Modelling of Dynamic Compliance of Fixture/Workpiece Interface

Todorovič, P.; Vukelić, Djordje; Tadić, Branko; Veljković, Danijela

doi:10.2507/ijsimm13(1)5.254

Cited by 10 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Craig et al 28 developed a new design for fixtures that can be adapted to the surface of free-form parts by filling the space between locators with an arrangement of flexure pins. Todorovic et al 29 examined the compliance of the contact between the workpiece and the fixture elements using a one-dimensional model and Lagrange differential equations of motion. They calculated the displacement of the workpiece relative to the fixture elements.…”

Section: Introductionmentioning

confidence: 99%

Evaluation, calibration, and modal analysis for determination of contact stiffness between workpiece and components of milling fixture

Sohrabifard

Nategh

Ghazavi

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

The stability of workpiece inside fixture influences the dynamics of machining. Although, the workpiece is uniquely and deterministically positioned and grasped by the fixture, it undergoes small displacements due to the contact compliance resulting from the frictional slip under the external loads and vibrations. The frictional slip of workpiece, along or around the main axes relative to the fixture components is a major cause of instability and the main element influencing the contact stiffness between the workpiece and the fixture. In the present study, a procedure has been developed to evaluate the contact stiffness by employing mathematical and experimental tools. The grasp matrices defined in analytical model were obtained by a combination of calibration and measurement of forces, displacements, and friction coefficient. The contact stiffness was also determined by modal analysis of the assembly of workpiece and fixture and the results were compared. It was evidenced that the dry friction existing in the contact areas between the workpiece and fixture elements could lead to the stick-slip instability, detrimental to the dynamics of machining. The main contribution and novelty of the present study can be outlined, as follows. The contact stiffness between workpiece and fixture was modeled and measured. The frictional slip was modeled and measured in addition to the physical compliances. Dry friction between workpiece and fixture was detected as a source of stick-slip. Procedures were developed to calibrate and measure all forces and displacements. Modal analysis was done as a complementary tool to verify the results.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation, calibration, and modal analysis for determination of contact stiffness between workpiece and components of milling fixture

Sohrabifard

Nategh

Ghazavi

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

“…(Vukelic et al, 2011.). In order to bring the machining process to a higher level, all these elements must be optimized (Todorovic et al, 2014.). For smaller companies, especially those which are struggling to find an appropriate position on the market, optimizing their production processes is a necessity (Debevc & Herakovic, 2010).…”

Section: Introductionmentioning

confidence: 99%

Traceability of Machining Cutting Tools and Fixtures in the Production System Using the RFID Technology

Lazarević¹,

Ćosić²,

Vukelić³

et al. 2015

DAAAM International Scientific Book 2015

View full text Add to dashboard Cite

The purpose of this paper is to present possible aplication of RFID technology in traceability of machining cutting tools and fixtures. Aplication of RFID technology should provide easier and faster identification of machining cutting tools and fixtures in the production system. The paper presents the overall structure of aplied technology, description of particular system and subsystems and the structure and functioning of RFID technology for traceability of machining cutting tools and fixtures. In conclusion, at the end of paper, are analyzed the advantages and disadvantages of the system and suggested the directions of future research.

show abstract

“…During the process, clamping forces and torques are being transferred onto all other elements of the machining system. Within this load transfer chain, contact interfaces between workpiece and other system elements, most often represent the most sensitive link [7]. In general, all elements of machining system are required to have high stiffness, i.e., low compliance.…”

Section: Introductionmentioning

confidence: 99%

Increasing Stiffness of Constructions through Application of Enhancing Elements

et al. 2018

View full text Add to dashboard Cite

Presented in this work is a study on construction stiffness, based on examination of their neutral lines for various cross-section geometries and different force magnitudes. Investigations were conducted both through numerical simulations and experimentally. The results of numerical simulations indicate that stiffness enhancement reduces deflection in the range of 41-52 %, while the experimental tests showed the reduction of 42-54 %. Also reviewed is comparative analysis between the stiffness results obtained by numerical analyses and experiments, which showed high degree of their compliance. The deviations between the results offered by the two methods are 1-3 %, on average, while in the worst case, which occurs in just a couple of points, the deviation equals 10 %. This study revealed significant increase of element stiffness, which was obtained by employment of additional stiffness enhancing elements.

show abstract

Modelling of Dynamic Compliance of Fixture/Workpiece Interface

Cited by 10 publications

References 30 publications

Evaluation, calibration, and modal analysis for determination of contact stiffness between workpiece and components of milling fixture

Evaluation, calibration, and modal analysis for determination of contact stiffness between workpiece and components of milling fixture

Traceability of Machining Cutting Tools and Fixtures in the Production System Using the RFID Technology

Increasing Stiffness of Constructions through Application of Enhancing Elements

Contact Info

Product

Resources

About