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MACHINE TOOLS Tool grinding shop simplifies the cutting edge

Jun 17, 2020

United grinding, in a manufacturing revolutionising move, introduced its CNC grinder line, Walter, to the Ceratizit Tools shop floor. Not only did it garner quick reputation for increasing productivity with precision, it also became an incredibly well-received product line of United Grinding amongst private label companies. The present case study explores how various tools machines from United Grinding helped Ceratizit Tools to achieve its philosophy of putting quality first whilst brining ease of production to shop floor operators.

Ceratizit Tools in Rancho Cordova, California, considered the advancement from manual to CNC tool grinding equipment a big deal, until the shop took its most recent major step forward concerning manufacturing technology. Ceratizit simultaneously incorporated several advanced tool measurement systems that catapulted the shop’s quality assurance and overall production to new levels. The first carbide roughing tool the shop designed and produced was like nothing else in the market. Competitors’ carbide end mills were all based on old high-speed milling designs with standard 30-degree cutting angles, while Ceratizit carbide roughing tools introduced European geometries to the high-performance cutting tool market.

Manual to machine-driven

To produce its innovative cutting tools, Ceratizit looked for latest grinding technologies, and at that time, CNC grinder technology had begun to revolutionise manufacturing. When the shop installed its first CNC grinder, the machine quickly garnered a reputation on the shop floor for accuracy and productivity. Even the shop’s manual grinding machine operators were amazed at the newfound ability to walk away from a machine as it ran a pre-set program.

That shop’s first CNC grinder was a Walter from United Grinding, and it helped Ceratizit grow its line of solid-carbide end mills that soon caught the attention of a private label company. It wanted the shop to develop and supply a brand-new line of cutting tools for them, with projections of about $750,000 worth of production needed in the first year to meet the initial demand. The tools were incredibly well received. Orders in the first year were double that of the projections. One CNC machine was simply unable to keep up with the skyrocketing demand, so Ceratizit returned to its trusted grinding technology supplier and acquired a second Walter machine from United Grinding. Over time, Ceratizit continued to add Walter machines to its line up, and today, the shop’s floor is home to a total of 22 Walter systems, including the Helitronic Power, Mini Power and Mini Automation grinders. But its most recent and boldest technology acquisition to date was a single order of seven highly advanced Walter Helicheck optical CNC tool measuring systems.

Quality priority for smoother connections

The Helichecks support Ceratizit’s goal and manufacturing philosophy of always putting quality above all else. Prior to the advanced tool measurement technology, the shop measured manually and used comparators — a system that offered limited quality certification and traceability — to check its finished parts. “When Helicheck measurement systems first came on the market, we quickly realised the advantages of the new technology and incorporated it into our production process,” said Mark Albertson, Production Manager, Ceratizit Tools. “With Helichecks’ precision and flexibility, we can guarantee the quality of our entire range of cutting tools along with the complete portfolio of our other products,” he added.

Trust and support also sold Ceratizit on Walter’s measurement technology. Through its long-standing relationship with United Grinding, the shop knows its supplier solves problems immediately when they arise. Ceratizit works closely with Stefan Krannitz, Measuring Product Specialist, United Grinding; Andrew Walenta, Application Engineer, United Grinding and Ulrich Brändle, Product Manager Metrology, Walter. “We are manufacturing the best tools and the best products, and to do that we need the best equipment,” commented Albertson. “We keep going back to United Grinding because they are a premium supplier. Their machines are well-engineered and well-designed,” he added.

Of the recent Helicheck acquisitions, the shop uses four Helicheck Pro systems and two Helicheck Plus 4-axis CNC measuring machines with standard 400 power cameras. Ceratizit’s final new Helicheck Plus features powerful, sophisticated camera technology, making it the most advanced of the group. The company uses the Helicheck Plus, equipped with a 1000 power CER camera, to measure its micro tools and edge-prepped tools. The machine also ensures that the finished cutting tool diameters are exactly within the specification. With a special reflected light unit and diffuser, the system measures even the smallest of details. During its edge prep process, Ceratizit removes small amounts of raw material from cutting tool edges and imparts slight radii on them. After the process, tools make smoother connections with workpiece surfaces, resulting in higher part quality and better surface finishes.

Automation maximising production

Ceratizit’s seven Helicheck measurement systems operate autonomously. An operator loads the tool and walks away while the Helicheck performs the measurement process. This autonomy allows the shop’s employees to be more productive. To further increase productivity, Ceratizit also incorporated an automatic loading machine, which they consider to be an important advancement. With automation, an employee does not have to constantly stand in front of a machine to load parts. The company runs as many of its 45 machines as possible over night to maximise the output of its 75 employees during their two shifts. Walter’s grinding technologies boost Ceratizit’s lights-out operations because of their closed-loop, self-correction capabilities. Probes on the grinders check part geometries and provide feedback to the machine. The machine, in turn, uses the feedback to correct its program in the middle of a run without the need for operator input. This allows the shop to run a larger variety of parts unattended. Thanks to the advanced Walter equipment, the shop can run parts lights out with loose tolerances — where grinders need no adjustments over the course of a long run — as well as run those parts with extremely tight tolerances. In lights-out operations, a single Walter grinder can crank out 240 half inch-diameter Ceratizit cutting tools per day.

Another essential feature of Walter’s grinding technology is its Helitronic Tool Studio CAD/CAM software that lets shops, such as Ceratizit, generate a wide variety of cutting tool types with the aid of its input assistance wizard. The programmer inputs a few pieces of geometry data and a stored database completes any missing data to form a complete part creation program. The 3D live simulation feature then displays an exact graphic representation of the tool to be created. Before Helitronic Tool Studio, Ceratizit would spend days trying to design a tool at the machine with special plastic and paper prototypes that simulated diamond wheels and carbide. Now, employees perfect tool programs from start to finish directly at their computers, and the shop is only limited by the imaginations of its designers. “Our software from United Grinding is integral to the redesign process,” said Albertson. “We alter the designs digitally and let the software prove the concept before we use time and resources for prototype creation. Without the software, we would spend weeks in front of the machine to determine what design changes can and cannot be achieved.”

Integrated production process

In addition to an expanded product line, the future of Ceratizit lies with adoption of intelligent manufacturing concepts, like Industry 4.0 and the advancement of the Industrial Internet of Things (IIoT). Currently, five out of seven of the company’s Helicheck systems are connected together and networked to a central database. The shop has connected workstations in its engineering and design department to that database, so engineers can instantaneously access programs and reports from its Helicheck measurement machines. This connectivity increases efficiency and provides the shop with a wealth of data to improve its production processes. “Tool measurement and integration of IIoT is the future of tool making,” said Krannitz. “Ceratizit is on the cutting edge of these developments, and the shop has made an investment that prepares it for the next manufacturing revolution,” he concluded.

Courtesy: UNITED GRINDING North America

Image Gallery

  • With Helitronic Tool Studio, employees perfect tool programs from start to finish directly at
    their computers, and the shop is only limited by the imaginations of its designers

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