'Metal Fabrication' is the creation of metal structures by cutting and bending sheet-metal, than assembling those formed components into a pre-determined product.
‘Applied Metal Boatbuilding Methods’ – ‘Sheetmetal Pattern Development’ picks up after the hull and deck of a boat is constructed. Devoid of all features or a 'Bare Hull'. It begins another phase of the build with the fabrication of integrals such as but not limited to: Coamings, Hatches, Window Ports, Companionways, and Tanks. Some builder may ever want to fabricate there own mast and booms.
Fabrication of these components by the builder is another major economic advantage of building in steel or aluminum. Components such as these can be fabricated for nickels and dimes on the dollar over purchased manufactured versions of the product.
Custom fabricated steel components are also more in keeping with the hulls construction material ensuing a harmonious steel design that is not attainable using components designed for another construction material.
Layout and fabrication of these type of components are determined by well established empirical formulas known as ‘Bend Allowance’ and ‘Bend Deduction’. These formulas are in universal use throughout the metal fabrication industry.
‘Applied Metal Boatbuilding Methods’ – ‘Sheetmetal Pattern Development’ is a Metal Fabricators course in ‘Precision Sheet Metal Layout’. Teaching the theory, principles and application of these well established Sheetmetal layout formulas to calculate the cut sizes, locations of bend lines and interior features demonstrated through the fabrication of marine components typical to steel and aluminum pleasure craft.
It is a complete guide to all persons in the metal fabrication industry be they Precision Metal Fabricators or ‘One Of’ Metal Boat Builders. ‘Applied Metal Boatbuilding Methods’ – ‘Sheetmetal Pattern Development’ is basic to rounding out your metalworking layout skills.
Part I - Fundamentals:
Bend Angles: Page 10
Bend Terminology: Page 12
Bend Dimensions: Page 14
Press Brake Tooling: Page 17
Part II - Preliminary Calculations:
Inside Radius Calculations: Page 21
Bending Modes: Page 22
Tonnage Calculations: Page 28
Round Punch Calculations: Page 31
Bump Forming: Page 33
Tool – Bend Conflicts: Page 34
Part III – Formulas:
Formula Accuracies: Page 38
Bend Allowance: Page 39
Bend Deduction: Page 47
Test Bending: Page 52
Dimension Conversion : Page 56
Part IV - Shop Drawings:
Component Design and Layout: Page 66
Part V – Deck Openings:
Raised Coamings: Page 80
Solid Hatch Cover: Page 83
Skylight Hatch Cover: Page 89
Hatches: Page 92
Part VI – Port-Lights:
Introduction: Page 102
Fixed Coaming Port-Lights: Page 103
Fixed Mitered Port-Light: Page 110
Installing Production Ports Page 117
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