JP2013126675A - Workpiece bending angle measuring device and press brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece bending angle measuring device with a simple structure, which is provided with a workpiece navigation function and a workpiece bending angle measuring function.SOLUTION: The device includes: a workpiece abutment portion 39 on which a workpiece W is allowed to abut for positioning the workpiece; a workpiece bending angle measuring unit 41 for measuring a bending angle of the workpiece; a first moving positioning unit 43 for moving and positioning the workpiece abutment portion and the workpiece bending angle measuring unit in an extending direction of a workpiece bending line; and a second moving and positioning unit 45 for moving and positioning the workpiece abutment portion and the workpiece bending angle measuring unit to operation positions PS5, PS7 or retreat positions PS6, PS8 respectively in a direction crossing the extending direction of the workpiece bending line.

Description

  The present invention relates to a work bending angle measuring device and a press brake, and more particularly to a work bending function and a work bending angle measuring function.

  Conventionally, a press brake having a work navigation function is known.

  The work navigation function is a function for positioning the work (material) in the longitudinal direction of the die (the extending direction of the bending line of the work) installed on the lower table of the press brake.

  Specifically, the workpiece abutment on which the workpiece is abutted for positioning is moved and positioned in the longitudinal direction of the die installed on the lower table.

  By abutting (abutting) the workpiece against the workpiece abutment that has been moved and positioned, the bending position of the workpiece is indicated, and unstable workpiece installation work (installation work on the die installed on the lower table) is performed. I am assisting.

  Conventionally, a press brake including a workpiece bending angle measuring device that measures a bending angle of a workpiece is known (see, for example, Patent Document 1).

  This workpiece bending angle measuring device includes a workpiece bending angle measuring unit for measuring the bending angle of a workpiece. The workpiece bending angle measuring section is moved and positioned in the longitudinal direction of the die installed on the lower table of the press brake, similarly to the workpiece abutment of the workpiece navigation function.

  The workpiece is bent by a die installed on the lower table and a punch installed on the upper table while monitoring the workpiece bending angle with the workpiece bending angle measuring device.

International Publication No. 2006/070822 Pamphlet

  By the way, there is a problem that it is difficult to install a work bending angle measuring device on the press brake having the conventional work navigation function.

  In other words, if the press brake is provided with a workpiece abutment that moves in the longitudinal direction of the die and a workpiece bending angle measuring unit that also moves in the longitudinal direction of the die, the configuration of the apparatus becomes complicated. At the same time, the workpiece abutment and the workpiece bending angle measurement unit interfere with each other, making it difficult to coexist the workpiece abutment and the workpiece bending angle measurement unit.

  The present invention has been made in view of the above problems, and has a simple configuration of a workpiece bending angle measuring device having a workpiece navigation function and a workpiece bending angle measuring function, and a press brake having the workpiece bending angle measuring device, The purpose is to provide.

  The invention according to claim 1 is a workpiece bending angle measuring device that measures a bending angle of the workpiece when bending the workpiece using a mold, and before bending the workpiece, In order to position the workpiece in the extending direction of the bend line, a workpiece abutting portion against which the workpiece is abutted, a workpiece bending angle measuring unit for measuring the bending angle of the workpiece, and the extending direction of the bend line of the workpiece The workpiece abutting portion and the workpiece bending angle in a direction intersecting with a first movement positioning portion for moving and positioning the workpiece abutting portion and the workpiece bending angle measuring portion, and a bending line extending direction of the workpiece. A workpiece bending angle measuring device having a second moving positioning unit that moves and positions the measuring unit to an operating position or a retracted position.

  According to a second aspect of the present invention, in the workpiece bending angle measuring device according to the first aspect, the second movement positioning portion includes a workpiece abutting portion movement positioning portion that moves and positions the workpiece abutting portion, and this A workpiece bending angle measuring device comprising a workpiece bending angle measuring unit moving positioning unit that moves and positions the workpiece bending angle measuring unit separately from the workpiece abutting unit moving positioning unit.

  According to a third aspect of the present invention, in the workpiece bending angle measuring device according to the first aspect, the second movement positioning unit moves and positions the workpiece abutting unit and the workpiece bending angle measurement unit simultaneously. This is a workpiece bending angle measuring device configured as described above.

  Invention of Claim 4 is a workpiece | work bending angle measuring apparatus of any one of Claims 1-3. WHEREIN: The said workpiece | work abutting part makes the said metal mold | die the extending direction of the bending line of the said workpiece | work. Therefore, the workpiece bending angle measuring device is configured to change to a die abutting portion against which the die is abutted.

  The invention according to claim 5 is the workpiece bending angle measuring device according to any one of claims 1 to 4, wherein the workpiece abutting portion abuts the workpiece at one location, or It is a workpiece bending angle measuring device configured to be able to switch between whether a workpiece is abutted at a plurality of locations.

  According to a sixth aspect of the present invention, there is provided a press for bending a workpiece using the first mold set on the first table and the second mold set on the second table. The brake is a press brake having the workpiece bending angle measuring device according to any one of claims 1 to 5.

  According to the present invention, there is an effect that it is possible to provide a workpiece bending angle measuring device having a simple configuration having a workpiece navigation function and a workpiece bending angle measuring function, and a press brake having the workpiece bending angle measuring device. .

It is a figure which shows schematic structure of the press brake provided with the workpiece | work bending angle measuring apparatus which concerns on the 1st Embodiment of this invention. It is II arrow directional view in FIG. It is a figure which shows schematic structure of the workpiece | work bending angle measuring apparatus which concerns on the 1st Embodiment of this invention. It is IV arrow line view in FIG. FIG. 4 is a view taken in the direction of arrow V in FIG. 3. It is VI arrow directional view in FIG. It is a VII arrow line view in FIG. It is a figure which shows the measurement principle of the bending angle of the workpiece | work using a workpiece | work bending angle measurement part. It is a figure which shows operation | movement of the press brake provided with the workpiece | work bending angle measuring apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows operation | movement of the press brake provided with the workpiece | work bending angle measuring apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows schematic structure of the workpiece | work bending angle measuring apparatus which concerns on the 2nd Embodiment of this invention, (b) is a figure corresponding to FIG. 3, (a) is a XIA arrow line view in (b). is there. It is a figure which shows schematic structure of the workpiece | work bending angle measuring apparatus which concerns on the 2nd Embodiment of this invention, (b) is a figure corresponding to FIG. 3, (a) is a XIIA arrow line view in (b). is there.

[First Embodiment]
The workpiece bending angle measuring device 11 according to the first embodiment of the present invention is used by being installed in a press brake 1, for example. The workpiece bending angle measuring device 11 installed in the press brake 1 is composed of a die (for example, a die D and a punch P; a metal made of tool steel or the like as well as ceramics) installed in the press brake 1. The bending angle of the workpiece W is measured when bending the plate-like workpiece W (the plate-like portion of the workpiece) using the workpiece.

  Here, the press brake 1 will be described in detail.

  As described above, the press brake (work bending machine) 1 uses a first die (for example, die D) and a second die (for example, punch P) to bend the work W. is there.

  Hereinafter, for convenience of explanation, one horizontal direction is defined as an X-axis direction, another horizontal direction perpendicular to the X-axis direction is defined as a Y-axis direction, and orthogonal to the X-axis direction and the Y-axis direction. The direction (vertical direction) to be used is the Z-axis direction. The X-axis direction is the left-right direction of the press brake 1, and the Y-axis direction is the front-rear direction of the press brake 1.

  As shown in FIGS. 1 and 2, the press brake 1 includes a first mold installation body (for example, a lower table) 5 supported by the frame 3, a second mold installation body (for example, an upper table) 7, The crowning device 9, the workpiece bending angle measuring device 11, and the control device 15 are provided.

  A flat rear support plate 17 is integrally provided on the lower front side of the frame 3. A front support plate 19 having substantially the same shape as the rear support plate 17 is provided on the front side of the rear support plate 17. The thickness direction of the rear support plate 17 and the front support plate 19 is the Y-axis direction. When viewed from the Y-axis direction, the rear support plate 17 and the front support plate 19 are substantially overlapped with each other, and are developed in the YZ center plane (including the center of the press brake 1 in the Y-axis direction and the Z-axis direction). The planar upper end surface of the rear support plate 17 and the planar upper end surface of the front support plate 19 extend in a straight line in the X-axis direction.

  The front support plate 19 is supported by the rear support plate 17 via a spacer 21. As a result, a predetermined gap (gap whose dimension in the Y-axis direction is equal to the thickness of the spacer 21) 23 is formed between the rear support plate 17 and the front support plate 19.

  Further, a through hole 25 for installing the crowning device 9 is formed in the rear support plate 17 and the front support plate 19. The through-hole 25 is formed in, for example, a rectangular shape, and is formed as a single or a plurality (three in FIG. 1). The through hole 25 includes a lower surface 27 that extends in the horizontal direction and an upper surface 29 that is parallel to the lower surface 27. When viewed from the Y-axis direction, the through hole 25 and the front support plate 19 of the rear support plate 17. The through holes 25 overlap each other.

  Further, when a plurality of through holes 25 are provided, the positions of the through holes 25 coincide with each other in the Z-axis direction, with a predetermined interval in the X-axis direction, and on the YZ center plane of the press brake 1. They are arranged symmetrically.

  The lower table 5 is formed in a rectangular flat plate shape, for example. The thickness dimension of the lower table 5 is slightly smaller than the dimension of the gap 23. The lower table 5 is sandwiched between the rear support plate 17 and the front support plate 19 so that the thickness direction is in the Y-axis direction, and is positioned between the rear support plate 17 and the front support plate 19. ing. However, since the thickness dimension of the lower table 5 is slightly smaller than the dimension of the gap (interval) 23, the lower table 5 is in the state of being sandwiched between the rear support plate 17 and the front support plate 19. The table 5 is movable in the Y-axis direction and the Z-axis direction with respect to the rear support plate 17 and the front support plate 19.

  When viewed from the Y-axis direction, the dimension of the lower table 5 in the X-axis direction is slightly smaller than the dimensions of the rear support plate 17 and the front support plate 19 in the X-axis direction. The both ends of the lower table 5 in the X-axis direction are positioned outside the through hole 25. When viewed from the Y-axis direction, the planar upper end surface and the planar lower end surface of the lower table 5 extend linearly in the X-axis direction. Further, when viewed from the Y-axis direction, the planar upper end surface of the lower table 5 is located above the upper end surfaces of the rear support plate 17 and the front support plate 19, and The end face is located in the middle of the through hole 25 in the Z-axis direction. Thereby, when viewed from the Y-axis direction, a part of the lower table 5 is exposed at the through hole 25.

  Further, the lower table 5 has both ends in the X-axis direction via the pair of columnar shaft members (shaft members arranged symmetrically with respect to the YZ center plane) 31 and the front support plate 17 and the front side. The support plate 19 is supported. Thereby, the lower table 5 is a both-end support beam having both ends supported by the rotation support shaft. Note that the pair of shaft members 31 are located outside the through hole 25 in the X-axis direction.

  The upper table 7 is supported on the frame 3 by a linear guide bearing (not shown) on the upper front side of the frame 3. The upper table 7 is moved and positioned in the Z-axis direction (direction approaching or moving away from the lower table 5) by an actuator (such as a hydraulic cylinder) such as a servo motor 33 via a ball screw (not shown). It has become so.

  The upper table 7 is also formed in a flat plate shape, and is disposed above the lower table 5 away from the lower table 5 so that the thickness direction is the Y-axis direction. When viewed from the Y-axis direction, the upper table 7 is arranged symmetrically with respect to the YZ center plane, and the lower surface of the flat plate-like upper table 7 faces the lower surface of the lower table 5 in parallel and faces the X-axis direction. It extends in a straight line.

  The lower surface of the upper table 7 has the same length as the upper surface of the lower table 5 and is located at the same position as the lower table 5 in the X-axis direction. Furthermore, also in the Y-axis direction, the lower surface of the upper table 7 is located at the same position as the X-axis direction and the upper surface of the lower table 5.

  The servo motors 33 are provided on the left and right sides of the upper table 7 (arranged symmetrically with respect to the YZ center plane). The left servo motor 33A and the right servo motor 33B are driven substantially synchronously. When the pair of servo motors 33 (33A, 33B) is driven, the upper table 7 moves relative to the lower table 5 while the lower surface of the upper table 7 is kept substantially parallel to the upper surface of the lower table 5. It has become. Further, by stopping the driving of the servo motor 33 and preventing the rotation output shaft of the servo motor 33 from rotating (for example, by applying a servo brake to the rotation output shaft), the upper table 7 is positioned and this position is changed. To be maintained.

  Note that the lower table 5 may be moved and positioned in the Z-axis direction instead of or in addition to the upper table 7 being moved and positioned. In any case, any configuration is acceptable as long as the upper table 7 can be relatively moved and positioned in the direction in which the upper table 7 approaches and separates from the lower table 5.

  For example, a first die (for example, a die D) is detachably and integrally installed on the lower table 5 via a die holder DH. A second die (for example, punch P) is detachably and integrally installed on the upper table 7 via, for example, a punch holder PH.

  In the Y-axis direction, the center of the punch (installed punch) P installed on the upper table 7 and the center of the die (installed die) D installed on the lower table 5 coincide with each other. . In FIG. 1, the dimensions in the X-axis direction of the punch P, the punch holder PH, the die D, and the die holder DH are the same as the dimensions in the X-axis direction of the lower table 5 and the upper table 7. , The dimension in the X-axis direction of the punch P, punch holder PH, die D, and die holder DH is smaller than the dimension in the X-axis direction of the lower table 5 and the upper table 7, and the punch P, punch holder PH, die D and the die holder DH are arranged in the X-axis direction at a position biased to the center of the lower table 5 or the upper table 7 or to the left or right.

  The press brake 1 is provided with a back gauge 37. The back gauge 37 is provided on the rear side of the punch P or die D (lower table 5 or upper table 7), and is supported by the frame 3 via a linear guide bearing (not shown). The actuator can be moved and positioned with respect to the frame 3 in the Y-axis direction by an actuator.

  Then, as shown in FIG. 2, the workpiece W is placed on the die D while the upper table 7 is raised and the installed punch P is separated from the installed die D above the installed die D. One end portion (one end portion in the Y-axis direction) is abutted against the back gauge 37, and one end portion (one end portion in the X-axis direction) of the workpiece W is a workpiece of the workpiece bending angle measuring device 11 as shown in FIG. When the workpiece W is abutted against an abutting portion (a workpiece abutting portion described later in detail) 39, the workpiece W is positioned in the X-axis direction and the Y-axis direction, and the upper table 7 is lowered, the “D” -shaped “D” of the die D is formed. The workpiece W is sandwiched between the concave portion and the “V” -shaped convex portion of the punch P, and a predetermined portion of the workpiece W is bent. The bending line of the workpiece W at this time extends in the X-axis direction.

  The crowning device 9 is a device that performs crowning on the lower table 5, and includes, for example, a hydraulic cylinder 35. The hydraulic cylinder 35 is installed in each of the through holes 25 of the support plates 17 and 19. The lower end of the casing of the hydraulic cylinder 35 is in contact with the lower surface of the through hole 25 and is provided integrally with the support plates 17 and 19. The tip (upper end) of the rod of the hydraulic cylinder 35 is in contact with the lower surface of the upper table 7.

  The lower table 5 is crowned by supplying compressed oil (hydraulic hydraulic oil whose pressure is higher than atmospheric pressure) to the hydraulic cylinder 35. By the crowning of the lower table 5, the lower table 5 (punch P) becomes a slightly convex curve on the upper side.

  3 to 7, the workpiece bending angle measuring device 11 includes a workpiece abutting portion 39, a workpiece bending angle measuring portion 41, a first movement positioning portion 43, and a second movement positioning portion 45. It is configured.

  The workpiece abutting portion 39 is a portion to which the workpiece W is abutted when the workpiece W is positioned in the extending direction (X-axis direction) of the bending line of the workpiece W before the workpiece W is bent. The workpiece bending angle measurement unit 41 measures the bending angle of the workpiece W.

  The first movement positioning unit 43 moves and positions the workpiece abutting unit 39 and the workpiece bending angle measurement unit 41 simultaneously in the extending direction (X-axis direction) of the bending line of the workpiece W.

  The second movement positioning unit 45 is in a direction intersecting with the extending direction of the bending line of the workpiece W (for example, an oblique direction including the Y-axis direction and the Z-axis direction) and the workpiece abutting portion 39 and the workpiece bending angle measuring unit 41. Are moved to and positioned at the operating positions PS5, PS7 or the retracted positions PS6, PS8 (the operating position and the work bending angle measuring unit 41 are positioned at the operating position or the retracted position. For example, it is linearly moved and positioned between the retracted position).

  In the operating position PS5, the workpiece abutting portion 39 exists at a position where the workpiece W placed on the die D installed in the press brake 1 abuts before being bent (see FIG. 3 and the like). Then, when the workpiece W abuts against the workpiece abutting portion 39 located at the operating position PS5, the workpiece W is positioned in the X-axis direction with respect to the die D installed in the press brake 1. ing.

  At the operating position PS7, the workpiece bending angle measuring unit 41 is bent to the bending angle of the workpiece W (bending angle near the target value, and is pressurized by the die D and the punch P installed in the press brake 1. It exists in the position which can measure the bending angle of the workpiece | work W of a state (refer FIG. 6 etc.). In the retracted positions PS6 and PS8, the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 are present at positions where they do not interfere with the workpiece W at all.

  At the operating positions PS5 and PS7, the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 are in the width direction of the die D (front-rear direction; Y-axis direction) in the vicinity of the upper surface of the die D installed in the press brake 1. In the retracted positions PS6 and PS8, the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 are obliquely below the operating positions PS5 and PS7, and are pressed. It is located further away from the die D in the width direction of the die D installed in the brake 1.

  The second movement positioning unit 45 includes a workpiece abutting unit movement positioning unit 47 and a workpiece bending angle measurement unit movement positioning unit 49. The workpiece abutting portion movement positioning portion 47 moves and positions the workpiece abutting portion 39, and the workpiece bending angle measuring portion movement positioning portion 49 is separated from the workpiece abutting portion movement positioning portion 47, and the workpiece bending angle. The measuring unit 41 is moved and positioned.

  Moreover, as shown in FIG. 3, the workpiece abutting portion 39 includes, for example, a first workpiece abutting portion 39A and a second workpiece abutting portion 39B.

  One work abutting part 39A of the two work abutting parts 39A and 38B is configured to be changed to a mold abutting part. Referring to FIG. 3, when the first workpiece abutting portion 39A is located at the position indicated by reference sign PS1, the workpiece abutting portion 39A, as its name suggests, the workpiece abutting against the workpiece W. It functions as a part. On the other hand, when the first workpiece abutting portion 39A is located at the position indicated by reference sign PS2, the workpiece abutting portion 39A functions as a mold abutting portion.

  Here, the die abutting portion refers to the die D in the extending direction of the bending line of the workpiece W (X-axis direction) when the die (for example, the die D) is installed on the lower table 5 of the press brake 1. This is the part where the die D is abutted for positioning. More specifically, when the workpiece abutting portion 39 is changed to a die abutting portion, one end portion in the longitudinal direction (X-axis direction) of the die D abuts on the workpiece abutting portion 39.

  Further, the workpiece abutting portion 39 is configured to be switchable between abutting the workpiece W at one location or abutting the workpiece W at a plurality of locations (for example, two locations).

  That is, when the first workpiece abutting portion 39A is located at the position indicated by the reference symbol PS1, and the second workpiece abutting portion 39B is located at the location indicated by the reference symbol PS3, the first workpiece abutting portion 39A is located. A workpiece (a workpiece to be bent by the press brake 1) W strikes only the contact portion 39A.

  On the other hand, when the first workpiece abutting portion 39A is located at the position indicated by the reference symbol PS1, and the second workpiece abutting portion 39B is located at the location indicated by the reference symbol PS4, the first workpiece abutting portion 39A is located. A workpiece (a workpiece to be bent by the press brake 1) W abuts against the abutting portion 39A and the second workpiece abutting portion 39B.

  In addition, when the workpiece | work abutting part 39 becomes multiple places (for example, two places), each workpiece | work abutting part 39 is a direction (for example, the bending line of the workpiece | work W, and the direction which cross | intersects the extending direction of the bending line of the workpiece | work W). Perpendicular to each other in the horizontal direction (Y-axis direction).

  The workpiece bending angle measuring device 11 will be described in more detail with reference to FIGS.

  In FIGS. 4, 5, and 7, the display of the die holder DH and the like is omitted in order to avoid complication of the drawings.

  The die holder DH includes a lower die holder DH1 and an upper die holder DH2. The lower die holder DH1 is integrally installed on the lower table 5 on the lower table 5 so that the longitudinal direction is the X-axis direction. The lower die holder DH1 is installed on the lower table 5 using fasteners such as bolts, and is easily detachable from the lower table 5. The upper boulder DH2 is also integrally and detachably installed on the lower die holder DH1 on the lower die holder DH1 so that the longitudinal direction is the X-axis direction.

  The 1st movement positioning part 43 of the workpiece | work bending angle measuring apparatus 11 is provided with the linear guide bearing 51 and the X-axis table 53, for example. The rail of the linear guide bearing 51 is provided integrally with the lower die holder DH1 via the spacer 55, and extends in the X-axis direction.

  The X-axis table 53 is supported by the lower die holder DH1 via the spacer 55 and the linear guide bearing 51. The X-axis table 53 can be moved and positioned in the X-axis direction with respect to the lower die holder DH1 (lower table 5) under the control of the control device 15 by an actuator such as a servo motor (not shown).

  Although details will be described later, since the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 are supported by the X-axis table 53, the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 are arranged in the X axis. At the same time, it is moved and positioned with respect to the lower die holder DH1 (lower table 5).

  As shown in FIG. 3 and the like, the workpiece abutting portion movement positioning portion 47 that constitutes the second movement positioning portion 45 includes, for example, a linear guide bearing 57 and a workpiece abutting table 59. The bearing of the linear guide bearing 57 is provided integrally with the X-axis table 53. The work abutting table 59 is integrally provided with a rail for the linear guide bearing 57.

  The workpiece abutting table 59 is supported by the X-axis table 53 via the linear guide bearing 57 so that the longitudinal direction is a predetermined oblique direction. The workpiece abutting table 59 can be moved and positioned in the predetermined oblique direction with respect to the X-axis table 53 under the control of the control device 15 by an actuator such as a pneumatic cylinder (not shown).

  The predetermined oblique direction does not include a vector component in the X-axis direction, and is an oblique direction including a vector component in the Y-axis direction and a vector component in the Z-axis direction, and the upper side of the workpiece abutting table 59 is It is located near the die D installed on the lower table 5 in the Y-axis direction, and the lower side of the workpiece abutting table 59 is located far from the die D installed on the lower table 5 in the Y-axis direction. is there. Further, in the predetermined oblique direction, the vector component in the Z-axis direction is larger than the vector component in the Y-axis direction.

  When the workpiece abutting table 59 is positioned at the ascending end, the workpiece abutting portion 39 is located at the operating position PS5, and the upper end of the workpiece abutting table 59 is the die D installed in the press brake 1. It is located at the same height as the top surface. On the other hand, when the workpiece abutting table 59 is located at the lower end, the workpiece abutting portion 39 is located at the retreat position PS6, and the upper end of the workpiece abutting table 59 is installed in the press brake 1. It is located below the die D.

  A workpiece abutting portion 39 is provided on the upper side of the workpiece abutting table 59. The workpiece abutting portion 39 includes a first abutting member 61 and a second abutting member 63. The first abutting member 61 is rotationally positioned with respect to the workpiece abutting table 59 with an axis C1 passing through the vicinity of the lower end of the first abutting member 61 and extending in the X-axis direction as a rotational center. It is free.

  Further, the first abutting member 61 rotates at an angle (for example, an angle of 90 °) between the position indicated by the reference sign PS1 and the position indicated by the reference sign PS2. Further, the first abutting member 61 is biased by an elastic body such as a torsion coil spring (not shown), so that the rotation is stopped at the position indicated by the reference symbol PS1 or the position indicated by the reference symbol PS2, and the press brake Unless an external force (rotational moment) is applied by the operator 1 or the like, the rotation stop position is maintained.

  When the first abutting member 61 is located at the position indicated by reference sign PS1 (standing position), the first abutting member 61 is above the upper surface of the die D installed in the press brake 1. It protrudes. Accordingly, the first abutting member 61 functions as an abutting portion (abutting portion for positioning the workpiece W) 39 of the work W placed on the die D.

  On the other hand, when the first abutting member 61 is located at the position (horizontal position) indicated by the reference sign PS2, the first abutting member 61 is more than the upper surface of the die D installed in the press brake 1. It is located below and interferes with the die D installed on the press brake 1. Thus, the first abutting member 61 functions as an abutting portion (abutting portion for positioning the mold) of the die D installed in the press brake 1.

  The second abutting member 63 is also rotatable and positionable with respect to the workpiece abutting table 59 about the axis C2 passing through the vicinity of the lower end of the second abutting member 63 and extending in the X-axis direction. It has become.

  Further, the second abutting member 63 rotates at an angle (for example, an angle of about 20 ° to 30 °) between the position indicated by the reference symbol PS3 and the position indicated by the reference symbol PS4. . Similarly to the first abutting member 61, the second abutting member 63 is biased by an elastic body such as a torsion coil spring (not shown), so that the position indicated by the reference symbol PS3 or the reference symbol PS4 is provided. The rotation is stopped at the position indicated by, and the rotation stop position is maintained unless an external force (rotational moment) is applied by the operator of the press brake 1 or the like.

  When the second abutting member 63 is located at a position (accommodating position) indicated by reference sign PS3, the second abutting member 63 is below the upper surface of the die D installed in the press brake 1. positioned.

  On the other hand, when the second butting member 63 is located at the position (projecting position) indicated by the reference sign PS4, the second butting member 63 is more than the upper surface of the die D installed in the press brake 1. Projects upward. As a result, a second abutting portion 39 (abutting portion for positioning the workpiece W) 39 placed on the die D is used together with the first abutting member 61 positioned at the position PS1. The abutting member 63 functions. In this case, the site | part with which the workpiece | work W of the 1st butting member 61 abuts and the site | part with which the workpiece | work W of the 2nd abutting member 63 abuts are separated in the Y-axis direction.

  In the Z-axis direction, the axis C1 is located above the axis C2. In the Y-axis direction, the axis C1 is located near the die D installed on the press brake 1, and the axis C2 is the press brake. 1 is located far away from the die D installed at 1. Further, in the Y-axis direction, the second abutting member 63 is located farther from the die D installed in the press brake 1 than the first abutting member 61.

  By being configured in this way, the workpiece abutting portion 39 is moved between the retracted position PS6 and the operating position PS5 by the workpiece abutting portion moving positioning portion 47. As already understood, when the workpiece abutting portion 39 is located at the retracted position PS6, the workpiece abutting members 61 and 63 do not interfere with the workpiece W or the die D. Yes.

  The workpiece bending angle measuring unit moving positioning unit 49 that constitutes the second moving positioning unit 45 is configured by, for example, using a linear guide bearing 65 and a workpiece bending angle measuring table 67 in the same manner as the workpiece abutting unit moving positioning unit 47. It is prepared for. The bearing of the linear guide bearing 65 is provided integrally with the X-axis table 53. The workpiece bending angle measuring table 67 is integrally provided with a rail for the linear guide bearing 65.

  As shown in FIG. 6, the workpiece bending angle measurement table 67 is set so that its longitudinal direction is a predetermined oblique direction (the workpiece abutting table 59 of the workpiece abutting table 59). It is supported by the X-axis table 53 via the linear guide bearing 65 (in parallel with the longitudinal direction). The work bending angle measuring table 67 is slightly separated from the work abutting table 59 in the X-axis direction. The workpiece bending angle measurement table 67 can be moved and positioned in the predetermined oblique direction with respect to the X-axis table 53 under the control of the control device 15 by an actuator such as a pneumatic cylinder (not shown).

  A workpiece bending angle measurement unit 41 is provided at the upper end of the workpiece bending angle measurement table 67. When the workpiece bending angle measurement table 67 is positioned at the rising end, the workpiece bending angle measuring unit 41 is positioned at the operating position PS7, and the workpiece bending angle measuring unit 41 can measure the bending angle of the workpiece W. It can be done. On the other hand, when the work bending angle measurement table 67 is located at the descending end, the work bending angle measurement unit 41 is located at the retracted position PS8, and the work bending angle measurement unit 41 does not interfere with the work W. ing.

  By being configured in this manner, the workpiece bending angle measuring unit 41 is separated from the workpiece abutting unit 39 by the workpiece bending angle measuring unit moving positioning unit 49 between the retracted position PS8 and the operating position PS7. Is supposed to move.

  Here, the workpiece bending angle measurement unit 41 will be described in more detail.

  As shown in FIG. 6, the workpiece bending angle measurement unit 41 includes a housing 69, a first moving body 71, and a second moving body 73.

  The casing 69 is provided integrally with the work bending angle measurement table 67. The first moving body 71 is formed in a cylindrical shape, for example. For example, the second moving body 73 is formed in a columnar shape whose outer diameter is smaller than the outer diameter of the first moving body 71.

  Each of the moving bodies 71 and 73 is provided in the housing 69 so that the central axes thereof coincide with each other. The first moving body 71 protrudes upward from the upper end of the housing 69 provided integrally with the workpiece bending angle measurement table 67, and the second moving body 73 is the first moving body 71. Projects upward from the upper end. Each moving body 71, 73 has its central axis extending in the Z-axis direction.

  The first moving body 71 is supported by the housing 69 via a linear guide bearing (not shown), and is movable with respect to the housing 69 in the Z-axis direction. Further, the first moving body 71 is biased upward by an elastic body such as a spring (not shown) or an actuator such as a pneumatic cylinder. It does not move. Further, the position of the first moving body 71 relative to the housing 69 is detected by a linear encoder (not shown). The detected value is input to the control device 15.

  Similarly to the first moving body 71, the second moving body 73 is also supported by the first moving body 71 (may be the casing 69) via a linear guide bearing (not shown). The first movable body 71 is movable. Similarly to the first moving body 71, the second moving body 73 is biased upward by an elastic body such as a spring (not shown) or an actuator such as a pneumatic cylinder, but abuts against a stopper (not shown). Thus, it does not move above a predetermined position. Further, the position of the second moving body 73 with respect to the first moving body 71 is detected by a linear encoder (not shown) in the same manner as the first moving body 71. The detected value is input to the control device 15.

  Here, the principle of measuring the bending angle of the workpiece W in the workpiece bending angle measuring unit 41 will be described. As shown in FIG. 8, the workpiece bending angle measurement unit 41 is provided on the center plane of the die D installed in the press brake 1 (a plane extending through the center of the die D in the X-axis direction and the Z-axis direction). On the other hand, it is installed symmetrically. Accordingly, the first movement positioning unit 43 and the workpiece bending angle measurement unit movement positioning unit 49 are also provided symmetrically with respect to the center plane. It is assumed that the workpiece abutting portion 39 and the workpiece abutting portion movement positioning portion 47 are provided only on one side (front side; operator side of the press brake 1) with respect to the center plane.

  The pair of workpiece bending angle measuring units 41 are assumed to be moved and positioned synchronously. That is, it is assumed that the pair of workpiece bending angle measuring units 41 are always located symmetrically with respect to the center plane.

  When the bending angle of the workpiece W is measured by the pair of workpiece bending angle measuring units 41, the distances ΔY1 and ΔZ1 on one side are measured as shown in FIG. Find θ1. Similarly, the distances ΔY2 and ΔZ2 on the other side are measured, and the angle θ2 is obtained from this measured value. The bending angle θ (θ = 180 ° −θ1−θ2) of the workpiece W is determined from the determined angles θ1 and θ2.

  Note that one workpiece bending angle measuring unit 41 of the pair of workpiece bending angle measuring units 41 is deleted, and only the other workpiece bending angle measuring unit 41 is used to bend the workpiece W bending angle θ (θ = 180 °). -2 × θ1) may be obtained.

  Further, as the workpiece bending angle measurement unit 41, another configuration (for example, one shown in FIG. 4 of International Publication No. 2006/070822 pamphlet) may be adopted.

  Next, the operation of the press brake 1 will be described.

  The press brake 1 operates as follows under the control of a control device (control unit) 15 having a CPU according to an operation program stored in advance in the memory 13 (see FIG. 1). In other words, the control unit 15 controls the upper table 7, the workpiece bending angle measuring unit 41, the moving positioning units 43 and 45, etc. as follows, and performs bending on the workpiece W.

  First, the program for bending the workpiece W is stored in the memory 13 of the control device 15, the punch P is not installed on the upper table 7, the die D is not installed on the lower table 5, The upper table 7 is raised, the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 are positioned at a predetermined default position by the first movement positioning portion 43, and the second movement positioning portion 45 A state where the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 are located at the retracted position (a state where the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 are located at the retracted positions PS6 and PS8). Set to the initial state.

  In this initial state, when the work abutting portion 39 is manually changed to the die abutting portion by the operator (may be changed automatically) and a start switch (not shown) is pressed, the first movement positioning is performed. The workpiece abutting portion (die abutting portion) 39 is moved and positioned at the operating position (position where the die D is abutted for positioning the die D) PS5 by the portion 43 and the workpiece abutting portion moving positioning 47 portion. The

  An operator installs the die D at a predetermined position of the lower table 5 by abutting the die D against the mold abutting portion 39 that is moved and positioned, and the upper table 7 is positioned at a predetermined position according to the position of the die D. A punch P is installed (see FIG. 9A), and the mold abutting portion 39 is manually changed to the workpiece abutting portion 39 by an operator (may be automatically changed), if necessary. After the number of workpiece abutting portions 39 is set (see FIG. 9B; automatic installation may be performed), when a start switch (not shown) is pressed, the first movement positioning portion 43 and The workpiece abutting portion 39 is moved and positioned at the operating position PS5 by the workpiece abutting portion movement positioning portion 47. The back gauge 37 is also moved and positioned at a position where the workpiece W is abutted for positioning the workpiece W to be bent.

  Subsequently, after the workpiece abutting portion 39 and the back gauge 37 are positioned, the workpiece W is manually placed on the die D by an operator, for example (it may be automatically placed using a robot or the like). The mounted workpiece W has a thickness direction in the Z-axis direction, and in the Y-axis direction, the workpiece W is positioned by abutting against the back gauge 37. In the X-axis direction, the workpiece abutting portion is positioned. 39 (positioning members 61 and 63) is positioned by abutting.

  Subsequently, when a start switch (not shown) is pressed, the workpiece W is sandwiched between the die D installed on the lower table 5 and the punch P installed on the upper table 7, and the workpiece W is slightly larger than the target angle. The upper table 7 is lowered to a predetermined position until it is bent at an angle (see FIG. 10A).

  When this lowering is finished, the workpiece abutting portion 39 is moved to the retracted position PS6 by the workpiece abutting portion movement positioning portion 47. Note that the workpiece abutting portion 39 may be moved to the retreat position PS6 at a pinching point. The pinching point is when the punch P descends and the workpiece W starts to be sandwiched between the die D and the punch P.

  In addition, before the workpiece abutting portion 39 is moved to the retracted position PS6 by the workpiece abutting portion movement positioning portion 47, the workpiece abutting portion 39 is slightly moved from the workpiece W in the X-axis direction by the first movement positioning portion 43. It is desirable to keep them apart.

  Subsequently, the upper table 7 is lowered to the above-described predetermined position, and the work W is sandwiched between the die D and the punch P, and the first movement positioning unit 43 and the work bending angle measuring unit moving positioning unit 49 are operated. The workpiece bending angle measuring unit 41 is moved and positioned at the position PS7 to measure the bending angle of the workpiece W (see FIG. 10B).

  In accordance with the measurement result, the workpiece W is bent by correcting the crowning device 9 or correcting the lowered position of the punch P by the servo motor 33.

  When the workpiece W is bent to the final bending angle (bending angle as a product or a semi-finished product) with the die D and the punch P, the workpiece bending angle with the workpiece W held between the die D and the punch P. The measuring unit 41 may be moved and positioned to measure the bending angle of the workpiece W for inspection.

  According to the press brake 1, the work abutting part (work abutting) 39 and the work bending angle measuring part 41 in the extending direction (X-axis direction) of the bending line of the work W are caused by the first movement positioning part 43. Since the positioning is simultaneously performed, the configuration of the apparatus is simplified, the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 do not interfere with each other, and the workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 It becomes easy to coexist. That is, it is possible to provide a workpiece bending angle measuring device 11 having a simple configuration having a workpiece navigation function and a workpiece bending angle measuring function.

  According to the press brake 1, the second movement positioning unit 45 includes the workpiece abutting part movement positioning unit 47 and the workpiece bending angle measurement unit movement positioning unit 49. Flexible operation with the workpiece bending angle measurement unit 41 becomes possible. For example, when the workpiece W is abutted against the workpiece abutting portion 39 and the workpiece W is positioned, if the workpiece bending angle measuring portion 41 is positioned at the retracted position PS6, the workpiece W is mistakenly measured. The risk of hitting 41 can be avoided. On the other hand, when the workpiece bending angle measuring unit 41 measures the bending angle of the workpiece W, if the workpiece abutting portion 39 is positioned at the retracted position PS8, the workpiece W can be formed even when the shape of the workpiece W is complicated. The possibility that the abutting portion 39 and the workpiece W interfere with each other is reduced.

  Moreover, according to the press brake 1, since it is comprised so that the workpiece | work abutting part 39 may change to a metal mold | die abutting part, the die | dye D can be positioned and installed with a simple structure.

  Further, according to the press brake 1, the workpiece abutting portion 39 is configured to be able to switch between abutting the workpiece W at one location or abutting the workpiece W at a plurality of locations. The workpiece W can be positioned flexibly and accurately in accordance with the change in the shape.

[Second Embodiment]
The workpiece bending angle measuring device 11a according to the second embodiment is configured such that the second movement positioning unit 45 moves and positions the workpiece abutting unit 39 and the workpiece bending angle measuring unit 41 simultaneously. The workpiece bending angle measuring device 11 is different from the workpiece bending angle measuring device 11 according to the first embodiment, and the other points are configured in the same manner as the workpiece bending angle measuring device 11 according to the first embodiment. Play.

  More specifically, as shown in FIG. 11, in the workpiece bending angle measuring device 11a according to the second embodiment, the workpiece abutting table 59 is deleted. That is, in the workpiece bending angle measuring device 11a, the workpiece bending angle measuring table 67 also serves as the workpiece abutting table 59.

  More specifically, a workpiece bending angle measurement unit 41 is provided at the upper end of the workpiece bending angle measurement table 67. Then, the workpiece W is positioned in the X-axis direction by abutting the workpiece W against the casing 69 of the workpiece bending angle measurement unit 41 (for example, a protrusion 75 provided integrally with the casing 69). (See FIG. 12 (b)). Further, when the workpiece W is bent, the projection 75 is separated from the workpiece W as shown in FIG.

  By the way, in the workpiece bending angle measuring device 11a according to the second embodiment, similarly to the workpiece bending angle measuring device 11 according to the first embodiment, the first butting member 61 and the second butting member 63 are used. The first abutting member 61 may be changed to a mold abutting portion, and the workpiece abutting portion 39 may be changed to a plurality of locations. .

  According to the workpiece bending angle measuring device 11a, the second movement positioning unit 45 is configured to simultaneously move and position the workpiece abutting unit 39 and the workpiece bending angle measuring unit 41, thereby simplifying the configuration of the device. This makes it easy to install the workpiece bending angle measuring device 11a on the press brake.

  In each of the above-described embodiments, the workpiece abutting table 59 and the workpiece bending angle measuring table 67 are moved by an actuator such as a servo motor by the workpiece abutting portion moving positioning unit 47 and the workpiece bending angle measuring unit moving positioning unit 49. The workpiece abutting portion 39 and the workpiece bending angle measuring portion 41 may be positioned at an intermediate position, and the workpiece W abutting or the workpiece W bending angle may be measured at this intermediate position.

DESCRIPTION OF SYMBOLS 1 Press brake 11 Work bending angle measuring device 39 Work abutting part 41 Work bending angle measuring part 43 1st movement positioning part 45 2nd movement positioning part 47 Work abutting part movement positioning part 49 Work bending angle measurement part movement positioning Part D Mold (die)
P Die (Punch)
PS5, PS7 Working position PS6, PS8 Retraction position W Workpiece

Claims (6)

In a workpiece bending angle measuring device that measures the bending angle of the workpiece when bending the workpiece using a mold,
Before bending the workpiece, in order to position the workpiece in the extending direction of the bending line of the workpiece, a workpiece abutting portion against which the workpiece is abutted,
A workpiece bending angle measuring section for measuring the bending angle of the workpiece;
A first movement positioning portion that moves and positions the workpiece abutting portion and the bending angle measurement portion of the workpiece in the extending direction of the bending line of the workpiece;
A second movement positioning portion that moves and positions the workpiece abutting portion and the workpiece bending angle measurement portion to an operating position or a retracted position in a direction intersecting with the extending direction of the bending line of the workpiece;
A workpiece bending angle measuring device comprising: In the workpiece bending angle measuring device according to claim 1,
The second movement positioning unit moves and positions the workpiece bending angle measuring unit separately from the workpiece abutting unit movement positioning unit that moves and positions the workpiece abutting unit, and the workpiece abutting unit movement positioning unit. A workpiece bending angle measuring device comprising a workpiece bending angle measuring unit moving positioning unit. In the workpiece bending angle measuring device according to claim 1,
The workpiece bending angle measuring device, wherein the second movement positioning unit is configured to move and position the workpiece abutting unit and the workpiece bending angle measuring unit simultaneously. In the workpiece | work bending angle measuring apparatus of any one of Claims 1-3,
The workpiece abutting portion is configured to change to a die abutting portion against which the die is abutted in order to position the die in the extending direction of the bending line of the workpiece. Work bending angle measuring device. In the workpiece | work bending angle measuring apparatus of any one of Claims 1-4,
The workpiece abutting portion is configured to be switchable between abutting the workpiece at one location or abutting the workpiece at a plurality of locations. In a press brake that bends a workpiece using the first mold installed on the first table and the second mold installed on the second table,
A press brake comprising the workpiece bending angle measuring device according to any one of claims 1 to 5.

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