All-in-One becomes More-in-One

Amba’s All-in-One screw and bolt making machines can produce up to 1,400-mm-long special screws ready for sale in just one continuous process, starting with the feeding of the coiled bar into the machine. Screws of this type are typically used in wood construction. Even the machines of the previous generation can perform operations as diverse as head upsetting, tip cutting and thread rolling.

In line with its proven All-in-One principle, Amba has enhanced the versatility of its machines by adding further machining and forming functions. The new machines can produce up to 80 screws per minute, including notch milling and other machining operations.

The newly added functions include screw head turning, inline notch milling, hole drilling and cold pressing the screw ends. It is even possible to press a square metal head onto the stud end to make the screws suitable for open-end wrenches.

Double-threaded screws

Another new function provides the option to roll two separate threads into the stud. To this purpose, a second threading roll is provided, which even makes it possible to produce special-purpose screws with different threads at the tip and head. This type of screws is commonly used in structural applications. One such application is the mounting of insulating material on wooden structures, where double-threaded screws assure that the insulation material is fixed at the correct distance from the base material. The second threading roll can also be used to make full-thread screws of up to 300 mm length.

Lars Hennig, one of the Managing Directors of Amba, sees high demand for the new machines: “Screw manufacturers have recently been showing particular interest in the manufacturing of long screws with two different threads. From companies that manufacture screws for the construction industry, we have been receiving many enquiries about high-performance machines that can produce wood and roof screws at high rates.”

More steps within one cycle

Amba machines are noted for their exceptionally high throughput rates, which are achieved, among other things, by the Amba-designed spindle-based transport system. Due to this technology, the new machines can perform additional forming operations within the very short cycle times typical of all Amba machinery and systems. Robotized picking, placing and sorting of the finished screws is another efficiency-enhancing feature of the machines.