Chamfering reamer with trip shoulder
First Claim
1. An adjustable reaming tool for installation in the bore of a tripping die head of a threading machine for reaming the outside and inside diameters at the end of a threaded pipe or conduit and for activating a trip mechanism to open the die head, the adjustable reaming tool comprising;
- a generally cylindrical outer sleeve having a rear end adapted to be secured in a tool holder, a central bore extending rearwardly from the front end and a plurality of circumferentially spaced projections extending forwardly from the front end,the interior surface of each said projection extending rearward and inward at an angel relative to the longitudinal axis to form an inwardly tapered reaming surface to receive and ream the outer diameter at the end of a pipe or conduit received thereon and terminating in a trip shoulder extending radially inward to said central bore and angled transversely to contact the end surface of the pipe or conduit being reamed,said outer sleeve projections including said trip shoulder when viewed from the front end each have diametrically opposed flat leading edge surfaces and a flat tailing edge surface spaced generally parallel thereto in a clockwise direction from said leading edge surface and said inwardly tapered reaming surface extends therebetween,an inner reamer insert having a cylindrical rear portion and a truncated conical forward end longitudinally fluted to define a plurality of circumferentially spaced wings extending longitudinally rearward and outward a distance from the front end at an angle relative to the longitudinal axis to form a segmented generally conical reaming portion to be received partially within the interior diameter of a pipe or conduit to ream the interior diameter at the end of the pipe or conduit received thereon,said inner reamer insert rear portion slidably received within said outer sleeve central bore and said inner reamer insert wings positioned between said outer sleeve projections in alternating relation such that when viewed from the side, each said rearwardly and outwardly extending wing overlaps the adjacent trip shoulder of said outer sleeve projection and the adjacent angled surfaces cooperatively form a plurality of inwardly extending, flat bottom, V-shaped grooves with said trip shoulder forming the bottom of the groove, andlongitudinal adjustment means threadedly connected between the rear portions of said inner reamer insert and said outer sleeve along the the longitudinal axis to adjustably position said inner reamer insert wings longitudinally relative to said outer sleeve projections, wherebythe width of said flat-bottom, V-shaped grooves can be adjustably altered to receive pipe or conduit of various wall thicknesses and to simultaneously ream the exterior and interior diameters at the end of the pipe or conduit with said trip shoulder contacting the end surface of the pipe or conduit being reamed with sufficient force to activate the trip mechanism of the die head.
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Accused Products
Abstract
A adjustable chamfering reamer used in automated threading machines for reaming the ends of pipe or conduit. The adjustable chamfering reamer has an inner reamer insert adjustably installed within a generally cylindrical outer sleeve. The front of the outer sleeve has circumferentially spaced forwardly extending projections with a flat inwardly and rearwardly angled reaming surface and a trip shoulder at the bottom thereof. The inner reamer insert has a trunched conical forward end defined by a plurality of circumferentially spaced longitudinal wings extending rearwardly and outwardly from the forward end and the exterior of the wings are curved reaming surfaces. When assembled, the wings are positioned between the projections of the outer sleeve in alternating relation. When viewed from the side, the overlapped reaming surfaces and shoulders form a plurality of rearwardly extending flat-bottom V-shaped grooves. The width of the flat-bottom V-shaped groove can be adjustably altered by positioning the inner reamer insert relative to the outer sleeve to receive pipe or conduit of various wall thicknesses and to ream the exterior and interior diameters at the end of the pipe or conduit simultaneously. The adjustable reamer is secured in the die head of a threading machine and receives the end of a pipe or conduit during the threading operation.
23 Citations
16 Claims
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1. An adjustable reaming tool for installation in the bore of a tripping die head of a threading machine for reaming the outside and inside diameters at the end of a threaded pipe or conduit and for activating a trip mechanism to open the die head, the adjustable reaming tool comprising;
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a generally cylindrical outer sleeve having a rear end adapted to be secured in a tool holder, a central bore extending rearwardly from the front end and a plurality of circumferentially spaced projections extending forwardly from the front end, the interior surface of each said projection extending rearward and inward at an angel relative to the longitudinal axis to form an inwardly tapered reaming surface to receive and ream the outer diameter at the end of a pipe or conduit received thereon and terminating in a trip shoulder extending radially inward to said central bore and angled transversely to contact the end surface of the pipe or conduit being reamed, said outer sleeve projections including said trip shoulder when viewed from the front end each have diametrically opposed flat leading edge surfaces and a flat tailing edge surface spaced generally parallel thereto in a clockwise direction from said leading edge surface and said inwardly tapered reaming surface extends therebetween, an inner reamer insert having a cylindrical rear portion and a truncated conical forward end longitudinally fluted to define a plurality of circumferentially spaced wings extending longitudinally rearward and outward a distance from the front end at an angle relative to the longitudinal axis to form a segmented generally conical reaming portion to be received partially within the interior diameter of a pipe or conduit to ream the interior diameter at the end of the pipe or conduit received thereon, said inner reamer insert rear portion slidably received within said outer sleeve central bore and said inner reamer insert wings positioned between said outer sleeve projections in alternating relation such that when viewed from the side, each said rearwardly and outwardly extending wing overlaps the adjacent trip shoulder of said outer sleeve projection and the adjacent angled surfaces cooperatively form a plurality of inwardly extending, flat bottom, V-shaped grooves with said trip shoulder forming the bottom of the groove, and longitudinal adjustment means threadedly connected between the rear portions of said inner reamer insert and said outer sleeve along the the longitudinal axis to adjustably position said inner reamer insert wings longitudinally relative to said outer sleeve projections, whereby the width of said flat-bottom, V-shaped grooves can be adjustably altered to receive pipe or conduit of various wall thicknesses and to simultaneously ream the exterior and interior diameters at the end of the pipe or conduit with said trip shoulder contacting the end surface of the pipe or conduit being reamed with sufficient force to activate the trip mechanism of the die head. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. The adjustable reaming tool according to claim I in which;
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said wings extend rearward and outward at an angle of approximately from 10°
to 15°
relative to the longitudinal axis of said inner reamer insert,said inwardly tapered reaming surfaces extend rearward and inward at an angle of approximately from 20°
to 30°
relative to the longitudinal axis of said outer sleeve, andsaid trip shoulder extends transversely from said leading edge to said trailing edge at an angle of from approximately 1°
to 3°
.
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Specification