Chapter 7 Holes and Threads

SolidWorks 2010

Chapter 7 – Holes and Threads

In this lesson we will review the procedures for adding various types of holes and adding threads to holes and shafts. We will also look at some of the steps required to complete the models of the Toolmakers Clamp Rear Screw and Plain Jaw.

Please note. Read the text of the notes carefully, the pictures are only there as a visual check.

First, we will review the steps required to model the Rear Screw and add an external thread to the shaft. Begin by starting a new part.

As described in chapter 5, select the Revolved Boss/Base command and select the Right Plane.

Now draw half of the profile of the Toolmakers Clamp Rear Screw as detailed on the drawing at the end of this chapter, so that it looks like the picture below (note the position of the point of origin):

When drawing, please note the following points:

· Do not attempt to draw the chamfers at either end of the Ø16.5 section of this part.

· Do not draw the Ø6mm hole at this stage either.

· Don’t forget to divide all of the diameter measurements on the drawing by 2 to make them radius dimensions.

· Fully dimension this part to ensure that it is fully constrained and that all the lines have turned black before leaving the sketch.

· Ensure that you have steps along the top edge of the part as shown below.

When the sketch is complete, dimensioned and fully contrained, click the End Sketch icon complete the steps of the Revolved Boss/Base command. The adjuster screw should look like the picture on the right:

Next add the Ø6mm cross-drilled hole in the handle end. Follow the steps shown on page 55 of chapter 5.

Add the chamfers to the ends of the handle, once again following the steps shown on page 59 of chapter 5.

The final operation is add a thread to the Ø10mm area of the shaft.

First you will need to switch on the option to allow cosmetic threads to be shown.

To do this, select the Options Menu from the top of the screen, as shown below

Alternately, the Options menu can be found at the bottom of the Tools pull down menu.

Next select the Document Properties menu, as shown below and select the Shaded cosmetic threads options, circled in red as shown below.

Note. As this setting applied to the document only, it will need to be set each time you start a new part.

To add the thread to the part select the Insert menu from the tool bar at the top of the screen. From this menu select the Annotations option and from that select the Cosmetic Thread option, as shown on the right (circled in red).

The Cosmetic Thread menu will now open, as shown below. With the Circular Edge box highlighted in blue, you will need to select the edge of the part of the shaft to which we need to add the thread, as shown on the below in orange.

The other data required for the Cosmetic Thread menu are as follows:

· The End Condition menu should be selected as Up to Next, as circled in red below

· The Minor Diameter should be set at 10.00mm, as circled in blue below

· The Thread Callout should be stated as M12 x 1,75, as circled in green below.

Once this is complete, click the green tick to accept the settings.

The completed Adjuster Screw should now look like the view shown above.

Now, we will review the steps required to model the Plain Jaw and add the counter-bored and threaded holes.

Begin by starting a new part, but as this will be the first part required for the assembly, it is important that it is in the correct orientation when looking at an isometric view. Therefore, select the right plane as shown below:

After drawing the outer shape of the Plain Jaw, extrude it mid plane, as shown below circled in red, and extrude it by 16mm, as shown below circled in blue.

As before, you will need to switch on the Shaded cosmetic threads option from the Document Properties menu.

To put the holes into this part, we will be using the Hole Wizard, as shown below.

The Hole Specification menu will now open and appear on the left side of the screen, as shown below.

1st we will create the counter-bored hole near the centre of the jaw. To do this select the Legacy hole option, as shown below circled in red. Select the C-Bored Drilled option, as shown below circled in blue.

The settings for the hole size will now need to be altered to the values indicated below.

The hole specification is now complete, so it’s time to place the hole in the correct position.

To do this click the Positions tab at the top of the Hole Position menu, as shown below.

As you can see from the picture above, the Hole Position menu is now asking you to select the face where you want to place the hole.
Select the top face of the Plain Jaw in approximately the correct position to place the counterbored hole, as shown below.

Now select the Normal To viewpoint as in previous exercises to rotate the view so that you are looking straight at it, as shown below.

Dimension the position of the hole as shown on the Plain Jaw drawing at the end of this section, as shown on the right.

Once complete, click the green tick to accept and your Plain Jaw should like the one shown below.

Now in a similar way we will insert the M4 x 0.7 tapped hole on the top face of the Plain Jaw.

Select the Hole Wizard as before. This time select the options and set the sizes as shown below.

The hole specification is now complete, so as before it’s time to place the hole in the correct position.

To do this complete the following steps as before:

· Click the Positions tab at the top of the Hole Position menu.

· Select the face where you want to place the hole.

· Select the Normal To viewpoint to rotate the view so that you are looking straight at it.

· Dimension the position of the hole as shown on the Plain Jaw drawing at the end of this section.

Just as a reminder, pictures of these steps are shown below

To insert the final hole, select the Hole Wizard as before. This time select the options and set the sizes as shown below.