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Optimized vibration absorber

  • US 9,533,357 B2
  • Filed: 06/30/2014
  • Issued: 01/03/2017
  • Est. Priority Date: 06/30/2014
  • Status: Active Grant
First Claim
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1. A tuned or tunable boring tool comprising:

  • a boring bar having a distal portion configured to support a tool, a proximal portion configured for attachment to a support structure of a metalworking machine, and a tubular body extending between the proximal portion and the distal portion, having an elongated cavity therein;

    a dynamic vibration absorber inserted within the elongated cavity of the boring bar, the dynamic vibration absorber comprising;

    a mass that vibrates in conjunction with vibration of the boring bar, the mass having a proximal end, positioned adjacent to the proximal portion of the boring bar, and a distal end, positioned adjacent to the distal portion of the boring bar;

    at least one proximal support, which is resilient, positioned adjacent to and supporting the proximal end of the mass, wherein the at least one proximal support has a stiffness; and

    at least one distal support, which is resilient, positioned adjacent to and supporting the distal end of the mass, wherein the at least one distal support has a stiffness,wherein the at least one proximal support and at least one distal support have different stiffnesses; and

    wherein the at least one proximal support comprises a first material, the at least one distal support comprises a second material, and wherein the stiffness of the second material is greater than the stiffness of the first material.

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