LAB 11

Department of Mechanical Engineering

Machine Design & CAD-II Lab

Submitted by: Saad Mubeen

Submitted to: Engr. Adnan Rasheed
Registration no. ME-171066

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Modify solid work command

1.0 Objective
To exercise the split line feature, draft feature and Boundary Base/ cut feature.

2.0 Split line feature command

The Split Line tool projects an entity (sketch, solid, surface, face, plane, or surface spline) to
surfaces, or curved or planar faces. It divides a selected face into multiple separate faces. You can
split curves on multiple bodies with one command.
You can create the following split lines:
Projection Projects a sketch on a surface. You can pattern split line features that were created
using projected curves.

You can create split lines using sketched text. This is useful for creating items such
as decals.

Silhouette Creates a split line on a cylindrical part.

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Intersection Splits faces with an intersecting solid, surface, face, plane, or surface spline.

When you create a split line with an open profile sketch, the sketch must span at least two edges
of the model.

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CONTENTS
Split Line Creation
When you create split lines, unchanged edges are reusable in downstream features and changed
edges update.
Supported features:
 Chamfers
 Drafts
 Fillets
 Shells
For example, in this model you insert a split line on the front face as the last item in the Feature
Manager design tree. If you reorder Split Line1 to follow the Extrude1 feature, the model retains
the downstream chamfer and fillets.

Creating Projection Split Lines

To create a projection split line:

1. Click Split Line (Curves toolbar) or Insert > Curve > Split Line.

2. In the Property Manager, under Type of Split, select Projection.

3. Under Selections, click:

 A sketch for Sketch to Project . You can select multiple contours from the same
sketch to split.
 The faces to project the sketch onto for Faces to Split .
 Single direction to project the split line in only one direction.

4. Click .

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Before After

Creating Silhouette Split Lines

To create a silhouette split line:
1. Click Split Line (Curves toolbar) or Insert > Curve > Split Line.
2. In the Property Manager, under Type of Split, click Silhouette.
3. Under Selections:
 Select a plane to project through the model's silhouette (outer edges) for Direction of
Pull .
 Select the faces to project the plane onto for Faces to Split . The faces cannot be
planar.
 Set the Angle to create a draft angle.
4. Click .

Creating Intersection Split Lines

To create an intersection split line:

1. Click Split Line (Curves toolbar) or Insert > Curve > Split Line.

2. In the PropertyManager, under Type of Split, select Intersection.

3. Under Selections:

a. Select splitting tools (intersecting solids, surfaces, faces, planes, or surface splines)
for Splitting Bodies/Faces/Planes .
b. Click in Faces/Bodies to Split , and select the target faces or bodies on which to
project the splitting tool.

4. Select Surface Split Options:

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Split all Natural Linear

5. Click .

3.0 Draft feature command

Draft tapers faces using a specified angle to selected faces in the model.
One application is to make a molded part easier to remove from the mold. You can insert a draft
in an existing part or draft while extruding a feature. You can apply draft to solid or surface models.
You can also apply a draft angle as a part of an extruded base, boss, or cut.

You can specify the following types of draft:

 Neutral plane. You can create neutral plane drafts manually or by using the DraftXpert.
 Parting line
 Step draft
To draft a model face:

1. Click Draft (Features toolbar) or Insert > Features > Draft.

2. Set the options in the Property Manager.

Click Detailed Preview to preview the draft.

3. Click OK .

CONTENTS
 Draft Property Manager
 The Draft Property Manager appears when you create or edit a draft feature.
 The Property Manager displays the appropriate options based on the type of draft you
create. The Property Manager remembers its last used state.
 Two Property Manager toggle buttons are available:

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Manual Use this Property Manager to maintain control at the feature level.

Draft (Neutral plane drafts only). Use this Property Manager when you want the
pert SOLIDWORKS software to manage the structure of the underlying features.

 When you edit a draft using Edit Feature, the Draft Property Manager appears with no
toggle buttons.

Types of Draft
 Select a draft type: Neutral Plane, Parting Line, or Step Draft.

Allow reduced (Parting Line only). Allows you to create a draft when the sum of the angle
angle produced by the maximum angle and the Draft Angle is 90° or greater.

Tapered steps (Step Draft only). Creates the surfaces in the same manner as the tapered
surfaces.

Perpendicular (Step Draft only). Creates the surfaces perpendicular to the original main face.
steps

Example: Tapered and Perpendicular Draft Steps

Draft Angle
Some fields that accept numeric input allow you to create an equation by entering = (equal sign)
and selecting global variables, functions, and file properties from a drop-down list. See Direct
Input of Equations in Property Managers.

Draft Angle Sets the draft angle, measured perpendicular to the neutral plane.

 Neutral Plane
Neutral Select a planar face or a plane feature. If necessary, select Reverse direction to
Plane slant the draft in the opposite direction.

 Faces to Draft (Neutral Plane only)

Faces to Draft Select the faces to draft in the graphics area.

Face Propagates the draft across additional faces. Select an item:

Propagation

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None Drafts only the selected faces.

Along Extends the draft to all faces that are tangent to the
Tangent selected face.

All Faces All Faces

Inner Faces Drafts all inner faces extruded from the neutral plane.

Outer Faces Drafts all outer faces next to the neutral plane.
Example: Face Propagation Using Neutral Plane as Type of Draft

 Direction of Pull
Direction of (Parting Line or Step Draft only). Indicates the direction of pull. Select an edge or
Pull face in the graphics area. Note the arrow direction, and click Reverse Direction if
desired.

 Parting Lines (Parting Line or Step Draft only)

Parting Lines Select the parting lines in the graphics area.

Other Face Allows you to specify a different draft direction for each segment of the
parting line. Click the name of the edge in the Parting Lines box, and
click Other Face.

Face Propagates the draft across additional faces. Select an item:

Propagation
None Drafts only the selected face.

Along Extends the draft to all faces that are tangent to the selected
Tangent face.

DraftXpert
The DraftXpert manages the creation and modification of neutral plane drafts. The DraftXpert
takes trial and error out of the draft process.
You select the draft angle and references to draft, and the DraftXpert manages the rest, which can
include automatically reordering draft features before adjacent fillets. See also Xperts Overview.

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The DraftXpert can:

 Create multiple drafts
 Create multiple drafts
 Create multiple drafts
 Automatically invoke the FeatureXpert to resolve draft features that do not initially go into the
model easily
Use the Add tab to create new draft features or the Change tab to modify draft features.
Use the DraftXpert when you want the SOLIDWORKS software to manage the structure of the
underlying features. Use the manual Draft PropertyManager when you want to maintain control at
the feature level.

The following procedures demonstrate various uses of the DraftXpert using this sample model.

To access the Draft pert:

1. Click Draft (Features toolbar) or Insert > Features > Draft.
2. In the Property Manager, click Draft pert.

CONTENTS
Creating Multiple Drafts Using Draft pert
Changing Draft Using Draft pert
Draft pert Property Manager - Add
Draft pert Property Manager - Change

Neutral Plane Draft

You can create a feature that tapers selected model faces by a specified angle, using a Neutral
Plane to determine the direction of pull for creating molds. You can also use the DraftXpert to
create, change, or remove neutral plane drafts.
You can also apply a draft angle as a part of an extruded base, boss, or cut.

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To draft a model face to a neutral plane:

1. Click Draft on the Features toolbar, or Insert > Features > Draft.
2. In the Property Manager, click Manual to display the Draft property Manager.
3. In the property Manager:
a. Select Neutral Plane in Type of Draft.
b. Under Draft Angle , set a value for the number of degrees. The draft angle is
measured perpendicular to the neutral plane.
c. Select a face or a plane for Neutral plane. If necessary, select Reverse
direction to slant the draft in the opposite direction.
d. Select the faces to draft in the graphics area for Faces to draft .
e. Select an item in Face Propagation if you want to propagate the draft across
additional faces.
Click Detailed Preview to preview the draft.

f. Click OK to create the draft.

Parting Line Draft

You can draft surfaces around a parting line. The parting line can be non-planar. In a draft using
a parting line, you can also include a Step draft.
To draft on a parting line, you can first divide the faces to be drafted by inserting a split line, or
you can use an existing model edge. Then you specify the direction of pull, or the side of the
parting line from which material is removed.
You can check the draft angles on your model using the draft analysis tool. Draft analysis creates
a color-coded rendition of the model faces based on the angle and the direction of pull criteria
that you specify.
To insert a draft angle parting line:

1. Sketch the part to be drafted.

2. Insert a split line curve, if desired.

3. Click Draft on the Features toolbar or click Insert > Features > Draft.

4. Under Type of Draft, select Parting Line.

Under some conditions, select the Allow reduced angle check box. For more information,
see Allow Reduced Angle Option below.

5. Under Draft Angle, enter the Draft angle .

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6. Under Direction of Pull, select an edge or face in the graphics area to indicate the
direction of pull.

Note the arrow direction, and click Reverse Direction if desired.

7. Under Parting Lines , select the parting lines in the graphics area.

Note the arrow direction. To specify a different draft direction for each segment of the
parting line, click the name of the edge in the Parting Lines box, and click Other Face.

First draft direction Other Face selected

In this example, all parting lines were selected, using the same face.

8. Choose the Face propagation type:

None Draft only the selected face.

Along Tangent Extend the draft to all faces that are tangent to the selected face.

9. Click OK .

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Draft applied with first direction Draft applied with Other Face

Allow Reduced Angle Option

The Allow reduced angle check box is available only with Parting Line draft.
When you select this option, the draft angle on some portions of the drafted face may be smaller
than the specified draft angle.

Use the Allow reduced angle check box under the following condition:
 The normal of one or more side faces adjacent to the edge and the faces being drafted is nearly
perpendicular to the Direction of Pull. With this model type and condition, select the Allow
reduced angle check box when the maximum angle between the pull direction and the normal
of the steep face, plus the draft angle, is greater than or equal to 90°.

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The vertical blue arrow represents the Direction of Pull

(Top plane). The red arrow represents the surface normal
at its maximum angle to the pull direction.

When the sum of the angle produced by the maximum

angle and the Draft Angle is 90° or greater, select
the Allow reduced angle check box to create the draft.

Draft applied (Draft Angle is 25°). The image above displays the same 25° draft applied.
However, it is enhanced by applying an offset face and
displaying curvature on the offset face.

In this example, the draft angle towards the narrow ends of the drafted face is reduced below the
specified 25° to create the draft.

Parting Line with Step Draft

A step draft is a variation of a parting line draft. The step draft creates one face rotated about the
plane used as the Direction of Pull. This results in small faces, representing the steps (highlighted
in blue in the example below).

Model with parting line

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Parting line draft Parting line with step draft

You can check the draft angles on your model using the draft analysis tool. Draft analysis creates
a color-coded rendition of the model faces based on the angle and the direction of pull criteria that
you specify.
To insert a draft angle using parting line with step draft:

1. Sketch the part to be drafted.

2. Create a plane.

3. Create the desired parting line. Make sure that:

 At least one parting line segment is coincident to the parting plane on each draft face.
 All other parting line segments are in the pull direction of the plane.
 None of the parting line segments are perpendicular to the plane.

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4. Insert a split line curve.

5. Click Draft on the Features toolbar or click Insert > Features > Draft.

6. Under Type of draft, select Step Draft.

 Select Tapered steps if you want the surfaces to generate in the same manner as the
tapered surfaces.
 Select Perpendicular steps if you want the surfaces perpendicular to the original main
face.

7. Under Draft Angle , enter the number of degrees.

8. Under Direction of Pull:

 Select a plane to indicate the direction of the pull.

 Select Reverse direction to slant the draft in the opposite direction.

9. Under Parting Lines :

a. Select the parting line segments in the graphics area. Note the direction of the
preview arrow.
b. Click Other Face to specify a different draft direction for each segment of the parting
line.
c. Select a type in Face propagation:
None Draft only the selected face.
Along Extend the draft to all faces that are tangent to the selected face (faces
Tangent that meet with fillets or rounds.)

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10. Click OK .

4.0 Boundary base/cut feature command

You can specify sketch curves, edges, faces, or other sketch entities to control the shape of a
boundary feature.
When you select entities to define the boundary feature in two directions, you can select curves
influence options that control how the selected entities influence the design.
To open the Boundary Property Manager, do one of the following:
 Click Boundary Boss/Base (Features toolbar) or Insert > Boss/Base > Boundary.
 Click Boundary Cut (Features toolbar) or Insert > Cut > Boundary.
 Click Boundary Surface (Surfaces toolbar) or Insert > Surface > Boundary Surface.

Direction 1
Curves Determines the curves used to create the boundary feature in this
direction. Select sketch curves, faces, or edges to connect. Boundary
features are created based on the order of curve selection.
For each curve, select the point from which you want the path of the
boundary feature to travel.
If the boundary feature connectors are incorrect, right-click in the
graphics area and select Flip Connectors to try to fix them.

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Incorrect connectors

Flip Connectors applied

Move Adjusts the order of the curves. Select a Curve and adjust the order.
Up and Move
If the preview shows an undesirable boundary feature, re-select or reorder
Down
the sketches to connect different points on the curves.

Dir1 curves Select one of the following:

influence
Global Extends the curve influence to the entire boundary feature.

To Next Extends the curve influence to the next curve only.

Curve

To Next Extends the curve influence to the next sharp only. A sharp is
Sharp a hard corner of the profile. Any two contiguous sketch entities
that do not have a common tangent or an equal curvature
relation with respect to each other define a sharp. See Guide
Curves in the Loft Property Manager.

To Next Extends the curve influence to the next edge only.

Edge

Linear Extends the influence of the curve uniformly over the entire
boundary feature, similar to a ruled surface. This option helps
to avoid excessive curvature (pocketing) effects by a highly-
indented guide curve on surfaces where curves in a single
direction are coincident to each other.
The curves influence option you select for a direction is applied to all
selections in the direction. You can experiment by changing the curves

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influence options in one or both directions to control your boundary

feature design.
Example: Curves Influence Options
The availability of curves influence options depends on the geometry of
the curves you select for a direction.

Tangent Select one of the following:

Type
Default (Available when you have a minimum of three curves in
the direction.) Approximates a parabola scribed between
the first and last profiles. See Start/End Constraints in
the Loft property Manager. The tangency from this
parabola drives the lofted surface, which results in a more
predictable and natural lofted surface when matching
conditions are not specified.

None No tangency constraint (zero curvature) is applied.

Normal to (Available when the curves are not attaching a boundary

Profile feature to existing geometry.) Applies a tangency
constraint normal to the curve. Set the Draft
angle and Tangent influence (%).

Direction Applies a tangency constraint based on a selected entity

Vector used as a direction vector. Select a Direction Vector ,
then set the Draft angle and Tangent influence (%).

Tangency (Available when attaching a boundary feature to existing

to Face geometry.) Makes the adjacent faces tangent at the selected
curve. Set the Tangent influence (%).

Curvature (Available when attaching a boundary feature to existing

to Face geometry.) Applies a smooth, visually appealing curvature
continuous surface at the selected curve. Set the Tangent
influence (%).

Alignment (Available only for single-directional cases.) Controls alignment of the

iso parameters, which control the flow of the surface. Example of
Boundary Surface Alignment

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Direction (Available with Direction Vector selected for Tangent Type.) Applies a
Vector tangency constraint based on a selected entity used as a direction vector.
The boundary feature is tangent to the selected linear edge or axis, or to
the normal of a selected face or plane. You can also select a pair of
vertices to set the direction vector.

Draft Angle Applies a draft angle to the start or end curve. If necessary, click Reverse
Direction . For single-direction boundary features, draft angle is
available for all Tangent Types. For bi-directional boundary features, if
you connect to an existing entity that has draft, Draft Angle is not
available because the system automatically applies the same draft to the
boundary feature at the intersecting curve.

Tangent (Only available with Global or To Next Sharp selected for curves
influence (%) influence and with curves in both directions. Not available with Tangent
Type set to None or Default.) Extends the curve influence toward the next
curve. Higher values extend the tangency's effective distance. This is
useful for very rounded shapes. Example: Tangent Influence (%) Option

Tangent (Not available with None selected for Tangent Type for any curve).
Length Controls the amount of influence on the boundary feature. The effect of
tangent length is limited up to the next section. If necessary, click Reverse
Tangent Direction .

Apply to all (Available only for single-directional cases.) Displays one handle that
controls all the constraints for the entire profile. Clear this option to
display multiple handles that permit individual segment control. Drag the
handles to modify the tangent length. See Start/End Constraints in
the Loft Property Manager.

Direction 2
Same options as Direction 1 above. The two directions are interchangeable and give the same
results regardless of whether you select the curves as Direction 1 or Direction 2.

Options and Preview

Merge tangent Causes the surfaces in the resulting boundary feature to be tangent if the
faces corresponding segments are tangent. See Options in the Loft Property
Manager.

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Close Surface Creates a closed body along the boundary feature direction. This
connects the last sketch and the first sketch automatically.

Trim by direction Trims surfaces by direction when curves do not form a closed
1 and direction 2 boundary. Example: Trim by Profile

Drag Sketch Enables drag mode. When editing the boundary feature, you can drag
3D sketch segments, points, or planes from the 3D sketch from which
contours have been defined for the boundary feature. The 3D sketch
updates as you drag. You can also edit the 3D sketch to dimension the
contours using dimensioning tools. The boundary feature preview
updates when the drag ends or when you edit the 3D sketch dimensions.
To exit drag mode, click Drag Sketch again or another selection in the
Property Manage.
This ability is only available for a 3D sketch and only if the sketch was
in the Feature Manager design tree directly before the insertion point of
the Boundary Surface feature.

Undo sketch drag Undoes the previous sketch drag and returns the preview to its previous
state. You can undo multiple drags and dimension edits.

Show preview Displays shaded previews of the boundary feature. Clear this option to
view the curves only.

Curvature Display
Mesh preview
Mesh density Adjusts the number of lines of the mesh.

Zebra stripes

Curvature Select at least one of these options:

combs
Direction 1 Toggle the display of curvature combs along Direction 1.

Direction 2 Toggle the display of curvature combs along Direction 2.

Scale Adjusts the size of the curvature combs.

Density Adjusts the number of lines of the curvature combs display.

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