SU838395A1 - Method of determining length and (or) utilization factor of negative tolerance zone of long articles - Google Patents

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su

Batch: N0112332

Date: 03/05/2001

Number of pages: 4

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838396 and the coefficient of use of the field of minus le tolerance is calculated

According to the form R _m

K =, o nominal weight of a meter of the product.

linear that

The method consists in eliminating the measurement of the length of the control sample and the need to cut the sample, the length of which is strictly defined.

The determination of the length of the control sample is calculated based on the data obtained by weighing the sample using two load-bearing supports. i

The drawing shows a block diagram of the device.

The circuit contains an arbitrary length of the control sample 1, rollers 2 for moving the sample 1 to the intake channel 3, stop 4. The intake channel 3 is equipped with load-bearing supports 5 and 6 and load cells 7 and 8. The outputs of load sensors 7 and 8 are connected to the inputs of digital auto-compensators 9 and 10 respectively. The outputs of the digital auto-compensators 9 and 10 are connected to the input of the control unit 11, the latter is connected to the calculation unit 12.

The device operates as follows.

V

.. The control sample 1 is rolled on rollers 2 into the intake channel 3 until it stops 4. Sample 1 acts on the load-bearing supports 5 and 6 · with forces Ru and P ₂ , the sum of which represents the weight P _about sample 1. Knowing the distance between the supports and the position of the center of gravity in equilibrium, you can get the formula for determining the length of the control sample 1 'o - ^{2 |} p (r ' ^Λ)

Substituting the obtained relation (1) into the expression for determining the coefficient of use of the minus tolerance field, we obtain

V- РЦ- ° о л- —j, ——, about where Р _m is the nominal weight of a running meter of the product.

(1) (2) to

In case if we combine the stop 4 with the axis of the support b nearest to it, then the formula (1) will take the form “2E | 'B” o ⁼ ~ B ---> a formula. (2) .K = 2P _AND . ^ -, B

ABOUT . The last expression is convenient for determining the theoretical weight ^Р Т =? // ^{К = Р} о / д ' ² РН · ^Б ' V ⁼ £ / о '' where Ро / _О - physical weight;

M _m is a constant factor, different for different products.

Claims (2)

and the coefficient of utilization of the field tolerance is calculated by the formula K, o where Rc is the nominal weight of a unit meter. The method consists in eliminating the measurement of the length of the control sample and the need to cut the sample, the length of which is strictly defined. The determination of the length of the control sample is calculated on the basis of the data obtained when the sample is weighed using two weight measurements. I The drawing shows the block diagram of the device. The scheme contains an arbitrary length of control sample 1, rollers 2 for moving sample 1 to receiving channel 3, stop 4. Receiving channel 3 is equipped with weighing supports 5 and b and strain gauges 7 and 8. The outputs of strain gauges 7 and 8 are connected to the inputs of digital compensators 9 and 10, respectively. The outputs of digital auto compensators 9 and 10 are connected to the input of control unit 1, the latter is connected to calculation unit 12. The device works as follows. . . . Counterbalance sample 1 is rolled in on rollers 2; into receiving channel 3 up to stop 4. Sample 1 acts on weighing bearings 5 and 6 with forces P and RZ, the sum of which represents the weight P of sample 1. Sign of the distance between the supports and the center In terms of equilibrium, you can get the formula for determining the length of the control sample 1 -2 (+ A). Substituting the obtained relation (1) into the expression for determining the coefficient of use of the field of the negative tolerance, we obtain K.5f; -5o weight per meter of product. In case if the stop 4 is combined with the axis of the nearest support b to it, then formula (1) takes the form and formula (2) H The last expression is convenient for determining the theoretical weight v-v - - - -vvfe. where Ro / p is the physical weight; Mll is a predicted multiplier that is different for different products. Claims. The method of determining the length and / or coefficient of use of the floor of the minus tolerance of long items, which consists in moving the control sample all the way, weighing it, determining the length and (or), calculating the use factor of the floor of the minus tolerance, characterized in that In order to simplify and improve accuracy, the control sample is weighed using two weight measuring pPoRs with a base distance B between them, located on opposite sides of the center of gravity of the control sample, and the length of the last follow the formula, 2 (A). where B is the distance between the weighing props; A is the distance from the stop to the nearest support; R - the force in the far relative to the emphasis weighing support; The weight of the sample, equal to the sum of the efforts in both weight-measuring supports, and the coefficient of use of the floor of the minus tolerance are calculated by the formula. . K - PH-DO - р de Р, c - nominal weight of a meter of product. Sources of information, rintye taken into account in the examination 1. USSR author's certificate 411311, cl. G 01 G 23/36, 1971. 2. Technological instructions I-SP-14-76, TI-SP-15-76 for mill 300/2 Chel bmetzavod, 1975 (prototype) Ljl - 01 С j С) О G 1  IP U,