W3: Tool Change; Introduction; Tool Magazines And Tool Change Equipments; Tool Change Times - Siemens SINUMERIK 840D sl Function Manual

W3: Tool change

17.1

Introduction

CNC-controlled machine tools are equipped with tool magazines and automatic tool change
facility for the complete machining of workpieces.
The procedure for changing tools comprises three steps:
1. Movement of the tool carrier from the machining position to the tool change position
2. Tool change
3. Movement of the tool carrier from the tool change position to the new machining position.
The following is required for tool change:
● short idle times
● Time-saving searches, provision and return of tool during the machining time.
● Simple programming of the tool change cycle
● Automatic flow of the required axis and gripper movements
● Easy fault recovery
17.2

Tool magazines and tool change equipments

Tool magazines and tool changing equipment are selected according to the machine type:
Machine type
Turning machines Turret
Milling machines
As the changing operation interrupts the machining, idle times times must be minimized.
17.3

Tool change times

Tool change times depend strongly on the design layout of the machine tool.
Typical tool change times
0.1 to 0.2 s
0.3 to 2 s
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Tool magazine
(disk, flat, inclined)
Magazines
(chain, disk-type, rotary-plate, cartridge)
for advancing a turret
for tool change with gripper for a prepared tool
17
Tool change equipment
No special tool change equipment.
The tool is changed by turning the
turret
Gripper/dual gripper as tool change
equipment.
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