US20050115293A1 - Thread rolling tool - Google Patents
Thread rolling tool Download PDFInfo
- Publication number
- US20050115293A1 US20050115293A1 US10/707,231 US70723103A US2005115293A1 US 20050115293 A1 US20050115293 A1 US 20050115293A1 US 70723103 A US70723103 A US 70723103A US 2005115293 A1 US2005115293 A1 US 2005115293A1
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- US
- United States
- Prior art keywords
- boring bar
- tool holder
- tool
- thread rolling
- cold roll
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
- B23P9/02—Treating or finishing by applying pressure, e.g. knurling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
Definitions
- the present invention is generally related to the field of thread formation, and, more particularly, to a thread rolling tool that may be employed in forming threads on various components.
- Threaded connections are very commonplace for connecting various components to one another.
- sections of pipe or tubulars are sometimes connected to one another by a threaded connection, i.e., a box (female) threaded connection formed on one end of a pipe, and a pin (male) threaded connection formed on the other end of the pipe.
- Sections of pipe are coupled to one another by these threaded connections.
- threaded connections are routinely and widely employed.
- threads are formed by a process wherein a cutting tool is employed to form the threads in the component, e.g., a section of pipe, using a lathe and known tooling components. Thereafter, in some cases, it is desirable that the mechanical properties of the threads be enhanced by cold working the threads, i.e., it is desirable to enhance the mechanism properties of the root of the threads and the various thread surfaces where high stress points could result in fatigue failure.
- FIG. 1 provides a schematic example of at least one technique for cold working threads formed on a component.
- a plurality of schematically depicted threads 10 are formed on a component 12 .
- a cold roll wheel 14 having an end 16 is depicted positioned above the threads 10 .
- the cold roll wheel 14 may be used to cold work the threads 10 .
- the end 16 of the wheel 14 will be positioned in the threads 10 such that the end 16 is aligned with the root 18 of a particular thread.
- force is applied to the cold roll wheel 14 (by, for example, actuating one or more levers on the lathe) and the wheel 14 follows the path of the threads 10 thereby cold working the threads 10 to improve the mechanical properties thereof.
- the cold working process where pressure on the order of, for example, approximately 1000 psi or so is applied to the thread 10 via the wheel 14 , may damage or destroy the previously formed thread profiles.
- a wheel 14 in dashed lines
- FIG. 1 a wheel 14 (in dashed lines) that is misaligned with respect to the root 18 is depicted in FIG. 1 . If the end 16 of the misaligned wheel 14 is located at a position relatively far from the root 18 of the thread, application of pressure to the wheel 14 to cold work the threads may damage the existing thread profile. At a minimum, the cold working process may not result in the desired finished product if the end 16 of the wheel 14 is not properly positioned in the threads 10 . Moreover, the positioning of prior art thread rolling tools is very time consuming, thereby limiting productivity. Lastly, due to the difficult in properly aligning the prior art thread rolling tool described above, the chance of producing defective end products is increased.
- the present invention is directed to an apparatus and methods for solving, or at least reducing the effects of, some or all of the aforementioned problems.
- the present invention is directed to a thread rolling tool that may be used in forming various threads.
- the tool comprises a tool holder, a boring bar and a cold roll wheel operatively coupled to the boring bar, wherein a position of the cold roll wheel relative to the tool holder along a first direction is moveable.
- the tool comprises a tool holder, a boring bar slidingly coupled to the tool holder to thereby allow movement of the boring bar in a first direction relative to the tool holder, and a cold roll wheel operatively coupled to the boring bar.
- the tool comprises a tool holder, a boring bar that extends through and is slidingly coupled to the tool holder to thereby allow movement of the boring bar in a first direction relative to the tool holder, a cold roll wheel operatively coupled to the boring bar and at least one projection for limiting travel of the boring bar relative to the tool holder along the first direction.
- FIG. 1 is a schematic depiction of an illustrative thread profile in a cold forming tool in accordance with prior art techniques.
- FIG. 2 is a schematic depiction of an illustrative lathe having a thread rolling tool in accordance with one aspect of the present invention positioned therein.
- FIGS. 3A-3C are various views of an illustrative thread rolling tool in accordance with one embodiment of the present invention.
- FIGS. 4A and 4B are views of one illustrative embodiment of the thread rolling tool during the assembly process.
- FIGS. 5A and 5B are illustrative views of a thread rolling tool in accordance with the present invention positioned in a lathe.
- the present invention is directed to a thread rolling tool that may be used in cold working threads.
- the present invention may be employed with the formation of a variety of different types of threads on a variety of different type components.
- the present invention should not be considered as limited to the formation of any particular type of thread on any particular type of component unless such limitations are expressly set forth in the appended claims.
- FIG. 2 is a schematic depiction of an illustrative lathe 20 having a thread rolling tool 22 in accordance with one embodiment of the present invention positioned therein.
- the lathe 20 is provided by way of example only and it should be understood to be representative of any of a variety of different types of lathes or other machinery used to initially form a thread prior to performing a cold working process on the thread, or a machine that is involved in any process of cold working threads.
- the present invention should not be considered as limited in any respect as to the equipment or methodologies used in forming the thread unless such limitations are expressly set forth in the appended claims.
- the lathe 20 is comprised of a head stock 24 , a chuck 26 , a tool post 30 , a bed 32 , a cross slide lever 34 , a longitudinal slide control 36 and a gear engagement lever 38 .
- an illustrative workpiece 28 e.g., a section of pipe.
- the thread rolling tool 22 is secured to the tool post 30 by a plurality of threaded pins 31 .
- FIGS. 3A and 3C are top and side views, respectively, of one illustrative embodiment of the thread rolling tool 22 disclosed herein.
- FIG. 3B is an enlarged view of a portion of the thread rolling tool 22 .
- the thread rolling tool 22 is comprised of a moveable boring bar 42 that is slidingly coupled to a tool holder 40 . That is, there is a sliding clearance between the tool holder 40 and the moveable boring bar 42 to allow the bar 42 to slide within the tool holder 40 in a first direction, as indicated by the double arrow 60 , i.e., in a direction that is approximately parallel to the longitudinal axis of the boring bar 42 .
- the tool holder 40 is comprised of a generally cylindrical body 41 and a clamp block 46 that is of a generally rectangular shape.
- a key 44 is used to limit relative movement between the moveable boring bar 42 and the tool holder 40 in a second direction, i.e., to limit rotational movement between the moveable boring bar 42 and the tool holder 40 around the longitudinal axis of the boring bar 42 .
- projections 48 i.e., screws, are provided to limit relative longitudinal movement of the moveable boring bar 42 relative to the tool holder 40 in the first direction.
- the screws 48 are located in position so as to limit the relative travel between the moveable boring bar 42 and the tool holder 40 along the first direction 60 to approximately 1-2 inches.
- the clamp block 46 has a generally rectangular configuration to facilitate securement of the thread rolling tool 22 to the tool post 30 on the lathe 20 via the threaded pins 31 .
- this particular configuration may be varied depending upon, for example, the configuration of the machine that employs the thread rolling tool 22 of the present inventions. That is, other mechanisms may be provided to insure that the thread rolling tool 22 may be secured to a machine, e.g., lathe 20 , that may be employed in using the present invention.
- the thread rolling tool 22 further comprises a cold roll wheel 50 having an end 51 , a piston 52 , a dowel pin 54 that connects the wheel 50 to the piston 52 , a piston limit pin 56 that is used to limit the vertical movement of the piston 52 and an O-ring 58 that provides the necessary seal for hydraulic fluid employed in the present invention.
- the moveable boring bar 42 has an internal passageway 62 formed therein and a pressure gauge 63 is coupled to the moveable boring bar 42 .
- the hydraulic fluid within the internal passageway 62 transmits the pressure acting on the wheel 50 to the pressure gauge 63 . This pressure may be observed by a machinist.
- FIGS. 4A and 4B are various views depicting the assembly sequence of the thread rolling tool 22 in accordance with one embodiment of the present invention.
- a slot 66 is formed in the moveable boring bar 42 and a key 44 is positioned therein.
- the size and configuration of the key 44 and slot 66 may vary depending upon the desired application.
- the key 44 may be approximately four inches in length (along the axial direction of the moveable boring bar 42 ) and its surface 44 A may protrude above a surface 42 A of the moveable boring bar 42 by a distance of approximately one-half inch.
- a slot 68 is formed in the tool holder 40 and is adapted to receive the key 44 positioned therein.
- the use of the key 44 limits relative movement of the moveable boring bar 42 and the tool holder 40 in a given direction, i.e., the key 44 limits relative rotational movement between the tool holder 40 and the moveable boring bar 42 .
- protrusions i.e., screws 48
- first direction e.g., in a longitudinal direction that is approximately parallel with a longitudinal axis of the moveable boring bar 42 .
- hydraulic fluid will be introduced into the internal passageways 62 of the tool, via openings provided for the protrusions 48 , e.g., screws, and/or the opening provided to allow fluid communication with the pressure gauge 63 .
- the screws 48 will be used as a means to fill and bleed off air within the internal passageway 62 and/or the piston 52 of the thread rolling tool 22 .
- the thread rolling tool 22 is secured within the tool post 30 of the lathe 20 via a plurality of threaded pins 31 .
- the threaded pins 31 engage the clamp block 46 on the tool holder 40 .
- the particular mechanism and manner by which the tool holder 40 is secured to the lathe 20 may vary depending upon the particular application.
- the machinist then advances the end 51 of the cold roll wheel 50 to a point where it is proximate a previously formed thread profile.
- the end 51 of the cold roll wheel 50 may be brought into engagement with previously formed threads on the workpiece 28 .
- the end 51 of the wheel 50 can move (in a lateral direction) so that it may tend to naturally find the proper position within the thread profile, i.e., the end 51 may be positioned at the root of the thread prior to beginning cold working operations.
- the lathe is actuated to apply pressure to the end 51 of the wheel 50 , the self-alignment forces tend to become greater, i.e., the end 51 would tend to be biased toward the root of a particular thread profile due to the various tapered surfaces.
- the end 51 of the cold roll wheel 50 may be more quickly and properly positioned at the desired location prior to beginning cold working operations. Due to the allowed relative longitudinal movement between the cold roll wheel 50 and the tool holder 40 , the present invention enables a machinist to readily locate and position the end 51 of the cold roll wheel 50 at the desired location. In turn, this improves manufacturing inefficiencies and leads to reduced waste.
- the present invention is directed to a thread rolling tool that may be used in forming various threads.
- the tool comprises a tool holder, a boring bar and a cold roll wheel operatively coupled to the boring bar, wherein a position of the cold roll wheel relative to the tool holder along a first direction is moveable.
- the tool comprises a tool holder, a boring bar slidingly coupled to the tool holder to thereby allow movement of the boring bar in a first direction relative to the tool holder, and a cold roll wheel operatively coupled to the boring bar.
- the tool comprises a tool holder, a boring bar that extends through and is slidingly coupled to the tool holder to thereby allow movement of the boring bar in a first direction relative to the tool holder, a cold roll wheel operatively coupled to the boring bar and at least one projection for limiting travel of the boring bar relative to the tool holder along the first direction.
Abstract
Description
- 1. Field of the Invention
- The present invention is generally related to the field of thread formation, and, more particularly, to a thread rolling tool that may be employed in forming threads on various components.
- 2. Description of the Related Art
- Threaded connections are very commonplace for connecting various components to one another. For example, in the oilfield industry, sections of pipe or tubulars are sometimes connected to one another by a threaded connection, i.e., a box (female) threaded connection formed on one end of a pipe, and a pin (male) threaded connection formed on the other end of the pipe. Sections of pipe are coupled to one another by these threaded connections. Of course, there are many other industries and applications where threaded connections are routinely and widely employed.
- There are a variety of well known manufacturing techniques for forming threads on the various components. Moreover, the size, shape and configuration of the threads formed by such processes may vary widely depending upon the particular application and the anticipated loading conditions. In some cases, threads are formed by a process wherein a cutting tool is employed to form the threads in the component, e.g., a section of pipe, using a lathe and known tooling components. Thereafter, in some cases, it is desirable that the mechanical properties of the threads be enhanced by cold working the threads, i.e., it is desirable to enhance the mechanism properties of the root of the threads and the various thread surfaces where high stress points could result in fatigue failure. By cold working the threads, various mechanical properties of the thread may be improved, e.g., hardness, etc. There are many tools and techniques on the market for cold working threads. Most of such thread rolling tools are designed to fit onto CNC machines and/or are designed for use with industry standard thread profiles, e.g., API connectors.
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FIG. 1 provides a schematic example of at least one technique for cold working threads formed on a component. As depicted therein, a plurality of schematically depictedthreads 10 are formed on acomponent 12. Acold roll wheel 14 having anend 16 is depicted positioned above thethreads 10. After thethreads 10 are initially formed by, for example, a cutting process, thecold roll wheel 14 may be used to cold work thethreads 10. Ideally, theend 16 of thewheel 14 will be positioned in thethreads 10 such that theend 16 is aligned with theroot 18 of a particular thread. Thereafter, force is applied to the cold roll wheel 14 (by, for example, actuating one or more levers on the lathe) and thewheel 14 follows the path of thethreads 10 thereby cold working thethreads 10 to improve the mechanical properties thereof. - However, in practice, it is very difficult to precisely locate the
end 16 of thecold roll wheel 14 at the desired location on the thread profile. More specifically, in most thread rolling tools, the relative position of theend 16 of thecold roll wheel 14 relative to a holder (not shown) that is used to secure the cold roll tool to a machine tool is fixed. Thus, in using the existing thread rolling tools, a machinist must expend great time and effort trying to insure that theend 16 of thewheel 14 is properly positioned in theroot 18 of thethread 10. Such efforts may include the use of mirrors and additional lighting in an effort to insure that theend 16 is properly located in theroot 18. Properly locating theend 16 in theroot 18 of the thread is critical to the cold working operation. Absent proper alignment, the cold working process, where pressure on the order of, for example, approximately 1000 psi or so is applied to thethread 10 via thewheel 14, may damage or destroy the previously formed thread profiles. For example, a wheel 14 (in dashed lines) that is misaligned with respect to theroot 18 is depicted inFIG. 1 . If theend 16 of the misalignedwheel 14 is located at a position relatively far from theroot 18 of the thread, application of pressure to thewheel 14 to cold work the threads may damage the existing thread profile. At a minimum, the cold working process may not result in the desired finished product if theend 16 of thewheel 14 is not properly positioned in thethreads 10. Moreover, the positioning of prior art thread rolling tools is very time consuming, thereby limiting productivity. Lastly, due to the difficult in properly aligning the prior art thread rolling tool described above, the chance of producing defective end products is increased. - The present invention is directed to an apparatus and methods for solving, or at least reducing the effects of, some or all of the aforementioned problems.
- The present invention is directed to a thread rolling tool that may be used in forming various threads. In one illustrative embodiment, the tool comprises a tool holder, a boring bar and a cold roll wheel operatively coupled to the boring bar, wherein a position of the cold roll wheel relative to the tool holder along a first direction is moveable.
- In another illustrative embodiment, the tool comprises a tool holder, a boring bar slidingly coupled to the tool holder to thereby allow movement of the boring bar in a first direction relative to the tool holder, and a cold roll wheel operatively coupled to the boring bar.
- In yet another illustrative embodiment, the tool comprises a tool holder, a boring bar that extends through and is slidingly coupled to the tool holder to thereby allow movement of the boring bar in a first direction relative to the tool holder, a cold roll wheel operatively coupled to the boring bar and at least one projection for limiting travel of the boring bar relative to the tool holder along the first direction.
- The invention may be understood by reference to the following description taken in conjunction with the accompanying drawings, in which like reference numerals identify like elements.
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FIG. 1 is a schematic depiction of an illustrative thread profile in a cold forming tool in accordance with prior art techniques. -
FIG. 2 is a schematic depiction of an illustrative lathe having a thread rolling tool in accordance with one aspect of the present invention positioned therein. -
FIGS. 3A-3C are various views of an illustrative thread rolling tool in accordance with one embodiment of the present invention. -
FIGS. 4A and 4B are views of one illustrative embodiment of the thread rolling tool during the assembly process. -
FIGS. 5A and 5B are illustrative views of a thread rolling tool in accordance with the present invention positioned in a lathe. - While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the description herein of specific embodiments is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
- Illustrative embodiments of the invention are described below. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.
- The present invention will now be described with reference to the attached figures. The words and phrases used herein should be understood and interpreted to have a meaning consistent with the understanding of those words and phrases by those skilled in the relevant art. No special definition of a term or phrase, i.e., a definition that is different from the ordinary and customary meaning as understood by those skilled in the art, is intended to be implied by consistent usage of the term or phrase herein. To the extent that a term or phrase is intended to have a special meaning, i.e., a meaning other than that understood by skilled artisans, such a special definition will be expressly set forth in the specification in a definitional manner that directly and unequivocally provides the special definition for the term or phrase.
- In general, the present invention is directed to a thread rolling tool that may be used in cold working threads. As will be recognized by those skilled in the art after a complete reading of the present application, the present invention may be employed with the formation of a variety of different types of threads on a variety of different type components. Thus, the present invention should not be considered as limited to the formation of any particular type of thread on any particular type of component unless such limitations are expressly set forth in the appended claims.
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FIG. 2 is a schematic depiction of anillustrative lathe 20 having athread rolling tool 22 in accordance with one embodiment of the present invention positioned therein. Thelathe 20 is provided by way of example only and it should be understood to be representative of any of a variety of different types of lathes or other machinery used to initially form a thread prior to performing a cold working process on the thread, or a machine that is involved in any process of cold working threads. Thus, the present invention should not be considered as limited in any respect as to the equipment or methodologies used in forming the thread unless such limitations are expressly set forth in the appended claims. As shown therein, thelathe 20 is comprised of ahead stock 24, achuck 26, atool post 30, abed 32, across slide lever 34, alongitudinal slide control 36 and agear engagement lever 38. Also depicted inFIG. 2 is anillustrative workpiece 28, e.g., a section of pipe. Thethread rolling tool 22 is secured to thetool post 30 by a plurality of threaded pins 31. -
FIGS. 3A and 3C are top and side views, respectively, of one illustrative embodiment of thethread rolling tool 22 disclosed herein.FIG. 3B is an enlarged view of a portion of thethread rolling tool 22. As shown in these drawings, thethread rolling tool 22 is comprised of a moveableboring bar 42 that is slidingly coupled to atool holder 40. That is, there is a sliding clearance between thetool holder 40 and the moveableboring bar 42 to allow thebar 42 to slide within thetool holder 40 in a first direction, as indicated by thedouble arrow 60, i.e., in a direction that is approximately parallel to the longitudinal axis of theboring bar 42. In the depicted embodiment, thetool holder 40 is comprised of a generallycylindrical body 41 and aclamp block 46 that is of a generally rectangular shape. A key 44 is used to limit relative movement between the moveableboring bar 42 and thetool holder 40 in a second direction, i.e., to limit rotational movement between the moveableboring bar 42 and thetool holder 40 around the longitudinal axis of theboring bar 42. Also,projections 48, i.e., screws, are provided to limit relative longitudinal movement of the moveableboring bar 42 relative to thetool holder 40 in the first direction. In one illustrative embodiment, thescrews 48 are located in position so as to limit the relative travel between the moveableboring bar 42 and thetool holder 40 along thefirst direction 60 to approximately 1-2 inches. Of course, the limit of this travel may be adjusted depending upon a particular application. In the depicted embodiment, theclamp block 46 has a generally rectangular configuration to facilitate securement of thethread rolling tool 22 to thetool post 30 on thelathe 20 via the threaded pins 31. Of course, as will be recognized by those skilled in the art, this particular configuration may be varied depending upon, for example, the configuration of the machine that employs thethread rolling tool 22 of the present inventions. That is, other mechanisms may be provided to insure that thethread rolling tool 22 may be secured to a machine, e.g.,lathe 20, that may be employed in using the present invention. - The
thread rolling tool 22 further comprises acold roll wheel 50 having anend 51, apiston 52, adowel pin 54 that connects thewheel 50 to thepiston 52, apiston limit pin 56 that is used to limit the vertical movement of thepiston 52 and an O-ring 58 that provides the necessary seal for hydraulic fluid employed in the present invention. The moveableboring bar 42 has aninternal passageway 62 formed therein and apressure gauge 63 is coupled to the moveableboring bar 42. The hydraulic fluid within theinternal passageway 62 transmits the pressure acting on thewheel 50 to thepressure gauge 63. This pressure may be observed by a machinist. -
FIGS. 4A and 4B are various views depicting the assembly sequence of thethread rolling tool 22 in accordance with one embodiment of the present invention. As shown inFIG. 4A , aslot 66 is formed in the moveableboring bar 42 and a key 44 is positioned therein. The size and configuration of the key 44 andslot 66 may vary depending upon the desired application. In one illustrative embodiment, the key 44 may be approximately four inches in length (along the axial direction of the moveable boring bar 42) and its surface 44A may protrude above a surface 42A of the moveableboring bar 42 by a distance of approximately one-half inch. Aslot 68 is formed in thetool holder 40 and is adapted to receive the key 44 positioned therein. The use of the key 44 limits relative movement of the moveableboring bar 42 and thetool holder 40 in a given direction, i.e., the key 44 limits relative rotational movement between thetool holder 40 and the moveableboring bar 42. As indicated inFIG. 4B , after thetool holder 40 is properly positioned over the key 44, protrusions, i.e., screws 48, may be secured in place at the desired location to thereby limit the relative travel between the moveableboring bar 42 and thetool holder 40 in a first direction, e.g., in a longitudinal direction that is approximately parallel with a longitudinal axis of the moveableboring bar 42. - The operation and use of the
thread rolling tool 22 of the present invention will now be described. At some point during the course of assembly of thethread rolling tool 22, hydraulic fluid will be introduced into theinternal passageways 62 of the tool, via openings provided for theprotrusions 48, e.g., screws, and/or the opening provided to allow fluid communication with thepressure gauge 63. Typically, thescrews 48 will be used as a means to fill and bleed off air within theinternal passageway 62 and/or thepiston 52 of thethread rolling tool 22. Once the system is properly filled with hydraulic fluid, it may be positioned on thetool post 30 as indicated inFIGS. 5A and 5B . As shown therein, thethread rolling tool 22 is secured within thetool post 30 of thelathe 20 via a plurality of threaded pins 31. The threaded pins 31 engage theclamp block 46 on thetool holder 40. Of course, as indicated before, the particular mechanism and manner by which thetool holder 40 is secured to thelathe 20, or any other type of machinery, may vary depending upon the particular application. - Once the
thread rolling tool 22 of the present invention is properly positioned in thelathe 20, the machinist then advances theend 51 of thecold roll wheel 50 to a point where it is proximate a previously formed thread profile. By incremental actuation of various control levers on thelathe 20 and/or movement of the moveableboring bar 42, theend 51 of thecold roll wheel 50 may be brought into engagement with previously formed threads on theworkpiece 28. Due to the fact that thethread rolling tool 22 of the present invention allows relative movement, e.g., in a longitudinal direction, between thecold roll wheel 50 and thetool holder 40, theend 51 of thewheel 50 can move (in a lateral direction) so that it may tend to naturally find the proper position within the thread profile, i.e., theend 51 may be positioned at the root of the thread prior to beginning cold working operations. Moreover, as the lathe is actuated to apply pressure to theend 51 of thewheel 50, the self-alignment forces tend to become greater, i.e., theend 51 would tend to be biased toward the root of a particular thread profile due to the various tapered surfaces. - Through use of the present invention, the
end 51 of thecold roll wheel 50 may be more quickly and properly positioned at the desired location prior to beginning cold working operations. Due to the allowed relative longitudinal movement between thecold roll wheel 50 and thetool holder 40, the present invention enables a machinist to readily locate and position theend 51 of thecold roll wheel 50 at the desired location. In turn, this improves manufacturing inefficiencies and leads to reduced waste. - The present invention is directed to a thread rolling tool that may be used in forming various threads. In one illustrative embodiment, the tool comprises a tool holder, a boring bar and a cold roll wheel operatively coupled to the boring bar, wherein a position of the cold roll wheel relative to the tool holder along a first direction is moveable.
- In another illustrative embodiment, the tool comprises a tool holder, a boring bar slidingly coupled to the tool holder to thereby allow movement of the boring bar in a first direction relative to the tool holder, and a cold roll wheel operatively coupled to the boring bar.
- In yet another illustrative embodiment, the tool comprises a tool holder, a boring bar that extends through and is slidingly coupled to the tool holder to thereby allow movement of the boring bar in a first direction relative to the tool holder, a cold roll wheel operatively coupled to the boring bar and at least one projection for limiting travel of the boring bar relative to the tool holder along the first direction.
- The particular embodiments disclosed above are illustrative only, as the invention may be modified and practiced in different but equivalent manners apparent to those skilled in the art having the benefit of the teachings herein. For example, the process steps set forth above may be performed in a different order. Furthermore, no limitations are intended to the details of construction or design herein shown, other than as described in the claims below. It is therefore evident that the particular embodiments disclosed above may be altered or modified and all such variations are considered within the scope and spirit of the invention. Accordingly, the protection sought herein is as set forth in the claims below.
Claims (18)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US10/707,231 US20050115293A1 (en) | 2003-11-28 | 2003-11-28 | Thread rolling tool |
GB0425894A GB2408472B (en) | 2003-11-28 | 2004-11-25 | Thread rolling tool |
SG200406893A SG112063A1 (en) | 2003-11-28 | 2004-11-26 | Thread rolling tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/707,231 US20050115293A1 (en) | 2003-11-28 | 2003-11-28 | Thread rolling tool |
Publications (1)
Publication Number | Publication Date |
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US20050115293A1 true US20050115293A1 (en) | 2005-06-02 |
Family
ID=33565363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/707,231 Abandoned US20050115293A1 (en) | 2003-11-28 | 2003-11-28 | Thread rolling tool |
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US (1) | US20050115293A1 (en) |
GB (1) | GB2408472B (en) |
SG (1) | SG112063A1 (en) |
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US20100137116A1 (en) * | 2008-12-03 | 2010-06-03 | Hanwit Precision Industries Ltd. | Quick-positioning screw assembly machining method |
CN103212942A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Internal thread constant value cold rolling device |
CN103212941A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Hydraulic type external thread cold rolling device |
US20140165352A1 (en) * | 2012-12-14 | 2014-06-19 | Brinkman Products, Inc. | Cold root-rolling device |
CN104690196A (en) * | 2015-02-14 | 2015-06-10 | 合肥誉联信息科技有限公司 | Fixture used in rolling of screw thread of piston rod |
CN111571117A (en) * | 2020-05-22 | 2020-08-25 | 李俊明 | Flange parameter excircle rolling equipment |
WO2020231394A1 (en) * | 2019-05-10 | 2020-11-19 | Brinkman Products, Inc. | Burnishing devices adapted for use in smaller diameter pipes |
US11426835B2 (en) * | 2013-03-05 | 2022-08-30 | Knust-Godwin Llc | Screw thread roller burnishing apparatus |
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US9885214B2 (en) | 2009-07-14 | 2018-02-06 | Ptech Drilling Tubulars, Llc | Threaded tool joint connection |
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2003
- 2003-11-28 US US10/707,231 patent/US20050115293A1/en not_active Abandoned
-
2004
- 2004-11-25 GB GB0425894A patent/GB2408472B/en not_active Expired - Fee Related
- 2004-11-26 SG SG200406893A patent/SG112063A1/en unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
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US3827821A (en) * | 1973-04-09 | 1974-08-06 | H Swenson | Axially actuated back spot facing tool |
US4063843A (en) * | 1976-06-21 | 1977-12-20 | Kennametal Inc. | Adjustable boring bar |
US4507027A (en) * | 1982-07-12 | 1985-03-26 | Thomas Adamson | Adjustable boring head tool holder |
US4706483A (en) * | 1982-08-03 | 1987-11-17 | Equipements Automobiles Marchal | Method and device for finishing by burnishing of a helical thread cut on a cylindrical component |
US4582457A (en) * | 1983-12-12 | 1986-04-15 | Belttari Stanley C | Adjustable boring bar |
US4766750A (en) * | 1987-12-14 | 1988-08-30 | C. J. Winter Machine Works | Control mechanism for thread rolling attachment |
US5417095A (en) * | 1993-11-08 | 1995-05-23 | C.J. Winter Machine Works, Inc. | Thread rolling attachment and method |
US5468102A (en) * | 1994-09-02 | 1995-11-21 | Stojanovski; Stojan | Milling tool holder |
US5528917A (en) * | 1994-09-29 | 1996-06-25 | Ford Motor Company | Force controlled rolling of gears |
US6912883B2 (en) * | 2002-03-26 | 2005-07-05 | Minebea Co., Ltd. | Load measuring system for a thread rolling machine and operating method therefor |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100137116A1 (en) * | 2008-12-03 | 2010-06-03 | Hanwit Precision Industries Ltd. | Quick-positioning screw assembly machining method |
US20140165352A1 (en) * | 2012-12-14 | 2014-06-19 | Brinkman Products, Inc. | Cold root-rolling device |
JP2016503727A (en) * | 2012-12-14 | 2016-02-08 | ブリンクマン プロダクツ、インコーポレイテッド | Cold valley bottom rolling device |
EP2932011A4 (en) * | 2012-12-14 | 2016-08-17 | Brinkman Products Inc | Cold root-rolling device |
US9539697B2 (en) * | 2012-12-14 | 2017-01-10 | Brinkman Products, Inc. | Cold root-rolling device |
US11426835B2 (en) * | 2013-03-05 | 2022-08-30 | Knust-Godwin Llc | Screw thread roller burnishing apparatus |
CN103212942A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Internal thread constant value cold rolling device |
CN103212941A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Hydraulic type external thread cold rolling device |
CN104690196A (en) * | 2015-02-14 | 2015-06-10 | 合肥誉联信息科技有限公司 | Fixture used in rolling of screw thread of piston rod |
WO2020231394A1 (en) * | 2019-05-10 | 2020-11-19 | Brinkman Products, Inc. | Burnishing devices adapted for use in smaller diameter pipes |
CN111571117A (en) * | 2020-05-22 | 2020-08-25 | 李俊明 | Flange parameter excircle rolling equipment |
Also Published As
Publication number | Publication date |
---|---|
GB0425894D0 (en) | 2004-12-29 |
GB2408472A (en) | 2005-06-01 |
GB2408472B (en) | 2006-03-22 |
SG112063A1 (en) | 2005-06-29 |
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