Elliptical vibration cutting method and elliptical vibration cutting apparatus
First Claim
1. An apparatus for cutting a workpiece by vibratory action, said apparatus comprising a vibratory tool support body (2) having a cylindrical body portion (7,7.1,7.2) with a circular or substantially circular cross-section wherein said cylindrical body portion (7,7.1,7.2) comprises a circumferential, peripheral surface forming a cylinder that has said circular or substantially circular cross-section, at least two piezoelectric drive elements including a first and a second piezoelectric drive element (9, 10) secured to said cylindrical body portion (7,7.1,7.2) of said vibratory tool support body (2) with a 90°
- angular on-center circumferential spacing between said at least first and second piezoelectric drive elements (9, 10), a mounting surface (20) for securing a tool (6) to one end of said vibratory tool support body, and means (11) for energizing said at least first and second piezoelectric drive elements for vibrating said vibratory tool support body (2) by a vibration having an elliptical or circular locus, wherein said cylindrical body portion (7,7.1,7.2) of said vibratory tool support body (2) has a first diameter and a central longitudinal axis, said vibratory tool support body (2) further comprising at least one first body section (8 or 12) extending from said cylindrical body portion (7,7.1,7.2) coaxially relative to said central longitudinal axis, said at least one first body section having a second diameter smaller than said first diameter to provide a first stepped or necked-down configuration for amplifying said vibratory action, and at least one second body section (8A or 13) extending from said at least one first body section (8 or 12) coaxially relative to said central longitudinal axis, said at least one second body section (8A or 13) having a third diameter smaller than said second diameter to provide a second stepped or necked-down configuration, and wherein said mounting surface (20) is positioned at an outer end of one of said at least one second body section (8A), said apparatus further comprising at least two sensors (21) positioned circumferentially spaced around and secured to said at least one first body section (8) between said cylindrical body portion (7,7.1,7.2) and said at least one second body section (8A) to which said tool (6) is secured.
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Abstract
A workpiece is cut by a cutting tool that is attached to a cylindrical support body vibrated by at least two piezoelectric drive elements. The efficiency of the mechanical vibration is improved by attaching the piezoelectric drive elements to a cylindrical body portion (7,7.1,7.2) of the tool support body (2) and by providing the support body with a plurality of necked-down end sections. At least the cylindrical body portion (7,7.1,7.2) is a cylinder with a substantially circular cross-section or with a circular cross-section to provide a constant or a substantially constant bending rigidity of the cylindrical tool support body.
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Citations
12 Claims
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1. An apparatus for cutting a workpiece by vibratory action, said apparatus comprising a vibratory tool support body (2) having a cylindrical body portion (7,7.1,7.2) with a circular or substantially circular cross-section wherein said cylindrical body portion (7,7.1,7.2) comprises a circumferential, peripheral surface forming a cylinder that has said circular or substantially circular cross-section, at least two piezoelectric drive elements including a first and a second piezoelectric drive element (9, 10) secured to said cylindrical body portion (7,7.1,7.2) of said vibratory tool support body (2) with a 90°
- angular on-center circumferential spacing between said at least first and second piezoelectric drive elements (9, 10), a mounting surface (20) for securing a tool (6) to one end of said vibratory tool support body, and means (11) for energizing said at least first and second piezoelectric drive elements for vibrating said vibratory tool support body (2) by a vibration having an elliptical or circular locus, wherein said cylindrical body portion (7,7.1,7.2) of said vibratory tool support body (2) has a first diameter and a central longitudinal axis, said vibratory tool support body (2) further comprising at least one first body section (8 or 12) extending from said cylindrical body portion (7,7.1,7.2) coaxially relative to said central longitudinal axis, said at least one first body section having a second diameter smaller than said first diameter to provide a first stepped or necked-down configuration for amplifying said vibratory action, and at least one second body section (8A or 13) extending from said at least one first body section (8 or 12) coaxially relative to said central longitudinal axis, said at least one second body section (8A or 13) having a third diameter smaller than said second diameter to provide a second stepped or necked-down configuration, and wherein said mounting surface (20) is positioned at an outer end of one of said at least one second body section (8A), said apparatus further comprising at least two sensors (21) positioned circumferentially spaced around and secured to said at least one first body section (8) between said cylindrical body portion (7,7.1,7.2) and said at least one second body section (8A) to which said tool (6) is secured.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
Specification