Performing DFM Analysis in Multiple Domains Using Interchangeable Manufacturable Entities

1997 ◽  
Author(s):  
Subramanian Krishnan ◽  
Edward B. Magrab
Keyword(s):  
Manufacturing Process ◽  
Feature Recognition ◽  
Integrated Design ◽  
Integrated System ◽  
New Approach ◽  
Small Set ◽  
Multiple Domains ◽  
Shape Characteristics ◽  
Manufacturability Evaluation ◽  
Made In

Abstract An integrated design for manufacture system that performs manufacturability analysis simultaneously in two domains using interchangeable process specific entities is presented. This new approach is illustrated by an integrated system that creates and evaluates parts for manufacture by injection molding using a C-entity, and simultaneously creates and evaluates its mold for manufacture by milling using the fundamental manufacturing entity for milling. The entity for the part manufacturing process is chosen as the complement of the entity for the mold manufacturing process. This obviates the need for converting features from one manufacturing domain to another, and also permits a single uniform data structure to capture the shape characteristics of parts made in the two manufacturing domains. Since all the shapes are represented in the same way, the manufacturability evaluation of the part and the mold is reduced to a small set of algorithms based on an evaluation of the entity’s profile. It is demonstrated that by using process specific entities one can perform manufacturability evaluation of a part without either feature extraction or designing with features. The advantages of using the process specific entities approach for design and manufacturability evaluation over the feature recognition and the design by features approach are enumerated.

An Integrated DFM System for Milling

1997 ◽  
Author(s):  
Subramanian Krishnan ◽  
Edward B. Magrab
Keyword(s):  
Feature Recognition ◽  
Integrated Design ◽  
Geometric Reasoning ◽  
New Approach ◽  
Design For Manufacture ◽  
Minimum Number ◽  
Feature Based ◽  
Two Stages ◽  
Manufacturability Evaluation ◽  
General Profile

Abstract An integrated design for manufacture system for milling is developed by introducing a fundamental manufacturing entity for milling (FMEM), which represents a volume to be machined. A part is created by subtracting a user created set of FMEMs from a rectangular prismatic stock. Manufacturability evaluation is done in two stages: (1) after creating each FMEM; and (2) after placing and subtracting the volume from the stock. It is shown that the commonly used 2½ -D features used to mill a part such as slots, pockets and holes are a subset of the FMEM. Furthermore, all specific shapes of the general FMEM are represented by one compact data structure. It is demonstrated that using process specific entities greatly simplifies manufacturability evaluation, which makes it possible to base the geometric reasoning algorithms on the entity’s most general profile rather than on only a set of specific shapes. A new approach using the FMEMs is presented for generating an integrated process and fixture plan with a minimum number of setup and tool changes. The advantages of using the process specific entities approach for design and manufacturability analysis over the feature recognition approach and feature based approach are enumerated.

A Hybrid Approach to Intelligent Geometric Design Using Features-Based Design and Feature Recognition

1993 ◽  
Author(s):  
Rajit Gadh
Keyword(s):  
Computer Aided Design ◽  
Feature Recognition ◽  
Hybrid Approach ◽  
Systems Design ◽  
Design Feature ◽  
New Approach ◽  
Geometric Entity ◽  
Current Article ◽  
Aided Design ◽  
Manufacturability Evaluation

Abstract The current article presents a new approach to computer aided design based on an abstract geometric entity called a C-loop (Convex/Concave-loop). The approach currently being developed overcomes design limitations in current systems. Design-by-features systems are fast, but not flexible. Design-by-surfaces systems are flexible but cumbersome to use. The current research integrates a design-by-features approach with a design-by-surfaces approach followed by feature recognition. It allows the designer to create a design using design features and to modify these features as needed. The C-loop is the design feature that allows such flexibility. Subsequent to the design step, features pertinent to manufacturing are recognized from the model to perform Design-for-Manufacturability evaluation of the part.

Midsurface Abstraction From 3D Solid Models for Engineering Analysis

1996 ◽  
Author(s):  
Mohsen Rezayat
Keyword(s):  
Feature Recognition ◽  
Analysis Model ◽  
Thin Sections ◽  
New Approach ◽  
Solid Models ◽  
Product And Process ◽  
Plastic Parts ◽  
3D Solid ◽  
User Friendly ◽  
Analysis Models

Abstract An integral part of implementing parallel product and process designs is simulation through numerical analysis. This simulation-driven design requires discretization of the 3D part in an appropriate manner. If the part is thin or has thin sections (e.g., plastic parts), then an analysis model with reduced dimensionality may be more accurate and economical than a standard 3D model. In addition, substantial simplification of some details in the design geometry may be beneficial and desirable in the analysis model. Unfortunately, the majority of CAD systems do not provide the means for abstraction of appropriate analysis models. In this paper we present a new approach, based on midsurface abstraction, which holds significant promise in simplifying simulation-driven design. The method is user-friendly because very little interaction is required to guide the software in its automatic creation of the desired analysis model. It is also robust because it handles typical parts with complex and interacting features. Application of the method for feature recognition and abstraction is also briefly discussed.

scholarly journals Lego-like technologies in manufacturing power distribution boxes for contemporary radar station

2018 ◽  
pp. 59-71
Author(s):  
T. O. Gogoberidze ◽  
V. I. Klassen ◽  
V. V. Kondratev ◽  
P. V. Novikov ◽  
P. A. Tushnov
Keyword(s):  
Systems Engineering ◽  
Power Distribution ◽  
Manufacturing Process ◽  
Labour Productivity ◽  
3D Modelling ◽  
Manufacturing Processes ◽  
New Approach ◽  
Radar Station ◽  
Promising Technology ◽  
System Components

The paper considers ways of increasing labour productivity in manufacturing radioelectronic system components. We used systems engineering methods to develop a new approach to describing manufacturing processes that makes it possible to reduce assembly duration. We present a promising technology for describing a manufacturing process in small-lot production using digital 3D modelling and a Lego -like approach to design building instructions for children's construction sets.

scholarly journals The Control of Cigarette Weight During the Manufacturing Process/Die Kontrolle des Gewichtes von Cigaretten auf den Produktionsmaschinen

1973 ◽  
Vol 7 (1) ◽  
Author(s):  
G. Moretti
Keyword(s):  
Manufacturing Process ◽  
A Posteriori ◽  
Basic Principles ◽  
First Case ◽  
External Causes ◽  
Made In

AbstractThe check of the cigarette weight can be made “a posteriori”, that is when a certain number of cigarettes has been manufactured, and then it is aimed at verifying the acceptability of the lot. Conversely, it can also be executed during the manufacturing process in order to produce acceptable cigarettes. In the first case the ordinary statistical theories can be applied, whereas in the second case, which is the more interesting from cigarette manufacturers' viewpoint, Wiener's theories must be applied on both checks and servo-mechanisms. Consequently, it is necessary to revise the basic principles of the "check'' and then those of the operation of weight-governors in order to attain the highest possible precision, regardless of the external causes which might affect the result. So, the idea of ''self-optimizing'' governors is assumed, that is regulators adjusting their own action to obtain the best results. Molins, Decoufle and, lately, the Industrial Nucleonic Corp., though not having yet developed an adaptive adjuster, have made in recent times the most significant efforts in this field.

scholarly journals MRI Image Reconstruction using Compressive Sensing

2019 ◽  
Vol 8 (2) ◽  
pp. 5256-5260
Keyword(s):  
Compressive Sensing ◽  
Communication Systems ◽  
Optimization Algorithms ◽  
Image Data ◽  
Acquisition Time ◽  
Huge Amount ◽  
Scan Time ◽  
Small Set ◽  
Picture Archiving And Communication ◽  
Made In

A large number of diagnostic images which also include the MRIs are generated by the imaging departments of the hospitals for medical and legal reasons. This results in the creation of a huge amount of data in the form of images which are required to be stored for a long period. The primary challenge for the picture archiving and communication systems (PACS) allowing to store the image data and the display and reconstruction of the image for recalling at various sites. Image compression and reconstruction are necessary to cope up with these tasks. Significant efforts have been made in the recent towards the application of compressive sensing techniques for acquiring the data in MRI process. The primary aim of the theory of Compressive Sensing (CS) in signal processing is reducing the quantity of data that is acquired for successfully reconstructing the signals. Decreasing the number of coefficients of the acquired images will result in reduced acquisition time i.e. nothing but the duration for which the images are exposed to the MRI apparatus. This paper aims at using optimization algorithms in designing the scanner of the MR integrated with the CS, which results in the reduction of the scan time of the MRI. From a small set of acquired samples, images of satisfactory quality can be obtained. Various Compressive Sensing based optimization algorithms for reconstructing the MRI images are assessed, and a relative comparison is done for further research in this paper.

scholarly journals Diagnosis and Recommendation Integrated System (DRIS) in Determining Mineral Status of Cotton in the Cotton Zones of Benin

2019 ◽  
pp. 1-13
Author(s):  
Isidore Amonmidé ◽  
Gustave D. Dagbénonbakin ◽  
P. B. Irénikatché Akponikpè ◽  
Emile C. Agbangba ◽  
Pierre G. Tovihoudji
Keyword(s):  
Nutrient Status ◽  
Nutrient Content ◽  
Integrated System ◽  
The Other ◽  
Chemical Characteristics ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Seed Cotton Yield ◽  
Physical And Chemical ◽  
Made In

This study aimed at developing parameters of the Diagnosis and Recommendation Integrated System (DRIS) model for the assessment nutrient status for cotton grown in Benin.. Soil physical and chemical characteristics, leaves nutrient content (N, P, K, Ca, Mg) and seed-cotton yield were assessed on samples gathered from 150 farmers’ fields in 2018. Nutrient indices were computed using standard DRIS procedures. Results showed that phosphorus was in excess in the petiole and the whole leaves but in deficit in the limb. Potassium content was adequate according in the petiole and leaves but deficient in the limb. Ca content was limiting in the limb or the whole leaves and adequate in the petiole. Based on the diagnosis made in the petioles, Mg was deficient while adequate in the limbs and leaves. In the limb, the order of the macronutrients is as follows: K> P> N. On the other side, in the petiole and the whole leaves, the order of the macronutrients becomes: P> K> N. In the whole leaves and limb, the order of the secondary elements is as follows: Mg> Ca, whereas in the petiole the order of the secondary elements becomes: Ca> Mg.

Knowledge Assisted Integrated Design of a Component and Its Manufacturing Process

2013 ◽  
pp. 291-296 ◽  
Author(s):  
BP Gautham ◽  
Nagesh Kulkarni ◽  
Danish Khan ◽  
Pramod Zagade ◽  
Sreedhar Reddy ◽  
...  
Keyword(s):  
Manufacturing Process ◽  
Integrated Design

A Cognitive Approach to the Mechanism of Intelligence

2011 ◽  
pp. 18-35
Author(s):  
Yi X. Zhong
Keyword(s):  
Intelligent Systems ◽  
Simulation Approach ◽  
Cognitive Approach ◽  
New Approach ◽  
The Core ◽  
Behavior Simulation ◽  
Structural Simulation ◽  
Functional Simulation ◽  
Made In

An attempt was made in the article to propose a new approach to the intelligence research, namely the cognitive approach that tries to explore in depth the core mechanism of intelligence formation of intelligent systems from the cognitive viewpoint. It is discovered, as result, that the mechanism of intelligence formation in general case is implemented by a sequence of transformations conversing the information to knowledge and further to intelligence (i.e., the intelligent strategy, the embodiment of intelligence in a narrower sense). It is also discovered that the three major approaches to AI that exist, the structural simulation approach, the functional simulation approach, and the behavior simulation approach, can all be harmoniously unified within the framework of the cognitive approach. These two discoveries, as well as the related background, will be reported here in the article.

On-Line Industrial 3D Measurement Techniques for Large Volume Objects

2005 ◽  
Vol 295-296 ◽  
pp. 423-430 ◽  
Author(s):  
Ji Gui Zhu ◽  
S.H. Ye ◽  
Xue You Yang ◽  
Xing Hua Qu ◽  
C.J. Liu ◽  
...  
Keyword(s):  
Large Volume ◽  
Measurement Techniques ◽  
Integrated System ◽  
3D Measurement ◽  
Digital Cameras ◽  
Combined Use ◽  
Small Set ◽  
Close Range ◽  
On Line ◽  
Set Up

Rapid progress in modern manufacturing demands for better measurement technique with on-line characteristics. This paper presents a systematic visual solution for on-line industrial 3D measurement. The solution comprises two parts, a multi-sensor visual inspecting station (MSVIS) and a digital close-range visual inspecting station (DCVIS). MSVIS is an integrated system with many sensors. It can meet the requirement of application with sparse measuring points distributed within a large volume. DCVIS only contains two digital cameras with one or more projectors. It has high relative accuracy and a small set up volume and is suitable for applications with dense measuring points. The combined use of MSVIS and DCVIS can provide a general solution for on-line industrial 3D measurement.

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