Problem of Technological Deformations of Thin-Walled Workpieces During Milling

Eremeykin, P. A.; Zhargalova, Ayagma; Gavriushin, Sergey S.

doi:10.17212/1994-6309-2019-21.3-17-27

Cited by 3 publications

(1 citation statement)

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“…Обеспечить работоспособность инструмента и параметры качества заготовок тонкостенных деталей возможно за счет назначения рационального режима обработки и шага зубьев фрезы, однако соответствующие рекомендации отсутствуют [3,4].…”

Section: Introductionunclassified

Investigation of mode elements effect and the influence of milling cutter teeth space on technological parameters and temperature field of work on a thin-walled parts workpiece

Unyanin,

Chudnov

2024

Science Intensive Technologies in Mechanical Engineering

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When machining workpieces of thin-walled parts, the temperature field differs from the field, which is formed during massive workpieces treatment. The reason for this is that machining of a thin-walled billet is interfered with its surface, being opposite to the one under machining. It has a significant effect on the temperature field, since the intensity of heat removal from this surface into the environment is significantly less than heat removal into the underlying layers of a massive material blank. In this regard, the problem of finding a rational mode of the machining process of thin-walled workpieces is relevant. The aim of the study is to determine the effects of the elements of the milling mode of thin-walled workpieces and milling cutter teeth space on the technological parameters of the milling process of titanium alloy workpieces and to develop recommendations for choosing this milling mode. For this purpose, a numerical modeling of the technological parameters of the milling process of blanks of massive workpieces and thin-walled parts made of titanium alloy, was performed experiencing various combinations of feed to the milling cutter tooth, cutting speed and milling cutter teeth space. When machining a thin-walled workpiece, due to less intense heat removal from the cutting zone into the workpiece, the temperatures in the areas of chip contact with the front surface of the tooth, the back surface of the tooth with the workpiece and the temperature of the workpiece itself are higher than when in a massive workpiece treatment. The patterns of changes in the parameters of the milling process of thin-walled workpieces depending on the feed, cutting speed and the milling cutter teeth space are established. With a larger tool stepover, the average and maximum temperatures in the areas of chip contact with the front surface of the tooth and the back surface of the tooth with the workpiece are lower in most of the combinations of mode elements used. Equations that establish the effect of feed on the milling cutter tooth, cutting speed and spacing of teeth on the parameters of the machining are obtained. The results of the study will allow choosing a rational milling mode and spacing of teeth in the work on workpieces of thin-walled parts made of titanium alloy.

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Section: Introductionunclassified

Investigation of mode elements effect and the influence of milling cutter teeth space on technological parameters and temperature field of work on a thin-walled parts workpiece

Unyanin,

Chudnov

2024

Science Intensive Technologies in Mechanical Engineering

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The influence of cutting mode elements on the technological parameters of the process of milling blanks of titanium alloy thin-walled parts

Unyanin,

Chudnov

2024

Frontier Materials & Technologies

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The purpose of a rational mechanical processing mode remains an urgent task of pre-production engineering. Known recommendations and methods for selecting this mode are focused on the processing of solid blanks and do not take into account the fact that when processing thin-walled blanks, the temperatures in the processing zone and the surface layer of the blank differ. The study is aimed at identifying patterns in changing the parameters of the milling process of thin-walled blanks depending on the mode elements, as well as developing recommendations for selecting this mode. The authors performed numerical simulation of technological parameters of the milling process of solid and thin-walled blanks made of titanium alloy under various modes. The cutting speed, cutting depth and feed per cutter tooth were varied. The cutting force, power and densities of heat sources and the temperature in the surface layer of the blank, in the contact zones of the cutter tooth with the blank and the chips with the front surface of the tooth were calculated. It has been found that when milling thin-walled blanks, the temperature field differs significantly from that formed when processing solid blanks due to low heat removal from the unprocessed surface. Increasing the feed per tooth by 45% leads to an insignificant decrease in temperatures in the cutting zone (by 5...12%). Increasing the cutting speed by 25%, on the contrary, leads to an increase in temperatures by 5...10%. Increasing the cutting depth leads to an increase in the temperature in the chip-tooth contact zone by 1.5times and to an increase in the temperature in the tooth-blank contact zone.

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