WO1989000904A1 - Outil de decoupe - Google Patents

Outil de decoupe Download PDF

Info

Publication number
WO1989000904A1
WO1989000904A1 PCT/US1988/002517 US8802517W WO8900904A1 WO 1989000904 A1 WO1989000904 A1 WO 1989000904A1 US 8802517 W US8802517 W US 8802517W WO 8900904 A1 WO8900904 A1 WO 8900904A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
workpiece
members
jaw
cutting tool
Prior art date
Application number
PCT/US1988/002517
Other languages
English (en)
Inventor
Thomas W. Dubey
Original Assignee
Dubey Products, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dubey Products, Inc. filed Critical Dubey Products, Inc.
Publication of WO1989000904A1 publication Critical patent/WO1989000904A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D21/00—Machines or devices for shearing or cutting tubes
    • B23D21/06—Hand-operated tube-cutters
    • B23D21/08—Hand-operated tube-cutters with cutting wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/169—Hand held tube cutters

Definitions

  • This invention relates to cutting tools, and, more particularly, to portable pipe cutting tools for cutting pipes or tubing on the job.
  • U.S. patent 2,230,030 of Finch discloses a plier type of pipe or tubing cutter which does not use a ratchet mechanism.
  • the tool of Finch can achieve a full 360° cut of the tubing by the disposition of cutters on each of the jaws of the pliers, substantially opposite each other.
  • three auxiliary cutters are mounted in one jaw of the pliers, while a main cutting wheel is mounted in the other jaw.
  • a full 360° cut may be realized by rocking the pliers back and forth without the necessity of rotating the pliers through 360°.
  • a problem inherent in all such cutting wheel type devices is the tendency of the cutter or cutters to "walk" laterally during operation, resulting in a spiral cut.
  • the present invention overcomes the aforementioned problems of the prior art without resort to ratchet mechanisms, without the necessity of continuous 5 adjustment, and without producing a spiral cut.
  • the invention comprises a plier type device having first and second jaws with an actuating leg depending from each jaw and with the jaws shaped to receive circular tubing.
  • a first pair of cutting wheels mounted in one of the jaws.
  • a second pair of cutting wheels is mounted in the other jaw.
  • a V-shaped block or cradle mounted in one of the jaws and located between the pair of cutting wheels in that jaw.
  • the cradle is slidably 5 mounted to move radially with respect to the pipe or tubing to be cut, and is spring-loaded so as to remain in contact with the tubing during operation.
  • the V-shaped cradie or block not only serves to locate the tubing centrally with respect to o the adjacent cutter wheels, through a wide range of tube diameters, but also functions to prevent lateral "walking" of the tool relative to the tubing, thereby preventing a spiral cut.
  • the V-shaped surface in contact with the tubing in the region of the 5 cut also acts to reduce burring.
  • the use of four cutting wheels materially reduces the distance through which the tool must be moved to achieve a full 360° cut, thus making it well suited for use in even extremely cramped situations.
  • the pair of cutting wheels opposite the V-shaped cradle is mounted in a cradle assembly which is pivotally mounted in the jaw opposite the jaw containing the V-shaped cradle, thereby permitting the wheel assembly to move in a rocking motion.
  • the resilient cradle comprises a V-shaped leaf spring, the resiliency of which insures that the cradle is in contact with the work piece during operation.
  • the spring is slotted to insure access of the cutting wheels to the work piece while the V-shaped spring remains in contact therewith throughout the cutting operation.
  • FIG. 1 is an elevation view of one preferred embodiment of the invention.
  • Fig. 2 is a view of one of the jaws along the line A-A of Fig. 1.
  • Fig. 3 is a view of the other of the jaws along the line B-B of Fig. 1.
  • Fig. 4 is a partial elevation view of the tool of the invention in an intermediate step in its operation.
  • Fig. 5 is a partial elevation view of the tool of the invention in the cutting phase of its operation.
  • Fig. 6 is a sectional view of the cradle and cutters relative to the workpiece, taken along the line C-C of Fig. 3.
  • _ Fig. 7 is a partial elevation view of a second embodiment of the invention showing the rocker mounted cutting wheels.
  • Fig. 7A is a detail view of the V-shaped cradle 5 mounting in the embodiment of Fig. 7, taken along the line E-E.
  • Fig. 8 is a view taken along the line D-D of Fig. 7.
  • Fig. 9 is a perspective view of the jaws of the 10 tool of Fig. 7.
  • Fig. 10 is a partial elevation view of the tool of the invention wherein the cradle is formed by a V-shaped leaf spring.
  • Fig. 11 is a plane view of the formed blank from 15 which the V-shaped leaf spring is formed.
  • the cutting tool of Fig. 1 embodying the features of the present invention, is a plier type tool 11
  • first jaw member 12 having a first jaw member 12 and a second jaw member 13, pivoted by any suitable means 14 such as a pin, and from which depend legs 16 and 17 respectively.
  • Legs 16 and 17 are shown coated with suitable coating material 18 to facilitate gripping by the operator.
  • Jaws 12 and 13 are basically arcuate in shape and, when closed, present a substantially circular opening 19 of sufficient diameter to contain a workpiece, e.g., pipe or tubing 21. At their free ends, jaws 12 and 13 are chamfered to make sloping surfaces 22 and 23, and 0 reverse sloped surfaces 24 and 26. Surfaces 22 and 23 facilitate slipping the tool over the workpiece 21, while surfaces 24 and 26 facilitate slipping the tool off of the workpiece 21 if desired or necessary.
  • Jaw 12 has first and second slots 27 and 28 within which are mounted on axial pins 29 and 31 cutting wheels 32 and 33. Cutting wheels 32 and 33 are mounted on pins 29 and 31 respectively so as to turn freely 5 during the cutting operation.
  • jaw 13 has a pair of cutting wheels 34 and 36, mounted on axial pins 37 and 38 within slots 39 and 41, which turn freely during the cutting operation.
  • V-shaped or cradle member Mounted in jaw 13 is a V-shaped or cradle member
  • Member 42 which is movable in a radial direction relative to the workpiece. The details of member 42 will be discussed more fully hereinafter in conjunction with Fig. 6. Member 42 is mounted closely adjacent cutting wheels 34 and 36, and has slots 43 and 44 in its sides 5 to avoid interference with the free rotation of wheels 34 and 36.
  • the workpiece 21 may actually cam the jaws 12 and 13 apart when sloping surfaces 22 and 23 are pressed against it, 0 permitting the workpiece 21 to drop into opening 19 and bear against wheels 32 and 33 on one side and the V-shaped surface of cradle 42 on the opposite side.
  • the V-shaped surface is. capable of centrally locating a circular object over a wide range of diameters, and the 5 V-surface of block or cradle 42 performs such a function here.
  • jaws 12 and 13 close until cutting wheels 34 and 36 are brought to bear against the pipe or workpiece 21.
  • cradle 42 is forced Q to move radially to the position shown in Fig. 5, without ever being out of contact with workpiece 21, as will be seen more clearly hereinafter. Cutting is achieved by rocking tool 11 back and forth, as indicated by. the arrow in Fig. 5. Because wheels 32, 5 33, 34 and 36 are substantially evenly spaced around the periphery of workpiece 21, it is only necessary to rock the tool 11 through an arc of slightly more than 90° to achieve a full 360° peripheral cut. At the same time, cradle 42, which bears firmly against the workpiece, suppresses the tendency of the cutting wheels to "walk” laterally, thereby preventing spiral or off line cuts. In addition, the V-surface of cradle 42 bears against workpiece 21 along the line of the cut, thereby tending to smooth out or compress any burring that may occur.
  • Fig. 6 In Fig. 6 are shown the details of one form of mounting arrangement for cradle 42.
  • a pair of tangs 46 and 47 which may be round, square or rectangular in shape and which are slidably movable in locating holes or slots 48 and 49, formed in jaw 13.
  • Midway between holes 48 and 49 is a hole 51 bored in jaw 13, at the bottom of which is drilled a hole 52 of smaller diameter, thereby forming a shoulder or seat 53 upon which one end of a coil spring 54 rests.
  • the other end of coil spring 54 bears against the underside of cradle or V-block 42.
  • the degree of compression of spring 54, and thereby the force with which cradle 42 bears against the workpiece 21, is controlled by a bolt 56, the threaded end of which is screwed into block 42 and the slotted head 57 of which is located in a counterbore 58.
  • the diameter of bolt 56 is such that it passes freely through hole 52 and spring 54.
  • the compression of spring 54 can be increased by the bolt 56 being screwed further into block 42, or decreased by backing the bolt 56 out.
  • this arrangement insures that the V-surface of cradle or block 42 can be made to bear firmly against workpiece 21 while at the same time, the resilient mounting makes it free to move radially ' relative to the workpiece as the jaws are opened or closed.
  • Cradle 42 may be made of any of a number of different material such as, for example, nylon or plastic, or suitable metal.
  • Fig. 7 there is shown a second embodiment of the invention, in which one pair of cutter wheels are mounted in a rocker assembly.
  • the embodiment of Fig. 7 Q comprises a first jaw 61 and a second jaw 62, pivoted together by suitable means 63.
  • Jaw 62 has a slot 64 within which is mounted a rocker assembly 66 comprising first and second bifurcated arms 67, 68 and ⁇ a depending mounting member 69 which is pivotally mounted to jaw 62 by any suitable means 71.
  • a cutting wheel 72 is rotatably mounted within the bifurcation of arm 67 by axis pin 73, as best seen in Fig. 8.
  • a cutting wheel 74 is mounted to arms 68 by pin 76. Wheels 72 and 74 are free to turn without interference, and assembly 66 is free to rock back and forth within the limits defined by slot 64.
  • Jaw 61 has mounted therein cutting wheels 77 and 78 which freely turn in slots 79 and 81 about axial pins 82 and 83, " as best seen in Fig. 9. Also resiliently mounted to jaw 61 is a V-shaped cradle 84 between wheels 77 and 78. As best seen in Fig. 9, the sides of the body of cradle 84 are recessed to provide clearance for rotatable wheels 77 and 78. A tang 86, preferably of square or retangular shape, depends from the body of cradle or block 84 and is free to move within a recess or bore 87 in jaw 61. Bore 87 is of sufficient depth to prevent bottoming of tang 86 therein. As was the case with the embodiment of Fig.
  • cradle or block 84 bear against the workpiece 21 at all times during the cutting operation.
  • this is achieved by a pair of coil springs 88 and 89, located on either side of tang 86 between block 84 and jaw 61, which exercise sufficient pressure on block 84 to maintain it in firm contact with workpiece 21.
  • the ends of springs 88 and 89 are preferably located in recesses 91 and 92 in jaw 61, and 93 and 94 in block ; 84, in order to insure their proper location.
  • cradle assembly 66 provides an automatic adjustment of the relative positions of the two cutting wheels so that they bear with equal force on the workpiece.
  • Fig. 10 there is shown a cutting tool embodying the principles of the invention in which the resilient cradle is of a simpler construction than those of the preceding embodiment.
  • Fig. 10 comprises a tool having first and second jaws 101 and 102.
  • Jaw 102 is basically of the same construction as jaw 62 of Fig. 7, and the same reference numerals used in Fig. 7 apply to like elements in Fig. 10.
  • elements of jaw 101 that are like or similar to those of jaw 61 in Fig. 7 are designated by the same reference numeral.
  • a resilient generally V-shaped cradle member 103 mounted on jaw 101 is a resilient generally V-shaped cradle member 103, formed by a leaf spring bent into a V-shape.
  • the mounting means may be, for example, a pair of screws 104, 104, only one of which is shown in Fig. 10.
  • Blank 106 comprises a rectangular piece of spring steel or other suitable material having sufficient resiliency and strength.
  • Blank 106 has first and second slots 107 and 108 cut therein to create clearance for cutting wheels 77 and
  • a pair of mounting holes 109 and 111 is drilled in blank 106 to accommodate screws 104, 104.
  • blank 106 is bent along dotted lines 112 and 113 to create the

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

Outil de découpe de tuyau comprenant une paire de mâchoires (61/62) pivotées. Une paire de roues coupantes (77/78) est montée sur une mâchoire (61), une autre paire de roues coupantes (72, 74) étant montée sur une bascule (66) que l'on fait pivoter vers l'autre mâchoire (62). Un berceau (42) en forme de V est monté sur la mâchoire (61) afin de maintenir un tuyau (21) à mesure que celui-ci est coupé par les roues coupantes.
PCT/US1988/002517 1987-07-24 1988-07-25 Outil de decoupe WO1989000904A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7745687A 1987-07-24 1987-07-24
US077,456 1987-07-24

Publications (1)

Publication Number Publication Date
WO1989000904A1 true WO1989000904A1 (fr) 1989-02-09

Family

ID=22138162

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/002517 WO1989000904A1 (fr) 1987-07-24 1988-07-25 Outil de decoupe

Country Status (1)

Country Link
WO (1) WO1989000904A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230150A (en) * 1992-05-08 1993-07-27 Sperti Vincent R Tubing cutter applying continuous cutting force to tubing
GB2288353A (en) * 1994-04-16 1995-10-18 Monument Tools Ltd Hand tool
EP0730933A1 (fr) * 1995-03-07 1996-09-11 VULKAN LOKRING GmbH & Co. KG Pince coupe-tube
US6810587B1 (en) 2003-08-15 2004-11-02 Duane D. Robertson Combined clamping and cutting tool for plastic pipes
FR3017555A1 (fr) * 2014-02-18 2015-08-21 David Perrier Pince coupe-tube
US9908185B1 (en) * 2016-11-21 2018-03-06 Jiin Haur Industrial Co., Ltd. Cutting device with wheeled blades

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US801866A (en) * 1905-01-18 1905-10-17 Headson Tool & Mfg Company Pipe-cutting tool.
US2325353A (en) * 1942-04-03 1943-07-27 Ridge Tool Co Pipe cutter
US3249998A (en) * 1965-06-11 1966-05-10 William E Shultz Pipe cutter having disc type cutting means and flexible means to operate said cutter
US3672050A (en) * 1970-08-05 1972-06-27 Mc Donnell Douglas Corp Tube cutter
US4345376A (en) * 1979-11-15 1982-08-24 Reed Manufacturing Company Cutter for thick wall plastic pipe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US801866A (en) * 1905-01-18 1905-10-17 Headson Tool & Mfg Company Pipe-cutting tool.
US2325353A (en) * 1942-04-03 1943-07-27 Ridge Tool Co Pipe cutter
US3249998A (en) * 1965-06-11 1966-05-10 William E Shultz Pipe cutter having disc type cutting means and flexible means to operate said cutter
US3672050A (en) * 1970-08-05 1972-06-27 Mc Donnell Douglas Corp Tube cutter
US4345376A (en) * 1979-11-15 1982-08-24 Reed Manufacturing Company Cutter for thick wall plastic pipe

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230150A (en) * 1992-05-08 1993-07-27 Sperti Vincent R Tubing cutter applying continuous cutting force to tubing
GB2288353A (en) * 1994-04-16 1995-10-18 Monument Tools Ltd Hand tool
GB2288353B (en) * 1994-04-16 1996-11-27 Monument Tools Ltd Hand tool
EP0730933A1 (fr) * 1995-03-07 1996-09-11 VULKAN LOKRING GmbH & Co. KG Pince coupe-tube
US6810587B1 (en) 2003-08-15 2004-11-02 Duane D. Robertson Combined clamping and cutting tool for plastic pipes
FR3017555A1 (fr) * 2014-02-18 2015-08-21 David Perrier Pince coupe-tube
US9908185B1 (en) * 2016-11-21 2018-03-06 Jiin Haur Industrial Co., Ltd. Cutting device with wheeled blades

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