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INTEGRATION OF CAD-CAM SYSTEMS
& SHARED DATA BASE
Presented By: Arnab Chakraborty
Roll No: 801482003
ME-PIE
INTRODUCTION
In today's competitive market where customer
beliefs and needs are major components of a
product, understanding and developing efficient
new products makes the winner of the enterprises.
The importance of new product development (NPD)
has grown dramatically over the last few decades,
and is now the dominant driver of competition in
many industries, such as automobiles,
biotechnology, industrial electronics, computer
software and pharmaceuticals etc.
PROBLEM STATEMENT
Reduce Design Time
Reduce manufacturi
ng time
Maintain high
quality
VISION
To achieve this, input product data fromcustomers, suppliers and experts areessential for all parties. The overallprocess must be well orchestrated andintegrated.
The problems usually are related to theexchange of product data and informationbetween different parts of the enterprises.
CIM (COMPUTER INTEGRATED MANUFACTURING)
It encompasses entire range of product
development & Manufacturing activities with all
functions being carried out with dedicated software
packages.
It helps to seamlessly integrate product (design)
data into process (manufacturing) data.
It uses a common data base & communication
technology to automate segments of facility or
factory.
BENEFITS OF CIM
Reduces human exponent of maufacturing.
Relieves process of SLOW/ EXPENSIVE &
ERROR PRONE components.
Fulfillment of scheduled delivery dates.
Quality improvement.
Total flexibility in manufacturing systems.
Thus improves overall productivity .
RESOURCES OF CIM
TQM (Total Quality Management)
BPR (Business Process Re-engineering)
Concurrent Engineering
Work Flow Automation
ERP (Enterprise Resource Planning)
FMS
USE OF COMPUTER’S
CIM makes full use of capabilities of computers for
both hard & soft ends by:
I. Variable & Programmable Automation
II. Real time Optimization
o CIM hardware includes CNC M/c centre's,
Robotic work cells, work/tool handling, storage
devices etc.
o CIM software include computer programs that
carry out following duties like; MIS, Sales/
Marketing/ Finance, DBMS, Modeling & Design,
communications, monitoring (job tracker) etc.
MAJOR ELEMENTS OF CIM
TYPES OF INTEGRATION
Physical Integration
Application Integration
Business Integration
In essence, the successful implementation of CIM
lies in the efficiency of the way relevant information
is being shared among different segments which
being really complex hence need for data-bases
have arrived .
CIMS DATA FILES
Part Programming files
Routing files
Part production files
Pallet Reference files
Station tool files
Tool life files
DATABASE
Key features
To define data
To Access data
To manipulate
data
To present data
It is a unified computer based collection of data shared by authorized user’s.
DATABASE ELEMENTS
Product Data
Manufacturing Data
Operational Data
Resource Data
OBJECTIVES OF DATA BASE
Reduce/ Eliminate redundant data
• Integrate existing data
Provide Security
• Share data amongst Users
Incorporate changes quickly.
• Simplify & improve accuracy of data
DATABASE MODELS
Relational Databse
Network Database
Hierarchical Database
DBMS (DATA BASE MANAGEMENT SYSTEM)
A database management systemconsists of a collection of interrelateddata and a set of programs to accessthat data.
It consists of a collection ofinterrelated data and a set ofprograms to access that data.
Some well known DBMS areMYSQL, Microsoft SQL, ORACLE,SAP & IBM DB2.
COLLABORATIVE PRODUCT DEVELOPMENT
SYSTEM (CPDS)
TYPICAL ISSUES
High Investment
Necessity to have highly trained man-power
Redundancy under eventualities like crash of data
base server
Need to ensure reliability of data
Manufacturing database & its management is a
topic of concern for CIM, a problem has been
that of distributing information amongst
different computer based systems.
EXCHANGE OF CAD DATA BETWEEN
SOFTWARE PACKAGES
Necessity to translate drawings created in one
drafting package to another often arises.
Several problems existed in earlier days with
independent translators needed to exchange
geometric data from one package into another.
A solution to this problem of direct translators is to
use neutral files.
Three types of neutral files are discussed in this
work they are: Drawing Exchange (DXF), IGES &
STEP files.
FILE FORMATS
DXF {Drawing eXchange Format}: This format was
devised in 1982 to export data from CAD package
Auto CAD.
XML {eXtensible Markup Language}: It defines a
set of rules for encoding documents in a format
which is both human & machine readable.
IGES {Initial Graphics Exchange specifications} The
CAD/CAM Integrated Information Network (CIIN) of
Boeing served as the preliminary basis of IGES.
IGES version 1.0 was released in 1980.
Recent modification being PDES {Product
Development Exchange Specification}
CLIENT-SERVER ARCHITECTURE
STEP {STANDARD EXCHANGE OF PRODUCT DATA}
The Standard for the Exchange of Product Data
(STEP) is the enabler for such seamless data
exchange.
It provides a worldwide standard for storing, sharing
and exchanging product information among
different CAD systems.
It covers border functionalities. It includes methods
of representing all critical product specifications
such as shape information, materials, tolerances,
finishes and product structure.
SCOPE OF FUTURE WORK
Flexible Manufacturing & Control System (FMCS):
Decision support systems.
Nanometrology: New generation instrumentation for
analysis, control, manipulation & manufacturing at
nano-scale.
Reconfigurable System Design: In order to make
agents compatible with new reconfigurable m/c.
Virtual Reality Labs
Financial Engineering for plants: Build & operate
models.
LITERATURE REVIEW
Mahmoud Houshmand and Omid Fatahi Valilai
Proceedings of the World Congress on Engineering
and Computer Science 2010 Vol II WCECS 2010,
October 20-22, 2010, San Francisco, USA
Information management for manufacturing
systems design. Pisarciuc, Cristian. Brasov : s.n.,
2007. International Conference on Economic
Engineering and Manufacturing Systems. 25 – 26
October.
CAD/CAM/CIM by Radhakrishnan, Subramanyan &
Raju New Age 2007 (3rd edition)