Using pre-processing and indenting of contact interface to improve fixture clamping efficiency

Vukelić, Djordje; Tadić, Branko; Bogdanovic, Bojan; Todorovič, P.

doi:10.1007/s00170-019-03845-5

Cited by 4 publications

(1 citation statement)

References 44 publications

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“…The results of this research showed that the amount of compliance of the system is much smaller than the amount of compliance caused by the dynamics of the workpiece. In another research, 24 based on the amount of indenting of the clamp components into the workpiece, clamps with ring shaped heads were designed. By using these clamps, the researchers found that the contact area between the workpiece and the clamps undergoes micro-cutting.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the stability and contact stiffness of workpiece inside fixture in different machining conditions

Sohrabifard

Nategh

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The dynamic stability of machining processes is influenced by the dynamic stability of the workpiece and fixture assembly. This effect has not yet been sufficiently considered. Achieving dynamic stability by simply applying a large amount of clamping force is a basic method and involves damages such as elastic deformation of relatively thin workpieces, damage to the clamping surfaces, and high wear of fixture components resulting in malfunction. In spite of this, to the best knowledge of the present authors, the contact stiffness between workpiece and fixture as an influencing parameter has not been sufficiently paid attention by researchers and these parameters have not been taken into account in the equations of dynamic stability. The contact stiffness itself is influenced by the machining parameters. In the present study, the changes in contact stiffness in different machining conditions are investigated as a partial undertaking to fill the gap existing in the modeling of the machining dynamics. In this paper, by defining the mathematical model of the workpiece-fixture system and calculating the matrices of contact stiffness and fixture stiffness, the results of changes in various machining parameters in the stiffness of the workpiece-fixture system have been investigated. The results showed that high contact stiffness cannot be provided simply by applying the maximum force of the clamps. Rather, by increasing the spindle speed, the contact stiffness will increase significantly. Furthermore, by increasing the spindle speed, further increase in the contact stiffness will be achieved with lower feed rates, which will not be economically viable.

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Section: Introductionmentioning

confidence: 99%

Investigation of the stability and contact stiffness of workpiece inside fixture in different machining conditions

Sohrabifard

Nategh

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Uncertainty in the determination of elastic modulus by tensile testing

Kostic

Miljojković

Šimunović

et al. 2022

Engineering Science and Technology, an International Journal

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Design of Bacteria Bottle Clamping Elements Based on Regression Models

Gao

Song

Ding

et al. 2020

Journal of Mathematics

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The fixture design of the bacteria bottle plays a vital role in designing a bottled fungus picking robot to save labor cost in the picking process of bottled fungus. This paper proposed a kind of clamping element design method based on regression models. Several sets of clamping elements were designed according to the appearance data of bacteria bottle. A single-factor test was conducted by using these clamping elements, and three levels of every factor were selected to obtain the desired values of clamping elements. Then, a Box–Behnken test was performed by selected levels. The established regression models described a numeric relationship between the variation of vital measurement points and all variation sources under a precise clamping element layout. To solve the problems in obtaining the direct parameters, a response surface method was presented based on the regression models. Finally, a test was used to demonstrate the effect of the optimized clamping elements when clamping a bacteria bottle. Through the related analysis and optimization, it was demonstrated that the holding effect of the clamping elements was the best under these conditions: the inner arc area was 4948 mm2; the downward displacement was 1.48 mm; and the rubber thickness was 3.69 mm. It showed that the proposed method was feasible, and the assembly quality after optimizing had been greatly improved. It can provide a reference for designing the bottle fixture of a picking machine.

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Using pre-processing and indenting of contact interface to improve fixture clamping efficiency

Cited by 4 publications

References 44 publications

Investigation of the stability and contact stiffness of workpiece inside fixture in different machining conditions

Investigation of the stability and contact stiffness of workpiece inside fixture in different machining conditions

Uncertainty in the determination of elastic modulus by tensile testing

Design of Bacteria Bottle Clamping Elements Based on Regression Models

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