US1432803A - Process of making tubes - Google Patents

Process of making tubes Download PDF

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Publication number
US1432803A
US1432803A US440502A US44050221A US1432803A US 1432803 A US1432803 A US 1432803A US 440502 A US440502 A US 440502A US 44050221 A US44050221 A US 44050221A US 1432803 A US1432803 A US 1432803A
Authority
US
United States
Prior art keywords
tubes
billet
copper
tube
billets
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
US440502A
Inventor
David L Summey
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.)
Scovill Inc
Original Assignee
Scovill Inc
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 Scovill Inc filed Critical Scovill Inc
Priority to US440502A priority Critical patent/US1432803A/en
Application granted granted Critical
Publication of US1432803A publication Critical patent/US1432803A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/047—Extruding with other step
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S72/00—Metal deforming
    • Y10S72/70—Deforming specified alloys or uncommon metal or bimetallic work

Definitions

  • This invention relates to the production of brass tubes.
  • This cast billet is then heated and while hot is rolled into a tube on the ordinary Mannesmann machine.
  • a cast billet however has the usual casting defects, such as bubbles, blow holes, spills, etc., and these defects will be present in the finished tube, sometimes in an exaggerated form.
  • brass tubes produced by this process are relatively low in copper. Practically speaking, in commercial operations, brass tubes containing above 62% per cent of copper cannot be produced by this rocess. Brass tubes, however, having a high copper content are desirable because of the increased advantages in working.
  • Brass tubes are also commercially produced by the so-called cold process. According to the ordinary practice a tube is cast around a core and is then cold treated to produce the finished tube. By this cold process, tubes having a percentage of copper up to 67% or higher, are produced.
  • Such tubes have the casting defects referred to in connection with the hot process. It is possible to remove such castmg defects from the outer surface of the tube, to a certain extent, by scalplng. It 1s, however, a diflicult and expensive operat on to remove such defects from the interior surface of the tube. Furthermore, the production of tubes by the cold process is expensive.
  • the in- I vention consists in the process of making brass tubes as herein described and more particularly pointed out in the appended claims.
  • this billet containing above 62%% copper. It is important that this wrought billet should be substantially free from lead.
  • the composition of this wrought billet ma advantageously consist substantially of lea free spelter, that is to say, the lead content of the spelter shall be such that the heat will contain less than .02% of lead.
  • the copper content of the billet may be as high as 68%.
  • the wrought billet is heated in any suitable manner, and, while hot, is subjected to the action of tube forming rolls and a core. This'last mentioned step may be conveniently carried on in the so-called Mannesmann machine.
  • the billet is formed by extrusion.
  • a mass of cast metal' is placed in an extrusion press and extruded into a rod of proper diameter. This rod is then cut into billets of convenient lengths, the billets heated and formed into tubes as above described.
  • Brass tubes produced according to the present invention possess the advantageous features of both the old hot and cold processes, in addition to the new advantages attained. They have the benefit of the hi h copper content of tubes made by the co d process and can be much more economically made. Casting defects are eliminated and the finished tube is smooth and free from defects both inside and out.
  • the process of producing brass tubes 1 4.
  • the process of producing brass tubes consisting in extruding into a rod a mass of metal containing above 62-1-% copper, the 10 balance of the mass being substantially leadfree spelter, cutting the rod into billets, heating-the billets, and subjecting the billets, while hot, to the action of tubeforming rolls and a core;

Description

Patented (Oct. 24, i922.
UNITED STATES PATENT-@FFHCE.
DAVID L. SUMMEY, OF WATERBURY, CONNECTICUT, ASSIGNOR TO SCOVILL MANUFAC- TUBING COMPANY, A CORPORATION OF CONNECTICUT.
PROCESS OF MAKING TUBES.
No Drawing.
"To all whom it may concern:
Be it known that I, DAVID L. SUMMEY, a citizen of the United States, residing at Waterbury, county of New Haven, and
State of Connecticut, have invented certain new and useful Improvements in Processes of Making Tubes, fully described and represented in the following specification.
This invention relates to the production of brass tubes.
In the commercial production of brass tubes by the so-called hot processes, according to the ordinary practice, a billet is cast to about thesize of the desired. tube.
This cast billet is then heated and while hot is rolled into a tube on the ordinary Mannesmann machine. A cast billet, however has the usual casting defects, such as bubbles, blow holes, spills, etc., and these defects will be present in the finished tube, sometimes in an exaggerated form. Further, brass tubes produced by this process are relatively low in copper. Practically speaking, in commercial operations, brass tubes containing above 62% per cent of copper cannot be produced by this rocess. Brass tubes, however, having a high copper content are desirable because of the increased advantages in working.
Brass tubes are also commercially produced by the so-called cold process. According to the ordinary practice a tube is cast around a core and is then cold treated to produce the finished tube. By this cold process, tubes having a percentage of copper up to 67% or higher, are produced.
Such tubes, however, have the casting defects referred to in connection with the hot process. It is possible to remove such castmg defects from the outer surface of the tube, to a certain extent, by scalplng. It 1s, however, a diflicult and expensive operat on to remove such defects from the interior surface of the tube. Furthermore, the production of tubes by the cold process is expensive.
It is the principal object of the present invention to provide for the production, by the hot process, of brass tubes containing a high percentage of copper,
Application 'filed January 27, 1921. Serial No. 440,502.
With this general object in view, the in- I vention consists in the process of making brass tubes as herein described and more particularly pointed out in the appended claims.
In carrying out-the invention, a wrought billet is employed, this billet containing above 62%% copper. It is important that this wrought billet should be substantially free from lead. In addition to the copper the composition of this wrought billet ma advantageously consist substantially of lea free spelter, that is to say, the lead content of the spelter shall be such that the heat will contain less than .02% of lead. The copper content of the billet may be as high as 68%. i
The wrought billet is heated in any suitable manner, and, while hot, is subjected to the action of tube forming rolls and a core. This'last mentioned step may be conveniently carried on in the so-called Mannesmann machine.
While the wrought billet may be produced in any suitable manner, in carrying'out the invention by what is regarded as the best method, the billet is formed by extrusion. For example, a mass of cast metal'is placed in an extrusion press and extruded into a rod of proper diameter. This rod is then cut into billets of convenient lengths, the billets heated and formed into tubes as above described.
Brass tubes produced according to the present invention possess the advantageous features of both the old hot and cold processes, in addition to the new advantages attained. They have the benefit of the hi h copper content of tubes made by the co d process and can be much more economically made. Casting defects are eliminated and the finished tube is smooth and free from defects both inside and out.
What is claimed is:
1. The process of producing brass tubes which consists in forming wrought billets containing above 6%% copper and manipulating the wrought billets to form them into tubes.
2, The process of producing brass tubes 1 4. The process of producing brass tubes consisting in extruding into a rod a mass of metal containing above 62-1-% copper, the 10 balance of the mass being substantially leadfree spelter, cutting the rod into billets, heating-the billets, and subjecting the billets, while hot, to the action of tubeforming rolls and a core;
In testimony whereof, I have hereunto set my hand.
DAVID L. SUMMEY.
US440502A 1921-01-27 1921-01-27 Process of making tubes Expired - Lifetime US1432803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US440502A US1432803A (en) 1921-01-27 1921-01-27 Process of making tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US440502A US1432803A (en) 1921-01-27 1921-01-27 Process of making tubes

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US1432803A true US1432803A (en) 1922-10-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736957A (en) * 1951-03-08 1956-03-06 Siemens Ag Manufacture of copper wire for varnish-insulated wires
US2761204A (en) * 1951-02-12 1956-09-04 United States Steel Corp Method of making bars

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761204A (en) * 1951-02-12 1956-09-04 United States Steel Corp Method of making bars
US2736957A (en) * 1951-03-08 1956-03-06 Siemens Ag Manufacture of copper wire for varnish-insulated wires

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