HYDROK
Use and limits of use
38
Order h49 7144.907-333
Pay attention to the following principles:
1. Principle
𝑭
𝒓𝒂𝒅
≥ 𝑭
𝒓𝒂𝒅 𝒆𝒓𝒇
AND
2. Principle
𝑭
𝒕
≤ 𝑭
𝒕 𝒎𝒂𝒙
AND
3. Principle
𝑭
𝒄
≤ 𝑭
𝒄 𝒎𝒂𝒙
[Relevant to turning and/or to axial drilling operations.]
AND
4. Principle
𝑭
𝒒
≤ 𝑭
𝒒 𝒎𝒂𝒙
[Relevant to a radial drilling operation directed at the center
and/or for the application of an equivalent load. If radial
forces and the resultant torques are not directed at the cen-
ter, due account of this can be taken by a quasi cutting force
outside the center.]
AND
5. Principle
𝑴
𝒒
≤ 𝑴
𝒒 𝒎𝒂𝒙
[Relevant to a radial drilling operation directed at the center
and/or for the application of an equivalent load. If radial
forces and the resultant torques are not directed at the cen-
ter, due account of this can be taken by a quasi cutting force
outside the center.]
With these principles, the assumption is that the clamping
head chuck is used for a turning operation, or for an axial or
radial drilling operation on the workpiece. There is no funda-
mental reason why the clamping head chuck cannot also be
used for other machining tasks such as bypass milling or
plunge-milling. In such cases, the owner must ensure that
the forces and torques that occur are comparable to the
equivalent permitted values for turning or drilling, to check
the reliability of the application.
5.2.5.1 Further to Principle 1:
𝑭
𝒓𝒂𝒅
≥ 𝑭
𝒓𝒂𝒅 𝒆𝒓𝒇
Determining the required clamping force
The following equations are used to determine the required
clamping force
𝐹
𝑟𝑎𝑑 𝑒𝑟𝑓
at rotational speed.
These equations apply to longitudinal turning and to face
turning operations. Drilling operations on the front end of
workpieces can also be calculated. Superimposed, simulta-
neous machining operations, for example by several tools or
turret heads can also be superimposed computationally. In
other words, the required radial clamping forces for individ-
ual machining operations need to be added together.
