scholarly journals Parallel, Serial and Hybrid Machine Tools and Robotics Structures: Comparative Study on Optimum Kinematic Designs

10.5772/33797 ◽  
2012 ◽  
Author(s):  
Khalifa H. ◽  
Kamal A.F. ◽  
A.M.M. Sharif ◽  
Salah Zenieh
Keyword(s):  
Comparative Study ◽  
Machine Tools ◽  
Hybrid Machine ◽  
And Robotics

A601 Comparative study of laparoscopy and robotics in revisional bariatric surgery – outcomes in 138 patients

2019 ◽  
Vol 15 (10) ◽  
pp. S248-S249
Author(s):  
Dimitar Ranev ◽  
Anam Pal ◽  
Jacqueline Duarte Fernandes ◽  
Filippo Filicori ◽  
Julio Teixeira
Keyword(s):  
Bariatric Surgery ◽  
Comparative Study ◽  
Revisional Bariatric Surgery ◽  
Surgery Outcomes ◽  
And Robotics

Kinematic Analysis of a Four Degreed-of-Freedoms Hybrid Machine Tool

2011 ◽  
Vol 204-210 ◽  
pp. 1651-1654
Author(s):  
Yan Fei Zhang ◽  
Jin Liang Gong ◽  
Xiu Ting Wei
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Parallel Machine ◽  
Spherical Joint ◽  
Kinematic Modeling ◽  
Hybrid Machine Tool ◽  
Hybrid Mechanism ◽  
Hybrid Machine ◽  
Position And Orientation ◽  
Parallel Machine Tool

On one hand, parallel machine tool enjoys many advantages over conventional serial counterpart, on the other hand, it also suffers from the disadvantages of coupled position and orientation, difficulty in kinematic modeling, strict requirements for components and difficulty in manufacturing of the spherical joint adopted in some limbs. Hybrid mechanism, however, will serve the turn in some cases. By using a three degree-of-freedoms parallel mechanism and a slide worktable which will fulfill one movement, a novel four degree-of-freedoms hybrid machine tool is put forward. The kinematic solutions are analyzed and closed-form kinematic solutions are given. The methods and theories adopted here can be used for design of other types of hybrid machine tools.

scholarly journals Latest Developments in Industrial Hybrid Machine Tools That Combine Additive and Subtractive Operations

2018 ◽  
Author(s):  
Magdalena Cortina ◽  
Jon Iñaki Arrizubieta ◽  
Jose Exequiel Ruiz ◽  
Eneko Ukar ◽  
Aitzol Lamikiz
Keyword(s):  
Process Planning ◽  
Machine Tools ◽  
Current Situation ◽  
Point Of View ◽  
Future Perspectives ◽  
Hybrid Machine ◽  
Industrial Context ◽  
Insight Into ◽  
Lack Of Knowledge

Hybrid machine tools combining additive and subtractive processes have arisen as a solution to the increasing manufacture requirements, boosting the potentials of both technologies, while compensating and minimizing their limitations. Nevertheless, the idea of hybrid machines is relatively new and there is a notable lack of knowledge in the field. Therefore, in the present paper, an insight into the advancements of hybrid machines is given, identifying their real capabilities, together with the latest developments from an industrial context. In addition, the current situation and future perspectives of hybrid machines from the point of view of process planning, monitoring and inspection are discussed. Finally, the challenges that must be overcome and the opportunities that the hybrid machines will provide in the forthcoming years are presented.

scholarly journals IoT Devices and Applications for Wire-Based Hybrid Manufacturing Machine Tools

2020 ◽  
Author(s):  
Austen Thien ◽  
Christopher J. Saldana ◽  
Thomas Feldhausen ◽  
Thomas Kurfess
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Disruptive Technology ◽  
Hybrid Manufacturing ◽  
Hybrid Machine Tool ◽  
Subtractive Manufacturing ◽  
Hybrid Machine ◽  
Iot Devices ◽  
The Individual ◽  
Manufacturing Machine

Abstract Hybrid manufacturing machine tools have the potential to be a disruptive technology as they can leverage the benefits of both additive and subtractive manufacturing by incorporating both processes on the same machine while limiting the downsides of the individual processes. Since these machines use two very disparate manufacturing processes and hybrid manufacturing is an emerging technology, it will be useful to monitor data coming from the machine and apply it to improve the manufacturing process, the operation of the machine, and to integrate the machine into the larger digital framework of Industrial Internet of Things (IoT). The present work discusses IoT devices that would be beneficial to add to a hybrid machine tool as well as applications for those devices. The proposed methods discussed in this work have not been experimentally implemented on a hybrid machine tool and so there are no performance data available yet. The hybrid machine tool used as a basis to generate these IoT applications is the Mazak VC-500A/5x AM Hot Wire Deposition, which is a 5-axis machine tool incorporated with a wire feedstock 4kW laser deposition system. Methodologies and applications will be outlined for machine health and process monitoring. Other areas covered include process benchmarking, secure networking options for the proposed IoT framework, and hybrid process improvement. Limitations of these methods and future work for new sensor devices and application areas is also discussed.

Improving the efficiency of surface-thermal hardening of machine parts in conditions of combination of processing technologies, integrated on a single machine tool base

2021 ◽  
Vol 23 (3) ◽  
pp. 45-71
Author(s):  
Vadim Skeeba ◽  
◽  
Vladimir Ivancivsky ◽  
Keyword(s):  
Surface Layer ◽  
Energy Consumption ◽  
Machine Tool ◽  
Machine Tools ◽  
Energy Sources ◽  
Technological Equipment ◽  
Thermal Hardening ◽  
Processing Technologies ◽  
Machine Parts ◽  
Hybrid Machine

Introduction. In the manufacturing industry, there is a particular interest in the development of a new type of technological equipment, which makes it possible to implement methods for modifying the parts surface layers by processing it with concentrated energy sources. The combination of two processing technologies (mechanical and surface-thermal operations) in the conditions of integrated equipment makes it possible to neutralize the disadvantages of monotechnologies and obtain new effects that are unattainable when using technologies separately. The use of hybrid machine tools in conjunction with the developed technological recommendations will allow achieving a multiple increase in the technical and economic efficiency of production, resource and energy saving, which in turn will contribute to an increase in the competitiveness of products and the renewal of the technological paradigm. Purpose of work: increasing productivity and reducing energy consumption during surface-thermal hardening of machine parts by exposure to concentrated energy sources under conditions of integrated processing. Theory and methods: studies of the possible structural composition and layout of hybrid equipment during the integration of mechanical and surface-thermal processes are carried out taking into account the main provisions of structural synthesis and the components of metalworking systems. Theoretical studies are carried out using the basic provisions of system analysis, geometric theory of surface formation, design of metalworking machines, finite-element method, mathematical and computer simulation. Mathematical simulation of thermal fields and structural-phase transformations in the case of HEH HFC is carried out in the ANSYS and SYSWELD software packages, using numerical methods for solving the differential equations of unsteady thermal conductivity (Fourier's equation), carbon diffusion (Fick's second law), and elastoplastic behavior of the material. The verification of the simulation results is carried out by conducting field experiments using: optical and scanning microscopy; mechanical and X-ray methods for determining residual stresses. In the study, Uone JD520 and Form Talysurf Series 2 profilograph-profilometers are used to simultaneously measure shape deviations, waviness and surface roughness. Surface topography is assessed using a Zygo New View 7300 laser profilograph-profilometer. The microhardness of the hardened surface layer of parts is evaluated on a Wolpert Group 402MVD device. Results and discussion. An original method of structural-kinematic analysis for pre-design research of hybrid metalworking equipment is presented. Methodological recommendations are developed for the modernization of metal-cutting machine tools, the implementation of which will allow the implementation of high-energy heating by high-frequency currents (HEH HFC) on a standard machine-tool system and ensure the formation of high-tech technological equipment with expanded functionality. A unified integral parameter of the temperature-time effect on a structural material is proposed when the modes of hardening by concentrated heating sources are assigned, which guarantee the required set of quality indicators of the surface layer of machine parts, while ensuring energy efficiency and processing productivity in general. It is experimentally confirmed that the introduction into production of the proposed hybrid machine tool in conjunction with the developed recommendations for the purpose of the HEH HFC modes in the conditions of integral processing of a “Plunger bushing” type part in relation to the factory technology allows increasing the productivity of surface hardening by 3.5 ... 4.1 times, and reduce energy consumption by 9.5 ... 11.3 times.

scholarly journals Latest Developments in Industrial Hybrid Machine Tools that Combine Additive and Subtractive Operations

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2583 ◽  
Author(s):  
Magdalena Cortina ◽  
Jon Arrizubieta ◽  
Jose Ruiz ◽  
Eneko Ukar ◽  
Aitzol Lamikiz
Keyword(s):  
Process Planning ◽  
Machine Tools ◽  
Point Of View ◽  
Future Perspectives ◽  
Post Processing ◽  
Planning Decision ◽  
Hybrid Machine ◽  
The One ◽  
Complex Parts ◽  
Insight Into

Hybrid machine tools combining additive and subtractive processes have arisen as a solution to increasing manufacture requirements, boosting the potentials of both technologies, while compensating and minimizing their limitations. Nevertheless, the idea of hybrid machines is relatively new and there is a notable lack of knowledge about the implications arisen from their in-practice use. Therefore, the main goal of the present paper is to fill the existing gap, giving an insight into the current advancements and pending tasks of hybrid machines both from an academic and industrial perspective. To that end, the technical-economical potentials and challenges emerging from their use are identified and critically discussed. In addition, the current situation and future perspectives of hybrid machines from the point of view of process planning, monitoring, and inspection are analyzed. On the one hand, it is found that hybrid machines enable a more efficient use of the resources available, as well as the production of previously unattainable complex parts. On the other hand, it is concluded that there are still some technological challenges derived from the interaction of additive and subtractive processes to be overcome (e.g., process planning, decision planning, use of cutting fluids, and need for a post-processing) before a full implantation of hybrid machines is fulfilled.

Analysis of the Influence of the Restraining Chain on the Posture Error of Movable Platform of Hybrid Machine Tools

2009 ◽  
Vol 16-19 ◽  
pp. 723-727
Author(s):  
Jian Ye Guo ◽  
Ming Hu ◽  
Liang Zhao ◽  
Yong Xian Liu
Keyword(s):  
Error Analysis ◽  
Machine Tools ◽  
Influencing Factor ◽  
Shape Error ◽  
Connecting Rod ◽  
Theoretical Relationship ◽  
Theoretical Error ◽  
Movable Platform ◽  
Hybrid Machine

This paper takes one kind of 3-TPT Hybrid Machine Tools (HMT) as the object to study. It mainly analyzes the influence of the parallelogram mechanism as the restraining chain of machine on the posture error of movable platform. Firstly, on the basis of introducing the structure of HMT, the kinematics of the restraining chain of this machine is analyzed, and the kinematics equation of the restraining chain is established. Secondly, the influence of two kinds of factors including the shape error of parallelogram mechanism and the micro-rotation of Hooker joint around the axis of connecting rod is analyzed respectively, and the theoretical relationship expression is acquired between various errors influencing factor and the posture error of movable platform, thus the foundation for the theoretical error analysis of the HMT is laid.

Sign in / Sign up

Export Citation Format

Share Document