| 摘要 |
The triple-jaw gripping cartridge, the method and the device for cutting the teeth of its gripping jaws can find application in machines operating revolving tools, such as bores, mills, reamers, counter-bores, as well as machines with numerical control machines, hand-operated drills and others. They ensure precision and accurate cutting, The gripping jaws secure smooth motion at increased safety of gripping of the tool and improved accuracy of its revolving. The cartridge operates with increased gripping force of the tool at reduced by values applied forces of tightening and releasing the revolving tool. The triple-jaw gripping cartridge comprises a body (1) in which three gripping jaws (3) with gear sectors formed on their external side are housed, meshed, respectively, to a taper threading of a washer (5) to a gear, and opposite the gear sector a surface for getting in contact with the gripping tool is machined and orientated at an angle. All teeth of the gear sector of the jaws (3) are identical and have pitch and shape of their profile identical to those of the taper threading of gear (5) The teeth are machined on a cylindrical surface (7), the axis of which is parallel to the axis of jaw (3), wherein both axes lie on the same plane getting across its symmetrical line, and the radius of surface (7) is identical with the minimal inner radius of the taper threading. The teeth of the gear sector are machined in arc-like shape with a curvature determined during the revolutions in their cutting towards an axis (13) fitted at an angle towards axis (8) of jaw (3), with a radius equal to the minimal external radius of the taper threading, and teeth inclination towards the longitudinal axis (8) of jaw (3), which is identical to the angle of ascent of the taper threading, determined by its average radius. By the method, the teeth are cut, wherein the gripping jaw is set along its longitudinal axis in a feeding shape-forming mechanism, the axis of revolution of which is orientated at an angle towards the axis of the jaw which is being cut. The feeding motion of the shape-forming mechanism is in the form of a rotative oscillating motion at a specified angle. The cut jaw is fed to the cutting tool and the first tooth space, after which the feeding motion is discontinued and the jaw which is being cut is shifted along its axis at a distance equal to one pitch of the taper threading. In reversing the rotative feeding motion, the second tooth space is cut, followed by its discontinuation, and the jaw is axially shifted to one pitch. 11 claims, 16 figures
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