US3587287A - Automatic machine for preparing the ends of metal pipes for the drawing operation - Google Patents

Automatic machine for preparing the ends of metal pipes for the drawing operation Download PDF

Info

Publication number
US3587287A
US3587287A US774144A US3587287DA US3587287A US 3587287 A US3587287 A US 3587287A US 774144 A US774144 A US 774144A US 3587287D A US3587287D A US 3587287DA US 3587287 A US3587287 A US 3587287A
Authority
US
United States
Prior art keywords
tube
machine
pipe
mandrel
extremity
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
US774144A
Other languages
English (en)
Inventor
Michelangelo Vacca
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.)
SOC METALLURGICA ITALIANA
Original Assignee
SOC METALLURGICA ITALIANA
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 SOC METALLURGICA ITALIANA filed Critical SOC METALLURGICA ITALIANA
Application granted granted Critical
Publication of US3587287A publication Critical patent/US3587287A/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
    • 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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • 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
    • B21C5/00—Pointing; Push-pointing
    • 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
    • B21C5/00—Pointing; Push-pointing
    • B21C5/003—Pointing; Push-pointing of hollow material, e.g. tube
    • 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
    • B21C9/00—Cooling, heating or lubricating drawing material

Definitions

  • the machine introduces lubricating oil and a drawing mandrel to the inside of the pipe, produces one or more dents on said pipe, to stop and position the said mandrel and forms the extremity of the pipe to the desired shape and dimensions required by the pipe-drawing machine.
  • This invention relates to a machine which automatically performs the various operations required for preparing the extremities of metal pipes to be drawn and in particular automatically introduces the lubricating oil and a drawing mandrel to the inside of the pipe, produces one or more dents on said pipe to stop and position the drawing mandrel, and finally forms, at the extremity of the pipe being processed, the desired shaped and-dimensions for the pipe to be further processed in the pipe-drawing machine.
  • the extremities of metal tubes to be drawn must be suitably prepared before being passed to the drawbenches (in the case of straight tubes) or to the drum blocks (in the case of tubes wound in rolls), so as to permit easy introduction in the die and easy grasping by the traction devices of the drawing machines.
  • the drawing of tubes wound in rolls use is normally made of floating, olive-shaped mandrels (exceptionally in the drawing of straight tubes also) which must be introduced in the inside of the tubes.
  • the mandrels must be arrested and positioned therein by means of one or more dents obtained by plastic deformation of the pipe or tube.
  • an automatic machine which prepares the extremity of metallic tubes for the drawing operation so as to eliminate the disadvantages mentioned above.
  • the automatic machine of this invention consists of:
  • a cylindrical thrust bar coaxial with the extremity of the tube and actuated by a hydraulic cylinder, which bar can be displaced axially relative to the tube to release the lowermost olive-shaped mandrel from the loader and subsequently push it into the tube, said bar being provided with a central bore through which the lubricant is fed into said tube with the aid of feeding means, before the introduction of the mandrel.
  • said machine includes a movable section, comprising:
  • the movable section thereof In operation of the machine the movable section thereof is moved downwardly by means of a hydraulic cylinder after the upper die has been brought against the extremity of the tube, and after said two side punches of the stationary section have laterally deformed said extremity, so as to impart to the latter a cylindrical shape of lesser diameter as compared to the original one.
  • FIG. 1 schematically shows a vertical section of the machine according to the present invention, in the position taken by its various parts and components before starting the processing operations, and
  • HO. 2 shows a plan view, partially in section, of the machine of FIG. 1.
  • the machine comprises a bedplate, not shown, to which is fastened the part 1, integral with the rod 2 of a piston 3 which carries, through another rod 2', a die 4 provided with a suitable seat or cradle 4', which receives the extremity 5 of the tube 6.
  • a support 7 to which a hydraulic cylinder 8-to be described later-is secured, and a vertical magazine 9 for olive-shaped mandrels 1(
  • a piston 3 is disposed at the inside of a hydraulic cylinder 11 (which also constitutes the movable section of the machine) which is integral with'a support 12 provided with a hydraulic cylinder 13 whose piston 14 actuates a die 15 also provided with a suitable seat 15 arranged for cooperation with the upper portion of the extremity 5 of the tube 6.
  • a pair of hydraulic cylinders 16 whose pistons 17 actuate the punches 18, the extremities of which are V-shaped and are arranged to plastically deform the pipe on opposite sides, so as to form a pair of dents thereon.
  • two hydraulic cylinders 19 are provided having pistons 20 integral with dies 21 and punches 21' of suitable shape, arranged for plastically deforming, on opposite sides, the extremity 5 of the tube 6.
  • the cylinder 8 is provided with a first piston 22 which slides in a first chamber 23 of said cylinder and which provides for axial movement of a thrust bar 28 arranged for entering into the extremity 5 of the tube 6 so as to push an olive-shaped mandrel 10 in the inside of the latter.
  • the second piston 25 of the cylinder 8 performs its movement in a second chamber 24 and its rod 26 slides in a chamber (not shown) provided at the inside of the rod 27 of piston 22, in order to pressurize the lubricating oil contained therein and to cause it to flow out through a bore 29 provided at the inside of the thrust bar 28.
  • the various hydraulic cylinders described above are connected, by means of suitable pipings (not shown) with appropriate sources of pressurized fluid.
  • the hydraulic circuit also includes suitable devices of known kind (such as valves, distributors, timing devices, limit switches and the like) by which the various hydraulic cylinders can be actuated in selected sequence and in the instants desired, so as to automatically perform the following sequence of operations.
  • the tube 6 is initially placed on the upper seat 4' of the die 4 with the end of the tube against the surface of the loader 9 facing towards the die 4. In this manner a very accurate positioning of the tube is obtained, and this positioning is maintained during all the subsequent processing stages of the tube on said machine. Subsequently, hydraulic fluidactuates piston 14 of cylinder 13, thereby pushing the die 15 against the end portion 5 of the tube; the seat 15' thus, in cooperation with seat 4' of die 4, firmly locks the end of tube 5 in place.
  • the first processing stage begins, by sending oil under pressure into the chambers of the hydraulic cylinders 16, whose pistons 17 and punches 18 are pushed towards the tube and the punches 18 to plastically deform said tube on opposite sides, thereby forming a pair of dents thereon.
  • the next operation i.e. the introduction of the olive-shaped mandrel
  • first displacing piston 22 of the cylinder 8 so that the thrust bar 28 will withdraw away from the mandrel magazine 9 and thereby release one of the oliveshaped mandrels 10 allowing it to drop into correspondence with the axis of the tube 5.
  • piston 22 is displaced in a direction so as to push said mandrel into the interior of the tube 6, until said mandrel reaches the desired position in correspondence with the dents formed during the preceding operation.
  • the thrust bar is then brought back to its starting position shown in FIG. I.
  • the punches 18 which have performed the indenting operation, as aforesaid, will also be brought to their starting position; to do so, it will be only necessary to exert a suitable action on the hydraulic pistons 16.
  • the subsequent operation i.e. the formation of a cylindrical point at the end of the tube
  • the subsequent operation i.e. the formation of a cylindrical point at the end of the tube
  • the subsequent operation i.e. the formation of a cylindrical point at the end of the tube
  • the subsequent operation i.e. the formation of a cylindrical point at the end of the tube
  • the subsequent operation i.e. the formation of a cylindrical point at the end of the tube
  • the subsequent operation i.e. the formation of a cylindrical point at the end of the tube
  • two paris of dies or punches each of which will exert on said tube two forces in opposite directions, namely directed towards the inside of the tube, which display their action in a plane nearly at right angles to the plane of action of the forces produced by the dies or punches of the other couple.
  • a cylindrical thrust bar coaxial with the end of the tube and actuated by a hydraulic cylinder, which bar can be displaced axially relative to the tube so as to release a lowermost mandrel from the mandrel magazine and to subsequently push the said mandrel into the tube, said thrust bar being provided with a central bore through which lubricant is fed into said tube before the introduction of the mandrel;
  • an upper movable section which comprises:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US774144A 1967-11-09 1968-11-07 Automatic machine for preparing the ends of metal pipes for the drawing operation Expired - Lifetime US3587287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5365667 1967-11-09

Publications (1)

Publication Number Publication Date
US3587287A true US3587287A (en) 1971-06-28

Family

ID=11284390

Family Applications (1)

Application Number Title Priority Date Filing Date
US774144A Expired - Lifetime US3587287A (en) 1967-11-09 1968-11-07 Automatic machine for preparing the ends of metal pipes for the drawing operation

Country Status (7)

Country Link
US (1) US3587287A (de)
JP (1) JPS4820983B1 (de)
AT (1) AT291161B (de)
DE (1) DE1807814A1 (de)
FR (1) FR1587564A (de)
LU (1) LU57123A1 (de)
SE (1) SE357683B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3827274A (en) * 1972-10-20 1974-08-06 Aetna Standard Eng Co Strand drawing apparatus including means for preparing the leading end of the strand
US20040149000A1 (en) * 2003-02-04 2004-08-05 Stupecky Josef J. Swaging machine and method of use
US9833600B2 (en) 2005-12-16 2017-12-05 Interface Associates, Inc. Methods for manufacturing multi-layer balloons for medical applications
US10639690B2 (en) 2016-07-22 2020-05-05 Sms Group Gmbh Preparing a tube end for rod drawing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61152315U (de) * 1985-03-13 1986-09-20
DE3634229C1 (en) * 1986-10-08 1987-12-17 Rudolf Bueltmann Device for grasping a tube to be drawn

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3827274A (en) * 1972-10-20 1974-08-06 Aetna Standard Eng Co Strand drawing apparatus including means for preparing the leading end of the strand
US20040149000A1 (en) * 2003-02-04 2004-08-05 Stupecky Josef J. Swaging machine and method of use
US7010953B2 (en) * 2003-02-04 2006-03-14 Interface Associates, Inc. Swaging machine and method of use
US9833600B2 (en) 2005-12-16 2017-12-05 Interface Associates, Inc. Methods for manufacturing multi-layer balloons for medical applications
US10835720B2 (en) 2005-12-16 2020-11-17 Confluent Medical Technologies, Inc. Methods for manufacturing multi-layer balloons for medical applications
US11311702B2 (en) 2005-12-16 2022-04-26 Confluent Medical Technologies, Inc. Methods for manufacturing multi-layer balloons for medical applications
US10639690B2 (en) 2016-07-22 2020-05-05 Sms Group Gmbh Preparing a tube end for rod drawing

Also Published As

Publication number Publication date
SE357683B (de) 1973-07-09
JPS4820983B1 (de) 1973-06-25
DE1807814A1 (de) 1969-06-12
AT291161B (de) 1971-07-12
DE1807814B2 (de) 1970-11-12
FR1587564A (de) 1970-03-20
LU57123A1 (de) 1969-01-27

Similar Documents

Publication Publication Date Title
US3402591A (en) Apparatus for making drawn and ironed cans or containers
US3733881A (en) Method and apparatus for making deep drawn metal shells
US1983618A (en) Forging apparatus
US3733873A (en) Method of and apparatus for compression forging of components
US3328996A (en) Device and method for manufacturing elbow fittings from straight tubing
US3587287A (en) Automatic machine for preparing the ends of metal pipes for the drawing operation
US3572080A (en) Production of pointed workpieces
US3453857A (en) Apparatus and method of bending pipe
US2392797A (en) Manufacture of metal tubular articles
US3303680A (en) Method and means for forming fittings
US3103068A (en) Method for interconnecting malleable tubing and fittings therefor
US3247533A (en) Method and apparatus for forming headed blanks
JPH03216217A (ja) 曲管製造方法及びその装置
US1429924A (en) Method for bending pipes or tubes
US3411338A (en) Tube flaring apparatus
US3243986A (en) Production of large diameter thin-walled tubing
US2597623A (en) Apparatus for manufacturing taper tubing
US3349596A (en) Method and apparatus for making pinion wire and the like
US1945079A (en) Method of forming axle housings
US3036696A (en) Method of producing seamless tubular articles
US2406392A (en) Apparatus for applying rotating bands to projectile shells
US3216092A (en) Method for making wrought y-fittings from a tubular work piece
US2280255A (en) Apparatus for making headers
US2249775A (en) Method of producing tubular metallic bodies
US2102099A (en) Enlarging the diameter of hollow metal articles