SU1357782A1 - Hardness-measuring device - Google Patents

Description

one

The invention relates to testing equipment, in particular to devices for measuring the hardness of materials.

The purpose of the invention is to increase reliability by eliminating distortions of the support sleeve.

FIG. 1 is a diagram of the device; FIG. 2 - indentor node.

The device includes a housing 1, an object table 2 placed therein and a displacement mechanism 3, an indenter 4 installed opposite the table 5, a indenter loading unit 6, an imprint depth gauge 7 connected to the last 7, a bearing sleeve 8 washer 9, an electromagnetic coupling 10, electric motor 11 and loads 12.

The device works as follows.

Using the mechanism 3, the subject table 2 rises and raises the rod 5 of the indenter 4 by 1.5-2 mm, creating a regime load. Using node 6

7

/ J n-

a preload is applied to the indenter 4. Then the preload is removed. The load remains, allowing the sleeve 8 to press against the tapered seat of the washer 9. The load sorting motor 11 includes an electromagnetic clutch 10 which fixes the support sleeve 8 in a position that represents the zero indentation depth reference base 4 fixed by an arrow on the meter 7. The sleeve 8 with the rod 5 of the indenter 4 is connected through the electrocontact sensor 13. Then the indenter 4 is loaded with the main load, and the meter 7 records the true depth of the indenter due to the deviation of the arrow from huddy position Since the support sleeve 8 is supported on the washer 9, its distortions due to irregularities of the test surface are excluded.

FIG. one

Editor V.Danko

Order 5989/41 Circulation 776 Subscription

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, Projecto st., 4

2

Compiled by I.Muzychkina

Tehred L. Serdyukova Proofreader M. Maksimishinets

Claims (1)

A HARDNESS MEASUREMENT DEVICE, comprising a body, an object table placed therein and a mechanism for moving it, an indenter with a rod opposite the table, an indenter loading unit, a finger depth gauge connected to the latter, and a j support sleeve covering the indenter and mounted with the possibility of their relative movement characterized in that, in order to increase reliability, it is equipped with a washer rigidly fixed to the housing, covering the rod and interacting with the support sleeve and electro-. a magnetic coupling associated with the depth gauge and interacting with the support sleeve. £ 00 sl m □ o N0