Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SHEET-METAL COILING MACHINE
Document Type and Number:
WIPO Patent Application WO/2016/193862
Kind Code:
A1
Abstract:
The object of the invention is a sheet-metal coiling machine equipped with a coiling system (1) and the brake system (2), wherein the coiling system (1) comprises a support frame (2), upon which a rotary shaft with a spool (4) is seated, powered with a motor in order to provide it with the torque (M), wherein the bands of sheet-metal (5) are wound onto a rotating drum with a spool (4) creating sheet-metal from coil (6), and a separator arm (8) is fixed to the supporting frame (3) by a rotary joint (7), the arm being equipped with separators (9), separating individual coiled bands of sheet-metal (5), while the brake system (2) comprises brake linings (10) exerting resistance pressure (P) on the wound bands of sheet-metal (5) so that together with the torque (M) of the rotating shaft with spool (4) they exert a pulling force (F) on the wound sheet-metal (5), characterized in that the braking system (2) has a lifting mechanism providing the regulated height (H) of the brake linings (10), wherein the height (H) of the brake linings (10) is regulated by means of a control system coupled with an angular sensor (12) disposed in the' joint (7) in such a way that the band winding angle (a) is kept at a constant level together with the increasing and/or decreasing the diameter of sheet-metal from coil (6).

Inventors:
LEJMAN STANISŁAW (PL)
Application Number:
PCT/IB2016/053057
Publication Date:
December 08, 2016
Filing Date:
May 25, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
PRZEDSIĘBIORSTWO CONCEPT STAL B&S LEJMAN SPÓŁKA (PL)
International Classes:
B21C47/00; B21B39/08; B21C47/34
Domestic Patent References:
WO2000027554A12000-05-18
Foreign References:
US20100025514A12010-02-04
US4173313A1979-11-06
DE3911400A11990-10-11
JPH07124644A1995-05-16
DE2759224B11979-04-05
Attorney, Agent or Firm:
WITEK, Andrzej (Śnieżko i Partnerzyul. Rudolfa Weigla 12, 53-114 Wrocław, PL)
Download PDF:
Claims:
Claims

1. A sheet-metal coiling machine equipped with a coiling system (1) and the brake system (2), wherein the coiling system (1) comprises a support frame (2), upon which a rotary shaft with a spool (4) is seated, powered with a motor in order to provide it with the torque (M) , wherein the bands of sheet-metal (5) are wound onto a rotating drum with a spool (4) creating sheet-metal from coil (6), and a separator arm (8) is fixed to the supporting frame (3) by a rotary joint (7) , the arm being equipped with separators (9), separating individual coiled bands of sheet- metal (5), while the brake system (2) comprises brake linings (10) exerting resistance pressure (P) on the wound bands of sheet-metal (5) so that together with the torque (M) of the rotating shaft with spool (4) they exert a pulling force (F) on the wound sheet-metal (5), characterized in that the braking system (2) has a lifting mechanism providing the regulated height (H) of the brake linings (10), wherein the height (H) of the brake linings (10) is regulated by means of a control system coupled with an angular sensor (12) disposed in the joint (7) in such a way that the band winding angle (a) is kept at a constant level together with the increasing and/or decreasing the diameter of sheet-metal from coil (6) .

2. A sheet-metal coiling machine according to claim 1, characterized in that the brake system (2) is equipped with brake guides (13) feeding the bands of sheet-metal (5) .

3. A sheet-metal coiling machine according to claim 1 or 2, characterized in that the rotating shaft with a spool (4) is powered with an electric motor connected to the control system.

4. A sheet-metal coiling machine according to any one of claims 1 through 3, characterized in that the lifting mechanism of the brake system (2) is powered with an electric motor connecto to the control system.

5. A sheet-metal coiling machine according to any one of claims 1 through 4, characterized in that the angular sensor (12) is an optical sensor.

Description:
Sheet-metal coiling machine

The object of the present invention is a sheet-metal recoiling machine equipped with a brake assembly, intended in particular to coil sheet-metal strips as one of elements in a line for processing sheet-metal unwound from a coil. lines for processing sheet-metal stripe from a coil, such as ines for laser cutting of flat details of sheet-metal, usually comprise a sheet-metal coiling machine is one of their elements, coiling the sheet-metal bands, e.g. slit steel, onto a drum. The application of a system to control of the coiled steel sheet pulling tension, which allows continuous and precise control of steel sheet coiling, is commonly known in the art. The application of such system limits the possibility of steel sheet damage and uncoiling of the wound coil. In such situation, a brake assembly is usually used, which provides a drag on the wound steel sheet by means of breaking shoes, which ensures providing appropriate pulling tension. However, during the process of sheet-metal coiling, the diameter of the wound sheet- metal coil changes, which results in the change of the angle at which the sheet-metal leaves the break. This in turn, assuming a constant torque, results in the change of the pulling force of the sheet-metal with increasing drum diameter. The pulling force changes because the sheet-metal diameter changes (increase of the radius vector length at steady force results in the increase of the torque) resulting in unevenly wound sheet-metal. The change of the sheet-metal angle at the exit from the break is very unfavorable for the whole process of production, because it results in changing pressing force which also results unevenly wound band and the so-called "band floating" Furthermore, inappropriate sheet-metal angle significantly accelerates the where of working elements of the used break.

From American patent documents No. US5485974A, equipment for sleeting the band into a number of bands of smaller width is known, wherein each of the slit bands of smaller width is wound on a separate coiling machine. The uncoiling machine from which the band is fed for spitting, as well as the coiling machines receiving the slit band, are seated on a special framework that enables independent regulation of spool height. The frames are equipped with actuators providing vertical displacement of each spool. Therefore, together with the increase of the coiling machine spool diameter and the decrease of the uncoiling machine spool diameter, the height of each device is regulated in such a way that a constant height of the unwound band movin through a fixed knife assembly is retained. In this solution, particularly in case of sheet-metal slitting, the applied actuators must be characterized by an appropriate power and your ability adjusted to the heavy weight of the wound sheet-metal. Furthermore, keeping the constant level of the sheet-metal requires using at least two independent actuators, which directly influences the increase of the number of component equipment in the line, thus increasing the total cost of the line and its operation.

US patent application No. US2827961A discloses a device for supporting, measuring, and cutting flat bands of material transported on rollers, in particular bands of rubber and leather. The device consists of a framework seated on wheels providing its mobility. The device is equipped with two dollars, the whining one in the unwinding one, situated on the opposite ends of the frame with a plurality of assisting assemblies between them, including a measuring system and a cutting system. The winding and the unwinding drums are mounted on a lifting structures providing regulation of their height. The lifting system is implemented by means of a worm shafts mounted on the bearings situated on two of the supporting member. A gear wheel is installed at the bottom of each shaft and connected by a chain with other gear wheels running under that frame. The lifting system were used in order to lift the spool from the substrate, with the band of material wound up on it to the working position, i.e. such position that enables free unwinding and cutting the material, cup the applied lifting system is operated manually, by means of an appropriate handle, transmitting the drive onto the gear wheels lifting the shafts of the schools. Considering the fact that the aim of the lifting system is to lift fools pools of material its application in sheet-metal unwinding system may be obstructed to the heavy weights of a full, unwound spool, significantly higher than the considered spools of rubber material or leather.

A similar lifting system was applied in a device presented in US3803959A, intended for slitting a band of material. The device is equipped with a frame, with lifting mechanisms on its opposite ends, for the unwinding and winding spool, the application of lifting mechanisms is aimed at lifting a full spool of material from the ground without lifting it manually. Lifting and lowering appropriate spools, the winding and unwinding one, is implemented by means of independent mechanisms with hydraulic drive, by starting scheduling actuators. Thus, the need for manual regulation of the height of the spools has been limited. Like in the above case, changing the heights of the unwound and wound band was implemented by means of lifting systems, which in case of systems for unwinding sheet-metal, characterized by significantly higher specific weight, may turn out obstructed and will be exposed to damage much more often. Furthermore, in order to establish the appropriate height of the unwound material in the form of bands, it is necessary to control both spools simultaneously, which additionally complicates the device control system. A technical challenge faced by the present invention is to propose such equipment for winding the bands that will be designed for winding sheet-metal unwound from a coil, will provide an appropriate pulling force of the wound sheet-metal increasing the winding parameters, will not cause damage to the wound material, being at the same time structurally simple and not requiring specialized components of high power and durability, and will provide less aware of working elements of the equipment, thus limiting the requirement for frequent maintenance and repairs. Furthermore, it is desired that the equipment for winding the band does not require performance of any manual operations, and the solution to the above problem be implemented in an automatic way. Unexpectedly, the said technical problems have been solved by the present invention. The object of the invention is a sheet-metal coiling machine equipped with a coiling system and the brake system, wherein the coiling system comprises a support frame, upon which a rotary shaft with a spool is seated, powered with a motor in order to provide it with the torque, wherein the bands of sheet-metal are wound on a rotating drum with a spool creating a sheet-metal from coil, and a separator arm is fixed to the supporting frame by a rotary joint, the arm being equipped with separators, separating individual coiled bands of sheet-metal, while the brake system comprises brake linings exerting resistance pressure P on the wound bands of sheet-metal so that together with the torque M of the rotating shaft with spool they exert a pulling force F on .the wound sheet-metal, characterized in that the braking system has a lifting mechanism providing the regulated height H of the brake linings, wherein the height of the brake linings H is regulated by means of a control system coupled with an angular sensor disposed in the joint in such a way that the band winding angle is kept at a constant level together with the increasing and/or decreasing the diameter of sheet-metal from coil. In a preferred embodiment of the present invention, the brake system is equipped with brake guide feeding the bands of sheet-metal. In another preferred embodiment of the present invention, the rotating shaft with a spool is powered with an electric motor connected to the control system. In another preferred embodiment of the present invention, the lifting mechanism of the brake system is powered with an electric motor coupled with the control system. Preferably, the angular sensor and optical sensor.

The sheet-metal coiling machine according to this invention has been equipped in a coiling system and the braking system, which allows to introduce the controlled pulling force of the bands being wound on the drum. The controlled pulling force of the wound bands of sheet-metal provides uniform winding of the sheet- metal and lack of crawling effect. The application of a lifting system allowing to change the height of the brake system, in particular the brake linings, and allows to adjust the height of the break to the change in the day I meet her off the sheet- metal from coil wound on the drum, thus keep a constant band winding angle a. Maintaining a constant angle a, on the one hand, makes the pressing force exerted by the separator arm on the sheet-metal bands maintain at a constant level, thus reducing the risk of damage of the sheet-metal being wound, and provides, on the other hand, uniform wear of brake linings, which extends its operation time. The signal from the angular sensor placed in the separate author arm joint provides feedback for the lifting mechanism of the break, which provides full automation of the whole system

Exemplary embodiments of the present invention have been presented in the drawing, where fig. 1 presents a schematic lateral view of the sheet-metal coiling machine with fully coiled sheet-metal, fig. 2 present a schematic lateral view of the sheet-metal coiling machine with incompletely coiled sheet- metal, fig. 3 presents a schematic lateral view of the brake system, fig. 4 presents a schematic top view of the brake system, while fig. 5 presents a schematic lateral front of the brake system.

Example Figures 1 and 2 illustrate a section of sheet-metal from coil processing line, comprising a sheet-metal winding machine according to the present invention. The sheet-metal coiling machine comprises substantially two main components, the winding system 1 and the brake system 2. The whining system 1 comprises a steel support frame 3 seated on the floor slab, upon which a rotating shaft with a spool 4 is mounted that the sheet-metal bands 5 are wound on. A separator arm 8, equipped with separators 9 on the end, is fixed to the supporting frame 3. The separator arm 8 has been mounted on a joint 7, which enables rotation of the separator arm 8, thus exerting pressure upon the coiled sheet-metal bands 5 and separation thereof. The second system being the component of the sheet-metal coiling machine constitutes a brake system 2. The brake system 2 has been based on a separate module of plate structure. The break base 11 that is anchored into the floor, has been equipped with a lifting mechanism, allowing to change the height H of the brake linings 10. The lifting mechanism is implemented by means of vertical guides 14 arranged in the corners, providing stiff guiding of the slider 16 that the main working elements of the brake move slidably, including the brake linings 10. The lifting mechanism of the brake system 2 is driven by means of an electric motor controlled from the control system (not illustrated) . Gear motor 17 causes rotation movement that is transferred by an intermediate shaft 19 to the bevel gear 18 that causes the movement of the brake linings 10 in the vertical axis by means of a ball-screw 15. Implementation of an electric motor with break and the gear system effectively blocks the possibility of spontaneous lowering the brake system 2 of the coiling machine. Additionally, the brake system 2 is equipped with brake guides 13 feeding the sheet-metal bands 5, reducing the risk of damage occurrence, such as bending, inaccurate guiding, etc.

This way the regulation of height capital age of the brake system 2 is implemented. The brake system 2 causes, by compressing brake linings 10, the creation of resistance force P on the coiled sheet-metal bands 5. On the other hand, the coiling system 1 was a rotating shaft with spool 4 is also powered with an electric motor, introduces torque upon the sheet-metal from coil 6. The torque M together with the resistance force P produce pulling for us F, exerted on the sheet-metal bands 5. It provides uniform coiling of the sheet-metal bands and lack of creeping effect. An optical angular sensor 12 has been implemented in the joint 7 of the coiling system 1, which detects the change of the separator arm 8 inclination, thus being the feedback signal for the control system. The feedback system from the angular sensor 12 is used to change the heights H of the brake system capital to in such a way, that the sheet-metal coiling angle is kept at a constant level with coiling and uncoiling sheet-metal bands, which causes the change of the sheet-metal from coil 6 diameter. Maintaining a constant angle a on the one hand, causes that the pressing force exerted by the separator arm 8 on the sheet-metal bands 5 is maintained at a constant level, thus reducing the risk of damage of the sheet-metal being wound, and provides, on the other hand, uniform wear of brake linings 10, which extends its operation time.