Pro NC wildfire 3 0 tutorial kho tài liệu bách khoa

Manufacturing Model A regular manufacturing model consists of a design model also called a "reference part" because it is used as a reference for creating NC sequences and a workpiece a

• Understand the different models used in manufacturing

• Merge a design part and a workpiece to create a manufacturing model

• Implement machining setup elements

• Understand and set manufacturing parameters

• Set a tool’s parameters

• Create tool paths

• Run simulations of tool paths

• Utilize NC Check to analyze NC sequences

Pro/NC

Pro/NC (Fig NC.1 and NC.2) will create the data necessary to drive an NC machine tool to machine a Pro/E part It does this by providing the tools to let the manufacturing engineer follow a logical sequence of steps

to progress from a design model to ASCII CL data files that can be post-processed into NC machine data

The following is an overview of terms that will be used throughout this lesson These are basic Pro/NC concepts that are vital to understanding the module Pro/NC (Fig NC.3) is designed to map your manufacturing intent, as captured by the NC sequence parameters, onto geometry selected from the engineering part (design model) Throughout this lesson, the appropriate settings will be described and the techniques displayed to make this mapping clear

Figure NC.3 COAch for Pro/E, Milling, Manipulating a Mill Path

Design Model

The Pro/E design model, representing the finished product, is used as the basis for all manufacturing operations Features, surfaces, and edges are selected on the design model as references for each tool path Referencing the geometry of the design model (Fig NC.4 and Fig NC.5) sets up an associative link between the design model and the workpiece Because of this link, when the design model is changed, all associated manufacturing operations are updated to reflect the change Parts, assemblies, and sheetmetal parts may be used as design models

Figure NC.4 Design Part (Hidden Line) Figure NC.5 Design Part (Shaded)

Workpiece

The workpiece represents the raw stock that is going to be machined by the manufacturing operations Its

use is optional in Pro/NC The benefits of using a workpiece include:

• Automatic definition of extents of machining when creating NC sequences

• Dynamic material removal simulation and gouge checking (available with Pro/NC-CHECK)

• In-process documentation by capturing removed material

The workpiece can represent any form of raw stock: bar stock, casting (Fig NC.6), etc Copying the design model and modifying the dimensions or deleting/suppressing features to represent the real workpiece may easily create it

As a Pro/E part, the workpiece can be manipulated as any other part: it can exist as an instance of a part family table; and it can be modified, redefined, etc

Figure NC.6 Workpiece

Manufacturing Model

A regular manufacturing model consists of a design model (also called a "reference part" because it is used

as a reference for creating NC sequences) and a workpiece assembled together (Fig NC.7) As the manufacturing process is developed, the material removal simulation can be performed on the workpiece Generally, at the end of the manufacturing process, the workpiece geometry should be coincident with the geometry of the design model However, material removal is an optional step

When a manufacturing model is created, it generally consists of four separate files:

• The design model (machine detail info) filename.prt

• The workpiece (stock or casting detail info) filename.prt

• The manufacturing model assembly-manufacturename.asm

• The manufacturing process file-manufacturename.mfg

Figure NC.7 Manufacturing Model (Hidden Line and Shading)

Part and Assembly Machining

There are two separate types of Pro/NC:

• Part machining Acts on the assumption that the manufacturing model contains one reference part

and one workpiece (also a part) Multi-part allows you to assemble multiple design models or reference models, but they are automatically merged upon assembly so that the manufacturing model still consists of one reference part and one workpiece (Fig NC.8)

• Assembly machining No assumptions is made by Pro/E as to the manufacturing model configuration

The manufacturing model can be an assembly of any level of complexity (with subassemblies, etc.), and it can contain any number of independent reference models and/or workpieces It can also contain other components that may be part of the manufacturing assembly but have no direct effect

on the actual material removal process (e.g., the turntable, clamps, etc.)

Once the manufacturing model is created, Part and Assembly machining use similar techniques to develop the manufacturing process If there are specific techniques for defining an NC sequence, they will

be described where appropriate Keep in mind that in Part machining, Pro/E automatically determines some

of the machining aspects based on the workpiece geometry; therefore, although Assembly machining gives you more flexibility in building the manufacturing model, it may also require extra steps when creating the

NC sequences The major difference between Part and Assembly machining is that in Part machining all the

components of the manufacturing process (operations, workcells, NC sequences, etc.) are part features that

belong to the workpiece, whereas in Assembly machining these are assembly features that belong to the manufacturing assembly

Figure NC.8 Adjustable Guide Manufacturing Model CL Data

Adj-Guide9.1 Adjustable Guide, Casting and Machine Part

Adj-Guide9.1 Adjustable Guide

Adjustable Guide

The Adjustable Guide casting (Adj-Guide 9.1) is a simple part, so the process of describing systematic commands and tools will start with the creation of the rib The rib, created in the casting model, will have a relation added to it to control its location The relation will keep the rib centered on the rectangular side of the part The rounds are added late in the modeling process, for they can cause the model to fail in many cases The process of fixing the part, so that the rounds do not make the regeneration fail, is also described [Adj-Guide 9.2(a) and (b)]

Adj-Guide9.2 (a) Manufacturing Model Adj-Guide 9.2(b) NC Sequence and a CL File

The difference between the two files is the difference between the volume of the casting part and the volume

of the machined part The removed volume can be seen as material removal when you are performing an NC Check operation on the manufacturing model If the machining process gouges the part, the gouge will be displayed as cyan The cutter location (CL) can also be displayed as an animated machining process [Adj-Guide 9.2(b)]

Adj-Guide 9.4 Adjustable Guide Casting Drawing

Sketch the section in the second quadrant, not in the first quadrant as was done for most of the other lessons Note the location of the coordinate system Pay particular attention to the tangencies

Adj-Guide 9.6(c) Sketch Section (Parallel to the Screen)

Adj-Guide 9.6(d) Sketch Section Shown in Trimetric

Adj-Guide9.6 (e) Depth of First Protrusion

Adj-Guide9.6 (f) Dimensions Shown in the Standard Orientation

Adj-Guide 9.6(g) Completed Protrusion

Model the second protrusion

Adj-Guide9.7 (a) Add the Reference

Adj-Guide 9.17(b) Sketch One Concentric Circle

Adj-Guide 9.7(c) Depth of the Second Protrusion

Adj-Guide 9.7(d) Completed Protrusion

Create a R2 round along the top edge

Adj-Guide 9.8(a) Select Each Edge, RMB, Round Edges

Adj-Guide 9.8(b) Move Drag Handle to 2.000

Adj-Guide 9.9 Model and Model Tree

Create a datum plane, offset from datum plane B, 30mm

Adj-Guide 9.10(a) Create an Offset Datum Plane

Adj-Guide 9.10(b) DTM1

Write a relation to control the position of the DTM1 The datum (and its children) must remain entered on the protrusion (60mm), regardless of modifications during an ECO change

Adj-Guide9.11 (a) Select the First d Symbol Dimension

Adj-Guide 9.11(b) Select the Second d Symbol Dimension and Complete the Relation

Adj-Guide 9.12 Relation Table

The sketch of the rib will require just one tangent line between the large circular protrusion and the round along the part’s upper edge Zoom in to see the tangent position correctly

Adj-Guide 9.13(a) Sketch Plane DTM1

Adj-Guide 9.13(b) Add the First Reference (Protrusion)

Adj-Guide 9.13(c) Add the Second Reference (Round)

Adj-Guide 9.13(d) Pick Starting Point for Tangent Line

Adj-Guide9.13 (e) Pick Ending Point for Tangent Line

Adj-Guide 9.13(f) Completed Section Sketch

Adj-Guide9.13 (g) Standard Orientation

Adj-Guide9.13 (h) Rib Thickness and Direction Displayed

Adj-Guide 9.13(i) Completed Rib

Adj-Guide 9.14(a) Round Edges

Adj-Guide 9.14(b) Radius 2.000 Round

Adj-Guide 9.14(c) Completed Round

Adj-Guide 9.14(d) Round Edges

Adj-Guide 9.14(e) Round R2.00

Adj-Guide 9.14(f) Set 1Round

Adj-Guide 9.14(g) Add a Set Adj-Guide 9.14(h) Add Set 2

Adj-Guide 9.14(i) Set 2

Adj-Guide 9.14(j) Round Edges

Adj-Guide 9.14(k) Completed Round

Adj-Guide 9.14(l) Round Edges

Adj-Guide 9.14(m) Completed Round

Adj-Guide 9.14(n) Round Edges

Adj-Guide 9.14(o) Set 1Round

Adj-Guide 9.14(p) Adding a Set

Adj-Guide 9.14(q) Set 2

Adj-Guide 9.14(r) Set

Adj-Guide9.14(s) Add Corner Tangent Round Adj-Guide 9.14(t) Create Edge Round

Adj-Guide 9.14 (u) Circular Round Adj-Guide 9.14(v) Completed Circular Round

Adj-Guide9.15 Completed Rounds (Completed Casting-Workpiece)

The “machined” features of the part can be created with a cut to “face” the end of the cylindrical protrusion, a cut on the top, a counterbored hole, and a thru hole with two counterbores (created with a revolved cut) Use the machine detail (Adj-Guide 9.16) for the dimensions

Adj-Guide 9.16 Adjustable Guide Machining Drawing

Cut the front face of the cylindrical protrusion from 80mm to the design size of 75mm Create and use DTM2

as the sketching plane [Adj-Guide 9.17(a)] Only one reference is required, the cylindrical surface Sketch a concentric circle No dimensions are necessary [Adj-Guide 9.17(b)]

Adj-Guide 9.17(a) Offset a new Datum Plane (DTM2) from Datum B (75mm)

Adj-Guide9.17 (b) Completed Cut

Before continuing, edit the R2 round [Adj-Guide 9.18(a)] to the design size of R12 [Adj-Guide 9.18(b)]

Adj-Guide 9.19 (a) Slot/Cut Sketch Plane (DTM3), 30mm from Datum A

Adj-Guide 9.19(b) Slot/Cut Dimensions

MMB spin the model (Adj-Guide 9.20) and save the view

Adj-Guide 9.20 Spin the Model and Save the View

Adj-Guide 9.21(a) Standard Hole Options

Adj-Guide 9.21(b) Hole Placement

Adj-Guide 9.21(c) Counterbore Hole Placed on Bottom Surface Adj-Guide 9.21(d) Hole Positioned to Design Values

Adj-Guide9.21(e) Hole Dashboard

Adj-Guide9.21 (f) Completed Hole (with incorrect note)

Usually you would simply turn off the threads by toggling off the taped hole option: Taps the drilled hole The method used here was used so that manual editing of the note/callout and the hole’s shape could be introduced

Adj-Guide 9.22(c) Note Dialog Box (your note number will be different) Adj-Guide 9.22(d) Text Symbol Click: >type &d226 (your d symbol will be different) >Enter > > >type &d227 (your d symbol will be different) >Enter > >type &d225 (your d symbol will be different) >type FROM FAR SIDE [Adj-Guide 9.22(e)]

>OK > Environment > >OK > (Adj-Guide 9.23) > >MMB

Adj-Guide 9.22 (e) Edit Note (your d symbols will be different)

Adj-Guide 9.23 Completed Counterbore Hole

For the last feature, you will need to create a datum plane through the axis of the cylinder (A_5) and parallel to datum C for the sketching plane

Adj-Guide 9.24(a) New Datum Plane Set to be Through A_5

Adj-Guide 9.24(b) New Datum Plane Set to be Parallel to Datum C

Adj-Guide 9.24(c) Completed Datum Plane DTM4

Adj-Guide 9.25(a) Cut Sketch Plane DTM4, Sketch Orientation- Datum A

Adj-Guide 9.25(b) References

Adj-Guide 9.25(c) Section Sketch

Adj-Guide 9.25(d) Section Sketch Rotated

Adj-Guide 9.25(e) Cut Direction Adj-Guide 9.25(f) Completed Cut

Adj-Guide 9.26(b) Switch Dimensions to Symbols for the Hole

Adj-Guide 9.26(c) Add New Relation

Adj-Guide 9.26(d) Relations and Parameters Information

Add one instance, click: Insert a new instance at the selected row

Adj-Guide 9.27(c) Family Table with Family Items

Adj-Guide 9.27(d) New Row and Instance Rename the Instance

Adj-Guide 9.27(e) Rename the Instance to ADJ_GUIDE_CASTING and choose N for all of its Family Items

A Family Table controls whether a feature is present or not for a given design instance, not whether a feature

is displayed, as with the layer display function

Adj-Guide 9.27(f) Design (Machined) Part (Instance: GENERIC), Workpiece (Casting) Part (Instance: ADJ_GUIDE_CASTING)

You now have two separate instances, a casting (workpiece) and a machined part (design part) During the manufacturing process, the workpiece is merged (assembled) into the design part thereby creating a manufacturing model The difference between the two files is the difference between the volume of the casting and the volume of the machined part During the design of a typical part there are many modifications made to the design The ability to make changes without causing failures is important “Flexing” the model, changing and editing dimension values to see if the model integrity withstands these modifications, establishes how robust your design is

Adjustable Guide Machining Steps

(Name file as desired) OK

Open

RMB > Default Constraint > Enter

> Open

RMB > Default Constraint

Enter

> File > Exit

> Datum coordinate system tool from Right side tool

chest

> pick the front face of the model

> hold down the Ctrl key and pick the side face of the model

> hold down the Ctrl key and pick the top face of the model

> OK

> OK

OK > Done/Return >

> Mill Volume Tool > Extrude Tool > RMB > Define Internal Sketch

> Datum Plane Tool >

> Rectangle Tool

> Standard Orientation >

MMB to complete the feature

> >

> Apply > Close

> OK > Done/Return > Done/Return > File > Save > MMB

> OK

> Close

> OK

> File > Save > MMB

Alternative Machining Projects

Casting

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Casting

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