Chamfering tool with guide for eliminating vibrations
The invention relates to a cutting machine with a receiving area for a tube section and with a tool head ( 1 ) which can be rotated relative to the receiving area about a longitudinal axis (L), has at least one cutting tool ( 6 ) for machining a tube section end ( 40 ) of the tube section located in the receiving area, and has a support component ( 2 ), wherein the support component faces the receiving area and has an annular component ( 3 ) which rotates relative to the support component ( 2 ) about the longitudinal axis (L) and is designed to be randomly supported on a tube wall ( 42, 42 ) of the tube section end ( 40 ). The invention further relates to a corresponding method for reducing vibrations.
1. A cutting machine comprising:
a receiving area ( 60 ) for a metallic tube section whereby the cutting machine stands on a base during machining and the metallic tube is fixed in position in the receiving area and a tool head ( 1 ) which can be rotated relative to the receiving area about a longitudinal axis (L), and the tool head ( 1 ) has at least one cutting tool ( 6 ) relatively unmovable fixed to the tool head ( 1 ) for machining a metallic tube section end ( 40 ) of the tube section located in the receiving area, and has a support component ( 2 ) which faces in the direction of the receiving area
and has an annular component ( 3 ) which is rotatable about the longitudinal axis (L) relative to the support component ( 2 ) and an external diameter of the annular component ( 3 ) is dimensioned so that it is somewhat smaller than an internal diameter of the tube section, so that the support component ( 2 ) with the annular component ( 3 ) can be introduced without contact into the end of the tube section and is configured to be randomly supported on a metallic tube wall ( 42 ) of the metallic tube section end ( 40 ) and to interrupt regenerative chatter, wherein due to vibration of the tool head ( 1 ) the annular component ( 3 ) randomly abuts the inner wall of the tube section end ( 40 ),
and a support surface ( 20 ) of the annular component ( 3 ) has a profile comprising recesses ( 21 ) extending along the longitudinal axis (L) of the annular component ( 3 ).
2. A cutting machine according to claim 1 ,
characterised in that the support component is configured as a mandrel ( 2 ) and the annular component ( 3 ) is arranged so as to be rotatable externally on the mandrel ( 2 ), and an external diameter of the annular component ( 3 ) is smaller in cross-section perpendicular to the longitudinal axis (L) than an internal diameter of the tube section end ( 40 ).
3. A cutting machine according to claim 1 ,
characterized in that the profile has, in cross-section, recesses ( 21 ) in the direction away from the tube wall ( 41 , 42 ).
4. A cutting machine according to claim 1 ,
characterized in that the profile has a meandering shape in cross-section.
5. A cutting machine according to claim 1 ,
characterized in that the annular component ( 3 ) is mounted in a ball bearing ( 43 ) on the support component ( 2 ).
6. A cutting machine according to claim 1 ,
characterized in that the annular component ( 3 ) is replaceable by another annular component with another radius.
7. A method for reducing vibrations, in particular the regenerative chatter of a cutting machine according to claim 1 , wherein
whereby the cutting machine stands on a base during machining and a metallic tube is fixed in position in a receiving area the metallic tube section rotates relative to a tool head ( 1 ) with at least one cutting tool ( 6 ) relatively unmovable fixed to the tool head ( 1 ),
the tool head ( 1 ) cuts walls ( 41 , 42 ) of the metallic tube section end ( 40 ) by means of the at least one cutting tool ( 6 ),
the tool head ( 1 ) and the support component ( 2 ) are vibrationally excited during the cutting,
the tool head ( 1 ) is supported on one of the walls ( 41 , 42 ) of the metallic tube section end ( 40 ) by means of a support component ( 2 ) which has an annular component ( 3 ) rotating about a longitudinal axis (L), and an external diameter of the annular component ( 3 ) is dimensioned so that it is somewhat smaller than an internal diameter of the tube section, so that the support component ( 2 ) with the annular component ( 3 ) can be introduced without contact into the end of the tube section and the annular component ( 3 ) randomly contacts the inner wall of the metallic tube wherein due to vibration of the tool head ( 1 ) the annular component ( 3 ) randomly abuts the inner wall of the tube section end ( 40 ) and as a result vibrational excitement is interrupted.
8. A method according to claim 7 ,
characterized in that the annular component ( 3 ) has an angular velocity which decreases during contact with the wall ( 41 , 42 ),
whilst a rotational speed of the tool head ( 1 ) is not changed by the contact.