My Own Simple Note Chapter 5 : TOOL CHANGING AND TOOL REGISTER

Tool Changers:

2 types:

a) Manual
b) Automatic


a) Manual:


 it must:

1. accurately located in the spindle
2. located as accurately as possible in same location
3. same relationship to the work piece each time it is inserted in the spindle

b) Automatic

Tooling used with a tool changer is:

1. easy to center in the spindle
2. easy for tool changer to grab
3. Have some means of providing save disengagement of tool charger from the tool 

Automatic tool change consits 5 basics types:

a) Turrent Head

TURRENT HEAD

b) 180 Degree Rotation

Mechanisms

Advantages

- Simple.
-  The amount of motion involved is minimal.
-  Fast tool changes

Disadvantages

- The tools must be stored in a plane parallel to the spindle.

- Tendency of chips and coolant getting on the toolholders are high, therefore extra protection for the tools must be provided. 

c) Pivot Insertion

MECHANISMS 

Advantages

- The tools may be stored on the side of the machine away from
    potentially damaging chips.


Disadvantages

- Pivot insertion requires more motion and therefore results in a more time - consuming tool change.
.

d) Multi Axis

MECHANISMS:

Advantages

- The placement of the tool magazine on the back or side of the machine, in
   which maximum protection can be afforded to the tools

Disadvantages

- Has to employ the amount of tool handling and motion.

e) Spindle Direct

MECHANISMS:

Tool Length Register 

3 ways a machine's tool length compensation can adjust for a tool length  :

a) Difference of Gage tool trim

b) Plus Direction Trim

c) Minus Direction Trim