RU2013100509A - METHOD OF EFFECTIVE FULL PROFILE MECHANICAL TREATMENT OF RAILWAYS - Google Patents
METHOD OF EFFECTIVE FULL PROFILE MECHANICAL TREATMENT OF RAILWAYS Download PDFInfo
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- RU2013100509A RU2013100509A RU2013100509/02A RU2013100509A RU2013100509A RU 2013100509 A RU2013100509 A RU 2013100509A RU 2013100509/02 A RU2013100509/02 A RU 2013100509/02A RU 2013100509 A RU2013100509 A RU 2013100509A RU 2013100509 A RU2013100509 A RU 2013100509A
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Abstract
Способ полнопрофильной механической обработки железнодорожных колес, включающий два рабочих движения: главное рабочее движение вращения и вспомогательное прямолинейное либо криволинейное, в зависимости от формы образующей профиля колеса, отличающийся тем, что расчет наиболее эффективных режимов резания для операции точения круглыми чашечными резцами осуществляют по соотношениям, учитывающим:- величину приращения температуры материала режущей части сверл ΔT в зависимости от физико-механических и теплофизических свойств обрабатываемого и режущего материалов, формы и размеров передней грани режущей пластины, характеристик точности инструмента, оборудования и технологической оснастки;- динамику процесса обработки, выраженную в количественном изменении фактической величины сечения удаляемой режущей кромкой стружки m и силы резания F;для чего вначале определяют величину возможного сечения стружки mв направлении подачи, при отсутствии самого движения подачи:m=δ,гдеδ - радиальное или осевое биение шпинделя детали станка, мм;затем находят максимальное значение сечения стружки m в этом направлении как сумму двух составляющих:m=δ+Sгде подачу на оборот детали S(мм/об) выбирают при удалении всего припуска за проход и в зависимости от минимизации силы резания F:F≥K·σ·m·t, кгс,гдеK - коэффициент внутреннего и внешнего трения (K=3,4);σ- предел прочности обрабатываемого материала, МПа;t- удаляемый за проход припуск, мм;далее по заданной величине m рассчитывают частоту вращения детали n по формуле:, об/мингдеА - постоянная физико-механических и теплофизических свойств обрабатываемого и режущего материалов (м/сек);d- диаметр рA method of full-profile machining of railway wheels, including two working movements: the main working rotation movement and the auxiliary rectilinear or curvilinear, depending on the shape of the forming profile of the wheel, characterized in that the calculation of the most effective cutting conditions for the operation of turning with circular cup cutters is carried out according to ratios that take into account : - the value of the temperature increment of the material of the cutting part of the drills ΔT depending on the physicomechanical and thermophysical properties of the processing material and cutting materials, the shape and size of the front edge of the cutting insert, the accuracy characteristics of the tool, equipment and technological equipment; - the dynamics of the processing process, expressed in a quantitative change in the actual cross-sectional value of the chip removed by the cutting edge m and cutting force F; for this, first determine the value of the possible the chip cross section m in the feed direction, in the absence of the feed movement itself: m = δ, where δ is the radial or axial runout of the spindle of the machine part, mm; then find the maximum cross section value chips m in this direction as the sum of two components: m = δ + S where the feed per part S (mm / rev) is selected when the entire allowance is removed per pass and depending on minimizing the cutting force F: F≥K · σ · m · t , kgf, where K is the coefficient of internal and external friction (K = 3.4); σ is the tensile strength of the processed material, MPa; t is the allowance removed during the passage, mm; then, using the given value of m, the rotational speed of the part n is calculated by the formula: rpmgdeA - constant physical and mechanical and thermophysical properties of the processed and cutting materials (m / s); d - diameter p
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RU2013100509/02A RU2013100509A (en) | 2013-01-09 | 2013-01-09 | METHOD OF EFFECTIVE FULL PROFILE MECHANICAL TREATMENT OF RAILWAYS |
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RU2013100509/02A RU2013100509A (en) | 2013-01-09 | 2013-01-09 | METHOD OF EFFECTIVE FULL PROFILE MECHANICAL TREATMENT OF RAILWAYS |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112756636A (en) * | 2020-12-29 | 2021-05-07 | 浙江金固股份有限公司 | Turning method for plate-shaped workpiece |
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- 2013-01-09 RU RU2013100509/02A patent/RU2013100509A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112756636A (en) * | 2020-12-29 | 2021-05-07 | 浙江金固股份有限公司 | Turning method for plate-shaped workpiece |
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Effective date: 20140702 |