US20050274165A1 - Method for treating the surface of metal workpieces with compressive and tensile stresses - Google Patents

Method for treating the surface of metal workpieces with compressive and tensile stresses Download PDF

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Publication number
US20050274165A1
US20050274165A1 US11/196,727 US19672705A US2005274165A1 US 20050274165 A1 US20050274165 A1 US 20050274165A1 US 19672705 A US19672705 A US 19672705A US 2005274165 A1 US2005274165 A1 US 2005274165A1
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Prior art keywords
workpiece
rolls
set forth
roll
outer profile
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Abandoned
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US11/196,727
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English (en)
Inventor
Kurt Kemper
Guenter Otto
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Individual
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Individual
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Priority claimed from DE19857626A external-priority patent/DE19857626C2/de
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Priority to US11/196,727 priority Critical patent/US20050274165A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C43/00—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
    • B21C43/02—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass combined with or specially adapted for use in connection with drawing or winding machines or apparatus
    • B21C43/04—Devices for de-scaling wire or like flexible work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing

Definitions

  • the invention relates to a method and device for surface treatment of workpieces and use thereof for surface treatment of workpieces of metal, preferably of steel and/or aluminum and/or alloys thereof.
  • an oxide film In drawing as well as in extruding workpieces such as for example, elongated sections, of metal, more particularly of aluminum, an oxide film generally forms on the outer surface thereof of considerable thickness in part.
  • longitudinal cracks or the like materialize in the surface thereof, especially in the case of aluminum. Since such oxide films and such longitudinal cracks automatically result in in the strength of the workpieces being reduced subsequent cleaning or removal of the material surface is necessary. This is, however, highly labor-intensive and thus cost-intensive.
  • In addition to this workpieces produced by drawing or extruding generally feature dimensions having extremely large tolerance ranges and thus subsequent straightening or shaping otherwise of the workpieces produced by drawing or extruding is a mandatory requirement for further processing or further use. Such a step in operations likewise adds to the work or costs involved. Similar problems are involved in the surface treatment of workpieces incorporating bores or similar openings such a through-holes and/or blind holes.
  • the present invention is thus based on the object of providing a method and a device for surface treatment of workpieces, more particularly of elongated sections having any cross-section or workpieces incorporating bores or similar openings which is exceptionally simple and permits production of workpieces featuring particularly high strength and hardness as well as high accuracy with no additional labor and cost expense as well as use thereof in surface treatment of workpieces, in the form of, for example, elongated sections of metal, more particularly of aluminum or alloys thereof.
  • the method in accordance with the invention achieves cleaning the material surface and/or the zone near to the surface thereof of oxide crusts, for example, aluminum oxide crusts and detrimental soilage.
  • oxide crusts for example, aluminum oxide crusts and detrimental soilage.
  • surface defects are thus simultaneously eliminated to thus avoid crack propagation caused thereby.
  • the result in all is that the workpieces are surrounded by an envelope several hundred microns thick identical in material which due to its enhanced material strength and the resulting inherent compressive stress has a stiffening effect.
  • the surface roughness is improved as compared to that of the workpieces directly after drawing or extruding by a factor of roughly 6 to 8 better, whereby roughness values of ra ⁇ 0.1 are the rule.
  • the workpiece in the special aspect of the invention as set forth in claim 3 is worked by at least one, more particularly two roll(s) provided at least in part with an outer profile in sequence in the opposite direction.
  • the surface of the workpiece to be treated is worked preferably transversely to the direction of movement of the workpiece first in one direction and then in the direction opposite thereto.
  • the workpiece or its surface in the form of an outer-located surface area and/or an inner-located surface area, for example, the inner wall of a bore, as set forth in claim 6 is worked by a roll provided at least in part with an outer profile and at least one, more particularly substantially non-profiled roll(s) arranged about the workpiece or in the at least one bore or similar opening.
  • the workpiece is worked by two rolls each provided at least in part with an outer profile and a substantially non-profiled roll arranged about the workpiece, more particularly equispaced from each other.
  • the workpiece or the surface area thereof to be treated is worked as set forth in claim 9 by two rolls having an outer profile in the form of annular beads and recesses arranged at an angle ⁇ or ⁇ ′ to the longitudinal centerlines of the rolls.
  • the two rolls as set forth in claim 10 are preferably powered in the same direction of rotation when the annular beads and recesses arranged at an angle ⁇ or ⁇ ′ to the longitudinal centerlines of the two rolls comprise a lead position substantially opposing each other.
  • the rolls as set forth in claim 11 are powered in the opposite direction of rotation when the annular beads and recesses arranged at an angle ⁇ or ⁇ ′ to the longitudinal centerlines of the two rolls comprise a lead position substantially the same to each other.
  • the workpiece in accordance with the means as set forth in claim 13 is worked by at least one roll provided at least in part with an outer profile and is worked or supported by at least one further roll provided at least in part with an outer profile or a non-profiled roll or similar supporting means located spaced away and opposite the at least one roll.
  • Yet another aspect of the method in accordance with the invention involves working the surface to be treated of the workpiece as set forth in 14 by the at least one roll including an outer profile in the form of annular beads and recesses.
  • the workpiece or the surface area of the workpiece to be treated is worked by rolls having an outer profile in the form of beads and recesses arranged at an angle ⁇ or ⁇ ′ to the longitudinal centerlines of the rolls, whereby the rolls are powered in the same direction of rotation for a substantially opposite lead position of the beads and recesses or in the opposite direction of rotation for a substantially same lead position of the beads and recesses.
  • the workpiece or the surface area of the workpiece to be treated as set forth in claim 17 is worked by rolls having an outer profile in the form of annular beads and recesses arranged perpendicular to their longitudinal centerline, more particularly axially staggered relatively to each other.
  • the workpiece to be treated or the surface to be treated at least in part or the at least one bore or similar opening to be treated of the workpiece is coated with a covering of metal, such as chromium, copper or the like, and/or with a metal alloy and/or a paint and/or plastics and/or is anodized and/or galvanized and/or pickled.
  • a covering of metal such as chromium, copper or the like
  • metal alloy such as chromium, copper or the like
  • a metal alloy and/or a paint and/or plastics and/or is anodized and/or galvanized and/or pickled.
  • the copper coating remains bonded to the core of aluminum extremely durably and particularly resistant to abrasion. Making use of copper wires of solid material is now no longer necessary. In addition to weight-savings this thus achieves particularly considerable cost-savings.
  • high-load hard chromium coatings or the like without cost-intensive preparatory work, it now being possible, for example, to totally eliminate complicated and time-intensive stripping of the near-surface oxide films and/or soilage prior to chromium-plating workpieces such as brass shafts and the like, as hitherto necessary.
  • a coating resistant to abrasion of, for example, anodizing paints or anodizing or galvanizing of workpieces.
  • the workpieces to be treated or the treated workpieces and/or their coatings may consist of base metals such as for example, aluminum, lead, chromium, iron, cobalt, nickel, copper, manganese, molybdenum, silicon, tungsten, tin.
  • zink or alloys thereof such as brass or of noble metals such as gold, palladium, platinum, silver or alloys thereof, or of combinations of base and noble metals.
  • steel and/or aluminum and/or alloyed aluminum such as for example, AlMg 4.5 Mn, AlMgSi 0.5 , AlMgSi, AlMg 5 , AlZn 4.5 Mg, AlCuMg, AlCuMg 2 , AlZnMgCu 0.5 , AlZnMgCu 1.5 , AlCuMgPb.
  • workpieces for example, in the form of elongated sections
  • the device in accordance with the invention subjects the workpieces, for example, in the form of elongated sections, to a surface treatment involving no rotary movement, thus enabling feed speeds of up to approximately 100 mpm, for example, to be attained for such workpieces having a round surface.
  • feed speeds up to approximately 100 mpm, for example, to be attained for such workpieces having a round surface.
  • it is due to an extremely high working speed that the device in accordance with the invention achieves a substantial reduction in the labor and costs involved in the surface treatment of such workpieces having a round surface.
  • a device for surface treatment suitable for correspondingly working workpieces or their bores or similar openings such a through-holes and/or blind holes just as well, more particularly for implementing the method as set forth in any of the preceding claims, comprising at least two, more particularly three rolls arranged in parallel and in the bore or similar opening which are provided at least in part with an outer profile working the bore or similar opening and each rotatable individually about their longitudinal centerlines as well as in combination in the bore or similar opening.
  • the outer profile of the at least one roll working the workpiece or its surface and/or bores is configured in the form of annular beads and recesses arranged at an angle ⁇ and/or ⁇ ′ to the longitudinal centerline of the roll.
  • the non-profiled end of the at least one roll outgoing in the direction of movement of the workpiece has by contrast a slightly larger outer diameter to bring the already surface treatment workpiece to a constant dimension with a smooth surface.
  • the means afforded by claim 32 namely of controlling the drive means and/or the drive head hydraulically or pneumatically permit infinitely variable control in avoiding all and any slip and thus as a result an extremely high surface smoothness of the workpiece.
  • This also permits extremely precise influencing the feed rate of the workpiece in taking into account the characteristical features and operating conditions, such as diameter of the rolls, pitch of the annular beads and recesses, workpiece diameter and many other things.
  • One such hydraulically or pneumatically acting drive means is supported to advantage in addition by a sealing arrangement as is described for example, in DE 196 10 809 A1.
  • This sealing arrangement permits not only rotation of the rolls themselves but also rotation of the rolls about the workpiece.
  • claims 35 and 36 serve in a further aspect of the invention an extremely high versatility of the device since due to the movement of the drive means and drive head relative to each other a lengthwise compensation of rolls differing in length and thus optional interchangeability of the rolls is made possible.
  • the device in accordance with the invention for surface treatment of workpieces preferably with elongated sections having at least one flat surface, comprises at least one roll arranged substantially perpendicular or at an angle ⁇ to the longitudinal direction of the workpiece which is provided with an outer profile working the surface of the workpiece at least in part and which is rotatable about the longitudinal centerline thereof.
  • the device in accordance with the invention is thus suitable particularly for surface treatment of workpieces having an approximately rectangular, for example square, cross-section.
  • the at least one roll provided with an outer profile at least in part as set forth in claim 39 is assigned at least one further roll provided at least in part with an outer profile or non-profiled roll or the same supporting means opposite to provide a so-called counter-bearing for the at least one roll. If not only the upper surface of the workpiece is to be treated by the at least one roll, but also the lower surface at the same time, at least one further roll is provided comprising an outer profile. Otherwise a non-profiled roll or similar supporting means, for example, in the form of a supporting plate etc may be employed.
  • the at least one roll provided with an outer profile at least in part is followed by an additional roll provided likewise at least in part with an outer profile to work the surface of the workpiece in the direction of movement of the workpiece in sequence in the opposite direction, i.e. in shaping it approximately transversely or inclined to the direction of movement of workpiece in a single reciprocating movement.
  • upstream and/or dowstream of the at least one roll provided at least in part with an outer profile working the surface of the workpiece as set forth in claim 46 at least one non-profiled roll in the direction of movement of the workpiece.
  • the at least one upstream non-profiled roll comprises a slightly smaller outer diameter to feed the workpiece evenly to the outer profile and to thereby compensate or at least to mitigate any existing irregularities and undesirable out-of-tolerance, the one upstream non-profiled roll thus serving a certain straightening function.
  • the at least one non-profiled dowstream roll as set forth in claim 48 comprises a slightly larger outer diameter.
  • the at least one dowstream, non-profiled roll can thus be put to use for additional shaping.
  • annular beads as set forth in claim 49 protrude beyond the outer diameter of the at least one roll.
  • the mounting means and/or the supporting means is/are expediently hydraulically or pneumatically controllable.
  • the at least one (further) roll is assigned in each case a separate drive motor in expediently achieving individual control of each roll.
  • the rolls as set forth in claim 55 are configured multi-part, they more particularly for example, being composed of a roll of high toughness and an envelope of high strength or hardness and thus hardwearing.
  • the rolls as set forth in claim 56 are coolable by an internal cooling system and/or an external cooling bath as a result of which the useful life of the device can be enhanced.
  • steel and/or aluminum and/or alloyed aluminum such as for example, AlMg 4.5 Mn, AlMgSi 0.5 , AlMgSi, AlMg 5 , AlZn 4.5 Mg, AlCuMg, AlCuMg 2 , AlZnMgCu 0.5 , AlZnMgCu 1.5 , AlCuMgPb or of noble metals such as gold, palladium, platinum, silver or alloys thereof, or of combinations of base and noble metals.
  • Workpieces of for example, aluminum or alloys thereof have proven to be particularly suitable due to their various advantageous properties such as corrosion-resistance, low specific density, etc. It is particularly in the field of automotive engineering that these materials are finding ever-increasing application.
  • the method and the device in accordance with the invention can also be put to use in the production of coiled, more particularly hardened and/or coated workpieces preferably coiled springs.
  • FIG. 1 is a diagrammatic front view of one embodiment of a device configured in accordance with the invention for surface treatment of a workpiece shown partially sectioned having a round surface, for example, a round or tubular material,
  • FIG. 2 is a partly sectioned view from above of the device in accordance with the invention as shown in FIG. 1 in the direction of the arrows II-II on a magnified scale,
  • FIG. 4 is a plan view of the device in accordance with the invention as shown in FIG. 1 in the direction of the arrows IV-IV on a magnified scale,
  • FIGS. 5A and 5B are each a cross-sectional view-through the device in accordance with the invention as shown in FIG. 1 as taken along the line V-V and a diagrammatic plan view of three rolls of the device in accordance with the invention as shown in FIG. 5A each on a magnified scale,
  • FIGS. 6A, 6B and 6 C are diagrammatic side views of the embodiments of the three rolls of the device in accordance with the invention as shown in FIGS. 5A and 5B , each on a magnified scale,
  • FIGS. 7A and 7B are each a partial cross-sectional view through a further embodiment of a device in accordance with the invention as shown in FIG. 1 and a diagrammatic plan view of three rolls of the device in accordance with the invention as shown in FIG. 7A , each on a magnified scale,
  • FIGS. 8A and 8B are each a cross-sectional view through another embodiment of a device in accordance with the invention as shown in FIG. 1 and a diagrammatic plan view on three rolls of the device in accordance with the invention as shown in FIG. 8A , each on a magnified scale,
  • FIGS. 9A and 9B are each a diagrammatic front view of another embodiment of a device in accordance with the invention for surface treatment of a workpiece shown partly sectioned, including at least one flat surface, for example, a workpiece having a square, rectangular or other polygonal cross-section,
  • FIGS. 10A and 10B are each a diagrammatic side and plan view of the rolls of the embodiment of the device configured in accordance with the invention as shown in FIG. 7 corresponding to the detail VIII,
  • FIG. 11 is respectively a diagrammatic side and plan view of the rolls of the embodiment of the device configured in accordance with the invention as shown in FIG. 7 corresponding to the detail VIII,
  • FIGS. 12A and 12B are each a partly sectioned side view of the device in accordance with the invention as shown in FIG. 7 and a diagrammatic plan view of three rolls of the device in accordance with the invention as shown in FIG. 7 , each on a magnified scale,
  • FIGS. 13A, 13B and 13 C are diagrammatic illustrations of three example embodiments of possible steps in the method for producing workpieces of optional cross-section in which the device in accordance with the invention is integrated in each case.
  • FIGS. 1 to 1 C there is illustrated an embodiment of a device 10 in accordance with the invention for the surface treatment of workpieces 12 , such as for example, elongated sections having a round surface 14 .
  • the device 10 comprises three rolls 16 , 16 ′, 16 ′′ arranged parallel to and equispaced about the workpiece 12 , i.e. each staggered by 120°.
  • the three rolls 16 , 16 ′, 16 ′′ each comprise the same diameter in the example embodiment of the device 10 as shown in FIGS. 2 to 4 or 5 A. Accordingly, their longitudinal centerlines 18 , 18 ′, 18 ′′ are located on a common pitch circle 20 and thus each equispaced from the workpiece 12 , it being just as possible, however, that the diameter of the three rolls 16 , 16 ′, 16 ′′ varies.
  • the three rolls 16 , 16 ′, 16 ′ are provided at least in part with an outer profile 22 , 22 ′ working the surface 14 of the workpiece 12 .
  • the rolls 16 and 16 ′ are provided with one such outer profile 22 , 22 ′ whereas the roll 16 ′′ is configured non-profiled.
  • all three rolls 16 , 16 ′, 16 ′′ arranged parallel and equispeaced about the workpiece 12 to each other are provided with such an outer profile working the surface 14 of the workpiece 12 (not shown).
  • the two rolls 16 , 16 ′ are provided at least in part with an outer profile 22 , 22 ′ which works the surface 14 of the workpiece 12 in sequence in the opposite direction, i.e. shaping the surface 14 of the workpiece 12 first in one directio and then in the direction opposite thereto.
  • the beads 24 and recesses 26 of the outer profile 22 , 22 ′ of the two rolls 16 , 16 ′ are arranged inversed to each other, i.e. roughly crosswise.
  • the angle ⁇ of the outer profile 22 of the roll 16 is identical in magnitude to the angle ⁇ ′ of the outer profile 22 ′ of the roll 16 ′, angles ⁇ and ⁇ ′ differ by their sign and are consequently once positive and once negative, or vice-versa.
  • the angles ⁇ , ⁇ ′ are in the range 2° to 85°, preferably in the range 2° to 60° and more particularly in the range 2° to 10° inclusively.
  • angles ⁇ , ⁇ ′ of the pitch of the annular beads 24 and recesses 26 differ from each other in magnitude, so that for example, the angle ⁇ is 30° and the angle ⁇ ′ is 45°, whereby any other combination may be provided.
  • the beads 24 or recesses 26 are configured on the roll 16 leading from right-to-left and on the roll 16 ′ from left-to-right. To ensure movement of the workpiece 12 in such a substantially opposite leading position of the beads 24 and recesses 26 of the two adjoining rolls 16 , 16 ′, the two rolls 16 , 16 ′ can thus be powered in the same direction of rotation.
  • the two rolls 16 , 16 ′ can be powered in the opposite direction of rotation (not shown).
  • the workpiece 12 in the embodiment of the device 10 in accordance with the invention as shown in FIGS. 1 and 5 B is moved in the direction of the arrow 28 by the rolls 16 , 16 ′, 16 ′′ from right-to-left.
  • the rolls 16 , 16 ′ comprise two ends 30 , 32 which as evident from FIGS. 5B, 6A and 6 B, define the outer profile 22 , 22 ′ respectively.
  • the incoming end 30 and outgoing end 32 of the rolls 16 , 16 ′ in the direction of movement of the workpiece 12 as indicated by arrow 28 are configured non-profiled or smooth.
  • the incoming end 30 of the rolls 16 , 16 ′ comprises a slightly smaller outer diameter for compensating any irregularities of the workpiece 12 to be fed to the outer profile 22 , 22 ′ or for exerting a certain straightening function initially, whereas the outgoing end 32 of the rolls 16 , 16 ′ comprises a slightly larger diameter to bring the workpiece 12 coming from the region of the outer profile 22 , 22 ′ to a constant dimension, namely to the actual or desired design dimension of the workpiece 12 with an extremely smooth surface or low tolerance.
  • the roll 16 ′′ is provided full-length with a smooth surface.
  • Each of the rolls 16 , 16 ′, 16 ′′ is in this embodiment configured rotatable about their longitudinal centerlines 18 , 18 ′, 18 ′′ as is particularly evident from FIG. 5A .
  • the two rolls 16 , 16 ′ having the opposing outer profile 22 , 22 ′ can each be powered in the same direction, the roll 16 ′′ having an exclusively smooth surface being powered in the opposite direction of rotation.
  • the direction of rotation of the roll 16 ′′ having the exclusively smooth surface is selectable optional, however.
  • the rolls 16 , 16 ′, 16 ′′ are mounted as shown in FIG. 1 by a drive means 34 and a drive head 36 or by the same driving arrangement.
  • the drive means 34 is provided for rotatating each roll 16 , 16 ′, 16 ′′ individually about their longitudinal centerlines 18 , 18 ′, 18 ′′.
  • the drive head 36 or similar driving arrangement serve to rotate the rolls 16 , 16 ′, 16 ′′ in combination about the workpiece 12 .
  • the incoming end 30 of the rolls 16 , 16 ′, 16 ′′ is correspondingly non-rotatively mounted by a section 38 , for example, a square section, in a correspondingly formed, substantially snug-fit recess 40 (cf FIG. 3 ) in the hydraulic drive means 34 , whereas the outgoing end 32 of the rolls 16 , 16 ′, 16 ′′ is rotatively mounted each via a journal 42 in recesses 43 of the drive head 36 (cf. FIG. 2 ).
  • the drive means 34 is arranged upstream of the drive head 36 or similar driving arrangement in the direction of movement of the workpiece 12 as indicated by the arrow 28 .
  • the drive means 34 downstream of the drive head 36 or similar driving arrangement in the direction of movement of the workpiece 12 so that then the now incoming end 30 of the rolls 16 , 16 ′, 16 ′′ would be rotatively mounted in the drive head 36 and the then outgoing end 32 of the rolls 16 , 16 ′, 16 ′′ would be mounted non-rotatively in the drive means 34 .
  • the drive means 34 and/or drive head 36 or similar driving arrangement of the three rolls 16 , 16 ′, 16 ′′ is/are controlled hydraulically or pneumatically in the embodiment of the device 10 in accordance with the invention as shown in FIG. 1 .
  • Providing such a drive of the three rolls 16 , 16 ′, 16 ′′ permits infinitely variable control in avoiding all and any slip and thus a continuous smooth surface 14 of the workpiece 12 in its being treated.
  • One such hydraulic or pneumatic drive means 34 and/or hydraulically or pneumatically powered drive head 36 can be mounted particularly to advantage by, for example, a sealing arrangement as described in DE 196 10 809 A1.
  • the drive means 34 and/or drive head 36 is/are controllable via a control desk 44 .
  • the drive head 36 or similar driving arrangement as detailled in FIGS. 1 and 2 cooperates with a worm drive 48 .
  • the worm drive 48 and thus the drive head 36 are likewise powered hydraulically or pneumatically via a drive motor 50 .
  • the feed of the workpiece 12 is dicated likewise by the device 10 in accordance with the invention.
  • the drive means 34 and the drive head 36 are configured movable relative to each other.
  • the drive means 34 is configured longitudinally shiftable via a guide means 52 in the form of a guide rod or the like and a mechanically, electrically, hydraulically or pneumatically actuatable drive element 54 supported by a frame 56 of the device 10 .
  • the drive element 54 is preferably configured as a pressure cylinder to thus make it possible to undertake lengthwise compensation of the rolls 16 , 16 ′, 16 ′′ differing in length whilst maintaining the interchangeability of the rolls 16 , 16 ′, 16 ′′ and thus further enhance the flexibility of the device 10 .
  • the drive means 34 and drive head 36 are assigned additional centering means 58 .
  • the workpiece 12 moving at very high speed by the device 10 in accordance with the invention as indicated by the arrow 28 is stabilized by any vibrations produced by the surface treatment in the region of the rolls 16 , 16 ′, 16 ′′ being absorbed by the centering means 58 .
  • the rolls 16 , 16 ′, 16 ′′ are configured multi-part, the rolls 16 , 16 ′, 16 ′′ thus each comprising a shaft 60 with a stop 62 provided in the region of the section 38 .
  • the shaft 60 mounts a sleeve 64 either by the outer profile 22 , 22 ′, the incoming end 30 and the outgoing end 32 or by the entirety of the smooth surface.
  • the sleeve 64 is non-rotatively attached to the shaft 60 via a spline 66 . In the axial direction the sleeve 64 is locked to the shaft 60 by the stop 62 , a ring 68 and a nut 70 .
  • FIGS. 7A and 7B there is illustrated how in the embodiment of the device 10 in accordance with the invention only one roll, namely 16 ′′′ is provided at least in part with an outer profile 22 , 22 ′ for working the surface 14 of the workpiece 12 in sequence in the opposite direction, i.e. the surface 14 of the workpiece 12 first in one direction and then in the direction opposite thereto.
  • FIGS. 8A and 8B the example embodiment of the device 10 in accordance with the invention as shown therein differs from the embodiment as shown in FIGS. 1 to 6 C by the rolls 16 , 16 ′, 16 ′′ being used for surface treatment of a surface or in which of a bore 14 ′′ or similar opening, for example, a through-hole and/or blind hole such as the bore in an engine cylinder block of the workpiece 12 ′′.
  • the device 10 for surface treatment of such workpieces 12 ′ having at least one flat surface 14 ′ is configured in the example embodiment as shown in FIGS. 9A and 9B as a press or similar device.
  • the device 10 comprises a mounting device 72 in which a total of four pairs of rolls 74 , 74 ′, 74 ′′, 74 ′′′ are provided arranged in sequence in the direction of movement of the workpiece 12 ′ as indicated by the arrow 28 and provided at least in part with an outer profile 76 , 76 ′, 78 , 78 ′ working the surface 14 ′ of the workpiece 12 ′ as will now be detained in the following.
  • the rolls 74 , 74 ′, 74 ′′, 74 ′′′ are rotatively mounted about their longitudinal centerline 80 in a supporting frame 79 which is connected to a head 82 of the mounting device 72 .
  • the rolls 74 , 74 ′, 74 ′′, 74 ′′′ are arranged perpendicular to the direction of movement of the workpiece 12 ′ as indicated by the arrow 28 , although it is just as possible to arrange this at an angle ⁇ inclined thereto (not shown).
  • the angle ⁇ in the example embodiment as shown is thus 0°.
  • the mounting device 72 cooperates with a supporting means 84 assigned to the mounting device 72 opposite thereto and is provided as a so-called counterbearing for the workpiece 12 ′ in surface treatment thereof.
  • the supporting means 84 in the example embodiment as shown is likewise formed by a total of four pairs of rolls 86 , 86 ′, 86 ′′, 86 ′′′ correspondingly in number and arrangement to the four pairs of rolls 74 , 74 ′, 74 ′′, 74 ′′′.
  • the rolls 86 , 86 ′, 86 ′′, 86 ′′′ are thus likewise arranged in sequence in the direction of movement of the workpiece 12 ′ as indicated by the arrow 24 and provided at least in part with an outer profile 76 , 76 ′, 78 , 78 ′ working the surface 14 ′ of the workpiece.
  • the mounting device 72 is movable, i.e. height-adjustable relative to a guide means 88 , for example, in the form of guide rods 89 or the like and a mechanically, electrically, hydraulically or pneumatically actuatable drive element 90 , the actuatable drive element 90 preferably being configured as a pressure cylinder.
  • the mounting device 72 and/or the supporting means 84 is/are hydraulically or pneumatically controllable.
  • the pairs of rolls 74 , 74 ′′′ and 86 , 86 ′′′ respectively each comprising a smooth surface can be rotatably powered about the longitudinal centerline 80 by means of separate drive motors 92 .
  • the drive motors 92 in this arrangement are likewise preferably configured as hydraulic or pneumatic motors so that the feed of the workpiece 12 ′ is optionally, simultaneously but precisely and especially infinitely adjustable.
  • the rolls 74 ′ . 74 ′′ and 86 ′. 86 ′′ respectively are simply freely rotatively mounted in the supporting frame 79 of the mounting device 72 .
  • FIGS. 10A, 11 , 12 A and 12 B there is illustrated clearly how the rolls 74 , 74 ′′, 86 ′, 86 ′′ comprise the outer profile 76 , 76 ′, 78 , 78 ′ working the surface 14 ′ of the workpiece 12 ′ at least in part in the form of annular beads 94 and recesses 96 , whereby each of the rolls 76 , 76 ′, 78 , 78 ′ is adapted to the other.
  • the annular beads 94 and recesses 96 are arranged perpendicular to the longitudinal centerline 80 of the rolls 74 ′, 86 ′. Consequently, the annular beads 94 and recesses 96 of the rolls 76 ′, 86 ′ are oriented parallel in the direction of movement of the workpiece 12 ′ as indicated by the arrow 28 .
  • the annular beads 94 and recesses 96 are arranged at an angle ⁇ or ⁇ ′ to the longitudinal centerline 80 of the rolls 74 ′′, 86 ′′ in accordance with the example embodiment as shown in FIG. 1 . Consequently, the annular beads 94 and recesses 96 are provided pitched or inclined to the direction of movement of the workpiece 12 ′ as indicated by the arrow 28 , whereby the beads 94 and recesses 96 are arranged opposing, i.e. crosswise.
  • the rolls 74 ′, 86 ′ or 74 ′′, 86 ′′ having the outer profile 76 , 76 ′, 78 , 78 ′ are arranged in pairs in sequence in the direction of movement of the workpiece 12 ′ as indicated by the arrow 28 such that the surface 14 ′ of the workpiece 12 ′ is worked in sequence in the opposite direction.
  • the surface 14 ′ of the workpiece 12 ′ is consequently shaped roughly transversely to the direction of movement of the workpiece 12 ′ as indicated by the arrow 28 once in the one direction and then back in the opposite direction.
  • the rolls 74 , 74 ′′′ and rolls 86 , 86 ′′′ are arranged upstream and/or dowstream of the rolls 74 ′, 74 ′′ and 86 ′, 86 ′′ respectively having the corresponding outer profile 76 , 76 ′ and 78 , 78 ′ respectively in the direction of movement of the workpiece 12 ′ as indicated by the arrow 28 .
  • the rolls 70 and 86 incoming in the direction of movement are configured, however, with a slightly smaller outer diameter whereas the outgoing rolls 70 ′′′ and 86 ′′′ respectively are configured in the direction of movement with a sightly larger outer diameter.
  • the rolls 74 ′, 86 ′ assigned to each other may be configured with outer profiles 76 and 76 ′ respectively etc. different from each other, the same applying correspondingly to the rolls 74 ′′, 86 ′′.
  • FIGS. 13A and 13B there is illustrated the steps in the method in which the surface treatment in accordance with the invention and the corresponding device in accordance with the invention is integrated.
  • the workpiece 12 , 12 ′ is extruded preferably from aluminum in a press 98 and then worked by cooling in a bath 100 and then straightened in a straightening bench 102 before then being surface treated in a device 10 in accordance with the invention, after which it is shaped in a shaping bench 104 and finally cut to length in a cutting means 106 .
  • the method as shown in FIG. 13B differs from that as shown in FIG. 13A only by the workpiece 12 , 12 ′ after surface treatment in the device 10 in accordance with the invention being directly coiled on a reel 108 .
  • This is possible for the first time by the device 10 in accordance with the invention since the workpiece 12 , 12 ′ is worked by no rotation in itself, it instead being moved only straight in the longitudinal direction as indicated by the arrow 28 .
  • the method and device 10 in accordance with the invention are particularly suitable for mass production of elongated sections, such as for example, automotive headrest brackets or the like made preferably of aluminum or alloys thereof. More particularly the headrests produced as such are characterized by an especially high strength, on the one hand, and, on the other, by being pliant to a certain degree so that head injuries of the vehicle occupants can be avoided when the vehicle is involved in a head-on collision.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • ing And Chemical Polishing (AREA)
US11/196,727 1998-09-23 2005-08-04 Method for treating the surface of metal workpieces with compressive and tensile stresses Abandoned US20050274165A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/196,727 US20050274165A1 (en) 1998-09-23 2005-08-04 Method for treating the surface of metal workpieces with compressive and tensile stresses

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE19843630 1998-09-23
DE19857626A DE19857626C2 (de) 1998-09-23 1998-12-14 Verfahren und Vorrichtung zur Oberflächenbehandlung von länglichen Profilen sowie deren Verwendung
DE19857626.9 1998-12-14
DE19843630.0 1998-12-14
PCT/EP1999/007107 WO2000016920A1 (de) 1998-09-23 1999-09-23 Verfahren und vorrichtung zur oberflächenbehandlung von werkstücken sowie deren verwendung
US78781901A 2001-03-23 2001-03-23
US11/196,727 US20050274165A1 (en) 1998-09-23 2005-08-04 Method for treating the surface of metal workpieces with compressive and tensile stresses

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP1999/007107 Continuation WO2000016920A1 (de) 1998-09-23 1999-09-23 Verfahren und vorrichtung zur oberflächenbehandlung von werkstücken sowie deren verwendung
US78781901A Continuation 1998-09-23 2001-03-23

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US20050274165A1 true US20050274165A1 (en) 2005-12-15

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US11/196,727 Abandoned US20050274165A1 (en) 1998-09-23 2005-08-04 Method for treating the surface of metal workpieces with compressive and tensile stresses

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US (1) US20050274165A1 (sk)
EP (1) EP1117494B1 (sk)
JP (1) JP2002526262A (sk)
CN (1) CN1326388A (sk)
AT (1) ATE297270T1 (sk)
AU (1) AU5981699A (sk)
CZ (1) CZ20011096A3 (sk)
DE (1) DE19981858D2 (sk)
SK (1) SK4242001A3 (sk)
WO (1) WO2000016920A1 (sk)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112934957A (zh) * 2021-01-22 2021-06-11 傅章为 一种铝合金的冷轧机构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10059021C2 (de) * 2000-11-28 2002-10-24 Kurt Kemper Verfahren und Vorrichtung zur kontinuierlichen Herstellung von Werkstücken aus einem unprofilierten Längsprofil sowie deren Verwendung
DE10220174A1 (de) * 2002-05-06 2003-12-04 Kurt Kemper Verfahren und Vorrichtung zur Herstellung eines Einsatzes für Sicherheits- oder Schutzschuhe und ein solcher Einsatz
CN108856346B (zh) * 2018-07-03 2023-08-15 庆云创汇精工科技有限公司 一种奥氏体不锈钢丝前处理系统

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US2189578A (en) * 1938-02-26 1940-02-06 Porcelain Strip Mills Inc Method and apparatus for reclaiming sheet metal
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US3606780A (en) * 1967-11-28 1971-09-21 Kichisaburo Nagahara Method for manufacturing helical pipe for heat exchangers
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GB478099A (en) * 1936-04-22 1938-01-12 Schloemann Ag Improvements in or relating to the removal of scale from rolled metal, more particularly from billets or blooms
DE886585C (de) * 1941-11-04 1953-08-17 Administration Sequestre Des R Entzunderungseinrichtung fuer Werkstuecke
US2897707A (en) * 1955-04-19 1959-08-04 Reiff & Nestor Company Apparatus for sizing and finishing bar stock
FR1327289A (fr) * 1962-04-07 1963-05-17 Procédé de décapage mécanique et appareillage pour la réalisation de ce procédé
NL290761A (sk) * 1963-03-12
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US1196343A (en) * 1914-12-29 1916-08-29 Goldschmidt Detinning Company Apparatus for disintegrating metal articles.
US2189578A (en) * 1938-02-26 1940-02-06 Porcelain Strip Mills Inc Method and apparatus for reclaiming sheet metal
US2256267A (en) * 1939-06-08 1941-09-16 Claude C Rhodes Enamel removing means
US3606780A (en) * 1967-11-28 1971-09-21 Kichisaburo Nagahara Method for manufacturing helical pipe for heat exchangers
US3845533A (en) * 1970-12-09 1974-11-05 L Tinfow Method of and apparatus for conditioning the surfaces of thin materials

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112934957A (zh) * 2021-01-22 2021-06-11 傅章为 一种铝合金的冷轧机构

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EP1117494A1 (de) 2001-07-25
DE19981858D2 (de) 2002-01-31
CZ20011096A3 (cs) 2002-01-16
WO2000016920A1 (de) 2000-03-30
SK4242001A3 (en) 2002-07-02
EP1117494B1 (de) 2005-06-08
ATE297270T1 (de) 2005-06-15
AU5981699A (en) 2000-04-10
CN1326388A (zh) 2001-12-12
JP2002526262A (ja) 2002-08-20

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