Compensated tool holder for tapping spindles
AssigneeMeccanica Arnes S.A.S. di Tralli Domenico & C.
InventorDomenico Tralli
Life of this patent
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Abstract
A tool holder for tapping spindles includes a coaxial body (5) composed of an upper hollow half-pin (6) and a lower hollow half-pin (9) which engage mutually and coaxially through a conic semielastic coupling (190) associated with a sequential threaded coupling (11). One (6) of the hollow half-pins includes a continuous conical part (19) capable of sliding in the axial direction, under the action produced by the threaded coupling (11) of the discontinuous conic part (17) of the other hollow half-pin (9). The discontinuous conic part deforms elastically, squeezing on a stem (13) of the tool to be tapped, tying the same.
Claims7
A compensated tool holder for tapping spindles, comprising a spindle (1) and a coaxial hollow body (5) inserted in said spindle (1) and axially sliding therein, said coaxial hollow body (5) comprising an upper hollow half-pin (6) and a lower hollow half-pin (9) that engage mutually and coaxially through a semielastic conic coupling (10), associated with a sequential threaded coupling (11), wherein:
- (a) the spindle (1) has an external conic structure (2) configured as a tool holder and an internal coaxial structure provided with a coaxial central chamber (3), having a lower abutment (4), and with radial sliding half-grooves (25);
- (b) the upper hollow half-pin (6) of the coaxial body (5) comprises an abutment (7);
- a lower end (17), below the abutment (7), comprising an intermediate threaded portion (18) followed by an end portion having a conic profile (19), the complete extension of the sequential portions (18, 19) being provided with longitudinal notches (20) of elastic deformations;
- and an upper end, above the abutment (7), provided, on the external circumference, with radial half-grooves (25′), and having a quadrangular hole (14) for the coupling and rotational pulling of the tool, through the corresponding tang (15);
- (c) elastic pressure means (8), with a pressure compensating calibration during operating phases, is engaged between the abutment (4) of the spindle (1) and the abutment (7) of the upper hollow half-pin (6);
- (d) guiding and rotational drawing means (26) are arranged between the aligned radial half-grooves (25, 25′) of the spindle (1) and of the upper end of the upper hollow half-pin (6);
- and
- (e) the lower hollow half-pin (9) comprises an upper end with a threaded portion (21) followed by a conic portion 22, said portions (21, 22) being complementary to the corresponding portions (18, 9) of the lower end (17) of the upper hollow half-pin (6).
Dependencies are inferred from the claim text.