Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/16—Adjusting or positioning rolls
  • B21B31/18—Adjusting or positioning rolls by moving rolls axially
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
  • B21B13/008—Skew rolling stands, e.g. for rolling rounds
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B2271/00—Mill stand parameters
  • B21B2271/02—Roll gap, screw-down position, draft position

Definitions

• the present invention relates to a roller head according to the preamble of claim 1.
• Roller heads according to the object of the invention are used in planetary rolling arrangements, where the employed rolling members are mainly conical rollers.
• Typical prior art roller heads are introduced among others in the following patent publications: US 3,718,020, US 3,735,617 and US 4,587,820.
• a drawback is that said methods are very complicated, and/or that the axial adjustment of the roller is inaccurate owing to the employed coupling member arrangements of the adjusting apparatus.
• Prior art solutions have mainly utilized cogged coupling members for coupling the adjusting axis. Owing to the coupling arrangements of known solutions, the axial adjustment has become stepped. This has lead to a situation where the minimum quantity of the axially directed motional shift has been dependent on the cogging of the coupling member. Moreover, in prior art solutions, it has been troublesome to accurately measure the adjustment to be performed.
• the object of the present invention is to achieve a completely new type of arrangement for enabling an advanced and more accurate method for performing the axial adjustment of a roller head.
• Another object of the invention is to achieve a roller head that enables the measurement of the axial adjustment in an easy and accurate manner.
• the roller head according to the invention has several remarkable advantages.
• the adjusting arrangement according to the invention enables an extremely accurate and stepless axial adjustment. When applying a stepless locking of the adjusting axis, there is achieved a remarkably higher axial distance and centering accuracy for the rollers than in the prior art arrangements.
• an expansible sleeve member as the locking member, there is achieved an extremely feasible solution for a locking member.
• a pressure-operated sleeve member and particularly by employing a liquid as the pressure medium, said liquid being for instance hydraulic oil, there is achieved a suitable arrangement to be used in connection with the roller head. This solution enables a situation where the locking member constitutes a uniform piece with the adjusting member, or a situation where the locking member is a separate sleeve member between the adjusting axis and the outer axis.
• Figure 1 illustrates a cross-section of a roller head according to the invention
• Figure 2 illustrates an enlarged detail A of figure 1.
• the roller head illustrated in the drawings is a roller head used in the so-called PSW rolling mill (Planeten Schragwalzwerk, planetary skew-rolling mill). Typically a PSW rolling mill includes three roller heads.
• the roller head 1 is arranged turnably in the rotor (not illustrated).
• the roller head 1 comprises a housing 8, inside which housing there is rotatably arranged a hollow outer axis 5 and means 2, 3, 4 for rotating said outer axis, as well as a center axis 6 arranged inside said outer axis, in a manner that transmits the rotary motion of said outer axis; said center axis 6 is movable in the axial direction and lockable in the axial direction, and it is also provided with a roller 7.
• a drive wheel 3 In the operating axis 2 of the roller head, there is arranged a drive wheel 3, the rotary motion whereof is transmitted by means of a counterwheel 4 to the hollow outer axis 5 of the roller head.
• the outer axis 5 is arranged rotatably inside the housing 8 of the roller head 1 by intermediation of bearing members 9, 10, 11.
• the outer axis 6 of the roller head is rotatably arranged in the roller head housing, at least by two radial-thrust bearings 9, 11 , and by an axial bearing 10 provided therebetween.
• the roller 7 is arranged in the center axis 6.
• the roller head is characterized by an adjusting axis 16, which is arranged rotatably at that head of the outer axis 5 that is located at the opposite end with respect to the roller 7, said adjusting axis being essentially locked in the axial direction and comprising a counterpart 17 for the threaded section 15 provided in the center axis 6; said adjusting axis 16 includes a locking member 18, which in the locking position forms a friction coupling at least between the adjusting axis 16 and the outer axis 5.
• an adjusting axis 16 comprising a counterpart 17 for the threaded section 15 of the center axis 6.
• the position of the center axis 6 in the axial direction can be adjusted by turning the adjusting axis 16.
• the position of the center axis 6 is changed for a distance determined by the thread of the threaded section and the counterpart, depending on the volume of the rotary motion of the adjusting axis.
• the threads of the threaded section and the counterpart are extremely precise, for instance so-called trapezoidal threads.
• the adjusting axis 16 comprises a locking member, such as a sleeve member 18, whereby the adjusting axis can be steplessly locked in the outer axis 5.
• the locking member 18 is typically an expansible, pressure-operated sleeve member.
• the locking member 18 is a hydraulically operated sleeve member.
• the locking member 18 constitutes a uniform piece with the adjusting axis 16.
• the locking member can also be a separate sleeve member located between the outer axis 5 and the adjusting axis 16.
• the sleeve member 18 By means of the sleeve member 18, for instance the winding of the adjusting axis is prevented, and thus also the center axis 6 is locked in the axially adjusted position.
• the adjusting axis 16 comprises members, such as shoulders 19, 20, in order to prevent it from shifting in the axial direction, at least during the adjusting process.
• Figure 2 shows part of the roller head in cross-section.
• Figure 2 also shows a typical embodiment of the structure of the locking member 18.
• the locking member illustrated in the drawing is a so-called hydraulically operated sleeve member.
• a fluid channel system 21 , 22, 23 with some hydraulic fluid provided therein.
• the sleeve 18 is at least partly expanded in the radial direction and attached, at the outer surface 18', to the countersurface, which in the case according to the invention is the typically cylindrical surface 5' located in the bore of the outer axis 5.
• the sleeve member 18 can form part of the adjusting axis 16, in which case it in the fastening position radially affects the outer axis 5 located outside said sleeve member, or it can be a separate sleeve member, in which case the sleeve member 18, by increasing pressure, radially affects the adjusting axis 16 located inside it, as well as the outer axis 5 located outside it.
• the invention is operated so that the adjusting axis 16 is locked, while the rolling mill center axis 6 is adjusted at a desired point, to the outer axis 5 by means of the locking member 18, most suitably by a friction coupling, in which case also the center axis 6 is locked in the axial direction.
• the expansive sleeve 18 serving as the locking member is pressurized by tightening the adjusting screw 24, so that the sleeve is expanded and forms a friction coupling.
• the adjusting screw 24 is screwed open, in which case the sleeve 18 is contracted and the friction coupling is released, and the adjusting axis 16 can again be turned.
• the axial motion of the rolling mill center axis 6 can be created and measured extremely accurately by providing, for the duration of the adjusting process, an installation device 25 coupled to a measuring device 26.
• the installation device includes a torsion shaft 27 comprising a counterpart 29 for the driver 28 of the adjusting axis 14.
• the volume of the axial motion of the center axis is obtained when the size of the rotary motion of the adjusting axis is measured.
• the measuring device 26 is arranged to directly indicate the volume of the axial motion at a typical accuracy of for instance 0.01 mm.
• the roller head according to the invention By means of the roller head according to the invention, the axial adjustment is carried out more accurately than in the prior art.
• the adjusting process is carried out quickly and precisely.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Rolls And Other Rotary Bodies (AREA)
• Friction Gearing (AREA)
• Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
• Support Of The Bearing (AREA)
• Retarders (AREA)
• Metal Rolling (AREA)
• Electrolytic Production Of Metals (AREA)
• Crushing And Grinding (AREA)
• Supporting Of Heads In Record-Carrier Devices (AREA)

Priority Applications (11)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8555783

Family Applications (1)

Country Status (22)

Families Citing this family (4)

Citations (5)

Family Cites Families (8)

• 1999
  • 1999-12-21 FI FI992740A patent/FI109528B/fi not_active IP Right Cessation
• 2000
  • 2000-03-03 EP EP00104716A patent/EP1110632B1/en not_active Expired - Lifetime
  • 2000-03-03 DE DE60012675T patent/DE60012675T2/de not_active Expired - Lifetime
  • 2000-03-03 ES ES00104716T patent/ES2224938T3/es not_active Expired - Lifetime
  • 2000-03-03 AT AT00104716T patent/ATE272455T1/de active
  • 2000-12-20 CN CNB008176426A patent/CN1167523C/zh not_active Expired - Lifetime
  • 2000-12-20 KR KR1020027007862A patent/KR100717560B1/ko not_active Expired - Fee Related
  • 2000-12-20 JP JP2001546806A patent/JP4732657B2/ja not_active Expired - Fee Related
  • 2000-12-20 MX MXPA02006041A patent/MXPA02006041A/es active IP Right Grant
  • 2000-12-20 US US10/168,186 patent/US6666060B2/en not_active Expired - Lifetime
  • 2000-12-20 RS YUP-481/02A patent/RS50106B/sr unknown
  • 2000-12-20 EA EA200200674A patent/EA003483B1/ru not_active IP Right Cessation
  • 2000-12-20 CA CA002393822A patent/CA2393822C/en not_active Expired - Lifetime
  • 2000-12-20 BR BR0016541-7A patent/BR0016541A/pt not_active IP Right Cessation
  • 2000-12-20 UA UA2002065196A patent/UA73755C2/uk unknown
  • 2000-12-20 AU AU23793/01A patent/AU780876B2/en not_active Ceased
  • 2000-12-20 CZ CZ20021993A patent/CZ296614B6/cs not_active IP Right Cessation
  • 2000-12-20 WO PCT/FI2000/001124 patent/WO2001045872A1/en not_active Ceased
  • 2000-12-20 TR TR2002/01611T patent/TR200201611T2/xx unknown
  • 2000-12-20 PL PL355661A patent/PL197816B1/pl unknown
  • 2000-12-20 SK SK858-2002A patent/SK285521B6/sk not_active IP Right Cessation
• 2002
  • 2002-06-10 BG BG106808A patent/BG64082B1/bg unknown

Patent Citations (5)

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