JP2006250557A5 - - Google Patents

Claims (6)

By applying a load through contact with the workpiece, the displacement amount or these contact at that time, the hardness tester determines the hardness of the object to be measured, and contacts that contact the workpiece, the contact A spindle connected to a child, a contact force detector for detecting a contact force that the contact presses against the object to be measured, and the object to be measured disposed between the contact and the contact force detector . operation and position detector for detecting the displacement of the contacts, and a linear actuator for operating the contactor in the axial direction of the spindle, according to the output signal of the previous SL contact force detecting unit, the contact for And a control unit for maintaining a contact force between the contact and the object to be measured at a predetermined value.   2. The hardness meter according to claim 1, wherein an initial load is applied to the object to be measured via a contact, and the position of the contact at this time is used as a measurement reference.   The contact force detection unit has a thin plate with a strain gauge attached thereto and a support member that holds both ends of the thin plate, and the thin plate with the strain gauge attached thereto is fixed to the other end of the spindle, The support member is fixed to a movable shaft of the linear actuator, and configured to detect a contact force between the contact and the object to be measured based on strain data of the strain gauge. The hardness meter according to claim 1 or 2. The contact force detector includes a support member having a substantially C-shaped side surface and an opening, and a pair of metal plates fixed to both end faces of the opening. 2. The device according to claim 1, wherein the electrodes are arranged to face each other so as to maintain a gap, and a contact force between the contact and the object to be measured is detected based on a capacitance between the pair of metal plates. Or the hardness meter of Claim 2. Hardness tester of claim 1, wherein the bearing before kissing spindle is characterized in that it is a linear ball bearing system. Hardness tester of claim 1 wherein the previous SL contact, characterized in that removably attached to the spindle.