90 Degree Square Shoulder Mills
Dapra Corp. has introduced 12mm Cutter Bodies and Inserts to its line of 90 Square Shoulder precision mills.
Operation / Process
Machining
What’s your Q-prime number?
A shop that grinds tungsten-carbide endmills using a resin-bonded diamond wheel turned to Dr. Jeffrey Badger for the 37th episode of Cutting Tool Engineering magazine's Grinding Doc Video Series because one of the shop's wheel suppliers was talking about Q prime values. According to the supplier, the shop should be using a Q prime value of 6 or 7. So the shop asked the Grinding Doc, "What's up with Q prime values?"
Keeping cool grinding stainless
Dear Doc: I grind the ODs and IDs of stainless steel bearings and have a much tougher time than when grinding hardened steel. Why?
Fight, fight for old Manufacturing U.
When I read about The Brookings Institution's proposal to develop 20 U.S. manufacturing universities, my first thought was "what will the mascots be for the football teams?" Purdue already has the time-honored "Boilermakers" moniker but what about the others? Would they be the Michigan Machinists, the Caltech CAD/CAMs, the Lehigh Lasers or, maybe, the Fightin' Facemills?
Cutting costs with tool reconditioning
High-performance cutting tools can provide increased efficiency and productivity, but they can also be a drain on tooling budgets. Cost-justifying these tools often requires regrinding and reconditioning them when they are worn or damaged. A successful reconditioning program reduces tooling costs by extending life as long as possible.
Still more tips for a manual mill
Continuing and concluding the theme of my previous two columns, this month's installment provides additional tips for enhancing the operation of a manual milling machine.
The chase is over
Prevent sealed bearings from overheating in a live tooling head. A live tooling head with coolant-fed bearings.
Fast to the finish
Enhance PCD cutting tool design while decreasing processing times. SOLUTION: A 6-axis rotary erosion machine.
Coolant filtration enhances grinding precision
Provide centerless grinding machines that can produce parts with continually tightening size and surface finish requirements. Customized coolant filtration equipment.
The science of milling sounds
Milling sounds range from loud to quiet, and experienced machinists <br />often use those sounds to judge what is occurring in the cutting zone. It is difficult to position a sensor such as an accelerometer or a displacement probe close to the cutting zone, and it is often a challenge to see the cutting zone, but the sounds are pervasive.
Why so cross?
Drilling cross-holes in some parts is no big deal. These are often simple parts, such as aluminum valve bodies, where the holes aren't too deep and meet on-center, and the customer can live with a small burr at the intersection.
Shifting gears
Imagine a gear milling method where the toolpath -- not the tool shape -- determines gear characteristics such as diametral pitch or pressure angle. A new concept, involute milling, provides that functionality while delivering machining efficiency and production versatility. The result is a "democratization" of gear milling, moving the process from single-purpose, dedicated machine tools to multipurpose machines that can produce small batches economically because no costly hobs or gashers are needed.