After sending the parts out for hardening and grinding I made the flange that will keep the lower bearings outer races togehter as well as house the seal. It turned out quite nice:
I also picked up a pneumatic cylinder for the drawbar. It's a 100mm bore, double acting and will provide the required force to compress the spring washers. It has a stroke of 50mm which is way to long so I'll probably end up shortening it quite a bit.
If my calcualtions are right the clamping force will be around 3000N and it will take around 4500N to press the drawbar down far enough for the tool to come out.
And this is how it hopefully will end when it's done:
I haven't figured out how to mount the motor yet. It may very well be that I have to change to a smaller motor in order to able to fit it, but we'll see when the time comes.
About the machine itself. I don't have that many pictures of the actual building process but I'll attach a couple here. It's built around a Bosch alu-extrusion 190X80mm and uses ISEL ballscrews and linear ways. The first photo shows the machine with X- & Y-axis ready:
Next one i a closup of the bottom side showing the ballscrew, linear ways, bearing blocks, motor mounts, and shaft coupler. Each ballscrew has two 7200B angular contact bearings at the driven end and a single deep groove ballbearing at the other end.
Here's one showing it with the ER16 spindle that is currently on the machine. The motor is 1100W three-phase controlled by a VFD from Mach3.
The stepper motors are ~3.5Nm driven by Geckodrive G210's
để chia sẻ bài viết lên facebook
Trả lời kèm Trích dẫn