US20140076115A1 - Method and apparatus for cutting one or more grooves in a cylindrical element - Google Patents

Method and apparatus for cutting one or more grooves in a cylindrical element Download PDF

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Publication number
US20140076115A1
US20140076115A1 US13/841,732 US201313841732A US2014076115A1 US 20140076115 A1 US20140076115 A1 US 20140076115A1 US 201313841732 A US201313841732 A US 201313841732A US 2014076115 A1 US2014076115 A1 US 2014076115A1
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United States
Prior art keywords
finish
rough
start position
cutter
cylindrical element
Prior art date
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Abandoned
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US13/841,732
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English (en)
Inventor
Gerald Ashley Lee
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.)
OMOTION Inc
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Homerun Holdings Corp
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Filing date
Publication date
Application filed by Homerun Holdings Corp filed Critical Homerun Holdings Corp
Priority to US13/841,732 priority Critical patent/US20140076115A1/en
Assigned to HOMERUN HOLDINGS CORPORATION reassignment HOMERUN HOLDINGS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, GERALD ASHLEY
Priority to EP13837043.2A priority patent/EP2895036B1/en
Priority to CA3020098A priority patent/CA3020098C/en
Priority to CA2884098A priority patent/CA2884098C/en
Priority to BR112015005201A priority patent/BR112015005201A2/pt
Priority to PCT/US2013/060205 priority patent/WO2014043713A1/en
Priority to CN201380048357.0A priority patent/CN104684441B/zh
Priority to JP2015532153A priority patent/JP6238320B2/ja
Priority to AU2013315024A priority patent/AU2013315024B2/en
Publication of US20140076115A1 publication Critical patent/US20140076115A1/en
Assigned to OMOTION INCORPORATED reassignment OMOTION INCORPORATED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: HOMERUN HOLDINGS CORPORATION
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/24—Tool holders for a plurality of cutting tools, e.g. turrets
    • B23B29/26—Tool holders in fixed position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H1/00—Curtain suspension devices
    • A47H1/02—Curtain rods
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H13/00—Fastening curtains on curtain rods or rails
    • A47H13/02—Fastening curtains on curtain rods or rails by rings, e.g. with additional runners
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H23/00—Curtains; Draperies
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H5/00—Devices for drawing draperies, curtains, or the like
    • A47H5/02—Devices for opening and closing curtains
    • A47H5/06—Devices with screw-threads on rods or spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B3/00—General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/08—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning axles, bars, rods, tubes, rolls, i.e. shaft-turning lathes, roll lathes; Centreless turning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/72—Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
    • B23Q1/76—Steadies; Rests
    • B23Q1/766—Steadies or rests moving together with the tool support
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/40—Roller blinds
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • E06B9/72—Operating devices or mechanisms, e.g. with electric drive comprising an electric motor positioned inside the roller
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H1/00—Curtain suspension devices
    • A47H1/02—Curtain rods
    • A47H2001/0215—Curtain rods being tubular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2215/00—Details of workpieces
    • B23B2215/72—Tubes, pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2220/00—Details of turning, boring or drilling processes
    • B23B2220/12—Grooving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2220/00—Details of turning, boring or drilling processes
    • B23B2220/44—Roughing
    • B23B2220/445—Roughing and finishing
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • 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
    • Y10T82/00—Turning
    • Y10T82/10—Process of turning

Definitions

  • Embodiments of the invention relate to cutting one or more grooves in a cylindrical element.
  • U.S. Pat. No. 4,125,057 (Cox) teaches a motor driven milling and boring machine used primarily for forming screw threads of any selected pitch, external to cylindrical or conic projection or within similar-shaped bore of workpiece, particularly workpieces such as are too large or irregular-shaped to be themselves rotated.
  • a second or planetary tracking motor jointly operates a pair of selectively coupled ring gears of the housing, which in conjunction with a master nut fixed along the housing axis, move the hanger respectively annularly and axially so that the distal cutter may follow a helical path, the pitch of which path is determined by the chosen velocity ratio give the two ring gears.
  • a particular velocity ratio results from the choice of gearing assembled in a detachable twin-segment gear train cassette insertable between the pair of ring gears. While remaining in place, the gear train may be disengaged from one drive component of the hanger to enable arcuate resetting for production of multi-start threads, or alternately to provide annular or linear movement of the cutter.
  • a collar-shaped electromagnetic support base has associated tactile means for centering it, and hence centering the milling machine subsequently mounted thereupon, relative to the preformed bore of a workpiece which is to be threaded.
  • Radial thrust-retraction means are provided for quick-withdrawal of a cutter head from a workface so that it can then be lifted out of a bore without retracing the helical entrance path.
  • U.S. Pat. No. 4,212,568 (Minicozzi) teaches a rotary cutting tool blank comprising a cutting portion having a longitudinal axis and a plurality of teeth extending the length of said cutting portion, with each of the teeth having a cutting face and a trailing face and a land surface bridging the cutting and trailing faces.
  • the land surfaces are interrupted by a plurality of spaced transverse depressions of relatively large radius arcuate cross section to form a plurality of cutting edge portions at the junction of the cutting face and the uninterrupted portions of the land surface.
  • the cutting edge portions have a positive rake angle, and the trailing and cutting faces of each tooth have surfaces which undulate generally sinusoidally from one end of the cutting portion to the other so that the rake angle of each cutting edge portion varies continuously along its length.
  • the cutting tool blank can be transformed to a cutting tool ready for use simply by suitably relieving the land surfaces to form cutting edges at the aforementioned cutting edge portions.
  • U.S. Pat. No. 4,996,861 (Kellum) teaches an apparatus including an externally threaded spindle to which one end of a thin walled metal tube is detachably secured. The spindle is rotated to wind the tube into the external thread, thereby producing a helix. As the tube is wound onto the spindle, it is pressed into the thread grooves by an auxiliary roller.
  • U.S. Pat. No. 5,263,381 (Shirai) teaches a ball screw comprising a threaded rod and a ball nut making a rectilinear motion around the rod as the rod is rotated.
  • a first load ball groove and a second load groove which have an offset relation to each other are formed in the inner surface of the ball nut.
  • a pre-load is imparted to ball bearings rolling in these two load grooves.
  • the ball nut has a resilient portion between the first and second load ball grooves. The resilient portion can be displaced axially. Any excessive pre-load created by the error introduced either in the lead of the ball-rolling groove or in the lead of the first or second load ball groove is absorbed by the resilient portion. Consequently, the novel ball screw is superior in accuracy to the prior art ball screw, and is easier to fabricate.
  • U.S. Pat. No. 5,775,187 (Nikolai et al) teaches a method of machining and a tool is used for obtaining patterns in the form of alternating ridges, pads, cells, and ridges of a triangular cross section on the surface of a blank.
  • the method facilitates selection of the geometrical parameters of the tool and the machining mode for the tool to obtain alternating ridges and depressions with parallel sides of the profile at predetermined intervals and predetermined heights and angles of slope.
  • the width of the space between projections can be varied in the range of millimeters and micrometers.
  • U.S. Pat. No. 5,971,045 (Watanabe) teaches a veneer lathe comprising a knife ( 2 ) for peeling a log ( 1 ), which is secured rotatably to a knife stock, and a roller bar ( 3 ) disposed to press a circumferential surface of the log ( 1 ) at an upstream side, in relative to said knife ( 2 ), of a rotational direction of the log ( 1 ).
  • the roller bar ( 3 ) has a diameter of not more than 30 mm, and is provided on the circumferential surface thereof with a large number of projections ( 5 ) whose height is not higher than the circumferential surface of the roller bar ( 3 ).
  • the roller bar ( 3 ) is sustained in a sliding bearing ( 9 ) and adapted to receive a rotational force from a driving source.
  • the roller bar ( 3 ) functions not only as a pressure bar but also as a power transmitting media to rotate the log ( 1 ), thereby preventing the generation of lathe check of veneer to be produced.
  • U.S. Pat. No. 6,186,756 (Kojima) teaches a rotor 1 forming screw teeth projectingly provided at its outer end 2 on the axis thereof with a center shaft 3 .
  • the center shaft 3 is provided at its outer end 4 with a smaller-diameter shaft 5 or a concaved fitting hole.
  • a separate rotor shaft 6 which is to be fitted over the smaller-diameter shaft 5 or fitted into the concaved fitting hole is provided with another concaved fitting hole 7 or smaller-diameter shaft.
  • a metal shaft around which synthetic resin is molded is formed at its peripheral surface with a spiral groove or corrugated groove in the opposite revolutional direction with respect to the revolutional direction of the screw rotor.
  • the spiral groove is formed with smooth arc curved line connecting profiles of adjacent grooves.
  • the shaft is provided with a step, and synthetic resin is molded around the shaft surface to form a screw rotor.
  • U.S. Pat. No. 6,289,595 (Galestien) teaches the determination of the complete two-dimensional axial cross section of internal and external screw threads and similar workpieces, wherein in a plane through the centerline of the workpiece, two screw thread profiles which are located diametrically opposite each other are measured through two two-dimensional scan measurements in this plane or through arithmetic construction based on two profile depth measurements with a measuring ball or measuring wire, further on the basis of the assumption that the screw thread profiles in question further have a known dimension and geometry, whereafter these two opposite profiles are linked to each other by performing one or more linked measurements such as, for instance, the outside diameter in the case of external screw thread and the core diameter in the case of internal screw thread. If a proper concentricity of the core diameter, the outside diameter and flank diameter is involved, it may suffice to measure or scan only one profile and one or more linked measurements.
  • U.S. Pat. No. 7,849,769 (Akiyama) teaches a precision roll turning lathe which can form a pattern including three-dimensionally shaped portions, such as three-sided pyramids, on the surface of a roll, with high accuracy.
  • a tool post is provided with a tool turning axis (A axis) which is used to turn a tool such that, when forming a spiral groove cut through the roll, a cutting face of a tip of the tool is oriented perpendicular to a direction along which the spiral groove extends.
  • a axis tool turning axis
  • U.S. Pat. No. 8,308,463 (Kataoka) teaches providing a screw rotor including a resin rotor formed around a metallic shaft without generation of cracks. Spiral chamfers are formed on surfaces of metallic shafts around which resin rotors are formed. Preferably the surfaces of the shafts may be sandblasted, and after the surfaces of the shafts are preliminarily coated with resin and then the rotors may be molded.
  • the prior art teaches several methods to form helical or spiraling grooves in or on the outer surface of a shaft or tube. Some of these methods are complicated and time consuming ways of forming or machining the grooves. Accordingly, there is a need for a method and apparatus for more efficiently and/or more accurately machining grooves in an outer surface of a cylindrical shaft or tube.
  • Embodiments of the subject invention relate to a method and apparatus for cutting one or more grooves in a cylindrical element.
  • the one or more grooves are cut into an outer surface of the cylindrical element.
  • the cylindrical element can be solid, or can have one or more hollow portions.
  • the cylindrical element is a hollow tube.
  • Embodiments also pertain to a cylindrical element having one or more grooves cut in an outer surface of the cylindrical element.
  • a specific embodiment involves machining two grooves, 180 degrees apart, around the outer surface of a cylindrical shaft or tube with a right hand, or clockwise, twist, and/or two grooves, 180 degrees apart, around the outer surface of the cylindrical shaft or tube with a left hand, or counter clockwise, twist.
  • Specific embodiments of the subject method and apparatus can incorporate one or more of the following features: machining multiple single direction (right hand or left hand) grooves in the shaft or rod at the same time; machining two grooves using two single point tools spaced a distance 1 ⁇ 2 the length of the lead; machining a groove using multiple single point tools where each single point tool machines a portion of the groove, such as a single point tool machining a rough cut depth and a further single point tool machining a finish cut depth; machining multiple right hand, or clockwise, grooves in one pass along the shaft or tube and, optionally, machining multiple left hand, or counter clockwise, grooves using an opposite directional single pass along the shaft or tube, where if more than one single point tool is used for each groove, the positions of the rough cut depth tools and the finish cut depth tools are reversed between the pass and the opposite directional pass; machining two grooves in each direction within two minutes for a ten foot shaft or tube; minimum set up time; machining either multiple grooves in a single direction or multiple groove in two
  • FIG. 1 is a perspective view of an apparatus for cutting one or more grooves in a cylindrical element, where the apparatus is cutting a unidirectional set of grooves.
  • FIG. 2 is an enlarged perspective view of the embodiment shown in FIG. 1 .
  • FIG. 3 is an enlarged top view of the embodiment shown in FIG. 1 , showing the tool holder, with a portion of a cylindrical tube shown with a cutaway in order to show the placement of the tools.
  • FIG. 4 is a perspective view of the apparatus of FIG. 1 , where the apparatus is cutting bidirectional sets of grooves.
  • FIG. 5 is an enlarged perspective view of the embodiment shown in FIG. 4 .
  • FIG. 6 is an enlarged top view of the tool holder, with a portion of a cylindrical tube shown with a cutaway in order to show the placement of the tools.
  • FIG. 7 shows a unidirectional pair of grooves cut in a cylindrical tube in accordance with an embodiment of the subject invention.
  • FIG. 8 is an enlarged end view of the cylindrical tube of FIG. 7 .
  • FIG. 9 shows two bidirectional pairs of grooves cut in a cylindrical tube in accordance with an embodiment of the subject invention.
  • FIG. 10 is an enlarged end view of the cylindrical tube of FIG. 9 .
  • FIG. 11A shows an embodiment of a prior art bit or tool.
  • FIG. 11B shows an embodiment of a bit or tool in accordance with a specific embodiment of the subject invention.
  • FIG. 11C shows an embodiment of a bit or tool in accordance with a specific embodiment of the subject invention.
  • FIGS. 12A , 12 B, and 12 C show an embodiment of a tool holder that incorporates two rows of tools.
  • Embodiments of the subject invention relate to a method and apparatus for machining one or more grooves on an outer surface of a cylindrical element.
  • rod or shaft can refer to a solid cylindrical object that may be made of a single material or multiple materials, and may be homogeneous or may be inhomogeneous, such as having layers or changes in materials, densities, and/or other material properties, along the length of the cylinder and/or as a function of radius and/or rotational position with respect to the longitudinal axis of the cylindrical element.
  • the term tube can refer to a hollow cylindrical element that can have one or more features cut into or on an inner surface of the hollow passageway through the hollow cylindrical element.
  • cylindrical elements can also be machined in accordance with embodiments of the subject invention, including, but not limited to, cylindrical elements having one or more partial or full bores through the cylindrical elements, and/or one or more features cut into or on an outer surface of the cylindrical element.
  • Specific embodiments relate to machining a single spiraling groove or multiple spiraling grooves.
  • the grooves may all have the same handedness, or may differ in handedness.
  • Embodiments having two grooves are provided as an example to teach certain features of various embodiments, where embodiments having a single groove to machine more than two grooves, or alternatively, a single groove.
  • FIGS. 1-3 an embodiment of an apparatus set up for cutting a pair of spiraling grooves 12 on a rod or tube 1 is shown, with the rod or tube 1 placed and secured on a lathe 10 .
  • the handedness of the grooves 12 can be right handed (clockwise) or left handed (counterclockwise).
  • the handedness of the grooves, for a certain rotational direction of the rod or tube, can be selected by the directional engagement of the directional lever 7 , where the directional lever controls the direction the cutting tool moves with respect to the rotating cylindrical element.
  • the traversing speed of the tool post 5 is set by one of the speed adjusters, which, for a given rotation speed and cylinder radius, will also set the traversing lead of the groove 12 , where the traversing lead is the angle the groove 12 makes with respect to an axis parallel to the longitudinal axis of the cylindrical element.
  • Lever 6 is used to engage the lead screw, which is geared to the chuck or spindle to generate the desired lead.
  • the groove cutting tools 11 are secured in the tool holder 9 on the tool post 5 .
  • the rod or tube 1 is placed in the chuck 8 of the lathe 10 .
  • a vertical backup roller 4 is placed against the top surface of the rod or tube 1 and a horizontal back up roller 3 is placed against the back side of the rod or tube 1 to support the rod while the grooves 12 are cut, as known in the art.
  • the tool 11 cutting depth can be set differently for each set of tools 11 , as shown in FIG. 3 . While several settings can be used, in the shown embodiment the first, or rough, cutter cuts into the cylindrical element to an initial depth, which is more than half of the total groove depth, and the last, or finish, cutter cuts further into the cylindrical element to deepen the groove 12 .
  • the rough cutter cuts into the cylindrical element more than the finish cutter in this embodiment, in other embodiments the finish cutter can cut more than half of the groove's depth.
  • the top of the cutter which can be flat is perpendicular to a plane tangent to the drive element at the point of contact between the cutter and the drive element.
  • the cylindrical element is rotating such that the top surface of the cylindrical element is coming out of the page, and the tool post 5 is moving from right to left with respect to the element 1 .
  • the rough cuts (on left in FIG. 3 ) are 0.030 inches deep, while the finish cut (on right in FIG. 3 ) adds an additional 0.010 inches of depth to the groove for a final groove depth of 0.040 inches.
  • the two rough cutters are spaced one-half of a lead from each other and the two finish cutters are spaced one-half of a lead from each other, such that the two grooves are spaced 180°, or one-half of a lead, apart, where a lead is defined as the linear distance along the axis of the shaft or tube that is covered by one 360° rotation of the groove.
  • Any number of cutters can be used to cut each groove, but to avoid two passes of the tool post 5 down the rotating element when two cutters (e.g., rough and finish) are used for each groove, two cutters are needed for each groove.
  • the embodiment shown in FIG. 3 produces a pair of spiraling grooves as shown in FIGS. 7-8 .
  • the two grooves are spaced 180°, or one-half of a lead, apart, but other embodiments have spacing greater than or less than 180°.
  • FIGS. 4-6 the apparatus from FIGS. 1-3 is shown being used for cutting two opposing pairs of spiraling grooves 12 on a rod or tube, with the rod or tube 1 still in place and secured on a lathe 10 and the tool post 5 traveling in the other direction after the first pair of grooves were finished.
  • FIG. 1 shows the point where a little less than half the length of the first pair of grooves have been cut and the tool post 5 is moving from right to left.
  • the vertical backup roller 4 is again placed against the top surface of the rod or tube 1 and a horizontal roller 3 is placed against the back side of the rod or tube 1 to support the rod while the grooves 12 having the opposite handedness of the pair of grooves shown being cut in FIG. 3 are cut, as known in the art.
  • the grooves 12 of opposite handedness can be cut over (intersecting) the original grooves 12 by switching the rough cutter tool holder 9 (e.g., 9 R in FIGS. 2 and 3 ) and the finish cutter tool holder 9 (e.g., 9 F in FIGS. 2 and 3 ) and reversing the directional lever 6 such that the tool post 5 is moved in the opposite direction with respect to the rotating cylindrical element as when the original grooves were cut.
  • the traversing speed of the tool post 5 can remain the same as during the first pass and the rotation speed of the cylindrical element can remain the same as during the first pass, such that the traversing lead stays the same.
  • the cutting depth of the groove cutting tools 11 can be changed, such that cutters set to the rough depth on the first pass ( 11 A and 11 B in 9 R in FIG. 3 ) are set to the finish depth on the second pass ( 11 A and 11 B in 9 F in FIG. 6 ) and the cutters set to the finish depth on the first pass ( 11 A and 11 B in 9 F in FIG. 3 ) are set to the rough depth on the second pass ( 11 A and 11 B in 9 R in FIG.
  • FIGS. 7-8 there are four cutters with the first two cutters making a rough depth cut set at a rough depth and the finish cutters cutting farther into the groove to the final depth.
  • the rough cut is 0.030 inches deep while the finish cut cuts an additional 0.010 inches resulting in a depth of 0.04 inches for the groove.
  • the two rough cutters are spaced one-half a lead from each other and the two finish cutters are spaced one-half of a lead from each other.
  • any number of cutters can be used, but to avoid needing two passes of the tool post 5 down the rotating element when two tools are used for each groove, two rough cutters and two finish cutters are needed.
  • four cutters are needed to accomplish the four grooves in two passes. This produces two opposing pairs of spiraling grooves as shown in FIGS. 9-10 .
  • the grooves are spaced 180° apart, as measured around the perimeter of the rod, but other embodiments having spacing greater than or less than 180° are contemplated.
  • embodiments of the subject tool holder ensure such spacing is consistent.
  • a 4.0′′ lead works well in relation to speeds and feed capability of the curtain, but other leads are also utilized.
  • An embodiment has a tolerance of +/ ⁇ 0.12′′ on the pitch, which is based on the feed speed of the machine (lathe) cutting the grooves and should be very consistent.
  • the groove radius can be based on a 0.125 Radius tool, by using a machining center to cut the groove and a 1 ⁇ 4′′ ball end mill. In embodiments using a lathe, different cutters are used.
  • the actual finished shape of the groove is approximately a true radius at 0.118′′. Different tools can be used for each cut on the tube such that the finished groove is 0.118 Radius.
  • the tolerances for the groove depth are +/ ⁇ 0.010′′.
  • FIG. 11A shows a perspective view of a stock bit, or tool, 11 used to cut a portion of an outer surface or a tube or shaft to create a groove in the outer surface of the tube or shaft, where the angle ⁇ that the bit's front portion ball 13 , which faces the outer surface of the tube or shaft, make with respect to a line 14 perpendicular to the top surface 15 at the bit 11 .
  • the angle ⁇ for a specific stock bit 11 is approximately 11°.
  • FIG. 11B shows an embodiment of bit 11 that can be utilized to cut a portion of a groove 12 in accordance with an embodiment of the subject invention, which has an ⁇ >30°.
  • FIG. 11C shows an embodiment of a bit 11 in accordance with the subject invention having an angle ⁇ of 45°.
  • Specific embodiments of the invention can utilize bits 11 having an angle ⁇ >15°, ⁇ >20°, ⁇ >25°, ⁇ >30°, ⁇ >35°, ⁇ >40°, ⁇ >45°, 15°> ⁇ >20°, 20°> ⁇ >25°, 25°> ⁇ >30°, 30°> ⁇ >35°, 35°> ⁇ >40°, and/or 40°> ⁇ >45°.
  • Various embodiments can utilize rough cutter bits and finish cutter bits that are the same or different, two cutter bits for two grooves that are the same or different, in shape, size, material, or other properties.
  • FIGS. 12A , 12 B, and 12 C show an embodiment of a tool holder 9 that incorporates two rows of tools 11 , a top row that has tools 11 for cutting grooves in a tube or shaft where the tool holder 9 is moved right to left with respect to the rotating tube or shaft, and a bottom row that has tools 11 for cutting grooves in a tube or shaft where the tool holder 9 is moved left to right with respect to the rotating tube or shaft, where for both the top row and bottom row, rough cutters start cutting the grooves and finish cutters finish the grooves.
  • FIGS. 12A , 12 B, and 12 C show an embodiment of a tool holder 9 that incorporates two rows of tools 11 , a top row that has tools 11 for cutting grooves in a tube or shaft where the tool holder 9 is moved right to left with respect to the rotating tube or shaft, and a bottom row that has tools 11 for cutting grooves in a tube or shaft where the tool holder 9 is moved left to right with respect to the rotating tube or shaft, where for both the top
  • 12A-12C incorporates 5 pairs of cutters where each pair, having a left cutter and a right cutter, cuts further than the adjacent pair, and the five left cutters of the five pairs cuts a first groove and the five right cutters of the five pairs cuts a second groove, and the top row cuts a pair of grooves of a first handedness and the bottom row cuts a pair of grooves of the opposite handedness.
  • Embodiments of the invention are directed to a method and apparatus for cutting one or more grooves into an outer surface of a cylindrical element.
  • a specific embodiment, which can be referred to as Embodiment 1, involves:
  • finish cutter moves from a finish start position to a finish end position, where the finish start position has a finish axial start position along the length of the cylindrical element and a finish rotational start position about the longitudinal axis, where the finish end position has a finish axial end position along a length of the cylindrical element and a finish rotational end position about the longitudinal axis;
  • cutting away the rough portion and cutting away the finish portion creates a groove in the outer surface of the cylindrical element.
  • Moving the cutters and the rotating element can be accomplished by rotating the element in place and moving the cutters along the outer surface of the rotating element, holding the cutters in place and moving the rotating element, or moving both the cutters and the rotating element.
  • the rough cutter and finish cutter can be started at the same rotational positions or at different rotational positions, these rotational positions can remain the same as the cutters and rotating element are moved relative to each other, or can vary, and the speed of such relative movement can vary or be constant.
  • the rotating element can be rotated at a constant rotational speed or the rotational speed can vary while the rotating element and cutters move with respect to each other.
  • the cutters can remain in constant contact with the outer surface of the rotating element or can be disengaged from contact with the outer surface, the cutters can cut to a constant depth when engaged with the outer surface or the depth can vary while engaged with the outer surface, the rough cutter and the finish cutter can move at the same speed or different speed and such speeds can be constant or vary.
  • embodiments using two rough cutters and/or two finish cutters can have the rough cutters and/or the finish cutters move at the same speed or different speeds, during the relative motion of the rotating element and the cutters. Two passes can be made in the same direction or in opposite directions, as desired.
  • the cylinder can be rotated in either direction, with an appropriate position of the cutters.
  • the finish axial start position is axially separated from the rough axial start position by n leads, where a lead is an axial distance covered by one 360° rotation of the groove in the outer surface of the cylindrical element and n is an integer having a value of 1 or greater. This allows the finish cutter to cut further into the groove started by the rough cutter.
  • the rough rotational end position is the same as the rough rotational start position
  • the finish rotational end position is the same as the finish rotational start position
  • the finish rotational start position is the same as the rough rotational start position
  • rotating the cylindrical element comprises rotating the cylindrical element at a constant speed of rotation
  • moving the rough cutter from the rough start position to the rough end position comprises moving the rough cutter from the rough start position to the rough end position at a first axial speed
  • the first axial speed is a constant axial speed
  • moving the finish cutter from the finish start position to the finish end position comprises moving the finish cutter from the finish start position to the finish end position at the first axial speed
  • the finish axial start position is axially separated from
  • Embodiment six incorporating the limitations of Embodiment 1, while rotating the cylindrical element about the longitudinal axis, further incorporating:
  • Embodiment seven relates to a method and apparatus for cutting two grooves into an outer surface of a cylindrical element, involving:
  • first cutter moves from a first start position to a first end position, where the first start position has a first axial start position along a length of the cylindrical element and a first rotational start position about the longitudinal axis, where the first end position has a first axial end position along a length of the cylindrical element and a first rotational end position about the longitudinal axis;
  • the first rotational end position is the same as the first rotational start position
  • the second rotational end position is the same as the second rotational start position
  • the second rotational start position is the same as the first rotational start position
  • rotating the cylindrical element comprises rotating the cylindrical element at a constant speed of rotation
  • moving the first cutter from the first start position to the first end position comprises moving the first cutter from the first start position to the first end position at a first axial speed
  • the first axial speed is a constant axial speed
  • moving the second cutter from the second start position to the second end position comprises moving the second cutter from the second start position from the second start position
  • aspects of the invention such as controlling the transverse, and proximity to the rotating cylindrical element, of the tool box 5 , and the rotation of the cylindrical element, may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer.
  • program modules include routines, programs, objects, components, data structures, etc., that perform particular tasks or implement particular abstract data types.
  • program modules include routines, programs, objects, components, data structures, etc., that perform particular tasks or implement particular abstract data types.
  • the invention may be practiced with a variety of computer-system configurations, including multiprocessor systems, microprocessor-based or programmable-consumer electronics, minicomputers, mainframe computers, and the like. Any number of computer-systems and computer networks are acceptable for use with the present invention.
  • embodiments of the present invention may be embodied as, among other things: a method, system, or computer-program product. Accordingly, the embodiments may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware. In an embodiment, the present invention takes the form of a computer-program product that includes computer-useable instructions embodied on one or more computer-readable media.
  • Computer-readable media include both volatile and nonvolatile media, transitory and non-transitory, removable and nonremovable media, and contemplate media readable by a database, a switch, and various other network devices.
  • computer-readable media comprise media implemented in any method or technology for storing information. Examples of stored information include computer-useable instructions, data structures, program modules, and other data representations.
  • Media examples include, but are not limited to, information-delivery media, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile discs (DVD), holographic media or other optical disc storage, magnetic cassettes, magnetic tape, magnetic disk storage, and other magnetic storage devices. These technologies can store data momentarily, temporarily, or permanently.
  • the invention may be practiced in distributed-computing environments where tasks are performed by remote-processing devices that are linked through a communications network.
  • program modules may be located in both local and remote computer-storage media including memory storage devices.
  • the computer-useable instructions form an interface to allow a computer to react according to a source of input.
  • the instructions cooperate with other code segments to initiate a variety of tasks in response to data received in conjunction with the source of the received data.
  • the present invention may be practiced in a network environment such as a communications network.
  • a network environment such as a communications network.
  • Such networks are widely used to connect various types of network elements, such as routers, servers, gateways, and so forth.
  • the invention may be practiced in a multi-network environment having various, connected public and/or private networks.
  • Communication between network elements may be wireless or wireline (wired).
  • communication networks may take several different forms and may use several different communication protocols. And the present invention is not limited by the forms and communication protocols described herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Transmission Devices (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Milling Processes (AREA)
  • Blinds (AREA)
US13/841,732 2012-09-17 2013-03-15 Method and apparatus for cutting one or more grooves in a cylindrical element Abandoned US20140076115A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US13/841,732 US20140076115A1 (en) 2012-09-17 2013-03-15 Method and apparatus for cutting one or more grooves in a cylindrical element
AU2013315024A AU2013315024B2 (en) 2012-09-17 2013-09-17 Rotatable drive element for moving a window covering
BR112015005201A BR112015005201A2 (pt) 2012-09-17 2013-09-17 conjunto e sistema de cobertura de janela; método de corte de uma ou mais ranhuras em uma superfície externa de um elemento cilíndrico; e elemento cilíndrico tendo uma ou mais ranhuras em uma superfície externa do elemento cilíndrico
CA3020098A CA3020098C (en) 2012-09-17 2013-09-17 Rotatable drive element for moving a window covering
CA2884098A CA2884098C (en) 2012-09-17 2013-09-17 Rotatable drive element for moving a window covering
EP13837043.2A EP2895036B1 (en) 2012-09-17 2013-09-17 Rotatable drive element for moving a window covering
PCT/US2013/060205 WO2014043713A1 (en) 2012-09-17 2013-09-17 Rotatable drive element for moving a window covering
CN201380048357.0A CN104684441B (zh) 2012-09-17 2013-09-17 用于移动窗户覆盖物的可旋转式驱动元件
JP2015532153A JP6238320B2 (ja) 2012-09-17 2013-09-17 窓カバーを移動させる回転可能な駆動要素

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261702093P 2012-09-17 2012-09-17
US13/841,732 US20140076115A1 (en) 2012-09-17 2013-03-15 Method and apparatus for cutting one or more grooves in a cylindrical element

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US20140076115A1 true US20140076115A1 (en) 2014-03-20

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US13/841,732 Abandoned US20140076115A1 (en) 2012-09-17 2013-03-15 Method and apparatus for cutting one or more grooves in a cylindrical element
US13/842,586 Active 2033-07-16 US9095907B2 (en) 2012-09-17 2013-03-15 Drapery tube incorporating batteries within the drapery tube, with a stop for facilitating the loading and unloading of the batteries
US13/843,617 Abandoned US20140076505A1 (en) 2012-09-17 2013-03-15 Method and apparatus for linked horizontal drapery panels having varying characteristics to be moved independently by a common drive system
US14/029,210 Active US9095908B2 (en) 2012-09-17 2013-09-17 Rotatable drive element for moving a window covering
US14/719,438 Active US9615687B2 (en) 2012-09-17 2015-05-22 Rotatable drive element for moving a window covering
US15/439,071 Active US10874242B2 (en) 2012-09-17 2017-02-22 Rotatable drive element for moving a window covering

Family Applications After (5)

Application Number Title Priority Date Filing Date
US13/842,586 Active 2033-07-16 US9095907B2 (en) 2012-09-17 2013-03-15 Drapery tube incorporating batteries within the drapery tube, with a stop for facilitating the loading and unloading of the batteries
US13/843,617 Abandoned US20140076505A1 (en) 2012-09-17 2013-03-15 Method and apparatus for linked horizontal drapery panels having varying characteristics to be moved independently by a common drive system
US14/029,210 Active US9095908B2 (en) 2012-09-17 2013-09-17 Rotatable drive element for moving a window covering
US14/719,438 Active US9615687B2 (en) 2012-09-17 2015-05-22 Rotatable drive element for moving a window covering
US15/439,071 Active US10874242B2 (en) 2012-09-17 2017-02-22 Rotatable drive element for moving a window covering

Country Status (8)

Country Link
US (6) US20140076115A1 (enExample)
EP (1) EP2895036B1 (enExample)
JP (1) JP6238320B2 (enExample)
CN (1) CN104684441B (enExample)
AU (1) AU2013315024B2 (enExample)
BR (1) BR112015005201A2 (enExample)
CA (2) CA2884098C (enExample)
WO (3) WO2014043711A1 (enExample)

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US9615687B2 (en) 2017-04-11
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AU2013315024B2 (en) 2018-08-02
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CA2884098C (en) 2018-11-20
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US20140076508A1 (en) 2014-03-20
US20150272370A1 (en) 2015-10-01

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