US3713317A - Bending machine - Google Patents

Bending machine Download PDF

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Publication number
US3713317A
US3713317A US00174641A US3713317DA US3713317A US 3713317 A US3713317 A US 3713317A US 00174641 A US00174641 A US 00174641A US 3713317D A US3713317D A US 3713317DA US 3713317 A US3713317 A US 3713317A
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US
United States
Prior art keywords
mandrel
axles
carrier
mandrel carrier
mandrels
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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
US00174641A
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English (en)
Inventor
R Schenck
G Schenck
F Senft
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Schenck Corp
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Schenck Corp
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Publication date
Application filed by Schenck Corp filed Critical Schenck Corp
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    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete

Definitions

  • BENDING MACHINE [75] Inventors: Robert L. Schenck, York; George E. Schenck, Dallastown; Frank W. Senft, York, all of Pa.
  • ABSTRACT A bending machine having a mandrel carrier, two axles passing through the carrier on a diameter thereof and mandrels mounted on the axles, there being a space between the closest points of the mandrels for the workpiece to pass through.
  • Journals in a fixed frame are provided for the axles so that the carrier can be rotated about the axis of either axle.
  • the carrier is provided with sprocket teeth about its periphery, and is rotated by a chain passing around the sprocket to form a shape generally like a U.
  • the ends of the chain are attached to drive rods which are hydraulically moved to pull the chain and rotate the carrier in either direction.
  • the journals are arcuate and open away from the drive rods, the action of the rods and chain being in a direction to keep one axle in continuous bearing contact with its associated journal. Guide sprockets assist in this task.
  • FIG. 3 ROBERT L. SCHENCK GEORGE E. SCHENCK FRANK w. SENFT ATTORNEYS.
  • This invention relates to a bending machine and, more specifically, a drive mechanism fora machine for bending and forming elongated rod or bar stock.
  • an improved bending machine includes double mandrels rotatable about the axis of either mandrel for bending elongated rod or bar stock, journal means for the axles of either of the mandrels, a mandrel carrier for supporting the axles of the mandrels and the mandrels themselves, and flexible drive means for rotating the mandrel carrier and for causing the rotation of the carrier and either mandrel axle about the axis of the other.
  • FIG. 1 is a side elevation, in partial section, of an apparatus in accordance with the invention
  • FIG. 2 is a horizontal sectional view along lines 22 of FIG. 1;
  • FIG. 3 is a partial side elevation of a portion of the apparatus of FIGS. 1 and 2 showing bending positions.
  • the apparatus includes a main frame 5 which is shown in section and which is provided with a generally rectangular opening indicated at 6, through which the drive mechanism passes. Near one vertical edge of opening 6 there is provided a bearing block 7 which is provided with two v ertically'spaced arcuate bearing surfaces 9 opening away from frame 5. At the front of opening 6 frame 5 carries a second bearing block 8, seen in FIG. 2, block 8 being provided with similar arcuate bearing surfaces coaxially aligned with the bearing surfaces in block 7.
  • a mandrel carrier 10 which has a generally cylindrical shape, lies generally between blocks 7 and 8 and is provided with two axles 11 and 12, which extend completely through mandrel 10 on centers which are equally spaced from the central axis of the mandrel carrier and which lie on one diameter thereof.
  • Rear stub portions of axles l 1 and 12 protrude from the back surface of the mandrel carrier and are dimensioned to mate with the arcuate bearing surfaces of block 7.
  • the portions of axles 11 and 12 which protrude from the front surface of mandrel carrier 10 are provided with bushings and mandrels, axle 11 being provided with a bushing 14 and a mandrel l5, and axle 12 being provided with a mandrel 16.
  • bushings are provided with bearing surfaces and shoulders to mate with the arcuate recesses 9 in block 8 and that the shoulders on the bushings and at the rear surface of the mandrel carrier prevent significant axial movement of the carrier and its associated components with regard to frame 5.
  • the mandrel carrier is also provided with two substantially identical sprockets l7 and 18 which surround the mandrel carrier and are fixedly attached thereto.
  • bracket assembly 20 having front and rear plates with suitable bearing structures of conventional nature to support axles for a plurality of sprockets which are mounted on horizontal axes and which lie in the planes of the sprockets on mandrel carrier 10. Specifically, as
  • the sprockets are mounted in pairs, each pairhaving one sprocket aligned in a plane with sprocket l7 andthe other lying in the same plane as sprocket 18.
  • sprockets 21 and 22 are aligned with sprockets 17 and 18, respectively, and are mounted on a common axle 23.
  • sprockets 24 and 25 are aligned with sprockets 17 and 18, respectively, and are mounted on a common axle 26.
  • a pair of flexible link chains, 31 and 32, of a type generally referred to as bicycle chains, are passed around sprockets 17 and 18 on mandrel carrier 10 and between respective pairs of the sprockets supported in bracket 20. From the upper portion of mandrel carrier 10 the chains pass over sprockets 24 and 25 and under sprockets 21 and 22, while the portion of the chain attached to the bottom segment of mandrel carrier 10 passes under the sprockets supported on axle 30 and over the sprockets supported on axle 29. As will be seen in FIG. 2, the portions of the chains extending across the upper portion of mandrel carrier 10 and over sprockets 24 and 25 have been omitted to show the sprockets in plain view.
  • the workpiece 50 is inserted between mandrelsIS and 16 in a direction perpendicular to the axes of the mandrels and also perpendicular to the plane in which the axes of the mandrels lie in their home or central position as shown in FIG. 1. Then, in order to produce a bend in an upward direction, fluid pressure is applied to port 39 of cylinder 38 while ports 40 and 42 are vented. The fluid pressure thus applied causes the piston within the cylinder 38 to move away from the mandrel carrier, pulling drive rod 35 to the left as shown in the figures.
  • drive rod 36 necessarily moves to the right while drive rod 35 moves to the left. It is generally the case that port 42 can, be openly vented and that the fluid emerging from that vent will cause drive rod 36 to move slowly and maintain a minimum slack condition in the lower portion of the chain.
  • athrottle vent can be used to cause a braking action in rod 36 to restrain the lower portion of the chain from becoming slack. Maintaining that portion of the chain taut, at least between the lower sprocket pair and the mandrel carrier, is important, because the lower portion of the chain assists in maintaining axle 11 in firm bearing engagement with its arcuate journal recess.
  • the idle sprockets maintain the chain between the drive rods and the mandrel carrier in proper position so that the selected one of axles 1 1 and 12 is maintained in engagement with its associated arcuaterecesses in blocks 7 and 8. Also, these sprockets prevent the chain from striking the surfaces of opening In orderto remove and replace the mandrel carrier it is simply necessary to vent ports 39 and 42, pull the carrier and the chain away from the bearing blocks until they are clear, and then disengagethe chains from sprockets 17 and 18. The replacement carrier is simply reengaged with the chain and restored to the position shown in FIG. LMandrels and carriers canbe quickly and easily substituted in this manner to enable the machine to bend rods of different sizes.
  • a bending machine comprising the combination of first and second axles
  • first and second mandrels carried respectively by said first and second axles; mandrel carrier means for supporting said first and second axles in parallel spaced relationship so that said mandrels are spaced apart by a distance at least as great as the thickness of a workpiece to be bent;
  • first and second semicircular bearing means for said first and second axles, respectively; means for inserting a workpiece between said mandrels andfor holding said workpiece in the inserted position;
  • means for rotating including an elongated flexible drive element partially encircling and positively engaging said mandrel'carrier;
  • said mandrel carrier is provided with means for mating in positive engagement with said chain.
  • a bending machine according to claim 1 wherein said means for pulling includes a piston and cylinder assembly connected to each end of said band, and means for conducting fluid under pressure to said cylinder.
  • a bending machine according to claim 1 wherein said drive element is a bicycle chain and said mandrel carrier is provided with sprocket teeth surrounding said carrier.
  • a bending machine according to claim 4 wherein said means for rotating further includes A plurality of idler sprockets, disposed between said mandrel carrier and said means for pulling, to guide said chain.
  • a bending machine comprising the combination of a mandrel carrier mounted for rotation and translation about either one of first and second axes;
  • first and second mandrels carried by said mandrel carrier and extendingfrom one face thereof
  • said mandrels being mounted on said first and second axes which areparallel with each other,
  • said first and second axes being on one diameter of said mandrel carrier
  • a bending machine according to claim 6 wherein said first and second mandrels include cylindrical surfaces, and
  • spacing between said first and second axes and the diameter of said mandrels are selected to provide a minimum distance between said mandrels which is slightly greater than'the diameter of the rod to be bent.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US00174641A 1971-08-25 1971-08-25 Bending machine Expired - Lifetime US3713317A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17464171A 1971-08-25 1971-08-25

Publications (1)

Publication Number Publication Date
US3713317A true US3713317A (en) 1973-01-30

Family

ID=22636925

Family Applications (1)

Application Number Title Priority Date Filing Date
US00174641A Expired - Lifetime US3713317A (en) 1971-08-25 1971-08-25 Bending machine

Country Status (9)

Country Link
US (1) US3713317A (fr)
JP (1) JPS5211307B2 (fr)
AU (1) AU449839B2 (fr)
CA (1) CA938539A (fr)
CH (1) CH539468A (fr)
DE (1) DE2237728C3 (fr)
FR (1) FR2150503B1 (fr)
GB (1) GB1346968A (fr)
IT (1) IT961411B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226784A (en) * 1988-12-30 1990-07-11 Usui Kokusai Sangyo Kk Apparatus for bending thin metallic pipes.
US5014533A (en) * 1987-06-03 1991-05-14 Ergon S.A. Wire processing machine
FR2685228A1 (fr) * 1991-12-23 1993-06-25 Automation Franc Machine a cintrer un element du type tige, barre, tube, fil ou analogue.
US5373719A (en) * 1991-02-04 1994-12-20 Rigobert Schwarze Device for generating bent portions in a pipe, particularly for generating a pipe coil
FR2744941A1 (fr) * 1996-02-16 1997-08-22 Scdc Sarl Procede et dispositif de cambrage de fils metalliques
US5782124A (en) * 1996-10-30 1998-07-21 Lee; Jimmy D. High force rebar bending machine
US20050017120A1 (en) * 2003-07-21 2005-01-27 Mcgushion Kevin Center shifted roll forming
US20070125143A1 (en) * 2004-07-21 2007-06-07 Mcgushion Kevin D Jr Center shifted roll forming
CN101879543A (zh) * 2010-06-08 2010-11-10 爱克(苏州)机械有限公司 数控折弯机同步随动托料装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5432896Y2 (fr) * 1973-03-15 1979-10-12
JPS55126321A (en) * 1979-03-20 1980-09-30 Mitsui Eng & Shipbuild Co Ltd Bending machine for metallic material
FR2747328B1 (fr) * 1996-04-10 1998-06-19 Robolix Sa Machine a cintrer ou a cambrer un profile, et tete de cintrage pour une telle machine
JP2007290022A (ja) * 2006-04-27 2007-11-08 Maruyasu Industries Co Ltd 曲げ加工装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396182A (en) * 1944-09-02 1946-03-05 Alfred L Kibler Tube bending machine
US2454290A (en) * 1946-08-01 1948-11-23 Bundy Tubing Co Apparatus for bending work such as tubing into serpentine coils

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396182A (en) * 1944-09-02 1946-03-05 Alfred L Kibler Tube bending machine
US2454290A (en) * 1946-08-01 1948-11-23 Bundy Tubing Co Apparatus for bending work such as tubing into serpentine coils

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014533A (en) * 1987-06-03 1991-05-14 Ergon S.A. Wire processing machine
GB2226784A (en) * 1988-12-30 1990-07-11 Usui Kokusai Sangyo Kk Apparatus for bending thin metallic pipes.
GB2226784B (en) * 1988-12-30 1993-02-24 Usui Kokusai Sangyo Kk Device for bending thin metallic pipe or rod
US5373719A (en) * 1991-02-04 1994-12-20 Rigobert Schwarze Device for generating bent portions in a pipe, particularly for generating a pipe coil
FR2685228A1 (fr) * 1991-12-23 1993-06-25 Automation Franc Machine a cintrer un element du type tige, barre, tube, fil ou analogue.
FR2744941A1 (fr) * 1996-02-16 1997-08-22 Scdc Sarl Procede et dispositif de cambrage de fils metalliques
US5782124A (en) * 1996-10-30 1998-07-21 Lee; Jimmy D. High force rebar bending machine
US20050017120A1 (en) * 2003-07-21 2005-01-27 Mcgushion Kevin Center shifted roll forming
WO2005009639A2 (fr) * 2003-07-21 2005-02-03 Kevin Mcgushion Formation de rouleau a centre decale
WO2005009639A3 (fr) * 2003-07-21 2005-05-26 Kevin Mcgushion Formation de rouleau a centre decale
US20070125143A1 (en) * 2004-07-21 2007-06-07 Mcgushion Kevin D Jr Center shifted roll forming
CN101879543A (zh) * 2010-06-08 2010-11-10 爱克(苏州)机械有限公司 数控折弯机同步随动托料装置

Also Published As

Publication number Publication date
JPS5211307B2 (fr) 1977-03-30
IT961411B (it) 1973-12-10
GB1346968A (en) 1974-02-13
AU4414972A (en) 1974-01-10
FR2150503A1 (fr) 1973-04-06
JPS4831169A (fr) 1973-04-24
DE2237728B2 (de) 1978-01-12
AU449839B2 (en) 1974-06-20
FR2150503B1 (fr) 1978-12-29
CA938539A (en) 1973-12-18
DE2237728A1 (de) 1973-03-08
CH539468A (de) 1973-07-31
DE2237728C3 (de) 1978-09-07

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