We where very excited to meet and greet many of our customers at the 2017 Western Tool & Supply Open House.
It was held at their San Jose, CA. on September 21- 22, 2017.
We featured quite a few featured products from our principals during the two day event. It was great discussing lots of technical applications that machinists brought to us!
What kind of burr can the sPINner remove?
We are often asked, “What kind of burr will the sPINner remove?” The standard answer is “a light burr”. This answer leaves a lot of room for interpretation. What is a light burr to some will be a heavy burr to others.
The rule of “Thumb”:
In order to form an initial evaluation if the sPINner will work on a particular part try the rule of “thumb”. As a general rule, if you can take a fingernail and remove the burr, the part has a good chance of testing well in the sPINner. Burrs heavier than this may tend to roll and flatten, but not be removed during the process.
A quick lesson on burrs:
A lighter burr can be loosely defined as a burr with a thin thickness at root (B1). As the amount of material holding the burr to the parent metal increases, a more aggressive deburring action is required to remove the burr. Using this definition it is possible to have burrs that are tall, yet are “lighter” by our definition because the thickness at the root is small. Burrs of this type are good candidates for the sPINner.
Short Heavy Burrs
An example of short, yet heavy burrs are the ridges created from drilling. When a drill breaks through a part a ridge is pushed up around the hole on the side where the drill breaks through. While this ridge can be short in burr height (H0), the thickness at burr root is wide. Often this material is more a part of the parent metal than the burr. These burrs will not be good candidates for the sPINner as a very aggressive and abrasive action that has a high stock removal rate is required to remove these burrs.
Another factor to weigh in this process is the material itself. More brittle materials will tend to have the burr break away from the part (parent metal) making the sPINner a good option.
Softer or more malleable material will tend to have the burr roll and flatten. Softer materials need to have a thinner thickness at root to be good candidates for the sPINner.
The famous actress Judy Garland is said to have adlibbed about fellow child-star Micky Rooney: "It's the little things that matter". For central Indiana based Greenwood Machine, little burrs in a 1mm slot, mattered a lot.
With 25 years in the business, Greenwood Machine's owner Fred McWilliams has loads of experience producing small, complex parts. His business began machining small, precision parts (primarily RF connectors) for the electronics industry, and has grown to include a variety of quick-setup, short run jobs, and also some high-end bicycle components.
When the opportunity to manufacturer the air pump came up, Fred decided to move quickly and increase capacity by purchasing a bar-fed, Citizen/Cincom M32 CNC swiss-type turning machine to expedite production of the air pump.
This configuration allowed them to perform 3 operations at once, giving them a big advantage in cycle time. Their customer asked that they produce prototypes within 3 weeks of the CNC machine hitting their floor.
During the few weeks they had to set-up the machine and begin running prototypes, the deburring problem was discovered by Manufacturing Engineering Manager Joe Bowman. Joe's background includes experience with ISO 9001 certification and 8 years in CNC machining. He manages all the manufacturing processes even down to the CNC programs and setups.
The parts and pins are placed in a deburring container and media solution is added. Next, the container is put into the machine and the cycle time and rotation speed is set. While it runs the pins are activated by a rotating magnetic plate underneath the deburring container. This causes the pins to rapidly reverse polarity, and jump up and down from 1 to 3 inches while rotating in the deburring container along with the parts. The parts and pins "spin" together to perform the deburring. The sPINner can even deburr internal cavities like slots and cross-drilled holes other media cannot reach.
Michael Harris, Vice President at Earth Chain said: “The sPINner works best on small, precision parts made from non-ferrous metals including aluminum, brass, copper, stainless steel, and even titanium.” The aggressiveness of the deburring is controlled by programming the speed of the magnetic plate and selecting from a variety of media sizes. The machine is easily programmed and can run unattended.
Our blog section is written by several different people. Sometimes, it from our team here at Next Generation Tooling at other times it's by one of the wonderful manufacturer's we represent in California and Nevada