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| Bluechip:
--- Quote from: John Stevenson on June 23, 2010, 04:21:02 AM ---WELDED Good heavens man, I'd have expected some custom clamp with a mirror finish and ground to 3 nano microns of the clamps life. What is the world coming to ? welded ?? John S. --- End quote --- 3 nano microns ?? :scratch: Can I ask why you still persist in using the long-obsolete and archaic SI system of measurement ? The correct dimension should read '3.187 atto FOOTBALL PITCHES' , or, alternatively, '2.613 femto DOUBLE-DECKER BUSES'. I have sent a copy of your post to Tiff Needell .. together with a strongly worded note. Let us have no more of this .. please use the current UK standards. Pitifully low as they are. :lol: :lol: :lol: Dave BC |
| Dean W:
Good thinking with those pin clamps, Rod. That welding looks very precise, to me! ; ) Gee, that casting looks as good on the inside as it does on the outside, too. Dean |
| Rob.Wilson:
Cheers Dean ,,,,,,,,, The casting is surprisingly good , only one spot witch has some porosity :D This post may have way to many photos ::) ,,,,,,, I machined up the casting over the past two nights ,this is how i did it . The casting had to be marked out to give me some reference points to work from and to make sure the casting would machine up correctly . the casting was set up on the surface plate using a couple of small screw jacks and an angle plate so i could mark a datum line through the center of the casting . once i was happy with the position of the casting the centre line datum was marked , this will be used to set the casting up on the mill Next the position of the crank centre was marked out and all other parts to be machined as a guide so that i dont machine off something that i should not :bang: That done time for some machining :ddb: , I wanted to mill all parts without having to reposition the casting once bolted to the mill , so i decided to use the Aceira F3 HZ/V mill , I just had enough travel on the mill , machining the casting this way i would not have any alignment issues. The casting was set up on the mill using the datum line Had to use my small doodad , that lets me have a tee slot were i need it as i was very limited to were on the mill the casting could go. With it all set up the cylinder end was machined up next the bearings , the table on the mill tilted to 18 degs next picking up the datum the inside of the bearing supports were machined that done i could machine them to the correct thickness then the tops were machined Then off with the vertical head so i could machine the bosses for the timing gear and stuff with the tooling in the HZ head , One of the previous operations machined off the crank centre , so a temp datum was fitted. with that located it was a case of across a bit down a bit using the dials to locate the centre fro the timing gear shaft After drilling the hole was bored to size using a very small boring head Then the rest of the bosses were machined up Job done ,,,,,,,,, well still need to do the bolt down pads Cheers Rob |
| John Stevenson:
Well I suppose that will have to do....... John S. |
| Rob.Wilson:
--- Quote from: John Stevenson on July 01, 2010, 03:40:50 PM ---Well I suppose that will have to do....... John S. --- End quote --- But are you happy with the amount of swarf in the shots ,John :D Rob |
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