Assignment 26

Fall 2020

MET 223

Introduction to Mechanical Engineering Design, Innovation and Entrepreneurship

TAP 3

(SOLIDWORKS – Assembly)

Student Name Student ID

Feedback/Comments:

Grade: /100

Page 2 of 12

1. Introduction

In this experiment, students will use SolidWORKS to create an assembly. They will use existing parts and apply mates to create final 3D model (assembly). At the end, students will apply different color for each part.

2. Objectives

• To get familiar with SolidWORKS assembly design • To the instructions that will be included to complete the assignment.

3. Equipment/Components/Software:

Software SolidWORKS 2016 Equipment PC

4. Theory

-INSERT COMPONENT (Command)

(http://help.solidworks.com/2016/english/solidworks/sldworks/t_inserting_components _one_at_a_time.htm)

Inserting One Component at a Time You can add components to an assembly one at a time from the PropertyManager.

To insert components:

1. Do one of the following to open the PropertyManager: o Create a assembly document by clicking New (Standard toolbar) or File >

New. o In an existing assembly, click Insert Components (Assembly toolbar) or Insert

> Component > Existing Part/Assembly.

Previously saved documents that are currently open appear under Part/Assembly to Insert.

Page 3 of 12

Click to pin the PropertyManager if you want to insert multiple components without having to re-open the PropertyManager.

2. Select a part or assembly from the list, or click Browse to open an existing document. 3. Do one of the following:

o Click in the graphics area to place the component. o Rotate the component to the desired orientation and click in the graphics area to

place the component. o Click to place the component origin coincident with the assembly origin.

If the PropertyManager is not pinned, it closes.

If the PropertyManager is pinned, click again in the graphics area to add another instance of the selected component, or repeat steps 2 and 3 to add a different component.

-MATE (Command)

(http://help.solidworks.com/2016/english/solidworks/sldworks/hidd_new_add_mate.ht m)

Mate PropertyManager - Mates Tab You add or edit mates on the Mates tab of the Mate PropertyManager.

To open the Mate PropertyManager, do one of the following in an assembly:

• Add a mate by clicking Mate (Assembly toolbar), or Insert > Mate. • Edit a mate by expanding the Mates folder in the FeatureManager design tree. Right-

click one or more mates, and select Edit Feature.

Mate Selections

For Advanced Mates and Mechanical Mates, other fields appear under Mate Selections, depending on the type of mate. See separate help topics for the type of mate you are creating.

Entities to Mate

Select the faces, edges, planes, and so on that you want to mate together.

Multiple mate mode

Mates multiple components to a common reference in a single operation. The following fields and options appear:

Common reference

Select the entity to which you want to mate several other components.

Page 4 of 12

Component references

Select entities on two or more other components to mate to the common reference. A mate is added for each component.

Create multi- mate folder

Groups the resulting mates in a Multi-Mates folder, where you can change the common reference, mate type, or distance for all mates in the folder in a single operation. Otherwise, a series of individual mates is added to the model.

Link dimensions

(Available only for Distance and Angle mates in a multi- mate folder). Links the dimensions. The variable name in the Shared Values dialog box is the same as the multi-mate folder name.

You can remove a mate from the multi-mate folder by right-clicking it and selecting Remove from Multi-Mate. You can remove all mates from a multi- mate folder by right-clicking the folder and selecting Dissolve Multi-Mate. The mates appear in the Mates folder, and no longer have a multi-mate association with each other.

Standard Mates

All the mate types are always shown in the PropertyManager, but only the mates that are applicable to the current selections are available.

Coincident Positions selected faces, edges, and planes (in combination with each other or combined with a single vertex) so they share the same infinite plane. Positions two vertices so they touch. Align axes

(Available when applying a coincident mate between origins and coordinate systems.) Fully constrains the component.

Parallel Places the selected items so they remain a constant distance apart from each other.

Perpendicular Places the selected items at a 90° angle to each other.

Tangent Places the selected items tangent to each other (at least one selection must be a cylindrical, conical, or spherical face).

Concentric Places the selections so that they share the same center line. To prevent rotation in concentric mates, after selecting the mating geometry, select Lock rotation.

Lock Maintains the position and orientation between two components.

Distance Places the selected items with the specified distance between them.

Angle Places the selected items at the specified angle to each other.

Mate alignment

Toggle the mate alignment as necessary.

Page 5 of 12

Aligned Vectors normal to the selected faces point in the same direction.

Anti- Aligned

Vectors normal to the selected faces point in opposite directions.

You can control the value of distance and angle mates in a design table. The column header in the design table uses the syntax dimension@mate_name (for example, D1@Distance1.) In the table body cells, type the value for the dimension. See Dimensions in Configurations. Advanced Mates

Profile Center Center-aligns rectangular and circular profiles to each other and fully defines the components.

Symmetric Forces two similar entities to be symmetric about a plane or planar face.

Width Constrains a tab between two planar faces.

Path Constrains a selected point on a component to a path.

Linear/Linear Coupler

Establishes a relationship between the translation of one component and the translation of another component.

Limit Allows components to move within a range of values for distance and angle mates.

Mate alignment Toggle the mate alignment as necessary.

Aligned Vectors normal to the selected faces point in the same direction.

Anti- Aligned

Vectors normal to the selected faces point in opposite directions.

Mechanical Mates

Cam Forces a cylinder, plane, or point to be coincident or tangent to a series of tangent extruded faces.

Slot Constrains the movement of a bolt or a slot to within a slot hole.

Gear Forces two components to rotate relative to one another about selected axes.

Hinge Limits the movement between two components to one rotational degree of freedom.

Rack and Pinion

Linear translation of one part (the rack) causes circular rotation in another part (the pinion), and vice versa.

Screw Constrains two components to be concentric, and also adds a pitch relationship between the rotation of one component and the translation of the other.

Universal Joint

The rotation of one component (the output shaft) about its axis is driven by the rotation of another component (the input shaft) about its axis.

Page 6 of 12

Mate alignment

Aligned Vectors normal to the selected faces point in the same direction.

Anti- Aligned

Vectors normal to the selected faces point in opposite directions.

Mates The Mates box contains all the mates added while the PropertyManager is open or all of the mates that you are editing. When there are multiple mates in the Mates box, you can select one to edit that mate.

To edit more than one mate at a time, select multiple mates in the FeatureManager design tree, then right-click and select Edit Feature. All the mates appear in the Mates box. Options Add to new folder

When selected, new mates appear in a folder in the Mates folder in the FeatureManager design tree. When cleared, new mates appear in the Mates folder.

Show pop-up dialog

When selected, the Mate pop-up toolbar appears when you add standard mates. When cleared, you add standard mates in the PropertyManager.

Show preview When selected, a preview of a mate occurs when you make enough selections for a valid mate.

Use for positioning only

When selected, components move to the position defined by the mate, but a mate is not added to the FeatureManager design tree. A mate appears in the Mates box so you can edit and position the components, but nothing appears in the FeatureManager design tree when you close the Mate PropertyManager. The Use for positioning only check box is an alternative to adding many mates, then later deleting those mates in the FeatureManager design tree.

Make first selection transparent

Makes the first component you select transparent, to facilitate selecting from the second component. This option is useful if the second component is behind the first.

Mate Errors FeatureManager Design Tree Mate Symbols and Error Messages Icon and Error Message Explanation What To Do

(None) Mate is OK. No action needed.

Mate type is grayed out. For example:

Mate is OK. One of the parts used in the mate is suppressed so the mate is temporarily inactive. The

No action needed.

Page 7 of 12

Icon and Error Message Explanation What To Do

(No error message) mate will re-activate when you unsuppress the part.

"This mate is over defining the assembly. Consider deleting some of the over defining mates"

or

"This mate cannot be solved. Consider:

• Deleting this mate.

• Moving the assembly closer to the desired solution with dragging.

• Adding more mates to further define the assembly.

• Changing the mating scheme."

Potential causes:

• Another mate in the assembly is attempting to violate this mate (the offending mate displays the symbol).

• The mate and an already- existing distance or angle mate are redundant to each other.

• The mate is attempting to locate a component that is fixed.

Look for other mates with the symbol. If found, investigate

those first because they often cause this error.

See Techniques for Fixing Mate Problems.

Various messages. For example:

"One of the entities of this mate is suppressed, invalid, or no longer present."

The mate is dangling because one of the entities (face, edge, plane, etc.) is no longer in the model.

Example: Mates to Dangling Geometry

This is generally caused by editing, suppressing, or deleting a part feature, or replacing a part with another part that is missing the mated feature.

If a similar entity is available, edit the mate and select the new entity, or use Replace Mated Entities. See Mated Entities PropertyManager.

Otherwise, delete the mate and create a different mate to perform the same function.

Page 8 of 12

Icon and Error Message Explanation What To Do

Suppressing an entire part does not cause this error.

"Cylinders are not concentric. Distance between centers is n mm."

This mate is trying to move a component in a way it cannot move because the component is either fixed or constrained by other mates.

• Example: Conflicting Mates

• Example: Design Errors and Mating

• Example: Concentric Mate Error

See Techniques for Fixing Mate Problems.

-MOTION STUDY (Command)

(http://help.solidworks.com/2016/english/solidworks/sldworks/t_starting_new_motion_ study.htm)

Starting a New Motion Study You can create the first motion study for an assembly by clicking the Motion Study tab to the right of the Model tab toward the lower portion of the graphics area.

To start a new motion study for an assembly:

Open the assembly and do one of the following:

Page 9 of 12

• Right-click the Motion Study tab and click Create New Motion Study. • Click New Motion Study (Assembly toolbar).

The new motion study appears with the MotionManager tree defined by components of the FeatureManager design tree.

The available motion studies types are Animation, Basic Motion, and Motion Analysis. You can select the type of motion study from the Type of Study list at the top of the MotionManager, located below the FeatureManager design tree.

Motion Study Properties PropertyManager

To open the Motion Study Properties PropertyManager:

With a motion study open, click Motion Study Properties (MotionManager toolbar).

Animation Frames per second

This value, multiplied by the length of the animation, specifies the total number of frames that are captured. This value does not affect the playback speed.

Basic Motion Frames per second

This value, multiplied by the length of the animation, specifies the total number of frames that are captured. This value does not affect the playback speed.

Geometry Accuracy

Basic Motion makes meshes out of curved geometry. The higher the accuracy, the closer to actual geometry the mesh becomes. This makes collision simulation more accurate, but requires more time to compute.

3D Contact Resolution

Controls the allowed amount of penetration within geometric meshes. Lower settings allow more penetration within the mesh. Using solid body Contact produces smoother motion, especially in tight-fit situations. For example, you can include solid body Contact information before calculating the smooth motion of a ball rolling in a channel that has very little clearance.

Motion Analysis Frames per second

This value, multiplied by the length of the animation, specifies the total number of frames that are captured. This value does not affect the playback speed.

Animate during simulation

Clearing this option speeds up the calculation time and prevents the graphics from displaying the motion during calculation of the simulation.

Replace redundant

This option converts redundant mates in the assembly into bushings. In most cases, this increases the required calculation time.

Page 10 of 12

mates with bushings

Bushing Parameters

Changes the stiffness and damping for all bushings that replace redundant mates.

Display results graphics as wireframe

3D Contact Resolution

SOLIDWORKS Motion typically represents shapes as many-sided polygons. The higher the number of sides, the more closely SOLIDWORKS Motion approximates the actual geometry. However, this increases the required calculation time when you introduce solid body Contact.

Use Precise Contact

Select to calculate contact using the equations that represent the solid bodies. Clear to calculate contact approximately using the geometry of many-sided polygons. When you select Use Precise Contact, the computed contact is analytically correct, but the computation can take longer than an approximate solution.

Accuracy Higher values increase the required calculation time.

Cycle settings Specifies the cycle rate or period. Cycle settings defines the cycle angle used in custom Motor or Force profiles. Select one of the following: Cycle rate Specifies the cycle rate in cycles per second. Cycle time Specifies the cycle period in seconds.

Plot Defaults Set definitions for the plot display.

Advanced Options

Additional options for advanced users.

General Options Use these settings as defaults for new motion studies

When you select this option before closing the Motion Study Properties PropertyManager, the settings are applied as defaults for each motion study you create.

Show all Motion Analysis solver messages

Select this option to show messages during Motion Analysis study computations.

5. Video material for the lab, and free software link

- Watch the video link to see how to make an assembly:

https://www.youtube.com/watch?v=vE1ewj6xxt8

- Use the following link to download free trial of SOLIDWORKS software: https://my.solidworks.com/try-solidworks

Page 11 of 12

6. TAP 3 – Part 1

Answer experimental questions using video material, or preforming the same tasks in SOLIDWORKS with parts provided. (each 20 pts) Note: Answer the questions with detailed explanation (several sentences)

1. Explain in several steps (using Figure 3.1) how you put all these parts together (how you make an assembly).

Figure 3.1

2. Explain in several steps (using Figure 3.2) how to make Motion study that lasts 5 seconds.

Figure 3.2

Page 12 of 12

3. Explain in several steps (using Figure 3.3) how to change the parts’ colors.

Figure 3.3

7. TAP 3 – Part 2

Answer the questions below with detailed explanation. (each 10 pts)

Question 1: What is the name of the tab you use to create animation of the assembly? Question 2: Which command you use to add new parts to the assembly? Question 3: What should you select to create new Assembly? Question 4: In which tab is Mate command?

Bonus Question: (5 pts) Why do we specify 2 points during motion study? What are these two points?