US 2006/0130566 A1Published application

Hardness testing device

OwnerShaoming Wuinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

A hardness testing device includes an elongated guiding tube, a test member, an impact actuator, and a transducer. The elongated guiding member has a bottom impact opening for contacting with the work piece surface and a coil seat integrally provided on an outer circumferential surface of the guiding tube at a position close to the impact opening. The impact actuator is provided on an upper portion of the guiding tube for applying an impact force against the test member which is then driven to travel within the guiding tube at an impinging velocity and a rebound velocity. The transducer includes an electric coil coaxially wound on the coil seat, and is adapted to electromagnetically communicate with the test member for detecting the impinging velocity and the rebound velocity when the test member slidably passes through the coil seat so as to determine a hardness of the work piece surface.

Claims20

Dependent claims

A hardness testing device for measuring a hardness of a work piece surface, comprising:

an elongated guiding tube having a bottom impact opening for contacting with said work piece surface and a coil seat integrally provided on an outer circumferential surface of said guiding tube at a position close to said impact opening;
a test member slidably moving within said guiding tube;
an impact actuator provided on an upper portion of said guiding tube for applying an impact force against said test member such that said test member travels within said guiding tube at an impinging velocity before impacting with said work piece surface and at a rebound velocity after impacting with said work piece surface;
and
a transducer, which comprises:
an electric coil coaxially wound on said coil seat to minimize a clearance between said electric coil and said test member when said test member slidably passes through said coil seat, wherein said electric coil is adapted to electromagnetically communicate with said test member for detecting said impinging velocity and said rebound velocity of said test member when said test member slidably passing through said coil seat;
and
a hardness interpreter electrically connected with said electric coil for measuring a hardness of said work piece surface with respect to said impinging velocity and said rebound velocity.

5 more elements

A hardness test guider for a hardness testing device comprising a test member adapted for slidably moving within said hardness test guider at an impinging velocity and a rebound velocity, and a hardness interpreter which comprises a transducer, and an electric coil for being induced a predetermined electrical current corresponding with said impinging velocity and said rebound velocity, wherein said hardness test guider comprises:

an elongated guiding tube having a bottom impact opening for contacting with a workpiece surface, wherein said test member is allowed to slidably move along said guiding tube to impinge on said work piece surface at said impinging velocity and rebound at said rebound velocity;
and
a coil seat integrally provided on an outer circumferential surface of said guiding tube for supporting said electric coil of said transducer at a position close to said impact opening, such that when said test member slidably passes through said coil seat at said impinging velocity and rebounds at said rebound velocity in said guiding tube, said electric current is induced at said electric coil for detecting said hardness of said work piece surface.

Dependencies are inferred from the claim text.