SU1680609A1 - Band reeling device - Google Patents

Abstract

The invention relates to rolling equipment and improves the reliability of operation of the device for winding a particularly thin metal strip into a roll. The drive shaft 2 in the device is made in the form of a pneumatic impeller 3, and the coil 7 is connected with the drive shaft 2 through a single-flange hollow drum 4 coaxially fixed by a flange 5 on the drive shaft 2. On

Description

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The cylindrical surface of the drum 4 has openings 8 aligned with the openings 9 of the cylinder of the coil 7, and the impeller b for air suction is located in the free end of its internal cavity. The guide sleeve 10, which includes the straight and arcuate parts, is a three-cavity duct, in which two extreme cavities intended for air injection are connected to the middle cavity, intended for wiring the tape, with transverse slots with constant angles of inclination in the direction of movement tapes. The guide sleeve 10 in the arcuate portion is connected to a single-cavity arc-shaped chamber located between the flanges of the drum and

The invention relates to rolling production, and more specifically to a device for winding a particularly thin tape into a roll, and may find application in the manufacture of very thin tapes on the basis of ferrous and non-ferrous metals and alloys.

The purpose of the invention is to increase the reliability of the device in operation.

In Fig.1 schematically shows the proposed device, a General view; figure 2 - section aa in figure 1; in FIG. 3, a single-flange coil for winding a tape, a slit; 4 is a two-flange reel for winding a tape, a slit; figure 5 - section B-5 in fig.Z and 4.

The device comprises a frame with shaft supports 1, a drive shaft 2 mounted on the frame, a pneumatic impeller 3 (nozzles for the flow of compressed air and the turbine casing are not shown) mounted on one side of the shaft 2, the hub of the shaft 2 in the form of a single-flange hollow drum 4 coaxially fixed flange 5 to the shaft 2; impeller b for suction of air installed in the free end inside the shaft hub 1, the coil 7, the holes 8 in the cylindrical 1 surface of the single-flange hollow drum 4 and the holes 9 in the cylinder of the coil 7, aligned with each other; a guide sleeve 10 containing a straight line 11 and an arcuate honor 12, the guide sleeve consisting of two extreme cavities 13 designed to inject air and a middle cavity 14 for conducting the tape 15 and includes transverse slots 16 with fixed angles of inclination in the direction movement of the tape 15; single-chamber chamber 17 with transverse slots 18, the angles of inclination of which to the tangent at the point of

coils with axial gaps and provided with transverse slots with variable inclination angles, with access to the internal cavity of the chamber. The single-cavity chamber is connected to the outer arc-shaped chamber of the three-chamber guide sleeve 10, and the inner chamber of the latter ends in a narrow transverse slit inclined at an angle to the cylinder of the coil in the direction of movement of the tape. Such an actuator allows to simplify the design of the device, reduce its size and weight, and improves the reliability of the device, preventing the belt from breaking, looping when re-winding the tape on the previously wound part of the roll. 2 hp f-ly, 5 silt,

the outlets increase from the point of connection of the single-cavity chamber 17 with the arcuate part 12 of the guide sleeve 10; axial clearances 19 between the single-chamber chamber 17, as well as the arcuate part 12 of the guide sleeve 10 and the flange 20

valuable hollow drum 4 and flange 21;

grooves 22 or blind holes 23 whose cross sections increase to the periphery of the flanges 20 of a single-flange hollow drum 4 or flange 21 of the coil 7; channels 24 connecting the grooves 22 or blind holes 23 with the internal cavity of the single-flange drum 4; cross slot 25 in

the end of the inner cavity 13, directed at an angle to the center of the drum in the direction of movement of the belt, the transverse slit 26 at the point of abutment of the end part of the single-cavity chamber to the guide sleeve

and directed tangentially to the latter.

At the same time, the central angle a of rotation of the arcuate part of the guide sleeve is in the range of 0 a Tg / 2.

Impeller b can be positioned in

the free end inside the single-flange drum 4, rigidly fastening it to the walls or free of the drum, on a shaft with a separate drive (not shown). The parts of the guide rudder 10 and the single-cavity chamber 17 can be joined rigidly or on hinges. The coil can be single-flange and two-flange.

The device works as follows.

The device is connected to any unit from which a particularly thin

tape, in a high-speed stream of air. Compressed air is driven into rotation

Bink 3 and, therefore, the drive shaft 2, a single-flange hollow drum 4 and a coil 7 with a peripheral speed of 1 to 10% higher than the speed of movement of the tape. This is achieved by adjusting the cross section of the outlet nozzles of the impeller nozzles (not shown).

At the same time, the air passes through the slots 16 into the middle chamber 14 of the three-cavity guide sleeve 10, into the one-cavity chamber 17 and then through the slots 18, 25, 26 the air passes into the chamber winding the tape on coil From this chamber, air is partially removed by gravity through axial gaps 19 located between the flanges of the single-flange hollow drum, the flange of the coil 7 and the guide sleeve 10, as well as the single-cavity chamber 17. Most of the air is removed through the holes g 9 in the coil 7 and the holes 8 in the drum 4 are coaxial with it due to the suction of air by means of the impeller 6. If, as a possible variant of making the device adopted, the impeller 6 is free from the drum 4 mounting the impeller 6 on a shaft with a separate drive, then the rotary wheel rotates in the direction allowing air to be sucked out of the inner cavity of drum 4. Due to air suction, the impeller from the inner cavity of drum 4 partially removes air from the winding chamber through slots 22 or blind holes 23 and channels 24 connecting them to the inner cavity of the drum 4. With the described movement of air inside the winding chamber, an air vortex is formed, spiraling around the cylindrical surface of the coil.

Tape 15 in the guide sleeve 10 is supplied to the coil in a suspended state, since the air jets entering the middle cavity 14 through inclined transverse slots 16 create normal components of the air backwaters, which eliminates friction of the tape on the walls of the middle cavity 14, while the tangential component The air overpressure aligns the belt both at the entrance to the middle cavity 14 and when it moves along the straight line 11 and the arcuate 12 parts of the guide sleeve 10. Therefore, sweat is eliminated in this part of the belt movement. The speed of movement of the tape, the formation of folds and loops.

Already in the arcuate portion 12 of the guide sleeve 10, the linear movement of the tape 15 is converted into a curvilinear without loss of speed, and when entering the depot area of the air jet coming from the transverse slots 18 of the single-cavity chamber 17. A downward spiral-shaped trajectory of the front end part of the tape 15 is formed. Since an increase in the angles of inclination of the transverse slots 18 allows not only with increasing efforts to press the tape against the cylindrical surface of the coil, but also to form an air vortex around the cylindrical surface of the coil. carcass.

The formation of the air vortex in a spiral is also facilitated by the special directions of the transverse slits 25 and 26. The direction of the slit 25, chosen at an angle to

The center of the drum in the direction of the belt movement creates a zone of reduced air pressure between the belt 15 and the slot 25 at the point where the belt leaves the three-cavity guide sleeve 10 into the cavity of winding the belt on the reel. This facilitates the task of deflecting the movement of the belt towards the center of the drum. The compressed air jet emanating from the transverse slit 25 contributes to the spiral winding of the air jet coming from the transverse slit 26, which is located in the zone of abutment of the end portion of the single-cavity chamber 17 to the guide sleeve 10. The air jet emanating from

slit 26 slides along the inner surface of the arcuate portion 12 of the guide sleeve 10, and then it is thrown at an angle to the center of the coil in the direction of movement of the tape with a jet of air,

flowing out of the slot 25. Thus, in the cavity of winding the tape on the coil there are no stagnant zones, the air continuously moves in a spiral towards the center of the coil, carries the tape, i.e. the tape is twisted into a spiral using an air vortex created around the cylindrical surface of the coil. With such a movement of the tape, the capture of the tape 15 by the coil 7 occurs further due to friction between them, let alone that due to the pressure drop. The air between the winding zone of the tape on the coil and the internal cavity of the drum is particularly thin; the tape sticks to the cylindrical surface of the coil.

In case there is a need to rewind the tape on the previously wound part of the roll, the openings 9 B of the cylindrical surface of the cat 7 are blocked and the movement of the air vortex is partially changed. The air leaves the cavity of the winding tape in the inner cavity of the drum 4 through the grooves 22 or blind holes 23 and channels 24.

In this case, the rewinding tape is pressed against the previously wound portion of the roll at the flanges 20 and 21, and is also twisted into a spiral using an air vortex. After winding the first turn, the next turn presses the previous one, and since the initial circumferential speed of the coil is provided by an impeller slightly exceeding the linear speed of the tape, some tightening of the first turn occurs due to the tension of the tape. The same tension causes the pneumatic turbine to be reduced to the nominal value due to the high compliance of the drive (soft drive characteristic) and its low inertia. As the coil winds up, its radius increases, so the angular speed of the coil decreases while maintaining the nominal speed of the tape. The movement of the tape, both in the guide arm and in the winding cavity on the coil, occurs with a slight tension without folds and loops.

Claims (3)

Claim 1. Device for winding a tape containing a drive shaft mounted on a frame, made with a hollow hub, having radial holes and a flange coil with radial holes on a cylindrical surface mounted on the drive shaft hub, connected to an air suction system a cavity for supplying the tape to the coil, the mechanism for gripping and pressing the tape to the coil, made in the form of a chamber enclosing the coil, located between its flanges and provided with slotted holes l compressed air supply characterized in that, in order to increase reliability in operation, the shaft drive is made in the form of a pneumatic impeller, its hub is fitted with a flange rigidly mounted on the shaft, and an impeller for suction of air placed in its cavity, and the guide sleeve is formed by conjugated straight lines and arcuate portions and additionally has two cavities for air injection, connected to the cavity for feeding the tape by means of transverse slots with constant inclination angles, and a single post, connected to the external cavity of the arcuate part of the sleeve, while the internal arcuate cavity of the guide sleeve ends with an end to the transverse crevice; transverse slots having variable angles tilt with the output into the internal cavity of the chamber, and ends with a transverse slit adjacent to the guide sleeve and directed tangentially to it at the point of abutment of the single-cavity chamber, and on the inner side, in the flanges of the shaft hub and the coil, holes are made, which are connected by channels with the internal cavity of the hub, whose cross sections increase to the periphery of the flanges. 2. Device pop. 1, characterized in that the central angle of rotation of the arcuate portion of the guide sleeve does not exceed 90 °. 3. Arrangement of pop, 1, characterized in that the angles of inclination of the transverse slots to the tangent at the point of their exit into the single-cavity chamber increase from the point of connection with the arc-shaped part of the guide sleeve. 02 6090891 ..- .. Thebes. five