A precision thread pressure ring torque-pretightening force mapping relationship measurement device

Abstract

The invention discloses a torque-pretightening force mapping relation measuring device for an accurate thread clamping ring. The lower end of an S type high precision sensor is fixed to a base, and the upper end is fixedly connected to the lower end of a spherical contact connecting assembly. The upper end of the spherical contact connecting assembly is provided with a spherical plate, which is connected to a simulative lens. The spherical contact connecting assembly is used for limiting the pretightening force applied on the simulative lens, enabling the pretightening force to vertically effect on the S type high precision sensor. A linear type spacing assembly is fixedly connected to the base, and is fixedly connected to the spherical contact connecting assembly through a bearing. The linear type spacing assembly is used for limiting the rotation of the spherical contact connecting assembly. The thread clamping ring nut assembly can be replaced to match with and be fixed to the linear spacing assembly, so that the thread clamping ring can be fixed to the upper part of the simulative lens. The device is convenient to operation and high in precision.

Description

technical field [0001] The invention belongs to the field of precision instruments, and in particular relates to a precise measurement device for the torque-pretightening force mapping relationship of a thread pressure ring. Background technique [0002] With the continuous increase in the precision and stability of precision instruments in aviation, spaceflight, military and medical treatment, the task of improving the precision and stability of precision instruments is imminent. In precision optical instruments, threaded pressure rings are widely used in the fixing of optical lenses due to their considerable connection force and easy disassembly. Accurately obtaining the torque-preload mapping relationship of the threaded pressure ring is of great significance for improving the precision of precision optical instruments and the stability of the optical axis. [0003] The threaded pressure ring is a part used to compress and fix the optical lens in precision optical instru...

AI Technical Summary

Problems solved by technology

However, these methods are not applicable to the measurement of the torque-pretightening force mapping relationship of the threaded pressure ring. Although the theoretical accuracy of the strain gauge method is relatively high, due to the complicated operation, the sticking quality of the strain gauge affects the final measurement accuracy, so This method is mainly suitable for experimental research in the laboratory and is not suitable for engineering applications

The ultrasonic method has high measurement accuracy, but the disadvantage is that it has specific requirements for the structure and processing of the test bolts, which is obviously not suitable for threaded pressure rings

At present, the torsion sensor measurement device based on the bolted connection of large mechanical products such as ships and vehicles is not suitable for the measurement of threaded pressure rings.

Images