Self-contained collet adaptor
First Claim
1. An adaptor comprising, in combination:
- a socket means of receiving a given collet;
a mounting means whose form is compatibly received by a given machine tool;
a drawbar means of transmitting an actuating force to said collet from said machine tool;
a drawbar stroke limiting means;
a means for adjusting the longitudinal position of said collet with respect to said drawbar and said socket in substantially small increments;
whereby the actuating force transmitted from said machine tool to said collet is effectively limited by said adaptor and is readily adjustable by a machinist.
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Accused Products
Abstract
A hollow body and drawbar coupler connect to form a collet adaptor with external configuration matching that of a commonly available draw-style spring collet. A receptacle at the anterior portion of the body holds the adapted collet. Tension applied by a machine tool drawbar is transmitted through the draw bar coupler and draw tube to actuate the adapted collet. A stop sleeve within the adaptor body limits the draw stroke, and thus the clamping force applied to the collet. The collet is threaded inward or outward by a machine operator to adjust clamping force. A keying ring within the adaptor maintains radial position of the collet via a friction mechanism. Differentially threaded engagements of the adaptor drawbar with the adapted collet and the body provide a self contained means for clamping the collet when the adaptor is removed from the machine tool. An optional unitary, cylindrical protuberance provides an extended nose for improved access to a chucked workpiece.
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Citations
20 Claims
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1. An adaptor comprising, in combination:
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a socket means of receiving a given collet; a mounting means whose form is compatibly received by a given machine tool; a drawbar means of transmitting an actuating force to said collet from said machine tool; a drawbar stroke limiting means; a means for adjusting the longitudinal position of said collet with respect to said drawbar and said socket in substantially small increments; whereby the actuating force transmitted from said machine tool to said collet is effectively limited by said adaptor and is readily adjustable by a machinist. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An adaptor comprising, in combination:
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a socket means of receiving a given collet; a mounting means whose form is compatibly received by a given collet receptacle of a given machine tool; a fixing means for maintaining radial position of said collet with respect to said adaptor comprising; a keying device, interfitting with a keyway means on said collet, and rotatably engaged with the adaptor; a frictional surface of the keying device, engaged with a receiving surface of the adaptor in a manner such that significant rotational friction of predetermined intensity is created between said keying device and the adaptor; whereby the radial position of said collet with respect to the adaptor is maintained by said fixing means during normal operation of the machine tool. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A collet holder comprising, in combination:
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a mounting means whose form is compatibly received by a given machine tool; a socket means of receiving a given collet; a means of generating a longitudinal draw force for actuating said collet, comprising a substantially rigid member, rotatably attached within said collet holder, having a threaded portion threadingly engaged with said collet holder, said portion having a chosen lead that differs from, and cooperates with, that of another threaded portion of said rigid member threadingly engaged with the received collet; whereby clamping of a given workpiece in said collet can be effected by said longitudinal force, generated with ease by a machinist upon rotation of said member with respect to said collet holder and said collet, which results from a compounded effect of differing longitudinal translocation rates of the threaded engagements of said member with said collet and said collet holder. - View Dependent Claims (19, 20)
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Specification