Manufacturing plants are always looking to improve operational efficiency and product quality. However, the use of monitoring tools can sometimes lead to subjective assessments of tool wear or breakage. In response to this challenge, Heidenhain has introduced the VT 122 measuring camera with VTC software and the TD 110 tool breakage detector, providing solutions for monitoring tool breakage, presetting tools, and performing visual tool inspections.
The VT 122 can perform magnification, inspection, and presetting of tools from within the machine's work envelope. Image used courtesy of the Heidenhain
Automated Tool Evaluation
The VT 122 measuring camera and VTC software system are designed for the Heidenhain CNC control TNC7. This integrated system offers three key functions: magnification, tool presetting, and visual tool inspection, eliminating the need to go to the measuring lab or a separate tool pre-setter. The system enables contactless inspection of tools of up to 100 mm in diameter and provides high-resolution images from within the machine's work envelope. This technology allows for a precise view of tool edges and comprehensive tool analysis without users needing to leave their desks.
The VT 122 features a bright light and camera that takes close-up and panoramic images from various angles to inspect the entire circumference of tools. The software enables users to specify the desired views to be generated after tool cleaning, which is particularly beneficial for tools with multiple cutting edges like end mills or inserted drills.
A Camera Inside the Machine?
One of the main concerns regarding this equipment is the presence of an expensive camera inside the machine with coolant. Nevertheless, Heidenhain has developed its vision system to be situated within the work envelope. The VT 122 vision system is robust and sealed to prevent lubricants from impacting the camera. It is also possible to acquire cover glasses that can be readily replaced inside the machine. The camera is outfitted with integrated jets for tool cleaning prior to inspection.
The TD 110 can provide fast, on-machine tool breakage detection for tools with a minimum diameter of 0.4 mm. Image used courtesy of the Heidenhain
Tool Breakage Inspection
With machining operations becoming more and more automated, it is almost a necessity to have some sort of device to detect when a tool has broken to prevent a loss in productivity and minimize scrap. To aid in these struggles, Heidenhain has released the TD 110 tool breakage detector. This sensor performs machine tool breakage inspections without compressed air, making installation easier and reducing additional hardware. Only a single cable carrying power and communication needs to be installed.
This non-contact probe is capable of inspecting tools with a diameter of at least 0.4 mm and can detect a length change of at least 2 mm. The measurement occurs inside the machine with the spindle rotating at its operating speed and utilizes inductive measurement technology. This process and technology enhance process reliability and decrease tool inspection time by up to six seconds per inspection.
