Showing posts with label sheet metal work. Show all posts
Showing posts with label sheet metal work. Show all posts

Wednesday, December 12, 2018

"Aircraft Metal Work"

So here is an excellent book on aircraft metal work, and as would be expected a large section covers sheet metal work. This book was published by The US Government Printing Office in 1945 as a Navy Training Course.

In this book you will find 348 pages of great hands on instruction, covering most aspects and materials of aircraft fuselage production and repair methods. Check out the contents page below to see what is covered. It is a small djvu file but very clean and readable.

To download "Aircraft Metal Work" go to my Books - Free Downloads page, # 77 - 3.5 MB - djvu.

Friday, November 30, 2018

Cold Hammer Forming Of Sheet Metal

So when it comes to camping trailers, I have always found teardrop designs very appealing. I have one on my list, but when I get there I don't know. Over the years I have accumulated hundreds of pages of plans and pictures from around the web. A flared classic fender is a perfect match to compliment the teardrop shape, and would be my preferred design. Similar to this:

Or this.

An English Wheel or Planishing  Hammer will form these fenders, but if you don't do a lot of sheet metal forming, and would rather avoid the learning curve, and expense of one of these machines, cold hammer forming is a good option for the occasional project. I looked around the web and found a nice article on cold forming of a classic flared fender.

To download this step-by-step article click Forming Sheet Metal # 1, 256 KB - pdf.

 Above is a picture of the first page of the 12 page article. The article takes you step-by-step from a flat sheet below.

To this fully formed section of the fender.

This was all done cold working with hammers, sheet metal working chisels, and a wire form to guide the shape forming. My new 4' cold work RR anvil is perfect for this type of work. You may recall how I expanded the bottom of one of the doors on my band sawmill by cold hammering.  This gives me the idea of another improvement, round off one end for doing circular work.

Friday, June 8, 2018

Operating A Small Slip Roll

If you like to work with sheet metal a slip roll is a very useful machine for forming circular and conical shapes out of sheet metal. Their are other ways of doing this with hand methods, but a slip roll makes for a easy, quick, and very neat job. Good quality rolls can be expensive, The import market has brought the price down quite a bit, with varied quality.

There are many plans around the web to make your own set of rolls, I have at least a couple I would like to upload in the future.

Following is a nice article on the operation of a small slip roll from the Winter 1954 PM Shop Notes.

Click to expand image, click again for best view, depending on screen size.