Centering device for the guided transfer of bars from a feeder to a lathe

A centering device for guided transfer of bars from a feeder to a lathe, that is interposable between the feeder and the lathe in alignment with a bar guide of the feeder and with a mandrel of the lathe, the device comprising:

• a supporting structure which is constantly aligned with an opening of the lathe from which a bar enters therein, with a bar guide of the feeder, and with a mandrel of the lathe;
• a bush element for fixing to a fixing seat which is rigidly coupled to said supporting structure;
• a substantially tubular body, which is rigidly coupled to said bush element, coaxial thereto and is provided with a housing seat, fixed anchoring elements supported by said tubular body;
• elastic means;
• elastic positioning elements acting between said bush element and said tubular body;
• and a ring accommodated in said seat and comprising oscillating elements, which are each pivoted to a respective one of said fixed anchoring elements with a first end thereof and are retained in mutual contact by said elastic means so as to delimit a through opening whose diameter is substantially as long as and in any case not smaller than a diameter of a bar to be transferred, said ring and said fixed anchoring elements being axially movable within said housing seat, by forcing at least one of said elastic positioning elements for positional movement of said ring and anchoring elements from a bottom of said housing seat toward the lathe, and wherein said oscillating elements are substantially shaped like tiles that are pivoted at the respective first end which is opposite with respect to a second end which is provided with a protrusion, a terminal region of the oscillating elements located beyond said protrusion providing a shaped opening which is substantially formed by circular sectors delimited between respective linear connecting portions.

A centering device for guided transfer of bars from a feeder to a late, that is interposable between the feeder and the lathe in alignment with a bar guide of the feeder and with a mandrel of the lathe, the device comprising:

• a supporting structure which is constantly aligned with an opening of the lathe from which a bar enters therein, with a bar guide of the feeder, and with a mandrel of the lathe;
• a bush element for fixing to a fixing seat which is rigidly coupled to said supporting structure;
• a substantially tubular body, which is rigidly coupled to said bush element, coaxial thereto and is provided with a housing seat, fixed anchoring elements supported by said tubular body;
• elastic means;
• elastic positioning elements acting between said bush element and said tubular body;
• and a ring accommodated in said seat and comprising oscillating elements, which are each pivoted to a respective one of said fixed anchoring elements with a first end thereof and are retained in mutual contact by said elastic means so as to delimit a through opening whose diameter is substantially as long as and in any case not smaller than a diameter of a bar to be transferred, said ring and said fixed anchoring elements being axially movable within said housing seat, by forcing at least one of said elastic positioning elements for positional movement of said ring and anchoring elements from a bottom of said housing seat toward the lathe, wherein said oscillating elements are substantially shaped like tiles that are pivoted at the respective first end which is opposite with respect to a second end which is provided with a protrusion, a terminal region of the oscillating elements located beyond said protrusion providing a, shaped opening which is substantially formed by circular sectors delimited between respective linear connecting portions, and wherein said elastic means is constituted by an elastic annular body, which is mounted on said ring comprising said oscillating elements in a respective groove provided on an outer side of the ring proximate to the terminal end thereof.