Change search
Link to record
Permanent link

Direct link
BETA
Cao, Haiping
Publications (10 of 19) Show all publications
Cao, H., Wessén, M. & Granath, O. (2010). Effect of injection velocity on porosity formation in rheocast Al component using RheoMetal process. International Journal of Cast Metals Research, 23(3), 158-163
Open this publication in new window or tab >>Effect of injection velocity on porosity formation in rheocast Al component using RheoMetal process
2010 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 23, no 3, p. 158-163Article in journal (Refereed) Published
Identifiers
urn:nbn:se:hj:diva-14235 (URN)10.1179/136404609X12565676328682 (DOI)
Available from: 2011-01-09 Created: 2011-01-09 Last updated: 2017-12-11Bibliographically approved
Granath, O., Wessén, M. & Cao, H. (2010). Porosity reduction possibilities in commercial Aluminium A380 and Magnesium AM60 alloy components using the RheoMetal process. Metallurgical Science and Technology. Metallurgical Science and Technology, 28(1), 2-11
Open this publication in new window or tab >>Porosity reduction possibilities in commercial Aluminium A380 and Magnesium AM60 alloy components using the RheoMetal process. Metallurgical Science and Technology
2010 (English)In: Metallurgical Science and Technology, ISSN 0393-6074, Vol. 28, no 1, p. 2-11Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Italy: Teksid Aluminium, 2010
Identifiers
urn:nbn:se:hj:diva-14238 (URN)
Available from: 2011-01-09 Created: 2011-01-09 Last updated: 2011-01-11Bibliographically approved
Granath, O., Wessén, M. & Cao, H. (2008). Determining the effect of slurry process parameters on semisolid A356 alloy microstructures produced by the RheoMetalTM process. International Journal of Cast Metals Research, 21(5), 349-356
Open this publication in new window or tab >>Determining the effect of slurry process parameters on semisolid A356 alloy microstructures produced by the RheoMetalTM process
2008 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 21, no 5, p. 349-356Article in journal (Refereed) Published
Identifiers
urn:nbn:se:hj:diva-11125 (URN)10.1179/136404608X320706 (DOI)
Available from: 2009-12-21 Created: 2009-12-21 Last updated: 2017-12-12Bibliographically approved
Granath, O., Wessén, M. & Cao, H. (2008). Porosity reduction possibilities in commercial aluminium A380 and magnesium AM60 alloy components using the RheoMetalTM process. In: Proceedings of 4th international conference High Tech Die Casting, AIM: Montchiari (Brescia), Italy 9-10 April 2008. Milano, Italy.: Associazione Italiana di Metallurgia
Open this publication in new window or tab >>Porosity reduction possibilities in commercial aluminium A380 and magnesium AM60 alloy components using the RheoMetalTM process
2008 (English)In: Proceedings of 4th international conference High Tech Die Casting, AIM: Montchiari (Brescia), Italy 9-10 April 2008, Milano, Italy.: Associazione Italiana di Metallurgia , 2008Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Milano, Italy.: Associazione Italiana di Metallurgia, 2008
Identifiers
urn:nbn:se:hj:diva-11126 (URN)9788885298637 (ISBN)
Available from: 2009-12-21 Created: 2009-12-21 Last updated: 2010-03-18Bibliographically approved
Cao, H., Granath, O. & Wessén, M. (2008). The effect of Si Content on the Mechanical Properties of Rheocast Al Components Using the RHEOMETAL Process. Solid State Phenomena, 141-143, 779-784
Open this publication in new window or tab >>The effect of Si Content on the Mechanical Properties of Rheocast Al Components Using the RHEOMETAL Process
2008 (English)In: Solid State Phenomena, ISSN 1012-0394, E-ISSN 1662-9779, Vol. 141-143, p. 779-784Article in journal (Refereed) Published
Identifiers
urn:nbn:se:hj:diva-11124 (URN)10.4028/www.scientific.net/SSP.141-143.779 (DOI)
Available from: 2009-12-21 Created: 2009-12-21 Last updated: 2017-12-12Bibliographically approved
Wessén, M. & Cao, H. (2006). Influence of holding time on particle size of an A356 alloy using the new Rapid Slurry Forming process. In: Proceedings of 3rd International Conference High Tech Die Casting, AIM, Vicenza, Italy.
Open this publication in new window or tab >>Influence of holding time on particle size of an A356 alloy using the new Rapid Slurry Forming process
2006 (English)In: Proceedings of 3rd International Conference High Tech Die Casting, AIM, Vicenza, Italy, 2006Conference paper, Published paper (Other academic)
Identifiers
urn:nbn:se:hj:diva-10863 (URN)
Available from: 2009-11-06 Created: 2009-11-06 Last updated: 2010-03-24Bibliographically approved
Cao, H. & Wessén, M. (2006). Processing effects on the morphology of semi-solid Mg alloy slurry produced by the RSFTM process. In: Proceedings of 3rd International Conference High Tech Die Casting, AIM, Vicenza, Italy.
Open this publication in new window or tab >>Processing effects on the morphology of semi-solid Mg alloy slurry produced by the RSFTM process
2006 (English)In: Proceedings of 3rd International Conference High Tech Die Casting, AIM, Vicenza, Italy, 2006Conference paper, Published paper (Other academic)
Identifiers
urn:nbn:se:hj:diva-10864 (URN)
Available from: 2009-11-06 Created: 2009-11-06 Last updated: 2010-03-24Bibliographically approved
Wessén, M. & Cao, H. (2006). The RSF technology: A possible breakthrough for semi-solid casting processes. In: Proceedings of 3rd International Conference High Tech Die Casting, AIM, Vicenza, Italy.
Open this publication in new window or tab >>The RSF technology: A possible breakthrough for semi-solid casting processes
2006 (English)In: Proceedings of 3rd International Conference High Tech Die Casting, AIM, Vicenza, Italy, 2006Conference paper, Published paper (Other academic)
Identifiers
urn:nbn:se:hj:diva-10862 (URN)
Available from: 2009-11-06 Created: 2009-11-06 Last updated: 2010-03-24Bibliographically approved
Cao, H. & Wessén, M. (2005). Characteristics of microstructure and banded defects in die-cast AM50 magnesium components. International Journal of Cast Metals Research, 18(6), 377-384
Open this publication in new window or tab >>Characteristics of microstructure and banded defects in die-cast AM50 magnesium components
2005 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 18, no 6, p. 377-384Article in journal (Refereed) Published
Abstract [en]

It has become more and more common for companies to move part of their production to low cost countries and/or closer to important markets. However, quite often the product development is not moved. The result is an increased distance between product development and production. The interface between the two departments is important to lead time, cost and quality and therefore the cooperation must work smoothly. To achieve this, most literature recommends early and tight cooperation. However this can be complicated by expensive and time consuming travels and/or usage of less rich communication such as emails and phone calls.

It is difficult to make the transition in general from product development to production and the possible problems increase with the distance. The PD-P interface consists of several components and how a problem in one component is affected by problems in other components is not explicitly discussed in literature. The purpose in this paper is to explore if there are such connections i.e. connections between an observable problem and other components in the PD-P interface in a geographically dispersed setting. The paper does so by merging the distributed work literature and the PD-P interface literature.

The analysis is based on four PD-P interface components; technological, organizational, scope and task. The analysis indicates that observable problems as e.g. low frequency of communication can be the symptom of one or a combination of problems. Connections between the components in the PD-P interface are exemplified in a geographically dispersed setting. Furthermore the underlying causes to the problems connected to the geographically dispersed setting in the PD-P interface are elucidated. In the case of low frequency of communication, it could be the technical system hindering communication and the different time zones disrupt it even more. Hence one symptom could be caused by different underlying problems. Each problem needs to be broken down to find the cause and the solution could be found in any of the four interface components.

The results indicate that the actual distance is not the biggest problem but uncertainties (e.g. new collaborations) and differences (culture and work methods) which increase lead time. We have also seen that single underling problems can cause problem in several of the PD-P interface components. This indicates that if these underlying problems can be solved the project results can be vastly improved. For example, trust issues occur in the scope component (affects the willingness to share information) and in the organizational interface component (both competence trust and goodwill trust affects involvement and commitment to the project). Consequently, if problems like this can be solved many other problems will become minor problems and project objectives will be more likely to be obtained. However trust is difficult to achieve with a geographical distance between product development and production. The analysis also indicates that due to the distance more attention is paid to the PD-P interface, e.g. more experienced team members are appointed. This can be contributing to a smoother PD-P interface than expected.

Keywords
Small and medium sized enterprises, decision criteria, manufacturing characteristics
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:hj:diva-2761 (URN)doi:10.1179/136404605225023216 (DOI)
Available from: 2008-07-08 Created: 2008-07-08 Last updated: 2017-12-12Bibliographically approved
Cao, H. & Wessén, M. (2005). Mechanisms of segregation band defect formation in pressure die-cast magnesium components. Materials Science Forum, 488-489, 381-384
Open this publication in new window or tab >>Mechanisms of segregation band defect formation in pressure die-cast magnesium components
2005 (English)In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 488-489, p. 381-384Article in journal (Refereed) Published
Abstract [en]

Initially, when implementing a design automation system the focus is on successfully developing a system that generates design variants based on different customer specifications, i.e. the execution of system embedded knowledge and system output. However, in the long run two important aspects are the modelling and management of the knowledge that govern the designs. The increasing emphasis to deploy a holistic view on the products properties and functions implies an increasing number of life-cycle requirements. These requirements should all be used to enhance the knowledge-base allowing for correct decisions to be made. In a system for automated variant design these life-cycle requirements have to be expressed as algorithms and/or computational statements to be intertwined with the design calculations. The number of requirements can be significantly large and they are scattered over different systems. The aim of the presented work is to provide an approach for modelling of manufacturing requirements, supporting both knowledge execution and information management, in systems for automated variant design.

Keywords
Design automation, requirement management, requirement modelling, manufacturing requirements, producibility.
Identifiers
urn:nbn:se:hj:diva-4683 (URN)10.4028/www.scientific.net/MSF.488-489.381 (DOI)
Available from: 2008-05-19 Created: 2008-05-19 Last updated: 2017-12-12Bibliographically approved
Organisations

Search in DiVA

Show all publications