Experimental apparatus for accurately measuring characteristic parameters of tool holder-main shaft combined part

Abstract

An experimental apparatus for accurately measuring the characteristic parameters of a tool holder-main shaft combined part comprises a main shaft, a main shaft end cover, a preloaded bolt, a blind rivet with an elongated connecting rod and a tool holder. The blind rivet is connected to the tool holder, and fixed to the main shaft end cover at the tail end of the main shaft through the elongated connecting rod and by means of the preloaded bolt; the torque of a torque spanner is adjusted and a foil gauge in the preloaded bolt displays the present preload on a computer through a strain gauge; therefore, the acting force or broaching force between the tool holder and the main shaft is adjusted. The tool holder, the main shaft and the tool holder-main shaft system are tested, respectively, so that the characteristic parameters of the tool holder-main shaft combined part are identified without introducing excessive errors; and the apparatus offers the basis of the prediction of cutting stability and the structure optimization of the tool holder.

Description

technical field [0001] The invention relates to an experimental device for accurately measuring the characteristic parameters of the tool handle-spindle joint, which can accurately obtain the characteristic parameters of the tool handle-spindle joint under different broaching forces, and belongs to mechanical design, manufacture and testing field. Background technique [0002] The identification process of the characteristic parameters of the tool holder-spindle joint mainly has the following methods: [0003] It is considered to complete the identification process of the characteristic parameters of the tool holder-spindle joint on the whole machine or the test bench. In both methods, the frequency response function between the joint point of the tool holder and the spindle on the tool holder structure before assembly and the tool holder should be measured first. The frequency response function between the end excitation point and the joint point of the tool handle, and th...

AI Technical Summary

Problems solved by technology

Although these two methods can identify the characteristic parameters of the tool holder-spindle joint, the frequency response function between the joint point of the main shaft and the tool handle on the spindle before assembly, and the frequency response function between the vibration points of the tool holder after assembly Due to the influence of factors such as the motor, servo device, cooling system and other joints, the identification result has a large error and cannot accurately reflect the real connection situation.

Images