Bar stock feed apparatus
OwnerVernon F. Blanchard, Bradley V. Blanchardinventors
Life of this patent
Estimating the term…
Abstract
Apparatus for feeding bar stock through the chuck of an automatic lathe. The apparatus is moved laterally by the turret to form shallow notches in the surface of the bar stock. The notches in the bar stock are gripped during longitudinal movement of the turret to advance the bar stock into the work area. A pair of cutting elements are adjustably located on one end of the apparatus to grip bar stock of various diameters. Guide blocks having interchangeable bushings to accommodate bar stock of different diameters are also disclosed for supporting the bar stock for rotation by the chuck.
Claims19
In a machine for operating on elongate cylindrical bar stock, the improvement comprising:
- a gripping device having a pair of adjustable, opposing cutting elements spaced apart a distance less than the outer diameter of the bar stock;
- means for moving the gripping device transversely to the longitudinal axis of the bar stock to engage the bar stock from its side, with the cutting elements forming notches therein;
- and
- means for moving the gripping device parallel to the longitudinal axis of the bar stock to pull the bar stock into a given area for performing work on the bar stock.
A feed device for positioning elongate bar stock for machining operations in a machine tool having a carriage and a crosslide, means for slideably positioning the carriage and the crosslide along axes which are respectively parallel and perpendicular to the axis of rotation of the bar stock, a multifaced turret, and means for rotatably securing the turret to the crosslide, said feed device comprising:
- an elongate member having a first end fixedly secured to said turret;
- first and second gripping means disposed in opposed spaced relationship on the second end of said elongate member operative to engaged the surface of said bar stock during transverse movement of the turret, said gripping means being adapted to securely grip the bar stock during longitudinal movement of said turret to slideably position said bar stock through a work area,
- adjustment means for setting said first and second gripping means in spaced relationship relative to one another.
A feed device for positioning elongate bar stock for machining operations in a machine tool having a carriage and a crosslide, means for slideably positioning the carriage and the crosslide along axes which are respectively parallel and perpendicular to the axis of rotation of the bar stock, a multifaced turret, each face of the turret containing a tool or other device for performing machining operations on the bar stock, and means for rotatably securing the turret to the crosslide, said feed device comprising:
- an elongate member having a first and second ends,
- means on said first end for fixedly securing to said turret;
- first and second cutting elements disposed in spaced opposed relationship on the second end of said elongate member operative to form diametrically opposed notches in the surface of said bar stock during transverse movement of said turret, said cutting elements means being adapted to securely grip said notches in said bar stock during longitudinal movement of said turret to slideably position said bar stock through a work area.
In a machine tool for operating on bar stock, the machine tool including a carriage and a crosslide means for slideably positioning the carriage and the crosslide along axes which are respectively parallel and perpendicular to the axis of rotation of the bar stock, and a multi-faced turret rotatably secured to the crosslide, each face of the turret containing a tool or other device for performing machining operations on the bar stock, a gripping apparatus fixedly secured to one face of the turret, said gripping apparatus including:
- first and second elongate arms, a pivot element interconnecting said first and second elongate arms at the first end of the elongate arms, said pivot element being fixedly secured to one face of the turret;
- a cylindrical roller rotatably mounted on the second end of each of the elongate arms, such that the axis of rotation of each of the rollers is parallel to the axis of rotation of the bar stock, each of the rollers having a sharp circumferential ridge projecting outwardly from the peripheries thereof, the rollers being disposed in space opposed relationship to each other,
- whereby, as the elongate arms are slideably positioned by moving the turret in a direction transverse to the axis of rotation of the bar stock, and as each of the arms surround the bar stock, engaging the bar stock therebetween, the ridges on the cylindrical rollers contact the surface of the bar stock forming notches therein and maintaining a sufficient grip upon the bar stock that the bar stock may be slideably positioned by moving the turret in a direction parallel to the rotational axis of the bar stock.
Dependencies are inferred from the claim text.