Information On CNC Milling Machine

[george_kj]

Hi,

I am a Gradute student and am preparing a report on cnc milling machines.

I wanted to study about the mechanisms of the 3 , 4, 5 ,6 axes milling machines.

i have never seen these machines so am finding it difficult to draw the mechanisms.

can anyone help me.


hope i get a reply.
Regards.

[bobparks]

I believe that Cincinnati Milacron used to build a 4 axis machine similar to a horizontal boring mill in layout. Instead of a horizontal spindle head mounted to ride up and down the column, it had a spindle head that tipped from slightly up, (maybe 10º), to pointing straight down and could be set to any degree between. The rotation of the head was around the 'X' axis and thus could vary between above the 'Z' axis to pointing straight down the '-Y' axis. The head rotation was the 'A' axis.

The movement of the table in the 'X' axis was perpendicular to the 'Y' and 'Z' axii. The table also moved toward and away from the head and vertical column making the 'Z' axis.

With such a machine, an additional axis could be easily added with a rotary table, a sub plate, or a pallet that could be rotated around the 'Y' or vertical axis. Rotation around the 'Y' axis would be the 'B' axis.

Bob Parks

[pean81]

Hi!

I am not sure what mechanism you are looking for. So I send you a picture that explains the ISO-standard of the axis in different types of machines. Hope that would help a little bit.

[doanwannapickle]

This should help.
http://www.rainnea.com/cnc_toolkit.htm
http://www.mmsonline.com/

[george_kj]

Thank You for your replies.

I was looking at a kind of link and joint model or a kinematic model or a mathematical model...which ever name is appropriate...with its movements shown.....

Thanks pean...Its something like that......do u have the data related to that......

Bob..thanks for your reply...do u have a figure and data for that....

I am going through the links.

[george_kj]

Hi,

Can any one atleast tell me how a 3 , 4 , 5 and 6 axis machine works.What are the process involved.

Can anyone help me in finding them?

Regards.

[307startup]

3 axis: http://www.haascnc.com/VMC_MODEL_MIN...p#VMCTreeModel

4 axis, the above plus: http://www.haascnc.com/Rotary_Main_d...asp#RotaryTree

5 axis: http://www.haascnc.com/5AXIS_Model_T...5axisTreeModel

6 axis:
http://www.boko.com/WF%20Milling%20Machine.htm

c'mon man, do a websearch, I found those in like 3 minutes!

[Jarwalcot]

Perhaps this will help you get a better understanding... Good luck on your assignment.

[george_kj]

Hi,

In my project i have to take a 3 , 4 , 5 and 6 axis CNC Milling machine and explain the whole mechanism of the machine...Like what generates the motion and how the axis moves etc.....in short the function analysis of the particular machine....They are found in the company manuals.No machine can be designed with out their mechanisms.

Here i am attaching few example's of what i need..I need similar diagrams for the CNC milling machine and its literature.

First is a Dump truck and its mechanism shown..Any similar diagram for the 3 , 4 ,5 and 6 axes machines.

And similarly is an example for a industrial Robot and its mechanism shown using rectangular sperical and cylindical configuration.

A suspension system is shown with its mechanism.

Hope i am clear here and someone can help me out now.

Regards,
GEORGE.

[307startup]

Well...there are a lot of components...generally in a mill you have a base casting, which is what the column and the other components all assemble to. Here is a list of the following MECHANICAL components in a bed mill:

BASE/Bed casting(horizontal structure...the following components all attach or integrate to this structure)
WAYS(support the travels):dovetail, box, linear or round(usually two per axis of movement, sometimes more)
SCREW(supplies the means for travel):acme, rolled/ground ballscrews ALSO rack&pinion, belt/chain drive, worm gear...(there will be at least one of these per axis)
SCREW MOUNTS(self-evident): single or dual-end, with bearings (single, double, AC bearings, deep-groove ball bearings, what have you...)
SERVOS/STEPPERS(provides the motive force):attached to the screw, rotate to provide linear travel, at least one per axis
TABLE(the surface that the workpieces are mounted to):way guides or ways can be assembled onto or part of the table, as is the traveling nut or guide for the screw(rotary motion of stepper/servo turns the screw imparting a travel in accordance with pitch of screw while the nut or guide travels along the surface of the screw, in turn advancing the table)
COLUMN(vertical structure):the head stock/spindle attaches to the column via ways, where the screw will attach to drive the head stock
HEAD STOCK(the base structure the spindle is part of/attached to):way guides are mounted to this, as well as the traveling nut or guide for screw
SPINDLE(provides the means for holding tooling to cut material)
SPINDLE MOTOR(can also be a servo...)