Classifications

• • 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
  • B21B45/08—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 hydraulically

Definitions

• the invention relates to a device for descaling semi-finished products with the features of the preamble of claim 1.
• This distance is comparatively large in the known device. This reduces the jet pressure of the high pressure water on the workpiece. A sufficiently high jet pressure can only be achieved by increasing the water pressure or the amount of water, which means a large amount of energy is used. A reduction in the distance of the nozzle device from the belt surface is not possible because of the risk of collision described above.
• the invention has for its object to design a device of the type described so that the distance between the belt surface and the nozzle device can be reduced.
• Claim 1 serves to achieve this object.
• the nozzle device is automatically adjusted due to its movable arrangement to a movement with a vertical component above the surface of the semi-finished product of an unevenness of the band or a bulge at the beginning of the band while maintaining a preselected small desired distance from the control device ⁇ leads.
• This has the result that the jet pressure present on the workpiece is increased when the jet pressure is kept the same at the nozzle outlet.
• the water pressure in the nozzle or the amount of water can thus be reduced when using the invention, which simultaneously leads to a reduction in cooling, in particular in the case of thin-walled semi-finished products (thin slabs).
• the distance compared to a distance of the nozzle device in the range of 250 mm in the known device can be reduced to 20 to 40 mm, that is to say to a tenth. This leads to very significant advantages both in terms of the quality of descaling and in terms of reducing water and energy consumption and avoiding unnecessary cooling of the semi-finished product.
• nozzle device itself is designed as described in DE 43 28 303 A1.
• a scale removal device also tracks the curvatures or unevenness of the semi-finished product in the same way.
• the scale removal device can be designed in the same way as the nozzle device with a vertical component movable above the surface of the strip passing underneath.
• the invention is explained in more detail below with reference to the drawing with further details.
• the single figure shows a schematic side view seen in the direction transverse to the direction of movement of the band to be ignited, a device according to the invention.
• a belt-shaped thin slab 4 in. Is on a roller table 2
• the slab 4 has a bulge 8 which can extend over a partial width or over the entire width of the slab 4.
• a nozzle device Arranged above the slab 4 and at a distance a therefrom is a nozzle device which, overall, corresponds to the reference character 10 is designated.
• the nozzle device 10 has a plurality of nozzle heads 12 arranged in a row transversely to the direction of movement 6, each of which is equipped with a total of four nozzles 14 uniformly distributed on the circumference for spraying high-pressure water. Only such a nozzle head 12 can be seen in the drawing. The overall arrangement is more clearly described in DE 43 28 303 AI.
• nozzle heads are attached to a beam arranged rigidly above the roller table 2, according to the invention they are attached to a beam 16 which can be raised and lowered vertically in the direction of the arrow 21 by means of a parallel linkage with links 18, 20 a stationary support 23 is held.
• a hydraulic cylinder 22 acts on the upper link 20 of the parallel linkage rod.
• a scale removal device designated overall by reference numeral 24, is shown at 24.
• This tinder removal device has a collecting housing 26 for tinder bounced off the slab surface with an impact surface 28 from which the tinder mixed with the high-pressure water is deflected into a discharge trough 30.
• the housing 26 is attached to a vertical bar 32.
• This bar 32 is suspended on the support 23 via a parallel linkage linkage with links 34, 36.
• the lower link 34 is acted upon by a hydraulic cylinder 38.
• a displacement transducer 40 is formed at the front end of the scale removal device.
• This displacement sensor detects the vertical distance a between the nozzle device 10 or the scale removal device 24 and the strip surface.
• the displacement sensor can be designed mechanically, optically or electrically in a known manner and converts the detected distance into an electrical signal which is fed into a control device 44 via a signal line 42.
• This control device is at a desired target distance a at 46 adjustable.
• the control device 44 compares the measured actual distance with the set target distance and provides actuating signals for reducing the detected deviation to zero, which are led via signal lines 48, 49 to the cylinders 22, 38 and these for lifting or lowering affect the bars 16 and 32 respectively. In this way, the nozzle device 10 and the scale removal device 24 are always held at a desired distance from the surface of the slab 4 even if it has a bulge 8.
• a target distance a is expediently 20 to 40 mm.
• the bulges or unevenness 8 are often not evenly distributed over the entire strip width.
• multi-part devices consisting of independent sections consisting of the bars 16, 24 with the parallel linkage rods and cylinders can be provided.
• All of the modules described, including couplings, hoses and electrical feed lines, can be accommodated in a common housing 50. Wearing parts such as skids 52 of the scale removal device 24 and deflector plates 54, 56 are arranged interchangeably.
• the device according to the invention by means of a hoist, as a crane, forms from the roller table 2 can be lifted out ⁇ be. This means that maintenance and control work as well as tests can be carried out away from the roller table, for example in a workshop.

Landscapes

• Mechanical Engineering (AREA)
• Engineering & Computer Science (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
• Spray Control Apparatus (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Supplying Of Containers To The Packaging Station (AREA)
• Vending Machines For Individual Products (AREA)
• Control And Other Processes For Unpacking Of Materials (AREA)
• Nozzles (AREA)
• Apparatuses And Processes For Manufacturing Resistors (AREA)
• Metal Rolling (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Heat Treatments In General, Especially Conveying And Cooling (AREA)
• Processing Of Solid Wastes (AREA)
• Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
• Adornments (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=7773230

Family Applications (1)

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Family Cites Families (25)

• 1995
  • 1995-09-26 DE DE19535789A patent/DE19535789C2/de not_active Expired - Fee Related
• 1996
  • 1996-09-20 ES ES96933348T patent/ES2135921T3/es not_active Expired - Lifetime
  • 1996-09-20 DE DE59602292T patent/DE59602292D1/de not_active Expired - Fee Related
  • 1996-09-20 CA CA002233085A patent/CA2233085A1/fr not_active Abandoned
  • 1996-09-20 JP JP9513126A patent/JPH11513311A/ja active Pending
  • 1996-09-20 BR BR9610717A patent/BR9610717A/pt not_active IP Right Cessation
  • 1996-09-20 KR KR10-1998-0702232A patent/KR100426979B1/ko not_active IP Right Cessation
  • 1996-09-20 WO PCT/EP1996/004126 patent/WO1997011797A1/fr active IP Right Grant
  • 1996-09-20 AU AU72121/96A patent/AU728947B2/en not_active Ceased
  • 1996-09-20 EP EP96933348A patent/EP0852521B1/fr not_active Expired - Lifetime
  • 1996-09-20 US US09/043,495 patent/US6029681A/en not_active Expired - Fee Related
  • 1996-09-20 CN CN96197229A patent/CN1120063C/zh not_active Expired - Fee Related
  • 1996-09-20 AT AT96933348T patent/ATE181521T1/de not_active IP Right Cessation
  • 1996-09-24 TW TW085111653A patent/TW312634B/zh active
  • 1996-09-25 ZA ZA968047A patent/ZA968047B/xx unknown
• 1998
  • 1998-03-25 MX MX9802351A patent/MX9802351A/es unknown

Non-Patent Citations (1)

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