The next level up in chassis design is brazed construction. A brazed chassis can use either dip or vacuum brazing methods, depending on the requirements.

Dip Brazed Construction

In general, a dip brazed chassis is easier and less complex than a vacuum brazed chassis. Dip brazing is best suited for open channel geometry, allowing the molten salt to flow out of the chassis without becoming trapped.

An example of open channel geometry is folded fins brazed to a cold wall, which provides extended surface area for a forced convection cold chassis. Typically, in a dip brazed chassis, the four walls and any extended surface area are processed through the dip brazing method to achieve both structural rigidity and improved thermal transfer.

Vacuum Brazed Construction

A vacuum brazed chassis is more suited for closed channel geometry where the path through the chassis appears completely sealed and where the presents of trapped salt may not be permitted by application. An example would be a chassis designed for liquid cooling where the liquid path may exist in multiple pieces or where there parallel passages for the liquid. In these it would be difficult to flush the part and ensure all salt is removed. When working with either brazed chassis method the design of the joints is a critical aspect both to achieve maximum strength and the complex shape that may be required.

Consultation for Joint Design

We prefer that you consult with us prior to specifying the joint type or location or provide us with a monolithic model so that we can review and determine how best to place the joints.