GB2035853A - Method and apparatus for indicating and eliminating defects on metal slabs - Google Patents

Method and apparatus for indicating and eliminating defects on metal slabs

Info

Publication number
GB2035853A
GB2035853A GB7933353A GB7933353A GB2035853A GB 2035853 A GB2035853 A GB 2035853A GB 7933353 A GB7933353 A GB 7933353A GB 7933353 A GB7933353 A GB 7933353A GB 2035853 A GB2035853 A GB 2035853A
Authority
GB
United Kingdom
Prior art keywords
defects
slabs
eliminating
slab
indicating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB7933353A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SSAB Svenskt Stal AB
Original Assignee
SSAB Svenskt Stal AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SSAB Svenskt Stal AB filed Critical SSAB Svenskt Stal AB
Publication of GB2035853A publication Critical patent/GB2035853A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9093—Arrangements for supporting the sensor; Combinations of eddy-current sensors and auxiliary arrangements for marking or for rejecting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details

Landscapes

  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Forging (AREA)
  • Brushes (AREA)

Abstract

Method and apparatus for determining and possibly eliminating defects on metal slabs, whereby at least the upper and lower sides of the slab are subdivided into different areas by means of a bi-dimensional system of coordinates. The maximum depth of defects is determined for each area by using at least one device finding the defects, and the data obtained are stored in a memory. Facilities are provided for eliminating the defects by processing, or for eliminating a defective part of a slab or an entire slab as scrap-iron. These facilities are operated on the basis of the maximum depth of defects of each area and slabs which are partially or partially discarded as scrap-iron are replaced by new slabs in view of the rolling program selected. The slabs from which defective parts have been removed are fed back to the rolling process as new slabs.
GB7933353A 1978-02-06 1979-02-06 Method and apparatus for indicating and eliminating defects on metal slabs Withdrawn GB2035853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7801369A SE7801369L (en) 1978-02-06 1978-02-06 AUTOMATIC ERROR INDICATION AND ERROR REMOVAL OF METALLIC SUBSTANCES

Publications (1)

Publication Number Publication Date
GB2035853A true GB2035853A (en) 1980-06-25

Family

ID=20333880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7933353A Withdrawn GB2035853A (en) 1978-02-06 1979-02-06 Method and apparatus for indicating and eliminating defects on metal slabs

Country Status (12)

Country Link
JP (1) JPS55500087A (en)
BE (1) BE873928A (en)
DE (1) DE2934886D2 (en)
DK (1) DK47779A (en)
FI (1) FI790266A (en)
FR (1) FR2416081A1 (en)
GB (1) GB2035853A (en)
IT (1) IT1188753B (en)
NL (1) NL7900751A (en)
NO (1) NO790343L (en)
SE (1) SE7801369L (en)
WO (1) WO1979000592A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002866A1 (en) * 1980-01-28 1981-07-30 Th. Kieserling & Albrecht, 5650 Solingen METHOD FOR ELIMINATING SURFACE DEFECTS ON WAYRM-ROLLED, METAL PROFILES AND LONG-EDGED CASTING WORKPIECES AND SYSTEM FOR IMPLEMENTING THE METHOD

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1367783A (en) * 1971-09-21 1974-09-25 Impresa Bocami Di Garibaldo At Automatic selective apparatus for scarfing semifinished products
DD95542A1 (en) * 1972-03-23 1973-02-12
DE2431173A1 (en) * 1974-06-28 1976-01-15 Graenges Staal Oxeloesund PROCESS AND DEVICE FOR PRODUCING METALLIC BLANKS, IN PARTICULAR STEEL SLABS, THAT ARE SUBSTANTIALLY FREE OF DEFECTS IN AT LEAST A DETERMINED SURFACE AREA
JPS514047A (en) * 1974-07-01 1976-01-13 Nippon Steel Corp Kinzokuhenno hyomenketsukanbuteireho
DE2439662C3 (en) * 1974-08-19 1978-10-12 Graenges Oxeloesunds Jaernverk Ab, Oxeloesund (Schweden) Device for the non-destructive testing of metallic blanks for surface defects

Also Published As

Publication number Publication date
NL7900751A (en) 1979-08-08
DK47779A (en) 1979-08-07
JPS55500087A (en) 1980-02-14
FR2416081A1 (en) 1979-08-31
BE873928A (en) 1979-05-29
NO790343L (en) 1979-08-07
FI790266A (en) 1979-08-07
WO1979000592A1 (en) 1979-08-23
IT7909335A0 (en) 1979-02-05
IT1188753B (en) 1988-01-28
DE2934886D2 (en) 1980-12-18
SE7801369L (en) 1979-08-24

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)