CNC

Lab. 05 Academic Year 2012/2013

COMPUTER AIDED MANUFACTURING

Prismatic Machining (1) – 3-Axis Milling

FACE

MILLING

Computer Aided Manufacturing

CAM Introduction GOAL and Outline

GOAL:

• 3-Axis Milling Definition

• 3-Axis Milling for Prismatic Machining (Prismatic Surface)

Outline:

• Machining (CAM) setup

• NC Machine Definition

• Creation of a Group of Operations

• Create a Facing operation


CAM Manufacturing Cycles – General Machining

Manufacturing Cycle

Turning Phase

Cylindrical Turning

Facing 1st Pos.

2nd Pos.

Cylindrical Turning

Centering Facing

Hole Making

PHASE SUB-PHASE OPERATIONS

Milling Phase

1st Pos. Flattening

Contouring

Grinding Phase

1st Pos. Internal Cylindrical Grinding

Main

Machining

Types

Changing Part

Position (Re-Set up

part and fixture)

Changing Operation in the same

Position (no re-set up part and

fixture)


CAM

Blocking and

Positioning

(Fixturing)

Sequence of

machining

Tools: Material, Shape,

dimension, etc

Cutting

Parameters: MRR, Cutting Speed, Cutting Force,

Cutting Power, etc

Machining Planning

Element of Machining Planning


CAM

Blocking and

positioning

Sequence of

machinings

Tools Cutting

paramters

Machining Planning

Element of Machining Planning

For each sub-phase


CAM

• NC Manufacturing create and manage data required to drive the tools

during the machining of the working part (workpiece – RAW).

• This is possible following a sequence of steps starting from the model of

the final part to the output, a CL ASCII file. Next, the final NC Code for

specific CNC machine come from post-processind the CL file (Post

Processor).

CAM - NC Manufacturing


CAM CATIA – Assembly Design

Start from the 1st Machining Product = 1st placement


CAM

Create a plane

Elements of Reference

NC-Manufacturing


CAM NC-Manufacturing


CAM

NC-Manufacturing

• Planes of transition/ rotation.

Function: safety plane, trajectory planning, etc.


CAM

CATIA – CAM: NC Manufacturing

Manufacturing Product

Settings of the group of

operations (Phase)

Set-up of machining

programs

Definition of working

operations /Tool

Creation of CL data

(APT)

Post-Processor

Start NC macchine Tool

Working part (RAW) Design Part

Equipment

Tools

NC Machines

Production of the

model

Process

Product


CAM



operations (Phase)

Set-up of machining

programs


operations /Tool

Creation of CL data

(APT)

Post-Processor



Equipment

Tools

NC Machines

Production of the

model

Process

Product

CATIA – CAM: NC Manufacturing


CAM

Manufacturing

Model

Setting of the

group of

Operations

(Manufacturing

Program)

Equipment

Planes

NC Machine

Manufacturing Setup of the Group of Operation

(Part Operation)

CATIA – CAM: Prismatic Machining


CAM CATIA – CAM: Prismatic Machining

Prismatic Machining create data required to drive tools

in a 2,5D machining process for prismatic surface.


CAM

Start > NC Manufacturing > Prismatic Machinig



CAM

File of the

manufacturing

process

name.CATProcess

Files of the

Manufacturing

Product

name.CATProduct



CAM CATIA – NC Manufacturing

The Manufacturing Workbench

Process Tree

Process List

Products

Other Elements • Tools

• Parameters

• Materials

• … Machining Reference

system


CAM

Setup of the Manufacturing Program (Group of operations)



CAM CATIA – NC Manufacturing

Definition of:

• NC Machine

• Reference System of the Machine

• Manufacturing Product to be used in the actual setup

Selection of:

• Design model

• Work piece (part to be machined)

• Equipment (fixturing system)

• Reference and security planes / sizes

• Transition/Rotation planes

• …


CAM



operations (Phase)

Set-up of machining

programs


operations /Tool

Creation of CL data

(APT)

Post-Processor



Equipment

Tools

NC Machines

Production of the

model

Process

Product



CAM

Definition: NC Machine


Double click


CAM

Definition: NC

Machine


With 1

rotational table

will create 4-

axis milling


CAM

Definition: NC Machine



CAM

Definition: Axis of the NC Machine



CAM

Definition: Manufacturing Product



CAM

Selection:

•Design model

•Work piece

•Fixturing elements

•Sizes/security planes

•Transition/Rotation planes



CAM

Selection: designed part, RAW part, safety plane, fixturing system



CAM

Insert a facing operation in a Opertions group:

- Select the facing operation

- Indicate (select) the machining program


The Most Common Operation


CAM CATIA – CAM: Prismatic Machining


CAM

Geometries and surfaces definition

- Auxiliaries (not mandatory)

- Mandatory

(Main-red)



CAM

Surface to be machined

- Face or surface

- Possible offset

Lateral bound

- To be closed

- detection:

automatic (contour detection)

manual (edge detection)

- Possible offset

Main Geometries



CAM

Element to be not

machined

Upper plane (the

reference for the

step depth

evaluation)

Starting Point



CAM

Select the surface

to produce



CAM

Lateral boundary

Upper plane



CAM

Tool definition



CAM

Cutting

parameters



CAM

Cutting (Machining) Strategy – Tool-path options



CAM

- Play option

- Video Option

- Analyze / verify

- Tool-path info

Visualize the tool-path



CAM

Visualize the tool-path:



CAM

Visualize the entire tool-path:



CAM

Summary of the Lesson

Prismatic Machining (1):

Manufacturing Programming:

• Define reference elements

• Define Machines

• Define and select products

• Setup of a Manufacturing Program

• Create a Facing Operation

• Tool Definition

• Tool-path preview

• Machining simulation

CNC

Documents

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