This project, a collaboration between UBC Forestry and Architecture, is focused on developing a robot capable of "3D printing" thin strip wood veneers using a lignin-welding laser treatment process. The ultimate aim is to create custom, organic concrete forms for use in construction. Leveraging the natural flexibility and spring of the wood veneer, the process allows for the creation of organic, fluid shapes. Our team's contribution entailed crafting a bespoke heat press capable of exerting over 7 MPa at temperatures ranging from 130 to 200 degrees Celsius. Additionally, we engineered a cylindrical coordinate CNC frame from scratch. This setup enabled us to validate the concept by autonomously fabricating cylinders using the treated wood.
The build comprised several key components: a miniature screw press equipped with bellville washer force feedback, a locking boom arm designed to function as an anvil for generating sturdy surfaces against which the thin-walled structures were pressed, and temperature control managed through 3D printer thermal slugs. A veneer feeder system facilitated the loading, pushing, pulling, and trimming of wood as it was added to the structure. The CNC stage is capable of adjustments in cylindrical coordinates rather than linear, allowing for precise modifications in theta, Z, and R. Given the anticipated high forces, extensive mechanical validation was necessary, alongside machining of high-strength materials such as stainless steel. Virtually every component was made by myself or a teammate.