1、ORIGINAL ARTICLEAlgorithm for automatic parting surface extensionin the mold design navigating processWen-Ren Jong&Tai-Chih Li&Rong-Ze SyuReceived:30 June 2011/Accepted:28 November 2011#Springer-Verlag London Limited 2011Abstract This study focused on the planning and de-velopment of an algorithm an
2、d process for automaticparting surface design under the CAD software archi-tecture.Relating to the smooth opening of a mold,theparting surface is an important step of mold design.Theparting surface can be categorized into the main partingsurface and the shut-off parting surface.This studydeveloped a
3、n algorithm of extension rules for the mainparting surface and determined the contour vector andgeometric relationship via computer software.It canrealize the main parting surface automatic extensionand can be embedded into a web-based mold designnavigating process.Through a standardized design pro-
4、cess,it can reduce the number of mouse clicks by 90%,enabling users to rapidly complete mold designs,reducedesign errors,and improve efficiency.Keywords Molddesign.Automaticdesign.Partingsurface.Navigatingprocess.Pro/Web.Link1 IntroductionTraditional mold design and manufacturing processes,fromthe c
5、onceptual design and mold design to manufacturing,assembly,and testing,depend on the expertise andexperience of professionals.However,it takes time tofoster a professional who can do the job independently,and personnel turnover may lead to substantial lossesfor enterprises and the loss of intangible
6、 assets,such asaccumulated experience and expertise.Therefore,how toretain experienced employees and allow other employeesto effectively absorb knowledge through systematicmanagement is a topic of concern.It is a current trendto integrate knowledge and technology into automaticdesign concepts for va
7、rious types of professional appli-cation modules that engineers can directly use.System-atic automation can shorten model design time andreduce human errors in design,as well as losses result-ing from the flow of talent.This study aimed to devel-op a mold parting surface design based on the concepto
8、f automation.Nee et al.1,2 suggested generating a three-dimensionalparting line and parting surface,based on the best partingdirection,to divide the molding surface into three majorgroups according to the de-molding direction and topolog-ical relationship.The maximum edge loop surface groupsare defi
9、ned to generate the edge loop,and different surfaceedge loop groups are set up to define the major parting lineand other parting lines,respectively.In addition,Nee et al.also proposed an effective method to identify and extractundercuts and produce the ideal de-molding direction by thenumber and cor
10、responding volumes of the undercuts.Fu etal.3 proposed that the possibility of parting and the obvi-ousness of the surface,as well as its plasticity,can improveparting design efficiency.Chakraborty and Reddy 4 deter-mined the optimal de-molding direction,parting line,andparting surface of a two-plat
11、e mold by integrating the min-imum undercut areas and the parting surface smoothness aswell as the minimum model depth.Weinstein andW.-R.Jong(*):T.-C.Li:R.-Z.SyuDepartment of Mechanical Engineering,Chung Yuan Christian University,Chung-Li 32023,Taiwan,Republic of Chinae-mail:wenrencycu.edu.twW.-R.Jo
12、ng:T.-C.Li:R.-Z.SyuR&D Center for Mold and Molding Technology,Chung Yuan Christian University,Chung-Li 32023,Taiwan,Republic of ChinaInt J Adv Manuf TechnolDOI 10.1007/s00170-011-3831-3Manoochehri 5 divided the surface into a mutual relation-ship in the positive direction of the convex surface to fi
13、ndout the optimal draft angle and position of the parting line.Ravi and Srinivasan 6 employed a computer-aided partingsurface design and proposed the relevant design logic forparting models applied in mold design to help engineers.Kong et al.7 proposed a method using a penetration holeas the searchi
14、ng feature to effectively repair shut-off holeswith complex shapes by applying topological-basedgraphics.Li et al.8 proposed a method of automaticallygenerating a parting surface that uses edge curves to producea curved surface by segmentation before integrating thesegments to complete the repair of
15、 a parting surface.Kumaret al.9 used polyhedron face adjacency graph to identifytypes of undercuts,completely visible and partially visible,and used the result to determine the optimal parting surface.Dignum and van de Riet 10 proposed a language tomanage knowledge.The language can sort knowledgeby
16、category to summarize sporadic information intorational knowledge for future mining and use.Regardingknowledge management systems,Fahey and Prusak 11pointed out that an excessive emphasis on technological as-pect can lead to indifference between knowledge andinformation.In this case,a knowledge management systemis similar to information management,and it fails to completethe tasks of knowledge management.Thibault et al.12proposed an integrated productprocess approach to evaluatethe consistency a
