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US4899594A Expired / Lapsed US ⏱️ 0.0 years remaining

Device for measuring the cutting forces on machine tools

Assignee: Kistler Instrumente AG
•
Filing: 1988-12-22
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Granted: 1990-02-13
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Expires: 2008-12-22
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Abstract

Abstract A device for measuring at least one force component during cutting operations on workpieces with machine tools, including a dynamometer with measuring elements, integrated in a base module of a modular toolholder so that it is directly engaged with the cutting tool. The base module may be combined with various clamping and mounting modules to allow adaptation to standardized clamping systems of different machine tools, and to standard tools. The integration of the dynamometer in the toolholder and the direct engagement between cutting tool and dynamometer gives a compact unit with only small or no force shunts, making possible precision measurements. The device is therefore suitable for, among other duties, calibrating existing monitoring sensors of machine tools and for comparative functional tests on different machine tools. Measuring and evaluation electronics may be integrated in the device, wholly or in part. Furthermore holes may be provided in the device for supplying coolant, and dynamometer connecting cables.

Inventors

  • 👤 Peter Wolfer
  • 👤 Hans P. Pfeifer
  • 👤 Gunter Spur
  • 👤 Jan C. Siebert
  • 👤 Klaus-Jurgen Benzinger

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 22:57
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0952; B23Q17/0966

Claims Analysis

Total Claims: 15
Claim 1
Independent Claim 81 words
Device for measuring at least one force component in cutting operations on machine tools comprising: a modular-assembled toolholder connecting a cutting tool to a machine; a base module of said toolholder includes a dynamometer integrated therein; a clamping module of said toolholder for clamping a cutting tool at a first interface with said base module against said dynamometer; and a mounting module of said toolholder joined at a second interface with said base module for mounting said toolholder to said machine.
Claim 2
Dependent Claim 81 words
Device for measuring at least one force component in cutting operations on machine tools comprising: a modular-assembled toolholder connecting a cutting tool to a machine; a base module of said toolholder includes a dynamometer integrated therein; a clamping module of said toolholder for clamping a cutting tool at a first interface with said base module against said dynamometer; and a mounting module of said toolholder joined at a second interface with said base module for mounting said toolholder to said machine.
Claim 3
Dependent Claim 17 words
Device according to claim 1, wherein said dynamometer includes measuring elements for sensing three orthogonal forces components.
Claim 4
Dependent Claim 16 words
Device according to claim 1, wherein said dynamometer includes measuring elements for sensing two forces components.
Claim 5
Dependent Claim 15 words
Device according to claim 1, wherein said toolholder includes a coolant supply system integrated therein.
Claim 6
Dependent Claim 20 words
Device according to claim 4, including means for sealing said dynamometer against ingress of coolant from said coolant supply system.
Claim 7
Dependent Claim 33 words
Device according to claim 1, wherein said base, clamping and mounting modules are configured such that said cutting tools cutting plane passes through a centerline of a mounting element of said mounting module.
Claim 8
Dependent Claim 23 words
Device according to claim 6, wherein said mounting element includes a straight shank to be received on a turret carrier on said machine.
Claim 9
Dependent Claim 22 words
Device according to claim 6, wherein said mounting elements includes a clamp to be received on a turret carrier on said machine.
Claim 10
Dependent Claim 19 words
Device according to claim 1, wherein measuring and evaluation electronics are at least partially integrated into said base module.
Claim 11
Dependent Claim 17 words
Device according to claim 1, including cables connected to said dynamometer and integrated in said base module.
Claim 12
Dependent Claim 19 words
Device according to claim 1, wherein said toolholder has standard dimensions compared to other toolholders for said machine .
Claim 13
Dependent Claim 12 words
Device according to claim 1, wherein said dynamometer includes piezoelectric measuring elements.
Claim 14
Dependent Claim 23 words
Device according to claim 1, wherein said mounting module includes a straight shank to be received on a turret carrier on said machine.
Claim 15
Dependent Claim 22 words
Device according to claim 1, wherein said mounting module includes a clamp to be received on a turret carrier on said machine.

References Cited (Backward Citations)

US3640130A Cited
DE3440670A1 Cited
US4671147A Cited
FR2606147A1 Cited
US4757307A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-02-12 1993-08-14 1994-02-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-02-12 1997-08-14 1998-02-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-02-12 2001-08-14 2002-02-13 $7700.00 Window Closed / Lapsed

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