SU1030663A1 - Method of determination of mass of material winded from the winder drum - Google Patents

Abstract

A METHOD FOR DETERMINING A MASS OF A MATERIAL WRAPPED ON THE DRUM SWIMMER by measuring the winder drum radius and fixing the material end passage, characterized in that, in order to improve the accuracy, at the time the NIN end of the material passes, a braking signal is generated with a given winder drum torque and its angular velocity is measured, then the time interval from MOMiSHTa for outputting a braking signal to the full stop of the coiler drum and the radius of the material roll is measured, and the mass of the material is calculated using the formula FMe-MsUOs And 1p g% RpVN drum reel deceleration time; torque; Mj, is the braking torque; (angular velocity; m is the mass of the drum of the winder; radius of the drum, is the radius of the roll.

Description

The invention relates to a weight-bearing mechanism for its mechanics, in particular, to a method for determining and accounting for the mass of produced roll products.

There is a known method for determining the theoretical weight of the web material by specifying the width, thickness and specific weight of the material strip, multiplying these quantities, measuring the strip length and calculating the theoretical weight

However, the value of theoretical Becci coil determined by this method is not always suitable for spreading.

: The closest to the invention to the technical essence is the 4th method for determining the mass of material of the winder being coiled onto the drum by measuring the radius of the winder drums and fixing the passage of the end of the material.

In a known manner, the end of the material’s passage through the presence sensor is recorded, the values of the drum drum radius, the width and density of the material are determined, the material thickness, the number of revolutions of the winder are measured, and the length of the reeled flat is calculated from the presence signal;

L - No. (ro + Hii),

where r is the radius of the drum winder;

n - the number of revolutions /

h is the material thickness. Using the values of the calculated length, the measured thickness and the nominal width and density of the material, the mass of the roll is determined by the formula

Wi-UbVi L.

where b is the width of the material;

No. is the density of material 21. The known method has a lack of accuracy in determining the mass of the coil due to inaccurate determination of the length of the strip, since the calculation of the length of the strip is judged by the number of turns in a roll, which is taken equal to the number of revolutions of the winder drum. during acceleration and deceleration, the number of revolutions of the drum does not correspond to the number of turns in the roll due to the presence of slippage, which increases the error in measuring the length. This error will be particularly significant when winding short bands and is 2–3%.

In addition, the use of nominal values of the width of the strip instead of actually measured, differing from the nominal values in actual rolling by 1-2%, introduces an additional error in determining the mass of the coil.

The aim of the invention is to improve the accuracy of determining the mass of material that is coiled up on a drum.

This goal is achieved in that, according to the method for determining the mass of material rolled up on the winder drum by measuring the barbel reel radius and fixing the passage of the end of the material, at the time of passage of the end of the material, a braking signal is generated with a given brake torque of the reel drum and its angular velocity is measured, then measure the time interval about the moment of issuing the signal for braking until the coiler reel is completely stopped and the radius of the material roll, and the mass of the material is calculated by the formula

2.-btMa + Mc) -a; oV i5

IfTj. - --m-rm; - f

with

where t is the deceleration time of the reel drum, s;

MD - torque, Nm;

M ,, - braking torque, Nm;

UDc- angular velocity, 1 / s,

t „is the mass of the winder drum, kg; g drum radius, m, RpvA roll radius, m. The determined mass of the roll according to the proposed dependence will have a positive effect, since the measurement is carried out in a steady state, which ensures the necessary accuracy of measuring the mass of the roll. For example, the angular velocity of the drum winder; measured at the end of the coiling, when the drum slips relative to the inner coil of the roll is absent, the roll radius is measured when the drum with the roll stops, which allows the use of contact, more accurate radius gauges, and the measurement of the time interval is not difficult.

The drawing shows the proposed device for implementing the method.

The device for determining the mass of the coiled strip 1 on the drum 2 of the winder contains a sensor 3 — material availability, speed sensor 4, time pulse generator 5, roll radius sensor 6, computing unit 7, whose inputs are connected to the outputs of speed sensor 4, time pulse generator 5, sensor 6 of the roll radius, and the recorder 8 connected to the output of the computing unit 7, the control inputs of the speed sensor 4 and the time pulse generator 5 are connected to the output of the material presence sensor 3, the roll radius sensor 6 and the second control The generator 5 input pulse time is connected to the output of speed sensor 4.

When the end of the strip 1 passes through the sensor 3, a signal is generated at its output, which is a command to brake with water from the drum 2, and the speed sensor 4 and the time pulse generator 5 are activated. from sensor 4, it is memorized, and the time pulses of generator 5 are counted. When the drum 2 completely stops, the winders, i.e. the value of the angular velocity of sensor 3 is zero, the signal of sensor 4 of speed produces a control signal: that prohibits the generator of 5 time pulses and includes a sensor 6 of a roll radius. Value

the coil radius enters the computational unit 5, in which I calculate the mass of the reeled coil.,. The value of the mass of the coil is recorded by the recorder 8.

Thus, the implementation of the proposed method will improve the accuracy of measuring the mass of the coiled material on the reel drum, ensuring the measurement error

0 not more than 0.2%,

Improving the accuracy of measuring the mass of rolled metal has an important economic value: it reduces metal losses during redistribution, improves control of consumption rates, streamlines planning and accounting of products and mutual settlements between producers of rolled products, increases the economic effect of selling products in theoretical weight.

0

Claims (1)

METHOD FOR DETERMINING THE WEIGHT OF MATERIAL WRITTEN ON THE REEL DRUM by measuring the radius of the winder drum and fixing the passage of the end of the material, characterized in that, in order to R · R'J braking time of the reel drum; torque; braking moment; angular velocity; winder drum mass; drum radius, roll radius. SU ₍₁ „1030663