JPH0367449B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a roll adjusting device for a roll forming machine that bends an L-shaped member having two substantially perpendicular surfaces in the X direction and the Y direction along the two surfaces.

Conventional technology Conventionally, a roll forming machine that continuously cold bends a strip material bends a plurality of sets of fixed rolls and an adjustment roll disposed between them at a radius slightly smaller than the desired radius of curvature of the product. The strips are bent by passing them between the rollers of each set of rolls, and the strips are cut into desired dimensions to produce products. The radius of curvature of the product is then precisely measured, and based on the measurement results, the position of the manual adjustment roll is changed as necessary to adjust the radius of curvature.

Normally, once the position of the adjustment roll is set,
As long as the shape and hardness of the strip do not change, the dimensional accuracy of the radius of curvature of the product will be within the specified range and there will be no problem. There was a problem in that dimensional accuracy could not be maintained due to changes in shape and hardness. For example, if the strip is hot-rolled steel, it is inevitable that the thickness will vary by about 1%, but the curvature dimension of the product (represented by the chord and arc dimensions of a product of a certain length) will vary by 6%. Since the above-mentioned conditions are reached, the above-mentioned method of adjusting the roll position cannot cope with the problem, resulting in a problem of poor product yield.

Furthermore, in the case of a roll adjustment device for a roll forming machine that performs bending in the X direction and Y direction along two surfaces of an L-shaped material having two substantially orthogonal surfaces, In addition to the above-mentioned problems, there was also the problem that twisting occurred due to the difference in curvature between the X direction and the Y direction.

Purpose In view of the above points, the present invention provides a bent L
The curvature in the X and Y directions and the torsion in the longitudinal direction of the shape are measured, and based on the measurement results, the X-direction adjustment device, Y-direction adjustment device, and torsion correction device are controlled to control the bending of the L-shape. An object of the present invention is to provide a roll adjustment device for a roll forming machine that can improve curvature dimensional accuracy.

Summary According to the present invention, in a roll forming machine that bends an L-shaped material having two substantially perpendicular surfaces in the X direction and the Y direction, at least three sets of fixed a roll, and an X-direction adjustment mechanism and a Y-direction adjustment mechanism that are movable in the X direction and the Y direction, respectively, disposed between each set of the fixed rolls;
A torsion correction mechanism disposed behind the last fixed roll, the curvature in the X direction and Y direction of the L-shaped member which is disposed behind the torsion correction mechanism and has been bent, and the curvature of the L-shaped member. A measuring means for measuring torsion in the longitudinal direction, and a calculation for comparing the measured value obtained by the measuring means with a standard value, and controlling the X-direction adjustment mechanism, Y-direction adjustment mechanism, and torsion correction mechanism based on the calculation result. This is achieved by a roll adjustment device of a roll forming machine, characterized in that it is provided with control means.

Embodiment The present invention will be described below based on an embodiment shown in the drawings. In FIG. A driving roll 5 is driven to send the L-shaped material 2, three sets of fixed rolls 5 are used to guide the L-shaped material 1 sent by the driving roll 3, and 6 is a first and second fixed roll 5. The X-direction adjustment mechanism is disposed between the rollers 6b, 6c, and 6d and is configured as shown in FIG. 2 when viewed in the direction of the arrow.
The L-shaped member 2 is held between the rollers 6c and 6d, and the rotation is adjusted around the pin 6f by the stepping motor 6e, so that the curvature of the surface of the L-shaped member 2 in the X direction can be changed by the rolls 6c and 6d. It's summery. 7 is disposed between the second and third fixed rolls 5, and when viewed in the direction of the arrow, it is symmetrical with respect to the L-shaped member 2 with respect to the traveling direction of the L-shaped member 2 as shown in FIG. The Y-direction adjusting mechanism is configured such that the rotation is adjusted by the stepping motor 7e, and thus the Y-direction is perpendicular to the X direction of the L-shaped member 2.
The curvature of the surface in the direction can be changed.
Reference numeral 8 denotes a torsion correction mechanism disposed behind the third fixed roll 5 and configured as shown in FIG. 3 when viewed in the direction of the arrow, and a frame whose rotation is adjusted by a stepping motor 8a. Rolls 8c and 8d pivotally supported by 8b are designed to hold the L-shaped member 2 between them. Reference numeral 9 denotes a measuring means disposed behind the torsion correction mechanism 8 and configured as shown in FIG. The sensor 9c measures the curvature of the L-shaped member 2 in the X and Y directions by contacting each surface of the L-shaped member 2, and the sensor 9c measures the curvature of the L-shaped member 2 by contacting one side of the roller 9d that holds the L-shaped member 2. It is designed to measure the torsion of the profile 2, and each sensor 9a, 9b, 9
The measured value of c is determined by the stepping motor 6e of the X-direction adjustment mechanism 6, the stepping motor 7e of the Y-direction adjustment mechanism 7, and the twist correction mechanism 8 by the connected calculation unit 10, control amount adjustment unit 11, and drive circuit unit 12, respectively. The stepping motors 8a are each controlled and driven. 13 is a cutter disposed behind the twist correction mechanism 9.

Since the embodiment of the present invention is configured as described above, the L-shaped member 2 is introduced as shown by the arrow A, is further sent by the drive roll 3, and is moved to the fixed roll 5, the X-direction adjustment mechanism 6, the fixed roll 5, and the Y-direction. It passes through the adjustment mechanism 7, fixed roll 5, twist correction mechanism 8, and measuring means 9, reaches the cutter 13, and is cut into a predetermined length by the cutter 13. At this time, the L-shaped member 2 is
The L-shaped material is bent (given curvature) in the X direction by the direction adjustment mechanism 6 and in the Y direction by the Y direction adjustment mechanism 7, and its thread is corrected by the twist correction mechanism 8. 2, the curvature in the X direction and the Y direction and the torsion in the longitudinal direction are measured by the measuring means 9, and the measured values are sent to each stepping motor 6e, 7e and 8a are controlled in a feedback manner, and thus the bending process of the L-shaped member 2 is precisely adjusted to a preset value, so that fluctuations and twists in the curvature of each plane, that is, the X direction and the Y direction, are reduced.

Effects of the Invention As described above, according to the present invention, bending of an L-shaped member with less variation in the curvature of each surface and less twisting can be performed with higher precision, which is extremely effective.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a roll forming machine equipped with a roll adjustment device according to the present invention, FIG. 2 is a view showing the X-direction adjustment mechanism as seen in the line direction of FIG. FIG. 1 shows the torsion correcting mechanism as seen in the line direction, and FIG. 4 shows the measuring means as seen in the line direction of FIG. DESCRIPTION OF SYMBOLS 1... Roll forming machine, 2... L-shaped material, 3... Drive roll, 4... Drive motor, 5... Fixed roll, 6... X direction adjustment mechanism, 7... Y direction adjustment mechanism, 8... ...Twisting correction mechanism, 9...Measuring means, 1
0...Calculation unit, 11...Controlled amount adjustment unit, 12...
Drive circuit section, 13... cutter.

Claims (1)

[Scope of Claims] 1. A roll forming machine that bends an L-shaped material having two substantially perpendicular surfaces in the X direction and the Y direction along the two surfaces, comprising: at least three sets of fixed rolls; An X-direction adjustment mechanism and a Y-direction adjustment mechanism that are movable in the X and Y directions are provided between each set of rolls, and a torsion correction mechanism is provided behind the last fixed roll. Measuring means for measuring the curvature in the X and Y directions and the torsion in the longitudinal direction of the bent L-shaped member, which is disposed at the rear of the mechanism, and measurements obtained by the measuring means A roll adjustment device for a roll forming machine, comprising a control means for comparing the value with a standard value and controlling the X-direction adjustment mechanism, Y-direction adjustment mechanism, and twist correction mechanism based on the calculation result. .