Shearing clutch type hammering Brinell hardness tester for applying test force through impact hammer

Abstract

The invention discloses a shearing clutch type hammering Brinell hardness tester for applying test force through an impact hammer. The problems that each operation impact force is inconsistent, the measurement result is large in error and the applicable range is narrow since the impact force on a spherical pressure head is produced by the knocking of a hammer or the knocking of the knocking part;the hardness tester is characterized in that a trigger cylinder and a telescopic cylinder are arranged in an outer cylinder, an impact hammer is arranged in the telescopic cylinder; after a circular conical surface at a lower end of the trigger cylinder contacts an arc bevel of a trigger, the trigger rotates around a trigger shaft, a trigger hook head of the trigger breaks away from a low boss ofa trigger pothook, the impact hammer downwardly popups under the expansion force effect of a main spring to strike a spherical head of a pressure head seat; the pressure head produces a counter-actingforce for the impact force produced by the impact hammer to break the shearing clutch into three sections. The hardness tester disclosed by the invention reduces the labor intensity and the operationdifficulty, so that the operation is easier and safer, the impact force is consistent, the measurement precision is high, the measurement is more stable, and the applicable range is wide.

Description

technical field [0001] The invention belongs to the technical field of hardness testers, in particular to a shear pin type hammer Brinell hardness tester which applies a test force through an impact hammer. Background technique [0002] Hammer Brinell Hardness Tester is mainly used to test various large, assembled, uncut or inconvenient to move workpieces. It is generally used to test large and medium-sized castings, forgings, steel, non-ferrous metals and semi-finished workpieces that have been quenched and tempered. Typical The products include ordinary hammer Brinell hardness tester and shear pin type hammer Brinell hardness tester. Among them, the hardness testing principle of the shear pin hammer Brinell hardness tester is to use a hardened steel spherical indenter or a hard alloy spherical indenter to press into the surface of the sample with the corresponding test force. The impact force exerted by the head cuts off a specific diameter and vertical shear pin to achie...

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