JP3895861B2 - Bending method and apparatus for plate bending machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bending method and apparatus of the plate material bending machine performing bends on plate.
[0002]
[Prior art]
Conventionally, when bending a product G with an R-bend as shown in FIG. 12 with a plate bending machine, even if the presser die is adjusted to the bending length, it cannot be processed because the bending die is a single one. As shown in FIG. 13, a clearance is required at the K portion.
[0003]
[Problems to be solved by the invention]
By the way, in the above-described conventional plate bending machine, as shown in FIG. 14, when the workpiece W is pressed by the upper and lower presser molds 101 and 103 and the R portion is bent first, the bending mold 105 becomes the full length. Therefore, the side of the groove is bent. Further, as shown in FIG. 15, if the adjacent side is bent first, the adjacent side is crushed at the time of overbending because the springback of the R-bending is large.
[0004]
Further, as shown in FIG. 16, the standard bending mold interferes with the workpiece W when the dimension a is small. If the bending die 105 is made thin in order to avoid interference with the workpiece W, the bendable plate thickness can be limited, and acute angle bending is also impossible. Moreover, in order to bend the product G as shown in FIG. 17, the bending die 105 must be comb-toothed.
[0005]
An object of the present invention is to provide a bending method and apparatus for a plate bending machine that can cope with special bending without losing versatility, and a bending die used in the apparatus.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the bending method of the plate bending machine according to the present invention according to claim 1 is a pair of upper and lower auxiliary members at the nod part of the bend beam provided with a lower bending mold. When bending a workpiece by providing a die, a bending step of positioning the upper and lower auxiliary dies at a predetermined position in the left-right direction and performing partial bending at a predetermined position on the plate material by vertical movement of the bend beam; A product unloading step of unloading the processed product with the upper and lower auxiliary dies to the outside from the plate material bending machine.
[0007]
According to a second aspect of the present invention, there is provided a bending apparatus for a sheet bending machine according to the present invention, wherein the bending apparatus includes a bend beam provided with a pair of upper and lower bending molds. The position of the front and rear direction of the tip portion in the throat portion of the bend beam is in contact with the tip of the upper and lower bending mold, and the position in the front and rear direction of the tip of the upper and lower bending die is the same as the coordinate in the front and rear direction . A lower auxiliary mold is provided, and the length of the lower auxiliary mold in the left-right direction is the same as a predetermined plate portion partial bending length, and is provided so as to be freely positioned at a predetermined position. .
[0008]
Therefore, by using the bending method and apparatus of the plate bending machine according to claims 1 and 2 described above, the upper and lower auxiliary molds are in contact with the upper and lower bending molds in the bend portion of the bend beam. Provide. The upper and lower auxiliary dies can be exchanged and can be positioned at a predetermined bending position in order to be able to cope with the partial bending length of the plate material with respect to the bend beam. Further, by moving the upper and lower auxiliary molds, the processed product can be carried out from the plate bending machine.
[0009]
Thus, it is possible to handle special bending without losing versatility, and it is also possible to carry out processed products.
[0011]
According to a third aspect of the present invention, there is provided a bending apparatus for a plate bending machine according to the present invention, wherein the bending apparatus includes a bend beam provided with a pair of upper and lower bending molds. A lower auxiliary die that can be positioned by an actuator is provided in the bend beam throat portion at a machining position that contacts the tip of the lower bending die and a retracted position, and a position in the front-rear direction of the tip of the lower bending die at the machining position And the position of the front-back direction of the front-end | tip part of the said lower auxiliary metal mold | die is located in the same coordinate, It is characterized by the above-mentioned.
[0012]
A lower auxiliary die that can be positioned at a machining position and a retracted position is provided in the bending portion of the plate bending machine, that is, in the bend portion of the bend beam. For this reason, since the lower auxiliary mold is positioned at the processing position during use and is in the retracted position when not used, the lower auxiliary mold does not get in the way when the upper and lower bending molds are bent.
[0013]
According to a fourth aspect of the present invention, there is provided a bending apparatus for a plate bending machine according to the second aspect of the present invention, wherein the upper and lower auxiliary molds are movable in the left-right direction by a drive member. It is characterized by being provided in.
[0014]
Further, the bending apparatus of the plate material bending machine of the invention according to claim 5, in the bending apparatus of the plate material bending machine according to claim 4, wherein the drive member is on, which is connected to the lower auxiliary mold It is characterized by comprising a chain and a drive motor for running the chain.
[0015]
Therefore, on, positioning of the left and right direction of the lower auxiliary mold, on through the chain by the drive motor to move the lower auxiliary mold in the lateral direction, or at a predetermined position, the products of the processed It can be carried out. Therefore, it is possible to reliably position the upper auxiliary mold and carry out the product with a simple configuration.
[0020]
Thus, special bending can be handled by the auxiliary bending mold without losing versatility.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, since the board | plate bending machine and the carrying-in apparatus which carries in a board | plate material to this board | plate bending machine are already a thing of a well-known structure, detailed description is abbreviate | omitted.
[0022]
First, in order to facilitate understanding, the overall configuration of the plate material bending machine and the carry-in device will be schematically described.
[0023]
Referring to FIGS. 10 and 11, a work table 5 constituting a loading device 3 for loading a plate material is installed on the front side (left side in FIGS. 10 and 11) of the plate material bending machine 1. An unloading table 7 is provided between the work table 5 and the plate bending machine 1 to carry out processed products.
[0024]
At the upper part of the work table 5, a manipulator 15 that can be moved forward and backward includes a clamping device 9 for gripping a plate material and a rotating mechanism 13 provided with a rotating shaft 11 that rotates the clamping device 9. .
[0025]
The plate material bending machine 1 includes an elevating frame 19 that is movable upward and downward in an upward direction of the fixed frame 17. The fixed frame 17 is provided with a lower board 21 extending in the left-right direction (a direction orthogonal to the drawing in FIG. 10 and a vertical direction in FIG. 11), and the lifting frame 19 faces the lower board 21 in the left-right direction. A stretched upper board 23 is provided.
[0026]
With the above configuration, when the lifting frame 19 swings in the vertical direction, the upper plate 23 and the lower plate 21 fix the plate material under pressure and release the pressure fixed state.
[0027]
In order to bend the protruding portion of the plate material fixed by the upper plate 23 and the lower plate 21 downward or upward, a bend beam 29 having a normal bending die 25 and a reverse bending die 27 is moved upward and downward. It can be swung freely.
[0028]
With the above configuration, the bend beam 29 is appropriately operated to swing the forward bending die 25 upward, or the reverse bending die 27 swings downward to raise the protruding portion of the plate material. It can be bent in the direction or downward.
[0029]
Next, the upper auxiliary mold which is the main part of the present invention will be described in detail.
[0030]
Referring to FIGS. 1, 2, and 3, the bend beam 29 is provided with a pair of a forward bending die 25 and a reverse bending die 27. A mold 33 and a lower auxiliary mold 35 are guided by a guide member 37 and mounted so as to be movable in the left-right direction (the direction orthogonal to the drawing in FIG. 1, the left-right direction in FIGS. 2 and 3). The tip portions of the upper and lower auxiliary dies 33, 35 are provided at the processing positions in contact with the tips of the reverse bending dies 27, 25, and the upper and lower auxiliary dies 33, 35 are In order to correspond to the bending length, it can be attached to, removed from and replaced with the bend beam 29.
[0031]
The drive member 39 for moving and positioning the upper and lower auxiliary dies 33, 35 in the left-right direction is a drive motor 41 provided on one side of the bend beam 29, as shown in FIGS. A drive side sprocket 43 is provided on the output shaft. A driven sprocket 45 is provided on the other side of the bend beam 29, and a chain 47 is looped around the driving sprocket 43 and the driven sprocket 45. The auxiliary molds 33 and 35 are connected to each other. 2 and 3 show the drive member 39 of the upper auxiliary mold 33, the drive member 39 of the lower auxiliary mold 35 has the same configuration.
[0032]
With the above configuration, when the drive motor 41 is driven, the drive-side sprocket 43 rotates and the chain 47 travels, so that the upper auxiliary dies 33 and 35 move in the left-right direction along the guide member 37 to a predetermined position. Is positioned.
[0033]
With the configuration as described above, as the operation, referring to FIG. 4 (A) and FIG. 4 (B), a product G having a partially bent portion M as shown in FIG. 4 (B) is produced. As shown in FIG. 4A, the lower auxiliary die 35 is positioned at a predetermined position of the plate material W held by the upper and lower boards 21 and 23 to raise the bend beam 29. Bending by swinging in the direction. Although illustration is omitted, partial bending using the upper auxiliary mold 33 is also possible. Thus, partial bending, which was impossible in the past, can be made possible.
[0034]
5 (A) and 5 (B) show a method for carrying out the product. The final bending is a reverse bending (bottom bending) product carrying out, and the product G has the upper and lower boards 23 and 21. If the upper and lower boards 23, 21 are released, the lower auxiliary mold 35A (this mold has a side plate attached by deformation of the lower auxiliary mold 35 described above) is released. The bent product G is pushed out of the machine by the side. Although not shown, the upper bent product 33 can be used to carry out the upper bent product.
[0035]
FIGS. 6A and 6B show a case where the flange is bent short. That is, in FIG. 6A, when a short bending of the flange is performed by the normal bending mold 25, the lower bending mold 25 is detached from the plate material before the bending is finished. For this reason, as shown in FIG. 6B, when the flange is bent for a short time, if it is bent using the lower auxiliary mold 35, the bending can be performed substantially at a right angle. Although not shown, the upper auxiliary mold 33 can be used to perform a short downward bending of the flange.
[0036]
As described above, the upper and lower auxiliary molds 33 and 35 can be used for partial bending, short bending of the flange, or unloading of the processed product, and no special conveying means is required, resulting in cost reduction.
[0037]
7 and 8 show another embodiment. In this embodiment, the lower auxiliary mold 35B can be switched between a machining posture and a retracted posture.
[0038]
That is, an arm 49 that supports the lower auxiliary die 35B is rotatably provided on the bearing member 51 provided on the nod portion 31 of the bend beam 29 via the shaft 53. A lever 55 is integrally provided at one end of the shaft 53, while a fluid pressure cylinder 59 is rotatably provided as an auxiliary mold turning actuator on a bracket 57 provided on one side of the bend beam 29. It has been. A fork end 63 provided at the tip of the piston rod 61 of the fluid pressure cylinder 59 is rotatably attached to a pin 65 provided on the lever 55.
[0039]
With the above-described configuration, as the operation, referring to FIG. 9 together, the lower auxiliary die 35B is moved by the operation of the fluid pressure cylinder 59 (the position indicated by the solid line in FIG. 9) and the retracted position (2 in FIG. To the position indicated by the dotted line).
[0040]
That is, when using the lower auxiliary mold 35B is a state of abutting on the lower bending mold 25, the leading end portion of the distal end portion and the lower auxiliary die 35B of the lower bending molds 25 is located a predetermined distance upward Since it is located at the same coordinate in the front-rear direction, the lower auxiliary mold 35B can be positioned at a predetermined position by controlling the bend beam 29 as usual. In this embodiment, the lower auxiliary mold 35B is not automatically moved in the longitudinal direction, and the lower auxiliary mold 35B is manually attached at a predetermined position.
[0041]
The present invention is not limited to the embodiment of the invention described above, and can be implemented in other modes by making appropriate modifications.
[0042]
【The invention's effect】
As will be understood from the above description of the embodiment, according to the present invention , the upper and lower auxiliary molds are provided in contact with the upper and lower bending molds in the bend portion of the bend beam. The upper and lower auxiliary molds can be exchanged and can be positioned at a predetermined bending position in order to be able to cope with the partial bending length of the plate material with respect to the bend beam. Further, by moving the upper and lower auxiliary molds, the processed product can be carried out from the plate bending machine.
[0043]
Thus, it is possible to handle special bending without losing versatility, and it is also possible to carry out processed products.
[0044]
Further , a lower auxiliary die that can be positioned at the machining position and the retracted position is provided in the bend portion of the bend beam. For this reason, since the lower auxiliary mold is positioned at the processing position when in use and is at the retracted position when not in use, the lower auxiliary mold does not get in the way when bending with the upper and lower bending molds.
[0045]
Furthermore , the upper and lower auxiliary molds are positioned in the left-right direction by moving the upper and lower auxiliary molds in the left-right direction via the chain by driving the drive motor, and positioning them at a predetermined position or carrying out processed products. You can do it. Therefore, it is possible to reliably position the upper auxiliary mold and carry out the product with a simple configuration.
[Brief description of the drawings]
FIG. 1 is a side view of an upper and lower auxiliary mold showing the main part of the present invention.
2 is a front view of the upper auxiliary mold in FIG. 1. FIG.
FIG. 3 is a bottom view in FIG. 2;
FIG. 4 is an operation explanatory diagram.
FIG. 5 is an operation explanatory diagram.
FIG. 6 is an operation explanatory diagram.
7 is a cross-sectional view taken along the line VII-VII in FIG. 8, showing a lower auxiliary mold and a driving member showing another embodiment.
FIG. 8 is a side view showing a lower auxiliary mold and a drive member.
FIG. 9 is an operation explanatory diagram.
FIG. 10 is an explanatory side view showing a plate material bending machine and a plate material carry-in device according to one embodiment of the present invention.
11 is an explanatory diagram of a planar arrangement in FIG.
FIG. 12 is a perspective explanatory view of a bent product, showing a conventional example.
FIG. 13 is a perspective explanatory view showing a conventional example and showing a defect of a bent product.
FIG. 14 is a perspective explanatory view showing a conventional example and showing a bending state.
FIG. 15 is an explanatory perspective view showing a conventional example and showing a problem during bending.
FIG. 16 is an explanatory side view showing a bending state when a bending flange is small, showing a conventional example.
FIG. 17 is a perspective explanatory view of a product with a large amount of partial bending, showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sheet | seat bending machine 25 Normal bending die 27 Reverse bending die 29 Bend beam 31 Nod part 33 Upper auxiliary die 35, 35A, 35B Lower auxiliary die 41 Drive motor (drive member)
47 Chain (drive member)
59 Fluid pressure cylinder (actuator)

Claims (5)

  When bending a workpiece by providing a pair of upper and lower auxiliary dies at the bend of the bend beam provided with a pair of upper and lower bending dies, the upper and lower auxiliary dies are predetermined in the left-right direction. A bending process in which the plate material is partially bent at a predetermined position by the vertical movement of the bend beam on the plate material, and the processed product is carried out from the plate material bending machine by the upper and lower auxiliary dies. And a carrying-out process. In a plate material bending machine equipped with a bend beam provided with a pair of upper and lower bending molds that can be moved up and down, in the position of the upper and lower bending molds in contact with the top of the bending beam , The front / rear direction position of the tip is located at the same coordinate as the front / rear direction coordinate of the upper / lower bending mold, and a lower auxiliary mold is provided. A bending apparatus for a plate bending machine, wherein the bending length is the same as a predetermined bending length of the plate material and is positioned at a predetermined position. A plate bending machine equipped with a bend beam provided with a pair of upper and lower bending molds, and a working position and a retreat position in contact with the tip of the lower bending mold in the bend portion of the bend beam A lower auxiliary die that can be positioned by an actuator is provided , and the front-rear direction position of the tip of the lower bending die and the front-rear direction position of the front end portion of the lower auxiliary die are located at the same coordinates at the processing position. bending the plate material folded and wherein the are machine bending device. 3. The bending apparatus for a plate bending machine according to claim 2 , wherein the upper and lower auxiliary molds are provided so as to be movable by a drive member in the left-right direction. 5. The bending apparatus for a plate bending machine according to claim 4 , wherein the drive member comprises a chain connected to the upper and lower auxiliary molds, and a drive motor for running the chain. .

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