JP4271010B2 - Die holder device for press brake - Google Patents

Description

  The present invention relates to a die holder device for a press brake.

Conventionally, as shown in FIG. 6 and FIG. 7, as a method of setting a 2V die 101 as a lower die having two V grooves 101 </ b> A and 101 </ b> B on the upper surface in a bending process during sheet metal processing, A die holder 105 is provided on a die base 103 attached to an omitted lower table, and a die rail 109 having a convex portion 107 on the upper surface is provided on the die holder 105 with a screw 111 in a longitudinal direction (a direction perpendicular to the paper surface in FIG. 6). In FIG. 7, it is extended and integrated in the left-right direction). And the recessed part 113 formed in the lower surface of the said 2V die | dye 101 is set by fitting to the convex part 107 of the said die rail 109. As shown in FIG.
Japanese Utility Model Publication No. 54-2739

  By the way, since there is a clearance between the concave portion 113 of the 2V die 101 and the convex portion 107 of the die rail 109 described above, there is a problem that rattling occurs between the 2V die 101 and the die rail 109. In particular, when the 2V die 101 is a divided 2V die 101 having a narrow width in the longitudinal direction, it is unstable just by placing the divided 2V die 101 on the die rail 109, and the divided 2V die 101 is bent during bending. May shift or fall over.

  Further, in step bend processing or the like, it is necessary to accurately position the 2V die 101 at the die layout position designated by the NC device. When the 2V die 101 is displaced as described above, adjacent die groups There is a problem that the workpiece interferes.

  As a method of solving the instability that is the problem, as shown in FIGS. 6 and 7, a die stopper 115 (dedicated jig) is provided at the tip of the adjustment screw 117 from both sides of the 2V die 101. The 2V die 101 is fixed by turning the knob knob 119. However, the die stoppers 115 on both sides have a problem of interfering with a workpiece during bending and a problem of troublesome fixing work.

  The present invention has been made to solve the above-described problems.

In order to achieve the problem to be solved by the above invention, a die holder device for a press brake according to the present invention is a die holder device for a press brake, wherein a concave portion formed on the lower surface of the die and a detachable convex portion are provided on the upper surface. A die rail main body provided on the upper surface of the die holder , the die rail main body includes a fixing portion having a convex portion for constituting the convex portion of the die rail main body, and the convex portion of the die rail main body. In order to fill the clearance between the concave portion of the die and the convex portion of the die rail body, the width of the convex portion of the die rail body is widened to divide the movable portion having a convex portion. The movable part is slidably provided with respect to the fixed part .

  In the press brake die holder device according to the present invention, in the press brake die holder device, the movable portion is preferably divided into a plurality of portions in the longitudinal direction.

  In the press brake die holder device according to the present invention, it is preferable that the press brake die holder device includes a scale on an upper surface of the convex portion of the die rail body.

  Furthermore, in the press brake die holder device according to the present invention, it is preferable that a tension means is provided between the fixed portion and the movable portion of the die rail body in the press brake die holder device.

  As can be understood from the means for solving the above problems, according to the present invention, the die rail main body provided with the concave portion formed on the lower surface of the die holder on the upper surface of the die holder without causing the die to shift or fall down. While being able to fix to a convex part reliably, attachment / detachment can be performed easily and workability | operativity which does not interfere with a workpiece | work can be acquired.

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

  Referring to FIG. 1, a press brake bending die 1 is composed of a bending punch die 3 and a bending die die 5. In the bending punch die 3, an upper table 7 of a press brake is provided so as to be movable up and down, for example, and a punch holder 9 is provided below the upper table 7. A punch 11 is attached to a lower portion of the punch holder 9 by a one-touch type attaching / detaching device 13 so as to be exchangeable. Since the configuration of the one-touch type attachment / detachment device 13 is already known, detailed description thereof is omitted.

  As shown in FIGS. 2, 3, and 4, the bending die mold 5 is provided with a lower table 15 of a press brake, for example, which is fixed, and a die base 16 is interposed on the lower table 15. A die holder 17 is attached. A die rail body 19 is provided on the upper surface of the die holder 17. The die holder 17 and the die rail body 19 constitute a die holder device. The die rail body 19 is divided into a fixed portion 21 and a movable portion 23. The fixing portion 21 has an L-shaped side surface, has a convex portion 25 on the upper surface, and has a plurality of fixing bolt holes 27 fixed to the die holder 17 on the lower surface in the longitudinal direction.

  The fixing portion 21 has a plurality of adjustment hexagon bolt holes 29 in the longitudinal direction on the front surface, and a stepped through hole through which a stripper bolt passes at a position offset from the adjustment hexagon bolt hole 29 on the rear surface. A plurality of 31 are provided in the longitudinal direction. As shown in FIG. 4, the front side of the stepped through hole 31 has a stepped shape to accommodate a disc spring (elastic member) 33 as a tensioning means.

  The movable portion 23 can slide on the fixed portion 21 in the front-rear direction (left-right direction in FIGS. 3 and 4). Moreover, the movable portion 23 is divided into a plurality of fixed portions 21 in the longitudinal direction as shown in FIG. Further, the upper surface of the movable part 23 has a convex part 35, that is, the convex part 35 and the convex part 25 of the fixed part 21 constitute a convex part 30 of the die rail body 19. For example, a die having two V grooves 37A and 37B is fitted into a recess 39 (longitudinal groove) of a 2V die 37, and the size of the projection 30 corresponds to the size of the recess 39. Yes.

  The fixed portion 21 and the movable portion 23 are respectively inserted with adjusting hexagon bolts 41 and stripper bolts 43 in the holes 29 and stepped through hole holes 31, respectively. The movable portion 23 is fixed by the adjusting hexagon bolts 41 and stripper bolts 43. It is slidably fixed to the flat portion of the fixed portion 21 via a disc spring (elastic member) 33 provided between the fixed portion 21 and the movable portion 23.

  With the above configuration, the fixed portion 21 and the movable portion 23 are attached with a stripper bolt 43 via a compressed disc spring (elastic member) 33, and are attached to the inside when the adjusting hexagon bolt 41 is rotated in one direction. The force of the disc spring (elastic member) 33 is released, and the width of the convex portion 30 of the die rail body 19 is widened. As a result, the clearance between the concave portion 39 of the 2V die 37 attached to the upper portion and the die rail body 19 can be filled, and the 2V die 37 can be firmly fixed and attached by a stretching action.

  Further, since the movable portion 23 is divided into a plurality of parts in the longitudinal direction as described above, the 2V die 37 that does not require attachment / detachment can be left as it is, and only the 2V die 37 can be attached / removed as necessary. .

Since the rotation amount of the adjusting hexagon bolt 41 depends on the clearance amount between the concave portion 39 of the 2V die 37 and the convex portion 30 of the die rail body 19, the 2V die 37 can be easily fixed by adjustment within half a rotation. . Conversely, when the adjusting hexagon bolt 41 is rotated in the reverse direction, the width of the convex portion 30 of the die rail body 19 by the convex portion 25 of the fixed portion 21 and the convex portion 35 of the movable portion 23 is reduced.
A clearance is generated between the width of the convex portion 30 of the die rail body 19 and the width of the concave portion 39 of the 2V die 37, and the 2V die 37 can be easily removed.

  As shown in FIG. 5, a scale 45 is provided on the upper surface of the convex portion 30 of the die rail body 19. Therefore, in the step bend processing, the 2V die 37 is accurately positioned only by placing the layout of the 2V die 37 specified by the NC device along the scale 45 provided on the upper surface of the convex portion 30 of the die rail body 19. be able to. In addition, the 2V die 37 is positioned while visually observing the scale provided on the upper table 7 of the press brake. However, since the distance between the scale and the 2V die 37 is large, accurate positioning is visually performed. It cannot be said that it is broken. Therefore, it is preferable to provide a scale on the die rail 19 or the like that can directly contact the 2V die 37, but the position where the die rail main body 19 and the 2V die 37 are in contact with each other is such that the scale is damaged because the pressure applied during processing is transmitted. There is a bug. Since the scale 45 is provided on the upper surface of the convex portion 30 of the die rail main body 19 in the present configuration, the scale 45 can be disposed between the vertical clearance with the concave portion 39 of the 2V die 37, and the applied pressure during processing is not transmitted. Also, the mold size (width length) can be easily confirmed.

It is side surface sectional drawing of the metal mold | die for press brakes which implements this invention. It is a front view of the die holder apparatus in FIG. FIG. 3 is a side view in FIG. 2. It is sectional drawing along the IV-IV line in FIG. It is the top view which showed the scale provided in the upper surface of the dial body. It is the side view which showed the conventional bending die metal mold | die. It is a front view in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press brake die 3 Bending punch die 5 Bending die die 7 Upper table 9 Punch holder 11 Punch 13 Detachment device 15 Lower table 17 Die holder 19 Die rail body 21 Fixed part 23 Movable part 25 Convex part 27 Hole 29 Hole 30 Convex Part 31 Stepped through hole 33 Disc spring (stretching means)
35 convex part 37 2V die (die)
39 Concave part 41 Hexagon bolt for adjustment 43 Stripper bolt 45 Scale

Claims (4)

A die holder device for a press brake, comprising: a die rail body provided on a top surface of a concave portion formed on a lower surface of the die; and a convex portion detachably engageable on the upper surface of the die holder. Divided into a fixed part having a convex part for constituting a part and a movable part having a convex part for constituting the convex part of the die rail body, the concave part of the die and the die rail body A press brake comprising the movable part slidably with respect to the fixed part so that a width of the convex part of the die rail body is widened to fill a clearance between the convex part. Die holder device.   The die holder device for a press brake according to claim 1, wherein the movable part is divided into a plurality of parts in the longitudinal direction.   The press holder die holder device according to claim 1, wherein a scale is provided on an upper surface of the convex portion of the die rail body.   4. The press brake die holder device according to claim 1, wherein a tension means is provided between the fixed portion and the movable portion of the die rail body.

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