4.13.1 Calculation Of The Cutting Forces Or Necessary Holding Force When Milling; Cooling; 4.14.1 Coolant; For Machines With Coolant Device - Optimum OPTidrill DH 40CT Betriebsanleitung

4.13.1 Calculation of the Cutting Forces or Necessary Holding Force when Milling

The cutting force Fc arising between the tool and workpiece when milling can be calculated
using the Viktor/Kienzle formula:
In this formula, there are 5 factors which are completely unknown without more detailed knowl-
edge. However, these factors can be determined using tables.
The specific cutting force kc1.1 and the chip thickness exponent mc are dependent on the
material used. Both parameters are present in tabular reference books and must be investi-
gated for the corresponding material.
Furthermore, for the calculation of the cutting force Fc according to the Kienzle equation, the
chip width b, the chip thickness h, and the correction factor K are needed.
We recommend using a book of machining technology reference tables.
In such handbooks you will find all the necessary and additional information. Such manuals
should bridge the gap between the predominantly theory-oriented textbooks and reference and
table books mostly written with the few theoretical principles in practice.
4.14

Cooling

The friction generated during rotation can cause the edge of the tool to become very hot.
The tool should be cooled during the drilling process. Cooling the tool with a suitable cooling
lubricant ensures better working results and a longer edge life of the cutting tool.
This is best realised by a separate cooling equipment. If there is no cooling equipment included
in the delivery volume, you can cool by means of a spray gun or a washing bottle.
CAUTION!
Danger of injury due to brushes getting caught or pulled in.
Use a spray gun or a washing bottle for cooling.

4.14.1 Coolant

INFORMATION
Use a water-soluble and non-pollutant emulsion as a cooling agent.This can be acquired from
authorised distributors.
Make sure that the cooling agent is being collected.
Respect the environment when disposing of lubricants and coolants.
Follow the manufacturer's disposal instructions.
4.15

For machines with coolant device


Adjust the flow using the shut-off and dosing tap.
ATTENTION!
Destruction of the pump due dry running.
The pump is lubricated by the cooling agent. Do not operate the pump without coolant.
Clean the collection container of the chip filter in regular intervals.
WARNING!
Discharge and overflow of cooling lubricants and lubricants. Ensure that cooling
lubricants are not discharged onto the floor. Any cooling lubricants that run onto the
floor must be removed immediately.
Operation
Version 1.0.1 - 2021-07-06 Translation of original instruction
DH 40CT EN
81