SU4081A1 - A device for testing the mechanical properties of materials by drilling - Google Patents

Description

The present invention aims to quickly determine by drilling the mechanical properties of materials (hardness, viscosity or moisture).

In FIG. 1 is a front view of the device and a longitudinal section; and FIG. 2 - the same with the use of gears to rotate the drill.

A screw drill 2 is connected between guide / (fig. 1) with pointed ends 21, with which the device rests against the material under study, connected by coupling 4 to rod 5 entering tube 5. The latter can move along rod 3, which is equipped with pin 7 in the slot in the tube 5, whereby the tube 5 rotates with the rod. With tube 5 bonded with a sprocket 8, a coupling 9, which can move axially, and in which a drill 10, which is under pressure of a spring 12, abutting one end against the collar 9, is fixed with a nut 10

and the other, into the holder 18. In the latter, guides I are secured, covered at the top of the yoke 17, and at the bottom a yoke / 9 fixed by the pins 22. On one of the guides is placed a scale 16 with divisions along which the stroke m of the clutch 14 is fixed pressure screws 15.

The handling of the instrument is as follows. The device is taken with the left hand by the handle 23 and pressed with pointed tips on the test material 20; being under spring pressure of -72, depending on the area of the test area, the drill will protrude from the casing 19 by a certain amount, and this initial position of the drill is marked on the scale 16 by the clutch 14 fixed by the clamping screw 35. When the drilling needs to be stopped, The second clutch, not removing the drill bit, is pushed all the way into the collar / 3 and secured with a screw 15, after which, taking into the device, it looks at how many graduations of the scale have been passed (or as the drilling depth); when

want to drill at a set depth, the second clutch is installed after the first clutch is installed before drilling starts; having thus established the drill, they begin to work with it in the usual way at a speed of 150 movements of the drill nut in one direction per minute.

The results of the definitions are compared with the data of an expertly compiled table.

FIG. 2 shows a device that differs from that described above in that a bevel gear 19, 20 is used to rotate the drill in one direction and with greater speed. The bevel gear 20 is fixed on an axis 21 passing through a hole in the rack / and fitted at one end knob 25 for rotation, and on the other end fixed or with a bolt or knob 22. The latter can be replaced with a knob 24 with a washer 25 protecting the arm from being damaged by the gear wheel 20.

The subject of the patent.

A device for testing the mechanical properties of materials by drilling, characterized by supplying the axis of the drilling machine (drill or the like) with an axially movable coupling 9 (Fig. 1 and 2) for the drill //, under pressure of the spring 12 (Fig. 1 ) or 15 (Fig. 2), which parts are located between the two guides / (Fig. 1) or 2 (Fig. 2) attached to the machine and pointed at the bottom (7) (3) or 3 (Fig. 1) 2), of which guides one is equipped with a scale 16 (Fig. 1) or 18 (Fig. 2) with divisions and mobile closures l emymi respective couplings with screws 14 (FIG. 1) or 16 (FIG. 2).

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