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July 20, 2005
Environmentally Friendly
Alternative To Wet Machining
Seattle, WA, USA--(Jobwerx News)--Common practices in manufacturing rely
on coolants to keep machining processes, cutting tools and workpieces
thermally stable.
Machining process lubricant system minimizes friction and heat. With only
a few modifications, you can have your toolholding system ready for MQL
applications.
MQL – Minimum Quantity Lubrication
It is common practice in manufacturing to rely on coolants to keep the
machine, cutting tools and workpieces thermally stable. Coolant also washes
away chips to keep the workpiece and the machine work area clean. The
use of coolant involves significant costs for your manufacturing process.
These costs include buying, filtering, separating , and disposal of used
coolant.
MQL is an economical, environmentally friendly alternative to wet machining.
SCHUNK is ready with its TENDO toolholders to face the new challenges
of this cooling technique. With only a few modifications of existing holders,
you can have your toolholding system ready for MQL applications. Besides
significant changes in machines, this new technology also alters the requirements
of the cutting tool and toolholder.
What does MQL mean?
MQL stands for Minimum Quantity Lubrication. The goal is to use just enough
oil in an aerosol to act as a lubricant to minimize friction and heat.
The lubricant is injected or sprayed directly into the working area.
Advantages of MQL
- Elimination of high amounts of cooling lubricants
- Elimination of lubrication filters, conditioning systems
- Elimination of lubricant disposal costs
- No need to clean workpiece of coolant as produced chips remain essentially
dry
- Environmentally friendly
TENDO from SCHUNK & MQL
Upon request, SCHUNK toolholders can be modified based on the customer
request and clarification of technical details, to be used in MQL applications.
The following 2 areas require special attention:
The interface between the length adjustment screw and the tool shank
The coolant tube (HSK-A) and the coolant tube nut
Different parts and machining processes need different amounts of lubrication.
Milling, for example, is a surface operation and requires a minimum amount
of lubricity. Tapping for instance, calls for much more lubrication because
of the amount of surface contact between the workpiece and the tap.
Check with the manufacturer of your machine to determine if it is designed
for MQL applications. The software of the machine will have to be capable
of controlling the amount and duration of aerosol spray in the working
area. SCHUNK Toolholders can be modified accordingly when we know the
requirements of your machine.
Possible problems and solutions for MQL applications:
| Problem: |
Solution: |
| Chip removal |
. Introduction of vacuum system
. Process change to horizontal machining to allow gravity to remove
chips |
| Cooling of tool |
. Air-flow of the MQL delivers cooling to the entire
system |
| Thermal balance of the tool and workpiece |
. Change sequence of machining operations
. Keep incoming parts quarantined until temperature stabilizes
|
Available SCHUNK tooldholders that can be used in MQL applications:
Both holders with axial or radial adjustment.
For any further questions with regards to our toolholding program or possible
applications, please contact the toolholding department at 800-772-4865.
As well, please consult the new TENDO catalog with regards to further
information about the modification of SCHUNK TENDO toolholders.
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