JPH0140690B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method and apparatus for continuously bending the axis of an elongated member such as a molding material formed into an irregular cross-sectional shape.

Conventional technology Conventionally, window molding M for automobiles
etc. (see Fig. 4), following the roll forming machine 1 which bends a metal strip material _M1 such as stainless steel into a predetermined cross-sectional shape to form a molding material _M2 , A guide device 2 that slidably supports the molding material M ₂ in the axial direction, and a bending device that uniaxially swings in a two-dimensional direction with respect to the direction in which the molding material M ₂ is delivered linearly from the guide device 2. The bending devices 3 are sequentially arranged (see Fig. 5 a, b), and the bending device is swung left or right depending on the amount of feeding of the molding material M ₂ to continuously create different curvatures. It has already been proposed to bend the molding material _M2 along its axis (for example, in JP-A-57-
41828, 57-41829, 59-14793).

Problems to be Solved by the Invention However, in this bending process, the molding material M ₂ linearly fed out from the guide device 2 is inserted straight into the bending device 3 (see Fig. 6). After bending the bending device 3 to a desired curvature by uniaxially swinging the bending device 3 (see FIG. 6b), the bending device 3 is moved to bend the bending device 3 to the next different curvature (see FIG. 6b).
When the molding material _M2 is deviated in the feeding linear direction, the axis bends at a point C where the curvature changes to a different curvature _R1 → _R2 near the support point of the guide device 2,
A bending phenomenon occurs (see Figures 6c and 7).

Means for Solving the Problems In the method for bending continuous elongated members according to the present invention, the axial direction of the elongated member is changed when returning the elongated member's axis from the position where the elongated member is bent by curvature to the straight position. The fulcrum that supports linearly is separated in the opposite direction to the feeding direction of the long member, and the processing method is a bending device that bends the long member at different curvatures in two or three dimensions. The guide device that linearly slides the elongated member in conjunction with the displacement is configured to be performed by a device that moves away and back in a direction opposite to the feeding direction of the elongated member.

Function: In this bending method and device, the fulcrum that linearly supports the elongated member or the guide device that feeds and supports the elongated member linearly is moved away from the curvature bending point or the bending device to increase the distance. By removing the molding material, the axis of the molding material can be easily and reliably curved without causing the bending phenomenon.

Embodiments The following description will be made with reference to FIGS. 1 to 3.

This bending process is performed using a metal plate material that can be plastically processed to manufacture a window molding for an automobile similar to that shown in FIG. 4. The equipment includes a roll forming machine ₁₀ that forms a continuous molding material M2 by forming a metal strip material _M1 into a predetermined cross-sectional shape, and a roll forming machine 10 that forms a continuous molding material M2 by forming a metal strip material _M1 into a predetermined cross-sectional shape. An insertion guide cap 11 that prevents the molding material M ₂ from collapsing, a guide device 12 that slides and guides the molding material M 2 while keeping it straight, and a bending device 13 that curves the molding material M ₂ to a desired curvature are arranged in series. something is being used.

The guide device 12 includes a pair of left and right idling rollers that face each other with a gap between the insertion of the molding material M ₂ and are arranged in front and behind two sets 12a and 12b.
The molding material _M2 can be linearly slid and supported in the axial direction. Further, this guide device 12 is constructed based on a slide plate 15 placed on a machine stand 14, and by supporting the slide plate 15 with a slide guide 16, it can slide along the feeding direction of the molding material _M2 . installed on. The slide plate 15 has a machine stand 14
A connecting rod 17 is provided to protrude downwardly, and a drive cylinder 18 is installed to extend between the connecting rod 17 and appropriate locations on the machine base 14. This drive cylinder 18 moves the guide device 12 back and forth along the feeding direction of the molding material _M2 , and depending on the amount of movement thereof, a double cylinder can be installed. Further, the operation of this drive cylinder 18 can be controlled by a rotary encoder 19 that detects a predetermined delivery amount of the molding material M ₂ , and the encoder 19 can be disposed at the rear of the roll forming machine 10 .

In the bending device, a base plate 20 is uniaxially supported by a support shaft 21 on a machine base 14, and the base plate 20 is swung in two-dimensional directions to the left or right by a cam plate (not shown) that moves back and forth in the horizontal direction. It is constructed so that it can be deflected. In this swinging motion, the molding material _M2 is curved to the left or right with a desired curvature, but in addition, the molding material M2 is also curved in the vertical direction.
A pinch roll 22 that curves the axis of _M2 is provided so as to be able to swing up and down.

Using this bending device, the guide device 12
From this point, the molding material M ₂ is linearly fed into the bending device 13 (see Fig. 2 a), and from this state, the bending device 13 is swung to adjust the axis of the molding material M ₂ to the desired curvature R ₁ . After the molding material M 2 has been bent over its length (see FIG. 2b), the rotary encoder 19 detects its delivery length, and the bending device 13 bends the molding material M ₂ in order to change this curvature to a large curvature R ₂ . By moving the guide device 12 back to the feeding straight position side and operating the drive cylinder 18, the guide device 12 is moved to the bending device 1.
The molding material M 2 is moved backward in the direction opposite to the feeding direction of the molding material M ₂ so as to separate from the molding material M 3 (see FIG. 2 c). This backward movement is performed in accordance with the return swing of the bending device 13, and the distance between the guide device 12 and the bending device 13 can be increased by this movement, so that the axis of the molding material _M2 is It is possible to avoid applying unreasonable bending loads. While the bending device 13 is bending the axis of the molding material M ₂ with a large curvature R ₂ , the guide device 12 moves forward to its original position by reactivating the drive cylinder 18 and continues to bend the molding material M ₂ . It is slidably supported so that it can be sent out in a straight line (see Figure 2 d).

In addition, in the embodiment described above, the bending device 13
Although the explanation has been given for the case where the material is swung from side to side, it can also be applied to a bending device that moves and deflects the object in a straight line in the left and right direction (see Figure 3a). It can also be applied to a device in which deflection is caused by swinging around one roll axis (see Fig. 3b).

Effects of the Invention As described above, according to the continuous elongated member bending method and mounting method according to the present invention, the elongated member can be bent with extreme precision and efficiency without causing bending in the axis of the elongated member. It becomes possible to perform continuous axial bending.

[Brief explanation of drawings]

FIG. 1 is a side view showing an apparatus for bending a continuous long member according to the present invention, FIGS. 2 a to d are explanatory diagrams of the operation of the apparatus, and FIGS. 3 a and b are apparatuses according to another embodiment. FIG. 4 is a partial perspective view showing an example of a long member bent along its axis; FIGS. 5a and 5b are side views and plan views of a conventional bending device;
Figures a to c are explanatory views of the operation of the same apparatus, and Fig. 7 is an explanatory view showing the adverse effects of a long member bent by the same apparatus. 12: Guide device, 13: Bending device, 1
8: Drive cylinder for recoil movement of the guide device.

Claims (1)

[Scope of Claims] 1. A continuous elongated member such as a molding material formed into an irregular cross-sectional shape is supported in the axial direction and fed out in a straight line, and the axis of the elongated member is bisected behind the support point. When bending the elongated member with different curvatures continuously in the dimensional or three-dimensional direction, the axis of the elongated member is sent out from the curvature bending position and when returning to the straight position, the support point of the elongated member is moved to the elongated member. A method for axially bending a continuous elongated member, characterized in that the members are separated in the opposite direction. 2. A guide device that supports a continuous elongated member such as a molding material molded with an irregular cross-sectional shape so as to be slidable in the axial direction and sends it out linearly;
a bending device that continuously bends the axis of the elongated member by curvature by deflecting in two or three dimensions with respect to the feeding direction of the elongated member behind the guide device; An axial bending device for continuous elongated members, characterized in that a guide device is arranged so as to be slidable and retractable in conjunction with the return movement of the processing device from a deflected position to a linear position where the elongated member is sent out. .