001-Introduction to Numerical Control
18
06/07/22 IE 447 - CIM Lecture Notes - Chapter 3 Numerical Contr ol 1 NUMERICAL CONTROL ( NC ) NUMERICAL CONTROL ( NC ) JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
-
Upload
malik-muchamad -
Category
Documents
-
view
232 -
download
3
Transcript of 001-Introduction to Numerical Control
04/10/23 IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
1
NUMERICAL CONTROL ( NC )NUMERICAL CONTROL ( NC )
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 2IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
What Is Numerical ControlWhat Is Numerical Control ? ? An automated manufacturing process
in which a machine tool is controlled ; – In an ordered sequence
– Along a predetermined path
– To require dimensions
– At a specific feed and speed rate
– Done through a group of alphanumeric instructions
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 3IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
A DefinitionA Definition :: Numerical Control is a system
in which actions are controlled by the direct insertion of numerical data at some point.
The system must automatically interpret at least some portion of the data
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 4IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
MACHINE UNIT
NUMERICAL CONTROLLER
NUMERICAL DATA
(NC CODE)
MANUFACTURINGOPERATOR
PROCESSED PART
Drive Control
04/10/23 5IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
ObjectivesObjectives1. Increased production
2. Reduced labor costs
3. Make production more economical
4. Make production jobs easier
5. Do production jobs that are impossible without numeric control
6. Increased accuracy on duplicate parts
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 6IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Types of Numerical ControlTypes of Numerical Control
Conventional Numerical Control (NC)Conventional Numerical Control (NC) Direct Numerical Control (DNC)Direct Numerical Control (DNC) Computer Numerical Control (CNC)Computer Numerical Control (CNC)
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 7IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Conventional Conventional Numerical Numerical Control (NC)Control (NC)
Data is sent to the machine tool by means of punch cards or tapes. The reader at the machine performs no calculations or interpolations.
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 8IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Direct Numeric Control Direct Numeric Control (DNC)(DNC)
o Is a method where a single computer controls many numerical control machine tools. These machine tools may or may not be of a similar nature
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 9IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Computer Numerical Control Computer Numerical Control (CNC)(CNC)
The idea of computer numerical control is to position a computer right at the machine tool. Most, if not all machine tools that are numericaly controlled are CNC machine tools.
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 10IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Basic Elements of a CNC SystemBasic Elements of a CNC System
COMPUTER
MACHINETOOL
MACHINE CONTROL UNIT
04/10/23 11IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Basic Elements of a CNC SystemBasic Elements of a CNC System
DEFINE GEOMETRY
CREATE TOOL PATH
POST PROCESS TO CREATE CODE
READ CODE TO CONTROLLER
INTERPOLATE CODE INTO DRIVE
FINISHED PART
COMPUTER
MACHINETOOL
MACHINE CONTROL UNIT
04/10/23 12IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Computer Numerical Control (CNC)Computer Numerical Control (CNC)
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 13IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
AdvantagesAdvantageso Reduces time for
delivery of part Reduces scrap rate of material
o Reduces tooling costs
o Reduces layout time
o Increases machine and tool life
o Reduces storage problems
o Less setup time
o Reduces actual machining time
o Allows rapid design changes in part
o Less jigs and fixtures are needed
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 14IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
LimitationsLimitationso High initial investment
Machine tools cost $30,000 - $1,500,000
o High maintenance requirements Maintenance personnel must have both mechanical and electronics expertise
o Not cost-effective for low-level production on simple parts
As geometric complexity or volume increases CNC becomes more economical
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 15IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Industries Most Affected by Industries Most Affected by Numerical ControlNumerical Control
o Aerospace
o Machinery
o Electrical
o Fabrication
o Automotive
o Instrumentation
o Mold making
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 16IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Numerically Controlled Machine ToolsNumerically Controlled Machine Tools
Functionally the same as a conventional machine tool. The difference is in the way in which the various machine functions and slide movements are controlled.
The functions and motions such as ; turning the spindle on and off setting cutting speeds setting feed rate turning coolant on and off moving tool with respect to work part
are performed by Machine Control Unit (MCU) in NC machine tools.
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 17IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
Distributive Numerical Distributive Numerical ControlControl
Because CNC machine tools have the ability to run multiple programs without being attached to a centralized computer this enables a centralized computer to perform many different tasks.
– Line balancing
– Scheduling
– Monitoring
– Quality
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
04/10/23 18IE 447 - CIM Lecture Notes - Chapter 3 Numerical Control
CAD/CAMCAD/CAM
The idea behind CAD CAM is the use of a single technical database by a both design a manufacturing personnel during the product development and production stages.
– CAD systems are used to define part geometries
– CAM systems are used to create cutter paths that can be used by the machine tool.
JURUSAN TEKNIK MESIN dan INDUSTRI JURUSAN TEKNIK MESIN dan INDUSTRI FT - UGM FT - UGM
