Does the stock need to feed thru the chuck (like a bar feeder), or will it be individual blanks loaded by the operator?
Is the stock round (3-jaw) or square (4-jaw) Googling "power lathe chuck" will find you lots of chucks that are tightened (with some modest stroke) by a draw-tube, usually controlled by a pneumatic or hydraulic closer. Prices start at $2000 and go up fast. I think they adjust the grip range by removing the upper jaws from the limited-stroke master jaws and re-attaching them further in or out. I'm guessing that this machine will have a CNC controlled rotary axis. If it can do absolute angles (for example, if there is an index pulse on the encoder), you could use a regular lathe chuck (either 3-jaw or 4-jaw self-centering) and rig an "auto chuck wrench" for it. Short linear slide actuated by a small air cylinder. On the slide, a gearmotor and a square-ended shaft to fit the lathe chuck's key hole. Index the chuck so its key hole is aligned with the slide. Actuate the air cylinder to push the slide in, and slowly rotate the motor/shaft until I microswitch says that the slide is all the way in and the shaft is engaged. Then use the motor to tighten or loosen the chuck. When done, actuate the air cylinder the other way to pull the slide back so the chuck can rotate. John On Fri, Jul 10, 2015, at 11:56 AM, Viesturs Lācis wrote: > Hello! > > I need to build a machine for rotary milling of wood parts. The thing > is that customer wants the parts in the rotary head to be swapped > automatically, so some kind of cnc-operated chuck is needed. > I would appreciate, if somebody could share a link to something like > that. Total range of parts to be machined is 13 to 40 mm, but I do > understand that operator would have to set up the jaws for particular > diameter as the chuck itself would move the jaws for few milimeters > only. > Is there any simple way to make some diy version that actually works? > I was thinking about gripping the part between some rollers, but I do > not think that there would be no slipping etc. > Any suggestions or hints will be appreciated :) > > Viesturs > > ------------------------------------------------------------------------------ > Don't Limit Your Business. Reach for the Cloud. > GigeNET's Cloud Solutions provide you with the tools and support that > you need to offload your IT needs and focus on growing your business. > Configured For All Businesses. Start Your Cloud Today. > https://www.gigenetcloud.com/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users -- John Kasunich [email protected] ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
