JPH0140684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for bending a long metal material used for bending a generally quadrilateral vehicle window frame or the like.

BACKGROUND TECHNOLOGY Conventionally, when forming a window frame S for a vehicle whose cross section is approximately U-shaped and has an elongated metal material and whose overall shape is approximately quadrilateral and whose vertical sides are slightly curved (first, 2), using a bending device equipped with an axial bending die 1 and a chuck 2 on a rotary table 3, one shaft end of the metal material S' is held between the chuck 2 and the other end is held by the chuck 4. The metal material S' is clamped and pulled in the axial direction by the chuck 4 while rotating the rotary table 3 to press the metal material S' to the bending die 1, forming it into a substantially quadrilateral shape in the axial direction. The ends are cut to match and connected, and the vertical sides are curved (see Figures 3 and 4).

Problems to be Solved by the Invention When manufacturing window frames and the like in this manner, the step of bending the metal material into a substantially quadrilateral shape and the step of curving the vertical sides are performed in separate steps.
The reality is that productivity is extremely low because it takes a lot of man-hours and it also takes time and effort to change the material for each bending die.

SUMMARY OF THE INVENTION An object of the present invention is to provide a metal material bending device that can perform each bending process of bending the axis of the metal material into a substantially quadrilateral shape and forming the vertical sides into curves using the same device. shall be.

Means for Solving the Problems In the bending device for elongated metal materials according to the present invention, the shaft ends of elongated metal materials each having a substantially U-shaped cross section are held and pulled in a direction in which they approach each other. a movable chuck that rotates, an axial bending mold that presses the axis of the metal material along the circumferential surface having corners by the rotation of each movable chuck; A core metal that can move forward and backward into a U-shape of a metal material that is press-welded to the circumferential side of the bending mold, and a surface that is curved from the flat surface to a desired curvature by extending like a shelf from the circumferential side of the axial bending mold. It is constructed by comprising a bending die and a drive mechanism that moves the plane bending die tiltingly to press the curved surface of the plane bending die into pressure contact with the side surface of the metal material.

Function This bending device uses the rotation of each chuck to press the axis of the metal material against the axis bending die and bend the axis into a substantially U-shape. The curved surface of the surface bending mold is pressed against the side surface of the metal material which has recessed and is supported by the core metal and has a substantially U-shape, by the operation of the drive mechanism, and the core metal at other corners is pressed against the side surface of the metal material that has a substantially U-shape and is supported by the core metal. By invading into the U-shape and rotating each chuck to a close position to press the entire length of the axis along the circumferential side of the axis bending mold, the axial bending of the metal material and the side bending of the vertical side are the same. This can be done with this equipment.

Embodiment The following description will be made with reference to FIGS. 5 to 15.

This bending device uses a long metal material S' with a substantially U-shaped cross section to bend and form vehicle window frames, etc., which are generally quadrilateral and have slightly curved vertical sides. It is designed for the purpose of

The bending device includes a substantially quadrilateral axial bending die 11 rising from a bending die base 10. The axial bending die 11 has a circumferential surface that serves as a bending surface for bending the metal material S' in the axial direction, and one side is provided with a recess capable of receiving chucks 12 and 13, which will be described later. The chucks 12 are rotatable around the symmetrical fulcrums of the axial bending die 11, respectively.
13 are equipped. Each chuck 12, 13
are configured so as to be able to clamp each shaft end of the metal material S', and are attached so as to be rotatable in the mutually proximate direction while clamping and pulling the shaft ends of the metal material S'. Each of these chucks 12 and 13 clamps the open end side of the substantially U-shaped cross section of the metal material S' toward the axis bending die 11, and a core metal 14 is provided in the U-shape of the cross section. , 15, 16, 17 are drive cylinders 14a,
It is attached to each corner of the axial bending die 11 so as to be able to move forward and backward so as to be recessed by the actuation of the actuators 15a, 16a, and 17a. Further, a surface bending die 18 is provided on the outer periphery of the axis bending die 11 so as to protrude like a shelf.
The plane of this surface bending mold 18 becomes a bending surface for curve-forming the side surface of the metal material S', and the plane is formed into a curved surface according to a desired curvature. This curved surface acts on the side surface of the metal material S' by tilting the surface bending die 18, and one end side of the bending die base 10 that supports the surface bending die 18 is roughly referred to as the side surface of the axis bending die 11. Hinge mechanism 19 provided at the same position
A drive mechanism 21 such as a drive cylinder to which the base 20 is pivotally mounted and whose other end is mounted vertically
It can be tilted by connecting to.

In the bending device configured as described above, the left and right ends of the metal material S' are held between the chucks 12 and 13, and the axis of the metal material S' is bent into a substantially U-shape.
The core metals 14 and 15 are moved to protrude into the axis of the metal material S', and the metal material S' is supported by the indentation of each core metal 14 and 15, and then the drive mechanism 21 is activated to form the surface bending die 18. Hinge mechanism 19 by moving one end side upward.
The surface bending mold 18 is tilted using as a fulcrum. In this tilting motion, the curved surface of the surface bending die 18 comes into pressure contact with one side of the metal material S' held between the chucks 12 and 13, and the vertical sides of the window frame to be manufactured can be curved. . When the side bending is completed, the core bars 16 and 17 are recessed into the U-shaped cross section of the metal material S', and the chucks 12 and 13 are individually rotated until they reach the concave position of the axis bending die 11. Once moved, release the clamp. Each of these chucks 1
When 2 and 13 are released, the respective shaft ends of the metal material S' are vertically aligned and aligned in parallel, and the bending process is completed by supplementarily pressing each shaft end with the busher 22.

After this bending process, the core metals 14, 15, 16, 1
7 is moved back, the metal material S' is removed from the bending mold, and the ends are cut to match and then joined together to produce a window frame for a vehicle.

Effects of the Invention As described above, according to the metal material bending apparatus according to the present invention, since axial bending and surface bending can be performed in the same process, manufacturing efficiency is significantly improved, and the desired result can be achieved. Be able to perform bending work.

[Brief explanation of drawings]

Figure 1 is a perspective view of a vehicle window frame, etc. Figure 2 is a perspective view of a vehicle window frame, etc.
3 and 4 are explanatory diagrams of the configuration and operation of the bending device according to the conventional example, FIG. 5 is a plan view of the bending device according to the present invention, and FIG. Figure 7 is a cross-sectional view taken along the line B-B, Figure 7 is a cross-sectional view taken along line C-C in Figure 5, Figure 8 is a side view of the same device, and Figures 9-15 are
The figure is an explanatory diagram of the operation of the device. S': Metal material, 11: Axial bending type, 12,1
3: Chuck, 14, 15, 16, 17: Core metal,
18: Surface bending type, 21: Drive mechanism.

Claims (1)

[Claims] 1. A movable chuck that rotates in a direction approaching each other while holding and pulling the shaft end of a long metal material having a substantially U-shaped cross section, and a circumferential side surface having a corner due to the rotation of each movable chuck. An axial bending die that presses the axis of the metal material along the axis, and a receding movement that intrudes into the U-shape of the metal material that is placed at each corner of the axis bending die and press-welded to the circumferential side of the axis bending die. A flexible core metal, a surface bending mold whose plane is curved at a desired curvature by protruding from the peripheral side of the axial bending mold, and a metal material held by the axial bending mold by tilting the surface bending mold. 1. A bending device for a long metal material, comprising: a drive mechanism for press-contacting a curved surface of a surface bending mold to a side surface of the metal material.