KR101300135B1 - Detachable bending assist apparatus for bending large size metal plates - Google Patents

Abstract

PURPOSE: A detachable device for bending a large metal plate is provided for users to conveniently work by lifting the large metal plate and rotating the large metal plate instead of the users. CONSTITUTION: A detachable device for bending a large metal plate comprises a bending assist unit (10). The bending assist unit comprises a double pneumatic cylinder (22) and a bent push rod (32). A plurality of balance rods (32b) extended from a bent rod (32a) is installed at the upper part of the push rod. A roll unit (34) installed at the leading end of the balance rod comprises a buffer wheel. The double pneumatic cylinder comprises a speed control valve in order to complete the operation of a piston rod within 0.5 to 3 seconds based on the operation of a bending machine.

Description

Detachable bending aid for bending large metal plate {DETACHABLE BENDING ASSIST APPARATUS FOR BENDING LARGE SIZE METAL PLATES}

The present invention relates to a metal plate bending machine, and more particularly, to a removable bending aiding device that can reduce the fatigue of the operator put into the metal plate bending machine and help to bend the metal plate safely.

In general, the metal plate bending machine is divided into mechanical and hydraulic, and recently, the hydraulic plate bending machine which is advantageous in terms of structure and control convenience has been preferred.

When such a metal plate bending machine bends a metal plate, the metal plate cut to the specification is put into a metal plate bending machine. The operator puts the metal plate in the bending groove of the lower mold constituting the metal plate bending machine, the bending blade is provided and presses the upper mold to operate the elevating operation, and the bending is performed on the metal plate. 'Is called.

However, in order to perform the bending in the metal plate bending machine performed by the press brake molding method, the worker should manually input the metal plate to bend the metal plate bending machine and push the metal plate to bend well when bending.

Particularly, the metal plate for bending is more than 1 meter (width or length), and in the case of heavy metal plate material, the worker's fatigue is very high when bending the metal plate, and the worker is injured during moving the metal plate or part of the metal plate. Often encounters difficulties such as dents.

From the point of view of the actual work site, about 4-5 people are required to bend the metal sheet for bending to 3 to 4 meters in length using a metal sheet bending machine. In addition, when bending the metal plate in two or more directions, the metal plate has to be rotated again and again. Therefore, safety accidents are frequently caught by the operator's fingers. High-frequency noise pollution from the friction surface of the bending machine is considerable.

Therefore, in using the sheet metal bending machine, it is desirable to provide an auxiliary means that can reduce worker fatigue and minimize safety accidents.

Domestic Patent No. 10-0566783 Bending Front Auxiliary Device "

Accordingly, an object of the present invention is to provide a detachable bending assisting device which can reduce the fatigue degree of the worker put into the metal plate bending machine and help the large metal plate to be easily bent safely.

The present invention according to the above object, provided in the bending aids for assisting the metal plate bending work is installed in the metal plate bending machine, provided with a bending aid detachably mounted in front of the main body of the metal plate bending machine, the bending aid Pivoting double acting pneumatic cylinder at the bottom of the fixed guide bar for inserting the metal plate into the metal plate bending machine, and the piston rod of the pneumatic cylinder is linked to one end of the turning lever axially connected to the lever shaft fixed to the other side of the bottom of the guide bar, The other end of the lever lever pivot lever is configured to be installed bent push rod having two or more running rolls,

The pneumatic cylinder is a detachable bending aid for bending large metal plates, characterized in that the pressure reducing valve is installed so that the piston rod can be completed within 0.5 ~ 3 seconds in synchronization with the bending operation of the metal plate bending machine. to be.

In another aspect, the present invention, characterized in that the bending plate of the push rod is formed to be bent by the push rod inclined up to 55 ° to 70 ° from the horizontal surface of the guide plate on which the metal plate is mounted,

In addition, the double-acting pneumatic cylinder is characterized in that configured to operate at 5 ~ 7kg / ㎠ pneumatic.

In addition, the present invention is characterized in that the upper surface of the guide plate is provided with a plurality of ball cast for sliding free movement of the metal plate, the rotating plate is configured to be installed on the guide plate opposite to facilitate the rotation of the elongated metal plate, characterized in that the configuration do.

In addition, the present invention is characterized in that the cushioning pad is attached to the bending rod of the push rod that can hit the bottom surface of the guide line,

The upper part of the push rod is provided with a balance branch diverged from the bend and the running roll installed at the tip of the balance is characterized by consisting of a roller having a buffer wheel.

The present invention is equipped with a detachable bending aid to the metal plate bending machine when the worker needs to bend the large metal plate or heavy metal plate in place of the operation of pushing the large metal plate in place of the operator when the metal plate bending machine operation and to other parts Rotating the metal plate that needs to be bent for easy reloading also has the advantage of reducing the worker's fatigue and allowing the worker to work safely.

1 is an installation configuration of the removable bending assisting apparatus according to an embodiment of the present invention,
Figure 2 is a perspective configuration diagram of the bending aid of Figure 1,
3 is a perspective configuration diagram of a push rod separated from the bending aid of FIG. 1;
Figure 4 is an operating state of the removable bending aid according to an embodiment of the present invention,
5 is a perspective view of an operating state of the detachable bending aid of the present invention;
Figure 6 is a perspective view of the operating state of the detachable bending aid of the present invention during the front and rear end bending operation of the long metal plate.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The bending assisting apparatus according to the embodiment of the present invention is an auxiliary tool for assisting in bending work of the metal plate P, which is difficult to be handled by an operator because it is installed in front of the main body of the metal plate bending machine 2 as shown in FIG. 1.

The large metal plate (P), which is hard to be handled by the operator when working with the metal plate bending machine (2), is a metal plate having a thickness of 1 meter or more and a thickness of 1.5 mm or more. This includes long length metal plates with relatively long lengths.

A lower mold 4 having a bending groove 4a is installed in the front portion of the main body of the metal plate bending machine 2, and a large metal plate P as a molding object can be horizontally fed into the lower mold 4 side. In order to ensure that the bending aid 10 is mounted, the rod-shaped mounting rod 6, which can be mounted, is installed in the front part of the body of the metal bending machine 2.

The detachable bending aid 10 of this invention can be fitted to the mounting rod 6 provided in the front part of the main body of the metal plate bending machine 2 as needed, and if it is unnecessary, it can be removed and removed from the main body of a bending machine.

The detachable bending aid (10) of the present invention is lightweight and has a structure including a double-acting pneumatic cylinder (22) and a push rod (32) using a lever principle, which operates suddenly at a predetermined pressure or higher and the speed is not constant according to load. The push rod 32, which is lever-connected to the pneumatic cylinder 22, is adaptively adapted to the pneumatic cylinder 22 in synchronism with the press bending operation of the metal plate bending machine 2 without the operator's interference while the guide bar 12 is fixed as it is. It is implemented to prevent bending or bending due to bending scratches or inconsistent motives.

More specifically, the detachable bending aid 10 of the present invention includes a fixed guide bar 12 for feeding the metal plate P into the metal plate bending machine 2.

The fixed guide bar 12 has two insertion angle pipes 14, which can be fitted to the rectangular mounting rods 6 of the metal plate bending machine 2, at the head, and a support plate between the two rectangular supporters 15. The members 16 are welded to form a flat frame. The two insertion angle tubes 14 are installed at the bottom of the head side of the guide line 12 as shown in FIG. 2 (b) or 4. And the support plate member 16 constituting the guide line 12 may be composed of a plate or "c" type bracket, square pipes and the like.

A plurality of ball casts 18 are provided on the upper surface of the guide bar 12 for sliding free movement of the metal plate P, and a long metal plate P is used in case of a long metal plate or the like used in the metal plate P. In order to facilitate the rotation of the rotating table 20, the rotating plate 20 is axially mounted on the rear side on the guide line counter 12 to enable disassembly.

As shown in the separated perspective view of FIG. 3, the rotating plate 20 is rotatably mounted on the separate tray 21, and the separate tray 21 has two supports extending to the rear side of the guide bar 12 as necessary. 15) It is inserted into the rail unit 19 installed inside, and is fixed in position by a fixing pin or the like.

The rotating plate 20 on the detachable tray 21 rotatably mounted on the rear side of the guide bar 12 is preferably configured to be positioned slightly higher than the ball cast 18, and the push rod 32 is lever-type. As it is a structure to be removed during normal operation of lifting the ball cast 18 does not interfere with the use.

Meanwhile, one end of the double-acting pneumatic cylinder 22 is pivotally connected to the bottom rear end fixing bracket 26 of the guide line 12 according to the present invention.

The pneumatic cylinder 22 adopted in accordance with the present invention has the advantage that the high-speed drive, compact, lightweight, and simple attachment may be possible in nature, thereby enabling the bending aid 10 to be detachable. Furthermore, since the double-acting pneumatic cylinder 22 can exert an equal force over a long distance in the forward and backward movement of the piston rod 24, it is supported by the rear of the heavy metal plate P applied in the present invention, or the compressed air It is useful for lowering the metal plate P while being exhausted.

In addition, the pneumatic cylinder 22 of the present invention has a blind spot in which the speed is not constant unlike the hydraulic cylinder drive structure or the gear drive structure due to its characteristics. When the metal plate P, which is laid on the guide bar 12, is raised by using the push rod 32, the weight of the metal plate P acting on the push rod 32 due to the gravity effect is large. If the rear end of the metal plate (P) is raised to some extent while bending to the front end of the metal plate (P), the gravity effect is reduced and the weight acting on the push rod 32 is reduced, so the metal plate (P) is lifted. The lifting speed is accelerated. The operation of the variable speed of the pneumatic cylinder 22 is pushed in synchronization with the bending of the metal plate (P) performed by the metal plate bending machine (2) to achieve a successful bending product without product defects or warpage phenomenon To be able.

The pneumatic cylinder 22 pivotally connected to the bottom of the guide bar 12 allows the piston rod 24 to be linked to one end of the pivot lever 30 axially connected to the bottom leading shaft lever 28 of the guide bar 12. Configure. And the other end of the turning lever 30 is axially connected to the lever shaft 28, the bent push rod 32 having two or more running rolls 34 of the tip is assembled.

The bent push rod 32 is integrally formed with a V-shaped bending table 32a and a balance table 32b branched from the bending table 32a in the form of a branch, and at the tip of each balancing table 32b. After the rear end of the (P) is configured to be equipped with a traveling roll 34 for pushing up.

Since the V-shaped bending table 32a constituting the bent push rod 32 forms a plurality of adjusting holes, a worker pushes the turning lever 30 with the tightening bolts of the adjusting holes and the turning lever 30. The length of the rod 32 can be extended, and the two or more traveling rolls 32 provided at the tip of the balance table 32b are constituted by rollers having shock absorbing wheels, and are pushed by the bent push rod 32. The 32 strikes the impact on the metal plate P.

In addition, the present invention is configured such that the shock absorbing pad 36 is attached to the position of the V-shaped bent table 32a of the push rod 32 that can hit the bottom of the guide bar 12.

In the exemplary embodiment of the present invention, the bent push rod 32 used with the double-acting pneumatic cylinder 22 is operated by the lever principle, so that only the bent push rod 32 pushes the metal plate P while the metal plate P is easily pressed. The rear end of the device can be supported in a balanced manner and pushed up without scratching the surface of the metal product.

In detail, in the present invention, since the guide bar 12 carrying the metal plate P is fixed and immovable, the table corresponding to the guide bar 12 may be caused by surface contact between the metal plates P along the rise. There is no scratching phenomenon, only the bent push rod 32 to raise the metal plate (P) in a balanced manner, but only the line contact by the free running of the running roll 34, the frictional resistance can be minimized to scratch the product The phenomenon is not caused. In the present invention, the guide bar 12 is configured to be fixed to give the benefit that the worker standing around the guide bar 12 can work safely.

Typically, the pneumatic cylinder is too fast than the operating speed of the metal plate bending machine (2) because the piston rod will operate within 0.5 seconds if no action is taken. In other words, the pneumatic cylinder operates suddenly and quickly when the pressure exceeds a certain pressure. Accordingly, in the present invention, in configuring the double-acting pneumatic cylinder 22, the pressure control valve for reducing the pressure in the pneumatic cylinder 22 so that the piston rod 24 can be completed within 0.5 to 3 seconds, preferably 1 to 2 seconds. (Which can be called a 'speed controller'). When the thickness of the metal plate to be bent is thick, the operation completion time of the pneumatic cylinder 22 can be extended to 3 seconds.

As the inventors of the present invention confirmed through numerous experiments, the push rod 32 of the bending aid 10 pushes up the metal plate P similarly or slightly faster than the bending operation of the metal plate bending machine 2 to complete the bending product without defects. As a result, the piston rod 24 of the pneumatic cylinder 22 was completed within 0.5 to 3 seconds (preferably 1 to 2 seconds) using the pressure reducing valve for pressure reduction. There are various types of speed control valves such as pressure reducing valves, relief valves, safety valves, sequence valves, proportional pressure control valves, etc. In the present invention, the pressure reducing valve is adopted and operation completion is within 0.5 to 3 seconds (preferably 1 to 2 seconds). The valve is adjusted to make.

In addition, the double-acting pneumatic cylinder (22) adopted in the present invention is operated at 5 to 7 kg / ㎠ pneumatic pressure to be effective for bending assistance and up to 55 ° ~ 70 from the horizontal plane of the guide plate 12 on which the metal plate (P) is mounted The bending table 32a of the push rod 32 is bent so that the metal plate P can be lifted at an angle to °. This allows the bending aid 10 to be operated in synchronization with the operation of the metal plate bending machine 2, and in particular, lifts up the support of the metal plate P, while enabling the acceleration operation of the push rod 32 at the end. .

Now it will be described in more detail the operation of the removable bend assisting device according to an embodiment of the present invention as described above.

As shown in FIG. 1, the detachable bending aid 10 is installed in front of the metal plate bending machine 2 so that the guide bar 12 is fixedly supported.

Thus, when the removable bending aid (10) as in the present invention is installed, the work is possible even if only two people to reduce the input of more than five existing personnel.

In the case of the long metal plate P among heavy large metal plates, the rotary plate 20 is installed on the guide bar 12, otherwise the rotary plate 20 is removed from the guide bar 12.

The large metal plate P, which is difficult for the operator to handle, is placed on the bending aid 10 with the help of a simple hoist suspended from the ceiling, and then put into the metal plate bending machine 2 by the operator's adjustment. When the start switch is pressed, the control unit of the bending aid 10 is recognized at the same time as the control unit of the metal plate bending machine 2 and proceeds with each operation.

That is, the double acting pneumatic cylinder 22 of the bending aid 10 is extended in the process of performing the bending operation of the metal plate bending machine 2 and the bending operation of the metal plate bending machine 2. Then, the pivoting lever 30 connected to the piston rod 24 of the pneumatic cylinder 22 pivots on the lever principle, while pushing up the metal plate P with the push rod 32 as shown in FIG. 34) The bearings continue to be moved while moving the supporting position according to the inclination angle of the metal plate (P). In addition, when the bending is almost finished, the weight of the metal plate P applied to the tip of the push rod 32 is relatively lightly applied, and the rear end portion of the metal plate P is accelerated further due to the characteristics of the pneumatic cylinder 22. Push the metal plate (P) up to 55 ° ~ 70 ° from the horizontal surface of the).

The piston rod 24 of the pneumatic cylinder 22 is completed within 1 to 2 seconds by a pressure reducing pressure control valve installed in the pneumatic cylinder 22, and the push rod 32 is operated by the operation of the pneumatic cylinder 22. If too high, the shock absorbing pad 36 attached to the bend 32a of the push rod 32 strikes the bottom of the guide bar 12 to prevent further rise.

Once bending of the metal plate P is finished by the above operation, the exhaust valve side of the pneumatic cylinder 22 is controlled to be opened, and the push rod 32 is gradually lowered to the initial position by the weight of the metal plate P. The metal plate P, one end of which is bent, is laid on the guide line 12.

If bending of the other end of the metal plate (P) is also necessary, the operator can easily turn by using the sliding free movement of the multiple ball casts (18) on the guide line (12) and the other end of the metal plate (P). To be put in, repeating the above operation can be carried out bending and bending assistance.

If the metal plate P is a long object, the rotary disk 20 axially mounted on the separate tray 21 is used. As shown in FIG. 6, the metal plate P1, which is long on the guide bar 12, is easily rotated by using the rotary plate 20 positioned higher than the ball cast 18, and the one side of the metal plate P1 is bent. Prepare the other side for bending.

As described above, the bending assisting device of the present invention is simple and light in structure and easy to install and dismantle as compared to a motor type or a gear type, and is stably fixed to the front of the bending machine 2 and supports while pushing up the metal plate P. Even when supporting, the whole table is not moved but pushed up only by the push rod 32 having the balance table 32b, so that not only the safety of the worker but also the product defect of the metal plate P are improved, thus improving the convenience and productivity of the work. This is maximized.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of claims and equivalents thereof.

(2)-sheet metal bending machine (4)-lower mold
(4a)-Bending Groove (6)-Mounting Rod
(10)-Bending aids (12)-Opposing guides
(14)-Insertion angle tube (15)-Support
(16)-Base plate member (18)-Ball cast
(19)-rail
(20)-Turntable (21)-Detachable Tray
(22)-Double acting pneumatic cylinder (24)-Piston rod
(26)-Fixing bracket (28)-Lever axis
(30)-Swing lever (32)-Push rod
(32a)-Bending Table (32b)-Balance
(34)-Running roll (36)-Shock absorbing pad
(P)-metal plate

Claims (6)

In the bending aids installed in the metal sheet bending machine to assist in bending the metal plate,
A bending aid is detachably mounted in front of the body of the metal plate bending machine, and the bending aid pivotally installs a double-acting pneumatic cylinder at the bottom of the fixed guide bar for inserting the metal plate into the metal plate bending machine, and the piston rod of the pneumatic cylinder Linked to one end of the pivoting lever axially connected to the lever shaft fixed to the other side of the bottom of the guide rail, a bent push rod having two or more running rolls is assembled at the other end of the pivoting lever of the lever shaft, and the upper part of the pushrod Balanced branches diverged from the bending table are installed, and the running roll installed at the tip of the balanced table consists of rollers with cushioning wheels.
The pneumatic cylinder is a detachable bending aid for bending large metal plates, characterized in that the pressure reducing valve is installed so that the piston rod can be completed within 0.5 ~ 3 seconds in synchronization with the bending operation of the metal plate bending machine. .
The bending of the large metal plate according to claim 1, wherein the bending plate of the push rod is bent so that the metal plate can be lifted by the push rod at an angle of up to 55 ° to 70 ° from the horizontal surface of the guide plate on which the metal plate is placed. Detachable bend assist device.
According to claim 1 or claim 2, The double acting pneumatic cylinder detachable bending aid for bending a large metal plate, characterized in that configured to be operated at 5 ~ 7kg / ㎠ pneumatic.
In the bending aids installed in the metal sheet bending machine to assist in bending the metal plate,
A bending aid is detachably mounted in front of the body of the metal plate bending machine, and the bending aid pivotally installs a double-acting pneumatic cylinder at the bottom of the fixed guide bar for inserting the metal plate into the metal plate bending machine, and the piston rod of the pneumatic cylinder It is configured to be connected to one end of the turning lever axially connected to the lever shaft fixed to the other side of the bottom of the guide line, and to the other end of the turning lever of the lever shaft, a bent push rod having two or more running rolls is assembled.
A plurality of ball casts for sliding free movement of the metal plate is provided on the upper surface of the guide bar, and the turntable is configured to be disassembled and installed on the guide bar opposite to facilitate rotation of the metal plate for long objects.
The pneumatic cylinder is a detachable bending aid for bending large metal plates, characterized in that the pressure reducing valve is installed so that the piston rod can be completed within 0.5 ~ 3 seconds in synchronization with the bending operation of the metal plate bending machine. .
The detachable bending aid for bending a large metal plate according to claim 1 or 2, wherein a buffer pad is attached to a bending rod of the push rod which may hit the bottom of the guide bar.
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