HOLEMAKING
“If a customer starts a job and expects 1000 holes per drill, then the drill design needs to be capable of always producing to the level needed,” said Joe Kueter, director of manufacturing and engineering at M.A. Ford Manufacturing Co. (Davenport, IA). “The details of the application, such as hole depth, can make a difference in the design of the tool. Some thin part materials can benefi t from tool designs that cut with less force.”
“Drilling products need to produce accurate and consistent holes reliably.”
Producers of holemaking equipment also have to take into account the geometry of drills, various types of coatings and removing chips as drilling occurs. Such factors “must be applied in the right balance in accordance to the material and holemaking application,” said Marlon Blandon, thread mills manager for Emuge Corp. (West Boylston, MA).
ally very poor in these types of materials. Customers are asking for longer tool life.”
The company is developing a new MVS drill for deep-hole drilling, which is to come out in spring 2016. The new drill is to have a harder grade “which should translate into longer tool life,” Alex said. It will also have larger coolant holes to reduce heat and “evacuate the chips quicker out of the hole.” Alex said, in general, double margin drills add strength
and produce more accurate holes. “Since manufacturing is becoming more automated, the machines are being untend- ed, therefore, a strong, reliable drill is very important. Double margin drills give you that added security.”
‘Higher Speeds and Feeds’ “The rising use of high-temp alloys forces tool manufac-
turers to design holemaking tools to run with higher speeds and feeds,” said Emuge’s Blandon. “Materials like titanium and Inconel are driving special geometry and coatings of drilling tools.”
Emuge’s EF-VA geometry is designed for titanium and stainless steels. The drills have an increased back taper for “maximum stability and chip control when used in these diffi cult materials,” Blandon said.
The company said its EF Series drill works well in 718 Inconel. EF solid carbide drills have a double margin design with a “proprietary coating and carbide substrate.”
Constant Improvement M.A. Ford offers various high-performance
An Emuge Corp. drill works on a hole for a piece of equipment.
What follows are examples of how producers of holemak- ing equipment are adjusting to industry changes.
More Automated “Customers are machining more and more superalloys,” said Nika Alex, a product specialist for drilling at Mitsubishi Materials USA Corp. (Fountain Valley, CA). “Tool life is gener-
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products as well as a custom tool division that “seeks out the best carbide, geometry and coatings for demanding operations which do not allow a standard product,” Kueter said. The company tries to design drills that can work on a variety of materials, Kueter said. The Cyclone CXD double margin drill, for example, covers a range of materials from carbon steel to
titanium. The manufacturer also offers its 305 series micro drill “due to the increased number of micro holes being produced in medical and aerospace applications,” Kueter said. Improving tool life requires constantly improving the prod- uct line, Kueter said. “It’s a combination of consistent, high- performance carbide grades, enhanced grinding techniques and new and improved coatings,” he said.
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