DMU KINEMATICS IN CATIA PDF

CADD Centre is also the preferred training partner of more than corporate houses in India and abroad. An Arm Rotating about a Revolute Joint. Newer Post Older Post Home. The processes of generating movie files and plots of the kinematic results are covered. Zamani SDC Publications23 dmk.

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CATProduct document. When you create joints, you can define the mechanism within the same dialog box. Click the arrow within the icon and undock the Kinematic Joints toolbar.

The DMU Kinematics toolbar is displayed: 3. Select the joint type of your choice. For instance click the rigid joint icon. The Joint Creation: Rigid dialog box is displayed. The term Rigid corresponds to "Fully restricted" in the standard Kinematic terminology. Select the parts either in the geometry area or in the specification tree.

Click Ok to confirm your operation. The Rigid Joint is identified in the specification tree. Defining a Fixed Part This task will show you how to define a Fixed part.

The New Fixed Part dialog box is displayed. Select the Fixed Part either in the geometry area or in the specification tree. The fixed Part is automatically defined. The Fixed part is identified in the specification tree. At any time you can use the undo command to modify your selection.

Defining Commands You can define a command either during joint creation or after joint creation. This task shows how to define a command on a cylindrical joint during its creation.

You created a mechanism. Double-click Joint 4 in the specification tree The joint Edition dialog box is displayed 2. Check the Driven angle option, for instance. The command is identified in the specification tree. You can also create the command while creating a joint. Editing joints means you can modify: its name This task shows you how to do so.

Double-click the joint to be edited in the specification tree. For instance Joint 1. The Joint Edition dialog box displays: 2. In the name field enter a meaningful name: Revolute for instance. Check the Driven angle command. Click OK to confirm your operation.

The Joint is updated and identified in the specification under its new name. Note that you can edit the mechanism name. For this all you need to do is double-click the mechanism in the specification tree and enter a new name in the dialog box displayed and click OK. Converting Constraints into Joints This task show you how to convert Assembly constraints into V5 joints. The Assembly Constraints Conversion dialog box appears: 3. Click on the New mechanism button. Click on the Auto Create button to launch the operation.

You can see that there are 5 unresolved pairs of products. The constraints are converted into V5 joints. The 5 joints are identified in the specification tree and highlighted in the geometry area You need to create the command manually or click the button and refer to Converting Constraints into Joints Advanced Mode 5. Double-click Joint. The Edit Joint Edition dialog box is displayed 7. Check the Driven angle option and then OK to create the command.

The command is created and identified in the specification tree An information message is displayed, your mechanism can now be simulated. Click OK. Using the Update Command This task show you how to use the update command a very powerful tool which lets you keep the Assembly workbench and the Kinematics Simulator workbench synchronized. It means the modifications done are taken into account and the joints or constraints are respectively updated. What is taken into account? Move the Rod.

Reposition the 3D compass as it was. Click the Update positions icon. The Update Mechanism dialog box is displayed: The Take current positions for rigid joints option lets you take into account the new position. The mechanism is updated and the part is back to its initial position. Now, move Rod. Check the Take current positions for rigid joints option. This is what you obtain: Now simulate the mechanism. Please refer to Simulating With Commands.

The current position has been kept for Joint. If you need information about this particular constraint: double-click Coincidence. Right-click Coincidence. Select Delete form the contextual menu displayed. The Update Mechanism dialog box appears. The joints within the mechanism are updated Joint. Create Prismatic Joints: click the Prismatic Joint icon from the Kinematic Joints toolbarthen select the required parameters in the dialog box displayed, when done click Ok.

Create Cylindrical Joints: click the Cylindrical Joint icon from the Kinematic Joints toolbar, then select the required parameters in the dialog box displayed, when done click Ok. Create Spherical Joints: click the Spherical Joint icon from the Kinematic Joints toolbar, then select the required parameters in the dialog box displayed, when done click Ok. Create Planar Joints: click the Planar Joint icon from the Kinematic Joints toolbar, then select the required parameters in the dialog box displayed, when done click Ok.

Create Rigid Joints: click the Rigid Joint icon from the Kinematic Joints toolbar, then select the required parameters in the dialog box displayed, when done click Ok. Creating Revolute Joints This task shows how to create revolute joints in a V5 mechanism. Make sure you are in Design mode.

If the menu item cannot be selected, right-click product1 in the specification tree. The Joint Creation: Revolute dialog box is displayed: 3. Click New Mechanism. The Mechanism is identified in the specification tree. The Null Offset option is set by default radio button.

Now you need to select two lines and two planes 5. Select Line 1 in the geometry area. In our example select the hinge axis as shown below: 6. Select Line 2 in the geometry area. Select the wheel axis: The dialog box current selection field is automatically updated. Select the planes as shown below.

Plane 1: select the left inner hinge plane Plane 2: select the left wheel surface 8. Assign the driven angle command if needed. Click Ok to end the Revolute Joint creation. The specification tree is updated CATProduct to check your result. The Joint Creation: Prismatic dialog box appears.

Now you need to select two lines and two planes 4. In our example select an edge Cube 1 5. Select a second edge Cube 2 The dialog box current selection field is automatically updated. Click Ok to end the prismatic joint creation. The prismatic joint is created and identified in the specification tree 8. Creating Cylindrical Joints This task shows how to create cylindrical joints in V5 mechanism. The Joint Creation: Cylindrical dialog box appears. Now you need to select two lines 4.

Click Ok to end the cylindrical joint creation. The joint is created and identified in the specification tree 7. Creating Spherical Joints This task shows how to create spherical joints in a V5 mechanism.

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