SU13600A1 - A device for determining the hardness of a graphite rod - Google Patents

Description

The present invention relates to instruments for determining the hardness of graphite rods.

In FIG. 1 schematically depicts a side view of the device, FIG. 2 - view it from above.

A device for determining the hardness of graphite rods consists of an unequal-arm rocker 8, supported by a socket on a steel prism 7 fixed to the rear wall of the device. The short arm of the rocker is retracted by the coil spring 6 to the instrument board, installed in a horizontal position with set screws 1. The long arm of the rocker arm carries the weight 4 with rollers to move it along the rocker arm and is equipped with a pressure arm 5, adjustable in height at help1, and a screw P. Cargo 4 has a vertical cut, in which a roller 9 handle is strengthened using a roller, which is movable along the slit and serves to move the load along the shoulder of the rocker arm. The handle 9 is provided with a pointer for reference on the scale 10 of the load position and is arranged movable along the slit so that the rocker does not experience the action of vertical forces when moving the load 4 along the rocker arms. On the table of the device there are two supporting posts 13, 13, on the Lto k.1 gadgets

test rod. The struts 18, 13 are set in a manner so that the pressing knife 5 passes through the middle distance between them. To determine this average position, a scale of 12 is used, fixed on the instrument table.

Before starting the testing of graphite rods, the device is installed with set screws I in a horizontal position. Then the load is placed on the zero division and the rocker is set in the horizontal position with the help of the spring 6. A test rod is placed on the supports, the diameter of which is to be measured with a micrometer screw. Pressing the knife with the help of the screw AND is lowered freely onto the lying graphite rod and the lot is fixed with this screw. If the dia: meter of the test rods is the same, the knife is set once for a given diameter, otherwise it is set for each diameter separately. After the implementation of these interactive load 4 with the aid of the handle 9, it gradually moves along the rocker arm, with a certain holding, until the rod lying on the on-pillars breaks. The division in which the load is stopped is observed, and the load sustained by the rod per 1 square meter is displayed in accordance with the measured shoulder. mm

Subject item

A device for determining the hardness of graphite rods, which is characterized by the use of a non-equal arm on the prism 7, whose short arm is pulled by the coil spring 6, and the long arm carrying a load 4 on the rollers on the rollers with a scale of 10, is equipped with a fixed scale the height of the pushing knife 5, which is intended for pressing on the test rod, stacked tincture 13, 13.

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