Contact

<< Click to Display Table of Contents >>

Navigation:  Mechanical Modeler > Constraints >

Contact

The DVTI_ContactConstraint Contact Constraint locates the features so that their surfaces touch. This routine can also be used to translate a part along a curve; locate a sphere inside a cone (similar to the spherical move), locate a torus inside a cone (similar to the revolute move).

 

See Also: Common Parameters

 

 

MECHhelp_contact2

 

Feature Specification: Object and target features can be any of the following combinations.

 

Object Features

Target Features

One Feature to define an Axis

One Feature to define an Axis

A pair of Points (2) to define an Axis

A pair of Points (2) to define an Axis

n amount of Features to define a plane

N'th amount of Features to define a plane

n amount of Points to define a plane

N'th amount of Points to define a plane

One to Two Points

Edge or Point Group defined as an edge

n amount of Slots or Tabs

N'th amount Slots or Tabs

More than 2 points defined as Curve

More than 2 points defined as Curve

3 or more mesh nodes in edge not in straight line is defined as Curve

3 or more mesh nodes in edge not in straight line is defined as Curve

 

Procedure - Planar Features

To create these moves, select object and target features that represent the desired combination. The contact constraint can be created for a variety of model applications, but the basic procedure is as follows.

 

1. Feature Tab:

Click in the Object Features box and select one or two features from the part(s) to be moved.

Click in the Target Features box and select one or two corresponding feature(s) of the target part(s).

 

An example is shown below, where the two planar surfaces will be moved together so that they touch.

 

MECHhelp_contact

 

2. Move Parts Tab:

Parts should automatically be added to Move Parts based on the Tree structure of the model.  Verify that these are the desired parts.  Only two parts can be added to this list.  The first part corresponds to the Object features and the second part corresponds to the Target features.


Contact Move on Curves

 

Point on Line (2 Points determines a line)

Target Features: two points or an edge that contains two points. This retains 4DOF - 3 Rotations and 1Translation

clip0178

 

 

Point on Curve (Spline or at least 3 points)

Target Features: 3 or more points. This retains 3DOF- 3 Rotations

 

clip0179             clip0180