JP2004237286A - Press brake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press brake in which a die replacing apparatus is provided with a die cleaner. <P>SOLUTION: An upper die apparatus 15 for mounting/demounting and replacing an upper die P for an upper table 5 in the press brake is provided movably in right and left directions on the rear side of the upper table 5. A lower die apparatus 19 for mounting/demounting and replacing a lower die D for a lower table 7 in the press brake is provided movably in right and left directions on the rear side of the lower table 7. The die cleaner 21 for cleaning the bending sections of the upper and lower dies P, D is provided on at least one of the apparatuses 15, 19, and a cleaning tool of the cleaner 21 consists of a rotating brush 37 and is vertically movable. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a press brake, and more particularly, to a mold for exchanging upper and lower dies with respect to upper and lower tables, and for cleaning a bent portion of the upper and lower dies. The present invention relates to a press brake provided with a mold cleaning device.
[0002]
[Prior art]
2. Description of the Related Art A configuration in which upper and lower dies are automatically attached to and detached from upper and lower tables in a press brake is known (for example, see Patent Document 1). In addition, a configuration for cleaning a bent portion of a die above and below a press brake is also known (for example, see Patent Document 2).
[0003]
[Patent Document 1]
Re-published patent WO00 / 41824
[0004]
[Patent Document 2]
Japanese Patent Publication No. Hei 3-35015 [0005]
[Problems to be solved by the invention]
The invention described in Patent Document 1 has a configuration in which upper and lower mold exchanging devices that perform attachment / detachment / exchange of dies with respect to upper and lower tables are movably provided in the left and right directions behind the upper and lower tables in a press brake. This is useful as a configuration for automatically exchanging the dies for the upper and lower tables.
[0006]
However, the configuration described in Patent Literature 1 does not include a mold cleaning device for cleaning the bent portions of the upper and lower dies, and thus the cleaning of the bent portions of the dies is performed manually. There is a problem that it is a troublesome task that must be performed.
[0007]
In the invention described in Patent Document 2, a mold cleaning device for cleaning bent portions of upper and lower dies mounted on upper and lower tables in a press brake is provided on a rear side of an upper table in a lateral direction. Since it is configured to be movable, it is useful for cleaning the bent portions of the upper and lower dies.
[0008]
By the way, based on the invention described in Patent Document 1 and the invention described in Patent Document 2, when it is attempted to manufacture a press brake including a mold exchanging device and a mold cleaning device, the press brake is movable in the left-right direction. The mold changing device and the mold cleaning device movable in the left-right direction must be provided so as not to interfere with each other.
[0009]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems as described above, and the invention according to claim 1 has an upper table having an upper mold detachably replaceable and a work in cooperation with the upper mold. A lower table which is provided with a lower mold for detachably replacing a lower mold for performing bending of the upper table and a lower table which is provided so as to be vertically movable, and wherein one of the upper table and the lower table is provided so as to be vertically movable; An upper mold exchanging device for detaching and replacing the upper mold is provided movably in the left-right direction on the rear side of the upper table, and for attaching and detaching the lower mold to and from the lower table. The lower die changing device is provided on the rear side of the lower table so as to be movable in the left-right direction, and at least one of the upper die changing device and the lower die changing device has a bent portion in the upper and lower dies. Qing A configuration in which a mold cleaning apparatus for performing.
[0010]
The invention according to claim 2 is an upper table having an upper mold detachable and exchangeable, and a lower table having a lower mold detachably exchangeable for bending a work in cooperation with the upper mold. A back cage device for positioning a work to be bent by the upper and lower dies in a front-rear direction in a press brake in which the upper and lower tables are provided so as to be able to move vertically. A mold cleaning device for cleaning a bent portion of the upper and lower molds is provided with a left and right movable body having a work contact portion capable of contacting the work. This is a configuration provided for a moving object.
[0011]
According to a third aspect of the present invention, in the press brake according to the first or second aspect, the cleaning tool in the mold cleaning device includes a rotating brush and is configured to be vertically movable.
[0012]
According to a fourth aspect of the present invention, in the press brake according to the third aspect, an air nozzle for cleaning the inside of the V groove in the lower mold is provided near the rotary brush.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a press brake according to an embodiment of the present invention will be described with reference to the drawings. Since the entire configuration of the press brake is publicly known from Patent Literature 1, the press brake will be conceptually and schematically described.
[0014]
Referring to FIG. 1, a press brake 1 includes an upper table 5 supported on upper portions of left and right side frames 3L and 3R, and a lower table supported on lower portions of the side frames 3L and 3R opposite to the upper table 5. In this example, the lower table 7 is provided so as to be vertically movable. An upper die (punch) P is detachably mounted on an upper die mounting portion 9 provided below the upper table 5, and a lower die mounting portion 11 provided above the lower table 7 has A lower die (die) D for bending the work W in cooperation with the punch P is detachably mounted.
[0015]
On the upper side of the upper side of the upper table 5 of the press brake 1 (right side in FIG. 2), an exchangeable upper die supporting member 13 which detachably supports a plurality of punches P to be attached and detached is provided so as to be vertically movable. At the same time, a punch (upper mold) P is attached and detached and exchanged between the exchange upper mold support member 13 and the upper mold mounting portion 9 of the upper table 5 at the rear lower portion of the upper table 5. The upper die changing device 15 is provided so as to be movable in the left-right direction (in FIG. 2, a direction perpendicular to the paper surface).
[0016]
On the rear side of the lower table 7, an exchange lower mold support member 17 that detachably supports a plurality of dies D to be attached and detached is provided so as to be vertically movable, and a lower mold of the lower table 7 is provided. A lower mold exchanging device 19 for performing attachment / detachment exchange of the die D between the support member 11 and the exchange lower mold support member 17 is provided movably in the left-right direction.
[0017]
Since the upper and lower dies P and D, the upper and lower exchange mold support members 13 and 17 and the upper and lower mold exchange devices 15 and 19 have a known configuration according to Patent Document 1, the upper and lower exchange dies are used. A detailed description of the configuration and operation of the support members 13 and 17 and the upper and lower mold changing devices 15 and 19 will be omitted.
[0018]
In order to clean the bent portions of the upper and lower dies (punches and dies) P and D mounted on the upper and lower tables 5 and 7, the lower die changing device 19 is provided with a die cleaning device 21. I have.
[0019]
More specifically, as shown in FIG. 3, a swing bracket 25 swings vertically through a hinge pin 27 above an L-shaped support bracket 23 attached to a part of the lower mold exchanging device 19. It is movably supported. A swing actuator 29, such as an air cylinder, is interposed between the lower portion of the support bracket 23 and the swing bracket 25 to swing the swing bracket 25 up and down.
[0020]
The swing bracket 25 supports a rotation operating device 33 (see FIG. 4) including a motor 31 such as an air motor, for example. As a cleaning tool for cleaning the bent portions of the dies P and D, a rotary brush 37 is detachably mounted via a fixing tool such as a mounting screw.
[0021]
Further, an air nozzle 39 (see FIG. 4) for injecting air for cleaning the inside of the V groove in the lower mold D is mounted on the swing bracket 25 in proximity to the rotating brush 37. .
[0022]
With the above configuration, when the swing actuator 29 is operated to swing the swing bracket 25 downward, the rotation operating device 33 supported by the swing bracket 25 swings downward, and the rotation operating device 33 The rotating brush 37 attached to the rotating shaft 35 comes into contact with the bent portion of the V groove provided on the upper part of the lower mold D mounted on the lower table 7.
[0023]
Therefore, by rotating the rotating brush 37 by the motor 31 and moving the lower mold exchanging device 19 in the left-right direction, the bent portion of the lower mold D can be cleaned. The metal powder, dust, and the like that have fallen and remain in the V groove of the lower mold D while being cleaned by the rotating brush 37 are blown off by the air jetted from the air nozzle 39. The inside of the V groove can be more reliably cleaned.
[0024]
As described above, when the bent portion of the lower die D is cleaned by the rotating brush 37, the lower table 7 is raised, and the lower bent portion of the upper die P comes into contact with the rotary brush 37. With such positioning, the bent portions of the upper and lower molds P and D can be simultaneously cleaned by the rotating brush 37.
[0025]
The mold cleaning device 21 may be provided in the upper mold exchanging device 15 in a vertically symmetric manner in accordance with the above configuration. At this time, the upper and lower mold exchanging devices 15 and 19 are separately provided with mold cleaning devices, respectively, so that the bent portions of the upper and lower molds P and D can be separately cleaned. .
[0026]
Referring again to FIG. 2, a back gauge for positioning the work W to be bent by the upper and lower dies P and D in the front-rear direction (left-right direction in FIG. 2) is provided on the rear side of the lower table 7. An apparatus 41 is provided.
[0027]
More specifically, left and right guide members 43 long in the front-rear direction are supported in a cantilever manner near both sides of the rear surface of the lower table 7 in the left-right direction (the direction perpendicular to the paper surface in FIG. 2). The right and left slide members 47 each having a column 45 are supported by the guide member 43 so as to be movable back and forth. The left and right cylindrical members 49 rotatably supported by the left and right columns 45 support a guide beam 51 that is long in the left and right direction.
[0028]
On the guide beam 51, a plurality of left and right moving bodies 55 each having a work contact portion 53 that contacts the work W and positions the work W in the front-rear direction are supported movably in the left and right direction. That is, the left and right moving bodies 55 are movably supported by left and right guide members 57 provided on the guide beam 51. In order to move the left and right moving body 55 in the left and right direction along the guide portion 57, a moving actuator 59 such as a motor is mounted on each of the left and right moving bodies 55, and the left and right moving bodies 55 are rotated by the moving actuator 59. The pinion 61 is engaged with a left-right rack 63 provided on the guide beam 51.
[0029]
Therefore, the left and right slide members 47 are moved and positioned in the front and rear direction along the left and right guide members 43, and the plurality of left and right moving bodies 55 supported by the guide beams 51 are moved and positioned in the left and right direction along the guide portions 57. Thereby, the work contact portion 53 provided on the left and right moving body 55 can be moved and positioned at a desired position in the front-rear direction and the left and right direction, and the work W comes into contact with the work contact portion 53 at the positioned position. Thus, the work W can be positioned in the front-rear direction.
[0030]
The left-right moving means for actively moving the left-right moving body 55 in the left-right direction is not limited to the pinion 61 of the actuator 59, the rack 63, etc., but may be a configuration using an endless belt, a linear motor, or the like. , And various configurations can be adopted.
[0031]
A mold cleaning device 65 similar to the mold cleaning device 21 is mounted on each of the left and right moving bodies 55. That is, a small motor 73 having a rotating brush 71 is mounted on the tip side of a bell-crank-shaped swinging member 69 that is swingably supported in the vertical direction via the pivot 67 on the left and right moving body 55. In addition, an air nozzle (not shown) similar to the air nozzle 39 is mounted near the rotating brush 71. An actuator 73 such as an air cylinder mounted on the left and right moving body 55 is connected to the rear end of the swing member 69 to swing the swing member 69 up and down.
[0032]
With the above configuration, the slide member 47 is positioned at the forward position (the leftward position in FIG. 2) approaching the lower mold D, and the actuator 75 is operated to swing the swing member 69 downward. Then, the motor 73 is driven while the rotating brush 71 is in contact with the upper bent portion of the lower mold D, and the moving actuator 59 is operated to move the left-right moving body 55 in the left-right direction. Thus, the bent portion of the mold can be cleaned in the same manner as described above.
[0033]
As can be understood from the above description, cleaning of the bent part of the mold is performed on the left and right movable body that is movable in the left and right direction in the mold changing device or the back gauge device that is movable in the left and right direction in the press brake. Since the mold cleaning device is provided, there is no need to specifically move the mold cleaning device in the left-right direction, and the mold cleaning device has a relatively simple structure with respect to the press brake. Thus, it can be easily provided, and the conventional problem as described above can be solved.
[0034]
【The invention's effect】
As understood from the above description, according to the present invention, it is possible to provide a mold cleaning device using a mold changing device provided on the press brake so as to be movable in the left-right direction. This can solve the problem.
[Brief description of the drawings]
FIG. 1 is an explanatory front view of a press brake according to an embodiment of the present invention.
FIG. 2 is an explanatory side view showing a main part of the above.
FIG. 3 is an explanatory side view showing a state in which a mold cleaning device is mounted on the mold changing device.
FIG. 4 is an explanatory plan view of a main part of the above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Press brake 5 ... Upper table 7 ... Lower table 9 ... Upper die mounting part 11 ... Lower die mounting part 15 ... Upper die changing device 19 ... Lower die changing device 21 ... Mold cleaning device 23 ... Support bracket 25 ... Swing bracket 29 ... Swing actuator 33 ... Rotating actuator 37 ... Rotating brush 39 ... Air nozzle 41 ... Back gauge device 51 ... Guide beam 53 ... Work contact part 55 ... Left and right moving body 65 ... Die cleaning device 71 ... Rotation brush

Claims (4)

An upper table provided with an upper mold that can be freely attached and detached and a lower table provided with a lower mold that can be attached and detached to perform a bending process of a work in cooperation with the upper mold are vertically opposed to each other. In a press brake in which one of the upper table and the lower table is provided so as to be movable up and down, an upper mold exchanging device for performing attachment / detachment exchange of an upper mold with respect to the upper table is provided at a rear side of the upper table. A lower mold exchanging device for movably attaching the lower mold to the lower table, and a lower mold exchanging device for movably attaching and detaching the lower mold to and from the lower table. A press brake, characterized in that at least one of the mold changing device and the lower mold changing device is provided with a mold cleaning device for cleaning bent portions of upper and lower molds. An upper table provided with an upper mold that can be freely attached and detached and a lower table provided with a lower mold that can be attached and detached to perform a bending process of a work in cooperation with the upper mold are vertically opposed to each other. In addition, in a press brake in which one of the upper table and the lower table is provided so as to be movable up and down, the work can be freely contacted with a back cage device that positions the work to be bent by the upper and lower dies in the front-rear direction. A left and right moving body having a work contact portion is provided so as to be movable in the left and right direction, and a die cleaning device for cleaning a bent portion in the upper and lower dies is provided in the left and right moving body. And press brake. 3. The press brake according to claim 1, wherein the cleaning tool in the mold cleaning device comprises a rotating brush and is movable in a vertical direction. 4. 4. The press brake according to claim 3, wherein an air nozzle for cleaning the inside of the V groove in the lower mold is provided near the rotary brush.

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