US2505718A - Tube forming machine with longitudinally movable core - Google Patents

Tube forming machine with longitudinally movable core Download PDF

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Publication number
US2505718A
US2505718A US757194A US75719447A US2505718A US 2505718 A US2505718 A US 2505718A US 757194 A US757194 A US 757194A US 75719447 A US75719447 A US 75719447A US 2505718 A US2505718 A US 2505718A
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US
United States
Prior art keywords
tube
machine
core
blank
die block
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
US757194A
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English (en)
Inventor
Alois K Nowak
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.)
Clearing Machine Corp
Original Assignee
Clearing Machine 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 Clearing Machine Corp filed Critical Clearing Machine Corp
Priority to US757194A priority Critical patent/US2505718A/en
Priority to DEP29417D priority patent/DE870540C/de
Application granted granted Critical
Publication of US2505718A publication Critical patent/US2505718A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/007—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen using a fluid connection between the drive means and the press ram
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0263—Die with two oscillating halves

Definitions

  • This invention relates in general to tube forming machines wherein a blank sheet of material is formed into tubular shape.
  • An important object of the invention is to provide a new and novel machine wherein a blank sheet of material is formed into a tubular shape having a longitudinal gap, the resulting gap being straight and uniform along its length and in a true axial direction, whereby the gap may be welded easily and quickly by a'welclmg apparatus of conventional design.
  • Another important object is to provide an improved tube forming machine to neutralize the stress of the blank metal sheet by a preforming operation, after which the preformed blank is formed into a tubular shape.
  • a further object of the invention is the provision of a tube forming machine embodying novel characteristics wherein a die is utilized for preforming a blank sheet of material, the preformed blank being subsequently formed into a tube around a core, and then automatically stripped from the core; means also being provided for feeding automatically the next succeeding blank to the die.
  • Fig. 1 is a front elevational view of the machine of the present invention
  • Fig. 2 is a side elevational view of the machine showing that side where the feeding of the blanks takes place;
  • Fig. 3 is a side elevational view of the opposite side of the machine where the stripping of the tube from its core takes place;
  • Fig. 4 i an enlarged vertical transverse sectional view through the machine at substantially the center thereof showing the various parts of the machine in their relative positions when the blank sheet of material is in place;
  • Fig. 5 is a view similar to Fig. 4, but showing the various parts in their relative positions for the preforming step;
  • Fig. '7 is a view similar to Figs. 4, 5 and 6, but showing the various parts of the machine in their relative positions at the end of the tube forming operation.
  • Fig. 8 is an enlarged vertical sectional view taken substantially along the line B8 of Fig. 3,
  • the present invention involves the use of a suitable machine wherein a die block, composed of two pivotally mounted jaws, is adapted to have a tube blank applied thereto.
  • a movable die head is so constructed that a blank will be preformed when the die head is brought into contact with the tube blank whereby a neutralization of the stresse results, the metal tending to flow somewhat during the preforming period on the blank.
  • a core is positioned above the preformed blank, and the jaws of the die block are caused to press the blank around the core to thus complete the tube forming operation.
  • Novel means are provided to strip the tube automatically from its core and deposit another blank on the die block.
  • the preferred form of the machine for carryadapted to be moved into contact with the die block 4 as the head 3 moves downwardly.
  • the entire machine, or press may be operated preferably by suitable hydraulicmeans (not shown) but which is adapted to actuate a piston within a cylinder 3.
  • Any suitable and well known hydraulic system may be utilized for actuating the press, and this system may consist merely of a suitable source of supply of hydraulic fluid which is caused to flow under pressure against the piston in the cylinder 8 to move the head 3 downwardly.
  • the reverse movement of the head 3 also may take place by any suitable means, either by hydraulic pressure in the opposite direction or by pneumatic pull-back means.
  • a control panel 3 may contain suitable control means for controlling the flow of the hydraulic liquid for the actuation of the machine or press.
  • One side of the machine or press is provided with suitable means for supporting a stack of tube blanks. These blanks, if desired, may be fed to the machine by hand, but preferably, they are fed automatically by means presently to'be described.
  • the various elements at the one side of the machine include a frame or rack ill for movably supporting a table II.
  • the table is adapted to be supported by and moved in a vertical plane by the pedestal 12 which may be :Tctuated by either mechanical or hydraulic means.
  • the pedestal l2, for elevating the table ii may be of any suitable construction to cause the table Ii to be elevated automatically a predetermined distance as the tube blanks are fed therefrom so that the uppermost blank is always in a position to be fed into the press by automatic means hereinafter described.
  • the side of the machine opposite from that Just above described and as shown in Figs. 1 and 8, has a shuttle member l4 which carries a core II at the underside thereof and this core is adaptedto be reciprocated longitudinally from the position shown in Fig. 1 to a position immediately below the head of the press.
  • One end of the shuttle I4 may have secured thereto an outwardly and downwardly extending arm i6 which has a shoe, or other suitable means, l1 attached to its outer end.
  • the shoe H is adapted to contact one end of a blank l3, (as shown in Fig. 8 and in the dotted line position thereof in Fig. l), and to move the blank to its position on the die block 4 within the press, as shown in the full line position thereof in Fig. 1.
  • the shuttle l4 normally is mounted and adapted tomove within the die member I, but the shuttle also may have auxiliary supporting means It extending outwardly from the machine, said 4 means.being supported in turn by the supporting links i
  • the formed tube, on the core I3 is carried outwardly to the full line position thereof as shown in Fig. 1 at the completion of the ilnal forming operation.
  • Suitable means are then provided to strip the tube from its core as the shuttle moves back to its operative position within the press, at which time the tube will drop downwardly to a suitable rack 20, whereupon the tube in its final form may be then placed on a suitable conveyor 22 where it will be directed to a continuous seam welding machine for welding the gap therein.
  • the die block 4, Fig. 4 is composed of oppositely disposed jaw members 23 and 24 which are pivotally connected together at their centers by means of an elongated rod or shaft 25. These jaw members may extend substantially the width of the press and are of sufllcient length to support the entire length oi the tube blank l3.
  • the inner sides of the jaws 23 and 24 are provided with elongated inwardly extending arcuate surfaces or recesses 26 and 21, and the tube blank 13, when in place, is adapted to rest at three points along its length.
  • the two jaws are so formed as to support the tube blank l3 at its center, and these laws are preferably provided with elongated recesses 28 and 29 for the purpose of receiving the longitudinal edges of the tube blank.
  • a cushion plunger 3a is mounted for vertical reciprocation within the bed I, the plunger being provided at its upper end with an elongated supporting member 3
  • the insert 32 is provided with a longitudinal concave portion 33 adapted to support the undersides of the jaws 23 and 24 at their longitudinal centers.
  • the undersides of the jaws are also supported along eachside of the center by elongated supporting blocks 34 and 35 which are adapted to be received in'longitudinal arcuate recesses 36 and 31 provided in a suitable portion of the bed I.
  • the upper sides of the supporting blocks 34 and 35 are longitudinally concave as indicated at 33 and 39 for the purpose of providing a sturdy support for the 'under curved sides of the jaws 23 and 24.
  • the movable die member 'i is provided with spaced elongated downwardly extending legs 40 and 4i, each oi. which is arcuately shaped at its lower side as indicated at 42 and 43, respectively.
  • is so shaped as to receive slidably theshuttle I4 which is shown in Fig. 4 in its outer position, and as 11- lustrated in full lines in Fig. l.
  • the first step in the operation of the machine is the preforming of the tube blank, and for this purpose the head 6, carrying the die member i, is moved downwardly to the position shown in- Fig 5.
  • the shuttle i4 and core l5 will not interfere with such movement because these members are not within the press during the preforming operation.
  • of the die member i are adapted to bear against the blank l3 to press the sides thereof into the recesses 26 and 21 of the Jaws 23 and 24.
  • This preforming step neutralizes the stress present in the blank, and causes the material to flow so that the final forming step may take place more readily and allowthe sap to be formed in a true axial direction with the sides thereof in parallel relationship.
  • any suitable means may be provided to assure the re-opening of the jaws, but the preferred form of the device is illustrated herein as including a pneumatic pull-back cylinder 45 at one side of the die block.
  • the cylinder 45 has a piston arranged therein to which a piston rod 46- is connected.
  • a link 41 connects the outer end of the piston rod 46 to a bracket 48 which is secured to the jaw 23.
  • This pneumatic pull-back arrangement normally will urge the jaws to an outward position; and as the head is elevated after the final forming of the tube, thus permitting the cushion plunger 30 and pivot shaft 25 to also move upwardly, the pneumatic pull-back will act to assure that the two laws will return to their normal open positions, as shown in Fig. 4, for the reception of a next succeeding blank.
  • the shuttle I4 is then moved out of the press to its full line position shown in Fig. 1; and as this movement of the shuttle occurs, the feeding means It and I! will automatically feed the next succeeding blank into the die block in the manner described hereinbefore.
  • Movable end brackets 49 and 50 are provided, and these brackets may be opened, as shown in Fig. '7, and closed at suitable fimes during operation of the machine for stripping the tube from its core.
  • the brackets 49 and 50 are then moved to closed position where the inner ends thereof bear against the innermost end of the tube 2
  • the shuttle remainsin this position during the preforming operations, Figs. 4 and 5, after which time the shuttle is brought back within the press to the position shown in Fig. 6.
  • the brackets 49 and 50 while permitting movement of the core, will restrain the tube II, and thus, strip the tube from the core, whereupon the tube will drop into the rack 20.
  • the tube may then be removed from the rack and placed on the conveyor 22 where it will be carried to a continuous seam welding machine for welding the gap to complete the final tube.
  • the tube formed in the manner just described, will be free from flat spots, and the gap will be uniform and will extend in a true axial direction.
  • the numerous disadvantages inherent in usual and conventional tube forming machines are thereby overcome.
  • the preforming operation on the tube blank in a sense, conditions the matetube.
  • a tube forming machine comprising a die block adapted to support a tube blank, an elongated core member movable into and out of the machine, means for pressing the tube blank around said core while in the machine to form the tube, means for stripping the formed tube from said core, and means operable by movement. of said core member out of the machine to feed the next succeeding blank to said die member.
  • a tube forming machine comprising a die block adapted to support a tube blank, means for preforming the tube blank into a predetermined contour, an elongated longitudinally movable core, meansfor pressing the preformed tube blank around said core to form the tube, means for stripping the tube from said core, and means operable upon movement of said core in one direction to feed the next succeeding blank to said die member.
  • a tube forming machine comprising a die block adapted to support a tube blank, an elongated core mounted for longitudinal movement into and out of the machine adjacent said die block, and means for pressing said blank around said core while in the machine to thereby form the tube, said core being movable with the tube thereon out of the machine, whereby the tube may be stripped therefrom.
  • a die block including a pair of pivotally mounted jaws each having an elongated recess therein, a complementary die member including a pair of spaced legs adapted to be received by said recesses, means on said die block to support a tube blank, means to cause a relative movement between said die block and complementary die member toward each other under pressure to thereby preform the tube blank by pressing the sides thereof into the jaw recesses, a core mounted for reciprocation on said die member between the legs thereof and for movement into and out of REFERENCES CITED

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US757194A 1947-06-26 1947-06-26 Tube forming machine with longitudinally movable core Expired - Lifetime US2505718A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US757194A US2505718A (en) 1947-06-26 1947-06-26 Tube forming machine with longitudinally movable core
DEP29417D DE870540C (de) 1947-06-26 1949-01-01 Maschine zum Formen von spaeter laengs zu schweissenden Rohren

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US757194A US2505718A (en) 1947-06-26 1947-06-26 Tube forming machine with longitudinally movable core

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US2505718A true US2505718A (en) 1950-04-25

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DE (1) DE870540C (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591085A (en) * 1949-06-06 1952-04-01 Basalt Rock Company Inc Machine for bending sheets
US2889866A (en) * 1954-06-11 1959-06-09 W B W Tool Company Apparatus for forming tubular sleeves
US2891596A (en) * 1953-07-08 1959-06-23 Babcock & Wilcox Co Manipulating mechanism for heavy duty metal working presses
US2935111A (en) * 1955-07-11 1960-05-03 Western Electric Co Apparatus for bending parts into c-shape
DE1162317B (de) * 1958-08-30 1964-02-06 Basf Ag Vorrichtung zur Herstellung von Hohlkoerpern mit aus der inneren Mantelflaeche herausragenden Vorspruengen
US3793971A (en) * 1972-04-13 1974-02-26 Mac Fab Products Method of making collar
NL1014810C2 (nl) * 2000-03-31 2001-10-19 Adriaan Teunissen Vervormingsinrichting voor het vervormen van een plaatelement.
JP6487612B1 (ja) * 2018-03-19 2019-03-20 有限会社ティワイアソシエイツ 曲げ加工装置
US11207722B2 (en) * 2018-09-10 2021-12-28 Amsted Rail Company, Inc. Systems and methods for manufacturing a ring from a metal sheet

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001041949A2 (en) * 1999-12-10 2001-06-14 R.J. Tower Corporation Blank shaping tool
DE10144465A1 (de) 2001-09-10 2003-04-10 Burger Ag Automation Technolog Vorrichtung zum Verformen von dünnwandigem Material

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190328387A (en) * 1903-12-24 1904-09-22 Frederick Charles Guy Improvements in Machinery for Bending Metallic Sockets for Connecting Gas, Water and other Pipes.
US1045089A (en) * 1912-06-08 1912-11-19 Canton Art Metal Company Ridge-roll-forming die.
US1258892A (en) * 1916-07-05 1918-03-12 Andrew A Kramer Metal-bending machine.
GB115961A (en) * 1917-07-21 1918-05-30 James Potter A Device for Covering and Securing the "Tits" or Plugs of Barrels, Casks and the like, and Means for Fixing the same.
US1497006A (en) * 1924-06-10 aikens
US1607073A (en) * 1923-02-12 1926-11-16 Western Electric Co Machine and method of supplying work thereto
US1633744A (en) * 1926-01-29 1927-06-28 Hughes George Apparatus for flanging and bending metal plates
US1698904A (en) * 1929-01-15 Johbt f
US1849054A (en) * 1929-10-11 1932-03-15 Pont A Mousson Fond Apparatus for the manufacture of metal tubes
US1852101A (en) * 1929-01-07 1932-04-05 Wickes Boiler Co Cylinder-forming machine
US1879078A (en) * 1930-04-04 1932-09-27 Carlsen Carl Method of and means for forming tubular articles
US1888380A (en) * 1929-08-30 1932-11-22 Jones & Laughlin Steel Corp Skelp forming machine
US1912000A (en) * 1929-12-02 1933-05-30 Pierce Arrow Motor Car Company Method of forming head lamp housings

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1698904A (en) * 1929-01-15 Johbt f
US1497006A (en) * 1924-06-10 aikens
GB190328387A (en) * 1903-12-24 1904-09-22 Frederick Charles Guy Improvements in Machinery for Bending Metallic Sockets for Connecting Gas, Water and other Pipes.
US1045089A (en) * 1912-06-08 1912-11-19 Canton Art Metal Company Ridge-roll-forming die.
US1258892A (en) * 1916-07-05 1918-03-12 Andrew A Kramer Metal-bending machine.
GB115961A (en) * 1917-07-21 1918-05-30 James Potter A Device for Covering and Securing the "Tits" or Plugs of Barrels, Casks and the like, and Means for Fixing the same.
US1607073A (en) * 1923-02-12 1926-11-16 Western Electric Co Machine and method of supplying work thereto
US1633744A (en) * 1926-01-29 1927-06-28 Hughes George Apparatus for flanging and bending metal plates
US1852101A (en) * 1929-01-07 1932-04-05 Wickes Boiler Co Cylinder-forming machine
US1888380A (en) * 1929-08-30 1932-11-22 Jones & Laughlin Steel Corp Skelp forming machine
US1849054A (en) * 1929-10-11 1932-03-15 Pont A Mousson Fond Apparatus for the manufacture of metal tubes
US1912000A (en) * 1929-12-02 1933-05-30 Pierce Arrow Motor Car Company Method of forming head lamp housings
US1879078A (en) * 1930-04-04 1932-09-27 Carlsen Carl Method of and means for forming tubular articles

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591085A (en) * 1949-06-06 1952-04-01 Basalt Rock Company Inc Machine for bending sheets
US2891596A (en) * 1953-07-08 1959-06-23 Babcock & Wilcox Co Manipulating mechanism for heavy duty metal working presses
US2889866A (en) * 1954-06-11 1959-06-09 W B W Tool Company Apparatus for forming tubular sleeves
US2935111A (en) * 1955-07-11 1960-05-03 Western Electric Co Apparatus for bending parts into c-shape
DE1162317B (de) * 1958-08-30 1964-02-06 Basf Ag Vorrichtung zur Herstellung von Hohlkoerpern mit aus der inneren Mantelflaeche herausragenden Vorspruengen
US3793971A (en) * 1972-04-13 1974-02-26 Mac Fab Products Method of making collar
NL1014810C2 (nl) * 2000-03-31 2001-10-19 Adriaan Teunissen Vervormingsinrichting voor het vervormen van een plaatelement.
JP6487612B1 (ja) * 2018-03-19 2019-03-20 有限会社ティワイアソシエイツ 曲げ加工装置
US11207722B2 (en) * 2018-09-10 2021-12-28 Amsted Rail Company, Inc. Systems and methods for manufacturing a ring from a metal sheet

Also Published As

Publication number Publication date
DE870540C (de) 1953-03-16

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