 2464 can reversely descend, and the rolling ball 2464 can enter the upper end of the inclined plate 2463 again from the ball inlet 2465 conveniently, the angular rotation of the top plate 243 is facilitated to be performed again next time.

The invention provides another technical scheme: a use method of a protection device for bending plate comprises the following steps:

s01: placing the plate at the upper end of a bending table 22, pressing down the upper end of the fixed plate by a lower pressing plate 13 through a first hydraulic device 12, and then bending the bending plate assembly 24 through a second hydraulic device 23;

s02: when the plate is broken in the bending process, after the pressure of the plate on the upper end of the top plate 243 is instantaneously reduced, the bending plate assembly 24 instantaneously performs accelerated ascending motion, so that the first balancing weight 2414 in the inner cavity of the second telescopic groove 2411 moves downwards, the first balancing weight 2414 moves downwards and simultaneously drives the first telescopic rod 2412 installed at the upper end, the first balancing weight 2414 then presses one end of the first wane 2415, the first wane 2415 immediately jacks the ejector rod 2417 upwards, and the first magnetic block 2418 at the upper end of the ejector rod 2417 pushes the second magnetic block 2461 to move upwards through magnetic reverse thrust;

s03: after the second magnetic block 2461 moves upwards, the inclined plane 2463 rises to one side of the ball outlet 2466, and then the rolling ball 2464 rolls out of the ball outlet 2466 to the lowest end of the inclined plane 2471, and the top plate 243 rotates at a certain angle;

s04: as the ball 2464 rolls along the inclined plate 2471, the ball 2464 accelerates, and the baffle 2473 impacts the push plate 24742, the push plate 24742 compresses the gas in the chamber of the gas pressure chamber 24741, and then enters the chamber of the upper top assembly 2475 through the second gas tube 24744, the gas seal 24751 in the chamber of the upper top assembly 2475 moves upward, and the lowest end of the inclined plate 2471 starts to move upward, so that the inclined plate 2471 can tilt back up, and the ball 2464 can roll into the chamber of the counterweight device 246 along the inclined plate 2471 again.

In summary, the following steps: the invention provides a protection device for bending a plate, when a thicker plate needs to be bent, the plate is placed at the upper end of a bending table 22, a lower pressing plate 13 presses down and fixes the plate, then a second hydraulic device 23 operates to drive a bending plate assembly 24 arranged at the upper end to push up and bend the plate, a top plate 243 pushes the plate upwards with certain thrust, when the plate is broken in the bending process, the plate blocking force at the upper end of the top plate 243 is suddenly reduced, the bending plate assembly 24 can be momentarily accelerated in the rising process, the first balancing weight 2414 arranged in an inner cavity of a second telescopic groove 2411 is moved downwards by the acceleration force, the first telescopic rod 2412 arranged at the upper end is driven to retract while the first balancing weight 2414 moves downwards, meanwhile, the first balancing weight 2414 presses the first wane 2415 downwards, the top rod 2417 at the other end is quickly tilted upwards by the first wane 2415, the top rod 2417 can drive the first magnetic block 2418 to move upwards, the first magnetic block 2418 and the second magnetic block 2461 have the same magnetic force, so that the second magnetic block 2461 pushes the inclined plane plate 2463 installed at the upper end through the second connecting rod 2462, the inclined plane plate 2463 drives the rolling ball 2464 placed at the upper end, the rolling ball 2464 can roll out from the ball outlet hole 2466, the rolling ball 2464 then rolls to the upper end of the inclined plate 2471, the top plate 243 can rotate towards one side due to the change of the gravity of the inner cavity of the top plate 243, so that the top plate 243 is far away from the fracture of the plate, the top plate 243 is prevented from being scratched and damaged by the fracture of the plate at one side, the replacement frequency of the rolling ball 243 is reduced, the top plate 243 can be protected, after the rolling ball 2464 rolls along the inclined plate 2471, the rolling ball 2464 rolls to the lowest point of the inclined plate 2471, the baffle 2473 installed at one side is pushed by the impact force of the rolling ball 2464, the baffle 2473 quickly impacts the pushing plate 24742 at one side, the push plate 24742 moves to one side, so that air in the inner cavity of the air pressure chamber 24741 can be rapidly filled into the inner cavity of the upper ejection assembly 2475 from the second air pipe 24744, the air can rapidly push the air-tight plate 24751 to ascend, the air-tight plate 24751 ascends to push the inclined plate 2471 arranged at the upper end, the lowest point at one side of the inclined plate 2471 begins to ascend, the rolling ball 2464 can reversely fall and roll, the rolling ball 2464 can conveniently enter the upper end of the inclined plate 2463 again from the ball inlet 2465, and the angular rotation of the upper plate 243 can be conveniently carried out again next time.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.