JP2006326675A - Die holder unit for press brake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die holder unit for a press brake which prevents an upper die having a holding groove in a longitudinal direction from falling by about 2 mm from the die holder unit, permits mounting of the upper die not having the holding groove in the longitudinal direction as well and facilitates attaching and detaching of the upper die. <P>SOLUTION: The die holder unit has a die holding member 61 having die holding surfaces 23f, 23f disposed freely movably in and out at clamps 25, 27, and torsion pins 29, 31 which are disposed within a holder body 21 during die clamping and hold and rotate the pins energized in projecting parts energized by springs, etc., and have clamps possessing the pins whose other ends engage into the hole sections of the holder body. In the state of moving and holding the upper die to an upward direction during clamping of the upper die, the upper die is clamped and mounted to the holder body. By having the clamp, the upper die not having the holding groove 3g in the longitudinal direction can be clamped and mounted as well. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

Detailed Description of the Invention

Industrial application fields

  The present invention relates to an apparatus for holding an upper die in a machine for forming and processing a sheet metal material generally called a press brake.

As is well known, a press brake for forming a sheet metal material has an upper mold mounted on the upper table of the press brake and a lower mold mounted on the lower table of the press brake. Yes, the workpiece is machined by engaging the tip of the upper mold and the groove of the lower mold.
And the upper metal mold | die used for the said press brake is attached to the metal mold | die holder apparatus attached to the upper table of a press brake. However, in the case of making a box-shaped product, a plurality of upper molds having a holding groove in the longitudinal direction and divided in the longitudinal direction are attached to the mold holder device. The molds are not clamped evenly, and several divided upper molds are lowered by about 1 to 2 mm until the upper surface of the upper mold holding groove hits a stopper provided on the mold holder device clamp. It was dangerous because workability was poor.
In addition, although there is a risk of dropping, many upper molds that do not have a holding groove in the longitudinal direction are used, and these upper molds could not be mounted on the same mold holder device. For a machine having a mold holder device for an upper mold having a holding groove in the direction, an upper mold having a holding groove in the longitudinal direction, and a mold holder device for an upper mold having no holding groove in the longitudinal direction. It is necessary to prepare dedicated dies for the same purpose, such as preparing upper dies that do not have a holding groove in the longitudinal direction. For users who use multiple press brakes, the management of the mold is complicated due to incompatibility, and it is also a double investment in the upper mold.

Problems to be solved by the invention

  The upper mold having the holding groove in the longitudinal direction according to the above-described prior art is prevented from being dropped and attached (both the upper mold divided in the longitudinal direction and the upper mold that is not divided) and has no holding groove in the longitudinal direction. The purpose is to make it possible to mount a mold, to improve the safety of the work, and to improve the function of the mold holder device.

Object of the invention

  In order to solve the problems of the prior art as described above, the upper mold having the holding groove in the longitudinal direction is mounted without dropping (the upper mold divided in the longitudinal direction is not, nor is the upper mold And a die holder device for a press brake capable of mounting an upper die having no holding groove in the longitudinal direction.

Means for solving the problem

  In order to achieve the above object, the present invention has the following technical means. Holds a mold holding member that has a mold holding surface that can move back and forth when viewed from the front, in contact with the top surface of the upper mold of the upper mold having a holding groove in the longitudinal direction. A torsion pin that has a mold clamping surface that conveys the pressure to the mold clamping surface and holds and rotates a pin that is provided in the holder body during clamping and is stored by a projection that is stored by a spring or the like And a die holder device in which the clamp body having a pin or the like attached to the hole portion of the holder main body and the protrusions stored by the spring or the like are provided in the holder main body as described above. .

Action

When inserting the upper mold having the holding groove in the longitudinal direction into the mold holder apparatus having the clamp, turn the wrench lever counterclockwise so that the upper surface of the mold holding groove faces the mold holding member. Place it on the mold holding surface from the side or insert the mold from below between the mold holding member and the holder body, and place the upper surface of the mold holding groove on the mold holding surface of the mold holding member Put it on. In this state, when the wrench lever is turned clockwise and the tightening bolt is tightened, the pin attached to the torsion pin provided at the upper part of the tightening hits the projection stored by the spring provided in the holder body, and the torsion The pin rotates. Pins are provided at both ends of the torsion pin, and the other end of the pin is engaged with a hole provided in the holder body, so that the mold is tightened in the upwardly raised state, The mold is clamped and held with no gap between the clamping surface of the clamp and the clamping surface of the mold, and the gap between the bottom surface of the holder body and the load surface of the mold before the clamping. Will not fall.
An upper die having no holding groove in the longitudinal direction can be similarly inserted into the die holder device from the side or the lower side. When the die is clamped, the die holding member is placed in the groove provided in the clamp body. The upper mold is mounted after moving.

  In order to facilitate understanding, the overall configuration will be described using the reference numerals used in the accompanying drawings.

  Referring to the drawings, the press brake mold holder device according to the present embodiment is generally indicated by numeral 1 and holds the upper mold 3 in a press brake for forming and processing a sheet metal material. It is mounted in a suspended state on a long horizontal support member 5 (also referred to as an upper table) at the upper front of the press brake by a known method. As will be understood by the progress of the description, in FIGS. 1, 2, 3, 4, and 6, the upper mold 3 is strictly defined by the mold holder device 1. It is shown as being in a position to be held but not yet finally held.

1 and 2, the mold holder device 1 is fixed to a rectangular plate 11 by a plurality of bolts 7 and spring pins 9, and the rectangular plate 11 is supported by a bolt 13 to support a press brake. It is attached to the member 5. As a well-known technique, the wedge 15 is fixed to the plate 11 with a bolt 17 through a washer 19 in a state where the wedge 15 is in contact with the lower surface of the support member 5 of the press brake at the upper part of the mold holder device 1. Incidentally, as shown in FIG. 3, the portion where the washer 19 is located at the opening of the hole of the plate 11 through which the bolt 17 passes is formed so that the plate 11 can move up and down by the horizontal movement of the wedge 15. Although not shown in the figure, as is well known, a support member generally called a table is provided directly below the support member 5 of the press brake, and the upper die 3 is cooperated with the support member 5 to form a sheet metal material thereon. A working lower mold is mounted. Thus, the sheet metal material to be molded is placed on the lower mold, and in order to mold it, the support member 5 that supports the upper mold 3 and the lower support member that supports the lower mold One is driven perpendicular to the other. In FIG. 1, only one mold holder device 1 and one upper mold 3 are shown. However, in order to form a wide sheet metal material, a plurality of divided upper molds are used. For this purpose, a plurality of mold holder devices 1 are used.
As is well known, the upper die 3 has a shank portion 3s for mounting on the upper portion, and a shoulder-like horizontal load is applied to the base of the shank portion 3s so as to receive a load during the molding process of the sheet metal material. A surface 3f is formed. In addition, as is well known, the upper mold 3 is generally provided with a holding groove 3g for preventing the fall having a rectangular cross section in the longitudinal direction as a safety measure for falling. However, as described later, the mold holder device 1 of the present invention can hold the upper mold 3 regardless of whether or not the upper mold 3 has the holding groove 3g.

  In particular, as clearly shown in FIGS. 1, 2, and 3, the mold holder device 1 has a holder body 21, which is long in the left-right direction of the press brake and short in the vertical direction and thin in the front-back direction. It is a rectangular parallelepiped member. However, in this embodiment, as seen in FIG. 1, the holder body 21 can be adjusted in height by inclining the upper surface and contacting the wedge 15, loosening the bolt 17 and moving the wedge 15 horizontally. It is configured as follows. The holder main body 21 is formed with a long rectangular parallelepiped mold holding portion 23 on the lower surface, which has vertical mold holding surfaces 23f and 23r for receiving the upper mold 3 at the front and rear. The upper mold 3 is held by the front mold holding surface 23f of the mold holding section 23 of the holder main body 21 in the drawing, but depending on the size and shape of the sheet metal material to be processed, It is held by one of the mold holding surfaces 23f and 23r. However, since it is convenient to hold the upper mold 3 at the front part of the holder main body 21, in this embodiment, the mold holder 21 is mainly held at the front mold holding surface 23f side. Is configured to do.

  In particular, as clearly shown in FIGS. 1, 2, and 3, before and after the upper die 3 is held by the die holding portion 23 of the holder body 21, that is, FIGS. 2 and 3. In the figure, rectangular plate-shaped clamps 25 and 27 are provided horizontally on both sides of the mold holding part 23 in parallel with the mold holding part 23. The clamps 25 and 27 have tightening portions 25h and 27h at their lower ends, respectively, and are held in a horizontal state rotatably by cylindrical torsion pins 29 and 31, respectively. 27h is configured to press and hold the upper mold 3 against the mold holding surfaces 23f and 23r of the mold holding portion 23, respectively. The torsion pins 29 and 31 pass through the clasps 25 and 27 in a freely rotatable manner, and both ends slightly protrude from the clasps 25 and 27 and are stopped therein by a retaining ring 33. The clamps 25 and 27 are arranged symmetrically with each other in order to press and hold the upper mold 3 against the mold holding part 23, and the clamping method is different. And functions in the same way. Therefore, in the following, only the clasp 25 will be mainly described, and some members of the same nature or the same function common to both the clasps 25 and 27, such as the retaining ring 33, may be The same symbols or numbers shall be used.

  As shown in FIG. 1 and FIG. 3, in order to hold the upper die 3 against the die holding surface 23 f of the die holding portion 23 of the holder main body 21 by the clamp 25, A screw hole 21t is formed horizontally above the portion 23, and a fastening bolt 35 is screwed into the screw hole 21t. The tightening bolt 35 has a washer 37, passes through a hole 25b formed in the clamp 25 from the outside of the clamp 25, that is, from the left side in FIG. 3, and is screwed into the screw hole 21t. The clamp 25 is configured to press and hold the upper mold 3 against the mold holding surface 23 f of the mold holding portion 23 of the holder body 21. As will be described later, the clamp 25 needs to move slightly up and down. For this reason, the hole 25b of the clamp 25 is provided with a size that allows the clamp 25 to move up and down. In the embodiment, a wrench bar 39 is detachably provided to turn the tightening bolt 35. The wrench bar 39 is provided with a plunger 41 to prevent the tightening bolt 35 from falling off. Incidentally, it is desirable for the clamp 25 to hold the upper mold 3 by one touch. For this purpose, the wrench bar 39 hangs down as shown in FIG. 1 and FIG. As indicated by the imaginary line in the figure, it is appropriate that the clamp 25 holds and holds the upper mold 3 when it is rotated about 225 degrees clockwise. Incidentally, as described later, the method of tightening the clasp 27 is different from the clasp 25 in terms of the configuration, but is conceptually similar.

As shown in FIGS. 1, 4 and 5, the torsion pins 29 and 31 holding the clamps 25 and 27 have pins 43 fixed to the ends thereof at right angles in the radial direction by set screws 45. The free end of the pin 43 is movably disposed in a hole 21ba provided horizontally in the upper part of the holder body 21. The pins 43 are located at both ends of the torsion pins 29 and 31, but the two pins 43 are installed at the same angle in the radial direction from the torsion pins 29 or 31. Further, the pin 43 and the torsion pins 29 and 31 lie almost horizontally in the hole 21ba of the holder main body 21 as shown in FIG. 4 when the clamps 25 and 27 do not hold the upper mold 3. Installed. Further, as will be described later, when the torsion pin 29 or 31 rotates and rises with the clamp 25 or 27, the pin 43 slides horizontally in the hole 21ba and tilts in the hole 21ba as shown in FIG. Configured to do. With the above configuration, the torsion pins 29 and 31 are engaged with the hole 21ba of the holder main body 21 through the pin 43 so as to freely move, and for the purpose to be described later, the torsion pins 29 and 31 move up and down while maintaining the level while rotating. The clamps 25 and 27 can be moved up and down.
As shown in FIGS. 4 and 5, in the holder main body 21, there is a hole 21h immediately below the hole 21ba, and a spring 47 is inserted into the hole 21h so as to press the clamps 25 and 27 outward. Yes. As a result, the clamps 25 and 27 and the holder body 21 are normally stored so as to be opened, and the upper mold 3 can be easily attached and detached.

  As shown in FIG. 3, the pin 49 is fixed to the torsion pin 29 at the center thereof, that is, directly above the fastening bolt 35, so as to hang perpendicularly in the radial direction by the set screw 51. The push bar 53 is in contact with the disk, and is stored in the clockwise direction in FIG. The pins 49 are fixed by set screws 51 so that the pins 43 at both ends of the torsion pin 29 hang down at a right angle in the radial direction when lying horizontally in the hole 21ba of the holder body 21. The push bar 53 is slidably disposed in a hole 21ba provided horizontally in the holder body 21 and its end is screwed into the end of the hole 21ba and is held by a spring receiver 59 fixed by a set screw 57. Is done. More specifically, the push rod 53 includes a main body portion 53b that is movably held by the spring receiver 59, a flange portion 53f that slides in the hole 21ba, and a push portion 53p having a small diameter that pushes the pin 49, and the other hole 21ba. The opening to the pin 49 is formed to have the same diameter as the pushing portion 53p, and the disc spring 55 stores the pushing portion 53p against the pin 49 via the flange portion 53f on the main body portion 53b. Composed. Thus, when the clamp 25 does not clamp and hold the upper mold 3, the torsion pin 29 is pushed by the disc spring 55 with the pusher bar 53 in such a state that the pins 43 at both ends lie horizontally in the hole 21 ba of the holder body 21. It is held elastically through. With the above configuration, if the tightening bolt 35 is rotated by the wrench bar 39 to hold the upper mold 3, the clamp 25 moves rearward, that is, to the right side in FIG. 29 is rotated in the clockwise direction in FIG. 3 because the pin 49 is in contact with the push bar 53 and is pushed up together with the clamp 25 by the pins 43 at both ends thereof. (See Fig. 8)

  In particular, as can be seen in FIGS. 1, 3 and 6, the clamps 25 and 27 are both longitudinally extending along the entire length of the clamps 25h and 27h at the lower end thereof. 25 g and 27 g are formed, and a mold holding member 61 is provided in the grooves 25 g and 27 g. The mold holding member 61 is a member having substantially the same length as the clamps 25 and 27, has a horizontal mold holding surface 61h and an inclined surface 61s, and a plurality of grooves 25g and 27g in the clamps 25 and 27 are provided. The screw 63 is held so as to be horizontally movable, and is stored by a spring 64 so as to protrude from the clamps 25 and 27 in the direction of the upper mold 3. That is, the mold holding member 61 is provided in the grooves 25g and 27g formed in the tightening portions 25h and 27h of the clamps 25 and 27 so as to be able to appear and retract. The mold holding member 61 holds the upper mold 3 by the holding groove 3g when the upper mold 3 has the holding groove 3g. The mold 3 is temporarily held before the clamp 25 or 27 is finally clamped and held. For this purpose, as shown in FIGS. 2 and 3, the mold holding member 61 has a mold 3 having a holding groove 3g between the clamp 25 or 27 and the mold holding part 23 of the holder body 21. When in the position to be clamped and held, it is located in the holding groove 3g of the upper mold 3, and the mold holding surface 61h is configured to hold the upper mold 3 by the upper surface of the holding groove 3g. Note that the mold holding surface 61 h of the mold holding member 61 abuts on the upper surface of the holding groove 3 g of the upper mold 3 to hold the upper mold 3, and the mold holding member 61 is inclined. The surface 61s functions as a cam. For example, when the upper mold 3 comes into contact with the upper mold 3, the mold holding member 61 is immersed in the clamp 25 or 27 against the spring 64. With the above configuration, if the tightening bolt 35 is rotated by the wrench bar 39 to hold the upper mold 3, the clamp 25 moves to the right side in FIG. 3, while the torsion pin 29 in FIG. By the clockwise rotation, it is pushed up by the pins 43 at both ends thereof. As a result of the clamp 25 being pushed up in this manner, the upper mold 3 has its load surface 3f on the lower surface of the mold holding portion 23 of the holder main body 21 by the mold holding member 61 engaged with the holding groove 3g. Can be lifted to full contact. Incidentally, when there is no holding groove 3g in the upper die 3, it can be inserted from below between the clamp 25 and the die holding surface 23f as shown by a two-dot chain line in FIG. When tightened with 39, the mold holding member 61 is immersed in the clamp 25 or 27 against the spring 64 as shown in FIG. As will be described later, the clamps 25 and 27 have different points such as a tightening method, but the mold holding member 61 is similarly configured.

  1 and 6, in order to mount the upper mold 3 behind the mold holding portion 23 of the holder body 21, that is, on the right side in FIG. A tightening bolt 65 for tightening 27 is provided. In the present embodiment, as shown in FIG. 1, the fastening bolts 65 are installed at the same height at two locations on the left and right sides of the holder main body 21, and penetrate the holes formed in the holder main body 21 horizontally. It passes through a washer 67 and is screwed into a nut 71 locked to a clamp 27 by a spring pin 69. Thus, when the tightening bolt 65 is turned, the clasp 27 is pulled through the washer 67, and the upper mold 3 is pressed against the mold holding portion 23 of the holder body 21 to be tightened and held.

  Referring to FIG. 7, as in the case of the torsion pin 29 and the clamp 25, the pin 73 is fixed to the torsion pin 31 by a set screw 75 in order to rotate the torsion pin 31 and lift the clamp 27. Yes. A push rod 77 abuts on the pin 73, and the push rod 77 is stored by a disc spring 79. In addition, the spring receiver 81 receives a disc spring 79 and holds the end of the push rod 77. It is fixed by. Thus, if the fastening bolt 65 is rotated to hold the upper mold 3 (see FIG. 6), the clamp 27 moves forward, that is, to the left in FIG. The torsion pins 31 are rotated counterclockwise in FIG. 7 by the pins 73 and are pushed up together with the clamps 27 by the pins 43 at both ends thereof, and the upper mold 3 is clamped and held.

The invention's effect

As will be understood from the above description of the embodiments, according to the present invention, as described in the claims, a mold holding member and a mold having a mold holding surface that can be moved forward and backward as viewed from the front. A torsion pin that has a mold clamping surface and rotates by a projection provided in the holder main body and stored by a spring, etc. when the mold is clamped, and the other end engaged with a hole provided in the holder main body The upper die having the holding groove in the longitudinal direction can be clamped and attached to the holder body with the gap between the load surface of the upper die and the lower surface of the holder body eliminated by the clamp having the pin to be used. Therefore, it is possible to prevent the upper mold having the holding groove in the longitudinal direction (including the upper mold divided in the longitudinal direction) from dropping.
Further, by moving the mold holding member in the front-rear direction, an upper mold having no holding groove in the longitudinal direction can be mounted with the same clamp.

  It is a front view which shows the metal mold | die holder of this invention with which the press brake was mounted | worn.   It is a side view of the metal mold | die holder of this invention.   It is sectional drawing in the III-III line in FIG. 1, and is abbreviate | omitting partially.   It is sectional drawing in the IV-IV line of FIG. 1, and shows only the principal part.   FIG. 4 is a cross-sectional view in the same plane (IV-IV line in FIG. 1) as FIG. 4, showing only the main part.   It is sectional drawing in the VI-VI line of FIG. 1, and shows only the principal part.   It is sectional drawing in the VII-VII line of FIG. 1, and shows only the principal part.   FIG. 3 is a sectional view in the same plane as FIG. 3 (III-III line in FIG. 1), showing only the main part.   FIG. 3 is a sectional view in the same plane as FIG. 3 (III-III line in FIG. 1), showing only the main part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold holder apparatus 3 Upper mold 3g Holding groove 3f Load surface 5 Support member 7 Bolt 9 Spring pin 11 Plate 13 Bolt 15 Wedge 17 Bolt 19 Washer 21 Holder main body 21t Screw hole 21ba Hole 21h Hole 23 Mold holding part 23f Metal Die holding surface 23r Die holding surface 25 Clamping 25h Clamping surface 25b Hole 25g Groove 27 Clamp 27h Clamping surface 27g Groove 29 Torsion pin 31 Torsion pin 33 Retaining ring 35 Tightening bolt 37 Washer 39 Wrench bar 41 Plunger 43 Pin 45 Set screw 47 Spring 49 Pin 51 Set screw 53 Push rod 53b Body portion 53f Flange portion 53p Push portion 55 Belleville spring 57 Set screw 59 Spring receiver 61 Die holding member 61h Die holding surface 61s Inclined surface 63 Screw 64 Spring 65 Tightening bolt 67 Washer 69 Spring pin 71 Tsu door 73 pin 75 set screw 77 push rod 79 disc spring 81 spring receiving 83 set screw

Claims (2)

  A mold holding device that can be inserted and retracted in a mold holder device that detachably mounts and supports a mold on a horizontal long support member (also called an upper table) at the front upper part of the press brake. A torsion that has a mold holding member and a mold clamping surface, holds a pin that is stored by a projection that is stored by a spring, etc., in the holder body, and rotates when the upper mold is tightened By lifting the upper mold having a holding groove in the longitudinal direction when tightening by a clamp having a pin and a pin attached to the other end and engaging with a hole of the holder body, the mold of the holder body is lifted upward. A metal mold characterized by having a holder body having the clamp and the protrusion, which eliminates a gap between the lower surface of the mold holding portion and the load surface of the upper mold, and allows the upper mold to be fastened to the holder body. Mold holder Location.   4. A mold having a clamp that allows the mold holder apparatus described in claim 1 to be mounted by tightening an upper mold without a holding groove in the longitudinal direction when the mold holding member is immersed in the clamp. Holder device.

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