Classifications

• • 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
• • 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
  • B21H3/04—Making by means of profiled-rolls or die rolls
• • 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
  • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
  • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
  • B21H7/187—Rolling helical or rectilinear grooves
• • 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
  • Y10T29/53—Means to assemble or disassemble
  • Y10T29/53961—Means to assemble or disassemble with work-holder for assembly

Definitions

• the invention relates to a device having at least one profiling tool having an outer profile for introducing an outer profile, in particular an outer thread, into a workpiece having a circular cross-sectional area by non-cutting shaping, in particular by rolling or rolling. Furthermore, the invention relates to a non-cutting deformation process for introducing an outer profile into a workpiece by means of such a device.
• Rolling external profiles is understood to mean the non-cutting production of external profiles by cold forming, in which the profile is rolled into the surface of the corresponding blank.
• the forming is based on the generation of compressive stresses by one or more on the workpiece imaging tools.
• Thread rolling is mainly used in the industrial manufacture of screws and threaded spindles or bolts.
• the rolling of an outer profile can be done with round tools in Einstech- or continuous process.
• the pair of jaws When thread rolling with flat tools, the pair of jaws has the thread counter-profile with the pitch angle of the thread, with one jaw firmly and the other is movable. The workpiece is then rolled between the flat jaws.
• the thread rolling with round tools can be done by piercing or continuous process.
• the workpiece is held by a ruler during the piercing process and stretched between points in the continuous process.
• the rollers In the piercing process, the rollers have a counter-profile with the same pitch angle as the rolled thread.
• the axes of rotation of the workpiece and the tools must be parallel to each other. Each pair of rollers can only be used for a specific thread.
• the profiling tools In the continuous process, the profiling tools have juxtaposed, gradual thread profiles. They are pivoted about the required pitch angle around the horizontal longitudinal axis. The use is possible to a limited extent even with smaller workpiece diameters.
• DE 77 38 892 U 1 relates to a device for producing threads on workpieces, in particular pipes.
• the device has a frame, whose mutually parallel longitudinal parts are formed like a slide rail, and a slidable on these longitudinal parts slide with attached motor.
• the device has a clamping device for clamping the workpiece coaxially with the axis of the rolling head.
• a plurality of elongated ribs are provided, each of which has a working profile at one edge, with which a blank of a fastening device is machined, wherein a thread is produced by rolling on the blank.
• the ribs are arranged side by side and fixed to each other, wherein the working profile for forming a tool is arranged on the same side.
• WO 01/68288 A1 discloses a thread rolling device which has two profiling tools with radial infeed. From DE 32 45 266 A1 a thread rolling approach with radial feed with two jaw members is known, which are each equipped with means for supporting a profiling tool at one end and a roller attached to the other end. The jaw members are pivotally mounted on the housing opposite each other.
• thread pressing is already used for producing round threads in thinner sheets.
• the thread is pressed by two profiled rollers in the workpiece.
• Dies or cutting dies are generally used for hand cutting and low accuracy threads. With cutting dies, turning back is no longer necessary.
• the die is used exclusively for cutting external threads and has three or more cutting edges inside. Between the cutting cavities are incorporated, which roll and dissipate the resulting chips. The cutting edges are serrated and geometrically represent the nut thread.
• the workpiece For cutting an external thread, the workpiece must already have the nominal diameter of the desired thread.
• the workpiece is fixed on one side with a non-rotatable attachment, the die is attached and rotated until the desired thread length is reached.
• Hexagonal cutting tools are also known from the prior art in order to move the cutting iron in inaccessible places by means of a ring or wrench.
• a disadvantage of such mobile deployable devices for thread cutting is on the one hand, that the threads can be introduced only beginning at a free end.
• DE 699 13 633 T describes a shape of a pipe cutter, which is designed as a mobile mit Geneva hand device.
• the pipe cutter is equipped with a cutting roller and two opposite, forming a locking element pressure rollers.
• a threaded rod mounted in a threaded sleeve allows relative movement of the cutting roller relative to the pressure rollers by means of a handle. These are therefore machining operations.
• the invention is based on the object to provide a much improved, mobile deployable device.
• the device should in particular allow the introduction of outer profiles preferably external threads in such workpieces, which are held stationary at both ends.
• the invention has the object to provide a suitable method for introducing such an outer profile method.
• the first object is achieved with a device according to the features of claim 1.
• the further embodiment of the invention can be found in the dependent claims.
• the workpiece between the profiling tool and the locking element tangentially inserted and removed, wherein the profiling tool has a stepless profile and depending on a desired pitch angle of an outer profile to be introduced within a Kraft Wegebene relative to the longitudinal axis of the workpiece with an adjustable inclination angle can be positioned.
• locking element and profiling tool in a power flow level so that no bending moments or tilting moments on the workpiece to be machined arise by a locking operation, which as a byproduct also profiling short, radially accessible workpieces allows.
• this makes it possible for the first time to manually introduce an external thread into a workpiece whose ends are bordered or inaccessible or in which the external thread is to be introduced only into a specific section between the end regions.
• the advantageous properties of chipless machining can be utilized by means of the device according to the invention, so that substantially improved properties of the external thread thus introduced can be realized.
• the slope is realized by tilting the tool axis.
• any length of thread can be rolled, the tool can be performed with only a few guide edges, so as to increase the pressure or to reduce the delivery force.
• all essentially cold-workable materials including special hard materials, are suitable as workpiece material.
• the profile is introduced without cutting after delivery with a predetermined feed force in the working position by turning the entire device around the workpiece longitudinal axis, wherein the profile geometry to be created by the profiling tool in terms of tread depth and profile shape is clearly predefined. Tilting or imprecise insertion of a profile is virtually impossible.
• the geometry of the workpiece in this case only requires a substantially circular cross-sectional area, which may also be tubular or may consist of a solid material. An electrical power supply is not required, so that a variety of applications are given for example under water or in alpine areas.
• a particularly practical embodiment of the invention is also achieved in that the locking element on its side facing the profiling tool an angle between 35 ° and 160 ° describes.
• the locking element can be fixed, for example adjustable or replaceable on the device.
• the locking element also proves to be particularly expedient if the locking element has a groove, so that the groove flanks symmetrically surround the workpiece.
• the groove flanks preferably include an angle between 35 ° and 160 °, in particular between 80 ° and 140 °.
• an embodiment of the present invention in which the locking element has at least one pressure roller opposite the profiling tool in order to minimize the friction occurring during rolling is particularly advantageous.
• the pressure roller preferably has a cylindrical geometry without profiling; but also the execution of a pressure roller as a profiling tool is conceivable, so that therefore the locking element also has a profiling. This can intervene, for example, in the interstices of the previously introduced outer profile, so as to improve the transmission of power by means of the locking element.
• the selection of materials takes into account the framework conditions that exclude both brittle and very soft materials.
• the locking element consists at least in sections of a material with a reduced sliding friction, so that the manual operation of the device is connected with little effort, resulting in a reduction of torsional stresses in the interior of the workpiece.
• the arresting element serving as an abutment can be coated, for example, with a vapor coating or made curable so as to achieve a reduction in wear or to be able to dispense with lubricant.
• the locking element or the pressure roller consist at least in the region of a contact surface with the workpiece of a low-plastic material, wherein a contact surface of the locking element or the pressure roller can be designed as a replaceable wear part.
• the profiling tool can have a counter-profile with a pitch angle to be introduced into the workpiece.
• the profiling tool has a stepless profile and depending on a desired pitch angle of an outer profile to be introduced within a Kraft Wegebene relative to the longitudinal axis of the workpiece with an inclination positionable, so as to enable the use of other workpiece diameters.
• the inclination angle is adjustable. In this way, even individual or non-standard exterior profiles can be realized.
• the profiling tool is releasably, in particular interchangeably fixed by means of a holder to the device so as to be able to make an effortless replacement of the profiling tool as needed.
• the tool is for this purpose connected in particular by means of a quick release with the holder.
• the locking element can be arranged displaceably on the device by means of a guide rail so as to be able to realize the relative delivery of the profiling tool relative to the locking element with little effort.
• the locking element is guided immovably in the rail, which at the same time has, for example, a recess designed as a receptacle for the stop.
• the delivery could be done by means of an eccentric.
• the profiling tool and the locking element could be made deliverable relative to each other by means of a particular electromotive actuator.
• the locking element can be delivered by means of a threaded rod or spindle mounted in a threaded sleeve so as to achieve a further adjustment range for inserting and removing different workpieces while maintaining a very fine, stepless adjustment.
• the shaping for initiating the rotational movement of the device about the workpiece longitudinal axis could be equipped with a polygonal recess for a commercially available tool, for example a torque wrench.
• the device has at least one lever arm, which carries a handle for manual transmission of the rotational movement around the workpiece, so that the device can easily be rotated by the operator with little effort around the workpiece longitudinal axis.
• the lever arm can be extended as needed, for example, be made telescopic.
• the threaded rod has a handle carrying the end portion, so that the threaded rod at the same time forms the lever arm for the pivotal movement of the device.
• the design effort for the preparation of the device can be further reduced.
• the second-mentioned object to provide a method suitable for introducing such an external thread, is achieved according to the invention with a chipless forming method for introducing an external thread into a workpiece by means of the device, in which a rest position is initially set, in which a locking element relative to an opposing profiling tool is spaced, and the workpiece is introduced radially between the profiling tool and the locking element, then the profiling tool and the locking element are delivered relative to each other until the desired feed force is transmitted to the workpiece, and finally introduced the external thread by a rotational movement of the device about the workpiece longitudinal axis becomes.
• the external thread can be introduced into a workpiece inaccessible at both ends.
• FIG. 1 shows a device according to the invention in a rest position in a perspective view.
• FIG. 2 shows a pressure roller or profiling tool and a locking element of the device shown in FIG. 1 in a working position when an external thread is introduced into a workpiece;
• FIG. 3 shows in an enlarged side view a locking element equipped with two pressure rollers for the device shown in FIG.
• the inventive device for profile rolling or rolling certain device 1 for chipless introduction of an external thread in a workpiece 2 is shown below with reference to Figures 1 to 3 in more detail.
• the device 1 is designed as a portable mobile hand-held device, so as to enable an on-site use, in particular for stationary workpieces 2.
• a Profiltechnikstechnikmaschinees 3 having the profile opposite a deliverable in the direction of the profiling tool 3 locking element 4 by means of a threaded sleeve 5 mounted in a threaded rod 6 slidably disposed.
• the locking element 4 consists of a low-wear material and has a groove 7, whose Groove base 8 parallel to the longitudinal axis 9 of the workpiece 2 extends.
• the locking element 4 additionally has at least one pressure roller 10 lying opposite the profiling tool 3.
• the workpiece 2 shown in FIG. 2 can be introduced from above between the profiling tool 3 and the locking element 4, so that the outer profile can be introduced into any position on the workpiece 2.
• the threaded rod 6 has a handle 11 so as to introduce the outer profile in the desired shape by a rotational movement of the device 1.
• the profiling tool 3 is fixed by means of a holder 12 releasably attached to the device 1.
• a holder 12 releasably attached to the device 1.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Agronomy & Crop Science (AREA)
• Turning (AREA)
• Forging (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=40673918

Family Applications (1)

Country Status (8)

Families Citing this family (11)

Family Cites Families (31)

• 2008
  • 2008-04-17 DE DE102008019437A patent/DE102008019437A1/de not_active Ceased
• 2009
  • 2009-03-03 US US12/988,270 patent/US8783079B2/en not_active Expired - Fee Related
  • 2009-03-03 RU RU2010146666/02A patent/RU2467821C2/ru not_active IP Right Cessation
  • 2009-03-03 CN CN200980113364.8A patent/CN102083566B/zh not_active Expired - Fee Related
  • 2009-03-03 WO PCT/DE2009/000285 patent/WO2009127178A1/de active Application Filing
  • 2009-03-03 EP EP09732947A patent/EP2274119A1/de not_active Ceased
  • 2009-03-03 JP JP2011504307A patent/JP2011516276A/ja active Pending
• 2010
  • 2010-10-13 IL IL208687A patent/IL208687A0/en unknown

Non-Patent Citations (1)

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