Testing device and method for extracting drilling torque signals in real time

Abstract

The invention discloses a testing device and method for extracting drilling torque signals in real time. The testing device comprises a bone block clamping device; a drilling bit is located above a clamping region of the bone block clamping device in a matched manner; the bone block clamping device is fixed on a stepped shaft; the bottom of the stepped shaft is connected with a torque sensor; the bottom of the torque sensor is fixed at the center of a supporting plate; and two sides of the torque sensor are both provided with a supporting upright column of which the bottom is fixed on the supporting plate; an upper plate is supported by the top portions of the supporting upright columns; a stepped hole is formed at the center of the upper plate; a bearing is arranged in the stepped hole; the stepped shaft is used for transferring an axial force and a radial force generated during drilling; the geometrical shape of the stepped shaft is simple; the lower portion of the stepped shaft is directly connected with the clamping groove of the torque sensor, and therefore, the testing device is suitable for static torque measurement, is low in processing cost and can satisfy test requirements; the bearing bears the axial force and the radial force, and the axial force and the radial force are transferred to a work bench through the upper plate and the supporting upright columns; and the bearing cannot only bear great radial forces, but also bear axial forces, and friction is small, and therefore, measurement error is lowered to a certain extent.

Description

technical field [0001] The invention relates to a test device, in particular to a test device and method for extracting drilling torque signals in real time, in particular to a torque test device and method for separating axial force and radial force and monitoring the torque in real time. Background technique [0002] As we all know, teeth are an important part of the human body, and they cannot repair and regenerate themselves after they are lost. Clinically, the main repair methods for missing dentition include removable partial dentures, fixed partial dentures and implant dentures. Implant denture restoration combines the advantages of the first two methods and has become a conventional oral restoration technique. It refers to rebuilding the "root" in the edentulous area of ​​the patient through implant surgery, and then rebuilding the "root" on the alveolar ridge in the edentulous area. Teeth", and finally design a retainer on the jaw arch. Traditional implant denture...

AI Technical Summary

Problems solved by technology

The torque error calculated by the first method is relatively large; while the finite element analysis largely depends on the established material constitutive model, due to the particularity of bone materials, it is difficult to establish a bone constitutive model consistent with the actual situation, so The finite element analysis has certain limitations; the third method is more commonly used, but the axial force, radial force and circumferential force are generated simultaneously during the bone drilling process, and the circumferential force causes the torsional deformation of the test bone sample to form a torque

The axial force and radial force act on the torque sensor through the bone sample, causing it to produce compression deformation and bending deformation, which affects the accurate extraction of the torque signal and causes a large error in the measurement result; in addition, the traditional cutting torque sensor has a large range , high cost, and generally measure dynamic torque, which needs to be installed on the spindle of the machine tool, and the doctor uses a hand-held electric drill during dental implant surgery, and the torque generated is relatively small. Therefore, when using a torque sensor, a small-range special static torque sensor

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