Evaluation of the influence of different clamping chuck types on energy consumption, tool wear and surface qualities in milling operations

Thorenz, Benjamin; Westermann, Hans-Henrik; Kafara, Markus; Nützel, Marina; Steinhilper, Rolf

doi:10.1016/j.promfg.2018.02.158

Cited by 8 publications

(4 citation statements)

References 1 publication

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“…As a result, the proposed approach makes it possible to create ACM with the necessary qualitatively new performance characteristics for given operating conditions or expand technological capabilities. Unlike the studies [1,3,6] aimed at identifying the relationship between the design features of clamping cartridges and the influence of centrifugal forces on the efficiency of clamping, this work suggests considering other aspects as well. In particular, for the same purpose, the work takes into account the suitability of the functioning of energy converters in the ACM drive for operation at high speeds.…”

Section: Discussion Of the Results Of Research On The Design Of Clamp...mentioning

confidence: 99%

“…The vast majority of scientific works on ACM are devoted to the possibilities of improving the operating characteristics of individual ACM components, in particular, clamping chucks. For example, in [1], the impact of the design of clamping chucks on the characteristics of the machining process in the context of sustainable production was investigated, but no approaches were proposed for improving their characteristics. In [2], the kinematic characteristics of the designs of object clamping mechanisms in form-closure technological equipment were considered.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Creation of automatic clamping mechanisms for spindle assemblies of machine tools using a formalized description of structural elements

Prydalnyi

2022

EEJET

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The characteristics of the functioning of automatic mechanisms for clamping workpieces and cylindrical tools in the spindle assemblies of metalworking machines determine the potential for improving the productivity and quality of processing. The conducted research is aimed at developing new approaches to the creation of automatic clamping mechanisms with qualitatively new and necessary characteristics of their functioning. The formation of new characteristics is achieved by implementing appropriate changes at the structural level of an object. The results obtained provide better opportunities for the development of structures of automatic clamping mechanisms by improving the systematization of a review of an increased number of alternative options for their structural elements. This was achieved by solving the problem of formal description and representation of structural elements operating on the basis of various physical effects within one subject area of the systematization matrix. The results allow strengthening the heuristic potential in the design and involving an extended range of physical effects suitable for effective energy transfer and conversion in the operating conditions of automatic clamping mechanisms. The possibility of describing structural elements as digital codes helps to increase the efficiency of analysis and processing of information of the initial design stages. Using the codes of the selected structural elements, three sequences corresponding to the structures of automatic clamping mechanisms according to the brief descriptions [1.7–2.4]–(1.1–2.3); [1.7–2.6]–(1.1–2.3); [1.7–2.6+1.6/1.7–2.1]–(1.1–2.3) were compiled. On their basis, designs of automatic clamping mechanisms with predictably better characteristics and extended technological capabilities are developed

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Section: Discussion Of the Results Of Research On The Design Of Clamp...mentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Creation of automatic clamping mechanisms for spindle assemblies of machine tools using a formalized description of structural elements

Prydalnyi

2022

EEJET

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“…The dynamic model of the clamping mechanism is presented in [5] as a lumped parameter system of rigid bodies connected by elastic and dissipative links. The article [6] examines the influence of different clamping chucks on energy consumption parameters and focuses on essential sustainability indicators in machining. The paper [7] deals with kinematic designing clamping mechanism with reciprocating linear motion and dead-position closed positions.…”

Section: Literature Reviewmentioning

confidence: 99%

Mathematical Model of the Tensioning in the Collet Clamping Mechanism with the Rotary Movable Input Link on Spindle Units

Prydalnyi

Sulym

2021

JES

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Increasing machining productivity causes the cutting forces acting on tools or workpieces to grow and requires extra clamping forces for their fixation reliably. In the research, a mathematical model of the operation of the clamping mechanism for fixating cylindrical objects on the spindle of machine tools at the stage of tension is presented. The presented design of the mechanism contains screw gear and provides self-braking. Based on the calculation model, mathematical dependencies are developed to describe the relationship among the movements of the parts of the mechanism when clamping forces are growing. The presented analytical dependencies allow considering the stage of growing clamping forces separately when the conservative type of forces are prevailing in the mechanism’s operation. That stage of work when both types of forces of dissipative and potential characters exist is considered. The developed dependencies describe the position of parts of the clamping mechanism depending on the generalized coordinate. The angle of rotation of the input rotating link is used as the generalized coordinate. This fact allows calculating the position of the elements of the clamping mechanism of this type depending on time. Results of the research enhance understanding the pattern of the change in the interaction of the elements and forces that act in the mechanism during the final stage of clamping. The obtained mathematical dependencies are a precondition for the development of design methodology for mechanisms of this type.

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“…However, in order to improve the surface quality during the face milling process, it is more important to optimize the mounting pattern of the workpiece on the machine table based on the structure of variable stiffness 14 . Also, various workpiece holders can affect energy consumption, tool wear, and surface quality in milling operations 15 . For example, increasing the stiffness of the spindle system in the direction of the feed rate can effectively improve the stability in the up-milling process, while the opposite is true in the down-milling process 16 .…”

Section: Introductionmentioning

confidence: 99%

A Method of Predicting The Best Conditions for Clamping a Large-Size Workpiece in Order To Reduce Vibrations in The Milling Process

Kaliński

Stawicka-Morawska

Galewski

et al. 2021

Preprint

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The paper presents an innovative method of solving the problem of vibration suppression during milling of large-size details. It consists in searching for the best conditions for clamping the workpiece based on a rapid modal identification of the dominant natural frequencies only and requires repetitive changes in the tightening torque of the clamping screws. Then, by estimating the minimum work of the cutting forces acting in the direction of the width of the cutting layer, it is possible to predict the best fixing of the workpiece. Application of the method does not require the creation and identification of a computational model of the process or preliminary numerical simulations. The effectiveness of this method was confirmed by the evaluation of the Root Mean Square (RMS) of the vibration level in the time domain observed during the actual face milling process.

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Evaluation of the influence of different clamping chuck types on energy consumption, tool wear and surface qualities in milling operations

Cited by 8 publications

References 1 publication

Creation of automatic clamping mechanisms for spindle assemblies of machine tools using a formalized description of structural elements

Creation of automatic clamping mechanisms for spindle assemblies of machine tools using a formalized description of structural elements

Mathematical Model of the Tensioning in the Collet Clamping Mechanism with the Rotary Movable Input Link on Spindle Units

A Method of Predicting The Best Conditions for Clamping a Large-Size Workpiece in Order To Reduce Vibrations in The Milling Process

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