RU2602309C1 - Device and method of spiral curvilinear air duct manufacturing - Google Patents

Abstract

FIELD: metal processing.

SUBSTANCE: invention relates to metal forming and may be used for production of helical curvilinear air duct. Device includes first supply shafts for metal sheet pulling through, copying mechanism, made with possibility of pulled metal sheet cutting from first supply shafts in longitudinal direction into three strips along straight line or wavy line by preset path, wherein two side strips, having by one straight edge are rolled into rolls for subsequent processing, second supply shafts for pulling through of third, central, strip into edge forming device with formation of connecting locks on side edges with subsequent twisting of strip into spiral shape. Devices are equipped with seaming rollers for locking connections compacting, which have possibility to move across metal strip travel and cutoff device for separation of produced air duct from metal strip. Device versions allow to produce curvilinear air duct from precut by specified path strip.

EFFECT: expanding performances of devices used for producing spiral curvilinear air duct by described above method.

4 cl, 14 dwg

Description

A device and method for manufacturing a spiral curved duct relates to a device and method for manufacturing a spiral curved duct, in which the straight sections of the duct are integrated with the curved portion of the duct. A spiral-curved duct having straight and curved sections is formed from a strip that has been previously cut along a certain path.

The first embodiment of the claimed invention provides a device for the manufacture of a spiral curved duct, including the first feed shafts, a copying mechanism configured to cut the stretched metal sheet in the longitudinal direction into strips in a straight and wave-like lines along a predetermined path, second feed shafts, an edge-forming device for forming connecting locks on the lateral edges of the tape, a spiral-wound device for twisting the tape in a spiral form with subsequent compound seaming roller tape edges having the ability to move across the movement of the metal strip and cutting device for the separation of air produced from a metal strip.

The second embodiment of the claimed invention provides a device for the manufacture of spiral curved ducts, comprising first feeding shafts, a copying mechanism for cutting the stretched metal sheet in the longitudinal direction into tapes in a straight and wave-like lines along a predetermined path, second feeding shafts for pushing metal tapes into spiral devices, spiral devices of different diameters to achieve the simultaneous passage of metal strips between the sealing rollers and p displacements of moving metal tapes in such a way that it is possible to manufacture several ducts, feed shafts for advancing metal tapes into edging devices, edging devices for forming connecting locks on the lateral edges of tapes, spiral-wound devices for twisting metal tapes into a spiral form, followed by connecting the locks with sealing rollers with the ability to move across the movement of metal tapes and cutting devices for separating ducts from metal tapes.

The third variant of the claimed invention provides a device that differs from the first or second variant in that the copying mechanism is equipped with a CNC system for controlling the movements of the cutting knives and counter-knives mounted on linear motion systems.

Hereinafter, embodiments of the claimed invention will be described with reference to the accompanying drawings.

FIG. 1. Cutting the metal sheet onto tapes for the manufacture of a spiral curved duct.

FIG. 2. Side view of a device for manufacturing a spiral curved duct.

FIG. 3. A plan view of a device for manufacturing a spiral curved duct.

FIG. 4. Cross section of the copying mechanism with one copied segment.

FIG. 5. Side view and top view of the edge of the edge forming device.

FIG. 6. Section of a movable platform with edge-forming rollers.

FIG. 7. Section of edge-forming rollers.

FIG. 8. Cutting device.

FIG. 9. An example of cutting a metal sheet with a copying mechanism with two segments.

FIG. 10. Side view of a device for the manufacture of spiral curved ducts.

FIG. 11. The plan view of the device for the manufacture of spiral curved ducts.

FIG. 12. A plan view of the copying mechanism with two cutting knives and counter-knives mounted on linear displacement systems and controlled by displacements by the CNC system.

FIG. 13. A plan view of the copying mechanism with four cutting knives and counter-knives mounted on linear displacement systems and controlled by displacements by the CNC system.

FIG. 14. Side view of movable carriages with a detachable knife and a counter-knife installed.

In FIG. 1-8 depict a device and an example of cutting a metal sheet for manufacturing a spiral curved duct in accordance with the first embodiment of the claimed invention.

In FIG. 9-11 depict a device and an example of cutting for the manufacture of spiral curved ducts in accordance with the second embodiment of the claimed invention.

In FIG. 12-14 depicts an example of the use of cutting knives and counter-knives in the copying mechanism installed on linear displacement systems and controlled by displacements by the CNC system.

In the first embodiment of the claimed invention, the metal sheet 1 is pulled by the first feed shafts 2 into a copying mechanism including a stand 5 with the possibility of installing a shaft 13 with an inserted segment 4 of a given diameter. The shaft 13 through a mounted sprocket 14 of a given diameter and a chain transmission is connected with the first feed shafts 2, rotating through a gearbox from an electric motor (not shown in the drawings). Rotating on the shaft 13, the segment 4 with its edges moves the levers 16 through the rollers 15 with the cutting knives and counter-knives 3 mounted on them. Moreover, the rollers 15 are spring-loaded and can move vertically. The levers 16 are divided by the axis of rotation into equal shoulders and have the ability to swap along the bearing support 17 for a given diameter of the copied segment 4. For straight cutting of the sheet 1, the lever 16 is parallel to the movement of the sheet 1 and at the same time the roller 15 is disengaged by the control handle 35 from engagement with the edge of the segment 4, and the locking pin 15a locks the lever 16 in a predetermined position.

The cut metal tapes A and B are rolled up for subsequent connection through straight edges into one strip with further formation of connecting locks on the lateral edges and the formation of spiral curved ducts from the resulting tape.

The width of sheet 1 is calculated in advance.

The metal tape B is pulled through the second feed shafts 6 into the edge-forming device 7. The edge-forming device (Fig. 5-7) consists of platforms 23 fixed movably, but with rotation restriction by an emphasis 24, on shafts 20 moving in linear bearings 18 mounted on bed of edge-forming device 7. Edge-forming rollers are installed on movable platforms 23. For constant pressure of edge-forming rollers 22 to lateral edges of a moving metal strip B, tension springs 21 are attached, attached e at one end to the bed of the edge forming device 7, and at the other end to the moving shafts 20 through the connecting plate 19.

In FIG. 7 shows an exemplary sequence of forming connecting locks on a metal tape B with edge-forming rollers 22.

There may be more than the specified amount of edge-forming rollers.

The edge-forming rollers are preferably of small diameter and are mounted through bearings on an axis. It is possible to move the frames of the edge forming device 7 to a predetermined width of the metal tape B.

Next, the metal tape B passes through a spiral-wound device 8, where the tape is twisted into a spiral shape of a given diameter and is fed between the sealing rollers 10a and 10, rotating through a gearbox from an electric motor (not shown in the drawings), after having straightened one edge from a possible flattening of the connecting lock.

The metal strip B has wave-like and rectilinear lateral edges.

Based on this condition, the sealing rollers 10a and 10 have the ability to move across the movement of the tape B on linear motion systems 12 with the control handle (not shown in the drawings).

The connecting locks are inserted into each other, and the sealing rollers compress the locking joints. After the manufacture of the spiral curved duct, it is separated from the metal strip with a cutting knife 26.

As shown in FIG. 8, the cutting device 9 includes a disk 31 rotating on rollers 34 along the bed guide 33. The rotation is made by the motor 11 through the edge of the disk 31. Guides 28 are mounted on the disk 31 for moving the plates 32 with the stops 30 for the cord 27 mounted on them. Cutting knives 26 are also installed on the plates 32. For the return movement of the plates 32, tension springs 29 are installed and are fixed with one the end to the guide 28, and the other end to the plate 32. It is possible to move the end of the spring 29 along the guide 28 when changing the diameter of the cut-off duct.

To cut the manufactured duct through the tension mechanism 25, the cord 27, stretched around the circumference along the stops 30, pulls the plate 32 toward the center. Having reached the air duct, the engine 11 is turned on, the disk 31 begins to rotate. Cutting knife 26 cuts the duct in a circle. When using one cutting knife 26, one revolution of the rotary disk 31 is sufficient. When using two cutting knives, half a revolution of the rotary disk 31 is sufficient. After stopping the engine 11, the cord 27 loosens and the tension springs 29 return the plates 32 to their original position.

An example of a second embodiment of the claimed invention.

The metal sheet 1 is pulled by the first feed shafts 2 into a copying mechanism including a stand 5 with the possibility of installing a shaft 13 with mounted segments 4a 4 of a given diameter. The shaft 13 through a mounted sprocket 14 of a given diameter and a chain transmission is connected with the first feed shafts 2, rotating through a gearbox from an electric motor (not shown in the drawings). The metal sheet 1 is cut into strips. The cut metal tapes G and Z are rolled up for subsequent connection through straight edges into one strip with further formation of connecting locks on the lateral edges and the formation of spiral curved air ducts from the resulting tape. The width of sheet 1 is calculated in advance. The cut metal tapes D, E, G are pulled by the second feed rolls 6 into the spiral devices 37, 38, 39 to achieve the simultaneous passage of the metal tapes D, E, G between the sealing rollers 49, 50, 51 and the placement of the moving metal tapes in such a way that production of several air ducts is possible. Next, the metal tapes are pulled by the feed rolls 40, 41, 42 into the edge bending devices 43, 44, 45 to form connecting locks on the lateral edges of the tapes and pass through spiral-wound devices 46, 47, 48, where the metal tapes are twisted into a spiral shape of a given diameter and are fed between seaming rollers 49, 50, 51, rotating through gears from electric motors (not shown in the drawings). Metal tapes D, E, Zh have wavy and straight lateral edges. Based on this condition, the rolling rollers 49, 50, 51 have the ability to move across the movement of metal tapes D, E, G on linear systems with a control stick (not shown in the drawings).

The connecting locks are inserted into each other, and the sealing rollers compress the locking joints. After the manufacture of spiral curvilinear ducts, they are separated from the metal strips in cutting devices by cutting knives 52, 53, 54.

Another embodiment of the present invention proposes the use of a CNC system in the copying mechanism to control the movements of the cutting knives and the counter-knives mounted on linear motion systems. In FIG. 12-14 illustrate knives and counter-knives mounted on movable carriages 58, driven by servomotors 55 through spindles 57 along guides 56. For synchronous operation of cutting knives and counter-knives and advancement of the metal sheet 1, a servomotor is installed on the first supply shafts 2. Servo motors are also mounted on movable carriages for tangential control of cutting knives and counter-knives. The use of servomotors in this embodiment for linear movement and tangential control of knives and counter-knives increases the accuracy of cutting the metal sheet.

Claims (4)

1. A method of manufacturing a spiral curved duct, comprising supplying a metal sheet, cutting it in the longitudinal direction by a copying mechanism into tapes in a straight line, turning into a wave-like line by cutting knives, the transition point of a straight line in a wave-like line and vice versa on one side edge of the tape in the longitudinal direction from the transition point of a straight line into a wave-like line on its other lateral edge for one revolution of the copy segment, the formation of connecting locks on the sides edges of at least one metal strip, the subsequent winding of at least one metal strip in at least one spiral duct and separating the cut-off knives of at least one duct made of at least one metal strip. 2. A device for manufacturing a spiral curved duct, containing the first feed shafts, a copying mechanism containing at least one copying segment with detachable knives and counter-knives, configured to cut the stretched metal sheet in the longitudinal direction into tapes in a straight line that goes into a wavy line along a predetermined path, the second feed shafts, at least one edge-forming device for forming connecting locks on the lateral edges of the metal enty, at least one spiral-wound device with seaming rollers, made with the possibility of moving across the movement of the metal tape and twisting into a spiral duct of the metal tape, and at least one cutting device for separating the manufactured duct from the metal tape. 3. A device for the manufacture of a spiral curved duct, containing the first feed shafts, a copying mechanism containing at least one copying segment with detachable knives and counter-knives, configured to cut the stretched metal sheet in the longitudinal direction into tapes in a straight line that goes into a wavy line , second feed shafts, at least one edge-forming device for forming connecting locks on the lateral edges of at least one metal tape you, at least one spiral-wound device with seaming rollers, made with the possibility of moving across the movement of the metal tape and twisting into at least one spiral duct of at least one metal tape, and at least one cutting device for separating at least one made duct from at least one metal strip. 4. The device according to claim 2 or 3, characterized in that it is equipped with a CNC system for controlling the movements of the cutting knives and the counter-knife of the copying mechanism.

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