SU1411647A1 - Method and apparatus for determining adhesive property of materials - Google Patents

Abstract

The invention relates to a test technique, is intended to determine the stickiness of materials and allows to increase the accuracy of determination by ensuring continuous contact of the physical model with the test material. Physical tube 6 is made in the form of a semi-cylinder with a shank 7 in the center on a flat surface and a replaceable weight 8 placed on the shank 7. The test material sample is fixed on a flat base or on the cylindrical surface of the symbol 6. The master is reported to oscillate which are transmitted to the shoulder of the rocker arm of the holder 4 and the cantilever-mounted plate 15. The linear displacement signal of the plate 15, converted to electric, from the strain gauge 16 is fed to a self-feeding device. At least three consecutive amplitudes of damped oscillations of a man 6 are measured, starting with the initial deviation of the oscillator, and coefficients of viscous and dry training of a man 6 on the surface of the test material are determined, from which the stickiness of the test material is judged. 2 sec. and 2 z. p. f-ly, 2 ill. 1C (L

Description

C5 4

one

The invention relates to a testing technique, and specifically to methods for determining the stickiness of adhesive materials and devices for their implementation.

The aim of the invention is to improve the accuracy of determining the stickiness of materials by ensuring continuous contact of the physical model with the test material.

FIG. Figure 1 shows the scheme of the proposed device for implementing the method in a state of equilibrium of a stick; in fig. 2 - the same, when the deviation of the tambourine.

The device contains a base 1 with poles 2 and 3, holders 4 substrates of the test sample, made in the form of a rocker arm with a counterweight 5 and mounted with the possibility of oscillation on the rack 3 physical wand 6 in the form of a half-cylinder with a shank 7 in the center on a flat surface and replaceable weight 8 , mixed, on the shank 7, and meter 9 parameters of the oscillations of the 6, associated with the free arm of the rocker arm.

On the shoulder of the rocker arm, connected with the gauge 9, there are fixtures 10 of the specimen, 11 for interaction with the gauge, and an emphasis 12 for fixing the taller 6 in the initial position.

Clamps 13 are made on the flat surface of the tiller 6 to secure the specimen used 1Pz1, and the pins 14 on the lateral sides are designed to interact with the arm m 12.

The meter 9 of the parameters of oscillations of the tiller 6 is made in the form of a plate 15 mounted with a cantilever on a rack 3 with strain gauge sensors 16, the output of which is connected to a two-coordinate self-leveling PDM-021 M thermometer (not shown).

In addition, the support of the holder 4 is reflected in the rack 2, which reflects the oscillations of the holder 4, and on the base 1, the supports 18 are adjustable in height.

The method is carried out as follows.

Before each test of stickiness of materials, the device is calibrated, for which the horizontal position of the base 1 and d1, the holder 4 is checked, and, if necessary, the supports 18 and the balancing counterweight 5 bring their positions to horizontal. When measuring the stickiness of a material to a metallic surface, the test material is applied either on a cylindrical surface of a physical man 6 or on a substrate fixed to holder 4. When measuring the linkage of various materials: 1 test materials applied on the substrate , they are fixed with locks 10 and 13 on the holder 4 and the cylindrical surface of the optical mat 6. After

fixing the test material deflects the physical 6 from the equilibrium position before inserting the pins 14 into the stops 12. The measuring device is turned on and the physical master 6 is released. Under the action of the variable load 8 mounted on the shank 7, the letter b begins to roll over surface of the test material. When this holder 4, mounted on a rack 3, begins to oscillate and transmit

linear load through rod 11 to plate 15, and the converted signal of linear movement of plate 15 to the electrical signal from strain gauges 16 is fed to the meter-recorder

potentiometer.

The removal of the holder 4 from the equilibrium position is governed by the location of the empty load 8 on the shank 7 of the tandem 6 so that the holder 4 does not touch the reflector 17.

At least three consecutive amplitudes of Wo, YI Yz Yj of damped oscillations of a master 6 are measured, starting with its initial deviation, and the coefficient of viscous friction is calculated according to a formula:

Р 2t1n (y „- y) / (y, .CT) / T.

gdegp-mass.

K-coefficient of dry training of a t-shirt, K (-L- U2-4 ac) / 2aT;

oh, Zug -;

b Y; --Y --2y / -4y. (V, --Y.) -2y, (; - -Y.) + 2y ,. :

with 2Yo Y, Y, --- Y.f (Yo) + Y, (, -Y.) +);

XjV., -Sequential values of the amplitudes of damped oscillations, starting with the initial deviation of the symbol;

T is the oscillation period of the tambour; A (Y-Y. Y, 2v; KT 2y, KT + kch) / (-yy).

But the coefficients of viscous friction and dry friction K sh d t about stickiness of tested material.

Claims (4)

Invention Formula . The method of determination. The material properties by which the sample of the test material is subjected to oscillations by means of a physical body with a removable load, the parameters of the oscillations are measured and, according to their change, stickiness is judged, differing in that. the tamper is made in the form of a half-cylinder with a shank in the center on a flat surface and a load located on the shank, the sample is fixed on a flat substrate or on a cylindrical surface of a tick; and as a parameter, at least three consecutive amplitudes of damped oscillations are measured t-shirt and determine the coefficient of viscous friction and formula p 2mln () / (Yi) / T, where is the mass of the tomb; K-coefficient of dry friction K (-L-Vb -4ac) / 2aT; and woo-zu -Yu; B y2-y, 2-2u2-4y, (y, -y,) -2y, (-Y.) + 2y, i; C, Y,, (YO + Yi + YS) + Yi- (Y - Y.) + y, My –Y,); YcjYijYijY - consecutive values of the amplitudes of damped oscillations, starting from the initial otmotonotnika; T is the oscillation period of the tambour; A (Y / -Y, Y. -2УДТ + 2у, KT-f К Т) / / (2у, у „-у,). 0 five 2. The method for determining the stickiness of the material, containing a physical master with interchangeable weight, the substrate holder is tested against the sample and the measuring instrument of the speaker's tingle, characterized in that, in order to increase the accuracy of the determination, the physical master is made in the form of a half cylinder with a shank in zeltra on a flat surface and a load placed on the shank; the holder is designed as a rocker arm, one arm of which is connected to the gauge, and the other has a counterweight. 3. The device according to claim 2, characterized in that the sample fixers are installed on the cylindrical surface of the tambourine. 4. The device on c. 2, characterized by that on the shoulder of the rocker arm, connected with the gauge, the specimen clamps are made.