JPS61159229A - Method and device for manufacturing bend work product for vehicle - Google Patents

Abstract

PURPOSE:To perform a bend and torsion work in accurate shape without any return nor deformation by applying a tension in the axial line direction with clamping the end part of a long-sized material and by performing bend work with twisting. CONSTITUTION:Both ends of a long-sized material 5 are clamped by a clamp 6. And when a cylinder rod 27 is retreated with operating the fluid pressure cylinder 7 in X direction, the clamp 6 is pulled in the X direction via torsion actuator 9 and the tension in the axial line direction is applied on the long-sized material 5. When the fluid pressure cylinder 11 in Z direction is operated, then the X direction fluid pressure cylinder 7 is moved in vertical direction along a Z direction slide guide 12 and the bending in Z direction is performed with the long-sized material 5 being pressed to a bending die 8. When Y direction fluid pressure cylinder 19 is operated, a horizontal arm 13 is rotated in the horizontal direction centering around a rotary shaft 15 and the bending in Y direction is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for manufacturing bent products for vehicles such as door sashes and moldings for vehicles.

[Conventional technology]

Among automobile door sashes and moldings,
Those that are bent to be installed diagonally from the top to the bottom of the car body are twisted to fit the curved surface of the car body, which has a nearly constant curvature.

It is necessary to add processing. FIG. 5 is a perspective view of the door sash. This is because the door sash upper 1 is installed diagonally from the second part to the bottom of the vehicle body.

The shape follows the outer periphery of a cylinder 2 with a radius of curvature R corresponding to the side surface of the vehicle body, and is formed by bending and twisting.

Figure 6 is a front view of the molding, Figure 7 is its side view, and Figures 8 (A), (B), and (C) are the 6
It is AA, BB, CC sectional views of a figure. Since the molding 3 is attached obliquely to the vehicle body 4 with a radius of curvature R, its attachment angle is α' in (A) with respect to the horizontal direction.
The shape is o'' in (B) and β0 in (c), and is formed by bending and twisting.

FIG. 9 is a plan view showing the conventional bending method disclosed in, for example, JP-A-56-144385, and FIG. 10 is the D-
It is a D sectional view. The conventional manufacturing method for bent products is
As shown in the figure, both ends of a long material 5, such as a metal plate formed into a predetermined cross-sectional shape by roll forming or an extruded material made by extruding a synthetic resin, are clamped by clamps 6 at the chain line position, While applying tension in the axial direction (X direction) with the X direction fluid pressure cylinder 7, press the clamp 6 against the bending die 8 in the horizontal direction (as shown by the solid line)
(Y direction) to perform bending in the Y direction, further move in the vertical direction to perform bending in two directions, and then separately perform twisting.

[Problem that the invention seeks to solve]

However, in such conventional manufacturing methods for bent products for vehicles, twisting is added after bending, which complicates the process and equipment, resulting in high costs. There were problems such as the cross-sectional shape may change, requiring correction.

The present invention was made in view of these conventional problems, and aims to solve the above problems by performing bending while applying twist.

Measures to solve problem C] This invention includes the following two inventions.

7 rumph.

(1) Manufacture of a bent product for a vehicle, which is characterized in that the ends of the long material are shuffed and bent while applying tension in the axial direction, and the long material is bent while being twisted. Method.

a torsion actuator that applies tension to the clamp 7''; a fluid pressure cylinder that applies tension in the axial direction of the elongated material to the nya-y-4; A manufacturing device for a bent product for a vehicle, comprising: another fluid pressure cylinder that moves the fluid pressure cylinder.

[For production]

In the method of manufacturing a bent product for vehicles of the present invention, the ends of a long material such as a deformed material or an extruded material are clamped, tension is applied in the axial direction, the material is pressed against a bending mold, and the material is bent while applying twist. Perform processing.

The twisting process can be changed while detecting the degree of bending process, and is performed by adding twisting or untwisting depending on the degree of bending process.

Furthermore, in the apparatus for manufacturing bent products for vehicles according to the second invention, the ends of the long material are clamped using the clamps, and the fluid pressure cylinder that applies tension is operated to apply tension in the axial direction of the long material. Then, another fluid pressure cylinder is operated to press the long material against the bending mold, and the fluid pressure cylinder is moved to perform the bending process. At this time, the torsion actuator is operated depending on the degree of bending process. Then, perform the bending process while applying twist to the clamp.

〔Example〕

Hereinafter, the present invention will be explained with reference to embodiments of the drawings.

FIG. 1 is a plan view showing the right half of an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a plan view of the torsion actuator, FIG. The same reference numerals as in FIGS. 9 and 10 indicate the same or corresponding parts.

A torsion actuator 9 is provided between the clamp 6 and the X-direction fluid pressure cylinder 7. , the X-direction fluid pressure cylinder 7 is movable in the vertical direction (Z direction) along a Z-direction slide guide 12 by a Z-direction fluid pressure cylinder 11 fixed to a vertical arm 10.

The vertical arm 10 is attached to the horizontal arm 13 so as to be adjustable in the X direction. 14 is the X direction fluid pressure cylinder 7
This is a fluid pressure cylinder for forced rotation in the direction.

The horizontal arm 13 is attached to the apparatus main body 16 via a rotation shaft 15 so as to be rotatable in the horizontal direction (Y direction). Further, the tip of a cylinder rod 20 of a helical direction fluid pressure cylinder 19 is connected to a fulcrum 18 of a bracket 17 provided on the horizontal arm 13. A mold mounting table 21 is mounted above the apparatus main body 16 so as to be rotatable up and down at a fulcrum 22, and the bending mold 8 is mounted on a mold base 23 mounted on the upper part of the mold mounting table 21.

In FIGS. 3 and 4, the clamp 6 has a clamp frame 24 and a clamping fluid pressure cylinder 25, and a jaw for grasping the long material 5 is installed in the clamp frame 24, but is not shown. ing.

The torsion actuator 9 includes a base 28 fixed to the X-direction slide guide 26 and cylinder rod 27 of the X-direction fluid pressure cylinder 7, a hydraulic low reactuator 29 attached to this base 28, and a flange of this low clear actuator 29. 30, a first connector 33 attached to the casing 31 via a bearing 32, and a key 35 that engages the drive shaft 34 of the row reactor 29 and the first connector 33.
, a collar 36 screwed to the first connector 33, a second connector 38 attached to the tip of the first connector 33 so as to be rotatable in the vertical direction via a rotating shaft 37, and this second connector 38.
A disc 3 formed at the tip of the disc 3 and fixed to the clamp frame 24
9, and a torsional rotation position detection device 40 provided between the casing 31 and the first connector 33.

Yly Y2+ l/:i is a limit switch that detects the moving position of the horizontal arm 13, and based on these detection signals, hydraulic oil is supplied to the rotary actuator 29 in order to perform twisting according to the position of the horizontal arm 13. , the drive shaft 34 is configured to rotate by a predetermined amount.

Each of the above elements is arranged symmetrically about the center line F in FIGS. 1 and 2, but the left half is omitted.

In the method for manufacturing a bent product with the above configuration, first, both ends of the elongated material 5 are clamped with clamps 6 as in the conventional method. When the X-direction fluid pressure cylinder 7 is operated to move the cylinder rod 27 backward, the clamp 6 is pulled in the X-direction via the torsion actuator 9, and tension is applied to the long material 5 in the axial direction (X-direction). .

The long material 5 is moved in the vertical direction (Z direction) along the guide 12, and is pressed against the bending die 8 to perform bending in the Z direction. Furthermore, when the Y-direction fluid pressure cylinder 19 is actuated, the horizontal arm 13 moves in the horizontal direction (
(Y direction), and bending in the Y direction is performed. The bending processes in these two directions and the Y direction may be performed separately, or may be performed simultaneously according to a preset program.

The twisting process is performed when the bending process in the Y direction or the Z direction reaches a predetermined degree, and in this embodiment, the horizontal arm 13 is connected to the limit switches Y1+Y2.
When +y3... is reached, the torsion actuator 9 performs a predetermined twisting process. That is, when Yl is reached, a predetermined amount of hydraulic oil is supplied to the rotary actuator 29 according to the signal from the limit switch Y, and the drive shaft 34 rotates by a predetermined amount, and accordingly, the first connector 33 and the second The connector 38 and the disk 39 rotate to apply twist to the clamp 6, thereby performing the twisting process. The twist angle is detected and controlled by a twist position detection device 40.

With the clamp 6 twisted like this.

Furthermore, the hydraulic cylinders 11.19 are moved to perform the bending process. and the position to change the twist angle.

In other words, horizontal arm 1 is connected to limit switch Y2+ y3.
3 is reached, these signals actuate the rotary actuator 29 to add or untwist. In this way, bending is performed with necessary twist at a predetermined position, and a bent product having a predetermined shape is manufactured.

In the second process, twisting is performed when bending, so twisting and bending can be performed in one process without the need for a separate twisting process, reducing manufacturing costs and reducing the bending process by bending. Since twisting is performed while maintaining the shape accurately, there is no return or deformation, and bending and twisting can be performed into a predetermined shape, eliminating the need for correction.

In the above description, the torsional actuators 9 are limited to those shown in FIGS. 3 and 4.
The mounting position of 19 is also not limited to what is shown in the drawings, and can be changed. Furthermore, although a limit switch was used to detect the degree of bending, other means may be used, and the detection direction is not limited to the Y direction but may also be in the Z direction.

The present invention is applicable to manufacturing door sashes, moldings, and other bent products for vehicles.

〔Effect of the invention〕

According to this invention, since the bending process is performed while applying a twist, the bending process and the twist process can be performed using a device with a simple structure and a simple process, and the manufacturing cost is reduced by 1. In addition, there are advantages such as being able to process accurate shapes and eliminating the need for correction.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a part of the embodiment, Fig. 2 is a front view thereof, Fig. 3 is a plan view of the torsion actuator, Fig. 4 is a sectional view taken along line E-E, and Fig. 5 is a perspective view of the door sash. Figure 6 is a front view of the molding, Figure 7 is a side view thereof,
Figures 8 (A), (I3), and (C) are sectional views taken along lines AA, BB, and (-C) in Figure 6, respectively; Figure 9 is a plan view showing the conventional bending method; Figure 10 is a sectional view taken along line DD. In each figure, the same reference numerals indicate the same or corresponding parts, 5 is a long material, 6 is a clamp, 7 is an X-direction fluid pressure cylinder, 8 is a bending die, 9 11 is a torsion actuator, 11 is a two-way fluid pressure cylinder, 19 is a Y-direction fluid pressure cylinder, and 29 is a row actuator. Agent: Patent attorney Nariku Yanagihara ■) Taste ゛

Claims (6)

[Claims] (1) A method for manufacturing a bent product for a vehicle, characterized in that the end portion of the long material is clamped and the end of the long material is bent while applying tension in the axial direction, and the long material is bent while being twisted. . (2) Claim 1, wherein the twisting process applied to the long material is twisting or untwisting depending on the degree of bending process.
Manufacturing method described in section. (3) The manufacturing method according to claim 1 or 2, wherein the degree of twisting applied to the elongated material is detected and changed. (4) A clamp that clamps the end of the long material, a torsion actuator that applies twist to the clamp around the axis of the long material, and a fluid pressure cylinder that applies tension to the clamp in the axial direction of the long material. and another fluid pressure cylinder that moves the fluid pressure cylinder so as to press the elongated material against a bending die while applying tension. (5) The manufacturing apparatus according to claim 4, wherein the fluid pressure cylinder that applies tension is connected to the clamp via a torsion actuator. (6) The manufacturing apparatus according to claim 4 or 5, wherein the other hydraulic cylinders are a hydraulic cylinder that moves horizontally and a hydraulic cylinder that moves vertically.