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
  • B21H3/042—Thread-rolling heads
  • B21H3/044—Thread-rolling heads working axially

Definitions

• the invention relates to a device for introducing a thread into a workpiece with a cylindrical outer surface by thread rolling with a
• Thread rolling often also referred to as thread rolling, is generally understood to mean the non-cutting production of thread by cold forming, in which the profile is rolled into the surface of the corresponding pipe part. According to DIN 8580, thread rolling is part of forming, more accurate pressure forming and rolling. The transformation is based on the generation of
• Threading namely threading.
• Jaw pair the thread counter-profile with the pitch angle of the thread one jaw fixed and the other is arranged to be movable.
• the workpiece is unrolled under the influence of frictional forces, so that the whole
• the dies have a tapered inlet and outlet and a straight calibration part.
• Thread rolling with round tools can be done in grooving or
• the workpiece is either held with a ruler (centerless) or stretched between points. Apart from slight compensatory movements, the workpiece remains axially steady during the rolling process. Since the ratio of roller to workpiece diameter and the number of gears must be exactly matched, a pair of rollers can only be used for a specific thread.
• stepless thread profiles They will be around the required
• Self-opening thread rolling heads usually have three rollers. They are brought axially to the workpiece and pull by the inclination of the rollers automatically on the workpiece. If the intended thread length is reached, the roller head opens automatically and can be withdrawn.
• the object of the invention is a maximum transportable, comparatively easy to use manually operable device for rolling
• Profiling tool is formed by a circular, rotatably mounted about its axis disc, projecting on the outer edge of two annular, coaxial, stepless profiles which form an annular space between them, which corresponds in shape and dimensions to the thread profile of the thread to be created.
• the invention relates to a device for thread rolling, in which between the rolling tool and jig a workpiece is to be clamped and clamped by means of screw feed. After locking can now be rolled by a rotary motion by hand, a thread in the workpiece.
• the thread geometry of the workpiece is determined by the
• the rolling tool is preferably as a
• Quick-change plug-in system executed and can thereby customize any external thread.
• Such a device has a simple construction on such a small design that it can be carried and operated by hand. It does not require an electric drive, but the forces can through
• Thread rolling device but the device can be easily carried to the point at which a thread is to be created.
• the workpiece as
• the solidification of the material by the rolling process is used.
• a secure hold with the simplest production is given when the cylindrical workpiece is held in a part-cylindrical groove of a bearing part, whose longitudinal axis is arranged obliquely to the axis of the profiling tool.
• the bearing part can be adjustable transversely and in particular at right angles to the axis of the profiling tool, in particular by hand.
• the cylindrical workpiece is mounted on the opposite side of the profiling tool by at least two axially parallel to the workpiece rollers, which are mounted on a support member.
• the bearing part is actuated by a threaded rod, in particular by hand.
• the workpiece in the space between the profiling tool and bearing member axially and / or radially be introduced and removed. It is particularly advantageous that the
• Thread rolling device manually operated as a hand tool
• Figure 1 shows a first embodiment in which the workpiece in the groove of a
• Figure 2 shows a second embodiment in which the workpiece by two
• Figure 3 shows an embodiment with a closed annular
• the thread rolling device 1 has a U-shaped support block 2, with a base 3 from which two legs 4, 5 go out.
• the first leg 4 is divided by a longitudinal slot 6 in two leg halves 4a, 4b and in the slot 6 a profiling tool 7 is mounted on an axis 8, the ends of both leg halves 4a, 4b penetrate to thereby be held by the leg 4.
• the profiling tool has a circular disc 9, on whose outer circular edge two adjacent annular coaxial profiles 10 of the same diameter and the same cross-section project such that they form a coaxial groove-shaped annular space 11 between them whose cross-section in shape and dimensions of the cross section of the thread profile of corresponds to the thread to be generated.
• the dimensions and the cross section of the profiles 10 are selected so that they correspond to the dimensions and the cross section of the thread of the thread to be created.
• a bearing member 20 which has a part-cylindrical groove 12 in which the workpiece rests, wherein the concave groove surface can be profiled according to the thread to be produced.
• a threaded rod 12 is mounted on this, which rests in a corresponding threaded bore of the second leg 5 and is rotatable about a handle 14 at its outer end by hand about its longitudinal axis to the support member 20 move the profiling tool to and fro.
• the profiling tool 7 may be mounted in the storage part 20 and the first
• the bearing part 20 may carry two guide wheels or two guide rollers 21, which run with profilings in the thread of the workpiece, as shown in FIG. 2.
• the surfaces of the rollers 21 may be smooth cylindrical, especially in one
• the support block 2 may not be U-shaped, but closed, d. H. the two legs 4, 5 are suppressed by an upper part 2a so that the
• Support block 2 is annular and the storage part 20 is in its central opening, as shown in FIG. 3 shows.
• the axis of rotation 8 of the disc 9 and thus also the two profiles 10 are arranged obliquely relative to the axis of the groove 12 and against the guide edges 21, so that a thread with a
• Guide member 20 is parallel to the axis 8 of the profiling tool.
• Machine is that it can be carried out locally, can be used flexibly, and, for example, set-up times eliminated.
• the tool is thus suitable for the production of small quantities and is also clear
• a non-lead profile is also used for shaping, but this profile is characterized in that it has exactly two circumferential ribs or rings, which form between them an annular gap which corresponds approximately to the thread profile to be formed. Although it could have several rings, but only two are in an application engaged on the workpiece.
• This shape of the profile roller ensures that the force that must be applied in order to allow the profile roller to penetrate into the material is minimized. Furthermore, an inclination of this profile roller relative to the workpiece axis to about the thread pitch that can be dispensed with a complicated forced operation as in known tools, and the profile role yet a profile with exactly the desired slope in the
• the workpiece is supported on the opposite side of the profile roller with a bearing element.
• This can, for example, as a solid with be formed adapted to the thread negative profile. It is relevant to the bearing element that it transmits the force as large as possible and not only selectively to the workpiece.
• Pipe cutter which differs from the invention described so far in that instead of a profile-giving, inclined profile roller, a straight cutting wheel is used.
• the proposed embodiment of the tool is characterized in that it is designed as a mobile mit réellebares hand tool. That's it
• At least one rest position is adjustable, in which a
• Insertion option for the workpiece offers maximum flexibility.
• profiling tool and the bearing element are in a power flow plane, so that no bending or tilting moments on the workpiece to be machined arise by a locking operation.
• the tool is designed so that the profiling tool relative to
• Workpiece axis is inclined at an angle which corresponds approximately to the thread pitch.
• Workpiece center are rolled starting from the end of the workpiece.
• the tool can not be accidentally set at an angle. Also, a touch of the workpiece at the workpiece end, as in the
• Thread cutting is common, to avoid tilting or oblique attachment, can be omitted.
• the advantageous properties of chipless machining can be used by means of the device according to the invention, so that the advantages of a thread produced by such a method can be realized manually by hand.
• the external thread is without cutting after delivery with a predetermined feed force in the working position by turning the entire device around the tool longitudinal axis
• Profiling tool with respect to the profile depth and profile shape is clearly predefined. Tilting or imprecise insertion of the profile is virtually impossible. Also, overfeeding is not possible because the forces increase exponentially as soon as the space between the two profiled ribs or rings is completely filled by the formed workpiece, the geometry of the workpiece only requiring a substantially cylindrical outer surface, and Furthermore, the external thread can be completely formed to a defined point so that a thread can be produced without an outlet.
• Another possible use of the tool is the thread repair. With the tool deformed external thread can be formed back again.
• Profiling tool is inclined relative to the workpiece axis, from which to are dependent on the generating thread type, it is expedient to use parts of the

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Forging (AREA)
• Rolling Contact Bearings (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Transmission Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2009
  • 2009-10-15 DE DE102009049580A patent/DE102009049580A1/de not_active Withdrawn
• 2010
  • 2010-09-02 WO PCT/EP2010/005398 patent/WO2011044970A1/de active Application Filing
  • 2010-09-02 EP EP10750069A patent/EP2488314A1/de not_active Withdrawn
  • 2010-09-02 CN CN2010800461351A patent/CN102574195A/zh active Pending
  • 2010-09-02 JP JP2012533493A patent/JP2013507256A/ja active Pending
  • 2010-09-02 RU RU2012119780/02A patent/RU2012119780A/ru not_active Application Discontinuation
• 2011
  • 2011-09-02 US US13/393,499 patent/US20120186318A1/en not_active Abandoned
• 2012
  • 2012-04-15 IL IL219141A patent/IL219141A0/en unknown

Non-Patent Citations (2)

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