ANALYSIS OF SURFACE INTEGRITY AFTER HARD TURNING WITH
WIPER INSERTS

 MM (Modern Machinery) Science Journal, October 2014

DOI: 10.17973/MMSJ.2014_10_201409

Miroslav Neslusan1, Miroslav Faktor2, Maria Cillikova1,

1 Faculty of Mechanical Engineering,
2 Faculty of Management Science and Informatics,
University of Zilina, Univerzitna 1, 01026 Zilina, Slovak Republic

e-mail: miroslav.neslusan@fstroj.utc.sk

Abstract

 

This paper deals with analysis of surface integrity after hard turning with wiper insert. Surface integrity expressed in terms of surface roughness, microstructure and residual stress state is compared with conventional insert geometry. Structure and stress state after hard turning is also compared with the following super finished and ball burnished surfaces. The results show that wiper cutting insert enables obtaining surface of low surface roughness at high feeds as well as more favourable stress and structure state as opposed to those produced by conventional insert. Surfaces produced by wiper insert exhibit higher resistance against mechanical load as those induced by ball burnishing.    

 

 
Keywords: hard turning, wiper geometry, residual stress, structure, surface roughness

 
Adobe AcrobatDownload full version of the Paper (Adobe Reader Document, 1.1 MB)
 
______________________________________________________________________________________________________________________________

The following papers were presented at the 3rd International Conference on Design Engineering and Science (ICDES 2014), Pilsen, Czech Republic

DEVELOPMENT OF cm-SCALE WALL CLIMBING HEXAPOD ROBOT
WITH CLAWS

 MM (Modern Machinery) Science Journal, October 2014

DOI: 10.17973/MMSJ.2014_10_201411

Mayo Funatsu, Yushi Kawasaki, Soichiro Kawasaki, Koki Kikuchi

Department of Advanced Robotics, Chiba Institute of Technology, Chiba, Japan

e-mail: kikut@ieee.org

Abstract

In this paper, we investigate the slip condition on a vertical wall surface and propose a cm-scale hexapod robot with claws that can climb the vertical wall. Since the volume force such as gravity is proportional to the length cubed and the area force such as muscle force is proportional to its cross section, i.e., the length squared, an object is more capable of overcoming gravity the smaller it is. This scaling effect allows a small robot to fly easily, accelerate rapidly, and climb a vertical wall with minimal difficulty. Here we developed a claw-type hexapod robot with a body length of 8.5 cm and weight of 13.5 g and realized horizontal and vertical locomotion on a vertical wall. In addition, we clarified the relationship between the gripping ability of the claws and the surface properties of the wall using
a mathematical model.

Keywords: vertical wall climbing, scaling effect, hexapod robot, claws, slip condition

Adobe AcrobatDownload full version of the Paper (Adobe Reader Document, 3,2 MB)

___________________________________________________________________________________________________________________________

CAMERA ARM SYSTEM FOR DISASTER RESPONSE ROBOTS SPACE-EFFECTIVE DESIGN AND PERFORMANCE EVALUATIONS OF PROTOTYPE DEVELOPMENT

MM (Modern Machinery) Science Journal, October 2014

Hideaki Yamato, Kengo Toda, Takashi Kodachi, Masaharu Shimizu, Takeshi Nishimura,
Tomoaki Yoshida, and Takayuki Furuta,

Future Robotics Technology Center (fuRo), CHIBA Institute of Technology, Japan

e-mail: yamato@furo.org

Abstract

In this paper, design and development strategies of a camera arm system for disaster survey robots are discussed. Unlike the previously-provided system, which has been used repeatedly for information gathering purpose at the FUKUSHIMA nuclear disaster in 2011, a newly developed camera arm is mounted on a crawler-type remote operation robot, Sakura II, to enhance image-based investigating performance in human-inaccessible regions. A wide variety of machine design aspects for practical uses of a camera arm system, including functional requirements, space-effective realizations and experimental evaluations, are discussed.

 
Keywords: disaster response robot, rescue robot, remote operation robot, rescue engineering, camera arm, collision protection
 
Adobe AcrobatDownload full version of the Paper (Adobe Reader Document, 2,6 MB)

___________________________________________________________________________________________________________________________

THEORY BASED MANAGEMENT AND SOFTWARE SUPPORT OF PROPERTY DRIVEN DESIGNING
OF TECHNICAL PRODUCTS

MM (Modern Machinery) Science Journal, October 2014

Stanislav Hosnedl

UWB, Department of Machine Design, Pilsen, Czech Republic

e-mail: hosnedl@kks.zcu.cz

Abstract

There exist a lot of engineering design methodologies, methods and/or tools which help engineering designers and/or engineering design managers to increase design quality and competitiveness of the designed technical products. The presented paper reports on the contribution to it by a developed methodology and its SW support for design specification of both Product-Business and Product-Design requirements posed on a designed Technical Product seen as generalized abstract Technical System (TS) during its whole life cycle. These input data are then processed by continuous evaluation of their predicted properties and by early prediction of inherent strengths and weaknesses of the designed alternatives of TS including indication of potential risks. All this is accompanied by comparative evaluation of the designed TS competitiveness related to a starting ‘mother’ product and/or technical solution, and selected competitive products. Calculated results are represented in the form of detailed and clear summary diagrams.

 
Keywords: technical product, life cycle, design specification, property classes, evaluation, quality, competitiveness, risks
 
Adobe AcrobatDownload full version of the Paper (Adobe Reader Document, 4,6 MB)

 

___________________________________________________________________________________________________________________________

APPLICABILITY OF SURFACE PLASTIC FLOW PROCESS FOR MODIFICATION
OF TRIBOLOGICAL PROPERTIES OF TITANIUM

MM (Modern Machinery) Science Journal, October 2014

Hatsuhiko Usami1, Yuma Horiba1,
Hideki Akita2 and Shuichi Kobayashi2

1 Department of Materials Science and Engineering, Meijo University,
2 Hitachi Construction Machinery Co. Ltd.

e-mail: usami@ccalumni.meijo-u.ac.jp

Abstract

The present study proposes a novel surface modification process based on surface deformation, surface plastic flow process, to improve tribological properties of pure titanium (Ti) surfaces. The developed process consists of micro shot peening and roller burnishing: The former and the latter processes are applied to fabricate micro dimples and to penetrate molybdenum disulfide (MoS2) fine powders into the dimples. During the burnishing process, the surface was truncated and the penetrated MoS2 into the dimple was densified simultaneously. As a result, the treated surface was relatively flat and consisted of micro dimples filled with dense MoS2. Tribological properties of the treated surface were evaluated with a ring on disc type testing apparatus using a hardened steel ring as a mated specimen in lubricated condition. Results indicate that the tribological properties of the MoS2 penetrated surface have significantly improved including restriction
of occurrence of seizure.

 
Keywords: surface design, surface texture, solid lubricant penetration, surface plastic flow, shot peening, roller burnishing, tribology, titanium
 
Adobe AcrobatDownload full version of the Paper (Adobe Reader Document, 2,4 MB)