18. The outer periphery of the MG TC front wing with rust and fatigue cracks is put under light

As usual an interesting view on the magic Eckold machine. Simply described the tool introduced this time, the dome shaping tool, can be said to have the opposite function than the tool used in blogspot 17.

The work started with the rear inner part of the wing, the area where the wing and the outer part of the body is fitted close together separated by the wing beading. This time the new part was easy to make, after cutting a suitable piece of sheet in the bench shear it was bent in the folding machine, almost in 90 degrees.

After the old part was removed the new one was carefully dot welded in position, Image 1. The removed rusty part, hold by a magnet, can be seen in the picture.

Image 1 The rusty inner part of the wing during the replacement operation. The removed and rusty part in the background.

With the rear end of the wing replaced with a new piece of sheet, see the marked area in Image 3 in blogspot 17, a previous made template was used to mark out the surplus material, Image 2. Note the use of a steel scale to adjust the position of the template in –X direction, see the book, and the arrow marking out the correct angle. Both the length and the angle are of great importance. At the end of the wing the running board should be bolted with a thin and smoothed shaped slot between the board and the body. And further, the rear end of the board must have a slot to the rear wing.

Image 2 Control of the wing length
Image 3 Surplus material removed and the end closed.

A new rear panel was made with the new running board front end as a template and dot welded to the end of the wing, image 3. Note the shape of holes for the screws. Similar oblong holes but turned 90 degrees were made in the corresponding running board end, Image 4, giving increased adjusting possibilities.

Image 4 Rear front wing and running board ends. Note the directions of the holes.

A control with a steel scale of the shape of the lower edge of the wing and the board revealed a deviation in shape between the two parts, Image 5. A new piece of sheet with correct shape was cut in the bench shear and the bend for the wire was created in the swage machine, Image 6.

Image 5 The front wing rear end and the running board front end differs a lot.
Image 6 Preparing in the swage machine for the wire.

To give the new panel the right shape it was shrunk. The shape was controlled against the wing and the running board, with the new panel was hold in place by welding clamps, Image 7.

Image 7 Controll of the shape.

The cutting line for the removal of the old sheet was made with a scriber, Image 8. Note that the cutting line was made slightly outside the new panel by holding the scriber in an angle. During the welding the new panel was hold firm to the old without any gap to give a smooth edge joint between new and old sheet along the lower edge.

Image 8 Marking with the scriber.

The removal of the old panel is worth a short comment: if possible the old wire, if in good condition, was intended to still be used, saving some time and effort. With the old sheet removed the wire was found to be good enough to keep. The removal of the sheet wrapped around the wire was the critical part of the work.

In the book the description of a specially made spindle for worn out cutting discs was described in the text and with a drawing. With the spindle adapted with a super thin cutting disc in a small air grinder the front end was cut as in Image 9. The crucial point during this work was to leave the wire untouched. This is of great importance, see the book

Image 9 Careful removal of the old sheet with a cutting disc and the special spindle in a small grinder.

If the wire was in need of a replacement the ends of the new wire and the old one must be welded together. A tricky operation described in detail in the book. If left without welding, the wired edge will crack after some time!

The Eckold tools demonstrated this time, see the short movie, is the dome shaping tool, Image 10. See the book for more detailed information. The effect of the tool is similar to the use of a mallet and a sandbag but the result is considerable smoother and made in a shorter time. Well made, read carefully with gradually increased but gentle stroke force, the finish is close to the finish achieved in the English wheel and easily corrected in the wheel up to the usual wheel standard, see the book.

Image 10 Eckold Kraftformer dome shaping tool.

The panel in image 11 is the center part of a roof beam at the rear end of the roof for a Chevrolet Impala -58. The profile was bent in the folding machine and given a light bow shape with the dome shaping tool, Image 12.

Image 11 The gently bended roof beam.
Image 12 Bending of the beam with dome shaping tool.

Another example of a part mainly created with the dome shaping g tool is the lower part of the rear panel for a Volvo P 1800. After shaping in the Eckold machine, Image 13, and a brief correcting treatment in the English wheel, Image 14, the new panel was tested on the car, Image 15.

Image 13 Shaping of a double curvature with the dome shaping tool in the Eckold.
Image 14 A brief treatment in the English wheel enhancing the finish.
Image 15 Testing the shape of the new panel.

The tool is available in several sizes from 60 up to 150 mm diameter. As with the tool in blogspot 17 the good manner of the tool depends on its rubber cushions.

To be continued……

Panel Beating Doctor Bengt Blad

At this point in my life when I was about three quarters through the medical schooI I discovered the English wheel and the Eckold machine, and, one thing leading to another - no more time for med school.

More about the book

This book, with around 1,500 pages of reader-friendly text and about as many illustrations, is a summary of 40 years of working with vintage, collectors' and racing cars.