JPH07110381B2 - Method and apparatus for aerbending straight sloped wall profiles - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for radius-bending a straight inclined wall section, that is, a straight extruded section having a cross section showing an inclined wall section. Is.

(Prior Art) Extruded shape members are formed into various cross-sectional shapes, and since they are straight, curved or annular materials can be bent variously by a roll processing machine conventionally called a ring former or the like. It has gained.

(Problems to be solved by the invention) However, the curved profile and the annular profile obtained by the conventional roll processing method and device have a simple horizontal cross section and have only vertical and horizontal walls. Although there is a demand for a profile with an inclined wall in the cross section, it is impossible to process due to extreme wrinkling or bending in the inclined wall of the cross section in the round bending step from a straight profile. It has not been realized yet because it will result in poor processing.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a method of inventing a straight sloped wall shape member and a main roll having an outer peripheral shape adapted to the front and back shapes thereof. When feeding while pressing with the pressing roll, the side of the inclined wall that has a small radius of curvature is strongly pressed, and the introduction position between the main roll of the profile and the pressing roll is set to the pressing roll. It is regulated by a retaining roll that is at the same position as or slightly more advanced than that, and the feeding direction from between the main roll and the pressing roll of the profile is regulated according to the radius bending curvature of the profile, It is characterized in that the slanted wall profile is bent to a predetermined curvature.

Further, as an invention of an apparatus for carrying out the invention of the above-mentioned method, a main roll on a turntable, a pressing roll for pressing a straight sloped wall shape member to the main roll, and a main roll and a pressing roll are fed. The main roll, the pushing roll, the holding roll, and the restraining roll that regulates the position of the straight sloped wall shape member and the direction regulation means that regulates the feeding direction of the workpiece fed from between the main roll and the pushing roll. Each of the rolls has an outer peripheral shape that conforms to the shape of the straight sloped wall section with which they are in contact, and the gap between the main roll and the pressing roll is set to a small curvature of the sloped wall section of the straight sloped wall section. It is characterized in that the radius is set to be smaller on the side of the radius, and the holding roll is formed on the main roll and the retaining roll with respect to the upper edge of the straight inclined wall profile.

(Operation) In the invention of the above method, when the straight sloped wall profile is fed while being compressed between the main roll and the pressing roll, the straight sloped wall profile is clamped on the transverse line by the clamping part. The pressing action, the regulation of the feeding position between the main roll and the pressing roll of the straight inclined wall shape member, and the bending action by the regulation of the feeding direction from between the main roll and the pressing roll are exerted, The bending deformation according to the regulation can be continuously applied in the bending-accelerated state by the clamping pressure, and the straight sloped wall profile can be curved in a rounded shape in sequence.

In particular, clamping the straight sloped wall profile between the main roll and the pressing roll is performed by strengthening the compression pressure on the side of the sloped wall portion of the straight sloped wall profile that has a small radius of curvature. Sometimes the compression side becomes thicker and the portion that is prone to waviness is kept on a smooth surface with a predetermined thickness, and the excess thickness is extended to the tension side during roll bending, and the large curvature of the inclined wall part occurs It can be moved to the radius side to maintain a predetermined wall thickness.

In the invention of the device, by the turntable-shaped main roll, the pressing roll, the retaining roll and the direction regulating means,
A small curvature of the sloped wall portion of the straight sloped wall section with a small gap on the side of the sloped wall section of the straight sloped wall section that is set between the main roll and the pressing roll. It is possible to realize the round-bending process of the straight sloped wall shape member while strongly pinching the radius side. In particular, the top surface of the turntable and the flange of the main roll not only regulate the position of the straight sloped wall shape from above and below by the clamping bending deformation part, but also make sure that it is not in front of the clamping bending deformation part. By the pressing flange surface of the roll and by the direction regulating means at the rear of the pressing and bending deforming portion, the straight sloped wall is placed in the vertical position corresponding to the restricting position by the main roll, the turntable and the retaining roll in the pressing and bending deforming portion. It is possible to maintain the shape and prevent twisting and falling of each part due to bending deformation by pinching.

(Embodiment) An embodiment of the present invention shown in FIGS. 1 to 3 will be described. As shown in FIG. 1, a turntable 2 is mounted on the machine base 1.
Of the main roll 3 installed on the turntable 2 and the pressing roll 7 and the retaining roll 8 separately supported by the movable arms 4, 5, and 6 on the machine base 1 to form a straight inclined wall shape. The material 21 is curved.

Such an apparatus configuration is known, and the main roll 3 is fixed on the turntable 2 by a center shaft 10 and a nut 11. The rolls 7 and 8 are the arms 4 and 5, respectively.
It is attached and fixed to a rotating shaft (not shown) that is held in.

In this embodiment, a case where a straight aluminum extruded shape member 21 having a cross-sectional shape and having an inclined wall portion 21a as shown in FIG. As shown in FIG. 2, the shape member 21 has a draining flange 21c provided on an upper portion of an inclined wall portion 21a through a vertical wall portion 21b, and a screwing hole 21d for joining is formed on the back side of the base portion of the draining flange 21c. ing. Further, a vertical wall portion 21e is provided below the inclined wall portion 21a.
A screwing hole 21f for joining is formed on the back side of the lower edge of 21e.

This profile 21 is used to form the gully portion of a building or vehicle by arranging it at appropriate intervals in the vertical direction. You will be able to.

The radius bending of the shape member 21 is performed so that the upper portion of the inclined wall portion 21a is on the small radius side and the lower portion is on the large radius side as shown in phantom lines in FIG. 1 and FIG. The surface A is the inner surface in the radial direction after R-bending, and the surface B is the outer surface in the radial direction after R-bending.

Therefore, as shown in FIG. 3, the outer peripheral surface 3a of the main roll 3 is
Into a shape that conforms to side A of the profile 21, and press roll 7,
The outer peripheral surfaces 7a and 8a of the retaining roll 8 are shaped so as to match the B surface of the shape member 21. Further, on the outer circumferences of the main roll 3 and the retaining roll 8, presser flange surfaces 3b and 8b for the upper edge of the shape member 21 are formed.

A procedure for radius-bending the profile 21 along the main roll 3 with the above apparatus will be described.

First, the end of the shape member 21 is applied to the outer peripheral surface 3a of the main roll 3 with its A surface side, and the clamp claw 15 provided on the turntable 2 is operated by the screw shaft 16 and the main via the silicone rubber pad 17. The front end portion of the profile member 21 applied between the roll 3 and the outer peripheral surface 3a is clamped as shown in FIGS.

Next, the pressing roll 7 is moved forward to press the profile 21 whose end portion is clamped to the outer peripheral surface a of the main roll 3 against the outer peripheral surface 7a, and press it against the outer peripheral surface 3a of the main roll 3. . This pinching is performed at one position in the transverse direction of the shape member 21.
This pinching form becomes stronger at the upper part, which is the side with a small radius of curvature of the inclined wall part 21a of the shape member 21, so that the shape and support state of the respective peripheral surfaces 3a, 7a of the main roll 3 and the pressing roll 7 become stronger. It is obvious that the gap between the main roll 3 and the pressing roll 7 becomes smaller on the side having the small radius of curvature of the inclined wall portion 21a.

The clamping force at this time is, for example, 1 for a profile member 21 with a wall thickness of 1.1 mm.
It was set to about 60 kg / cm ² . Due to this clamping pressure, the inclined wall portion 21
Main roll 3 and pressing roll 7 are on the upper and lower sides of a.
Due to this, an inverted delta-shaped indentation was formed, and after the curved deformation in the delta-shaped range, which was curved along the outer peripheral surface 7a side of the pressing roll 7, was observed at the lower portion of the inclined wall portion 21a. In addition, the vertical wall 21e is continuously
Even after that, a curved deformation in the reverse delta range was observed.

After the pressing of the profile 21 by the advancing of the pressing roll 7, the retaining roll 8 is advanced by the same amount as the pressing roll 7 or by a little x shown in FIG. 3 to push the profile 21 to move the profile 21. The position behind the pinched portion is regulated.

In this state, the turntable 2 is driven in the direction indicated by the arrow C, and the set profile 21 is bent.

Due to the rotation of the turntable 2, the profile 21 receives the clamped feed force to the front end side and is fed out between the main roll 3 and the push roll 7 with the rotation of the push roll 7. . At this time, the profile 21 is the main roll 3
The feeding position between the pressing roller 7 and the pressing roller 7 to the pressing portion is regulated by the retaining roller 8, and the feeding direction from the pressing portion is regulated by the clamp claw 15 and the outer peripheral surface 3a of the main roll 3. It Further, the holding flange surface 3b of the main roll 3, the upper surface of the turntable 2 and the holding flange 8b of the retaining roll 8 also regulate the vertical height position and partial falling of the profile member 21.

The shape member 21 undergoes bending deformation under the clamping pressure due to the position and the direction regulation on both sides of the clamping portion, and the main roll 3
Along the outer peripheral surface 3a. As a result, the rounded shape of the shape member 21 is curved along the outer peripheral surface 3a of the main roll 3.

The curved profile 121 thus obtained does not have wrinkles or waviness in any part and maintains the initial cross-sectional shape.
21a is kept approximately the same thickness. There is no overall twist or fall. Further, there is not much difference between the length of the profile 21 at the intermediate height position of the inclined wall portion 21a and the length of the curved profile 121.

However, the profile 21 had a height of about 55 mm and a width of about 32 mm. Further, at the front end edge of the shape member 121 after the R-bending, extension in the lengthwise direction was found at the upper edge portion and shrinkage was found at the lower edge portion. This seems to be the difference in that the deformation difference between the extension deformation side and the contraction deformation side at the time of radius bending was not absorbed and absorbed.

In this rounded bending work, continuous bending is performed as it is for a length close to the entire circumference of the main roll 3 as long as the front end of the shape member 121 does not interfere with the front shape member 21 fed to the pressing portion. It is possible to do so, and if the front end of the profile 121 overlaps the profile 21 at the same time when the clamp is redone, there will be a slight twist in the whole, but it is possible to make the profile 121 continuous in a coil shape. You can also bend it.

The twist of the shape member 121 can be easily corrected by twisting back later. However, it is also possible to use the twist as it is.

When the position restriction of the shape member 121 is released, the radius bend state is slightly relaxed due to a slight springback. Since this springback amount can be known in advance from an empirical rule, the diameter of the main roll 3 may be set in consideration of it.

However, it is possible to perform radius bending without being restricted by the diameter of the main roll 3.

The method will be described with reference to FIG. As shown in the figure, the shape member 21 in the above embodiment is not clamped by the clamp claws. Instead, a rear roll 108, which is the same as the backup roll 8, is attached to the movable arm 6 as well, and the profile is sent out from the pressing portion between the main roll 3 and the pressing roll 7.
It presses against 21 and forcibly presses it inward in the feeding direction to regulate the feeding direction of the shape member 21 from the pinching portion, and other points are common to the above-mentioned embodiment. is there.

In this embodiment, the degree of bending deformation applied to the shape member 21 at the pressing portion is small and the radius of curvature is larger than the outer diameter of the main roll 3 due to the loose regulation of pushing the shape member 21 inward with respect to the feeding direction. The profile 21 can be formed. Even in this case, the effect of springback must be taken into consideration.

By adjusting the advancing position of the rear roll 108, it is possible to obtain the curved member 21 having various radii of curvature.

(Effect of the Invention) According to the invention of the present method, since it has the above-mentioned configuration and action, it is possible to bend a straight shape member having an inclined wall portion with a good initial cross-sectional shape without wrinkles or waviness. it can. In particular, according to the invention of the present apparatus, the radius bending can be further performed without twisting or partial falling of the profile.

[Brief description of drawings]

FIG. 1 is a perspective view of a rounded portion of an apparatus according to an embodiment of the present invention, and FIG. 2 shows the outer peripheral shapes of a main roll and a pressing roll and the cross-sectional shape of a profile to be rounded. FIG. 3 is a cross-sectional view showing the relationship, FIG. 3 is a plan view of an essential part showing a radius bending process state, and FIG. 4 is a plan view of a radius bending part of the second embodiment of the present invention. 2 …… Turntable 3 …… Main roll 7 …… Pressing roll 8 …… Still roll 15 …… Clamp claw (Direction restricting means) 108 …… Rear roll (Direction restricting means)

Claims (2)

[Claims] 1. A small radius of curvature of a sloped wall portion is used for feeding a straight sloped wall shape member while sandwiching it between a main roll having an outer peripheral shape conforming to the front and back shapes and a pressing roll. The side is strongly pinched, and the introduction position between the profile member's May roll and the pressing roll is regulated by the retaining roll at the same position as the pressing roll or at a position slightly advanced from the pressing roll. The radius of the straight sloped wall profile is characterized in that the direction of delivery from between the pressing rolls is regulated according to the radius bending curvature of the profile to bend the straight sloped wall profile to a predetermined curvature. Bending method. 2. A main roll on a turntable, a pressing roll for pressing the straight sloped wall shape member against the main roll, and a position of the straight sloped wall shape member fed between the main roll and the pressing roll. And a direction regulation means for regulating the delivery direction of the workpiece delivered from between the main roll and the pressing roll.The main roll, the pressing roll, and the retaining roll are directly connected to each other. In addition to having an outer peripheral shape that matches the shape of the inclined wall section,
The gap between the main roll and the pressing roll is set to be smaller on the side where the smaller radius of curvature of the sloped wall portion of the straight sloped wall shape is set, and the straight sloped wall shape is used for the main roll and the retaining roll. A bending device for straight slanted wall profiles, characterized in that a presser flange surface is formed which is in contact with the upper edge of the.