RU2428277C1 - Method and device to reel thin amorphous tape running off casting drum - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy. Proposed device comprises stripper, driving reeling drum, splitting pull rolls, holder with drive deflecting roller secured thereon and arranged above tape feed line, idle deflecting roller and cut plate. Said holder may turn about center arranged misaligned with reeling drum rotational center. Proposed method comprises ejection of tape from casting drum, its direction and gripping by pull rolls. Driving deflecting roller is used to transform running tape into loop to be guided around reeling drum in incomplete revolution. Tape is pressed against drum surface to feed said loop under running tape and start its reeling. Tape front end gripped by pull rolls is cut off.

EFFECT: reliable process.

3 cl, 4 dwg, 1 ex

Description

The present invention relates to metallurgy, and in particular to a process for manufacturing an amorphous tape, for example, for power transformer cores.

The production of amorphous tape is due to the high cooling rate of the melt. For this, drum crystallizers with a peripheral speed of up to 25 ... 30 m / s are used. The problem of winding the tape coming off the drum at such a speed, to date, remains unresolved.

There is a method of winding a tape onto a winder's drum using the front end of the tape for filling under the first turn of the winding tape using belt strippers, which capture the front end, press it to the surface of the winding drum, feed under a moving tape (see L.V. Polyakov, B. G. Ustinov. “Automatic strip stripper with quick-change belts” - Metallurgical equipment, NIIINFORMTYAZHMASH, 1969, No. 7, p.21).

This method involves the capture of the oriented front end of the strip with a thickness of 0.5 ... 2.5 mm, emerging from the last stand of the rolling mill, or other processing units of strip rolling and the subsequent winding of the strip into a roll on a drum coiler. In this case, the strip speed does not exceed 0.75 ... 1.5 m / s. Using this method with the use of belt whipping for winding an amorphous tape with a thickness of 0.02 to 0.05 mm in a stream with a casting machine is not possible due to chaotic vanishing its front end from the casting drum, aggravated by high speed (25 ... 30 m / s), as well as due to the uncertainty of the nature of the fastening of the front end of the tape on the winding drum and, therefore, ensuring the winding of the tape with the required tension.

Closest to the proposed invention in technical essence is a method of winding a thin amorphous tape coming off the casting drum, including orienting the tape relative to the winding drum and winding the tape into a roll (see, for example, SU 1570839 A1 1990), in which coming down from the foundry the tape of the drum with the help of air wiring is directed into the gap between the working rough surface of the rotating drum and the slippery motionless tape covering it, which is captured by the drum almost its full revolution, by a jet of air ear air wiring press the front end of the tape to the drum, completing the process of capturing the tape on the drum with its subsequent winding.

A necessary condition for the capture and winding of the tape in this way should be that the magnitude of the friction force of the captured tape on the drum, of course, exceeds the friction force of this tape on the tape covering the reel drum. But this condition can be fulfilled only with a tight fit of the tape to the surface of the winding drum, which is difficult to achieve with the task of the front end of the tape in a stream of air, when its flutter is inevitable.

The technical result of the invention is the ability to receive, orient, capture a fast-flying tape as a result of:

- orientation in the wiring of the front end of the tape coming down from the casting drum, feeding it into the divorced pulling rollers;

- capture of the tape by pulling rollers with the pulling of its "slack";

- formation of a loop from the moving tape coming from the casting drum;

- capturing the loop under the moving belt and the rotating winding drum;

- cutting off the front end of the tape and removing it with pulling rollers;

- winding the tape onto a winding drum with automatically adjustable speed and tension over the entire melting volume.

The technical result is achieved by turning 280 ... 290 degrees located above the moving tape of the bypass drive roller mounted on a holder with a center of rotation eccentrically located relative to the axis of the winding drum, ensuring the loop is pressed against the surface of the winding drum under the moving tape to capture it while cutting off the captured pulling rollers of the front end of the tape discharged into waste, winding the tape on the drum with adjustable speed and tension over the entire volume of the melt,

The inventive method of winding a thin tape and installation for its implementation is illustrated in figure 1, 2, 3, 4, where:

- figure 1 schematically shows the diluted position of the pulling drive rollers, the initial position of the bypass drive roller at the moment of the descent of the front end of the tape from the casting drum.

- figure 2 shows the position of the pulling rollers at the moment they capture the front end of the tape and the position of the bypass drive roller at the beginning of the formation of the loop on the moving belt.

- figure 3 shows the position of the bypass roller at the end of the loop around the winding drum.

- figure 4 shows the moment of cutoff of the front end of the tape by the cutter and the overlapping of the end of the tape under the moving tape.

The thin-tape winding device comprises a winding drum 1, a drive roller 2, a drive roller 3, drive pulling rollers 4 and a cutter 5. The drive roller 2, the drive roller 3 and the anvil 6 are mounted on a clip 7 with a rotation center 8. The winding drum 1, all the rollers and the mechanism of rotation of the cage are equipped with individually adjustable electric drives, the cutter 5 is equipped with an induction-dynamic drive of instant action. Automation of the electric drive system is provided by the adaptive torque control system in the feedback system of the casting drum drives 9 and the winding drum 1. For preliminary orientation of the tape 10 coming from the casting drum, there is a hinged wiring 11. The guide wiring 11, the winding drum 1 and the pulling pull rollers 4 are mounted on bed.

The inventive method is as follows, with the device for winding the tape is placed directly at the foundry drum of the installation for the production of thin tape.

The front end of the tape 10, which flies from the casting drum 9, is guided through the wiring 11 into the adjustable pulling rollers 4, at the command of the operator, the rollers are reduced and the tape is caught by the rollers. Further, in automatic mode, the wiring 11 is tilted, the cage 7 with the bypass drive deflecting roller 2 and the idle deflecting roller 3 is rotated from an individual drive (not shown) around axis 8 by an angle of 280 ... 290 degrees. At the same time, at the end of the turn, the deflecting roller 2 will occupy a position under the moving tape, pressing against the winding drum 1. At this moment, the cutter 5 on the anvil 6 cuts off the front end of the tape. The free end in the form of a loop is captured, compressed between the moving tape and the rotating winding drum, and the process of winding the tape begins. Captured by the pulling pulling rollers 4, the front substandard end of the tape is cut off and sent to waste.

Example of execution: in the production of an amorphous tape, for example, with a thickness of 0.03 mm, a width of 30 mm and a peripheral speed of the casting drum of 25 m / s, the front end of the tape is gripped by adjustable pulling rollers, the loop of the moving tape around the winding drum is traced, the cut-off loop of the main tape and roll the tape.

Thus, the proposed method for winding a thin tape and a device for its implementation allow grabbing by pulling pulling rollers, the front end of the tape coming down from the casting drum, form a loop from the moving tape, loop it around the winding drum, ensure that the tape is pressed against the surface of the drum, while cutting the front end, feed the loop under the moving belt, grab it with a winding drum and wind the entire volume of melting into a roll.

The system of automatic torque control of the winding drum drive will provide rolls of the required winding density.

Claims (3)

1. A method for winding a thin amorphous tape coming down from a casting drum, comprising ejecting the tape from the casting drum, orienting the tape relative to the winding drum and winding the tape into a roll, characterized in that the front end of the tape coming down from the casting drum is captured by adjustable pulling rollers using the drive deflecting roller located above the tape form a loop from the moving tape, circle it around the winding drum for an incomplete revolution, ensure that the tape is pressed against the surface of the drum, feed aphids under the moving tape and at the same time cut off the front end of the tape captured by the pulling rollers, dumped into the waste, carry out the winding of the tape coming from the casting drum into a roll. 2. A method for winding a thin amorphous tape descending from a casting drum according to claim 1, characterized in that the loop of the loop formed from the tape moving from the casting drum around the winding drum is traced around the winding drum at an angle of 280 ... 290 ° . 3. A device for winding a thin amorphous tape coming down from a casting drum, comprising a guide wire mounted on a bed, a drive winding drum, characterized in that it is provided with adjustable pulling rollers, a clip mounted for rotation around a center located eccentrically relative to the center of rotation winding drum, mounted on a cage drive deflecting roller located above the tape feed line, and idle deflecting roller, a cutter installed in front of precision drum, while the drive winding drum and adjustable pulling rollers are installed on the frame.

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