US3374295A - Method of heating of rolling mill rolls for the rolling of heated metal particles - Google Patents

Method of heating of rolling mill rolls for the rolling of heated metal particles Download PDF

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Publication number
US3374295A
US3374295A US522722A US52272266A US3374295A US 3374295 A US3374295 A US 3374295A US 522722 A US522722 A US 522722A US 52272266 A US52272266 A US 52272266A US 3374295 A US3374295 A US 3374295A
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US
United States
Prior art keywords
heating
rolling
rolls
metal particles
roll gap
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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.)
Expired - Lifetime
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US522722A
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English (en)
Inventor
Gehring Eckard
Kaiser Oswald
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Schloemann AG
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Schloemann AG
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 Schloemann AG filed Critical Schloemann AG
Application granted granted Critical
Publication of US3374295A publication Critical patent/US3374295A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers

Definitions

  • ABSTRACT OF THE DISCLOSURE A method of rolling strips and sections from heated metal particles by so adjusting the roll gap that the heated metal particles can pass through in contact with the rolls but Without deformation, thereby heating the rolls, and then readjusting the roll gap and rolling the particles to the desired form and dimensions.
  • the particles first passed through, being unchanged, may be immediately rolled in the second stage.
  • Heated protective gas may be supplied to the furnace that heats the granules.
  • This invention relates to a method of heating the rolls of a rolling mill for the production of strips or sections in a plant consisting of a rolling mill preceded by a continuous heating or pusher-type furnace for the heating of metal particles.
  • the heating of the rolls before the actual commencement of rolling is necessary in order that they may not be damaged by stress cracks, and thereby become useless, as a result of local heating in conjunction with the roll pressure.
  • the heating of the rolls is usually effected in a known manner by means of gas-burners.
  • the object of the invention is to enable the heating of the rolls to be carried out without supplementary appliances which would not be required for the actual rolling process.
  • this result is obtained by enlarging the roll gap, before the commencement of the rolling operation, by adjusting the rolls, to such an extent that the heated metal particles, passing from the furnace outlet into the roll gap and coming contact with the external surfaces of the rolls, pass through the roll gap without deformation.
  • supplementary devices designed for this purpose are not required. Since, moreover, before the commencement of rolling, constant temperature and passage conditions of the particles are expected at the outlet, the heat of the metal particles leaving the furnace during this time admits of being advantageously utilised.
  • the hot protective gas under the atmosphere of which the particles of certain metals, such for instance as steel or copper, are supplied to the roll gap during the rolling operation.
  • the metal particles, from the furnace outlet to the roll gap are in any case enclosed by a shaft which is filled with protective gas. This shaft accordingly forms at the same time the supply conduit for the protective gas for heating the rolls.
  • metal particles and protective 3,374,295 Patented Mar. 19, 1968 gas may advantageously be supplied to the rolls at the same time to heat them.
  • 1 denotes a tubular furnace constructed as a continuous-heating or pusher-type furnace, which bears with its outer casing upon rollers 3 which can be driven, and revolves about its axis 4. Owing to the inclination of the furnace from the horizontal, the metal particles 5 travel from the furnace inlet 6 to the furnace outlet 7, where they fall into the roll gap 8 between a pair of rolls 9 of a rolling mill.
  • the metal particles 5 are supplied from a storage receptacle, constructed as a hopper 11, to a shaking conveyor channel 12, and from there to the furnace inlet 6. Between the furnace outlet 7 and the pair of rolls 9 is arranged a feed shaft 13 surrounding the stream of particles 5. In the neighbourhood of the mouth of the furnace the feed shaft is provided with a pipe connection 14, through which protective gas is supplied to the furnace and to the feed shaft in the direction of the arrow 15.
  • the rolls 9 are adjusted to such a distance apart that the remaining roll gap 8 just allows the current of particles 5 coming from the furnace outlet 7 to pass through without deformation.
  • the metal particles 5 By the impact of the metal particles 5 upon the roll surfaces 16, and by their thermal radiation, they heat up the rolls 9, which are already revolving during this heating process.
  • the metal particles 5 As soon as the metal particles 5 have left the rolls 9 they are brought by a delivery device 17 out of the neighbourhood of the rolls 9 and delivered into a collecting vessel 18 for example, which is installed beside the rolling mill.
  • the roll gap is adjusted to correspond to the thickness of the desired strip or section, and now the actual rolling operation is started.
  • a method of heating the rolls of a rolling mill for the production of strips or sections from metal particles comprising: heating the metal particles in a downwardly inclined tubular furnace, admitting heated protective gas to the tubular furnace, adjusting the roll gap of the rolling mill to such a width that the heated particles can pass through it in contact with the roll surfaces without deformation, passing the heated particles, before the commencement of rolling, through the enlarged roll gap, with the rolls revolving, and at the same time causing a current of heated protective gas to impinge upon the roll surfaces.
  • a method of rolling strips and sections in a rolling mill from heated metal particles comprising the steps of: adjusting the roll gap between the rolls to such a distance that the metal particles can pass through the roll gap without deformation, rotating the rolls while passing the heated particles through the roll gap and thereby heating the rolls, then readjusting the roll gap to the distance requisite for the deformation and consolidation of the particles, and finally passing the particles through the readjusted roll gap.
  • a method of rolling strips and sections in a rolling mill from heated metal particles comprising the steps of: adjusting the roll gap between the rolls to such a distance that the metal particles can pass through the roll gap in contact with the rolls without deformation, heating the metal particles by passing them through a continuous heating furnace, supplying heated protective gas to the furnace, then readjusting the roll gap to the distance requisite for the deformation and consolidation of the particles, and

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US522722A 1965-01-23 1966-01-24 Method of heating of rolling mill rolls for the rolling of heated metal particles Expired - Lifetime US3374295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESC036423 1965-01-23

Publications (1)

Publication Number Publication Date
US3374295A true US3374295A (en) 1968-03-19

Family

ID=7433866

Family Applications (1)

Application Number Title Priority Date Filing Date
US522722A Expired - Lifetime US3374295A (en) 1965-01-23 1966-01-24 Method of heating of rolling mill rolls for the rolling of heated metal particles

Country Status (3)

Country Link
US (1) US3374295A (de)
DE (1) DE1483713A1 (de)
GB (1) GB1094246A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108941544A (zh) * 2017-05-18 2018-12-07 通用电气公司 粉末制备方法及其装填设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US530094A (en) * 1894-12-04 Method of and apparatus for rolling sheet metal
US1370331A (en) * 1921-03-01 mckibbin
US2933305A (en) * 1957-12-17 1960-04-19 Republic Steel Corp Apparatus for making flattened elongate metallic bodies with finished edges from powdered metal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US530094A (en) * 1894-12-04 Method of and apparatus for rolling sheet metal
US1370331A (en) * 1921-03-01 mckibbin
US2933305A (en) * 1957-12-17 1960-04-19 Republic Steel Corp Apparatus for making flattened elongate metallic bodies with finished edges from powdered metal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108941544A (zh) * 2017-05-18 2018-12-07 通用电气公司 粉末制备方法及其装填设备

Also Published As

Publication number Publication date
GB1094246A (en) 1967-12-06
DE1483713A1 (de) 1969-10-09

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