Stationary dynamometer for measuring cutting forces

Thanks to the high natural frequency of the MicroDyn, the TU Dortmund can measure highly dynamic forces at spindle speeds of up to 160,000 rpm

Piezoelectric measurement technology is also the basis for our stationary dynamometers. Their design makes them especially suitable for measuring the cutting forces that act on the workpiece in applications where workpieces are mounted directly on machining tables. The benefit: these dynamometers can be used universally on machines with a wide variety of spindle interfaces. They have proven to be highly versatile tools, especially for use in research and development.

Standard dynamometers

Our stationary dynamometers for universal use correspond to 3-component measuring platforms based on four piezoelectric sensors. They can handle cutting force measurements of up to 60 kN, and Kistler offers cover plates with dimensions of up to 400x600 mm; the plate size will vary depending on the measuring range. Dynamometers 9257B, 9255C, 9253B22/23 and 9366C are particularly suitable for milling and grinding operations. On the other hand, the strengths of the 4-component dynamometer (9272) come into play for integrated measurement of moments during drilling operations.

Temperature-compensated dynamometers

Piezoelectric measurement technology is very well suited to meet the demanding requirements that highly dynamic machining sets in terms of the sensitivity and dynamics of the signals to be captured. The thermal energy given off during the cutting process usually causes undesirable signal drift. This effect is particularly noticeable in applications with very high spindle speeds and material removal rates. A stationary dynamometer with horizontal preload largely eliminates the negative influences of heat generation, so drift is minimized. This allows accurate measurements of processes involving high levels of heat generation and/or thermal differences.

Kistler offers temperature-compensated dynamometers for applications ranging from micromachining through to heavy machining. Thanks to their optimized rigidity and mass, these dynamometers attain exceptionally high natural frequencies. All the multicomponent dynamometers are suitable for milling, drilling and grinding operations, among many others. For the 9119AA2 and 9129AA, Kistler also offers special adapters for tool-side force measurements during turning operations.

Modular systems for lathes

Multicomponent dynamometer MidiDyn with adapters , Type 9129AA

Our temperature-compensated stationary dynamometers (9119AA1/2 and 9129AA) can also be used to measure cutting forces or to analyze and optimize cutting processes in turning operations.

Kistler offers you an extensive choice of standard commercial adapters for every dynamometer, covering all commonly used machine-side and tool-side interfaces (including HSK, VDI, and others).

The appropriate machine adapters make it easy to position the dynamometers directly on the turret head. Then, the tool is placed on the dynamometer with a suitable tool adapter.

Stationary dynamometers are highly versatile

Machining processes can only achieve consistently high product quality combined with cost-efficient operation if there is optimal coordination of machine tools, clamping devices, coolants and materials.

Stationary dynamometers from Kistler are deployed in many types of machining to deliver precise, highly dynamic measurements of cutting forces. The data obtained provides the basis for optimizing tools and machining processes: