US2652751A - Tube sizing lubricator - Google Patents

Description

\ sept. 22, 1953 J. FISCHER, JR

TUBE SIZING LUBRICATOR Filed Jan. 6, 1951 mm E mm M .B ,T E4 A A J Patented Sept. 22,F 1953 TUBE SIZING LUBRICATOR Jacob Fischer, Jr., Stratford, Conn., assignor to Remington Arms Company, Inc., Bridgeport, Conn., a corporation of Delaware Application January 6, 1951, Serial No. 204,770

(Cl. EIS-83) 2 claims. 1

` This invention relates to the sizing of tubes, particularly tubes of fibrous stock usually wound from paper, and especially to the surface lubrication of tubes of this type adapted for use as shot shell bodies as such tubes are advanced into the sizing die.

A machine for the sizing of tubes of this character is described in the patent to Messinger, No. 2,485,007, October 18, 1949. The patented machine is of multiple arbor-and-die type, and provides for the intermittent delivery of a lubricant above each arbor and the tube thereon at points immediately in front of each sizing die. Lubricant flows, at least during each forward or sizing stroke of the arbors, whether the arbor carries a tube or not. The devices for feeding tubes to the several arbors are of such character that occasionally one or more of the several arbors will be advanced without a tube, and the excess of lubricant on the arbor surface is undesirable.

The present invention contemplates a device for delivering lubricant to the entire periphery of each tube as it moves toward the sizing die, and for preventing the flow of lubricant in the absence of a tube.

In the drawings:

Fig. 1 is a sectional elevation of a die holder having mounted therein the lubricant control device of the invention.

Fig. 2 is a section substantially on the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary sectional elevation of a part of the mechanism of Fig. 1, showing the displacement of the lubricant controlling valve by the presence of a tube.

Fig. 4 is a fragmentary elevation showing the construction of the tube supporting arbor, arbor extension and collet assembly.

Fig. 5 is an end view of a tube-abutting collet.

Each sizing die I0 is supported in an upwardly opening recess in a supporting plate Il which extends transversely of the machine. Each die is held against transverse movement with respect to its supporting plate II by a yoke member I2, the fork of which receives the upper portion of a section of plate II, and may be arranged for vertical movement in its aperture in plate II, as described in the patent to Messinger, No. 2,506,161, May 2, 1950. A tube is sized by passing through die I0, and for this operation the tube is impaled on a sizing arbor I4. In an aperture in the leg I3 of yoke I2 which faces the (retracted) sizing arbor I4 is secured a bushing identied generally by numeral l5. Said bushing comprises an outwardly daring mouth portion I6 serving as a guide for arbor I4 and the tube thereon, and said mouth portion I6 merges with a generally cylindrical throat portion I'I of a diameter equal to or but slightly less than the diameter of an unsized tube. Throat Il comprises an annular recess or ring groove I8 which provides an open passage completely around the periphery of a tube in the bushing, the surface of the tube being contacted on both sides of said passage by the cylindrical surface of throat I'I.

Means are provided for delivering lubricant to the ring groove I 8, and for controlling the delivery of lubricant in such a manner that none is delivered unless a tube T is impaled upon and moving with the arbor I4. Lubricant is received from a suitable source of supply and under an appropriate pressure, say about 2 pounds, through tube '28 which communicates with a passage 2| through the yoke I2. Passage 2l intersects a passage 22 in the top of bushing I5. The lower portion of passage 22 provides a seat 23 for a ball valve 24, the diameter of the valve seat being such that the lower portion of ball 24 projects into the throat I1 of bushing I5 and will be displaced upwardly, permitting the flow of lubricant into ring groove I8 by the presence of a tube T on arbor I4, as shown in Fig. 2. Excess lubricant escapes from ring groove I8 through aligned apertures I9 in the bottom of yoke I2 and bushing I5. The projection of ball 24 into throat I1 is such that it is not displaced by the passage through throat I1 of an empty arbor, but requires the presence on the arbor of a tube T. Ball 24 is held against its seat 23 by suitable means, such as a spring 25 abutting a screw 26 held in an `aperture in yoke I2, which aperture is in alignment with aperture 22.

To provide for a positive thrust of each tube through sizing die Ill, the rearward end of such tube abuts a shoulder 21 (Fig. 4) on a spring collet abutment member 28 mounted on a joining member or adapter 29, said adapter serving to connect arbor I4 with an arbor carrier or extension 30. Referring again to the patent to Messinger, No. 2,485,007, it will be noted that each arbor extension 30 is of substantially the same length as the arbor itself, and that the portion of each collet 28 adjacent shoulder 21 must pass entirely through sizing die I0 to enable the stripping of a tube from its arbor upon the return movement of the arbor. The exterior diameter of collet 28 is such that if it were peripherally continuous it would lift the ball valve and cause an undesired flow of lubricant over the collet. To obviate this, one of the several spring ngers 3l which comprise the collet is omitted, as shown in Fig. 4, and the collet is so oriented that the blank is located at the top, opposite ball 24. To secure the collet in this position, recesses, opening from one end of said collet, receive the end portions of a stud 33 extending through adapter 29, and each arbor extension 30 is held in proper orientation by suitable means such as a plate 34 located adjacent the arbor extension support, extending transversely of the set of arbor extensions, and apertured to receive each arbor extension, each such extension being held against rotation in the plate by suitable means such as a set screw 35.

As seen in Fig. 3, when a tube upon arbor I4 is presented to the bushing l5, the ball valve 24 is opened, admitting lubricant to the ring groove I8 through which it ows about the entire periphery of the tube, excess lubricant escaping through passage I9. The lubricant is substantially conned to that portion of the tube opposite the ring groove I8, adjacent surfaces of the tube being in contact with the face of throat l1. As seen in Fig. 2, when an empty arbor is thrust into the bushing the valve is not displaced, nor is it displaced when the shouldered portion of collet 28 enters the bushing, due to the mutilation of the collet opposite the valve.

What is claimed is:

1. Apparatus for the sizing of a tubular workpiece, comprising a workpiece supporting arbor, a sizing die, a holder for said die, a bushing in said .holder held in alignment with said die when said die is in Working position, Said bushing comprising an aperture bounded by a surface adapted for engagement by a workpiece on said arbor and a ring groove intersecting said surface, communieating lubricant delivering passages through said '4 holder and said bushing adapted to deliver lubricant to said ring groove, and lubricant delivery controlling means in said passage and projecting into said aperture in spa/ced relationship with said arbor and adapted for displacement by a workpiece on said arbor.

2. Apparatus for the sizing of a tubular workpiece, comprising a workpiece supporting arbor, a sizing die, a holder for said die, a bushing in said holder held in alignment with said die when said die' is in working position, said bushing comprising an aperture bounded by a surface adapted for engagement by a workpiece on said arbor and a ring groove intersecting said surfacey communicating lubricant delivering passages through said holder and said bushing adapted to deliver lubricant to said ring groove, lubricant delivery controlling means in said passage and projecting into said aperture in spaced relationship with said arbor and adapted for displacement by a workpiece on said arbor, and a workpiece abutment associated with said arbor and adapted to enter said bushing, the construction and arrangement being such as to provide clearance between said abutment and said lubricant delivery controlling means.

JACOB FISCHER, JR.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,917,767 Larson July 11, 1933 2,208,636 Johnson July 23, 1940 2,473,383 Messinger June 14, 1949 2,485,007 Messinger Oct. 18, 1949 2,506,161 Messinger May 2, 1950 2,533,704 Zanetti Dec. 12, 1950

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