US3764122A - Apparatus for selectively scarfing metal bodies - Google Patents

Apparatus for selectively scarfing metal bodies Download PDF

Info

Publication number
US3764122A
US3764122A US00118048A US3764122DA US3764122A US 3764122 A US3764122 A US 3764122A US 00118048 A US00118048 A US 00118048A US 3764122D A US3764122D A US 3764122DA US 3764122 A US3764122 A US 3764122A
Authority
US
United States
Prior art keywords
nozzle
scarfing
oxygen
width
web
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
US00118048A
Other languages
English (en)
Inventor
T Lytle
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.)
L-Tec Co
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Application granted granted Critical
Publication of US3764122A publication Critical patent/US3764122A/en
Assigned to L-TEC COMPANY reassignment L-TEC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNION CARBIDE CORPORATION
Assigned to SECURITY PACIFIC BUSINESS CREDIT INC., A DE CORP. reassignment SECURITY PACIFIC BUSINESS CREDIT INC., A DE CORP. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: L-TEC COMPANY A NY LIMITED PARTNERSHIP
Assigned to L-TEC COMPANY reassignment L-TEC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNION CARBIDE CORPORATION, A CORP OF NY.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames
    • B23K7/06—Machines, apparatus, or equipment specially designed for scarfing or desurfacing

Definitions

  • ABSTRACT 52 US. Cl. 266/23 11, 239/505 A Conventional Continuous Oxygen nozzle Scarfing 51 Int. Cl n23! 7/116 unit can be adapted for Selectively Scarfing the flanges
  • Field of Search 266/23 D, 23 E, 23 11, of beam blanks Without Scarfing the Web by inserting 11 266/23 RH 23 K, 23 L, 23 M, p 23 removable flow restricting plug into the oxygen nozzle 14 /95; 239/103 433 55 505 506 507 slot.
  • the plug may vary in size and may be shaped to direct the flow of the oxygen.
  • references Cited may be used in conjunction with the plug to prevent UNITED STATES PATENTS molten metal from flowing over onto the 'web.
  • the Y 3 modified scarfing unit may be used in conventional four-sided self-sizing scarfing machines. 2:638:59 5 1953 Winkelman 266/23 P x 3 2 Claims, 5 Drawing Figures I6 3? 3? f w r w k I PATENTED [1m 9 I 75 FIG. 3.
  • Structural steel shapes such as l beams, channels and the like are commonly rolled from rectangular ingots by forming blanks, such as beam blanks, having a crosssectional outline similar to the shape of the finished structural member.
  • the ingots are rolled into beam blanks which are then rolled further into the desired structural shape by being subjected to a series of successive changes in shape and reduction in thickness.
  • Beam blanks are therefore an intermediate stage in the overall rolling operation of the finished product.
  • Beam blank scarfing has heretofore been carried out primarily on special type of apparatus, that is special purpose machines which are solely able to accomodate -a particular size and shape of product.
  • 3,398,943 illustrates a scarfing machine in which the scarfing heads are contoured to correspond to the particular shape of the metal workpiece to be scarfed.
  • the scarfing of beam blanks with a four-sided scarfing represents a wasteful operation, rendering the entire scarfing operation inefficient. This is particularly true for beam blanks where the web surface represents the major portion of the metal work surface.
  • a scarfing unit capable of selectively scarfing a metal work surface while preventing molten metal from running over into the un- SUMMARY OF INVENTION
  • flow restricting means is not intended to be limited to completely restricting the flow of oxygen but may be used only to direct the flow.
  • the restricting means may entirely plug up the orifices at the back end of the slotted nozzle so that complete restriction is obtained.
  • the flow restricting means may have edges parallel to the edges of the scarfing unit thereby directing the flow of oxygen in-a straight path, or may be angularly shaped thereby creating a change in the direction of the oxygen flow through the nozzle such that the oxygen stream passing through the nozzles strikes the section of the workpiece to be scarfed with a force and direction so as to prevent molten metal from running over into the portion of the workpiece which is not to skilled in the art that each side may be made up of sev-' eral scarfing units butted up against each other in accordance with conventional practice.
  • FIG. 1 depicts a beam .blank upon which the preferred pattern of metal removal is indicated by the dotted lines.
  • FIG. 2 is a schematic in partially foreshortened sectional representation of a scarfing unit in combination with a four-sided scarfing machine in accordance with a preferred embodiment of the present invention.
  • FIG. 3 is an illustration of two angularly shaped flow restricting members according to the present invention.
  • FIG. 4 is a schematic view of a beam blank upon which the flow profiles of the scarfing oxygen streams are indicated relative to pressurized air streams used in accordance with the present invention.
  • FIG. 5 is a diagramatic elevation in partial crosssection of a scarfing unit provided with flow restricting means in the oxygen nozzle in accordance with the Referring to FIG. 1, the preferred pattern of beam blank scarfing in accordance with the present invention is shown by dotted line 1 indicating that metal removal is only effected along the surface of the beam blank flanges 2 and 3, leaving the upper 'and lower surfaces 4 and 5 respectively of web 6 untreated.
  • FIG. 2 shows scarfing unit 10 used as the upper scarfing unit in combination with a four-sided scarfing machine not shown in its entirety) including lower scarfing unit 11, first side unit 12 and second side unit 13, all schematically represented.
  • Scarfing oxygen indicated by arrow 14 is fed through oxygen supply manifold 15 and passes therefrom through a multiplicity of orifices 16 into the back end of continuous slot nozzle 17.
  • the oxygen passes through nozzle 17 in the direction shown by arrows l8 and 19 and out through the front end 20 of nozzle 17 being thereby directed at the flanges 21 and 22 at the workpiece W, which in the present case is shown as an I beam.
  • Flow restricting members 23 and 24 are contiguous with the upper and lower surfaces of the preheat blocks (not visible in this view) and extend forwardly from the back end of slotted nozzle 17 being in contact so as to shut off certain of the orifices 16 and extending to the front end 25 of oxygen slot 17, thereby completely filling a section of said nozzle 17.
  • Flow restricting members 23 and 24 are positioned within nozzle 17 so as to prevent oxygen gas from impinging upon the web surface 26 of the workpiece W, thereby preventing scarfing oxygen reaction from taking place thereon.
  • the beam blank 20 is thus selectively scarfed only along the flange surfaces 21 and 22.
  • Size adjusting piston 27 is positioned within the oxygen supply manifold 15 in accordance with the size of the particular metal body to be scarfed in accordance with the conventional manner. It serves to prevent the oxygen gas 14 from filling the oxygen manifold 15 beyond the limits of the O-ring 28 and thus illustrates the number of orifices 16 which are operative during the scarfing reaction. In the embodiment shown orifices to the right of orifice 30 would be inoperative and oxygen would be supplied only to those orifices to the left of said orifice 30.
  • Flow restricting members 23 and 24 are removably inserted within oxygen slot nozzle 17 by means of a screw 31 which forces anvil 32 to press against compressible pad 33 which may be made for example of Teflon, causing it to. expand in a direction normal to screw 31 thereby locking it in place against a surface to the preheat block (not shown in FIG. 2 since such planes are parallel to the plane of the drawing).
  • flow restricting members 40 and 41 illustrate the angular shapes which the size of such members can assume in applications where it is desirable to create a change in the scarfing oxygen stream which passes through nozzles 17.
  • Members 40 and 41 are removably inserted into the oxygen slot nozzle 17 in like manner as previously described by means of screws 42, anvils 43 and compression pads 44.
  • air jets 50 are shown as they would be used in combination with the present invention.
  • Pressurized air streams 51 shown above and below the web 52 are directed at said web and are deflected therefrom along flanges 53 to prevent molten metal from the scarfed flanges 53 from running over on to the surface of web 52.
  • the angle of deflection of air stream 51 will be governed by its angle of impingement upon web 52, the particular shape of the work surface which it strikes and the motion of the work surface relative to the air stream.
  • the flow of oxygen stream 54 is also shown impinging upon flanges 53. It should be noted that angle A, the angle of impingement between air stream 51 and the surface of web 52 should always be somewhat less than angle B, the angle of impingement between oxygen stream 54 and flange edge 53.
  • FIG. 5 illustrates the relative orientation of the flow restricting member which fills the oxygen nozzle 61 formed between the lower surface 62 of upper preheat block 63 and the upper surface 64 of lower preheat block 65.
  • the flow restricting members 23 and 24 not be flush or contiguous with the upper and lower surfaces defining the nozzle slot 17, but rather that they be substantially contiguous, that is leaving a clearance therebetween for the flow of a small amount of oxygen.
  • FIG. 2 wherein recesses 38 and 39 are provided between the upper surfaces of flow restricting members 23 and 24, respectively and the lower surface of the upper preheat block to enable a small flow of oxygen gas eminating from theorifices in back of members 23 and 24 to pass through said recesses.
  • the purpose of this small oxygen flow is to keep the exposed front end surface of the upper block clear of slag flow-back which would otherwise accumulate during the scarfing operation.
  • a scarfing unit comprising flat upper and lower surfaces defining therebetween a wide continuous slot nozzle adapted to discharge a sheet-like stream of oxygen gas through the front end of said nozzle at a zone extending across the metal body to be scarfed, said scarfing unit containing a multiplicity of orifices through which oxygen gas is directed into the back end of said nozzle, the improvement comprising means for rendering the scarfing unit capable of selectively scarfing a preselected portion of said metal body narrower than the width of said nozzle while leaving the remaining portion of said metal body unscarfed, comprising: means for restricting the flow of said oxygen gas through a section of said nozzle, said flow restricting means being disposed within said nozzle in such manner as to be substantially contiguous with the upper and lower surfaces of said nozzle and being narrower in width than the width of said nozzle, and said means having sides angularly shaped so as to create a change in the direction of a portion of the oxygen stream pass ing through the oxygen slot such that the oxygen stream impinging upon the
  • a scarfing unit comprising flat upper and lower surfaces defining therebetween a wide continuous slot nozzle adapted to discharge a sheet-like stream of oxygen gas through the front end of said nozzle at a zone extending across the metal body to be scarfed, said scarfing unit containing a multiplicity of orifices through which oxygen gas is directed into the back end of said nozzle, the improvement comprising means for rendering the scarfing unit capable of selectively scarf ing the flange surface of a beam blank while leaving the web surface unscarfed, comprising: means for restricting the flow of said oxygen gas through a section of said nozzle corresponding to the web surface of the beam blank to be scarfed,-said flow restricting means being disposed within said nozzle in such manner as to be substantially contiguous with the upper and lower surfaces of said nozzle, and nozzle means for directing a pressurized air stream at the web, such that said air stream is deflected therefrom upward along the flange to prevent molten metal from the scarfed flange from running over on

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gas Burners (AREA)
US00118048A 1971-02-23 1971-02-23 Apparatus for selectively scarfing metal bodies Expired - Lifetime US3764122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11804871A 1971-02-23 1971-02-23

Publications (1)

Publication Number Publication Date
US3764122A true US3764122A (en) 1973-10-09

Family

ID=22376223

Family Applications (1)

Application Number Title Priority Date Filing Date
US00118048A Expired - Lifetime US3764122A (en) 1971-02-23 1971-02-23 Apparatus for selectively scarfing metal bodies

Country Status (11)

Country Link
US (1) US3764122A (fr)
JP (1) JPS5312900B1 (fr)
AT (1) AT317638B (fr)
AU (1) AU452225B2 (fr)
BE (1) BE779671A (fr)
CA (1) CA935757A (fr)
FR (1) FR2126300B1 (fr)
GB (1) GB1373038A (fr)
IT (1) IT948704B (fr)
LU (1) LU64823A1 (fr)
ZA (1) ZA721174B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013486A (en) * 1975-08-26 1977-03-22 Union Carbide Corporation Spot scarfing nozzle for use in gang arrangement
US4040871A (en) * 1975-08-26 1977-08-09 Union Carbide Corporation Method for producing an individual fin-free spot scarfing cut
US4078950A (en) * 1976-08-26 1978-03-14 Union Carbide Corporation Spot scarfing nozzle for use in gang arrangement
WO1996023617A1 (fr) * 1995-02-01 1996-08-08 The Esab Group, Inc. Collecteur de distribution de gaz pour appareil de decapage de metaux au chalumeau

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2295523A (en) * 1939-05-03 1942-09-08 Linde Air Prod Co Apparatus for conditioning the surfaces of metal bodies
US2638159A (en) * 1948-11-26 1953-05-12 Nat Cylinder Gas Co Post-mix, multiple outlet gas burner
US2838431A (en) * 1953-05-26 1958-06-10 Union Carbide Corp Method and apparatus for thermochemical metal scarfing
US3061297A (en) * 1959-06-18 1962-10-30 Sharon Steel Corp Scarfing nozzle cover
US3455747A (en) * 1966-09-14 1969-07-15 Union Carbide Corp Thermochemical scarfing method and apparatus
US3477646A (en) * 1967-01-06 1969-11-11 Union Carbide Corp Scarfing unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2295523A (en) * 1939-05-03 1942-09-08 Linde Air Prod Co Apparatus for conditioning the surfaces of metal bodies
US2638159A (en) * 1948-11-26 1953-05-12 Nat Cylinder Gas Co Post-mix, multiple outlet gas burner
US2838431A (en) * 1953-05-26 1958-06-10 Union Carbide Corp Method and apparatus for thermochemical metal scarfing
US3061297A (en) * 1959-06-18 1962-10-30 Sharon Steel Corp Scarfing nozzle cover
US3455747A (en) * 1966-09-14 1969-07-15 Union Carbide Corp Thermochemical scarfing method and apparatus
US3477646A (en) * 1967-01-06 1969-11-11 Union Carbide Corp Scarfing unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013486A (en) * 1975-08-26 1977-03-22 Union Carbide Corporation Spot scarfing nozzle for use in gang arrangement
US4040871A (en) * 1975-08-26 1977-08-09 Union Carbide Corporation Method for producing an individual fin-free spot scarfing cut
US4078950A (en) * 1976-08-26 1978-03-14 Union Carbide Corporation Spot scarfing nozzle for use in gang arrangement
WO1996023617A1 (fr) * 1995-02-01 1996-08-08 The Esab Group, Inc. Collecteur de distribution de gaz pour appareil de decapage de metaux au chalumeau

Also Published As

Publication number Publication date
IT948704B (it) 1973-06-11
AU452225B2 (en) 1974-08-13
FR2126300B1 (fr) 1975-10-24
FR2126300A1 (fr) 1972-10-06
CA935757A (en) 1973-10-23
BE779671A (fr) 1972-08-22
GB1373038A (en) 1974-11-06
LU64823A1 (fr) 1972-12-05
AT317638B (de) 1974-09-10
ZA721174B (en) 1972-11-29
JPS5312900B1 (fr) 1978-05-06
DE2208312A1 (de) 1972-09-07
DE2208312B2 (de) 1975-09-11
AU3921772A (en) 1973-08-23

Similar Documents

Publication Publication Date Title
EP0645214B1 (fr) Procede et systeme de rectifiage de billettes
US5493097A (en) Method of forming a plate body
US3764122A (en) Apparatus for selectively scarfing metal bodies
US2871529A (en) Apparatus for casting of metal
AU602730B2 (en) Improved scarfing nozzle
US4651550A (en) Method of decreasing width of thin slab and apparatus therefor
US3033133A (en) Powder washing apparatus
US3950189A (en) Method for cutting out a work piece by a plasma jet or similar cutting arrangement
US3885741A (en) Apparatus for cooling metal webs
US3611841A (en) Method of producing a coating doctor
US2290290A (en) Process and apparatus for desurfacing metal bodies
CA1112996A (fr) Dispositif de sectionnement d'une piece venue de coulee continue
KR0166202B1 (ko) 각부재의 모서리 성형방법 및 그 장치
US2409654A (en) Billet scarfing method and apparatus
US2735796A (en) Process for thermochemically washing
US3339394A (en) Means for laterally limiting the roll gap of a rolling mill for the production of sheets or the like from metal particles
US3437129A (en) Apparatus for continuously casting elongated metal bodies
JPS60115302A (ja) 薄厚スラブ縮幅装置
KR100444615B1 (ko) 보강재 모서리 가공장비
JPH06218550A (ja) 形鋼プラズマ切断法
JPS58199616A (ja) エツジヤ
JPH01237006A (ja) スラブの幅圧下装置及び該装置による幅圧下方法
RU2188128C2 (ru) Устройство для изготовления профилированных резиновых заготовок
WO1994026443A1 (fr) Coulee continue a deux cylindres
JPS5858904A (ja) パタ−ンレス圧延法

Legal Events

Date Code Title Description
AS Assignment

Owner name: L-TEC COMPANY, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNION CARBIDE CORPORATION;REEL/FRAME:004436/0460

Effective date: 19850712

Owner name: L-TEC COMPANY, 666 THIRD AVENUE, NEW YORK, NY 100

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNION CARBIDE CORPORATION;REEL/FRAME:004436/0460

Effective date: 19850712

AS Assignment

Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., A DE CORP.

Free format text: SECURITY INTEREST;ASSIGNOR:L-TEC COMPANY A NY LIMITED PARTNERSHIP;REEL/FRAME:004445/0860

Effective date: 19850716

AS Assignment

Owner name: L-TEC COMPANY, SOUTH CAROLINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNION CARBIDE CORPORATION, A CORP OF NY.;REEL/FRAME:004610/0384

Effective date: 19860828

Owner name: L-TEC COMPANY, EBENEEZER ROAD, POST OFFICE BOX F-6

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNION CARBIDE CORPORATION, A CORP OF NY.;REEL/FRAME:004610/0384

Effective date: 19860828