US1808957A - Manufacture of seamless tubes - Google Patents

Manufacture of seamless tubes Download PDF

Info

Publication number
US1808957A
US1808957A US181010A US18101027A US1808957A US 1808957 A US1808957 A US 1808957A US 181010 A US181010 A US 181010A US 18101027 A US18101027 A US 18101027A US 1808957 A US1808957 A US 1808957A
Authority
US
United States
Prior art keywords
mill
seamless tubes
manufacture
reducing
thickness
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.)
Expired - Lifetime
Application number
US181010A
Inventor
Kunst Wilhelm
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1808957A publication Critical patent/US1808957A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling

Definitions

  • My invention relates to the manufacture of seamless tubes by rolling and has for its object to simplify and expedite the production.
  • the present invention differs fundamentally from the foregoing in that the thick walled tubular blank is reduced to a thinner Wall in a piercing mill, the ingot bein then reduced to the desired diameter in a re ucing rolling mill, and then rolled out to the final wall-thickness in a two-high rolling mill.
  • FIG. 1 shows a piercing mill 1, and mandrel 2 in the course of reducing the Wall thick- 'ness of a thickwalled tubular blank 3,
  • FIG. 2 illustrating a reducing rolling mill 4 and the tubular workpiece 5 whose outer dianiieter is reduced to the extent finally desire
  • Fig. 3 shows a two high mill 6 and the workpiece 7 in the course of having its wall thickness further reduced, the workpiece being at the same time stretched to assume its final length Without its outer diameter being changed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Description

June 9,.1931..
w. KUNST I MANUFACTURE OF SEAMLESS TUBES Filed April 4. 1927 Patented- June 9, 1931 UNITED STATES PATENT OFFICE WILHELM KUNS'I, F BARMEN, GERMANY, ASSIGN'OR T0 HEINRICH ESSEROF HILDEN, GERMANY."
SEAMLESS TUBES Application filed April 4, 1927, Serial No. 181,010, and in Germany January 17, 1927.
i My invention relates to the manufacture of seamless tubes by rolling and has for its object to simplify and expedite the production.
It has already been proposed to produce seamless tubes from a tubular blank by roll ing it out upon a roughing and a coggin mill and finishing rolls, a reducing mill eing provided between the cogging and the'finishing trains in which the billet or ingot coming from the cogging mill is reduced in diameter.- In this way a large number of passes can be saved in the finishing rolls.
The present invention differs fundamentally from the foregoing in that the thick walled tubular blank is reduced to a thinner Wall in a piercing mill, the ingot bein then reduced to the desired diameter in a re ucing rolling mill, and then rolled out to the final wall-thickness in a two-high rolling mill.
In the drawings aflixed to this specification and forming part thereof, the invention is illustrated diagrammatically by Way of example. i
In the drawings Fig. 1 shows a piercing mill 1, and mandrel 2 in the course of reducing the Wall thick- 'ness of a thickwalled tubular blank 3,
- Fig. 2 illustrating a reducing rolling mill 4 and the tubular workpiece 5 whose outer dianiieter is reduced to the extent finally desire Fig. 3 shows a two high mill 6 and the workpiece 7 in the course of having its wall thickness further reduced, the workpiece being at the same time stretched to assume its final length Without its outer diameter being changed.
Obviously a blank of predetermined great wall-thickness can thus be converted into a tube of any inferior wall-thickness by adding or removing the respective passes and mandrels. v
In this way not only is the process of production shortened and simplified, but the construction of the whole plant for carrying it out is also simplified. In the place of the roughingjand cogging millsa piercing mill is employed, whereby a whole rolling set is saved. Reheating of the blank before the by rolling, comprising reducing the wall thickness of a comparatively thick-Walled tubular blank, thereafter reducing the diam eter of the said blankto the final diameter 5 and thereafter reducing the wall thickness of saidblank to the final'thickness.
2. The process of producing seamless tubes by rolling, comprising reducing the wall thickness of a comparatively thick-walled 'tubularblank in a piercing mill, thereafter reducing the diameter of the said blank to the final diameter in a reducing mill and thereafter reducing the wall-thickness of said blank to the final thickness in a twohigh rolling mill.
In testimony whereof I afiix my signature.
WILHELM KUNST.
US181010A 1927-01-17 1927-04-04 Manufacture of seamless tubes Expired - Lifetime US1808957A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1808957X 1927-01-17

Publications (1)

Publication Number Publication Date
US1808957A true US1808957A (en) 1931-06-09

Family

ID=7744198

Family Applications (1)

Application Number Title Priority Date Filing Date
US181010A Expired - Lifetime US1808957A (en) 1927-01-17 1927-04-04 Manufacture of seamless tubes

Country Status (1)

Country Link
US (1) US1808957A (en)

Similar Documents

Publication Publication Date Title
US1839919A (en) Seamless hollow metallic section and process of making the same
US1808957A (en) Manufacture of seamless tubes
US1076545A (en) Method of making seamless tubes.
US1523951A (en) Tubular corrugated wall and method for making the same
GB2128121A (en) Producing seamless pipes by rolling
US1913206A (en) Manufacture of tubes
US1957916A (en) Apparatus for and method of producing metal tubes
US1858920A (en) Method of making seamless tubes
US1412196A (en) Manufacture of seamless tures
US1888607A (en) Method of making seamless tubes
US792231A (en) Art of cross-rolling tubular bodies or blanks in a heated state.
US1970570A (en) Method and apparatus for tube manufacture
US1662680A (en) Method of rolling down hollow bodies
US1685402A (en) Manufacture op highest pressure conduits
US1983934A (en) Method and apparatus for making seamless tubes
JPS6035206B2 (en) Seamless steel pipe manufacturing method
US1712972A (en) Method of forming blanks for making seamless tubes
US1971829A (en) Method of making tubes
DE523897C (en) Process for the production of seamless tubes
US4196838A (en) Methods for the manufacture of longitudinal-seam welded tubes
US1515075A (en) Sylvania
US1088650A (en) Process of forming tubes and apparatus therefor.
US1006602A (en) Method of removing surface defects.
SU38516A1 (en) A method of making rolled tubes with internal wall thickenings at the ends
US1898779A (en) Method of rolling tubes with internally thickened ends