I worked most of career at a heat exchanger manufacturer and I must have purchased over 1000 forging to be machined into nozzles. The best were made using. Forged ring roller that provided near net shapes I was director of materials
James, You used a DTI to centre the bored hole but when you took the first (facing) cut the bore was way off centre... did you decide to use the outer perimeter instead as the centreing reference ? 🤔
When first mounted you used a DI to indicate the pre prepared bore. But when you started machining the bore was way off centered. Mistake or did you just decide you could do better for the outside by eye? The DI step seems, to me, superfluous. The result looks to be ok. Be nice to see it as a completed item and a reason for it to have to be forged. Maybe where it's used would complete the journey from, as a previous commenter said, boreing to groovy baby.
It's the nature of the boring bar. The first operation yields a hole that is the minimum clearance for the bar, + the expected positioning allowance. All specified in the setup sheet written by the programmer.
The middle hole was drilled to enter the boring tool during inner machining. The reason why the hole is pre-processed is to shorten the processing time by working on another machine.😀
At first, it was boring, but you turned me around; it's groovy, now.
You're a chip off the old block aren't you!
I like the cut of your jib, sir.
Looks like one half of a two piece ball valve. Nice and instructive video
thanks for sharing!
It's always nice to see a plain lump of steel transformed into a thing of beauty! :)
This is how modern civilizations are built.
I just wish I could have seen this valve in action after it was built.
Nice finish James! That was a serious amount of swarf to make there.
I worked most of career at a heat exchanger manufacturer and I must have purchased over 1000 forging to be machined into nozzles. The best were made using. Forged ring roller that provided near net shapes
I was director of materials
wonderful, cheers from Florida, USA...Paul
I'd like to thank you In S.Korea 😀
We gotta get you some new lifting straps! Those things are cut to heck!
James has been warned more than enough. Judgement day will come.
@bigbattenberg Shame. The amount of high dollar products that come off that VTL, you would think they would get this man some new sheathed straps.
Thank you. I need to engrave your words on a new lifting strap!
Oh, I've already been judged...
There's a valve body in that forging somewhere, it just takes a lot of digging to find it!
Nice work!
Good job, as always!
This product is called the valve body of a power plant, but I've never seen it installed. Thank you bruce 😃
Cool. What a weird looking valve, I wondered what it was for? 👍🇬🇧
Thanks for sharing 👍
Nice big work.
The chips at the end spoiled the surface a little through. 👍
Excellent
Good.
Always fascinating to watch. Are there also Mazak Integrex machines (like Peter Stanton's) or similar in your shop?
Unfortunately, I don't have one. But if I have a chance, I want to experience those machines.
Nice work! How do you set your tools? Do u have a probe or do a touch off?
Set using a tool setter or by touching the surface. This depends on the situation.
Trabalhei em uma máquina dessa,placa de 3 000 mm,
Sinto saudades 😢
James, You used a DTI to centre the bored hole but when you took the first (facing) cut the bore was way off centre... did you decide to use the outer perimeter instead as the centreing reference ? 🤔
Looks like it. Whoever bored that hole must've bored it so far off centre that there wasn't enough material left on one side lol
The product was not well centered. So I changed the processing plan. As you know, the hole in the center is a hole for entering the boring tool.😀
Any chance of posting avg starting and finished weights to see how much metal is removed?
What's your typical tolerances held on parts you make on a VTL?
Very precise products require precision from +0 to +0.03mm and general tolerance is 0.1mm. 😀
When first mounted you used a DI to indicate the pre prepared bore. But when you started machining the bore was way off centered. Mistake or did you just decide you could do better for the outside by eye? The DI step seems, to me, superfluous.
The result looks to be ok.
Be nice to see it as a completed item and a reason for it to have to be forged.
Maybe where it's used would complete the journey from, as a previous commenter said, boreing to groovy baby.
So much chips built up b4 it even started 😢my ocd screams to go clean it out for u lol😂
Do you get a lot of deflection when you use the long tools?
It's a little bit, but it's not too much.
How do you square something like this
Do you measure before finishing cut? Just wondering
Of course, most dimensional measurements are possible except for curved shapes, and they are always measured.
Is it a requirement that stock has a central bore for chip evacuation? Or is that done simply to avoid throwing coolant everywhere?
It's the nature of the boring bar. The first operation yields a hole that is the minimum clearance for the bar, + the expected positioning allowance. All specified in the setup sheet written by the programmer.
The middle hole was drilled to enter the boring tool during inner machining. The reason why the hole is pre-processed is to shorten the processing time by working on another machine.😀
@@jamespark_85machiningtv chip evacuation on a horizontal lathe makes enough difference in cycle time to make up for having to do the second setup?
I ran a cnc vertical lathe for a little while. Scared the crap out of me. No thanks. I much prefer a mill any day.
Doesn’t look done to me