Classifications

• • 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
  • B21D7/00—Bending rods, profiles, or tubes
  • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
  • B21D7/063—Pliers with forming dies

Definitions

• Said at least one former may have at least one start index.
• Said at least one start index may be a part of at least one scale graduated in angular degrees.
• Said former may have at least one finely graduated overbending index.
• Said at least one overbending index may correspond to a pipe bending of approx. 91-93°, preferably approx. 93°.
• Said at least one sliding jaw may have at least one start index.
• Said at least one sliding jaw may have at least one pipe-positioning index.
• Said first branch may have at least one holder-on for pipes that are being bent.
• Said first branch may have at least one part protruding from the tool and respectively provided with at least two basically plane-parallel sides suitable for vice attachment.
• Said at least one former may have the shape of a modified cylinder segment, the periphery of which has at least one groove for the receipt of said pipe to be bent, and the centre of which has at least a first shaft having a direction of extension that is substancially perpendicular to a substancial plane of extension of said modified cylinder segment.
• the invention also embraces a former for use as a part of a tool for pipe bending, said tool, in addition to at least one former, comprising at least two branches, intended to be gripped and pressed together by an operator upon pipe bending, at least one link arm, and at least one sliding jaw, said at least one former and said at least one sliding jaw being intended to be placed on either side of a pipe to be bent, and said at least one former being fitted to, or constituting a part of, a first branch of said at least two branches at the same time as said at least one sliding jaw being fitted to, or constituting a part of, a second branch of said at least two branches.
• the former has at least one pipe-positioning index, one of which is intended to be placed as close as possible to a corresponding bending- measure index on the pipe when the pipe is placed in the tool in order to be bent.
• the substancially perpendicular distance, before bending, between, on one hand, a plane through said pipe-positioning index as well as through said bending- measure index and simultaneously substantially perpendicular to the substancial direction of extension of the pipe and, on the other hand, a first end of the pipe may be substantially equal to the substantially perpendicular distance, after bending, between, on one hand, a plane substantially coincident with a substantially straight centre line in a first part of the pipe and simultaneously substantially perpendicular to the substancial direction of extension of a second part of the pipe and, on the other hand, said first end of the pipe.
• the former may have at least one start index.
• Said at least one start index may be a part of at least one scale graduated in angular degrees.
• the former may have at least one finely graduated overbending index.
• Said at least one overbending index may correspond to a pipe bending of approx. 91-93°, preferably approx. 93°.
• a first branch 1 having a handle part 2 and a second branch 3 having a handle part 4 are intended to be gripped by an operator.
• the first branch 1 shows, in the end being most distant from the operator, an holder-on 5, a part 6 for vice attachment, and a former 7.
• the second branch 3 shows, in the end being most distant from the operator, a link arm 8 and a sliding jaw 9.
• a first shaft 10 in a corresponding first mounting in the former 7 and/or the link arm 8 pivotably unites the former 7 and the link arm 8.
• a second shaft 11 in a corresponding second mounting in the link arm 8 and/or the second branch 3 pivotably unites the link arm 8 and the second branch 3.
• the presence of the shafts 10, 11 means that the first branch 1 is pivotably united to the second branch 3 and that the tool can be manoeuvred by an operator having a branch 1 , 3 in each hand.
• each one of said pipes instead extends through only a part of the corresponding handle part 2, 4 or not at all extends through the corresponding handle part 2, 4.
• the two pipes may also be differently long and extend differently far through the respective corresponding handle part, the elastomer or another suitable material making up so that the branches 1 , 3 become substancially equally long.
• a transport locking device 2a see Figure 5, in the form of a strap that forms at least one loop. If the loop is threaded over the second handle part 4, the handle parts 2, 4 and thereby also the branches 1 , 3 are kept well together during transportation of the tool.
• the strap of the transport locking device is deflectable and flexible and manufactured from elastic textile, rubber or the like.
• the holder-on 5 has a curved hook-like shape, see particularly Figures 3 and 4, to be able to retain a pipe 12 in connection with a bending operation. With the concept bending ("bockning") the same as bending (“b ⁇ jning”) is here meant and as a result of the operation, a pipe bend is obtained.
• the part 6 for vice attachment protrudes from the tool and is provided with two substancially plane- parallel sides 13, 14 suitable for vice attachment.
• the former 7 has the shape of a modified cylinder segment, the periphery of which has a groove 15 for the receipt of said pipe 12 to be bent.
• the groove 15 extends alongside said periphery along at least a semicircle in a substancial plane of extension of said modified cylinder segment, which plane of extension is parallel to the plane of the paper in the Figures 2 and 5-7.
• This semicircle shows a first radius corresponding to the perpendicular distance between the bottom of the groove 15 and the centre of the shaft 10, which first radius should be chosen in view of the dimension of the pipe 12 to be bent, the radius being chosen to be approx. 37-47 mm, preferably approx. 42 mm for pipe dimension 12, and approx. 50-60 mm, preferably approx. 55 mm for pipe dimension 15.
• said first radius should be smaller than or possibly equal to four times the diameter of the pipe 12. Said first radius corresponds directly to the resulting bending radius of the pipe 12.
• a pipe-positioning index 18 and a pipe- positioning index 19 are present, which are located along an imaginary, basically straight, line starting from an imaginary extension of the marking for 0° on the scale 17, the pipe-positioning index 18 being located closer than the pipe- positioning index 19 to the marking for 0° on the scale 17, and said line extending substancially parallel to each pipe piece 12 properly placed in the tool in order to be bent.
• the former 7 also shows five particular overbending indexes 20.
• an extra handle part/thumb-grip part may be present on the former 7.
• the sliding jaw 9 is attached to the second branch 3 by two pins 21 of a suitable type, e.g., tension pins 21.
• a plane substancially coincident with a substancially straight centre line here is meant a plane that intersects the centre line and simultaneously extends substancially parallel to the same, i.e., the centre line lies entirely in the plane.
• the scale 17 is easily read since the markings and the numerals are clearly made, recessed and have a deviating colour, and the same applies to occurring start, pipe-positioning and overbending indexes on the former 7 and the sliding jaw 9.
• the special part 6 for vice attachment means a simple mounting in this way.
• the particular transport locking device 2a facilitates transportation and storing of the tool.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)
• Conveying And Assembling Of Building Elements In Situ (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39324862

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (3)

Citations (5)

Family Cites Families (16)

• 2007
  • 2007-10-24 US US12/447,226 patent/US20090266137A1/en not_active Abandoned
  • 2007-10-24 EP EP07835360A patent/EP2076340A4/en not_active Withdrawn
  • 2007-10-24 CN CN2007800394603A patent/CN101528375B/zh not_active Expired - Fee Related
  • 2007-10-24 WO PCT/SE2007/050776 patent/WO2008051162A1/en active Application Filing
• 2009
  • 2009-02-25 NO NO20090869A patent/NO20090869L/no not_active Application Discontinuation

Patent Citations (5)

Non-Patent Citations (1)

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