JPH10211524A - Bending device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bending device with which bending work is executable from both end parts of a material to be worked such as a tube and also bending work over 180 deg. is executable in both right and left directions. SOLUTION: A chucking device 3 for materials to be worked of the bending device 1 is provided with a base 10, column 11 which is erected on this base 10 and chucking mechanism 12 which is projected from this column 11 in the horizontal direction. A bender device 4 for bending the materials to be worked is provided with the base 40, column 41 which is erected on the base 40, bending roll 42 which is provided in the upper part of this column 41, clamp 43 and tension roll 44. The bender device 4 is lowerable and movable to either side of the chucking mechanism 12 as to the longitudinal direction of a bed 2 through under the chucking mechanism 12, so the bending work is executable from both ends of the material to be worked and greatly swinging the bended part is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus, and more particularly to a bending apparatus for bending a tube for piping of an automobile or the like.

[0002]

2. Description of the Related Art Heretofore, a bending apparatus of this type is known from Japanese Patent Publication No. 8-29358.

[0003] This bending apparatus is a left and right bending type bender apparatus and is configured as follows. That is, a chuck mechanism for gripping one end of a long workpiece such as a tube for bending is provided so as to be movable along the longitudinal direction of the workpiece, and the rotary bending die and the rotary bending die are provided near and far from the rotary bending die. A clamping die that moves in the direction of the workpiece, the clamping die presses and clamps the workpiece on the peripheral side surface of the rotary bending die, and rotates the workpiece around the rotary bending die to extend in the longitudinal direction of the workpiece. Are sequentially bent from the front end side, a bending unit mechanism comprising a rotary bending die and a clamping die is made movable up and down, and a chuck mechanism for gripping the workpiece is moved in parallel in the workpiece feeding direction. It is provided as follows. In addition to this, while improving the workability by bending to the left and right, the rotary bending die is provided with a plurality of bending dies having different curvatures stacked on each other, and bending with different curvatures is performed by raising and lowering the bending unit mechanism. You can choose to do it.

[0004]

However, in the above-mentioned left and right bending type bender device, one end of the workpiece is gripped by a chuck mechanism and bending is sequentially performed from the front end side. When the vicinity of the part is bent, the length from the tip to the chuck mechanism becomes longer. Therefore, there is a possibility that the tip of the workpiece is swung largely and hits an object other than the bender device. In addition, since there is a pressing support unit near the bending unit mechanism, there is a problem that the bending angle is limited in order to prevent interference with the pressing support unit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to reduce the swing of the tip of the workpiece by enabling the workpiece to be processed from both ends. It is an object of the present invention to provide a bending apparatus capable of performing the bending.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, a bending apparatus according to the present invention comprises a bed, an elongated body supported on the bed so as to be movable in its longitudinal direction, and subjected to bending. In a bending device including a chuck device having a chuck mechanism for gripping a predetermined position of a workpiece and a bender device provided on the bed and performing bending of the workpiece, the chuck device is provided on a bed. A base, a column erected on the base, and a chuck mechanism provided at a position protruding horizontally from the column, the bender device includes a base movable on a bed, A column erected on a base, a bending roll provided on an upper portion of the column, a clamp for bringing the workpiece into close contact with the bending roll, and a means for pressing the workpiece against the bending roll The provided, vendor device passes below the chuck mechanism for movement on either side of the chuck mechanism in the longitudinal direction of the bed, characterized in that the relative height of the vendor device and the chuck mechanism and adjustable.

It is desirable that the bender device be movable in a direction perpendicular to the longitudinal direction of the bed.

The chuck mechanism comprises a pair of disks having a slit extending from one peripheral surface to the center hole, and a workpiece holding chuck sandwiched between the pair of disks. A drive mechanism can be provided to rotate the chuck about an axis passing through the center hole.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
A case where a tube is used as a workpiece will be described with reference to FIGS.

As shown in FIG. 1, the bending apparatus 1 includes a bed 2 and a chuck device 3 and a bender device 4 supported thereon. The bed 2 has a rectangular planar shape, and has, on its upper side, a chuck 2 for moving the chuck device 3 in the longitudinal direction of the bed 2 as shown in FIG.
The two chuck guide rails 5 and two bender guide rails 6 for moving the bender device 4 in the longitudinal direction of the bed 2 are fixed in parallel. A feed screw 7 into which the lower part of the bender device 4 is screwed is provided in parallel with the bender guide rail 6 between the two bender guide rails 6. A motor 8 (FIG. 1) as a driving mechanism for rotating is mounted. A plurality of legs 9 that enable horizontal adjustment of the bed are fixed to a lower portion of the bed 2. Note that the chuck device 3 is manually moved along the chuck guide rail 5, for example.

As shown in FIGS. 1 and 2, the chuck apparatus 3 includes a base 10, a column 11, and a chuck mechanism 12. The base 10 has, for example, a substantially square planar shape, a downwardly open fitting portion 13 fitted to the chuck guide rail 5 is fixed on the lower surface, and a columnar column 11 is erected on the upper surface. On the upper part of the column 11, the chuck mechanism 12 projects in a direction perpendicular to the longitudinal direction of the bed 2 and in a horizontal direction.

As shown in FIGS. 3 and 4, the chuck mechanism 12 includes two opposed fixed side plates 14 and a fixed side plate 14.
Two discs 15 rotatably supported inside the disc, a chuck 16 sandwiched between the discs 15, and a driving mechanism 17
And The two side plates 14 are formed parallel to each other with a predetermined interval formed on the upper portion of the column 11 with the side surfaces vertical, and project in the direction perpendicular to the longitudinal direction of the bed 2 and in the horizontal direction. A hole 19 having a diameter larger than the diameter of the tube 18 to be processed is formed at the center of the side plate 14 in the vicinity of the distal end. A slit 20 having a width close to the diameter is formed. A circular recess 21 having a diameter slightly smaller than the diameter of the disk 15 is formed on the inner surface of the side plate 14 in which the hole 19 is formed.
Are formed.

The two disks 15 are provided in parallel, and six circular recesses 22 are formed on the side surface of each disk 15 at equal intervals. Approximately の of the six bearings 23 in the axial direction of the outer ring are fitted into the recesses 22, and about の of the outer rings in the axial direction contact the inner peripheral surface of the circular recess 21 of the side plate 14. It has become. Further, a tooth portion 24 is formed on the outer periphery of each disk 15, and each disk has a hole 25 and a slit 26 of the same size and shape as the hole 19 and the slit 20 formed in the side plate 14. Are formed.

The chuck 16 includes a frame 27, a fixed plate 28, a movable plate 29, a link 30, and a pressing member 31, as shown in FIGS. The frame 27 is L
It has a structure in which two opposing parallel members protruding in a shape are provided at predetermined intervals, and a fixed plate 28 is fixed between these members, and a movable plate 29 6 and FIG. 6, the pressing member 31 is held so as to be slidable up and down, and the pressing member 31 is slidable left and right. The fixed plate 28 and the movable plate 29 each have a semicircular concave portion that forms a chuck hole 33 corresponding to the outer diameter of the tube 18 on the mating surface 32 adjacent to the fixed plate 28 and the movable plate 29. ing. One end of the link 30 is pivotally connected to the movable plate 29, and the other end is pivotally connected to the pressing member 31 via a pin 34.

As shown in FIG. 3, the drive mechanism 17 includes two gears 3 provided corresponding to the teeth 24 of the two disks 15.
5, a motor 36, a gear 37 mounted on a shaft of the motor 36, and a timing belt 38. The two gears 35 are pivotally mounted between the two side plates 14. The motor 36 is mounted on one outer side of the side plate 14, and a gear 37 mounted on the shaft of the motor 36 is located between the two side plates 14, and the tooth portion 24 of the disk 15, the gear 35,
A timing belt 38 is wound between 35 and the gear 37. Then, by driving the motor 36, the gear 37, the timing belt 38, the gears 35, 35
The chuck 16 is rotated via the disk 15 and the tube 18 held in the chuck hole 33 of the chuck 16.
Can be rotated. Also, 2
A chuck cylinder 39 is mounted on the upper part of the side plates 14. When the rod A of the chuck cylinder 39 presses the portion A of the pressing member 31 of the chuck 16 shown in FIG. From the position, the solid line position is taken, and the chuck hole 33 of the chuck 16 becomes circular as shown in FIG. Then, the motor 36 is driven to invert the chuck 16 by 180 °, and the portion B of the pressing member 31 is pressed by the rod of the chuck cylinder 39,
Since the movable plate 29 is separated from the fixed plate 28 as shown by an arrow E in FIG. 6, the tube 18 can be released from the chuck 16.

As shown in FIGS. 1 and 2, the bender device 4 includes a base 40, a column 41, a bending roll 42,
A clamp 43, a tension roll 44, a drive mechanism for raising and lowering and turning the bender device 4, and a bending roll 4
2, a driving mechanism for the clamp 43 and the tension roll 44.

As shown in FIG. 2, the base 40 includes a lower base 45 and an upper base 46. The lower part of the lower base 45 is fitted to the two bender guide rails 6 of the bed 2. The downwardly open fitting portion 47 to be fitted is
A screw portion 48 screwed to the feed screw 7 of the bed 2
Is fixed. Two guide rails 49 in a direction orthogonal to the bender guide rails 6 of the bed 2 are fixed to the upper part of the lower base 45, and the upper base 46 on the guide rails 49 is provided outside the guide rails 49. A cylinder 50 (FIG. 1) is mounted as a drive mechanism for moving. A downwardly open fitting portion 51 fitted to the guide rail 49 is fixed to a lower portion of the upper base 46, and a columnar column 41 is provided upright at the upper portion.

The bending roll 42 has a cylindrical shape as shown in FIGS. 7 to 10, and has a forming groove 52 having a semicircular cross section corresponding to the outer diameter of the tube 18 on its outer periphery. The bending roll 42 is rotatably mounted on the upper portion of the column 41 so that the axis is perpendicular to the axis. The bending roll 42 is driven by a bending roll motor 53 (FIG. 7) as a driving mechanism.

As shown in FIGS. 7, 9 and 10, a clamp groove 54 having a semicircular cross section corresponding to the outer diameter of the tube 18 is formed at the side of the distal end of the clamp 43. The center of the clamp 43 is connected to the column 41 by the pin 5.
The lower end is connected via a link 56 to a rod 58 of a clamping cylinder 57 as a drive mechanism. The clamping cylinder 57 is fixed to the column 41 below the clamp 43. Therefore, by operating the clamping cylinder 57, the clamp 43 pivots to bring the tube 18 into close contact with the forming groove 52 of the bending roll 42 as shown in FIGS. It is configured to prevent the bending roll 42 from coming off.

As shown in FIGS. 7 to 10, the tension roll 44 is used to bend the tube 18 pressed against the bending roll 42 via the clamp 43.
Pressing to the two sides, a forming groove 59 having a semicircular cross section corresponding to the outer diameter of the tube 18 is formed on the outer periphery, and two sets for right bending and left bending are provided on the bending roll 42. Have been. The tension roll 44 is axially mounted on the roll mounting member 60 so as to have a vertical axis. A slide member 61 is provided below the roll mounting member 60 so as to be able to move up and down along the column 41. A rod 63 of a tension roll cylinder 62 as a driving mechanism is fixed to a side portion of the cylinder 61. Therefore, by operating the tension roll cylinder 62, the tension roll 44 can press the tube 18 and bend to a predetermined angle, and the unused tension roll 44 slides the slide member 61 downward. The restraint is released and the robot is turned to the position of the imaginary line shown in FIG. 7 so as not to hinder the bending by the other tension roll 44.

In FIG. 2, reference numeral 64 denotes a bender device lifting / lowering cylinder as a drive mechanism, and reference numeral 65 denotes a bender device turning motor as a drive mechanism. By lowering the bender device 4, the bender device 4 can be moved below the chuck mechanism 12 and moved to either side of the chuck mechanism 12 in the longitudinal direction of the bed 2. Can be bent.

Next, the operation of the bending apparatus 1 will be described.

First, the motor 36 (FIG. 3) is driven,
Disc 15 and chuck 16 via timing belt 38
Is rotated, and the chuck 16 is rotated 180 ° from the rotation position in FIG.
Take the rotated position. At this position, the portion B of the pressing member 31 is pressed by the chuck cylinder 39 and the link 30 is pressed.
The movable plate 29 is fixed to the fixed plate 28 through an arrow E in FIG.
And the chuck hole 33 is opened. Motor 3
When the disk 6 is further driven, the disk 15 and the chuck 16 are further rotated, and when the slit 20 of the disk 15 faces upward, the motor 36 stops. Here, a predetermined position of the tube 18 is inserted into the holes 19 and 25 from the slits 20 and 26. Next, the portion A of the pressing member 31 is pressed by the chuck cylinder 39 to close the chuck hole 33 of the joint 32 between the fixed plate 28 and the movable plate 29 of the chuck 16 and the tube 18 is gripped.

Thereafter, the motor 8 (FIG. 1) is driven to rotate the feed screw 7, and the bender device 4 moves to a predetermined position. If necessary, the cylinder 50 for moving the upper base 46 (FIG. 1) and the cylinder 64 for raising and lowering the bender device are used.
(FIG. 2) and the bender device turning motor 65 are driven, and the tube 18 comes into contact with the forming groove 52 of the bending roll 42. Next, the clamping cylinder 57 is operated to operate as shown in FIG.
Then, the clamp 43 pivots in the direction indicated by the arrow Q, the clamp groove 54 of the clamp 43 comes into close contact with the tube 18, and the tube 18 is pressed into the forming groove 52 of the bending roll 42. Then, the bending roll motor 53 (FIG. 7) is driven, for example, as shown in FIG. 9, the bending roll 42 rotates in the direction indicated by the arrow P, and the tension roll cylinder 62 operates to operate the tension roll 44. Moves in the direction shown by the arrow R, and the tube 18
The tube 18 is bent in the direction shown by the arrow S while being pressed into the second forming groove 52, and the tube 18 is bent.

FIG. 9 shows a case where the tube 18 is bent to the left as viewed from the distal end side. When bending the tube 18 to the right as viewed from the distal end,
The bender device 4 is turned by the bender device turning motor 65, and the clamp 43 is turned in the direction of the arrow Q 'to bend the tube 18 as shown in FIG.
2 and the bending roll motor 53 is driven to rotate the bending roll 42 in the direction of the arrow P 'and move the tension roll 44 in the direction of the arrow R'. Therefore,
The tube 18 is bent in the direction of the arrow S 'to be bent.

In general, subsequent to this bending, the next and subsequent bending are often performed at different positions and in different planes. That is, by moving the bending position t ₂ to the tube 18 and then bending processing a vendor device 4 from the bending position t ₁ of the tube 18 which is bent as shown in FIG. 12, this bending position t ₂ After being positioned at the position of the bending roll 42, the bending process is performed by rotating the chuck mechanism 12 by the angle θ. by this,
Machining plane N inclined by angle θ with respect to previous machining plane M
Bending can be performed inside.

In this manner, the bending of the tube 18 at a predetermined position at a predetermined angle can be performed by the movement of the bender device 4 and the rotation of the chuck mechanism 12. The above operations of the bending apparatus 1 are all automatically performed by computer control. Then, even if the bent tube 18 is bent into a complicated shape, the side plate 14 of the chuck mechanism 12 of the chuck device 3 can be used.
And slits 20 and 26 opened in one direction in the disk 15.
Is formed, the tube 18 is connected to the bending apparatus 1
Can be easily removed from.

In the present embodiment, the member to be processed is the tube 18, but the same processing can be performed on a round bar.

[0029]

As described above, in the bending apparatus of the present invention, the workpiece chuck mechanism is provided at a position protruding in the horizontal direction from the column erected on the base on the bed. The bender device is lowered by the drive mechanism and moved in the longitudinal direction of the bed, and passes under the chuck mechanism and bends the long workpiece to a predetermined position at any position on the bed using the entire longitudinal direction of the bed. Processing, for example, bending from both ends can be performed. Since the bending of the bent portion can be reduced by performing the bending process from both ends, the possibility that the workpiece hits the worker, a part of the bending device, or another machine is reduced.

By providing all drive mechanisms below the bending roll and enabling the bender device to be turned, the workpiece can be processed in both the left and right directions over 180 ° without being obstructed by the drive mechanism. The object can be bent freely. The chuck mechanism has a structure in which a chuck for gripping a workpiece is mounted between a pair of disks forming a slit from one location on the peripheral surface to the center hole, and the disk is rotated by a drive mechanism. By rotating the chuck, it is possible to easily remove the long workpiece from the chuck mechanism even if the front and back of the workpiece are bent. Can be bent in any plane.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a bending apparatus according to the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is an enlarged view of a part of FIG. 2 showing details of a chuck mechanism.

FIG. 4 is a right side view of FIG. 3;

FIG. 5 is a detailed view of a chuck.

FIG. 6 is an explanatory view showing the operation of the chuck.

FIG. 7 is a partial side view of the bender device.

FIG. 8 is a partial front view of the bender device.

FIG. 9 is an explanatory view showing the operation of a bending roll, a clamp, and a tension roll.

FIG. 10 is another explanatory view showing the operation of the bending roll, the clamp, and the tension roll.

FIG. 11 is an explanatory view showing the operation of the clamp.

FIG. 12 is an explanatory view of bending of a tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bending apparatus 2 Bed 3 Chuck apparatus 4 Bender apparatus 12 Chuck mechanism 15 Disk 16 Chuck 17 Drive mechanism 18 Tube 19, 25 Hole section 20, 26 Slit 27 Frame body 28 Fixed plate 29 Movable plate 33 Chuck hole 42 Bending roll 43 Clamp 44 Tension roll 45 Lower base 46 Upper base 52, 59 Molding groove 54 Clamp groove

Claims (3)

[Claims] 1. A chuck device having a bed, a chuck mechanism supported on the bed so as to be movable in the longitudinal direction thereof and gripping a predetermined position of an elongated workpiece to be bent, and provided on the bed. And a bender device for bending the workpiece, wherein the chuck device includes a base on a bed, a column erected on the base, and a horizontal projection from the column. And a chuck mechanism provided at a set position, the bender device includes a base movable on a bed, a column erected on the base, and a bending roll provided on an upper portion of the column. A clamp for bringing the workpiece into close contact with the bending roll and means for pressing the workpiece against the bending roll are provided, and a bender device passes below the chuck mechanism and moves in the longitudinal direction of the bed. So that it can move on either side of the chuck mechanism Te, bending device, characterized in that the relative height of the vendor device and the chuck mechanism and adjustable. 2. The bending apparatus according to claim 1, wherein the bender device is movable in a direction perpendicular to a longitudinal direction of the bed. 3. A chuck mechanism comprising: a pair of disks having a slit formed from one peripheral surface toward a center hole; and a workpiece holding chuck sandwiched therebetween. 2. The bending apparatus according to claim 1, further comprising a drive mechanism for rotating the chuck and the chuck about an axis passing through the center hole.