Method for metal bonding

A method for bonding a metal sheet assembly, the method comprising:

• providing a first metal sheet and a first frame member;
• performing a bonding preparation to the first metal sheet and the first frame member, wherein the bonding preparation comprises a pre-fitting step, a hanging step, and a cleaning step;
• laying the first frame member flat on the first metal sheet;
• providing a second metal sheet and a second frame member;
• performing the bonding preparation to the second metal sheet and the second frame member;
• laying the second frame member flat on the second metal sheet;
• placing the second metal sheet and the second frame member on top of the first metal sheet and the first frame member to form a stack;
• placing the stack inside an autoclave;
• autoclaving the stack, thereby bonding the first frame member to the first metal sheet to form a first sheet assembly and bonding the second frame member to the second metal sheet to form a second sheet assembly, wherein the first sheet assembly and the second sheet assembly are each substantially flat;
• removing the stack from the autoclave;
• unstacking the first sheet assembly and the second sheet assembly;
• roll forming the first sheet assembly and roll forming the second sheet assembly.

A method for bonding metal sheet assemblies, the method comprising:

• providing a plurality of metal sheets and a plurality of frame members;
• pre-fitting the metal sheets;
• hanging the metal sheets;
• cleaning the metal sheets;
• placing a first frame member on a first metal sheet and placing a second frame member on a second metal sheet;
• sealing the first metal sheet in a bag and sealing the second metal sheet in a bag;
• stacking the second metal sheet onto the first metal sheet to form a sheet stack;
• placing the sheet stack into an autoclave;
• autoclaving the sheet stack thereby forming and curing a first bond between the first metal sheet and the first frame member and forming and curing a second bond between the second metal sheet and the second frame member;
• removing the sheet stack from the autoclave;
• unsealing the first metal sheet and unsealing the second metal sheet;
• unstacking the second metal sheet from the first metal sheet;
• and
• roll forming each of the first metal sheet and the second metal sheet thereby forming a first curved metal sheet and a second curved metal sheet;
• bonding the first curved metal sheet to an additional frame member, and;
• bonding the second curved metal sheet to a second additional frame member.