US20120125168A1 - Cutting Device - Google Patents

Cutting Device Download PDF

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Publication number
US20120125168A1
US20120125168A1 US13/388,734 US201013388734A US2012125168A1 US 20120125168 A1 US20120125168 A1 US 20120125168A1 US 201013388734 A US201013388734 A US 201013388734A US 2012125168 A1 US2012125168 A1 US 2012125168A1
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US
United States
Prior art keywords
carrier
cutting
guide
cutting device
cutting element
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/388,734
Other languages
English (en)
Inventor
Fraser Thomas O'Keefe
Andrew Loch
William McMinn
Michael James Elkington
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frelk Industries Pty Ltd
Original Assignee
Frelk Industries Pty Ltd
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 Frelk Industries Pty Ltd filed Critical Frelk Industries Pty Ltd
Assigned to FRELK INDUSTRIES PTY. LTD. reassignment FRELK INDUSTRIES PTY. LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOCH, ANDREW, MCMINN, WILLIAM, ELKINGTON, MICHAEL J., O'KEEFE, FRASER T.
Publication of US20120125168A1 publication Critical patent/US20120125168A1/en
Abandoned legal-status Critical Current

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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
    • B23D21/14—Machines or devices for shearing or cutting tubes cutting inside the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle
    • 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
    • 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
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/12—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade for cutting tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/12—Cut-off wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/16—Bushings; Mountings
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/143—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
    • 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
    • B26D3/163—Cutting tubes from the inside
    • 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
    • B26D3/166—Trimming tube-ends
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/0006—Means for guiding the cutter
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/002—Materials or surface treatments therefor, e.g. composite materials
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0046—Cutting members therefor rotating continuously about an axis perpendicular to the edge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8878—Guide

Definitions

  • This invention relates to a cutting device. It also extends to a cutting element for a cutting device, a guide or support member for use with a cutting device and a method of use of a cutting device.
  • the invention relates particularly but not exclusively to a cutting device that is suited to cutting pipes including pipes that are already installed in a structure. It will therefore be convenient to hereinafter describe the invention with reference to this application. However it is to be understood that it is capable of broader application. For example it can be used to cut sheets as well as pipes. Where the term “sheets” is used herein it shall be interpreted to cover concrete slabs, panels or even walls.
  • U.S. Pat. No. 4,576,070 refers to a pipe cutter wherein a power tool imparts rotational torque to a shaft having a circular cutting blade which is oriented orthogonally to the shaft.
  • a guide wheel which is journalled onto an end of the shaft remote from the cutting tool.
  • the cutting blade is aligned at an angle to the longitudinal axis of the pipe being cut so that it pierces a side wall of the pipe and upon rotation of the cutting blade it pierces the side wall.
  • the guide wheel is attached to the shaft in such a manner that it does not rotate.
  • Disadvantages of this conventional pipe cutter include the feature that the guide wheel has to engage the entire internal surface of the pipe to operate and also that the guide wheel is located at a substantial distance from the cutting wheel. Also the cutting wheel is of smaller diameter than the guide wheel. These factors in combination mean that in practice there will be gaps between the internal surface of the pipe and the guide wheel as well as a substantial gap between the internal surface of the pipe and the cutting wheel. This will severely impair the cutting efficiency of the pipe cutter because the guide wheel does not provide a secure support for the cutting wheel in use. The cutting wheel may laterally move in an unrestrained manner and cause injury and also cause an uneven cut. The cutting wheel will also have a tendency to wobble as the shaft is not oriented in a direction that coincides with the longitudinal axis of the pipe. Also this pipe cutter cannot be easily removed from the pipe after use and could not be used for pipes of different diameters.
  • Japanese Patent Publication 10-216376 which describes a pipe cutter which has a cutting wheel adjacent a free end of the cutter in use.
  • a guide wheel which is attached to a rotational shaft of the cutter which is driven by a power tool.
  • the guide wheel is located above the cutting wheel and thus the bearing wheel will bear against the portion of the pipe that is being cut off and removed from the remainder of the pipe. This will impair cutting because the cut part of the pipe will move during use of the pipe cutter and thus cause an uneven cut.
  • the guide wheel will become more ineffective as the cut continues due to a loss of the bearing surface.
  • a cutting device for cutting a work piece including:
  • an elongate carrier having a longitudinal axis, a tool end which is engageable with a power tool and a free end;
  • the space or spacing e.g. a peripheral spacing, as described above is useful in that it serves as a depth gauge and facilitates a user cutting the pipe or sheet to the required depth or thickness and stops the cutting element from travelling beyond the confines of the pipe being cut during use.
  • the axial distance between the cutting element and the guide member may be from 0.5-5.0 mm, for example 0.5-1.0 mm. This will also have relevance to the meaning of “closely adjacent” which means that the cutting element and the guide or support member are only separated by a short axial distance as exemplified above to provide for formation of the space.
  • the guide or support member by being located internally of the cutting element, e.g. on the other side of the cutting element to the tool end which is attached to the power tool, as shown in the drawings of the preferred embodiment hereinafter, does not deflect and provides a strong and stable support for the cutting element because it substantially engages a surrounding bearing surface of the pipe or sheet being cut in use without any gaps being present;
  • the guide member having a bearing surface that extends parallel to a longitudinal axis of the carrier and being spaced from the cutting element may rotate counter to the direction of rotation or in direction of rotation of the cutting element which in use facilitates displacement of the cutting device about an interior of a pipe being cut and thus makes the cutting device very efficient in use.
  • the guide or support member may be in the form of a guide wheel that is loosely mounted on the elongate carrier such that it can rotate relative thereto, e.g. it can rotate freely relative to the carrier.
  • the carrier may be in the form of a rod or shaft.
  • the cutting device may include a retaining formation that is located at the free end of the carrier and which has a larger transverse dimension than the carrier so as to loosely retain a seat or hub of the guide or support member on the carrier.
  • the carrier may have a threaded portion adjacent the retaining formation and a nut may be threaded onto the threaded portion of the carrier to hold the cutting element on the carrier.
  • the elongate carrier may have at least one key and the cutting element may define at least one keyway that is capable of retaining engagement with the key on the carrier.
  • the elongate carrier may include a pair of keys that engage with a corresponding pair of keyways on the cutting element.
  • the cutting device may include a disc on the carrier and fast therewith that incorporates said pair of keys.
  • the disc may be rigidly attached to the carrier or may be machined out of the carrier.
  • the cutting device may include a compression ring which engages a mating groove located in an end cap attached to the free end of the carrier and an aligned groove on the carrier whereby to securely retain the cutting element on the elongate carrier.
  • the cutting device may include a spring clip having a pair of outwardly extending legs biased away from each other and a pair of adjacent end projections or tabs located at a free end of each leg which engage with corresponding notches on the carrier, e.g. towards the free end thereof, to securely retain the guide or support member and the cutting element on the elongate carrier.
  • the spring clip may have one end remote from the pair of end projections or tabs which is releasably attached to an end cap attached to the carrier at the free end thereof.
  • the cutting device may include an end cap attached to the free end of the carrier defining an internal bore and a spring located within the internal bore.
  • the cutting device may also include a longitudinal pin having a tapered surface and a pair of transverse pins also having a tapered surface whereby the tapered surfaces of the longitudinal pin and each transverse pin abut each other when each transverse pin is located in a corresponding notch or groove of the carrier to securely retain the guide or support member and the cutting element on the carrier.
  • the cutting device may include an end fastener at the free end of the carrier which engages with an internal passage of the carrier to provide a force against a bushing surrounding the end fastener to ensure that the cutting disc and guide or support member are securely retained on the carrier.
  • the end fastener may have a screw thread that engages with a complementary screw thread formed on an internal wall of the carrier forming the internal passage.
  • a cutting device including:
  • an elongate carrier having a longitudinal axis, a tool end that can be operatively coupled to a power tool and a free end;
  • the cutting element may be located closely adjacent to the guide or support member.
  • the cutting device may include any one or more of the features of the cutting device defined above according to the first aspect of the invention.
  • the cutting device may include an eccentric cam member defining an internal cavity and an adjustable collar mounted to the carrier and received within the internal cavity of the eccentric cam member, wherein the cutting element is moved in a similar direction to provide a spacing between the guide or support member and the cutting element, which corresponds to a desired wall thickness of a pipe or sheet being cut in use.
  • the adjustable collar may have a screw threaded shank or shaft to which is attached an adjustment nut wherein the shank or shaft extends through a side wall of the eccentric cam member and actuation of the nut causes said movement of the adjustable collar relative to the eccentric cam member having an effective limit governed by abutment of the adjustable collar with end walls of the internal cavity.
  • a cutting blade for use with a cutting device for cutting a work piece, e.g. cutting through a side wall of a pipe or through a sheet, which is mountable to a rotatable carrier or shaft, the blade comprising a cutting element including a plurality of deflector vanes, each deflector vane being located inward from a peripheral edge of the cutting element and the blade defining an aperture therein adjacent to each deflector vane, whereby in use swarf or dust generated by the pipe or shaft being cut is directed by each deflector vane through an adjacent aperture away from a face of a user.
  • the cutting element may be substantially planar and the cutting element may be substantially circular.
  • a guide or support member for use with a cutting device for cutting a workpiece, e.g. a side wall of a pipe or a sheet, which is mountable to a rotatable carrier or shaft in conjunction with a cutting element also mountable to the carrier or shaft, the guide or support member including, a pair of opposed end components and an intermediate assembly of a plurality of pivotable vanes which are each connected at their respective outer ends by a connecting element or strap, whereby each of the vanes is movable from an inner location to an outer location which define inner and outer limits of a transverse dimension of the guide or support member whereby to adjust the diameter of the guide or support member.
  • Each vane may be arcuate and each of the vanes may have a similar curvature having one concave side and an opposed convex side, e.g. when the guide or support member is viewed from one end.
  • Each vane may define a slot and respective outer ends of adjacent connection elements may be capable of sliding displacement in the slot upon pivotal movement of each vane whereby to adjust the diameter of the guide or support member.
  • each vane may be pivotably attached to one or each end component. Further respective inner ends of each vane have an internal aperture for determining the limits of pivotal movement of each vane.
  • a cutting device to cut a work piece which includes the following:
  • the work piece may be a pipe in which case cutting through a side wall of the pipe may comprise extending the cut around the full circumference of the pipe with the guide member rotating along an inner surface of the pipe so that the side wall of the pipe is completely severed from the remainder of the pipe.
  • the longitudinal surface of the carrier may be parallel to and spaced from a longitudinal axis of the pipe.
  • the work piece may be a substantially planar sheet of material.
  • the guide member may rotate counter to the direction of rotation of the cutting element. Instead the guide member may rotate in the same direction as the cutting element but independently thereof and at a slower speed of rotation.
  • a method of cutting a pipe to remove an end region of the pipe including:
  • a rotatable elongate carrier having one end for coupling to a power tool and a guide member rotatably attached thereto towards another end and a cutting element attached to the rotatable carrier in between the guide member and said one end, the cutting element having a greater transverse dimension than the guide member,
  • Rotating the carrier may comprise rotating the carrier and thereby also the blade at high speed by operatively coupling it to a power tool.
  • Displacing the guide member may guide the cutting element around the full circumference of the pipe whereby to cut the pipe through completely and remove the end region of the pipe.
  • Displacing the guide member may comprise displacing it around the pipe surface in a direction that is counter to the direction of rotation of the cutting element.
  • the guide member may include a bearing surface and displacing the guide member may comprise contacting the bearing surface with an internal surface of the side wall of the pipe being cut or an adjacent surface of a sheet being cut.
  • a cutting device for cutting pipes and a method for cutting pipes in accordance with this invention may manifest itself in a variety of forms. It will be convenient to hereinafter describe several embodiments of the invention in detail with reference to the accompanying drawings. The purpose of providing this detailed description is to instruct persons having an interest in the subject matter of the invention how to carry the invention into practical effect. However it is to be clearly understood that the specific nature of this detailed description does not supersede the generality of the preceding broad description.
  • FIG. 1 refers to an assembled view of a first embodiment of a cutting device of the invention
  • FIG. 2 refers to an exploded perspective view of the invention of the cutting device shown in FIG. 1 ;
  • FIG. 3 shows a sectional view of the cutting device of FIG. 1 in use in cutting a pipe and
  • FIG. 4 is a side view of the arrangement shown in FIG. 3 ;
  • FIG. 5 shows an exploded perspective view of a second embodiment of the invention wherein use is made of a compression ring
  • FIGS. 6A , 6 B and 6 C are sectional views of the cutting device shown in FIG. 5 showing the installation of the end cap to the rotatable shaft;
  • FIG. 7 is an exploded perspective view of a third embodiment of the present invention.
  • FIG. 8 is an exploded perspective view of a fourth embodiment of the present invention.
  • FIGS. 9 , 10 and 11 are sectional views of the embodiment shown in FIG. 8 ;
  • FIG. 12 refers to an exploded perspective view of a fifth embodiment of the present invention.
  • FIGS. 13 , 14 and 15 refer to sectional views of the embodiment shown in FIG. 12 ;
  • FIG. 16 refers to an exploded perspective view of a fifth embodiment of the invention.
  • FIGS. 17 , 18 and 19 are sectional view of the embodiment shown in FIG. 16 ;
  • FIG. 20 represents an exploded perspective view of a sixth embodiment of the invention.
  • FIGS. 21 and 22 are sectional view of the embodiment shown in FIG. 20 ;
  • FIG. 23 represents an exploded perspective view of the seventh embodiment of the invention.
  • FIGS. 24 , 25 and 26 represent front views of the embodiment shown in FIG. 23 ;
  • FIG. 27 refers to a front view of the embodiment shown in FIG. 23 with the end cap removed;
  • FIGS. 28 , 29 and 30 represent cutting discs for use in the invention for use in directing dust and swarf away from the user;
  • FIG. 31 represents an exploded perspective view of a modified guide member for use in the invention.
  • FIGS. 32 , 33 , 34 and 35 show the guide wheel of FIG. 31 and the dust extractor cutting disc of FIG. 30 mounted to a rotatable shaft;
  • FIG. 36 shows the cutting apparatus of FIGS. 32 , 33 , 34 and 35 in cutting a flat sheet or panel.
  • reference numeral 10 generally designates an embodiment of a pipe cutting device.
  • the device 10 includes an elongate carrier in the form of a rod or shaft 12 having a proximal end or free end 12 . 2 , and a distal end or tool end 12 . 1 (i.e. engageable by a power tool).
  • a cutting element in the form of a cutting disc 14 is arranged on the rod 12 to be rotatably fast with or fixedly attached to the rod 12 .
  • the cutting disc 14 is arranged closely adjacent to but spaced from a guide member in the form of a guide wheel 16 which is carried rotatably by the rod 12 .
  • the guide wheel 16 is, further, positioned closely adjacent surface 14 . 1 ( FIG. 2 ) of the cutting disc 14 which has a central aperture 19 .
  • An attaching formation in the form of a shank portion 18 is defined at the proximal end 12 . 1 of the rod 12 .
  • the shank portion 18 is received in a gripping element such as a chuck (not shown) of a power tool.
  • the power tool is, for example, a hand drill.
  • a retaining formation in the form of a button 20 is mounted at the distal end 12 . 2 of the rod 12 .
  • a boss 22 is defined adjacent to the button 20 .
  • the boss 22 has a larger diameter than the rod 12 but a smaller diameter than the button 20 .
  • the guide wheel 16 defines a seat or hub 24 within which the button 20 is received to retain the guide wheel 16 on the rod 12 with the guide wheel 16 being carried on the boss 22 .
  • the rod 12 has a threaded portion 26 arranged adjoining the boss 22 .
  • the cutting disc 14 is held captive on the rod 12 by a nut 28 that engages the threaded portion 26 of the rod 12 with a screw thread engagement.
  • the device 10 includes a pair of lock washers 30 .
  • the washers 30 are arranged on opposite sides of the cutting disc 14 and serve to lock the cutting disc 14 to the rod 12 so that the cutting disc 14 , in use, rotates with the rod 12 under the action of the power tool to which the rod 12 is connected.
  • the cutting disc 14 has a diameter which is less than the diameter of a pipe 32 ( FIGS. 3 and 4 ) to be cut.
  • the guide wheel 16 has a diameter which is less than the diameter of the cutting disc 14 .
  • the guide wheel 16 defines a bearing surface 34 which extends parallel to a longitudinal axis of the rod 12 .
  • a peripheral space 36 defined between a cutting edge of the cutting disc 14 and the bearing surface 34 of the guide wheel 16 serves as a depth gauge and facilitates a user cutting the pipe to the required depth as shown in FIG. 4 of the drawings.
  • the cutting disc 14 is any suitable abrasive cutting disc such as a tungsten-carbide disc or a diamond tipped disc.
  • the device 10 is sold as a pre-assembled unit or can be provided as a number of components which can be assembled together, e.g. in kit form, with the rod 12 , the nut 28 , the pair of washers 30 , one or more cutting discs 14 , which may be of different diameters, and one or more guide wheels 16 of different diameters. By having guide wheels of different diameters the depth of cut that can be made with the cutting device can be varied. If the device 10 is provided as a kit, a required size of cutting disc 14 and guide wheel 16 are selected and mounted on the rod 12 .
  • the guide wheel 16 is received on the boss 22 with the button 20 being received in the seat 24 of the cutting wheel 16 .
  • the guide wheel also includes apertures 24 A defined therein for air flow and to reduce the amount of material used in the guide wheel 16 . It also includes a central aperture 24 B which is passed over the rod 12 to mount the guide wheel 16 on the rod 12 .
  • the boss 22 is received within the central aperture 24 B of the guide wheel 16 a loose fit within the guide wheel 16 so that the guide wheel 16 can rotate relative to the rod 12 .
  • the selected cutting disc 14 is mounted on the rod 12 adjacent to the guide wheel 16 and is secured in position by the nut 28 .
  • the combination of the nut 28 being screwed on to the threaded portion 26 with the provision of the lock washers 30 serve to lock the cutting disc 14 to the rod 12 .
  • the disc 14 is fast with the rod 12 and rotates together with the rod 12 .
  • the device 10 is used to cut a pipe 32 below a floor 38 in a building. It is noted that the diameter of the cutting disc 14 is less than the diameter of the pipe 32 to be cut.
  • the power tool (not shown) to which the device 10 has been attached is operated to rotate the rod 12 and the cutting disc 14 attached to the rod 12 .
  • An edge of the cutting disc 14 is placed against an inner surface 40 of the pipe 32 and first cut 42 is made in a wall of the pipe 32 .
  • the cutting disc 14 cuts to a depth governed by the space 36 between the edge of the cutting disc 14 and the bearing surface 34 of the guide wheel 16 .
  • the cutting disc 14 cuts through the wall of the pipe 32 until the bearing surface 34 bears against the internal surface of the pipe 32 as shown in FIG. 4 of the drawings.
  • the guide wheel 16 serves to restrain the device 10 from flying out laterally from the pipe 32 which, but for the presence of the guide wheel 16 , could otherwise occur.
  • the likelihood of the user injuring himself or herself or causing damage to surrounding structure is obviated.
  • the provision of the guide wheel 16 inwardly of the cutting disc 14 serves three functions at least. Firstly, the guide wheel 16 functions as a depth gauge to control the depth of the cut of the wall of the pipe 32 .
  • the guide wheel 34 further serves to assist in the counter-rotational movement of the device 10 about the internal surface 40 of the pipe 32 to form a circumferential cut in the pipe 32 .
  • the guide wheel 16 serves to restrain the device 10 after completion of the cut.
  • a pipe cutting device 10 which enables a user to perform an even, uniform cut which is at right angles to the longitudinal axis of the pipe 32 .
  • the provision of the guide wheel 16 serves as a depth gauge to enable the user to control the depth of the cut.
  • the provision of the guide wheel 16 advantageously serves to assist in rotating the device 10 about the longitudinal axis of the pipe during the cutting operation.
  • the guide wheel 16 also serves to restrain the device 10 against lateral movement beyond the confines of the pipe 32 after completion of the cutting operation 32 .
  • the device 10 could be sold in sets where a rod 12 is provided with various sizes of cutting discs 14 and/or guide wheels 16 .
  • the set could merely have replacement cutting discs 14 so that blunt cutting discs 14 can be replaced by sharp cutting discs 14 .
  • FIGS. 5 , 6 A, 6 B and 6 C there is shown a further embodiment of the invention showing cutting device 10 A which includes similar components as described above using the same reference numerals.
  • an end cap 22 A having an internal groove 22 B for supporting a snap or compression ring 53 made of an elastomeric or flexible material which can be C shaped as shown.
  • a disc 47 which is welded or which is a permanent part of shaft 12 formed by a machining operation.
  • Disc 47 is also provided with keyway 48 and groove 55 which also supports snap ring 53 as shown in FIGS. 6A , 6 B and 6 C.
  • Cutting disc 14 A is provided with central aperture 19 having top and bottom keyways or recesses 49 A.
  • End cap 22 A is also provided with flange 22 C and end wall 54 A.
  • lever aperture 54 There is also provided lever aperture 54 .
  • FIGS. 6A , 6 B and 6 C The process of installing the end cap 22 A on shaft 12 is shown sequentially in FIGS. 6A , 6 B and 6 C and by the arrows in FIG. 6A and 6B .
  • the snap ring 53 is held captive in groove 22 B and as end cap 22 A is pressed onto shaft 12 its tapered lead in surface 56 collides with snap ring 53 .
  • the snap ring 53 will reduce its diameter via physical displacement to a point where the internal diameter of end cap 22 A equals the outside diameter of snap ring 53 .
  • the end cap 22 A can slide onto shaft 12 until snap ring 53 meets with internal groove 22 B.
  • FIGS. 5 and 6A , 6 B and 6 C is useful for cutting device 10 A on pipes or sheets made from different plastics materials such as HDPE or PVC or metals including copper and stainless steel or other materials including ceramics and earthenware.
  • FIG. 7 there is shown another embodiment in relation to cutting device 10 B which has top and bottom projections or keys 50 A on shaft 12 adjacent boss 22 which pass through as is the case with the embodiment of FIG. 5 keyways 51 of washer 30 A and top and bottom keyways or recesses 49 A of keyway 49 . Again this is an example of a quick release coupling initiated by removal of nut 28 .
  • FIGS. 8 , 9 , 10 and 11 Another embodiment is shown in FIGS. 8 , 9 , 10 and 11 showing cutting device 10 C wherein use is made of a spring clip 56 having arms 57 and end projections 58 .
  • a cutting disc 14 C which is attached to shaft 12 having keyways 59 which engage with keys 60 on locking disc 61 .
  • tubular bushing 62 There is also provided tubular bushing 62 .
  • spring clip 56 may be quickly dismantled by use of pliers or a screwdriver (not shown).
  • shaft 12 is provided with a hollow passage 63 for accommodation of spring clip 56 .
  • the spring clip 56 is in the form of a spring steel clip and is designed to provide a force that encapsulates guide wheel 16 and cutting disc 14 C. This is achieved by each of arms 57 being biased inwardly.
  • the clip 56 may be inserted into hollow interior 63 of shaft 12 inside bushing 62 .
  • projections 58 are released the clip 56 may be retained in position inside hollow interior 63 of shaft 12 and hollow passage 64 of shaft 12 as shown with projections 58 engaging in retaining notches 65 as shown in FIG. 11 . This enables the cutting disc 14 A to be fully engaged and securely retained by keys 60 on shaft 12 .
  • cutting device 10 D which has shown a similar arrangement as described above for FIGS. 8-11 using a spring clip 56 A which has arms 57 A and end projections 58 A.
  • Clip 56 A also has aperture 66 for retention of screw 67 .
  • end cap 68 to which spring clip 56 A is attached by retaining screw 67 .
  • End cap 68 also has lever slot 69 in head 70 and shank 71 .
  • a hollow bush 72 with end projections 73 which engage with mating slots 74 in end cap 68 .
  • Bush 72 has flange 75 with keyways 76 which mate with keyways 77 of cutter disc 14 D.
  • Both keyways 76 and 77 mate with keys 78 on disc 79 integral with shaft 12 to provide a positive force between the end cap 68 and the cutting disc 14 D.
  • the locking arms 57 A collide with the tapered lead-in 80 on the shaft 12 as shown in FIGS. 13-14 .
  • the pressing force on the end cap 68 is larger than the combined friction and spring clip 56 A bending forces, the locking arms 57 A begin to displace normal toward the centre axis of the shaft 12 .
  • This surface 83 presses against the shaft bushing 72 which then presses against the cutting disc 14 D providing a positive force that enables the cutting disc 14 D to be fully engaged on the shaft key 78 .
  • An added feature of cutter device 10 D is that as the shaft 12 rotates it is providing a centripetal force to the locking arms 57 A. As this acceleration increases so too does the centripetal force which translates to the tapered wall 84 on the inner groove 81 of the shaft increasing the pressure applied to the cutting disc 14 D, therefore increasing the force required to displace the cutting disc 14 D in its operation as shown in FIG. 15 .
  • FIGS. 16-19 a similar arrangement is shown as in FIGS. 12-15 with the exception that spring clip 56 A is replaced with compression spring 86 , transverse tapered locking pins 87 and end pin 88 .
  • Cutter device 10 E functions to provide a positive force between the end cap 68 and the cutting disc 14 D.
  • the tapered locking pins 87 collide with the tapered lead-in 80 in shaft cavity 82 .
  • the tapered locking pins 87 begin to displace normal toward the centre axis of the shaft 12 .
  • This force is then translated through flat surface 83 of the end cap 68 which is perpendicular to the shaft 12 axis.
  • This end cap surface 83 presses against the shaft bushing 72 when then presses against the cutting disc 14 D providing a positive force that enables the cutting disc 14 D to be fully engaged on the shaft key 78 as shown in FIG. 19 .
  • An added feature of cutter assembly 10 E is that as the shaft 12 rotates it is providing a centripetal force to the locking pins 87 . As this acceleration increases so to does the centripetal force which translates to the tapered wall 84 increasing the pressure applied to the cutting disc 14 D, therefore increasing the force required to displace the cutting disc 14 D whilst in operation.
  • the cutting device 10 F shown in FIGS. 20 , 21 and 22 uses the cutter disc 14 F with the keyways 91 that engage with the keys 78 .
  • a fastener 92 having a shank 93 with a screw thread that engages an internal thread 94 of adjacent end 95 of shaft 12 as shown in FIGS. 21-22 .
  • Fastener 92 also has head 93 A, flange 96 and screwdriver slot 94 .
  • bushing 72 A is also shown.
  • Fastener 92 is used to provide a force that encapsulates the guide wheel 16 and the cutting disc 14 , by means of engaging with internal thread 94 .
  • the fastener 92 when fully engaged provides a force against a shaft bushing 72 A that in turn translates that force to the cutting disc 14 F.
  • This force enables the cutting disc 14 F to fully engage with the key 78 on the shaft 12 and allows the guide wheel 16 to rotate around the longitudinal axis of the shaft 12 freely. This force also prevents the cutting disc 14 F, bushing 72 A and guide wheel 16 from sliding off the shaft 12 .
  • FIG. 22 shows flange 97 of bushing 72 A interposed between cutter disc 14 F and hub 24 of guide wheel 16 .
  • FIG. 23 there is provided cutting device 10 G having an eccentric adjustable cam 100 , an adjustment nut 99 which is mounted on screw threaded shaft 101 of shaft connection collar 102 , an oval shaped aperture 103 for retention of shaft connection collar 102 and a slot 104 .
  • the aperture 103 has opposed end walls 103 A which determine the extent of movement of collar 102 in aperture 103 .
  • an attachment aperture 106 of eccentric adjustable cam 100 There is also shown an attachment aperture 106 of eccentric adjustable cam 100 .
  • the operation of cutting device 106 is shown in FIGS. 24 , 25 and 26 .
  • dust collection vanes 107 for directing dust in use away from the operator of cutting device 10 G.
  • the cutting device 10 G can be used in relation to a variety of wall thicknesses and thus functions as a wall thickness gauge.
  • the operation uses eccentric adjustable cam 100 in combination with guide wheel 16 and cutting disc 14 G being loosely fitted to shaft 12 .
  • eccentric adjustable cam 100 By turning adjustment nut 101 in either direction the centre of shaft axis will change in relation to guide wheel 16 .
  • the shaft axis may move from a central position shown in FIG. 25 to an eccentric position dependent on the number of turns of nut 100 shown in FIGS. 25 and 26 .
  • This eccentricity causes the centre of force to move in relation to guide wheel 16 creating a moment of force around the rotating shaft 12 .
  • This in turn allows the guide wheel 16 to be naturally positioned at the desired gauge of wall thickness independent of the position of cutting disc 10 F as shown in FIGS. 26 and 27 .
  • FIG. 27 there is shown an assembled view of cutting device 10 .
  • the rotating shaft centre 108 and the line of force 109 is perpendicular to the medium being cut.
  • the wall thickness indicated by 110 is shown.
  • FIG. 28 there is shown one form of cutting disc 111 which in operation is of directional design to provide a low pressure vortex to create a vacuum surrounding the cutting disc 111 which is dependent on rotational direction.
  • This cutting disc and its elevated deflectors 113 is effective to draw the dust and swarf 113 A away from the surface of the article being cut and down through apertures 114 adjacent each deflector 113 .
  • This cutting disc 111 is effective in extraction of dust and swarf away from the face of the user.
  • cutting disc 115 which again is of a unidirectional design to provide a low pressure area towards the centre 19 of cutting disc 115 independent of rotational direction. This design is effective to draw dust and swarf away from the article being cut and down through apertures 114 A adjacent deflector vanes 113 A.
  • FIG. 30 there is shown a unidirectional cutting disc 116 which provides a low pressure area close to cutting face 112 independent of rotational direction. This design is effective to draw the dust and swarf away from the surface of the article being cut and through apertures 118 adjacent deflectors 117 and thus away from the face of the user.
  • FIG. 31 there is shown a variable diameter guide wheel 16 A used for controlling depth of cut for cutting devices.
  • Guide wheel 16 A comprises of a top disc component 120 , a bottom disc component 120 A, several vane components 121 and several curved vane connection components 122 .
  • Guide wheel 16 A uses a worm drive 123 that controls the amount of rotation of the top component 120 performs in relations to the bottom component 120 A.
  • the worm drive 123 is actioned the top disc component 120 rotates causing the internal pins 125 that are connected to the top disc component 120 and are held captive in a slot 126 to press against an adjacent surface of the slot 126 .
  • the vane components 121 are also held captive to the bottom disc component 120 A by means of pins 124 which pass through apertures 127 which also act as a pivot point for the vane components 121 .
  • the vane components 121 are able to rotate around the pivot point 127 therefore changing the outside diameter of the vane components 124 .
  • the curved vane connection components 122 are joined to the vane components 121 at mutually adjacent ends via a pin 128 shown in phantom again acting as a pivot point.
  • Each of components 121 and adjacent ends of components 122 are joined by a pin 128 which moves in slot 129 . This slot 129 allows the curved vane connection components 122 to move tangentially to that slot thus maintaining a connection between each vane component 121 .
  • locating projections 130 of bottom disc component 120 A which each locate in mating recesses 131 of top disc component 120 .
  • the worm drive 123 is contained in housing 132 and actioned by a screwdriver (not shown) engaging slots 133 and 134 .
  • FIGS. 32 , 33 , 34 and 35 there is shown the guide wheel 16 A mounted on shaft 12 in combination with dust extraction disc 116 . This is accomplished the use of end cap 68 as shown in FIGS. 33 , 34 and 35 .
  • FIG. 36 there is cutting device 10 H shown in FIGS. 32-35 utilized in cutting a planar panel 136 .
  • the cutting device 10 H has already formed the cutting line 137 shown in the drawings.
  • the guide or support member that is in the form of the guide wheel 16 is located on the other side of the blade 14 to the power end 12 . 1 that is operatively coupled to a power tool.
  • Applicant has found that the cutting device can be mounted in a very stable manner in position on a work piece when the blade is rotating at high speed with this arrangement. Without being bound by theory Applicant believes that this is due to the support provided by the guide wheel on the other side of the blade to the rotational drive imparted by the power tool. This feature results in a much more stable and comfortable operation of the cutting device by the user. It also helps the user to make a much more precise and accurate cut with the power tool. This is important because the cutting device can be used to cut off pipe sections that project above a floor or the like and it is highly desirable that this is done accurately and precisely.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Wood Science & Technology (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Surgical Instruments (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Machine Tool Copy Controls (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Turning (AREA)
US13/388,734 2009-08-03 2010-08-03 Cutting Device Abandoned US20120125168A1 (en)

Applications Claiming Priority (3)

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AU2009203210A AU2009203210A1 (en) 2009-08-03 2009-08-03 Pipe cutting device
AU2009203210 2009-08-03
PCT/AU2010/000981 WO2011014914A1 (en) 2009-08-03 2010-08-03 Cutting device

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US17/746,076 Active US11752653B2 (en) 2009-08-03 2022-05-17 Cutting device
US18/464,471 Pending US20240066741A1 (en) 2009-08-03 2023-09-11 Cutting device

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EP (1) EP2461931B1 (pt)
JP (1) JP5732054B2 (pt)
KR (1) KR20120089641A (pt)
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CA (1) CA2769926A1 (pt)
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CN106799656A (zh) * 2016-12-27 2017-06-06 重庆市健隆家具有限公司 门板打磨装置
US20210101258A1 (en) * 2017-03-31 2021-04-08 Saint-Gobain Abrasives, Inc. Grinding wheel assembly
CN114393733A (zh) * 2021-12-06 2022-04-26 江苏美芝隆机械有限公司 一种切粒机切面压力补偿装置
US11344959B2 (en) 2017-06-09 2022-05-31 Illinois Tool Works Inc. Cutting apparatus including a visual tension indicator mechanism
EP3950224A4 (en) * 2019-03-28 2023-03-15 Biam Alloys Co., Ltd. WHEEL DISC DEVICE, WHEEL CUTTING APPARATUS AND CUTTING METHOD

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JPWO2014142269A1 (ja) * 2013-03-14 2017-02-16 京セラ株式会社 電子機器
KR101617378B1 (ko) 2014-08-27 2016-05-02 박경신 파이프 절단장치
JP2017064823A (ja) * 2015-09-29 2017-04-06 株式会社Ihi 加工装置
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JP2018202577A (ja) * 2017-06-08 2018-12-27 株式会社Ihi 加工装置
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CN108312195B (zh) * 2018-02-26 2023-05-26 蒋丰亮 一种用于pe大口径纤维增强管道的管道端口回转切割机
CN108538756B (zh) * 2018-03-23 2019-11-22 胡佳威 一种片式半导体封装装置
JP6383125B1 (ja) * 2018-04-11 2018-08-29 パイプシール株式会社 パイプカッター
CN110576215A (zh) * 2018-07-23 2019-12-17 蓝思精密(东莞)有限公司 管材切割设备及切割方法
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US20210101258A1 (en) * 2017-03-31 2021-04-08 Saint-Gobain Abrasives, Inc. Grinding wheel assembly
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CN114393733A (zh) * 2021-12-06 2022-04-26 江苏美芝隆机械有限公司 一种切粒机切面压力补偿装置

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CN102481643A (zh) 2012-05-30
ZA201201305B (en) 2012-10-31
EP2461931B1 (en) 2017-02-22
AU2009203210A1 (en) 2011-02-17
US11752653B2 (en) 2023-09-12
EP2461931A1 (en) 2012-06-13
US20220274280A1 (en) 2022-09-01
AU2010206102C1 (en) 2011-07-07
RU2012109008A (ru) 2013-09-10
BR112012002458A2 (pt) 2019-09-24
CA2769926A1 (en) 2011-02-10
KR20120089641A (ko) 2012-08-13
AU2010206102B2 (en) 2011-03-17
EP2461931A4 (en) 2015-09-09
SG178244A1 (en) 2012-03-29
AU2012101642A4 (en) 2012-12-20
JP5732054B2 (ja) 2015-06-10
AU2010206102A1 (en) 2011-02-17
WO2011014914A1 (en) 2011-02-10
MX2012001570A (es) 2012-06-27
JP2013500871A (ja) 2013-01-10
AU2012101642B4 (en) 2013-07-18
US20240066741A1 (en) 2024-02-29

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