JPH11151525A - Guide system in pipe roll forming - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inlet guide having extremely high versatility by controlling a relative position between a strip steel stock and a forming roll in pipe roll forming. SOLUTION: In the guide system, the position of a product to be formed and the position with respect to a forming roll for the strip steel stock which is fed following up a forming speed and adjusted by means of plural pairs of upper and lower horizontal guide rolls 3 for holding the strip steel stock in the upstream side of a roll forming machine from the upper and lower directions, a pair of upper and lower guide frames 4, 5 which encloses these and moreover supports the horizontal guide rolls 3, a position adjusting mechanism by an electromechanical mechanism and a hydraulic actuator which supports the guide frame 5 at the upper surface side or the lower surface side of the guide frame 4 and can independently change the vertical directional position, the horizontal directional position and the rotation angle around the vertical axis and the horizontal axis of the guide frames 4, 5, a position detecting device 8 which detects the position of the product to be formed provided in the middle or the downstream side of the roll forming machine and sends a detected signal to the electromechanical mechanism and the position adjusting mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entrance guide having extremely high versatility by controlling the relative position between a material strip and a forming roll in roll forming of a pipe.

[0002]

2. Description of the Related Art Many problems that occur in the roll forming of pipes are caused by misalignment of a relative positional relationship between a material strip and a forming roll that occurs in each stage of the roll forming.
For example, the rolling phenomenon of the raw steel strip during roll forming, the dimensional error of the product, the difference in the cross-sectional dimensions as viewed in the longitudinal direction of the steel strip, and the like are numerous examples. Conventionally, as a method for addressing these problems, a roll or shoe called a guide is usually used as a device for adjusting the relative position between the material strip and the forming roll.

[0003]

However, at present, the rolls or shoes referred to as the guides described above are extremely poor in functionality and practically hardly useful. In particular, as a means for restricting the relative position of the raw steel strip in the width direction, the use of a vertical roll or shoe as a guide on the edge end face of the raw steel strip has been widely performed, but it has hardly functioned. That is, if the steel strip is to be constrained with necessary and sufficient accuracy, the edge of the raw steel strip comes into strong contact with the guide, causing a phenomenon of crushing or breaking. On the other hand, if the gap (gap) between the guide and the steel strip is increased to correct this problem, the function as a guide cannot be fulfilled at all.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and a guide system for roll forming a pipe according to the present invention is an extremely versatile entrance guide, and one or more sets of entrance guides are provided. A flat roll is used to hold the raw steel strip from the top and bottom surfaces, store them together in a support frame, and control the relative position between the raw steel strip and the forming roll by changing the position of the support frame. It is. That is, the present invention surrounds a pair of upper and lower horizontal guide rolls and a plurality of pairs of upper and lower horizontal guide rolls for sandwiching the material strip on the upstream side of the roll forming machine from above and below, And, a pair of upper and lower guide frames supporting the horizontal guide rolls, supporting the guide frame on the upper or lower side of the guide frame,
A vertical position of the guide frame, a horizontal position, a position adjustment mechanism by an electromechanical mechanism or a hydraulic actuator capable of independently changing a rotation angle around a vertical axis / horizontal axis, and an intermediate position between the roll forming machine or A belt for detecting the position of the molded article provided on the downstream side and sending a detection signal to the electromechanical mechanism and the position adjusting mechanism to feed the article following the position and molding speed of the molded article; A guide system in pipe roll forming, wherein the position of the steel material with respect to the forming roll is adjusted,
It is.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a guide system in roll forming of a pipe according to the present invention. FIG.
, The guide system 2 according to the present invention is arranged immediately before the roll forming machine group 1 for forming the pipe P. The guide system 2 includes a steel strip S as a material of the pipe P.
A pair of upper and lower guide rolls 3 of one or more stages, which can be adjusted to the forming center position of the roll forming machine group 1 with from above and below, are arranged in tandem in the running direction of the steel strip S. A pair of upper and lower guide frames 4 and 5 for surrounding and supporting the guide roll group 3 are provided at such an interval that they do not come into contact with the traveling steel strip S. Further, the uppermost surface of the guide frame 4 and the guide frame 5 The position adjustment control devices 6 and 7 for the guide frame 4 and the guide frame 5 are provided on the lowermost surface of the device via connection fittings 15 and 16, respectively. These position adjustment control devices 6 and 7 are position adjustment means such as an electromechanical mechanism or a hydraulic actuator, respectively, and are position detection devices 8 for detecting the position of a pipe P provided in the middle or downstream of the roll forming machine group 1. The detected position signal is temporarily processed by a computer (C: CPU), and the positions of the guide frames 4 and 5 are adjusted in the vertical direction based on an appropriate adjustment signal. The position adjusting device 6 described above,
7 is to adjust the position by the electromechanical mechanism or the hydraulic actuator, etc. independently and arbitrarily change the vertical position, the horizontal position, and the rotation angles around the vertical axis and the horizontal axis of the guide frames 4 and 5 described above. Is configured to be possible. That is, the position adjustment of the guide frames 4 and 5 means that the positions of the upper and lower guide rolls 3 supported by the guide frames 4 and 5 are adjusted. By adopting such a configuration, the position of the pipe P being formed by the roll forming machine group 1 is constantly detected by the position detecting device 8, so that the roll forming machine follows the position and the forming speed. Group 1
The optimum position of the steel strip S fed to the steel sheet can be constantly grasped and adjusted.

FIG. 2 is a schematic front view of a guide system in the roll forming of a pipe according to the present invention. Guide roll group 3 built in guide frames 4 and 5
Are supported at one end by rotary drive shafts 9 and 10, and the ends of the drive motors 1 and 2 are connected via chocks 11 and 12, respectively.
3 is connected. In addition, a load applying mechanism and a load cell 14 are arranged to apply a load such that the guide roll group 3 can clamp the traveling steel strip S with an arbitrary force. Therefore, since the rotation speed of the guide roll group 3 is adjusted to the rotation speed of the drive motor 13 in accordance with the forming speed in the roll forming machine group 1, both running and clamping of the running steel strip S can be performed simultaneously. Becomes

FIGS. 3a and 3b show schematic front views of another embodiment of the guide system in the roll forming of a pipe according to the present invention. In FIG. 3, the position adjustment control device 7 is attached to only the lower guide frame 5 via the connection fitting 16 without attaching the position adjustment control device to the upper guide frame 4 shown in FIG. This is a system for adjusting the position of the strip S fed by swinging the guide frame 5.

FIG. 4 shows an example of a specific operation of the guide system in the roll forming of a pipe according to the present invention. FIGS. 4A and 4B show an example in which the position level of the strip S fed by the roll forming machine group 1 and the guide system 2 is correctly controlled. The molding operation is performed while the position level of S is kept horizontal, and this is a normal operation mode. FIG.
FIGS. 4C to 4F show the form in which the inflow direction of the steel strip material S is changed variously by following the special forming process in the forming operation.
e is an example in which the inflow angle in the vertical plane of the entire steel strip material S changes. In this case, one of the upper guide frame 4 and the upper guide frame 5 is positioned. The inflow angle can be changed by raising or lowering the adjustment control device 6 or 7 to form an inclined surface.

When it is desired to change the respective inflow angles of the left and right edges of the strip material S in the vertical plane as shown in FIGS. 4d and 4f, the upper guide frame 4 or the upper guide frame 4 is required. Position adjustment control device 6 or 7 attached to either one of the guide frames
This can be achieved by raising or lowering one of the width directions to form an inclined surface. Further, the guide system in the roll forming of the pipe according to the present invention can be applied to the left and right (width) thrust force acting on the strip material S surface, the torsional force acting around the longitudinal axis of the strip material S, and the like. Is enough to respond.

As described above, the guide system in the roll forming of a pipe according to the present invention has the following features. 1) By combining one or more sets of horizontal guide rolls, the steel strip material can be pressed from the upper and lower surfaces and the pressing force can be reduced. 2) The chocks supporting these horizontal guide rolls can be independently or interconnected and can be moved in a horizontal plane or a vertical plane as an integral guide. 3) A guide frame incorporating a horizontal guide roll. Can independently change the vertical position of both edges in the width direction (left and right) of the steel strip material. 4) The horizontal position of the left and right or front and rear of the chocks connected to the horizontal guide roll or the integrated guide system can be changed independently. 5) Furthermore, through the above movements, the axis of the horizontal guide roll can be changed
It is possible to incline simultaneously or individually from the horizontal position in the vertical plane and the running direction of the strip material in the horizontal plane. Needless to say, all these movements can be arbitrarily performed based on necessary numerical information by a servo mechanism or another method.

[0011]

As described above, the guide system in the roll forming of a pipe according to the present invention provides a guide system in which the inflow direction of the strip material sent to the forming roll in accordance with the forming conditions of the forming roll, that is, the entire strip steel material. It is possible to arbitrarily change the inflow angle in the vertical plane and the inflow angle in the vertical plane at each of the left and right (width) edges of the steel strip material, and to change the left and right (width) directions acting on the steel strip material surface. It is possible to flexibly cope with a thrust force and a torsional force acting around the longitudinal axis of the steel strip material. Therefore, the conventional problems can be solved all at once, and furthermore, the improvement of the yield and workability of the molding operation can be pursued to the utmost, and as a result, a great economical effect can be expected.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a guide system in roll forming of a pipe according to the present invention.

FIG. 2 is a schematic front view of a guide system in roll forming of a pipe according to the present invention.

FIG. 3a is a schematic side view of another embodiment of a guide system in roll forming of a pipe according to the present invention;
FIG. 3b is a schematic front view thereof.

4a to 4f show an example of a specific operation example of a guide system in roll forming of a pipe according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 roll forming machine group 2 guide system 3 guide roll 4 upper guide frame 5 lower guide frame 6 upper position adjusting device 7 lower position adjusting device 8 forming pipe position detecting device 9 10 guide Roll rotating shafts 11, 12 Roll chock 13 Drive motor 14 Loading mechanism, load cell 15, 16 Connection fitting P Pipe S Material steel C

Claims (1)

[Claims] 1. A plurality of pairs of upper and lower horizontal guide rolls for holding a steel strip from above and below on the upstream side of a roll forming machine, an upper horizontal guide roll group and a lower horizontal guide roll group, and A pair of upper and lower guide frames supporting the horizontal guide roll, and supporting the guide frame on the upper surface or lower surface side of the guide frame, and rotating the guide frame around a vertical position, a horizontal position, and a vertical axis / horizontal axis. An electromechanical mechanism capable of independently changing the angle or a position adjustment mechanism by a hydraulic actuator, and detects the position of a molded article provided on the middle or downstream side of the roll forming machine, and the electromechanical mechanism and With a position detecting device that sends a detection signal to the position adjusting mechanism, the forming roll of the steel strip material to be fed following the position and the forming speed of the molded article is formed. A guide system for pipe roll forming, wherein the position is adjusted.