In the sheet metal industry chatter marks on the finished metal product can cause significant issues for customers. Marks on metal strip affect the quality of the product in industries such as automotive and can-making and can often lead to finished coils being rejected by the customer. These marks are often invisible to the naked eye but can show up further down the line, for example when a car door is being painted.
One of the main causes of chatter marks on finished metal is marked rolls being used in the mill. This is where the rolls used in the rolling mills arrive with chatter marks caused by the roll grinding process. As with the finished product, the chatter marks on the roll can often be invisible to the naked eye, meaning that the grinder operator has no way to tell whether the rolls have chatter marks or not before they are sent to the mill.
Example of chatter marks on a finished strip of metal from a rolling mill
Example of chatter marks on a finished strip of metal from a rolling mill
An ideal solution to this problem is this innovative Chatter_Detect system. Since Farrat’s acquisition of UniVib – a specialist industrial vibration consultancy – in 2020, Farrat has made use of Chatter_Detect technology in a wide range of businesses around the world.
Chatter_Detect is a post-process roll inspection system that detects chatter marks that may have been ground onto the surface of finish-ground rolls by vibrations generated during the grinding process.
It uses a high-resolution, non-contact capacitive sensor that can detect invisible chatter marks which can be small but still significant enough to affect the rolling process and cause chatter on the strip.
The Chatter_Detect system can identify the pitch and depth of the chatter marks and also enables the operator to set a depth threshold level, so that marks that are not significant enough to affect the rolling process, don’t trigger the Chatter_Detect alarm.
Chatter Detect system
The Chatter_Detect system has helped some of the biggest names in the sheet metal industry ensure that only chatter free rolls are sent to the mill and quality is maintained throughout the roll grinding process.
Chatter_Detect with Farrat
If you’re looking to monitor floor vibration levels or for a bespoke, tailored vibration isolation solution that optimises performance, efficiency and accuracy of industrial machinery within an industrial or production setting, get in touch with the team at Farrat for more information.
