Removing zinc residue from threads of galvanized parts
Our customer is active in the field of hot-dip galvanizing.
The company stands for quality, delivery reliability and flexibility. However, it was facing a major challenge in batch galvanizing using the dipping process, as it had to integrate the work processes into the organization and at the same time wanted to improve occupational safety and ergonomics for its employees, as well as productivity. Due to the requirements of its end customers, we were asked to look into the problem and find a solution.
During hot-dip galvanizing, the existing threads are also galvanized. Due to the thick layer of zinc applied to the threads, they were no longer usable. This meant that after galvanizing, the excess had to be milled out manually to make the threads usable again. At the same time, not too much could be removed.
Through constant communication between the customer and our sales representative, including during on-site consultation visits, we developed the following solution. A larger "Shark" tapping machine and a smaller "Tiger" machine were purchased for different thread sizes. The thread cutters apply modified torques to remove the excess from the threads without completely removing the applied material. Both machines are ideal for re-cutting the threads, as their precision and smooth running enable them to find the gate again independently and remove the excess zinc.
Carrying out the thread re-cutting step with the thread cutting machines saves many hours of work on the existing milling machines. It is no longer necessary to re-clamp on the milling machine after galvanizing.
There is also no need to write separate milling programs in which only the threads are milled.
Incorrect feed or a jammed compensating chuck on the CNC machine could result in costly tool breakage. Such breakage is avoided thanks to our threading machines. This also saves our customers the inconvenience of having to drill out or, in the worst case, re-produce the workpiece.
The most powerful of our electric tapping machines
The Roscamat Shark electric threading machine is the most powerful of our machines. It can cut threads up to M36 in steel and M42 in aluminum. Various change gears allow you to cut smaller threads at very high speed and large threads with high torque. The machine is equipped with a cutting depth adjustment as standard, which automatically switches to reverse as soon as the preset and desired depth is reached.
The lubrication system, which is also included, significantly increases the service life of your taps and thread formers.
Thanks to the sophisticated design of the machine, it is handy, compact and torsion-resistant despite its strength.
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