Modernization of the System for Measuring Cutting Forces on the Basis of UDM Dynamometer Series

Samoylov, V.B.

doi:10.18698/0236-3941-2019-5-91-103

HoBMSTU.SME

2019

DOI: 10.18698/0236-3941-2019-5-91-103

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Modernization of the System for Measuring Cutting Forces on the Basis of UDM Dynamometer Series

V.B. Samoylov

Abstract: МГТУ им. Н.Э. Баумана, Москва, Российская Федерация Аннотация Ключевые слова Выполнен анализ существующих систем измерения сил при механической обработке деталей на металлорежущих станках, рассмотрены варианты применения в качестве измерительных преобразователей как специализированных готовых решений, так и динамометрических головок серии УДМ. Показаны недостатки известных схемотехнических решений по модернизации этих динамометров, связанные с необходимостью применения разнородных комплектов усилительной и пре… Show more

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Cited by 3 publications

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Investigation of Cutting Forces for Thin Layers when Planing and Milling

et al. 2021

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The problem of machining structural elements with removal of metal layers with thickness less than 0.01 mm by carbide tools, when the conditional radius of the blade rounding is less than or equal to the thickness of the cut layer, is considered. These cutting conditions can be considered constricted which requires research into cutting forces and chip shape. The problem of recording and measuring small cutting forces arising during blade machining of small grooves that serve for gas drainage in the manufacture of rubber products is solved. To measure forces, a lever fixed in a universal dynamometer, which has a supporting support with small friction, is used. Value of force moment measured with dynamometer can be used for optimization of cutting conditions, selection of tool geometry when processing small relief elements. Dependences of lever system cutting forces and displacements on the use of lubricant-cooling liquids, values of front angles during planing and milling with small-size tools are investigated. Experimental discrepancies between theoretical calculations of cutting forces according to classical and modern reference data and fixed results with the use of cutting liquids during cutting with small values of feed for carbide tools are found

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Investigation of Cutting Forces for Thin Layers when Planing and Milling

et al. 2021

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Cutting force measurement during machining of the ceramic parts designed for aviation purposes

Timokhin,

Anashkina,

Kharakhonov

et al. 2023

PoHEI.MB

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The cutting force is an important parameter in control and management of the machining processes. A system for measuring and registering the cutting forces in the process of machining the complex profile ceramic parts for aviation purposes was designed, developed and tested making it possible to measure with reference to the machined area height (to the Z coordinate) on the existing numerical control system. KF5P1-5-200 strain gauges with a full-bridge connection scheme were selected as the deformation sensors. Deformation of the grinding spindle body of a special machine with the SA950S30F4K.01 numerical control exposed to action of the cutting force radial component was assessed, and the zone of maximum stresses was determined, where the strain gauges were installed. The system was calibrated to measure the cutting forces using the developed power frame and the reference dynamometer. Software was created that makes it possible to register and analyze the data obtained, as well as to visualize the process of measuring the cutting forces in real time during the ceramic parts machining. Based on the results of testing the developed system and software, the possibility was established to measure the cutting forces during machining the complex profile ceramic parts, to visualize, register and print the results. Such a system could be used in the scientific research laboratories and pilot production in the ceramic parts machining.

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Dynamometric cutting tool

Svinin,

Ushakov,

Tikhonov

et al. 2023

jour

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The aim was to develop, manufacture and test a technically simple dynamometer for monitoring the cutting process during boring and turning. An S20R-SSSCR09 right-hand cutter was selected as a research object. To register the cutting force and vibration movements of the cutter tip in tangential and radial directions, the cutter was equipped with four KF5P1-10-400-A-12 strain gauges mounted according to a half-bridge scheme. The bending stiffness of the cutter in two directions was measured by a DOU-3-01 compression dynamometer and a DDP-10A dial indicator. The cutter natural frequency was determined by a vibrogram of damped bending vibrations. The dynamometric boring tool was tested on a DMG NEF 400 turning machine by turning a workpiece made of 20X steel, 79 mm in diameter with a 200 mm extension, at a spindle rotational frequency of 600 r/min, a cutting depth of 0.8 mm and a longitudinal feed of 0.103 mm/turn. According to the conducted review of modern turning dynamometers and their designs, strain gauging of cutting tools is the simplest technical solution when carrying out boring procedures. The bending stiffness of the cutter in tangential and radial directions comprised 0.6 and 1.058 N/μm, respectively. The conversion coefficients for displacements in these directions were 3.5 and 4.2 μm/V, respectively. The mutual influence of registration of radial on tangential and tangential on radial displacements was 7.7% and 2.8%, respectively. The obtained vibrograms showed that the turning process under the given machining conditions is accompanied by distinct auto-oscillations of the cutter with a frequency of 561 Hz. Therefore, strain gauging of cutting tools provides information in the form of vibrograms about the two most important parameters of the cutting process dynamics – force and vibration displacements. The main advantages of the presented dynamometric cutting tool include its design simplicity, possibility of manufacturing in laboratory conditions, low cost and insensitivity to temperature and axial feed force variations.

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Modernization of the System for Measuring Cutting Forces on the Basis of UDM Dynamometer Series

Cited by 3 publications

References 3 publications

Investigation of Cutting Forces for Thin Layers when Planing and Milling

Investigation of Cutting Forces for Thin Layers when Planing and Milling

Cutting force measurement during machining of the ceramic parts designed for aviation purposes

Dynamometric cutting tool

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