CADFamily.com: Worm Wheel in UG

figure1(final model)

Step1:Establish a new model,named worm_wheel.prt

Step2:Create sketch feature 1 as shown in figure 2

figure 2 figure 3

(1)Click ,sketch.(or click the button of ),Popping the dialog box of "sketch"

(2)Choose the XC-YC as sketch plane,Click

(3)draw the figure 3 as figure 3.

(4)Click

Step3:Create evolvent feature 1 as showed in figure 4

figure 4

(1)The equation of the evolvent is:

t=0 , r=72.66/2 , theta=t*45

xt=r*cos(theta)+r*sin(theta)*theta*pi()/180

yt=r*sin(theta)-r*cos(theta)*theta*pi()/180

zt=0

(2)Click ,expression,Popping the dialog box of "expressions"

(3)Input the equation to the dialog box of "expressions"as shown in figure 5.Click

figure 5

(4)Click ,curve,basic curve.(or click the button of ),Popping the dialog box of "law curves"

(5)Choose ,Click,input t ,Click,input xt ,Click choose ,Click,input t ,Click,input yt ,Click , choose ,Click,input t ,Click,input zt ,Clickand then Click .

Step4:Create lines feature 1 as showed in figure 6

figure 6 figure 7 figure 8

(1)Click ,curve,line,Popping the dialog box of "line",in the field of start option choose point,and select the point in figure 7 as start point ,and in the field of end option choose point,and select the original point as end point . Click

(2)Click ,move object,Popping the dialog box of "move object" select the line in figure 8,in the field the motion choose angle,and in the field of specify vector choose ,in the field of specify axis point choose original point,in the field of angle input 3,change and input the value like the following figure 9.Click

figure 9

Step5:Create mirror feature 1 as showed in figure 10

figure 10

(1)Click ,move object,Popping the dialog box of "move object"

(2)Select the evolvent feature 1,in the field the motion choose rotate by three points,and in the field of specify vector choose the line in figure 6,in the field of specify start point choose the endpoint of the evolvent feature 1,in the field of specify end point choose the point in the right of the line in figure.

(3)Click

Step6:Create datum plane 1 as shown in figure 11

(1)Click ,Popping the dialog box of "datum plane"

figure 11

(2)In the field "type",choose "at angle" ,in the field of select planar object choose XC-YC ,in the field of select linear object choose the line in figure 6,in the field of angle input 90,

(3)Click

Step7:Create sketch feature 2 as shown in figure 12

figure 12 figure 13

(1)Click ,sketch.(or click the button of ),Popping the dialog box of "sketch"

(2)Choose the datum plane 1 as sketch plane,Click

(3)draw the figure 13 as follow.

(4)Click

Step8:Create revolve feature 1 as shown in figure 14

(1)Click ,design feature,revolve.(or click the button of ),Popping the dialog box of "revolve"

(2)Choose sketch feature 2 ,in the field of specify vector choose ,in the field of the specify point choose original point.Change and input the value like the following figure 15.Click