ME-430 Introduction to Computer Aided Design CREATING ASSEMBLY OF CHAIN LINK Pro/ENGINEER Wildfire 2.0 Dr Herli Surjanhata CREATE THE PARTS FOR ASSEMBLY Five parts are needed in this tutorial: • • • • • roller_link_plate.prt bushing.prt roller.prt pin_link_plate.prt pin.prt Create a chain plate part called roller_link_plate.prt This is done by clicking a Create New Object icon on the tool bar menu Create New Object icon Type in roller_link_plate here! Then click OK button The dimensions of roller_link_plate.prt are shown below All units in inches Extrusion depth is 0.04 in From Tools pull down menu select Parameters Enter Parameter name: material Enter Parameter type: string Enter value for material: steel Create the second part called pin_link_plate, File -> Save a Copy Then Open pin_link_plate, modify and regenerate the dimensions as shown below, Modify this dimension to be 0.16 in Modify this dimension to be 0.38 in Save the part pin_link_plate Repeat the same procedure as shown above to create parameter for material = steel Create the third part called bushing, the dimension is shown below Create Datum Axis for bushing if necessary, and setup the material = steel Create the part called roller as shown below Setup the following parameter: Material = steel 5 Finally, create the last part called pin Setup the following parameter: Material = steel We will first create two sub-assemblies called roller_link.asm and pin_link.asm, then assemble them together to form roller_chain.asm Pro/ENGINEER provides a variety of constraint types for placement of components Note: Automatic is the default constraint type of the Component Placement dialog box With the automatic option, references are selected for both the component and the assembly Pro/ENGINEER will determine the constraint to apply, but will provide you the option of selecting an alternative constraint CREATE A SUB-ASSEMBLY ROLLER_LINK Create an assembly called roller_link.asm This is done by clicking a Create New Object icon on the tool bar menu Create New Object icon Select Assembly here! Type in roller_link here! Then click OK button Bring in the roller_link_plate.prt and automatic constrain it to the assembly default datum using Align Click Select roller_link_plate.prt Click Open button Component Placement window appears, Keep the Constraints Type default (Automatic) Pick RIGHT datum plane of roller_link_plate, then pick ASM_RIGHT datum plane of roller_link (assembly default datum plane) The two datum planes are automatically aligned Repeat the same procedure for FRONT datum plane of roller_link_plate and ASM_FRONT datum plane of roller_link Repeat again the same procedure for TOP datum plane of roller_link_plate and ASM_TOP datum plane of roller_link The datum planes of roller_link_plate and roller_link assembly are automatically aligned as shown in the figure on the left Placement Status is now Fully Constrained Click OK button 10 From Edit pull down menu, select Repeat The Repeat Component window appears Hightlight only the Align constraint This chooses the constraint to be repeated Then select Add button Select aligning axis from assembly for new component occurance – pick the right axis A_2 of roller_link_plate Click Confirm button 14 Assemble roller to bushing using Align, and Mate Offset Note that the top surface of roller_link_plate is offset at 0.010 in from the bottom surface of roller Click the axis A_1 of the roller, then click the axis A_1 of the bushing Click the bottom surface of the roller, then click the top surface of the roller_link_plate Type offset distance 0.01 [Enter] Offset = 0.01 15 Repeat the placement of roller to the bushing located at the right side of the assembly The last operation of this sub-assembly will be to assemble another roller_link_plate Use Align and Align Offset 0.005 in as Placement Constraints Note that bushing is protruded out 0.005 from the top surface of roller_link_plate located the top of sub-assembly Offset = 0.005 16 Pictorial view of sub-assembly roller_link Un-Exploded view Exploded view To explode the view, click or View -> View Manager The View Manager dialog box opens Click Explode tab Click shown Click if Properties button is to explode the assembly 17 Click to in-explode an assembly To modify the exploded view for better presentation, Click Explode Position window appears, keep the default and pick one of the opening edges of the bushing Pick this vertical edge 18 Pick and move the component you want to translate Make sure you not hold the left mouse button when moving the component The resulted new arrangement is shown below 19 CREATE A SUB-ASSEMBLY PIN_LINK.ASM Using the same procedure shown above, create pin_link.asm Create a new assembly called pin_link Start with Assembly Default Datum Planes, assemble pin_link_plate to the assembly default datum planes The resulted operation is shown below 20 Assemble pin.prt to pin_link_plate by, • • Align the axis (e.g A_1) of the pin with the axis (e.g A_1) of the left hole of the pin_link_plate Mate the bottom surface of pin head to the top surface of the pin_link_plate The resulted operation is shown below Pick the pin.prt, and use a special function Edit -> Repeat for repeating the placement of pin to the right hole 21 , and modify the expoded view for better presentation Save the subSelect assembly 22 CREATE A TOTAL ASSEMBY ROLLE_CHAIN The total assembly roller_chain will be consisted of • • • Sub-assembly roller_link.asm Sub-assembly pin_link.asm Part pin_link_prt.prt Create a new assembly called roller_chain Assemble roller_link.asm to the roller_chain assembly default datum planes 23 The resulted operation is shown below Use Align and Mate to place pin_link.asm to the total assembly Make sure the bottom surface of the pin_link_plate mates the top surface of the bushing 24 Use Align and Mate to place roller_link.asm to the total assembly Use Edit -> Repeat to place pin_link.asm to the right side of the chain pin_link.asm is repeated here 25 Place pin_link_plate.prt to the total assembly Use Align & Mate to assemble the plate 26 Use Edit -> Repeat to place pin_link_plate to the right side of the chain Use Repeat to assemble this plate The shaded display of roller_chain.asm is shown below Un-exploded view of roller_chain assembly 27 Exploded view of roller_chain assembly 28 ... appears Click the axis A_1 of the bushing, then click the axis A_1 (on the left hole) of the roller_link_plate Click the bottom surface of the bushing, then click the bottom surface of the roller_link_plate... 0.010 in from the bottom surface of roller Click the axis A_1 of the roller, then click the axis A_1 of the bushing Click the bottom surface of the roller, then click the top surface of the roller_link_plate... 0.38 in Save the part pin_link_plate Repeat the same procedure as shown above to create parameter for material = steel Create the third part called bushing, the dimension is shown below Create Datum