SU1234747A1 - Apparatus for compression testing of abrasive grains - Google Patents

Abstract

The invention relates to a testing technique, can be used to test abrasive grains in compression, and allows to expand the range of applied loads with high accuracy of their measurement. The force created by the energizer, interacting with one lever arm and mounted to move along it, through the plunger, interacting with the same lever arm, is transmitted to the test grain and through the lever to a strain gauge mounted to move along the second lever arm. The signal from the load cell, proportional to the applied load, is fed to the information processing and indication unit. 1 il. About WITH Jiii «i 4

Description

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The invention relates to a testing technique and can be used to test abrasive grains in compression.

The goal of the invention is to expand the range of the applied efforts and increase the accuracy of their measurement.

The drawing shows a diagram of the proposed device.

The device contains two pressure plates t and 2, designed to place between them the tested grain 3,, a pusher 4 connected to the plate 2, a lever 5 interacting with one limb, a force-exciter 6, an interaction with the same lever 5 and installed movable along it, successively installed control unit 7 associated with a driver-activator 6, information processing and indication unit 8 and a strain gauge 9, a guide 10 and a microscope 11. The strain gauge 9 interacts with the second lever arm 5 and y tanovlen movable therealong by the guide 10.

The device works as follows.

The test grain 3 is placed between plates 1 and 2. The control unit 7 is turned on, which forces the exciter 6. The force generated through the push rod 4 is transmitted to the test grain 3 and through the lever 5 to the strain gauge 9. The signal from the strain gauge 9, proportional to the applied load, arrives at block 8 of information processing and indication. At the time of the destruction of grain 3, there is a sharp increase in the signal from the strain gauge 9, which

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fixed by the information processing and display unit 8. In this case, the control unit 7 stops the exciter 6, and the value of the breaking load is fixed on the display of the information processing and indication unit 8. Visual monitoring of the process of destroying the grain 3 is carried out using a microscope 11, Changing the point of application of force 6 force to one of the arms of lever 5 and moving the strain gauge 9 along the other arm of lever 5 along the guide 10 efforts with high accuracy of their measurement.

Formula inventions

20 A device for testing abrasive grains in compression, containing two pressure plates designed to place the test grain between them, a pusher connected to one of them, a lever interacting with it with one of its shoulders, a force actuator interacting with the lever, and successively installed a control unit associated with a powering system, an information processing and indication unit, and a charge meter, characterized in that, in order to broaden the range of applied forces and increase the accuracy of their measurement, meter is made in

the form of a strain gauge interacting with the second lever arm and mounted movably along it, and the exciter Q interacts with the first arm of the arm movably along it.

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PeAfKTop L.Avramenko

Compiled by M.Aziev Tehred M.Hodanich

2978/47

Circulation 778 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, ul. Project, 4

Proofreader A. Obruchar

Claims (1)

Claim 20 A device for testing abrasive grains for compression, containing two pressure plates designed to accommodate the test grain between them, a pusher connected to one of them, an arm interacting with one of its shoulders, a power exciter interacting with the lever, and a control unit connected in series with a force exciter30 body, an information and indication processing unit and a force meter, characterized in that, in order to expand the range of applied forces and increase the accuracy of their measurement, spruce configured as a load cell which interacts with a second lever arm and mounted for movement therealong, and energizer vzai4Q interacting with the first lever arm and mounted for movement therealong.