JP2010260071A - Folding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding device capable of accurately folding a workpiece by uniformly applying pressure to the workpiece, and capable of obtaining satisfactory finishing when it is made into a product. <P>SOLUTION: This folding device 1 includes: a frame body 2 which is formed with a pair of first frames 21 arranged in parallel and a second frame 22 to which the base ends of the first frames 21 are connected; a punch P which is arranged as a fixed side die whose both ends are fixed between the top sides of the pair of the first frames; a slide table 3 which is arranged at the base end side of the first frames 21 and arranged so that both the ends are slidable between the first frames 21; a die D which functions as a moving side die by being provided to the slide table 3; and a driving mechanism 4 for sliding and pressing the slide table 3. Since the fixed side die is mounted on the top sides of the pair of the first frames 21 which are arranged in parallel, the workpiece is not interfered with the frame body 2 when the workpiece is folded. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bending apparatus capable of bending a plate-like body or a rod-like body into a desired shape.

  There exists what is called a press brake as a bending processing apparatus. This press brake folds a workpiece by sandwiching the workpiece with a punch provided at an upper portion and a die provided at a lower portion. As such a press brake, what was described in patent document 1 is known, for example.

  In the press brake, the punch (punch) supported by the frame descends from above and sandwiches the workpiece located on the die. The work cannot hit the frame and bend. Alternatively, it is difficult to remove the workpiece from the frame after bending the workpiece.

  For example, Patent Document 2 discloses a conventional bending apparatus that improves this point. The folding machine described in Patent Document 2 is a U-shaped frame, a cylinder provided on one side of two opposite sides of the frame, and attached to the cylinder, and moves to the opposite side. And it consists of a punch (or die) having a predetermined shape and a die (or punch) provided on the other side of the two sides.

JP-A-9-141337 Japanese Utility Model Publication No. 61-36320

  However, in the folding machine described in Patent Document 2, since the frame has a U shape, when the workpiece is bent by applying pressure, the leading ends of the frame open in a direction that spreads outward. In addition, there is a possibility that the pressure that is sandwiched between the punch and the die with respect to the work is biased between the base end side and the front end side of the frame. If there is a bias in the sandwiching pressure, one part of the work is bent deeply and the other part is bent shallowly, so that the work cannot be bent uniformly. Therefore, there is a possibility that the workpiece cannot be bent into a desired shape.

  Therefore, the folding machine described in Patent Document 2 allows the workpiece to be bent without hitting the frame, and allows the workpiece to be bent into a polygonal shape. However, there is a difference in the bending depth in the width direction of the workpiece. As a result, satisfaction cannot be obtained with respect to the finished product when the folded workpiece is made into a product.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a bending apparatus that is capable of accurately bending a work by applying pressure evenly to the workpiece, so that satisfaction can be obtained in the finished product.

  The bending apparatus of the present invention includes a frame main body formed by a pair of first frames arranged in parallel and a second frame connecting the base ends of the first frames, and distal ends of the pair of first frames. The movable side mold provided on the base end side of the first frame and slidably provided at both ends between the pair of first frames is slid and added to the fixed side mold disposed between And a drive mechanism for pressing.

  According to the bending apparatus of the present invention, the frame main body is formed of a pair of first frames arranged in parallel and a second frame connecting the base ends of the first frames, and the distal ends of the pair of first frames. Since the drive mechanism provided on the base end side of the first frame slides and presses the moving side mold to the fixed side mold where both ends are arranged between the sides, the workpiece is moved to the fixed side mold side. Even if it is bent, the bent work does not interfere with the frame body or the drive mechanism. Therefore, the workpiece can be bent into a desired shape. Further, since the fixed side mold or the movable side mold is arranged between the pair of first frames arranged in parallel, both ends of the fixed side mold and the movable side mold are firmly fixed by the first frame. Is retained. Therefore, even if the moving side mold is slid in the direction of the fixed side mold by the driving mechanism and pressed with the work sandwiched, the frame body does not deform. As a result, pressure can be applied evenly to the workpiece, so that it can be bent accurately.

  Between the pair of first frames, there is provided a slide table that slides along the first frame by the drive mechanism, and fixed side mounting on which the fixed molds of the pair of first frames are mounted. It is desirable that the portion and the moving side mounting portion to which the moving side mold of the slide table is mounted are formed in the same shape. When the moving side mounting part to which the moving side mold provided on the slide table is mounted and the fixed side mounting part to which the fixed side mold provided to the pair of first frames are mounted have the same shape, it is fixed. It is necessary to prepare a dedicated punch and a dedicated die, such as a fixing punch and a moving punch, by attaching the side mold to the slide table and moving it or vice versa. Absent. Further, by providing a slide table for movement, the pressure of the drive mechanism can be uniformly transmitted to the moving side mold.

  It is desirable that at least one inner surface of the pair of first frames is an abutment surface formed in a plane perpendicular to the fixed mold. When the workpiece is in the shape of a long plate, the plate surface of the workpiece is applied to the fixed mold, and the inner surface of the first frame formed in a plane perpendicular to the fixed mold is used as an abutment surface. By performing the bending operation while applying the side end surface of the work, the work can be bent perpendicularly to the side end surface. Therefore, an accurate bending operation can be performed.

  In the drive mechanism, it is preferable that a pressing portion that pressurizes the moving-side mold and slides toward the fixed-side mold is provided at least on the abutting surface side from the center position of the moving-side mold. When the work is brought into contact with the abutting surface and bent, the center position of the work is biased toward the abutting surface. Since the pressing portion of the drive mechanism is provided at least on the abutting surface side from the center position of the moving side mold, pressure is applied evenly in the width direction of the workpiece, so that the workpiece can be bent evenly. it can.

  According to the present invention, even when the moving-side mold slides in the direction of the fixed-side mold by the driving mechanism and presses in a state of sandwiching the workpiece, the fixed-side mold is interposed between the pair of first frames arranged in parallel. Since both ends of the mold and the moving-side mold are firmly held by the first frame, the frame body does not deform. Therefore, according to the present invention, since the pressure can be applied evenly to the workpiece, it can be bent accurately, so that the finished product can be satisfied.

It is a perspective view which shows the state by which the bending processing apparatus which concerns on embodiment of this invention has been arrange | positioned on the table. It is a partial top view of the 1st frame of the state which removed the stationary side metal mold | die and the movement side metal mold | die of the bending processing apparatus shown in FIG. (A) is a perspective view showing a die, (B) is a perspective view showing a punch. It is a figure which shows the bending method of the bending processing apparatus shown in FIG. 1, (A) is a figure which shows convex folding, (B) is a figure which shows concave folding. It is a figure which shows an example of a bending process. (A)-(K) is a figure for demonstrating the bending procedure. It is a figure for demonstrating the bending procedure performed from FIG.

A bending apparatus according to an embodiment of the present invention will be described with reference to the drawings.
In the present specification, the side on which a drive mechanism (to be described later) is disposed is the base end of the bending apparatus, and the opposite side is the front end.

  As shown in FIG. 1 and FIG. 2, the bending apparatus 1 is an apparatus that is placed on a mounting table T and is configured to sequentially bend a long workpiece and process it into a desired shape. The bending apparatus 1 includes a frame body 2, a slide table 3, and a drive mechanism 4.

  The frame body 2 includes a pair of first frames 21 that are formed of a steel plate and are arranged in parallel, and a second frame 22 that connects the base ends of the first frames 21.

The pair of first frames 21 is formed of an upper first frame 21a positioned on the upper side and a lower first frame 21b positioned on the lower side. Both the upper first frame 21a and the lower first frame 21b are each provided with a long hole 21c in the center along the longitudinal direction. As a fixing attachment portion having a narrower width than the moving portion of the slide table 3 to which the moving side mold is attached in order to dispose a die D or punch P to be a fixed side mold, which will be described later, at the distal end side of the long hole 21c. A functioning narrow recess 21d is formed.
The upper first frame 21a is formed so that the proximal end side is wider than the distal end side. The lower first frame 21b has a rectangular shape formed with a uniform width from the distal end side to the proximal end side.

The second frame 22 includes a sprocket support plate 22a arranged in the vertical direction that connects the base ends of the upper first frame 21a and the lower first frame 21b, and two side plates 22b.
The sprocket support plate 22a has an upper end and a lower end welded between a pair of first frames 21, and a sprocket of the drive mechanism 4 described later is disposed. The two side plates 22 b are welded at the upper end and the lower end between the pair of first frames 21, and are arranged in parallel along the longitudinal direction of the first frame 21.

  The slide table 3 has an upper end and a lower end provided in the long hole 21c of the pair of first frames 21 so as to be movable along the long hole 21c. The slide table 3 is provided with a groove 31 (see FIG. 2) that functions as a moving attachment for attaching either the die D or the punch P on the inner surface facing the fixed mold. The groove portion 31 has a concave shape with a rectangular cross section, and has the same shape as the narrow concave portion 21d that functions as a fixing attachment portion.

The drive mechanism 4 includes an operation handle 41, a rotary shaft 42, a bearing portion 43, a drive sprocket 44, a driven sprocket 45, an endless belt 46, and a pressing portion 47.
The operation handle 41 is formed in a circular shape having a gripping portion 41 a for applying rotational driving to the rotary shaft 42. The rotation shaft 42 is a drive shaft that is fixed to the center of the operation handle 41 and transmits the rotation drive of the operation handle 41 to the drive sprocket 44. The bearing portion 43 is a bearing that is fixed to the lower first frame 21 and rotatably supports the rotary shaft 42. The drive sprocket 44 is provided on the sprocket support plate 22a and is rotated by a rotary shaft 42 inserted through the sprocket support plate 22a. The driven sprocket 45 is provided on the sprocket support plate 22 a and is disposed above the drive sprocket 44. The endless belt 46 is wound around the drive sprocket 44 and the driven sprocket 45, and transmits the rotational drive from the drive sprocket 44 to the driven sprocket 45.
The pressing portion 47 is a pressure shaft that is disposed coaxially with the drive sprocket 44 and the driven sprocket 45. The rotation of the driving sprocket 44 and the driven sprocket 45 causes the pressing portion 47 to expand and contract to press the slide table 3. Two pressing portions 47 are provided, one is arranged on the lower first frame 21 b side from the center position of the slide table 3, and the other is arranged slightly above the center position of the slide table 3.

Here, the die D and the punch P to be mounted on the bending apparatus 1 as the fixed side mold will be described with reference to FIG.
The punch P is formed by a convex blade portion P1 formed in a triangular cross section and a base portion P2 formed in a rectangular cross section. The die D is formed of a concave blade portion D1 having a triangular cross section and a base portion D2 having a rectangular cross section. The base P2 of the punch P and the base D2 of the die D are formed in the same shape, and are formed so as to be attachable to both the groove 31 and the narrow recess 21d of the slide table 3.
Further, screw holes P3 and D3 for fixing to the upper first frame 21a and the slide table 3 with the fixing metal 5 and the screw 6 are formed on the upper end surface which is one end surface of the base P2 of the punch P and the base D2 of the die D. Is provided.

The operation and method of use of the bending apparatus according to the embodiment of the present invention configured as described above will be described with reference to the drawings.
In the present embodiment, an example will be described in which a metal plate formed of a long thin plate is used as a work W and the “book” shown in FIG.
As shown in FIG. 5 (A), a punch is mounted as a fixed mold, and when a die is mounted as a moving mold, a convex fold is formed, and the opposite is a concave fold as shown in FIG. 5 (B). Called.

  First, the base P2 of the punch P is fitted into each narrow recess 21d of the first frame 21, and the end of the fixing bracket 5 is screwed with the screw 6 with the end hooked on the tip of the first frame 21. The punch P is fixed to the first frame 21. Further, the die D is fitted into the groove portion 31 of the slide table 3, and the die D is fixed to the slide table 3 by screwing with the screw 6 in a state where the end of the fixing bracket 5 is hooked on the base portion of the slide table 3. . Then, the work W whose bending position has been scribed with a laser or the like is placed in accordance with the blade position. At this time, since the inner side surface of the lower mold first frame 21b is an abutting surface S formed in a plane perpendicular to the die D and the punch P, the side end surface along the longitudinal direction of the workpiece W is applied. The blade surfaces of the die D and the punch P can be applied perpendicularly to the side end surface. Therefore, since the workpiece can be bent perpendicularly to the side end face, an accurate bending operation can be performed.

  When the operation handle 41 is rotated, the rotating shaft 42 rotates and the drive sprocket 44 is driven. As the drive sprocket 44 rotates, a pressing portion 47 coaxial with the drive sprocket 54 extends. Further, the driven sprocket 45 is rotated by the endless belt 46 and the pressing portion 47 coaxial with the driven sprocket 45 extends. When the workpiece W is brought into contact with the abutment surface S, the center of the workpiece W is located below the center of the fixed side mold or the movable side mold. A plurality of pressing portions 47 that pressurize the slide table 3 are arranged, one of which is provided on the abutting surface S side from the center position of the moving-side mold and pressurizes the rear end surface of the slide table 3. It can be added evenly in the width direction. Therefore, the work W can be bent evenly.

  As shown in FIG. 6 (A) to FIG. 6 (C), the corner portions C2 and C3 are first convexly bent in order from the corner portion C1. When the corner portion C3 is folded, the fixed mold and the movable mold are switched. The base D2 of the die D and the base P2 of the punch P have the same shape, and the narrow recess 21d of the first frame 21 and the groove 31 of the slide table 3 have the same shape. The completed punch P is mounted on the groove 31 as it is, and the die D that is the moving side mold is mounted on the narrow recess 21 d of the first frame 21 as it is. Therefore, it is not necessary to prepare a dedicated punch and a dedicated die such as a fixing punch and a moving punch.

  The fixed side mold and the moving side mold are switched, and the corner portion C4 and the corner portion C5 are recessed (see FIG. 6D and FIG. 6E). Then, the fixed side mold and the moving side mold are switched, and the corner portion C6 is convexly folded (see FIG. 6F). In this corner portion C6, the work W bends to the back side opposite to the blade surface of the punch P that is the fixed side mold, but the fixed side mold is disposed on the front end side of the first frame 21, and the first frame Since the drive mechanism 4 is arranged on the base end side of the workpiece 21, even if it is bent to the fixed mold side by bending the work W by sliding and pressing the moving mold, the bent work W does not interfere with the frame body 2 or the drive mechanism 4. Therefore, the bending apparatus 1 can be bent as in the corner portion C6.

  Next, the fixed side mold and the moving side mold are switched to fold the corner portion C7 (see FIG. 6G). Here, the corner portion C8 is first bent and the corner portion C9 is folded first (see FIG. 6H). This is because if the corner portion C8 is bent before the corner portion C9, the corner portion C9 becomes difficult to bend.

  Once the corner portion C9 is recessed, the corner portion C10 is then folded (see FIG. 6I). Next, the corner portion C12 is first folded (see FIG. 6J), and then the corner portion C11 is folded (see FIG. 6K).

  Next, as shown in FIG. 7A to FIG. 7C, the corner portion C13 is folded, the corner portion C14 is folded, and the corner portion C15 is folded.

  Then, the left half of the “book” is also performed in the same way as before. Then, the corner portion C8 is bent and folded, and the corner portion on the opposite side of the corner portion C8 is also folded (see FIGS. 7D and 7E).

  In this way, the bending apparatus 1 is a complex that cannot be bent even by a press brake device by bending the workpiece W while replacing the punch P and the die D as a fixed side mold or a moving side mold. Even simple shapes can be bent easily. Further, the bending apparatus 1 is configured such that even if the moving-side mold is slid in the direction of the fixed-side mold by the drive mechanism 4 and pressed while sandwiching the workpiece, the pair of first frames 21 arranged in parallel is supported. Since both ends of the fixed side mold and the movable side mold are firmly held by the first frame 21 between them, the frame body 2 is not deformed. Therefore, since the bending apparatus 1 can apply the pressure evenly to the workpiece W, the bending apparatus 1 can bend accurately, so that the finished product can be satisfied.

In the bending apparatus 1 according to the present embodiment, the slide table 3 slides in the horizontal direction and pressurizes the moving mold on the fixed mold, but the fixed mold is moved upward. You may arrange | position so that it slides by making a side metal mold | die down and raising / lowering a movement side metal mold | die.
The fixed mold is directly attached to the first frame 21, but a fixed table may be provided, and a die D or punch P that functions as the fixed mold may be mounted on the fixed table.
Further, in this embodiment, the triangular convex punch and the triangular concave die are used as the fixed side mold and the moving side mold, but the round bar shaped mold is used as the fixed side mold and the moving side mold. By using it as a side mold, the corner of the workpiece can be bent into an arc shape.
Further, in the present embodiment, the operation handle 41 is manually rotated, but may be automatically rotated by a motor or the like, or the slide table 3 may be pressed by hydraulic pressure or the like.

  The present invention is suitable for a bending apparatus that bends a plate-like body or a rod-like body into a desired shape.

DESCRIPTION OF SYMBOLS 1 Bending apparatus 2 Frame main body 21 1st frame 21a Upper 1st frame 21b Lower 1st frame 21c Long hole 21d Narrow recessed part S Butting surface 22 2nd frame 22a Sprocket support plate 22b Side plate 3 Slide table 31 Groove part 4 Drive Mechanism 41 Operation handle 41a Gripping part 42 Rotating shaft 43 Bearing part 44 Drive sprocket 45 Driven sprocket 46 Endless belt 47 Pressing part 5 Fixing bracket 6 Screw P Punch P1 Convex blade part P2 Base part P3 Screw hole D Die D1 Concave blade part D2 Base part D3 Screw hole T Mounting table

Claims (4)

A frame body formed by a pair of first frames arranged in parallel and a second frame connecting the base ends of the first frames;
The fixed side mold disposed between the distal ends of the pair of first frames is provided on the proximal end side of the first frame, and both ends are slidably provided between the pair of first frames. A bending apparatus comprising a drive mechanism that slides and pressurizes a side mold. Between the pair of first frames, there is provided a slide table that slides along the first frame by the drive mechanism,
The fixed-side mounting part to which the fixed-side mold of the pair of first frames is mounted and the moving-side mounting part to which the moving-side mold of the slide table is mounted are formed in the same shape. The bending apparatus according to 1.   3. The bending apparatus according to claim 1, wherein an inner side surface of at least one of the pair of first frames is an abutting surface formed on a plane perpendicular to the fixed mold.   The said drive mechanism is provided with the press part which pressurizes the said movement side metal mold | die and slides to the said fixed side metal mold | die at the butting surface side at least from the center position of the said movement side metal mold | die. Bending machine.

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