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Harold Hall

Workshop Processes

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I have used this in my cabinet making activities where the veneer is heated with a hot iron that then melts the film. I have the iron on a medium setting, probably around 100°C which gives an indication of the temperature required both faceplate and workpiece would of course have to be heated. I have not though yet found a need to use the method in my metalworking workshop. There are a number of suppliers listed on the Internet

 

Just Screws Nuts and Washers

In a few cases and by far the best method if possible is to use holes or lugs in the workpiece to enable it to be clamped directly to the faceplate using just screws, nuts and washers. It will though only give limited adjustment in terms of the part's position on the faceplate making it impractical in some cases where otherwise it would seem a good idea. However, when it can be used it will be a very simple and secure method.

 

Having mentioned that this is a secure method leads me to return to the methods suggested and make a few comments about their use collectively. Most important in every case is the security of the final assembly, will it be able to withstand the machining and centrifugal forces, if not then disaster will be the result. As there are no hard and fast rules then careful thought must be given each time to the security of the assembly.

 

Rarely will a single clamp be adequate so always start by finding space for a second clamp and a third, even a fourth if the impending machining operation is particularly arduous, Remember, one too many clamps is far better than one to few. In some cases the number of clamps that can be used will be limited by the fact that a large proportion of the workpiece has to be available for machining. In this case, place some supports that rest against the workpieces edge so as to restrain any possible attempt to move, see Photograph 15. Of course, one does not have to restrict each application to just one clamping method do consider also mixing methods, say two faceplate dogs with two bar clamps typically.

 

Having therefor completed the assembly two final operations are required, 1, to go to each fixing and see that it has been fully tightened and 2, turn the faceplate by hand to ensure that it rotates without fouling any part of the machine. Having taken these precautions you will now be able to commence machining with confidence, well not quite, as the assembly now needs to be balanced.

Faceplate Using
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15