The threads on the fastener products are manufactured using dies, roller or flat, depending on the design rezbonakatnogo machine.
The thread on the product formed by plastic deformation of the metal. It is important to correctly configure rezbonakatnyi tool that is exactly the position of the one thread rolling tool relative to the other.
There is basically one single position of thread rolling dies in space, which will allow to produce high quality threads.
The task of the three-dimensional interpolation, where the change in the value of a coordinate axis changes the physical position of the threaded grooves on three parameters mutual position in space, identify the situation.
Only a precise positioning of the die relative to the other will provide high quality thread. Even a small misalignment in the setting thread rolling tool leads to splitting of the thread or yarn slippage of the workpiece. Both of these phenomena is not possible to obtain a high quality thread that is definitely the ultimate marriage articles.
Tune dies without a suitable measuring device — not an easy task.
In practice, many Rolling machines are equipped with special standard measuring systems where the monitor displays the current value of the radial pressure.
These systems are equipped with a sensor and can control the process of the formation of the thread, informing about the change of the radial rolling forces, and not much help to the operator when setting up the instrument.
Experts who have studied the formation of the thread in the production of fasteners in the framework of the German association of manufacturers of fasteners, eventually came to the conclusion that the existing standards for the control of measuring systems must be changed. It is necessary in such systems to use more sensors for more information.
The main attention was paid to such a system forces which occur during the formation of the thread.
Force can be divided into three groups:
— radial forces causing the formation of the thread;
— vertical or axial forces;
— horizontal forces that cause movement of the workpiece between the dies.
To solve these problems in a new generation of control systems have been used piezoelectric sensors IMPAX-SK new design, characterized by great sensitivity.
A feature of the new generation of sensors that are able to accommodate not only the direct effects caused by radial, horizontal and vertical forces but also capable of capturing and indirect effects of the horizontal forces.
Sensors Series IMPAX-SK can be installed into the threaded hole of the adjusting screws, as well as directly in the nest dies installation.