Holder for cutting tool inserts
AssigneeZinner GmbH Prazisionswerkzeuge
InventorKarl Zinner
Life of this patent
Estimating the term…
Abstract
A holder for cutting tool inserts, particularly for carving or cutter bits, with a gripper slot, which in each case holds these inserts and the opposite jaws of which have an oval slotted area, into which a prop-open key with an elliptical cross sectional profile can be inserted and turned. The oval slotted region is formed from two recesses, which lie opposite to one another each in a jaw and which run corresponding to the two smaller apical circles of curvature of the elliptical cross sectional profile and are at a distance from one another, the magnitude of which lies between the length of the larger axis of the ellipse and that of the smaller axis of the ellipse.
Claims18
A holder device for a cutting tool insert comprising a holder member having a slot which separates two spaced jaws, said jaws receiving and clamping said insert, said two spaced jaws having opposed arcuate surfaces arranged such that said jaws are opened by initially inserting an opening tool having an oval cross-sectional configuration between said opposed arcuate surfaces of said spaced jaws with the closely spaced opposed sides of the opening tool disposed opposite said opposed surfaces of said jaw and then rotating said opening tool so that the widely spaced opposed sides of said opening tool are disposed opposite said opposed arcuate surfaces of said jaw, said closely spaced opposed sides of said opening tool being spaced from one another a first diametrical distance, said widely spaced opposed sides of said opening tool being spaced from one another a second diametrical distance, said second diametrical distance being greater than said first diametrical distance, said opposed arcuate surfaces of said jaws being spaced from one another a third diametrical distance when in a natural unsprung state, said third diametrical distance being greater than said first diametrical distance and less than said second diametrical distance.
The combination comprising a holder means for a cutting tool insert and an opening tool for facilitating insertion and withdrawal of said insert from said holder means, said holder means having a slot which separates two spaced jaws, said jaws receiving and clamping said insert, said two spaced jaws having opposed arcuate surface such that said jaws are opened by initially inserting said opening tool having an oval cross-sectional configuration between said spaced jaws with the closely spaced opposed sides of the opening tool disposed opposite said opposed arcuate surfaces of said jaw and then rotating said opening tool so that the widely spaced opposed sides of said opening tool are disposed opposite said opposed arcuate surfaces of said jaws, said widely spaced opposed sides of said opening tool being spaced from one another a first diametrical distance, said closely spaced opposed sides of said opening tool being spaced from one another a second diametrical distance, said opposed arcuate surfaces of said jaws being spaced from one another a third diametrical distance when clamping said insert, said third diametrical distance being less than said second diametrical distance and greater than said first diametrical distance, said opening tool being in an insertion rotational position when said opening tool is initially inserted between said opposed arcuate surfaces of said jaws, said closely spaced opposed sides of said opening tool being disposed opposite said opposed arcuate surfaces of said jaws when said opening tool is in said insertion rotational position, said opening tool being in an operational rotational position when said widely spaced opposed sides of said opening tool are disposed opposite said opposed arcuate surfaces of said jaws, said operable rotational position being spaced approximately 90 degrees from said insertion rotational position.
Dependencies are inferred from the claim text.