Integration of cad-cam systems & shared data base

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)