New Haas Bridge Mills look kind of interesting - Page 3
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  1. #41
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    I'm with Milland on this.

    One trend over the last say 3 decades is that CNC machining has become commoditized - so there are ever more such machines sitting ever more idle in funky corners of the economy. (Sort of like how computers were once so expensive they were never allowed to be idle, now people have that much compute power in their phones, with that computing mostly sitting idle.)

    So a machine that's only going to make small runs, of parts that are often designed on short notice, said machine sitting idle an amount of time that no job shop or factory would tolerate - are becoming ever more common. And will continue to.

    Those machines will often have configurations that don't make sense to a factory or job shop.

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  3. #42
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    I suppose if you're making Jet-Ski hull molds you only have to make a few a year.

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    haas made some big bridge mills and vtls 15-20 yrs ago not sure if they ever made it out of their own shop though. seems like recently they are resurrecting a lot of older projects and bringing them back. could be there is a line of these in their shop that need to get replaced and makes sense to take another stab at the market place....

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    Quote Originally Posted by Milland View Post
    Haas F1 chassis are made from billet carbon fiber?? Where do they mine the ore for that, in Graphitelandia?
    You have to lay it over something. Maybe this machine is designed to cut balsa wood ?

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  8. #45
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    Quote Originally Posted by EmanuelGoldstein View Post
    You have to lay it over something. Maybe this machine is designed to cut balsa wood ?
    Waiting for someone to chime in..."that Haas could hold tenths all day in balsa wood"

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  10. #46
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    Quote Originally Posted by metalmadness View Post
    Waiting for someone to chime in..."that Haas could hold tenths all day in balsa wood"
    I wouldn't even bet money on that

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    Quote Originally Posted by TeachMePlease View Post
    I wouldn't even bet money on that
    I meant "tenths" of an inch, of course

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    No, "It can hold tents all day!" It's that you can setup a tent on the table...

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  15. #49
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    Quote Originally Posted by mhajicek View Post
    No, "It can hold tents all day!" It's that you can setup a tent on the table...
    If a bear machines in the woods, can it meet tolerances?

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  17. #50
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    Quote Originally Posted by Milland View Post
    If a bear machines in the woods, can it meet tolerances?
    "Look around you… can you fashion some sort of rudimentary lathe?"

    -Galaxy Quest

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  19. #51
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    Quote Originally Posted by mhajicek View Post
    "Look around you… can you fashion some sort of rudimentary lathe?"

    -Galaxy Quest
    "By Grabthar's Hammer, you shall be passed by QC!"


    [Alternative: When one has Grabthar's Hammer, does all the universe look like a Fatu-Krey nail?]

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  21. #52
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    Well alot of bellyhammering and hogwash mixed with boulderdash and horking of old ideas in this thread.

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    Quote Originally Posted by Speedie View Post
    Well alot of bellyhammering and hogwash mixed with boulderdash and horking of old ideas in this thread.
    So I assume you'll be first in line to buy one then?

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    Quote Originally Posted by Speedie View Post
    Well alot of bellyhammering and hogwash mixed with boulderdash and horking of old ideas in this thread.
    As long as there's no poppycock about malarkey.

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    Quote Originally Posted by LOTT View Post
    What do you all think of this bad boy? I had been saving up for an Integrex, but now...

    https://youtu.be/CSLu9SLwH6g

    By the way, how do you get videos to show up in the chat window?
    Murderously slow chip to chip tool change time.

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    No I only have $600 in my bank account

    Quote Originally Posted by gregormarwick View Post
    So I assume you'll be first in line to buy one then?

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    Quote Originally Posted by Speedie View Post
    No I only have $600 in my bank account
    Hold on to it, you might be able to pick one up during the fire sale.

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    Quote Originally Posted by gregormarwick View Post
    He's talking extremes, but he's right.

    It doesn't matter if you're doing 90% material removal on a 10 tonne forging, or pocketing a small part in a vice with a 3mm endmill.

    As long as you are not constrained by rpms and axis feedrates, and are anywhere close to optimal cutting data, you WILL be pulling a lot more power cutting aluminium than (for example) steel.

    Our Hurco that I mentioned earlier ITT has a 55KW (continuous, 60KW peak) spindle, and even though that machine cuts very little aluminium, I can state with confidence that 90%+ of it's "in the red" spindle time has been in aluminium.
    I know it's off-topic, but....really? I had no idea, but now that you made me think about it, it makes sense. High feed milling 17-4 and I'm not going much past 60% spindle load, but ripping a 2" Ingersoll Hi-Pos alu and I'm easily into the red. Is that because aluminum wants to pull, or deform, rather than shear?

  28. #59
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    Quote Originally Posted by JBethell View Post
    I know it's off-topic, but....really? I had no idea, but now that you made me think about it, it makes sense. High feed milling 17-4 and I'm not going much past 60% spindle load, but ripping a 2" Ingersoll Hi-Pos alu and I'm easily into the red. Is that because aluminum wants to pull, or deform, rather than shear?
    To my mind, there are two things at play.

    First, the ratio of specific cutting force to chip cross section.

    For the sake of argument*, say that aluminium has one quarter the specific cutting force of 17-4, but your cutting data and resultant chip cross section is 8x higher in alu, so there is 2x the developed torque at the cutter when cutting alu. all else being equal.

    Second, spindle speed and the torque/power curve of the spindle. At constant torque, more rpms = more KW/HP. And to compound that effect, most machines are well outside of their constant torque range when machining aluminium.

    *I don't know the real values off the top of my head but they can be found in the literature of most of the cutting tool manufacturers.

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  30. #60
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    Quote Originally Posted by gregormarwick View Post
    To my mind, there are two things at play.

    First, the ratio of specific cutting force to chip cross section.

    For the sake of argument*, say that aluminium has one quarter the specific cutting force of 17-4, but your cutting data and resultant chip cross section is 8x higher in alu, so there is 2x the developed torque at the cutter when cutting alu. all else being equal.

    Second, spindle speed and the torque/power curve of the spindle. At constant torque, more rpms = more KW/HP. And to compound that effect, most machines are well outside of their constant torque range when machining aluminium.

    *I don't know the real values off the top of my head but they can be found in the literature of most of the cutting tool manufacturers.
    only outside of their constant torque range because most programmers dont have a clue on how to use their spindle torque curve to their advantage...


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