Assembly model plans an important role in assembly sequence planning.Flexible assembly system (FAS) is a dis- crete event system (DES),so Petri net,as an important analytical tool for the DES,is used for modeling of an FAS.All of the feasible assembly sequences can be obtained by firing the Petri net model.In order t...
Wire rolling is a typical large deformation process and its principle is very complex,which includes material non- linearity,geometry non-linearity and boundary non-linearity.It is difficult to obtain theory analytical results by trying to roll or physical experiment because they will induce many problems such as hig...
The concept of machine vision based manufacturing technology is proposed first,and the key algorithms used in two-dimensional and three-dimensional machining are discussed in detail.Machining information can be derived from the binary images and gray picture after processing and transforming the picture.Contour and t...
Spatial circular arc can be machined conveniently by a 5-axis NC machine tool.Based on the data sampling method,circular interpolation in two-dimensional plane is discussed briefly.The key is to solve the problem of circular center ex- pressed in the workpiece coordinate system by means of the transformation matrix.C...
After analyzing and comparing the traditional automobile instrument,the onboard instrument based on virtual instrument technology is designed in this paper.The PC/104 computer was employed as the core processing unit of the onbaard in- strument,and the several intelligent data acquisition nodes are set and connected ...
This paper presents investigations on discharging mechanism in powder mixed EDM.By analyzing the inception, growth of electrical tree and the ignition of discharges in liquid filled gap,the whole discharging process is proposed.It is explored that the reason of modification of ignition behaves by adding fine particle...
Shipbuilding is becoming more complex and requires many different enterprises and plants to work cooperatively to strive for the maximum profit.Supported by the computer technology,information technology,and internet technology etc., CSCW (Computer Supported Cooperative Work) plays a very crucial role in the multi-te...
A hierarchical closed-loop production control scheme integrating scheduling,control and performance evaluation is discussed.Firstly,the production process is divided into two main hierarchies:the lower level is the physical operation level and the upper one is the management level.Secondly,the schedule template for t...
Manual definition of inspection feature in Coordinate Measuring Machines (CMM) is time-consuming and error- potential.Since CAD model contains all design data,an integration system of CAD/CMM is constructed to automate above pro- cess.First,tolerance feature and its attributes,including tolerance type,value and tag o...
This paper introduces the constitute,structure and the software model of a set of networked manufacturing process monitoring system,using JAVA network technique to realize a set of three layer distributed manufacturing process monitoring sys- tem which is comprised with remote manage center,manufacturing process supe...
In order to interpret the magnetic flux leakage (MFL) testing data quantitatively and size the defects accurately, some defect profiles inversion methods from the MFL signals are studied on the basis of the neural network.Because the wavelet ba- sis function neural network (WBFNN) has good accuracy in the forward cal...
Surface Mount Technology Manufacturing Grid (SMT-MG) is the application of the grid technology in the SMT product manufacturing.In this paper,as the new manufacturing mode of SMT product,SMT-MG was brought forward.Then the concept and intention of the SMT-MG were analyzed.And from the three aspects of sufficient cond...
SNIT-MG is a typical application of grid in electric product manufacturing.The organization and operation mode are hey problems in SMT-MG.In this paper,SMT-MG is taken as research object.Its mesh three-dimensional matrix orga- nization mode is presented.Meanwhile from operation foundation,process,environment and targ...
This paper brings forward a kind of machining error forecast principle in NC lathe simulation system.It com- bines the method of math,dynamic,material and mechanism,etc,sums up the factors which can affect the machining error,co- alescent knowledge of mechanism manufacture technique and interconvert characteristic,ma...
As the conceptual design of air-conditioning is done using the theory of Quality Function Deployment (QFD),cus- tomer requirements should be understood and the product competitive power be analyzed as exactly as possible for new product de- signing.Lots of information in the process of this research is fuzzy and unce...
In this paper,the Web-based integration methodology and framework have been developed to facilitate collabora- tive and concurrent engineering design in distributed manufacturing environments.The distributed concurrent engineering and co- design are discussed as key components in the mechanism.The related integration...
Jaw crusher is a kind of machine widely used in mining and aggregates industry,but it still has some shortcom- ings,such as liners wear,terrible power draw etc.The lack of research on material flow strongly limits the design improvement. The size reduction of the jaw crusher relies on the moving jaw movement that is ...
Stamping process,which is widely used in automobile,aerospace,machine-building industries,and etc.,is a creative process needing time and experiences.The lead time is mainly spent on stamping die design and manufacturing.As the ba- sis of die design,process design is a non-linearity and creative process,which can be ...
Shop scheduling problem is core part and research hot in modern manufacture system,it has important meaning for decreasing operating costs,shortening production period and so on.Based on shop scheduling problems,this paper mainly dis- cuss and classify uncertainty factors of the shop scheduling,Meanwhile set up corre...
CKD/IKD is a new technology management method which should be used instead of commerce mode of CBU.In the international trade,as to the products with fast update,complex structure,mass variety,complicated sales states and multi- mode configuration,when they are exported to enterprises without independent technology o...
Bill of material (BOM) structures describe the component structure of a product.It is used and processed in the whole product lifecycle,and is the bridge for the product data integration among enterprise application.In the process of product development,product model is evolving and BOM is also changed.To keep the da...
A model-exchange method based on feature between isomerous CAD systems is put forward in this paper.In this method,CAD model information is accessed at both feature and geometry levels and converted according to standard feature opera- tion.The feature information including feature tree,dimensions and constraints,whi...
CAPP(Computer Aided Process Planning) has already become the bottleneck of CAD/CAM system.Present two- dimensional CAPP system which is used in the enterprise needs to be input information and data again,because it can not draw data from CAD(Computer Aided Design) model automatically after building CAD model and draw...
Modern high speed machining (HSM) machine tools often operates at high speed and high feedrate with high ac- celerations,in order to deliver the rapid feed motion.This paper presents an interpolation algorithm to generate continuous quintic spline toolpaths,with a constant travel increment at each step,while the smoo...
When the explosive disposal robot traveling over a rough road,it will shake up and down,and generates dynamic loads.Furthermore,the jolt of the explosive disposal robot will result in oscillation and large inertia forces of the explosive,and will effect the stability of the grasped explosive,even cause the explosive ...
The reconstruction of free-form surface is a fundamental problem in digital manufacture.This article presents a novel solution to reconstructing free-form surface from an intensity image under the Lambertian reflection model,that is a method called shape from shading (SFS).Our approach is based on the two-dimensional...
Business Marketing Management over the Internet has been receiving a“lot of ink”in current periodicals and to a lesser degree in academic literature.Practice changes so rapidly that principles emerging from last month’s successes may need revi- sion before they are derived and printed.The emergence of electronic c...
Since domestic corporations firstly introduced into and implemented the Advanced Manufacturing Technology (AMT),how to scientifically evaluate the implementation effects of AMT has been an urgent problem.Through the review of for- eign relative studies,this paper constructs an indicator system used to evaluate the im...
A new type of parallel indexing cam mechanism is discovered.The composition of the cam profile is proposed and the formulas of the mechanism parameters are established by synthesis of its configuration and size.The equations for working pro- file and pressure angle of the cam are derived based on the inverse model an...
The acquisition and processing of equipment information is pivotol to control and management of the automated storage and retrieval system.The work of this paper is based on the automatic storage and retrieval experimental system of Wuhan University of Technology.First,the output/input flow and the control informatio...
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