Article provided by ANCA
Fraisa SA is a family-owned business that offers its customers a complete range of endmills, drills and taps. The toolmaker provides a full customer service offering with logistics, specials, regrinding and recycling of tools. With its headquarters in Bellach, Switzerland, Fraisa has a strong position in Europe and entered the U.S. and Chinese markets in the last 10 years. Fraisa USA Inc. is located in New Brighton, Minnesota.
Josef Maushart, CEO and president of Fraisa said: “I think opportunity in the tool and cutter market is significant. I expect a further growth of 2 to 3 percent a year and see especially high growth in solid round tools. To meet this demand, we are moving into a complete renewal of our tap production. We knew that providing taps was a unique selling proposition for us as most of our competitors only manufacture endmills and drills. However, with high labor costs in Switzerland, we needed to incorporate automation into the manufacturing process and that took us to the edge of technology as far as cutting tool production is concerned, especially with a complex tool like a tap.”
By combining operations traditionally performed on more than one grinding machine into one machine, Fraisa automated its tap production. Photos courtesy of ANCA
The classic way to grind a tap is to first grind the flute and then on a separate machine, grind the thread. The ANCA TapXcell combines these operations on a single machine, which then meant there was opportunity to automate the entire process. Fraisa also wanted the flexibility to change the product without people being involved in the fabrication for small and large lot orders.
Amelinda Ilardi, engineering project manager, facilitated the collaboration with Fraisa. Amelinda said: “To remain competitive in high cost labor markets like Switzerland, Fraisa wanted a machine that could grind multiple tap types unmanned for 50 hours. There was no solution on the market and having collaborated with ANCA in the past, Fraisa approached us to develop the technology they needed.
“To enable the machine to run unmanned, we needed an in-process measurement capability to ensure grinding stability. To do this, we designed a new application where the thread pitch diameter is measured by a Renishaw MP250 touch probe. Measuring to ±0.002mm accuracy, this feature is crucial as it ensures every batch of taps are of consistently high quality.
“Not only can the machine run unmanned for 50 hours, it is fully connected being linked to Fraisa’s factory ERP system for further efficiency and reliable production data gains. The machine can be remotely monitored using our RedaX product and automatically sends notifications to keep Fraisa’s remote staff aware of the machines progress and also any issues or faults that need to be addressed. In addition, RedaX can be used to track the productivity and up-time of multiple ANCA machines.
“ANCA’s commitment to innovation is by being able to deliver custom solutions as an enhancement to our standard product. This requires agile response and capacity in our engineering to deliver what can be quite a complex set of customer requirements.”
The TapXcell is a complete production package for tap manufacturers. The grinder itself includes a 37kW grinding spindle that enables grinding of even taps above M32, as well us dual wheel dressers and between-center work holding. The iTap software package makes setting up all machine operations easy, even for the more complex tool geometries. Grinding capability is complemented by the TXcell’s robot loader, which manages auto changing of up to 24-wheel packs and tool changing. For Fraisa, ANCA introduced an extended-capacity turntable to the current TapXcell design to meet the additional capacity requirements.
Maushart continued: “ANCA has the capability and will to answer our specific requirements and collaborate with our teams to customise a solution fairly quickly. From previous projects I knew they had an experienced engineering team with the capabilities and capacity to take on complex challenges such as automating tap grinding.
Josef Maushart is CEO and president of Fraisa.
“As a CEO, I am often asked how a country with high labor costs like Switzerland can have such a thriving manufacturing sector. The answer is easy, Switzerland is one of the most innovative countries in the world. At Fraisa, innovation means we have a steady product renewal process and renew on average 800 of our 8,000 articles each year. This is the evolutionary aspect of our business with daily improvements. But to really succeed from time to time it is important to have a revolutionary innovation.
“With the change from the manned three shift operation for five days a week to the unmanned seven days operation we cut costs by half. This meant we increased the productive hours from 105, on average, to 150 per machine per week, which will deliver serious efficiency benefits.”
Fraisa does not see unmanned production as a negative for its employees. Maushart continued, “There are several advantages for our workers. We made the decision to retain their salary if they invested more time in upskilling themselves in other manufacturing processes. This benefits us as we have a more engaged and skilled workforce who can focus on more value-added work rather than just monitoring machines. It also offers them a better work-life balance by not having to work on weekends or shift work.”
Related Glossary Terms
Machining operation in which material is removed from the workpiece by a powered abrasive wheel, stone, belt, paste, sheet, compound, slurry, etc. Takes various forms: surface grinding (creates flat and/or squared surfaces); cylindrical grinding (for external cylindrical and tapered shapes, fillets, undercuts, etc.); centerless grinding; chamfering; thread and form grinding; tool and cutter grinding; offhand grinding; lapping and polishing (grinding with extremely fine grits to create ultrasmooth surfaces); honing; and disc grinding.
- grinding machine
Powers a grinding wheel or other abrasive tool for the purpose of removing metal and finishing workpieces to close tolerances. Provides smooth, square, parallel and accurate workpiece surfaces. When ultrasmooth surfaces and finishes on the order of microns are required, lapping and honing machines (precision grinders that run abrasives with extremely fine, uniform grits) are used. In its “finishing” role, the grinder is perhaps the most widely used machine tool. Various styles are available: bench and pedestal grinders for sharpening lathe bits and drills; surface grinders for producing square, parallel, smooth and accurate parts; cylindrical and centerless grinders; center-hole grinders; form grinders; facemill and endmill grinders; gear-cutting grinders; jig grinders; abrasive belt (backstand, swing-frame, belt-roll) grinders; tool and cutter grinders for sharpening and resharpening cutting tools; carbide grinders; hand-held die grinders; and abrasive cutoff saws.
1. On a saw blade, the number of teeth per inch. 2. In threading, the number of threads per inch.
Cylindrical tool that cuts internal threads and has flutes to remove chips and carry tapping fluid to the point of cut. Normally used on a drill press or tapping machine but also may be operated manually. See tapping.