Damage prediction in the multistep forging process of subminiature screws

Kim, Jong-Bong; Seo, W.S.; Park, Keun

doi:10.1007/s12541-012-0212-2

Cited by 20 publications

(5 citation statements)

References 8 publications

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“…Xu et al [1] presented thermal error forecast and performance evaluation for an air cooled ball screw system. Kim et al [2] reported damage prediction in the multistep forging process of subminiature screws. A study in precision grinding of screw rotors using CBN wheel was proposed by Wei et al [3].…”

Section: Introductionmentioning

confidence: 99%

Pervasive Investigations of Critical Speed over Weight and Deflection Factors of Shaft Assembly in CNC Ball Screw System

Verma

Belokar

2016

International Journal of Manufacturing Engineering

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The demand for higher productivity requires machine tools to work on the adequate critical speed to have faster and more accurate ball screw system. Ball screw affects severely over the higher rotation speed of the shaft in computer numeric control (CNC) machining centers. This paper deals with an approach to calculate the initial critical speed of the shaft. Critical speed requires significant attention due to its major use in the manufacturing sectors. The impacts of weight on the critical speed of shaft assembly have been analyzed from theoretical as well as analytical investigations. Additionally, we evaluated the impact of weight on the deflection of the shafts along with failure analysis of shafts with respect to critical speed. Further, we computed the results for critical speed based factor to enhance the accuracy of CNC machining centers. Finally, the analytical estimations have been carried out to prove the validity of our proposal.

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Section: Introductionmentioning

confidence: 99%

Pervasive Investigations of Critical Speed over Weight and Deflection Factors of Shaft Assembly in CNC Ball Screw System

Verma

Belokar

2016

International Journal of Manufacturing Engineering

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“…Kim et al [ 105 ] devised a damage prediction method during forging of subminiature screws. Micro‐cracks and folding defects were predicted with the help of Cockcroft–Latham criterion and refining mesh method, respectively.…”

Section: Effect Of Input Parameters On the Surface Characteristics Of...mentioning

confidence: 99%

A Systematic Review of Factors Affecting the Process Parameters and Various Measurement Techniques in Forging Processes

Sharma

Gupta

et al. 2023

steel research int.

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Forging is a primary manufacturing process used in several manufacturing industries. Aircraft and automobile industries are manufacturing products with high‐dimensional accuracy and quality that are highly precise or near the required shape. Customers require products that are free of cracks and fulfill their functional requirements. This leads to the advancement of the forging process due to its ability to form complicated and intricate shapes. Herein, a detailed review of the aspects of forging is given in which the optimization of factors like preform design, forging conditions, workpiece dimensions, die design, lubricant properties, and thermal treatment parameters are discussed, enhancing the tool life and forging quality of the product. The selection of die‐forging tool material and methods for enhancing the surface quality of forged products are also reviewed. The article also presents methods for measurement of forging quality, tool life, machine effectiveness, forging image acquisition, and forging parameters, which can significantly reduce the risk of error at every step of the forging process. This review serves as a reference for researchers to increase production rate, enhance the effectiveness of measurement system, and improve the quality of forged products with technological advancement.

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“…Una tercera investigación es referente a tornillos sub-miniatura (diámetro < 3 mm) para unir productos electrónicos y mecanismos, los cuales han sido manufacturados mediante el proceso de forjado de cabeza, seguido de roscado por rodamiento. Encontraron micro-grietas generadas en la cabeza y este defecto perjudicial aumento donde más pequeño es el tornillo [6]. En último trabajo reportan tornillos de bola en acero 55CrMo con alto sobrecalentamiento por bobinas de inducción a 1200%C en las regiones de roscado provocando grietas a lo largo de límites de grano, falta de endurecimiento a 2.5 mm de espesor en dientes de rosca y granos gruesos [7].…”

Section: Química Hoy Chemistry Sciencesunclassified

Efecto del endurecimiento por deformación plástica sobre la microestructura en tornillos de acero SAE 1038 forjados en frio

et al. 2019

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Se analizó el efecto del endurecimiento por deformación plástica sobre la evolución microestructural y mecánica detornillos de acero SAE 1038 con diferentes pasos de forjado en frio, mediante microscopía óptica, mediciones denumero de tamaño de grano ASTM (G), alargamiento de grano promedio, exponente de endurecimiento pordeformación (n) y deformación plástica promedio. En el alambre recocido inicial se observó una microestructura conmatriz ferritica equiaxial de tamaño de grano mixto con presencia de partículas semi-redondas y alargadas distribuidasen bandas longitudinales y alternadas con dirección del estirado. Se encontró una evidente deformación plásticagradual conforme se aplicaron los pasos de forjado en frio (alambre enderezado, cuadro de cabeza, cabeza y roscado).La máxima deformación plástica (20% de reducción en longitud) genero una microestructura con distribucióndiferente y cambio de dirección a perpendicular de las bandas de partículas esferoidizadas, así como granos ferriticosdeformados y alargados cuantificados con el menor número de tamaño de grano (7.4 G) representando 15% dereducción, mayor aumento en alargamiento de granos promedio (108%) y mayor incremento del exponente n (396%).Todo lo anterior, se alcanzó en el cuerpo de cabeza forjada en frio asociado con el mayor endurecimiento pordeformación plástica permanente, seguido por el cuadro de cabeza y roscado, comparados con la microestructura librede deformación del alambre recocido inicial.

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Damage prediction in the multistep forging process of subminiature screws

Cited by 20 publications

References 8 publications

Pervasive Investigations of Critical Speed over Weight and Deflection Factors of Shaft Assembly in CNC Ball Screw System

Pervasive Investigations of Critical Speed over Weight and Deflection Factors of Shaft Assembly in CNC Ball Screw System

A Systematic Review of Factors Affecting the Process Parameters and Various Measurement Techniques in Forging Processes

Efecto del endurecimiento por deformación plástica sobre la microestructura en tornillos de acero SAE 1038 forjados en frio

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