JP2016209930A - Finish section of square pipe manufacturing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous manufacturing machine for a square pipe comprising a finish station having the arrangement of rollers for avoiding any slip, slide, or undulation of a molded square pipe.SOLUTION: At least one of finish stations 11a,11b,11c, and 11d suitable to make the upper ends of a curved strip sheet 1 coming out of a molding section closer to each other comprises one lower roller 20 having a nearly horizontal axis which functions as the support of a molded square pipe, two side face rollers 21 installed to be horizontally movable and located on both sides of the molded square pipe, and two upper rollers 22 installed to be vertically movable and located above the molded square pipe, where horizontal movement and vertical movement are performed to adjust the positions of the side face rollers and the upper rollers according to the size of the pipe to be manufactured, so that the side face rollers and the upper rollers have variable inclination.SELECTED DRAWING: Figure 2

Description

Detailed Description of the Invention

[Introduction]
The subject of the present invention is the finishing section of a machine that continuously produces square pipes (pipes having a square or rectangular cross section).

  A machine that continuously forms square pipes, considering the final welding, a plurality of forming stations that gradually bend the band-shaped metal sheet and the ends of the band-shaped metal sheet bent by the forming station. And a finishing section following the forming station with at least one station being brought closer together, and at least one station for finally welding the square pipe.

  Machines for forming square pipes by continuously bending a strip of metal sheet are well known in the art. The machine is provided with a plurality of stations in succession that cause a belt-like metal sheet to be gradually deformed by a plurality of bonded roller pairs (having grooves with complementary cross sections).

  These known machines have the disadvantage that several pairs of rollers need to be exchanged when the size of the pipe to be manufactured has to be changed. For this reason, time for stopping the machine to change the length is generated, and the productivity of the production line is lowered.

  The demand for maximizing manufacturing flexibility as production batches shrink has led to demand for pipe making machines with very short size change times.

  Such machines have several features that distinguish them from other machines. In particular, there is no need to change tools when switching from one size to another in the same machine manufacturing range.

  Such a machine is defined as a machine having a variable linear shape, for example, OLIMPIA 80 S., which is the same applicant as the applicant of the present invention. R. L. In European Patent Application No. 2279807. Such a machine can initially deform a flat sheet of metal and make the upper and lower ends of a square or rectangular cross section with adjustable rollers, thereby adapting to the various sizes of pipes to be manufactured, A variable number of so-called “pipe-forming” steps are provided. The adjustable roller presses the metal sheet from the outside and inside of the pipe cross section until the inside of the pipe being molded is fully opened. The pipe forming section is followed by a “pipe finishing” section where it can no longer operate with rollers in the cross section of the pipe and to give the pipe the final shape before welding A roller operating from the outside is provided.

  According to the European patent, the finishing section comprises a plurality of stations. Each station has one lower roller located below the square pipe being molded, a pair of rollers having a vertical axis and adjustable in the horizontal direction, located on both sides of the square pipe being molded, A pair of rollers having a horizontal axis, spaced apart in the longitudinal direction, adjustable in the vertical direction, and positioned above the molded square pipe.

  In order to conform to the side shape of the square pipe being molded, the side roller with a vertical axis is a conical roller and is positioned to align with the lower roller.

  On the other hand, in order to adapt to the upper shape of the molded square pipe, the upper roller is a biconical roller and, as mentioned above, staggered in the longitudinal direction so as not to interfere with the conical side roller. ing.

〔wrap up〕
The inventor has found that the arrangement of rollers as described above at the station of the finishing section has led to the problem that the present invention seeks to solve.

  In fact, the conical side roller has a large dimension relative to the corresponding cylindrical roller, thereby increasing the lateral dimension of the machine.

  Due to the presence of the cone-shaped side rollers positioned to align with the lower roller, the bi-conical upper roller staggered in the longitudinal direction causes the torque of the molded pipe, which is misaligned and incompletely finished It will cause pipe ups and downs.

  The object of the present invention is to eliminate the above drawbacks.

  More specifically, the object of the present invention is the continuous production of a square pipe with at least one finishing station, for example with a roller arrangement to avoid any deviation, twisting or undulation of the molded square pipe. Is to provide a finishing section of the machine.

  Another object of the present invention is, for example, to provide a roller arrangement and shape to make the corresponding finishing station compact.

  The above and other objects are achieved by a finishing section according to the invention having the features of the attached independent claim 1.

  Advantageous embodiments of the invention are disclosed by the dependent claims.

In effect, each station of the finishing section according to the invention is
One lower roller that serves as a support for the molded pipe;
Two side rollers with adjustable slope that can be opened / closed laterally to adapt to the manufacturing range;
In order to adapt to the production range, it is equipped with two upper rollers with a variable inclination that can move up and down in the vertical direction.

  Conveniently, all rollers are cylindrical and limited in width, but all rollers may be slightly conical without departing from the scope of the present invention.

  The upper rollers are arranged to align with the lower rollers, and the side rollers are staggered longitudinally with respect to these rollers.

  The inclination of the side roller can be adjusted manually with a trapezoidal screw. Further, the horizontal opening / closing movement of the side roller is realized by a trapezoidal screw moved by a gear motor, and is controlled by an encoder (encoder) installed in the gear motor.

  Similarly, the tilt of the two upper rollers can be adjusted manually by means of trapezoidal screws, and the vertical movement of these rollers is achieved by a jack that is driven by a motor.

  Further features of the present invention will become more apparent from the following detailed description, which is illustrated in the accompanying drawings and refers to fully non-limiting examples of the present invention.

[Brief description of the drawings]
1A and 1B schematically illustrate the shape of a square pipe that has undergone a forming step (FIG. 1A) and a finishing step (FIG. 1B), respectively.

  2 (a) and 2 (b) are side and top views schematically showing the arrangement of the rollers in the finishing section according to the invention, consisting of four consecutive stations.

  FIG. 2 (c) is a perspective view of the finishing station of FIGS. 2 (a) and 2 (b) for manipulating a square pipe. The arrows in FIGS. 2A and 2B indicate the traveling direction of the pipe and the moving direction of each roller.

  3A to 3H are cross-sectional views cut along the planes AA to HH in FIG.

  4A, 4B and 4C are a perspective view, a top view and a side view, respectively, of a finishing section having four stations according to the present invention.

  5A and 5B are a perspective view and a front view, respectively, of a mechanism carrying the side rollers of the finishing section according to the present invention.

  6A and 6B are a perspective view and a front view, respectively, of a mechanism carrying the lower and upper rollers of the finishing section according to the present invention.

[Detailed description of various forms]
Accompanying FIGS. 1A and 1B schematically show the shape of a strip-shaped metal sheet designated as reference numeral 1, respectively, after passing through the forming section of a machine that continuously produces square pipes, and the finishing section, respectively. After passing through. In the following, reference numeral 1 also indicates a molded or molded square pipe.

  The present invention will be described with particular reference to the finishing section described below with reference to FIGS. 2-6, and no further description will be given for molding stations that are considered well known.

  A finishing section, generally designated as reference numeral 10, is schematically shown in FIGS. The finishing section comprises four finishing stations 11a, 11b, 11c and 11d continuously in the direction of travel of the metal sheet, and in the illustrated example, the pipe is formed from right to left.

  Of course, the number of finishing stations 11 may differ from the number shown, and theoretically it is possible to install only one finishing station.

  Each finishing station has a fixed lower roller 20 with a complete cylindrical or slightly convex cross section and a variable slope so that the bottom surface of the molded pipe does not become convex, Two side rollers 21 that can be moved horizontally open / closed to adapt to the width of the pipe to be produced, and have a variable inclination and are raised vertically to fit the dimensions of the pipe to be produced. / Two upper rollers 22 that can move down.

  With reference to FIG. 5 and FIG. 6 respectively, the movement of the paired side roller 21 and upper roller 22 will be described below.

  As can be seen from FIGS. 2 (a) to 2 (c), the two upper rollers 22 are aligned with the lower roller 20, that is, arranged on the vertical line of the lower roller 20, and the side rollers 21 are arranged on the lower roller 20. And the upper roller 22 are arranged at positions alternately in the longitudinal direction. In particular, the side roller 21 is arranged upstream of the lower roller 20 and the upper roller 22 in the traveling direction of the molded square pipe 1.

  As can be seen from FIGS. 2 (a)-(c) and further from FIGS. 3 (a)-(h), depending on the position of the corresponding station 11 in the finishing section 10, the side rollers 21 and The upper roller 22 has a different slope.

  More specifically, FIGS. 3A to 3H show the inclination angle α shown in the figure corresponding to the inclination of the side roller axis with respect to the vertical line from the first station 11a to the last station 11d. But in the example how it decreases from 20 ° to 6 ° and how the tilt angle of the axis of the upper roller 22 relative to the horizontal line decreases in the example from 23.5 ° to 4.5 ° Is shown.

  The roller 21 and the roller 22 are both cylindrical rollers. This allows the machine to be miniaturized, especially in the lateral direction.

  4A, 4B and 4C are general views, respectively, a perspective view, a top view and a side view of a finishing section having four stations according to the present invention.

  5 and 6 show the mechanism for carrying the side rollers 21 and the mechanism for carrying the upper roller 22 with the lower roller 20, respectively, allowing the movement of these rollers located in the first finishing station 11a. It shows the mechanism to do.

  More specifically, FIGS. 5A and 5B are a perspective view and a front view, respectively, of a mechanism 11 a ′ carrying the side roller 21.

  As can be seen from these drawings, the roller 21 can be slid in each arcuate guide 31 and the roller rotates around the rotation centers C1 and C2 corresponding to the lower end of the cross section of the molded pipe 1. In order to be able to do so, it is rotatably attached to each support body 30 having a circular cross section, and the lower end of the roller 21 is arranged so as to abut against the rotation center.

  In the example, the adjustment of the inclination of the side roller 21, i.e. the calibration of the side roller 21 according to the position occupied by each station in the finishing section, is performed manually by means of a trapezoidal screw, and the hexagonal head 32 of the trapezoidal screw. Is shown in FIGS. 5A and 5B.

  Of course, the adjustments described above may be performed using any other type of actuator, such as hydraulic or electrical, for example.

  FIG. 5 also shows a set screw 33 inserted in the corresponding groove 34 in order to secure the support 30 of the roller 21 to each guide 31 in the calibration position.

  The guide 31 is also provided with a stepped scale 35, and the scale 35 can accurately read the inclination angle of the roller 21.

  The arc-shaped guides 31 carrying the side rollers 21 are respectively installed on the slides 36 that slide on the respective guide blocks 37 attached to the base 40 of the finishing section.

  In the example, the movement of the slide 36, which determines the opening / closing of the side roller 21 for the roller 21 to adapt to the dimensions of the square pipe to be molded, is realized by a pair of trapezoidal screws 38 driven by a gear motor 39. Is done.

  Here, with reference to FIG. 6A and 6B, arrangement | positioning of the upper roller 22 is demonstrated.

  Similar to the side roller 21, the upper roller is carried by each support 50 having a circular cross section that slides in each arcuate guide 51. Thereby, in order to calibrate the upper roller based on the position of the corresponding station in the finishing section, the roller rotates around the center of rotation corresponding to the intersection of the extensions of the upper end of the molded pipe 1 To do.

  In the example, the movement of the roller 22 is effected by each trapezoidal screw 52. However, it will be appreciated that the movement of the roller 22 may be performed by any other type of actuator.

  The arcuate guide 51 is provided with a stepped scale 55 in order to accurately read the inclination angle of the corresponding upper roller 22.

  The arcuate guide 51 is installed on a vertical slide 56 that slides on an upright portion 57 attached to the base 40.

  In order to fit the roller 22 to the dimensions of the square pipe to be manufactured, the upper part of the slide 56 is joined by a horizontal member 58 which is driven vertically by a jack 59 which is moved by a motor 60.

  In FIGS. 6A and 6B, as described above, the lower roller 20 having a convex cross section is shown in order to avoid the bottom surface of the square pipe 1 becoming convex, which can occur when the side wall of the pipe is bent. .

  Obviously, the lower roller 20 may have a perfect cross section.

  The lower roller 20 is installed on the support unit 70 and can be finely adjusted vertically if necessary.

  All the rollers 20, 21, 22 of each finishing station are usually mounted in an idle state about their respective axes.

  Of course, the present invention is not limited to the specific embodiments described above and illustrated in the accompanying drawings. Numerous detailed changes may be made to the invention without departing from the scope of the invention as defined by the appended claims, as they do so.

The shape of the square pipe which passed through the formation step is shown schematically. 1B schematically illustrates the shape of the square pipe of FIG. 1B after a finishing step. (A) side view and (b) top view schematically showing the arrangement of the rollers in the finishing section according to the invention, consisting of four consecutive stations, and (a) in FIG. It is (c) perspective view of the finishing station of (b). Arrows indicate the traveling direction of the pipe and the moving direction of each roller. It is sectional drawing cut | disconnected along the plane of AA-HH of (a) of FIG. FIG. 4 is a perspective view of a finishing section having four stations according to the present invention. FIG. 4B is a top view of the finishing section of FIG. 4A. FIG. 4B is a side view of the finishing section of FIG. 4A. It is a perspective view of the mechanism which carries the side roller of the finishing section which concerns on this invention. It is a front view of the mechanism which carries the side roller of FIG. 5A. It is a perspective view of the mechanism which carries the lower roller and upper roller of the finishing section which concern on this invention. It is a front view of the mechanism which carries the lower roller and upper roller of Drawing 6B.

Claims (10)

A finishing section (10) of a machine for continuously producing square pipes,
The finishing section (10) is arranged downstream of a forming section suitable for progressively bending the belt-like sheet (1) and upstream of a section for welding the formed square pipe. ,
The finishing section (10) comprises at least one finishing station (11a, 11b, 11c, 11d) suitable for bringing the upper ends of the bent strips coming out of the forming section closer together.
The at least one finishing station is
One lower roller (20) having a substantially horizontal axis, which functions as a support for the molded square pipe;
Two side rollers (21) positioned horizontally on both sides of the square pipe, which is horizontally movable, i.e., is movably installed in a direction parallel to the reference plane of the belt-like sheet (1);
Two upper rollers (22) which are vertically movable, that is, movably installed in a direction perpendicular to the reference plane of the belt-like sheet (1) and located above the formed square pipe. ,
The horizontal movement and the vertical movement are performed to adjust the position of the side roller (21) and the upper roller (22) according to the size of the pipe to be manufactured,
Finishing section, characterized in that the side roller (21) and the upper roller (22) have an adjustable slope. The upper roller (22) having an adjustable slope of the at least one finishing station (11) is aligned with the lower roller (20), ie arranged on a vertical line of the lower roller (20). ,
The said side rollers (21) are staggered in the longitudinal direction relative to the rollers (20, 22) in the direction of travel of the molded square pipe. Finishing section.   Finishing section according to claim 2, characterized in that the side roller (21) is arranged upstream of the upper roller (22). The side roller (21) is installed on each support (30) that slides on the corresponding arcuate guide (31),
Thereby, the side roller (21) rotates around the rotation center (C1, C2) corresponding to the lower end of the section of the molded square pipe (1) where the lower end of the roller (21) is arranged. 4. Finishing section according to any one of the preceding claims, characterized in that it is made possible.   The side roller (21) with associated support (30) and arcuate guide (31) slides symmetrically horizontally on a guide block (37) attached to the base (40) of the finishing section. Finishing section according to claim 4, characterized in that it is mounted on each slide (36). The upper roller (22) is installed on each support (50) that slides in each arcuate guide (51),
Thereby, the upper roller (22) can be rotated around the center of rotation (C) corresponding to the intersection of the extension of the upper end of the section of the square pipe (1) being molded. 6. Finishing section according to any one of the preceding claims, characterized in that it is characterized in that   The upper roller (22) with the associated support (50) and arcuate guide (51) is a slide that slides vertically on an upright (57) attached to the pedestal of the finishing section ( 56. Finishing section according to claim 6, characterized in that it is mounted on 56).   Finishing section according to claim 7, characterized in that the upper part of the vertical slide (56) is joined by a horizontal member (58) driven by a jack (59) using a motor (60). . The movement for adjusting the inclination of the side roller (21) and the upper roller (22) is performed by a trapezoidal screw,
8. Finishing section according to at least one of claims 4 to 7, characterized in that the horizontal movement of the side roller (21) is also obtained by a trapezoidal screw. A machine for continuously forming square pipes,
A shaped section suitable for progressively bending the belt-like sheet (1), a finishing section (10) suitable for bringing the upper ends of the bent belt-like sheet closer together, and the shaped square pipe With the sections to be welded together,
The finishing section (10) is continuously formed into a square pipe, characterized in that it comprises at least one finishing station (11a, 11b, 11c, 11d) according to any one of claims 1 to 9. Machine to do.

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