Tool and method for measuring a tool force
A measurement tool and tool technology, applied in the direction of measurement devices, manufacturing tools, measurement/indication equipment, etc., can solve problems such as errors, adverse effects of dynamic characteristics of measurement units, etc.
Pending Publication Date: 2021-06-01
KISTLER HLDG AG
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Problems solved by technology
The disadvantage here is that, due to the geometry of the machine slide, errors can occur in the force measurement, and the mass of the machine slide can also have an adverse effect on the dynamic behavior of the measuring cell
Method used
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Embodiment Construction
[0075] Figures 1 to 10 Various embodiments of tool 10 with force sensors 30 are shown.
[0076] The force sensor 30 is preferably a piezoelectric force sensor. A piezoelectric force sensor has a piezoelectric element, electrodes, electrical conductors and contact surfaces. The force sensor 30 measures the tool force acting on the contact surface. The contact surface is made of a mechanically stable material and is cylindrical or hollow cylindrical. Piezoelectric elements are cylindrical or hollow cylindrical and are made of piezoelectric materials such as quartz (SiO 2 single crystal), calcium-gallite-germanate (Ca 3 Ga 2 Ge 4 o 14 or CGG), lanthanum gallium silicate (La 3 Ga 5 SiO 14 or LGS), tourmaline, gallium orthophosphate, piezoelectric ceramics, etc. The piezoelectric element is oriented such that it has a high sensitivity to the tool force to be received. The piezoelectric element is preferably oriented such that an electric polarization charge is also gen...
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Abstract
According to the invention, a tool (10) comprises a tool shaft (11), which is received in a tool receptacle (21) of a tool holder (20); the tool (10) also comprises a force sensor (30), which is arranged in a recess (12) on the tool shaft (11); and, during operation of the tool (10), the force sensor (30) measures a tool force acting from the tool shaft (11) on the tool holder (20). The invention also relates to a method for measuring a tool force, with a tool (10), which comprises a tool shaft (11) which is received in a tool receptacle (21) of a tool holder (20); the tool (10) also comprises a force sensor (30); the method comprises the following steps: arranging a force sensor (30) between the tool shaft (11) of the tool (10) and the tool receptacle (21) of the tool holder (20); and clamping the force sensor (30) with the aid of a clamping device of the tool receptacle (21); during operation of the tool (10), the force sensor (30) measures the tool force acting from the tool shaft (11) on the tool holder (20).
Description
technical field [0001] The invention relates to a tool with a tool shaft that is received in a tool receptacle of a tool holder. The invention also relates to a force sensor for measuring tool force. Furthermore, the invention relates to a method for measuring tool forces with such a tool and such a force sensor. Background technique [0002] When using machine tools to manufacture workpieces, it is often necessary to measure the forces acting on a tool arranged in a tool holder of the machine tool. This so-called instrumental force is often multidimensional. For example, in a lathe, not only the cutting force exerted on the cutting tool by the workpiece but also the feed force act on the cutting tool. [0003] This tool force can be measured using a dynamometer. A disadvantage, however, is their large size, so that the dynamometer is often disturbed in the machine room and cannot be installed anywhere on the machine tool. In addition, dynamometers are relatively expens...
Claims
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IPC IPC(8): G01L5/167B23Q17/09G01L5/00
CPCG01L5/0076G01L5/167B23Q17/0966B23Q2717/003
Inventor T·芬佩尔G·凯策尔丹尼斯·科勒
Owner KISTLER HLDG AG