pro-e mechanism tutorial

5/20/2018 Pro-e Mechanism Tutorial

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TRAINING AND PLACEMENT WING-UCEN, http://ucentp.in


Module3-Assembly,Mechanism,Animation

Assembly:

Introduction

This tutorial is designed to introduce you to the basic Assembly , Mechanism and AnimationTechniques used in Pro/E.

HOW TO Start:

Turn on the computer and monitor. After the machine boots, there will be a message telling you

to press CONTROL-ALT-DEL to log on. After you press these keys, the next prompt will be for

a user name and password. Consult the instructor for the current info. Login will bring you to an

introduction screen. Pro/E will use a default directory for storing your part files if you do not

specify another one. During the semester, many files are generated and purged, so save your files

on your own Pen Drive if possible. Next use the "PRO_E " icon to start Pro/ENGINEER. The

Pro-E icon is located under the PTC program group which is under PROGRAM MANAGER.

Getting started:

Open Pro/Engineer

Select filenew

You will be greeted by the following window

Select Assembly and click ok


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We will be discussing only a few constraints

Create the following parts

1) A frame

2) The slider

3) Link1 & link2:

We will be dealing with planar, pin and cylinder constraints while assembling this object

First get into the assembly module

Now import the frame


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To import it click icon and the open dialog box will open, click on the part you want to

import and click the open button

And the frame will get imported


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The frame is our base part all the other parts will be assembled on it

So click the dropdown that shows automatic and select default

Now click

Now import the slider, once the slider has been imported we must make it to move along the

slot in the frame for that we will be using the planar constraints

Click the placement option to open expand it

Now click set1 (user defined)


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Click the set type dropdown and select planar

When you select planar you must choose two planes (planes refers to a surface or a plane) one

plane will be from the object you just imported and the other the plane on which your object

should move. After doing this both the planes will be aligned and your object will be able to

move along that plane only

Now click the bottom surface of the slider

And again click on the bottom surface of the slot

Now as you can see the height of the slider with respect to the frame is set and you cannot

move it up or down

Now to align the sides of the slider with the sides of the slot

For this we will need a new planar connection

To create a new planar connection click new set at the bottom


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And set2 will be created set2 will be automatically be set to planar if you dont want set2 to be

planar you can click on set2 and change set type but in this case we need it to be a planar

connection so neednt change it

Just click on one side of the slider followed by the side of the slot in which you want to align

that side

Note that even now the slider will move perfectly along the slot

But if you want you may align the other side of the slider with the other side of the slot

To check its movements click icon

Now click the slider and you can see that the slider will move with your mouse

Once you are finished moving the slider just click once on the screen

And close the drag window

Then click on the icon to resume assembly

Note that you can use the drag option even after you have finished assembling this component

Click the tick icon

Now import link2

We will now align one end of link2 with the frame the other end will be aligned with link1 later


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Expand placement and set type as pin

For a pin joint we need to align two axis as well as two planes

Select the axis of the hole in link2 followed by the axis in the frame as shown in fig

Now select the bottom surface of link2 followed by the top surface of the frame

Click the tick

Now import link1

Use pin alignment to assemble a hole with the slider in the same way we used to align link2

with the frame

Now we must align link1 and link2

Now click new set

Set type as cylinder (you may use a pin joint for this also)

To define a cylinder you must align two axes

Click the free end axis of link1 with the free end axis of link2

Click the tick

This is how the final assembly will look like


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You can use the drag option to verify the working of your assembly

In case you want to change any dimensions in your assembly say the length of a link. Use the

dropdown found on the right side and set it to features

Now double click on the link for which you want to change the dimension

And all its dimensions will be displayed

Double click on a dimension

Enter a new valueAnd the dimension will increase

Click ctrl+g to regenerate the geometry


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Slot:

In order to make your object follow a custom path we will use the slot constrain

Create the following parts a path and an object that will follow the path

I have created two points at the two ends in the object for constraining purposes

Create new assembly, import path

Then import the object

Set type to slot

Then select the first point, and then select the path ,if the path has many curves use ctrl+click

to select everythingNow add a new set and link the next point in a simillar way

Click the tick

If you check using the drag tool you can see that the object will move along that path


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Mechanism:

This module in Pro-E is used check how the assembled components interact with each other

There are many options in mechanism but only a few of them would be explained. The

components must be properly constrained for mechanism to work

Getting started:

Mechanism can be used only after completing assembly

Once you have assembled a component, go to

Click mechanism and you will enter into the mechanism mode

Now we will explore the options

1) Servo motors:

Servo motors help us to create a rotary or linear motion in the simulation

First create a gear and a shaft and assemble them

Now enter into mechanism mode


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Click on the icon

You must select the axis of rotation, as soon as you have click the servo motor icon the axis of

the shaft will be highlighted

Click on that, and the axis will be selected


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Now click on the profile tab,

And click the drop down to select velocity

Change the magnitude, this will be the angle turned by the gear in 1 second

Click ok

Note that in the above assembly we used a pin joint so the result will be rotary motion, if you

use planar or s lider you can get linear motion also

Now create a new mechanism analysis

This procedure is same for all other options


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Creating A Mechanism Analysis:

Click on the icon

A window will open up

Set the end time value and click run

And your mechanism will run one cycle, now click ok

Once you have created a mechanism analysis, you can preview the results using the playback

option.

This procedure is also same for the other options


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Creating playback:

Click on the icon

And the playback window will open up

Click on

And the animate window will open up

Click the button to start the animation

You can vary the speed using

And save the animation using the capture button

Use the close button to close the animate window and the playbacks window


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2) Gear:

This option is used to create imaginary gears between two entities, or example you have two

shafts connected by gears then while simulating you need not draw the gears itself you can just

set the pitch circle and the motion will be transferred automatically

Assemble two gears

Click the gear icon and the following windows will open up

Select type as spur gear

Select the first shaft axis

Click the gear2 tab and select the second shaft axis

Click on properties


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Give two values for D1 and D2 but the important thing is they should mate

And click ok

Create a servo motor for the driver gear

Then create a mechanism analysis

And view the playback


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Note that the gears will rotate even when they do not mate and will even pass through one

another, so the gear

3) Cams:

Cam mechanism defines how two bodies react when they are in contact with each other, ex:

mating of two gears, cam follower etc.

Assemble the following cam and follower mechanism

Enter the mechanism module

Click the icon

And a window will open up


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Check the auto select box

And click on a surface of the cam and the outer surface will get selected

Click ok in the select window (the second small window not the definition window)


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Click the cam2 tab

And repeat the same steps for the follower

Now click ok on the select window

Click the properties tab, in case your cam will not be in contact at all times check enable lift off

You may set the friction and other values using the properties tab and click ok in the definition

window to close it

To rotate the cam about this axis create a servomotor along the axis of the shaft in which the

cam has been fixed

After this Create a Mechanism Analysis

You can also use the , to pull a gear and verify its working

And playback the result

Note: try 3D contact on your own


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4) Spring:

This mechanism is used to simulate the effect of a spring

Assemble the following part (the same assembly used for cam mechanism, but colored to showthe difference)

Note that there are two points, one at the center of the frame and the other at the bottom of

the follower these points were created while modeling the 3D part, these points are necessary

to define a spring

Click the icon

Click on references and Click on the first point followed by the second point

Now click on options


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Check adjust icon diameter

And set the diameter as needed

Now give a value for k

And click on the tick

Now create a cam, motor definitions

Now create an analysis and playback the result


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5) Gravity:

Gravity can be applied only to dynamic analysis. Click the icon, and the following window will

open up

Give the magnitude relative to in/sec^2, and for the direction along which gravity must act give

value as 1 (-1 refers to opposite direction)

At last click the ok button

Before running analysis you must click the ext loads tab and enable gravity for that analysis

6) Force Motors:

Force motors are used to give loads, click that icon and a window will open up

Select the axis along which the force must act and give in the magnitude of the force and click

ok


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Animation:

This module in Pro-E is used to animate an assembly. The difference between animation and

mechanism is that while using animation the components need not be constrained

Getting started:

Animation can be used only after completing assembly

Once you have assembled a component, go to

Click animation to enter the animation module

Now we will see an example on how to use animation

Assemble the following components


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They are just in contact but not constrained

Now enter into the animation module

To create a new animation click

If you want to create a new one click new

To close the window click close

Now we must define how the bodies should act

Click icon


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Click one part per body option

Note that you can also group different bodies into one; if you group them they will move in the

same way

Click close

Now we must set the key frame sequence, this option will be used to define the position of the

bodies at different points of time, click icon

Click , and another window will open


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Click on snapshots

Now click advanced drag options


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Click the icon to take an initial snapshot

The options will be used to move the components, using the first

option we can move the component along x-axis and similarly the others.To move a component click on the option denoting the direction of the movement and then

click on the object and drag it

For example to move the yellow box along x axis click then click on the object and drag it,

Take a few more snapshots at different positions

Click ok in the select box

Click close in the drag box


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Use the icon to add seconds

And use the dropdown to set the snapshot at that particular time


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To add a new time event First change the time value then the snapshot you want at that

particular instant of time and click the symbol

Click ok to close it

Click the icon to run the animation once

Now click the icon to view a playback

Note that the entire animation will be run in a single view that is in front view or side view

To define different views at particular time

Click the view@time icon and a window will open up

The name corresponds to the view

Value refers to the time it must be in that view after a particular snapshot

From the above fig the image will be in back view at 0 seconds after start

Note that after setting this value you must, click the icon to run the animation once

And then only you can view a playback

pro-e mechanism tutorial

Documents

placement wingucen

placement option

intro tutorial

theproe icon

new set

new planar connectionto

planar constraintsclick

open buttonand