Product Modeling for Computer Integrated Design and Manufacture

1997 ◽  
Keyword(s):  
Integrated Design ◽  
Product Modeling ◽  
Design And Manufacture

Spline Based Design of Cam Contours for Improved Dynamic Performance

1993 ◽  
Author(s):  
Holly K. Ault ◽  
James C. Wilkinson
Keyword(s):  
Dynamic Performance ◽  
Integrated Design ◽  
Polynomial Functions ◽  
Piecewise Polynomial ◽  
Cam Design ◽  
Piecewise Polynomial Functions ◽  
Cam Follower ◽  
Cam Profile ◽  
Pitch Curve ◽  
Design And Manufacture

Abstract A method for the integrated design and manufacture of radial plate cams is discussed. Currently, a cam-follower system is designed by specifying constraints on the motion of the follower. The physical cam contour or cam pitch curve are not mathematically defined. The cam is manufactured from the discretized follower motion program. A new method for cam design is proposed which will produce a smooth, mathematically defined cam pitch curve while maintaining the proper constraints on the follower motion. Piecewise polynomial functions in the form of rational and/or non-rational splines may be used. Cams will be manufactured using smoothed profiles and tested for improved dynamic performance. The results of initial investigations of cam profile design for this research are presented.

scholarly journals Design and manufacture of hybrid metal composite structures using functional tooling made by additive manufacturing

2019 ◽  
Vol 5 ◽  
Author(s):  
Daniel-Alexander Türk ◽  
Fabian Rüegg ◽  
Manuel Biedermann ◽  
Mirko Meboldt
Keyword(s):  
Additive Manufacturing ◽  
Composite Structures ◽  
Selective Laser Sintering ◽  
Integrated Design ◽  
Material Structure ◽  
Metal Composite ◽  
Interface Elements ◽  
Manufacturing Technique ◽  
Reference Design ◽  
Design And Manufacture

This paper presents a novel manufacturing technique for complex-shaped, hybrid metal composite structures leveraging the design freedom of additive manufacturing (AM). The key novelty of this research is an approach for an autoclave-suitable and removable tooling, which consists of a 3D-printed functional shell and a structural filler material. In this process, a layup shell is produced with AM and filled with a temperature-resistant curing support to form a removable inner tooling. The functional shell has integrated design features for the positioning and the fixation of metallic interface elements and is removed after curing through integrated breaking lines. The feasibility of this manufacturing technique is demonstrated by fabricating a novel lightweight structure for the hydraulic quadruped (HyQ) robot. Selective laser sintering (SLS) was used to produce the functional shell tooling. Titanium interface elements made via selective laser melting (SLM) were assembled to the shell and co-cured to carbon fiber using an autoclave prepreg process. The resulting multi-material structure was tested in ultimate strength and successfully operated on the HyQ robot. Weight savings of 55% compared to a reference design and the mechanical viability of the multi-material structure indicate that the proposed manufacturing technique is appropriate for individualized hybrid composite structures with complex geometries.

Computer-Integrated Design and Manufacturing of Packaging Machines

2005 ◽  
Author(s):  
Scott E. Buske ◽  
Tien-I Liu
Keyword(s):  
Knowledge Base ◽  
Integrated Design ◽  
Base System ◽  
Design Standards ◽  
User Input ◽  
Tool Paths ◽  
Warning Messages ◽  
Knowledge Base System ◽  
The Cost ◽  
Design And Manufacture

Automated packaging machines must be constantly redesigned to accommodate ever changing packing. There is little time to make these changes and no room for error. In this work, computer-integrated design and manufacture of a packaging machine has been conducted. A knowledge base system has been developed, which checks for errors in user input, updates all assemblies per the user input, checks for part interferences in the assembly, holds the new design to accepted design standards, and sends warning messages to the user’s computer screen in the event of a problem. The knowledge base then creates new intelligent part numbers. These part numbers provide the informational link from Engineering to Production as they contain all the new part information needed to make the parts. These part numbers are entered into a program that automatically creates the new tool paths for the CNC mill. The entered part number is automatically milled into the part to insure the correct part was entered. The cost of design and manufacture is then reduced substantially. This knowledge base also extends into sales for quoting and for new job creation which expedites the entire process.

Computer-Aided Monte Carlo Aircraft Tolerance Design Based on UG

2011 ◽  
Vol 338 ◽  
pp. 300-303
Author(s):  
Chang Hong Guo ◽  
Ping Xi ◽  
Zhen Yu Wang ◽  
Xing Dong Li
Keyword(s):  
Monte Carlo ◽  
Three Dimensional ◽  
Integrated Design ◽  
Tolerance Analysis ◽  
Digital Design ◽  
Tolerance Design ◽  
Computer Aided ◽  
Design And Manufacture

Along with the CAD technology being popularized, three-dimensional design of aircraft is ultimately realized into digital design. However, aircraft tolerances have not been designed by computer. They are mainly based on lots of manual calculations and not coordinated with integrated design and hold back the development of aircraft digital design and manufacture technologies. This paper introduces how to develop computer-aided aircraft tolerance analysis and distribution modules on UG and introduces Monte Carlo tolerance analysis technology. Running instances of aircraft tolerance design are illustrated in the paper.

A contribution to technological data estimation for concurrent engineering using geometrical control of net shape forming parts

2003 ◽  
Vol 217 (5) ◽  
pp. 661-667 ◽  
Author(s):  
R Bigot ◽  
P Martin ◽  
S Leleu
Keyword(s):  
Knowledge Integration ◽  
Integrated Design ◽  
Industrial Applications ◽  
Forming Process ◽  
Design And Manufacturing ◽  
Technological Data ◽  
Full Knowledge ◽  
Net Shape Forming ◽  
Definition Of ◽  
Design And Manufacture

Within the framework of integrated design and manufacturing in mechanical engineering, which is now a well-known field, the design of the parts, the choice of process parameters and even the design of the production system must be carried out at the same time. However, in order to achieve full knowledge integration taking into account the actors' knowledge (the intervening people in the process of design and manufacture of a product are named ‘actors’) and their various points of view, it is necessary to formalize and structure this knowledge together with the technical and economical constraints (manufacturing, quality, logistics, cost, etc.). This means that the models and data must be homogeneous, coherent and not user adapted until their actual time of use. In order to give an illustration of this wide-ranging problem a case of application will be presented in the field of the forming process based on two industrial applications that have been carried out. A contribution is proposed for an approach that makes it possible to gather the technological data and information necessary for integrated design and manufacturing in order to obtain net shape forming of workpieces for the automotive industry. Two approaches are presented, on the basis of dimensional control of the workpiece: the first deals with the description of the forming process, and the second covers the definition of product functionality.

Sign in / Sign up

Export Citation Format

Share Document