JP5505824B2 - Bending machine - Google Patents

Description

The present invention relates to an apparatus for bending a linear material made of a metal rod or a metal plate.

For example, a chain tensioner 100 shown in FIG. 6 is provided in a vehicle such as an automobile. This type of chain tensioner 100 is configured by bending a rod-shaped steel material, that is, substantially the entire length in the longitudinal direction or a part thereof with a bending device.
In a conventional bending apparatus, for example, a material is pressed with an upper mold and a lower mold to produce a chain tensioner having a desired bending condition.

An apparatus for bending such a linear material is disclosed in Patent Document 1. This Patent Document 1 discloses an apparatus for bending an axis of a molding material bent into a predetermined cross-sectional shape in a multidimensional direction when manufacturing a sash, a molding, or the like. Specifically, as shown in FIG. 3 of Patent Document 1, at least a pair of left and right bending rolls that pass through the molding material fed from the holding device B are aligned, and any one of these bending rolls is fed in the molding material feeding direction. The molding material can be accurately bent by swinging to the right or left.
JP-A-60-158921

However, since the chain tensioner 100 shown in FIG. 6 also has different dimensions and curvatures depending on the vehicle, a mold suitable for the chain tensioner must be prepared so that the chain tensioner exhibits a desired degree of bending for each product. For this reason, if a small amount of this type of chain tensioner is manufactured, the mold cost increases.
Moreover, in the apparatus of patent document 1, the molding material is bent in order from the feed side. This can be shaped freely if it is a molding material such as an aluminum alloy, but if steel or a pre-quenched wire, that is, a pre-hardened material is used as a material, a springback will occur during bending, and the desired shape Found that could not be molded. In this case, a press that anticipates deformation due to springback or correction of the shape after bending is necessary, and the work becomes complicated.

Then, in view of the said subject, this invention aims at providing the bending apparatus which can bend a raw material, such as steel and a prehardened material, easily while being able to manufacture a small amount of various kinds of workpieces.

In order to achieve the above object, a bending apparatus according to the present invention includes a turntable, two rotary pins erected on the turntable, driving means for rotating the rotary table, and two rotary pins. And two slide pins for moving the two fixed pins together with the two rotating pins, and a linear material made of a metal rod or a metal plate between the two rotating pins. When the turntable is rotated by the driving means in the state of being inserted into the shaft, the rotation of the entire material by the two rotating pins is restricted by the fixed pin, and further, the stress by the rotating pin is applied to the portion sandwiched between the two rotating pins. The material is bent by adding .

  According to the present invention, a plurality of bendings having different curvatures can be realized by adjusting the rotation angle of the two rotation pins with respect to the material. Therefore, according to the present invention, it is possible to manufacture a small quantity and a wide variety of workpieces at low cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same or corresponding members are denoted by the same reference numerals.
In the present embodiment, the chain tensioner 100 shown in FIG. 6 is manufactured using a linear material such as a metal bar or a metal plate using two bending apparatuses, and specifically, the first bending apparatus. To form the bent portions 101, 102, 103 and the curved portion 104 of the chain tensioner 100, and the second bending device processes the material to form the round portion 105 at the tip of the chain tensioner 100. Form.
Hereinafter, the first bending apparatus and the second bending apparatus will be described.

[About the first bending apparatus]
FIG. 1 is a front view of a first bending apparatus 1 (hereinafter simply referred to as a bending apparatus 1) according to an embodiment of the present invention, and FIG. 2 is a plan view of the bending apparatus 1 of FIG.
The first bending apparatus 1 includes a slide unit 20 placed on a table 10, a drive unit 30 disposed on the slide unit 20, and two rotations disposed on the drive unit 30. A pin 40 and two fixing pins 50 are provided.

  The slide means 20 includes two first rails 21 fixed to the upper surface of the table, a first slide plate 22 that moves along the first rails 21, and the first slide plate 22 disposed on the first slide plate 22. Two second rails 23 extending in a direction different from the extending direction of the one rail 21, and a second slide plate 24 that moves along these second rails 23 are provided. Driving means 30 is fixed to the upper surface of the second slide plate.

  The drive means 30 is composed of, for example, a motor, and the rotation shaft 31 extends in the vertical direction along a virtual vertical line Z indicated by a one-dot chain line in FIG. A disk-shaped turntable 32 is attached to the rotation shaft 31 of the drive means 30. In the illustrated example, the turntable 32 has a circular outline in plan view, but is not limited to this shape.

Two rotation pins 40 are disposed so as to protrude from the upper surface of the turntable 32. The two rotation pins 40 are formed in a columnar shape, and are attached to the turntable 32 so that an intermediate position between the two rotation pins 40 is located on the virtual vertical line Z. Accordingly, the two rotation pins 40 rotate around the virtual vertical line Z around the virtual vertical line Z. The height H1 of these rotary pins 40 is set higher than the height H2 of the material W, as shown in FIG. A linear material W made of a metal plate is inserted between these two rotary pins 40.
Although not shown, the first bending apparatus 1 is provided with means for feeding a linear material W made of a metal plate between the two rotating pins 40.

  Further, in the present embodiment, two cylindrical fixing pins 50 are provided beside these two rotating pins 40. Specifically, two fixing pins 50 are provided at the same height position as the rotation pin 40 at the extension destination of the material W that has passed between the two rotation pins 40. These two fixing pins 50 are provided so as to protrude upward from the upper surface of the bracket 36 fixed to the case 35 of the driving means 30. The height H3 of these fixing pins 50 is set to be higher than the height H2 of the material W as shown in FIG. As shown in FIG. 2, the two fixing pins 50 are attached to the bracket 36 so that an imaginary line X connecting the fixing pins is orthogonal to the extending direction Y of the material.

  In this way, the material W is partially bent when the driving unit 30 rotates the turntable 32 in a state where a part of the material W is inserted between the two rotation pins 40. The driving of the driving means 30 is controlled by the control device 60. The control device 60 is realized by a computer, and this kind of computer performs drive control of the drive unit 30 by executing software installed in advance. A computer having a conventionally known configuration can be used, and stored in a storage device such as a storage device such as a RAM, a ROM, and a hard disk, an operation device such as a keyboard and a pointing device, and an instruction from the operation device. A central processing unit (CPU) for processing data and software, a display for displaying processing results, and the like are provided.

According to the first bending apparatus 1 configured as described above, first, as shown in FIG. 3A, the orientation of the rotary pin 40 so that the virtual lines X1 and X2 connecting the pins are parallel to each other. In a state in which is adjusted, the material W extending straightly is passed between the two rotating pins 40 and the two fixing pins 50. Then, the driving device 30 is driven by the control device 60 to rotate the turntable 32. At this time, the entire material W tries to rotate due to the rotation of the two rotation pins 40, but the fixed pin 50 restricts the rotation of the entire material. Then, when the stress caused by the rotating pin 40 is applied to a portion sandwiched between the two rotating pins 40, the material W is bent at the portion as shown in FIG. 3B. At this time, the drive means 30 rotates the turntable 32 to a desired rotation angle, whereby the material W can be bent with a desired curvature.
In this case, if a material subjected to high-frequency heating is used as the material W, the labor of performing high-frequency heating after the work is completed can be saved.

  As described above, according to the first bending apparatus 1 according to the embodiment of the present invention, by adjusting the rotation angle of the two rotation pins 40 with respect to the material W, a plurality of bendings having different curvatures are performed. Can be realized. Therefore, according to the first bending apparatus 1 of the present embodiment, it is possible to manufacture a small quantity and a wide variety of workpieces at low cost.

  In the present embodiment, the slide means 20 is provided, and the rotation pin 40 and the fixed pin 50 can move in the extending direction of the first rail 21 and the second rail 23, so that illustration is omitted, but both ends of the material W are omitted. Since the position of the rotary pin 40 and the fixed pin 50 with respect to the material W can be adjusted when the is fixed to other jigs, it is suitable for manufacturing a wide variety of workpieces.

[About the second bending machine]
FIG. 4 is a perspective view of a second bending apparatus 2 (hereinafter simply referred to as a bending apparatus 2) according to an embodiment of the present invention.
The bending apparatus 2 includes a driving unit 70 and a clamping unit 80.

  The driving means 70 rotates the clamping means 80, and is composed of, for example, a motor. The rotation shaft 71 extends vertically along a virtual vertical line Z 'indicated by a one-dot chain line in FIG.

  The clamping means 80 sandwiches one end portion of the linear material W made of a metal plate, and includes a disc-shaped rotating table 81, a pin 82 protruding from the surface of the rotating table 81, and the rotating table 81. A guide portion 83 that protrudes from the surface and extends linearly toward the pin 82 and a movable portion 84 that slides on the guide portion 83 are provided.

  In the illustrated example, the rotary table 81 has a circular outline, but is not limited to this shape. The turntable 81 is connected to the rotation shaft 71 of the drive means 70.

  The pin 82 is formed in a cylindrical shape, and is fixed on the turntable 81 so that the axial direction of the pin coincides with the virtual vertical line Z ′.

  Furthermore, the second bending apparatus 2 according to the present embodiment includes two rails 91 and a slide plate 92 that moves along these rails 91, and the driving means 70 is on the slide plate 92. It is arranged.

  According to the second bending apparatus 2 configured in this way, first, one end of the material W is clamped by the clamping means 80. Then, the driving device 70 is driven by the control device 60 to rotate the turntable 81. At this time, the pin 82 rotates around its axis, the imaginary vertical line Z ′, specifically, in the direction of winding the material W around the pin surface. Thereby, the front end side of the raw material W is pressed around the pin, and a round portion 101 as shown in FIG. 6 is formed. Next, the slide plate 92 is moved along the rail 91. Thereby, the raw material W can be moved a predetermined distance. In this case, as shown in FIG. 4, if the material cutting means 95 is provided on the material supply side, it is possible to easily cut the material W to a predetermined length by moving the slide plate 92 by a predetermined distance.

[About processing of chain tensioner 100]
First, the front end portion of the material is processed by the bending apparatus 2 described above, and the round portion 105 is formed at the front end portion of the material. Then, the slide plate 92 in the bending apparatus 2 is moved along the rail 91, and the material W is drawn from the sending source and cut to a desired length.
Next, the cut material is set in the bending apparatus 1 described above, and a desired intermediate portion in the longitudinal direction of a long and straight thin metal plate is processed, and a bent portion having a desired bending state is obtained. And form a curved part. For example, the bending portions 101, 102, 103 of the chain tensioner 100 shown in FIG. 6 have the driving means 30 move the rotating pin 40 to the left or right side in a plan view in FIG. 2 with respect to the material extending direction Y (FIG. 2). It is formed by rotating a desired angle.
Further, the gently curved portion 104 on the distal end side from the bent portion 101 is formed by rotating the rotating pin 40 at a small rotation angle at a plurality of locations from the distal end portion to the bent portion 101 and gently bending it at each bending point. it can.
In this way, the workpiece shown in FIG. 6, for example, the chain tensioner 100, can be manufactured through the bending process in the first bending apparatus 1 and the second bending apparatus.
In this case, even if steel or a pre-hardened material is used as the material, according to the bending apparatus of the present embodiment, a curve with a desired curvature is formed by simply rotating the rotary pin 40 by a predetermined angle in consideration of the spring back. be able to.

The present invention is not limited to the above-described embodiments, and includes various modifications of the design within the technical scope without departing from the gist of the invention described in the claims.
For example, the present invention may be configured without the sliding means. The material is not limited to a narrow plate-like material as in the illustrated example, and may be a rod having a circular cross section. In this case, as shown in FIG. 5, the two rotary pins 40, 40 and the fixed pins 50, 50 are formed by concentrating intermediate portions in the height direction so that the surface against which the material W hits forms a curved surface. Yes.

It is a front view of the 1st bending apparatus which concerns on embodiment of this invention. It is a top view of the bending apparatus of FIG. It is a figure for demonstrating operation | movement of the 1st bending apparatus of FIG. It is a perspective view of the 2nd bending apparatus which concerns on embodiment of this invention. It is a perspective view which shows the rotating pin and fixed pin which concern on other embodiment of this invention. It is a figure which shows the conventional chain tensioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Processing apparatus 10 Table 20 Slide means 21 1st rail 22 1st slide plate 23 2nd rail 24 2nd slide plate 30 Drive means 31 Rotating shaft 32 Rotating base 35 Case 36 Bracket 40 Rotating pin 50 Fixed pin 60 Control apparatus 100 Chain Tensioner W Material X Virtual line Y Transport direction Z Virtual vertical line

Claims (1)

A rotating table, two rotating pins erected on the rotating table, a driving means for rotating the rotating table, two fixed pins provided beside the two rotating pins, and the two Slide means for moving the two fixed pins together with the rotating pin,
The sliding means includes a first rail, a first slide member that moves along the first rail, and a first slide member that is disposed on the first slide member and extends in a direction different from the extending direction of the first rail. A second rail, and a second slide member that moves along the second rail,
The drive means is attached to the second slide member,
When the rotary table is rotated by the driving means in a state where a linear material made of a metal rod or a metal plate is inserted between the two rotating pins, the rotation of the entire material by the two rotating pins causes the rotation of the entire material. A bending apparatus in which a material is bent by applying a stress by a rotating pin to a portion that is regulated by a fixing pin and further sandwiched between two rotating pins.