【分享】在装配中使用Mechanism Design

以下内容需要积分高于 0 才可浏览

Introduction  
Assemblies created using Mechanism Design may then be transfered to Pro/MECHANICA Motion for Motion Analyses.  Within Mechanism Design, Drivers may be added and the mechanism motion may be simulated kinematically.  Mechanism Design results may be used to check for possible interferences which may arise between moving parts.   
For the purposes of this document a piston and crank assembly will be used.  This example mechanism contains five parts: Engine Block Bottom, Crank Shaft, Piston Connecting Rod, Connecting Rod Clamp, and the Piston Head.

sdfda 1# boby asdfasdfa

boby：请给我一份吧！ siae@263.net

以下内容需要积分高于 0 才可浏览

If anyone need the exercise parts, please let me know.
reply your email here(Before 23 Feb,2002)
The file is about 1.5M, i can't attach it herexx(

唉，虽然还没有看明白，但知道是个好东东，现收起来！！！
谢谢boby水手！！！

以下内容需要积分高于 0 才可浏览

完了

以下内容需要积分高于 0 才可浏览

9
Now the model is fully defined and may be used in Mechanism Design for Kinematic analyses or transferred to Pro/MECHANICA Motion for Dynamic analyses.  However, the assembly may be tested in Mechanism Design much the same way in Pro/MECHANICA an assembly analysis is used to check and see if the model can be put together as defined.  To do this, select Mechanism, Connect,Run.  Mechanism Design will report the results of the run once it is done and will ask you if you would like to accept the assembled configuration.  Select Yes if the assembled configuration looks correct.  Finally, the model will look like Figure 10.

以下内容需要积分高于 0 才可浏览

8
Although the model is fully assembled now, it is still incomplete.  The Piston Head has a pin connection to the Connecting Rod.  However, as it is assembled the Piston Head is free to flop around rotating about its pin connection with the Connecting Rod. The model needs to be finished by adding another connection such that the Piston Head would move up and down as if it were inside a cylinder.  To do this, a cylinder joint needs to be defined between the Piston Head and Ground which is the Engine Block Bottom in this model.  
If you still have the "Component Placement" dialogue box open, you may simply select Add and change the connection type to "cylinder".   Otherwise select Component, Redefine, and pick the Piston Head. Select the Add button and change the type of the new connection to "cylinder".  As shown in Table 1, a cylinder connection only needs an axis alignment constraint. Select the appropriate axes on the Engine Block Bottom and the Piston Head. Select Ok to complete the definition of the cylinder connection.  
  
A "slider" connection would also work in this model.  Figure 9 and 10 show this model with a "slider" connection.  If you use a "cylinder" connection your model will have a "cylinder" connection icon instead.

以下内容需要积分高于 0 才可浏览

7
The final part to be assembled is the Piston Head.  The Piston Head will be assembled on to the Connecting Rod using a pin connection.  The orientation of the Piston Head may be adjusted if necessary.  See Figure 8.

以下内容需要积分高于 0 才可浏览

To assemble the Connecting Rod Clamp using Fixed constraints, select Component, Assemble, and select the Connecting Rod Clamp Part. Instead of selecting "Connections" to expand the dialogue box, use traditional Pro/ENGINEER Assembly constraints. In this case a mate constraint and a pair of align constraints may be used to properly assemble the Connecting Rod Clamp to the Connecting Rod.  See Figure 7.