Tài liệu CATIA_-_Surface_Machining P1 pdf

3 Axis Surface Machining covers full design-to-manufacture processes offering functions for: defining the areas you want to machine, rough machining either by vertical or horizontal plan

Trang 2

3 Axis Surface Machining is a new generation product that defines and manages NC programs

3 Axis Surface Machining is dedicated to the machining of 3D geometry work parts with 3-axismachining techniques It is particularly adapted to the needs of mold, die and tool makers andprototype manufacturers in all branches and at all levels of industry

3 Axis Surface Machining offers easy-to-learn and easy-to-use shopfloor-oriented tool pathdefinition for 3-axis manufacturing 3 Axis Surface Machining is based on industry-recognized,leading-edge technologies which offer the tightest integration between tool path definition,

verification and instant cycle updates

3 Axis Surface Machining covers full design-to-manufacture processes offering functions for:

defining the areas you want to machine,

rough machining either by vertical or horizontal planes,

detecting residual material,

defining areas to rework,

visualization of the result of the machining program,

the production of shopfloor documentation

3 Axis Surface Machining gives you the freedom to choose the working methods that best suityour needs

MethodologyWhere to find more information

Preface

http://dsfr2e/itprm/doc/CXR7doc/doc/online/smgug/smgugpr01.htm [5/17/2001 3:06:17 PM]

Trang 3

Surface Machining is a versatile application, fully adapted to your needs and your

working methods whether they are machining area-oriented or operation-oriented Youcan either define the machining areas on your part and then assign an operation to each

of them or you can define your machining process as a series of operations with an area

to machine for each operation

A machining area can be:

the whole part (for example, in roughing),

a subset of the faces on the part,

a subset of faces on the part with a limiting contour

The Getting Started chapter contains two sections, one which demonstrates

operation-oriented machining and another which demonstrates area-oriented machining.Before starting work with Surface Machining, please ensure that you have an open file(CATPart or CATProduct) and that you are in the Surface Machining workbench (Start >

NC Manufacturing > Surface Machining)

Here is a suggested order for operations in a machining program:

rough machining operations,(semi-)finishing operations,detection of unmachined areas,reworking of unmachined areas,generation and output of documentation

Area-oriented Area-oriented methodology is useful when you have a complex part

to machine and you know in advance what kind of operation you aregoing to apply to each separate area

This approach is of great use when, for example, you are going tomachine a "family" of similar parts and when you have dedicatedmachines for mass production

You define the areas on one part, you assign an operation to eacharea, and then you machine At the end you have a program that youcan apply to all of the "members" of the "family" at least working costbecause:

the machining strategy has already been defined (chosenoperations),

the tool has already been defined,only the area need be redefined,

Methodology

http://dsfr2e/itprm/doc/CXR7doc/doc/online/smgug/smgugpr02.htm (1 of 3) [5/17/2001 3:06:20 PM]

Trang 4

you know exactly what kind of output you require,and as a result the computation can be run in batch to furtherreduce time loss.

1 Define all of the separate areas to machine on your work piece

2 Select the area or areas you want to machine with a particularoperation

3 Click on the appropriate icon (for example, sweeping)

4 Change the parameters in that operation (if required)

The only mandatory data for a operation is the area to machine (withthe exception of roughing which requires a rough stock too) and all ofthe other parameters have default values

We recommend that you use the default parameters first unless youare sure of the values you wish to enter

5 Compute the operation If the results are satisfactory, repeat steps 2,

3, and 4 for all of the other areas to machine

Operation-oriented Use operation-oriented machining when you want to progressively

define your machining program operation-by-operation sequentially.Each operation has the area it deals with defined as part of its data.This approach is useful for single or limited part production because

it allows you to define your requirements step-by-step

1 Choose the operation you want to use

2 Click the "part" area in the geometric components of the operation

3 Select the area(s) to machine either as the whole part with thecontextual menu or as a face or group of faces with the faceselection wizard

4 Change the other parameters in the operation (if required)

The only mandatory data for a operation is the area to machine (withthe exception of roughing which requires a rough stock too) and all ofthe other parameters have default values

We recommend that you use the default parameters first unless youare sure of the values you wish to enter

5 Compute the operation If the results are satisfactory, continuedefining the remaining operations for your machining program

Methodology

Trang 5

Trang 6

Where to Find More Information

Prior to reading this book, we recommend that you read the Version 5 ManufacturingInfrastructure User's Guide

You will also find useful information on wireframe and surface element creation in the

Wireframe and Surfaces User's Guide

Where to find more information

http://dsfr2e/itprm/doc/CXR7doc/doc/online/smgug/smgugpr03.htm [5/17/2001 3:06:24 PM]

Trang 7

What's new?

General functions

pencil operations

in a part when they are separated by a hole or a gap You can find this option in the sweeping

and contour-driven operations

Enhanced: The stepover options have been enriched with the possibility of defining the

stepover by two points

Part to machine

normal to an axis or parallel/perpendicular to a selected face

This option is intended for use with zig-zag tool path style only

ZLevel

What's new

http://dsfr2e/itprm/doc/CXR7doc/doc/online/smgug/smgugwn.htm (1 of 2) [5/17/2001 3:06:30 PM]

Trang 8

Tool Path Editor

appear in the specifications tree under the operation they belong to

Enhanced: If a tool path is not closed (for example, if you have cut an area out of it), you will

be informed of this by the word open after its name in the specifications tree

New: You can now add approaches or retracts to a tool path via an item in the tool path

contextual menu

What's new

http://dsfr2e/itprm/doc/CXR7doc/doc/online/smgug/smgugwn.htm (2 of 2) [5/17/2001 3:06:30 PM]

Trang 9

Getting Started

http://dsfr2e/itprm/doc/CXR7doc/doc/online/smgug/smguggs01.htm [5/17/2001 3:06:36 PM]

Trang 10

Operation-oriented Machining

Operation-oriented machining is a method where you define each operation one-by-one Whenyou define an operation you decide (using the geometry tab) which areas of the part you want

to machine with that particular operation

This tutorial teaches you how to:

define the operations necessary for the machining of the part below,

run the program to create the tool paths,

check for residual material,

rework the unmachined areas,

and produce an APT file and a workshop document

Entering the workbenchRough machining the partZLevel machining of the outside of a partZlevel machining of the inside walls of a part

SweepingChecking the results of the operations

Creating a rework areaReworking the partGenerating an output fileGenerating workshop documentation

Operation-oriented machining

http://dsfr2e/itprm/doc/CXR7doc/doc/online/smgug/smguggs25.htm (1 of 2) [5/17/2001 3:06:38 PM]

Trang 11

Operation-oriented machining

Trang 12

Entering the Workbench

This task shows you how to open a part and enter the Surface Machining workbench.

1.

Open the SurfaceMachining3.CATProduct file in the samples directory.

2 Select NC Manufacturing > Surface Machining from the Start menu.

The Surface Machining workbench is displayed

The part surrounded by the rough stock is displayed in the Set Up Editor window along with the manufacturing specifications.

3 Select Product1 containing the shape to machine and the rough stock in the specifications tree and display them in wireframe mode using this icon

Entering the workbench

Trang 13

Double click Part Operation.1 in the tree In the dialog box that is displayed, click the design part icon, select the part in the viewer and double click in the viewer to validate your selection and redisplay the dialog box Then click the stock icon, select the rough stock in the viewer and double click in the viewer to redisplay the dialog box

A program must be current before you can insert program entities such as machining

operations, tools and auxiliary commands.

Entering the workbench

Trang 14

Rough Machining the Part

This task shows you how to insert a rough machining operation in the program

As this operation will use the default tool and options proposed by the program, you justspecify the geometry to be machined

1.

Select the Roughing icon

A Roughing.1 entity and a default tool are added to the program

The Roughing dialog box is displayed

The status light on the geometric components tab is red ( ) which means thatyou must select the part geometry in order to create the operation

There are sensitive areas that are colored red in the tab These are areas thatrepresent geometry that must be defined In roughing, they are the part tomachine and the rough stock

2. Hold MB3 down over the red area (do not click) that represents the part

Rough machining the part

Trang 15

Choose Body in the contextual menu The dialog box shrinks to allow you to selectthe part in the viewer

3. In the viewer, click on the part inside the rough stock Double click anywhere in the

viewer to confirm your selection and to redisplay the dialog box The red area inthe geometric area is now green to indicate that the geometry has been selected

4. Click the sensitive area that represents the rough stock The dialog box shrinks to

allow you to select the rough stock in the viewer

5 In the viewer, click on the geometry that defines the rough stock The red area in

the geometric components tab is now green to indicate that the geometry has beenselected

Trang 16

Click OK to close the dialog box.

Now we are going to use ZLevel machining on the walls of the pocket and theoutside of the part

Trang 17

ZLevel Machining of the Outside of a Part

This task shows you how to use ZLevel machining for finishing the outside of the part.Make sure that Roughing.1 is the current entity so that the ZLevel operation will be

inserted after it

To simplify the selection of faces in this task, select Rough Stock in the ProductList and,using the Hide/Show option in the contextual menu, make it invisible Then select Shape

to Machine in the ProductList and display it in shading with edges mode ( )

1

Select the ZLevel machining icon

A Zlevel.1 entity is added to the program

The Zlevel dialog box is displayed

Zlevel machining of the outside of a part

Trang 18

2 Click the sensitive red area The dialog box shrinks and the face selection wizard isdisplayed.

Select all of the walls that form a belt around the part Click OK

The dialog box is redisplayed and the red area is now green

In the viewer, the edges around the selected faces are highlighted

Trang 19

3 Click the check element in the sensitive icon and select the upper face of the part.

Click OK to close the dialog box

The operation you have just created should still be the current entity Now we aregoing to define the ZLevel machining of the pocket

Trang 20

ZLevel Machining of the Inside Walls of a

Select the ZLevel machining icon

A Zlevel.2 entity is added to the program

The Zlevel dialog box is displayed

Zlevel machining of the inside walls of a part

Trang 21

Select all of the faces that form the inside wall of the pocket Click OK

In the viewer, the edges around the selected faces are highlighted

Click OK to close the dialog box

The operation you have just created should still be the current entity

Now we are going to define a sweeping operation for the top surface of the part andthe bottom of the pocket

Trang 22

Trang 23

This task shows you how to use sweeping for finishing the part

You are going to define two separate operations one for the top surface and another forthe bottom of the pocket

Make sure that ZLevel2 is the current entity so that the sweeping operation will be

inserted after it

1

Select the Sweeping icon

A Sweeping.1 entity is added to the program

The Sweeping dialog box is displayed

Machining with parallel contours

Trang 24

Select the top surface of the part Click OK

In the viewer, the edges around the top surface are now highlighted

3 Click Replay

4 The tool path is displayed and the display and analysis dialog box is called up.Click OK

5 The operation you have just created should still be the current entity

Repeat all of the above steps for the bottom surface of the pocket

Machining with parallel contours

Trang 25

Checking the Result of the Operations

This task shows you how to visually check the machined part resulting from the toolpaths for the operations you defined in your machining program

Your specification tree

should look like this

1 Select Manufacturing Program.1

Computing the toolpath

Tiêu đề	Surface Machining
Trường học	Dassault Systèmes
Chuyên ngành	Surface Machining
Thể loại	Hướng dẫn
Năm xuất bản	2001
Thành phố	Vélizy-Villacoublay

Định dạng
Số trang	30
Dung lượng	281,5 KB