JPH0512053B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a bending device that performs bending along the axis of a long workpiece whose cross-sectional shape is substantially constant along the longitudinal direction. Regarding.

(Prior Art) A long straight extruded aluminum alloy material of various shapes such as I-shape, L-shape, and U-shape, which has a substantially constant cross-sectional shape along the longitudinal direction, is used as a workpiece W. In the two-dimensional direction, for example, R ₁ , R ₂ , R ₃ , R ₄ , etc., as shown in _FIG. As if bending with a curvature like
As a bending device for long workpieces, JP-A-62-
158530 and a bending device shown in a partially cutaway sectional view in FIG. 13, which was filed earlier by the applicant of the present application, is known.

The bending apparatus shown in FIG. 13 includes a delivery device 103 equipped with two sets of delivery rollers 101, upper and lower support rollers 105 that are located in front of the delivery device 103 in the delivery direction and serve as bending support points for the work W, and left and right support It is composed of a support device 109 equipped with a roller 107, and a bending device 115 equipped with a vertical bending roller 111 and a left-right bending roller 113, which are located further forward of the support device 109 and serve as a point of action for bending the workpiece W.

The bending device 115 bends the workpiece W three-dimensionally by swinging the bending point in the horizontal direction about the vertical axis 119 or vertically about the horizontal axis 121 with respect to the body 117. Apply bending process.

The workpiece W subjected to such bending processing has variations in the width and thickness dimensions of its cross-sectional shape during extrusion molding due to manufacturing errors.
In particular, there is a lot of variation between lots. Therefore, during bending, the workpiece W and the left and right bending rollers 1
13 or the vertical bending roller 111. 〓If you perform a bending process with a gap occurring, for example, if you try to change the bending angle after bending with a certain curvature, you will not be able to change the bending angle instantly. , accurate bending cannot be expected.

For this reason, conventionally, the bending device 115 is shown in FIG.
As illustrated for the left and right bending rollers 113 in , for a workpiece Wa with a wide dimension, a small diameter left and right bending roller 113a shown by a solid line in the figure is used, while a workpiece with a narrow width shown by a two-dot chain line is used.
For Wb, a large-diameter left and right bending roller 113b is used, and in fact, several sets of left and right bending rollers with different diameters are prepared to accommodate variations in the width dimension of the workpiece W. If necessary, in the same way as above, several sets of vertical bending rollers 111 with different diameters are prepared to accommodate variations in the thickness of the work W, and the left and right support rollers 107 and the vertical support rollers of the support device 109 are As for the bending device 105, several sets of different diameters may be prepared as in the case of the bending device 115.

(Problem to be Solved by the Invention) Therefore, in the conventional structure, the left and right bending rollers 113 have diameters that correspond to the actual variations due to manufacturing errors in the width and thickness of the workpiece W to be bent. It is necessary to replace the left and right support rollers 107, etc. for each lot, which has particularly large variations, making the work extremely complicated. Moreover, in practice, there is a limited number of rollers with different diameters, so it is not possible to accurately respond to the continuously changing width and thickness dimensions. The above-mentioned gap may appear between the interval and the width and thickness of the workpiece W, which causes a slight deviation in the bending curvature after processing.

This invention was made by focusing on such conventional problems, and even if there are variations in the width or thickness of the workpiece, it can be easily fixed between a pair of bent members without requiring complicated work. The purpose is to be able to adjust the spacing or the spacing between a pair of support members.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a delivery device that delivers a long workpiece having a substantially constant cross-sectional shape along the longitudinal direction, and a delivery device. a bending device that is located forward in the delivery direction of the workpiece and has a bending point of action for bending the workpiece;
a support device disposed between the delivery device and the bending device and having a bending support point for the workpiece and supporting the workpiece, the bending device having a bending member located adjacent to the outer surface of the workpiece; However, this bending member is provided with an eccentric support shaft, and is movable in a direction crossing the axis of the workpiece by rotation of the support shaft, so that the distance between the bending member and the outer surface of the workpiece can be adjusted. It is composed of

Further, the present invention includes a delivery device that delivers a long workpiece having a substantially constant cross-sectional shape along the longitudinal direction, and a point of action for bending the workpiece located in front of the delivery device in the delivery direction. a bending device that performs bending processing by bending the workpiece, and a support device that is provided between the delivery device and the bending device and has a bending support point for the workpiece and supports the workpiece, the support device being adjacent to the outer surface of the workpiece. It has a pair of supporting members that are positioned opposite each other with the workpiece in between, and the support members have eccentrically provided support shafts, and the rotation of the support shafts causes the pair of support members to move in a direction perpendicular to the axis of the workpiece. may be configured to be movable and the distance between the pair of support members to be adjustable.

(Function) The workpiece sent out by the sending device is held between a pair of support members of the support device, and furthermore, the outer surface contacts the bending member of the bending device in front of it, and this bending member is aligned with the axis of the workpiece. By moving in a direction that intersects with , the support device side becomes the bending support point,
Bending is performed using the bending device as the bending point.

At this time, if there is a gap between the bending member and the workpiece or between the supporting member and the workpiece due to the width or thickness of the workpiece, the distance between the bending member and the outer surface of the workpiece. Alternatively, by adjusting the distance between the pair of support members, the bending member or the support member will come into contact with the workpiece immediately, and the curvature of the workpiece after bending will be less likely to be distorted.

As a result, accurate bending can be performed even on workpieces with different widths and thicknesses, without the complicated work of replacing bending members or supporting members.

(Example) Next, an example of the present invention will be described based on the drawings.

FIG. 3 is a partially cutaway sectional view of the bending device.

This bending device includes a sending device 1 that sends out a workpiece W, a bending device 3 that is located in front of the sending device 1 in the workpiece sending direction and performs bending on the workpiece W, and the feeding device 1 and the bending device 3. and a support device 5 that is interposed between the two and supports the workpiece.

In the delivery device 1, two sets of upper and lower delivery rollers 7, which are rotated by a drive source (not shown), are arranged above and below the work W, and are arranged in front and rear, and send the work W toward the support device 5. The support device 5 includes upper and lower support rollers 9 as a pair of upper and lower support members that support the upper and lower surfaces of the workpiece W on the forward side in the feeding direction of the workpiece W, and a pair of left and right support members that support the left and right surfaces of the workpiece W. Left and right support rollers 11 are rotatably provided around support shafts 13 and 15. These support rollers 9 and 11 serve as bending support points for bending the workpiece W. A pair of support rollers 17 that support the workpiece W are also rotatably provided on the rear side of the support device 5 in the workpiece delivery direction.

The bending device 3 includes a fuselage 19 and a base 2 on the fuselage 19.
1, an outer frame 23 on a base 21, and an inner frame 25 supported by the outer frame 23. The inner frame 25 includes a pair of upper and lower bending rollers 27 as a pair of upper and lower bending members that roll in contact with both the upper and lower surfaces of the workpiece W, and a pair of left and right bending rollers that are provided with outer wheels that roll in contact with both the left and right sides of the workpiece W. Left and right bending rollers 29 serve as bending members, and each bends a support shaft 31.
and 33. The portions of the respective bending rollers 27 and 29 serve as bending application points for bending the workpiece W.

Further, the support shaft 33 of the left and right bending roller 29 is rotatable as described below, and the left and right bending roller 29 is rotatable as described below.
The left and right bending rollers 29 are formed so as to be eccentric with respect to the axis of the workpiece W, and the left and right bending rollers 29 can be deflected and moved in a direction crossing the axis of the workpiece W by rotation of this support shaft 33. The spacing between them is adjustable.

These vertical bending rollers 27, left and right bending rollers 2
An auxiliary roller 35 that contacts the lower surface of the workpiece W is rotatably provided on the inner frame 25 on the front side in the workpiece delivery direction of No. 9 .

Next, an example of the eccentric structure of the left and right bending rollers 29 and the support shaft 33 of the bending device 3, and an example of an interval adjustment mechanism between the rollers will be explained based on FIGS. 1 and 2.

FIG. 1 is a front view from the front side in the workpiece delivery direction, showing the left half of the main part of the bending device 3 as a sectional view, and FIG. 2 is a view taken along the - line in FIG. A workpiece W having an opening groove a formed along the longitudinal direction is inserted into the opening groove a when the core bar 37 attached to the support device 5 is inserted into the opening groove a so that the left and right flanges of the workpiece W are formed in the opening groove a during bending. This shows the case where the bending process is performed while being careful not to fall down.

The lower mounting plate 39 shown in FIG. 1 is attached to the inner frame 25 shown in FIG. 3, and this lower mounting plate 39 and
Left frame 41 and right frame 43 attached to this
Accordingly, the upper and lower portions of the support shaft 33 of the left and right bending rollers 29 are respectively supported.

The left and right bending roller 29 has a cylindrical roller body 45 formed integrally with the support shaft 33, and the axis _C1 of the roller body 45 is eccentric by a dimension e with respect to the axis _C2 of the support shaft 33. . A cylindrical inner ring 47 is fitted around the roller body 45, and a cylindrical outer ring 49 is attached to the outer circumferential side of the inner ring 47.
1, and collars 52 are fixed to the upper and lower ends of the outer ring 49. And the spindle 3
By adjusting the rotation of the left and right bending rollers 29 around 3, the distance between the outer surfaces of the pair of left and right outer rings 49 can be adjusted to 4e in total since the adjustment dimension is twice the eccentricity dimension e on only one side of the left and right. The value of can be adjusted steplessly.

As an example of the rotation adjustment mechanism 53 for adjusting the rotation of the support shaft 33, the one shown in FIG.
Passive gears 55 and 57 of the same diameter that mesh with each other are fitted to each end of the support shaft 33 on the right side using a key 59, and a drive gear 61 of a small diameter that meshes with the passive gear 55 on the left side is fitted. The drive shaft 63 is fitted with a key 65 to the drive shaft 63 which is pivotally supported on the lower mounting plate 39.
is fixed by a set screw 67 screwed into the lower mounting plate 29. Set screw 6
7 and rotate the drive shaft 63 manually or by a motor (not shown) by a predetermined angle, the drive gear 61 also rotates, and the left and right passive gears 55 and 57 rotate in opposite directions to rotate the pair of left and right gears. Roller body 45
The outer surfaces of the two can move away from each other or approach each other to accommodate the width dimensions w ₁ and w ₂ of the workpiece W, as illustrated in FIG. Thereafter, when the set screw 67 is tightened, the drive shaft 63, the drive gear 61, and the driven gears 55, 57 can no longer rotate, and the distance between the outer surfaces of the pair of left and right outer rings 49 is fixed.

The support shaft 33 is secured to the left frame 41 and the right frame 43 by a snap spring 69, and the drive gear 61 and driven gears 55, 57 are secured to the drive shaft 63 and the support shaft 3 by a snap spring 71.
3, each is prevented from falling out.

Another example of the eccentric structure of the left and right bending roller 29 is shown in FIG. 7 as a longitudinal sectional view, and FIG. 8 as a sectional view taken along the line - in FIG. 7.

An outer ring 73 having an inner diameter larger than the outer diameter of the roller body ₄₅ by a dimension S is fitted onto a cylindrical roller body 45 that is eccentric by a dimension e with respect to the axis C2 of the support shaft 33. . In this case, during bending, even if the workpiece W has a large width w ₁ (Fig. 9), or a small workpiece W with a width w ₂
Even in the case (Fig. 10), the outer ring 73 always rotates with the feeding operation of the workpiece W while being in contact with the point of the roller body 45 closest to the workpiece W, and the workpiece with a value equivalent to four times the eccentricity e. The outer ring 73 is attached to the outer surface of the workpiece W due to variations in the width dimension of the workpiece W.
can always be pressed with a constant pressure force.

In the eccentric structure of the left and right bending roller 29 as the first example explained in FIGS. The rolling contact movement is smooth with little resistance, but this seventh
The eccentric structure of the left-right bending roller 29 shown in FIGS. 8 and 8 does not require the needle roller 51 as in the first example, and therefore has the advantage that the structure is simple and can be implemented at low cost.

Above, the eccentric structure and the inter-roller spacing adjustment mechanism 53 have been explained as a representative of the left and right bending rollers 29 as bending members of the bending device 3. However, the vertical bending rollers 29 as other bending members of this bending device 3
7 and its support shaft 31, and the left and right support rollers 11 and their support shafts 1 as respective support members of the support device 5.
5. Regarding the upper and lower support rollers 9 and their support shafts 13, the same eccentric structure and inter-roller spacing adjustment mechanism as described above for the bending rollers 29 and their support shafts 33 can be applied without any problem. Therefore, it is possible to constantly contact workpieces W having various widths and thicknesses with a constant pressing force and exert the functions of a bending point of action and a bending support point.

By using rotatable bending rollers or support rollers as bending members or support members,
The sliding resistance with the workpiece W is reduced, so no scratches occur on the outer surface of the workpiece W, and since there is point contact with the workpiece W, the bending point of action or bending support point does not wobble, allowing stable bending at all times. I can do it.

Note that for these bending members and support members, shoes that make surface contact with the workpiece W may be used instead of the rotatable rollers. In this case as well, a rotatable shaft portion is provided with respect to the shoe body as in the embodiment,
What is necessary is to make the support shaft eccentric with respect to this shaft portion.

As shown in FIG. 5, which is the view of arrow V in FIG. 3, the bending device 3 in the illustrated example has an upper surface formed in a semicircular concave curved surface, and a concave groove 75 is formed here to extend in the arc direction. has been done. On the other hand, the lower surface of the base 21 is formed with a convex arcuate surface matching the arcuate surface of the body 19, and a convex rail 77 that slides into a concave groove 75 is formed here. A toothed portion is formed on the lower surface of the convex rail 77 over almost the entire length, and this toothed portion meshes with a drive gear 79 attached to the fuselage body 19. The drive gear 79 is driven by a drive source such as a motor (not shown), and this drive causes the base 2
1 swings along the concave groove 75 and twists the workpiece W. The center of the circular arc surface on the concave surface of the machine body 19 and the convex surface of the base 21 is located at the workpiece W.
This coincides with the longitudinal direction of the workpiece W, that is, the center of twisting when the workpiece W is twisted.

The outer frame 23 has a hollow rectangular cross section, and is attached to the base 21 so as to be rotatable about a vertical axis 81. A toothed portion 83 having an arcuate shape centered on the vertical axis 81 is formed on the lower side surface of the outer frame 23, and a worm gear 85 that is rotated by a drive source such as a motor (not shown) meshes with the toothed portion 83. As the worm gear 85 rotates, the outer frame 23 rotates about the vertical axis 81, thereby bending the workpiece W in the left-right direction.

Like the outer frame 23, the inner frame 25 is formed into a hollow rectangular cross section, and is rotatably supported relative to the outer frame 23 via a horizontal shaft 87.
One end of the horizontal shaft 87 projects outward from the outer frame 23, and a gear 89 is attached to this projecting portion. The gear 89 meshes with a worm gear 91 that is rotated by a drive source such as a motor (not shown). The rotation of the worm gear 91 causes the inner frame 25 to rotate around the horizontal axis 87, thereby causing the workpiece W to rotate.
is bent in the vertical direction.

The operation of the bending device configured as described above will be described with respect to the case where the workpiece W is bent in the left-right direction.

First, in order to adjust the distance between the pair of left and right outer surfaces of the left and right bending rollers 29 of the bending device 3 in accordance with the width dimension of the workpiece W, the setscrew 67 is loosened and the drive shaft 6
3 by a predetermined angle manually or by a motor. Drive gear 6 due to rotation of drive shaft 63
1, the left and right passive gears 55 and 57 rotate in opposite directions, and the outer surfaces of the left and right roller bodies 45 move away from or approach each other, causing the left and right outer wheels 4 to rotate in opposite directions.
The mutual distance between the outer surfaces of 9 is the width dimension of the workpiece W.
Corresponds to w ₁ to _{w 2} . Next, when the setscrew 67 is tightened, the drive shaft 63, drive gear 61, and passive gear 5
5 and 57, the left and right roller bodies 45 are also unable to rotate, and the distance between the outer surfaces of the pair of left and right outer rings 49 is fixed.

Next, the work W is sent out by the sending device 1, and when it reaches the support device 5, the opening groove a
The core metal 37 is inserted into the bending device 3, and the work W reaches the bending device 3 while the core metal 37 is in sliding contact with the inner surface of the opening groove a of the work W, and a predetermined bending process is performed on the work W.

In the bending device 3, as the workpiece W is fed out, the outer surfaces of the left and right bending rollers 29 are pressed against the left and right outer surfaces of the workpiece W by the eccentric structure described above, regardless of variations in the width dimension of the workpiece W. The outer ring 49, which is in contact with the outer surface of the roller body 45 under pressure, rotates smoothly with respect to the roller body 45 via the needle roller 51.

When bending the work W, the outer frame 23 rotates left and right about the vertical axis 81 when bending the work W in the left-right direction as described above. At this time, the workpiece W slides on the core bar 37 and is bent left and right using the left and right bending rollers 29 of the bending device 3 as a bending point and the left and right support rollers 11 of the support device 5 as a bending support point. .

In the embodiment described above, only the left and right bending rollers 29 of the bending device 3 have an eccentric structure. An eccentric structure may be adopted for 11, and various modifications can be used depending on the actual dimensional tolerance of the workpiece W.

In addition, the spacing adjustment mechanism 53 between the rollers in the illustrated example
is a passive gear 5 that meshes a pair of support shafts 33 with each other.
5 and 57, it has the advantage that the distance between the rollers can be adjusted by a simple structure in which the rotation of the drive gear 61 that meshes with the passive gear 55 is adjusted. Any suitable adjustment mechanism other than those shown may also be used.

Furthermore, a bending roller 29 arranged in the bending device 3,
31 do not necessarily need to be arranged in pairs; for example, when bending only in one direction, it is sufficient to provide a bending roller only on the pressing side.

〔Effect of the invention〕

As explained above, according to the present invention, the distance between the bending member and the outer surface of the workpiece or the distance between the pair of support members is configured to be adjustable, so that the width and thickness of the workpiece can be adjusted to avoid manufacturing errors. Even if the bending member or support member is different from one another, the outer surface of the bending member or support member will come into contact with the workpiece immediately, without requiring the complicated work of replacing the bending member or support member accordingly. , the bending curvature of the workpiece after bending can be accurately set to a predetermined value.

[Brief explanation of the drawing]

FIG. 1 is a left half vertical sectional front view of the main parts of a bending device in an embodiment of the present invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a partially cutaway side view of the bending device. 4 is a plan view of FIG. 3, FIG. 5 is a view taken along the V arrow in FIG. 3, FIG. 6 is an explanatory diagram of eccentric adjustment by a bending member, and FIG. 7 shows another embodiment of the bending member. A vertical cross-sectional view, FIG. 8 is a cross-sectional view taken along the - line in FIG. 7,
Figures 9 and 10 are explanatory diagrams of eccentric adjustment using the bending member in Figure 8, Figure 11 is a plan view of the workpiece after processing, Figure 12 is a view taken in the direction of arrow XII in Figure 11, and Figure 13 is FIG. 14 is a partially cutaway side view of a conventional bending device, and FIG. 14 is a front view of the main part of FIG. 13. DESCRIPTION OF SYMBOLS 1... Delivery device, 3... Bending device, 5... Support device, 9... Upper and lower support rollers (support member), 11
... Left and right support rollers (supporting members), 27 ... Up and down bending rollers (bending members), 29 ... Left and right bending rollers (bending members), W ... Work.

Claims (1)

[Scope of Claims] 1. A delivery device that delivers a long workpiece with a substantially constant cross-sectional shape along the longitudinal direction, and a bending point of the workpiece located in front of the delivery device in the delivery direction. a bending device that performs bending processing, and a support device that is provided between the sending device and the bending device and has a bending support point for the workpiece to support the workpiece, and the bending device The bending member is located adjacent to the surface, and the bending member has an eccentric spindle, and is movable in a direction perpendicular to the axis of the workpiece by rotation of the spindle. A bending device for a long workpiece, characterized in that the distance between the workpiece and the outer surface is adjustable. 2. The bending device for a long workpiece according to claim 1, wherein the bending device includes a pair of bending members disposed opposite to each other with the workpiece in between. 3. A pair of eccentrically provided support shafts are located at symmetrical positions with the workpiece in between, and are interlocked and connected to each other so that the pair of bending members can move toward and away from each other. An apparatus for bending a long workpiece according to claim 2. 4. The apparatus for bending a long workpiece according to claim 1, 2 or 3, wherein the bending member comprises a rotatable bending roller supported by a support shaft. 5. A delivery device that sends out a long workpiece with a substantially constant cross-sectional shape along the longitudinal direction, and a bending device that is located in front of the delivery device in the delivery direction and has a bending point of action on the workpiece. a bending device that performs bending, and a support device that is provided between the delivery device and the bending device and has a bending support point for the workpiece and supports the workpiece, the support device being located adjacent to the outer surface of the workpiece. and a pair of supporting members arranged oppositely with the workpiece in between, and the supporting members have an eccentric support shaft, and rotation of the support shaft causes the pair to be displaced in a direction crossing the axis of the workpiece. A bending device for a long workpiece, characterized in that the distance between a pair of support members is adjustable. 6. The pair of eccentrically provided support shafts are located at symmetrical positions with the workpiece in between, and are interlocked and connected to each other so that the pair of support members can move toward and away from each other. The bending apparatus for a long workpiece according to claim 5. 7. Claim 5, wherein the support member comprises a rotatable support roller supported by a support shaft.
Or the bending device for a long workpiece described in 6.