SUBMITTED BY VISHAL PACHORI DEPT. OF MECHANICAL ENGG. GLA UNIVERSITY MATHURA

COMPANY PROFILE Name of industries:- Hydraulic power solution, Plot no. 39, balaji complex Sec.- 23, faridabad Haryana, india Ph.: Website: Contact Person:- Rahul Sharma Designation : Senior Engineer Contact no.: Department : CNC

PRODUCT OF COMPANY Hoses Assemblies Hose End Fittings Hoses hydraulic Tube Assemblies Flexible Metal Assemblies Adaptors SAE Flanges Tube Fittings Quick Release Couplings Spiral Sleeves & Spring Gaurd Hose Clamps Minimess Hoses & Fittings Hose Crimping Machines

Overview of Presentation CNC Introduction Apllications of CNC Elements of CNC Machine How CNC Works Programming Key Letters Table of Important M codes Table of Important G codes Cutting tools and its Characteristics Types of Tool materials Inserts

CNC Introduction A numerical control system in which the data handling, control sequences, and response to input is determined by an on-board computer system at the machine tool.

Apllications of CNC CNC is widely used for:- lathe, drill press milling machine grinding unit laser sheet-metal press

Elements of CNC Machine Input Device Machine Control Unit Machine Tool

Elements of CNC Machine Input Device:- In computing, an input device is a peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or information appliance. Examples of input devices include keyboards, mouse, scanners, digital cameras Machine Control Unit:- The machine control unit (MCU) is the heart of a CNC system. It is used to perform the following functions: To read the coded instructions. To decode the coded instructions. To implement interpolations (linear, circular, and helical) to generate axis motion commands Machine Tool :-machine tool is the mechanical device that perform actual machining operation like- cutting,drilling., facing, milling, knurling, grindin etc

How CNC Works Controlled by G and M codes. These are number values and co-ordinates. Each number or code is assigned to a particular operation. Typed in manually to CAD by machine operators. G & M codes are automatically generated by the computer software.

Programming Key Letters O - Program number (Used for program identification) N - Sequence number (Used for line identification) G - Preparatory function X - X axis designation Y - Y axis designation Z - Z axis designation R - Radius designation F – Feed rate designation S - Spindle speed designation H - Tool length offset designation D - Tool radius offset designation T - Tool Designation M - Miscellaneous function

Table of Important M codes M00 Program stop M01 Optional program stop M02 Program end M03 Spindle on clockwise M04 Spindle on counterclockwise M05 Spindle stop M06 Tool change M08 Coolant on M09 Coolant off M30 Program stop, reset to start

Table of Important G codes G00 Rapid Transverse G01 Linear Interpolation G02 Circular Interpolation (CW) G03 Circular Interpolation (CCW) G33 Thread cutting G78 Thread cutting cycle G43 Tool length compensation (plus) G44 Tool length compensation (minus) G49 Tool length compensation cancel G81 Drilling cycle G90 Absolute positioning G91 Incremental positioning

Cutting tools and its Characteristics Cutting tool is a device, used to remove unwanted materials from given work piece for carrying out the machining process, cutting tool is fundamental and requirement A cutting tool must have the following characteristics:  Hardness  Hot Hardness  Toughness

Types of Tool materials High Speed Steel (HSS) High Carbon Steel (HCS) Cast Alloy Cemented Carbide Ceramic Diamond Cobalt

Inserts Inserts are removable cutting tips, which means they are not brazed or welded to the tool body. The strength of the inserts also depends upon the shape of the inserts.

Advantages of CNC i.- Easier to program; ii.- Easy storage of existing programs; iii.- Easy to change a program iv.- Avoids human errors v.- CNC machines are safe to operate vi. - higher productivity, better quality vii.-Volume of production is very high viii. -Less paper work

Disadvantage of CNC i. -Costly setup, skilled operators ii. - Computers, programming knowledge required iii. - Maintenance is difficult

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