US3685335A - Tube bender - Google Patents

Tube bender Download PDF

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Publication number
US3685335A
US3685335A US87258A US3685335DA US3685335A US 3685335 A US3685335 A US 3685335A US 87258 A US87258 A US 87258A US 3685335D A US3685335D A US 3685335DA US 3685335 A US3685335 A US 3685335A
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US
United States
Prior art keywords
tube
mandrel
bend
shoe
axis
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
US87258A
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English (en)
Inventor
Leonard J Kowal
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.)
Clevite Industries Inc
IMP Eastman Corp
Original Assignee
IMP Eastman Corp
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Filing date
Publication date
Application filed by IMP Eastman Corp filed Critical IMP Eastman Corp
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Publication of US3685335A publication Critical patent/US3685335A/en
Assigned to IMPERIAL CLEVITE INC. reassignment IMPERIAL CLEVITE INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: I-T-E IMPERIAL CORPORATION
Assigned to CLEVITE INDUSTRIES INC., A CORP. OF DE. reassignment CLEVITE INDUSTRIES INC., A CORP. OF DE. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: IMPERIAL CLEVITE INC., A PA. CORP. (MERGED INTO)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
    • 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

  • hook means are provided for restraining the tube against movement during the bending operation.
  • the conventional hook means comprises a hook-shaped element swingably mounted in the tool so as to be disposed in a first position away from the bend start position permitting the tube to be inserted laterally between the shoe and mandrel to the bend start position.
  • the hook is then swung to engage the tube for restraining the tube against movement during a subsequent bending operation wherein the shoe is moved against the outer surface of the tube to press the tube progressively into the mandrel groove.
  • the hook is fixedly associated with one of the handles of the tool so as to permit swinging of the hook as an incident of swinging of the handle relative to the mandrel.
  • the present invention comprehends an improved about the mandrel to bend a tube in a radially outwardly opening groove of the mandrel.
  • a hook is fixedly secured to the mandrel adjacent the bend start point and recess means are provided to accommodate a lateral movement of the tube into the fixed hook recess.
  • the shoe is movably associated with the mandrel by connecting means permitting the shoe to urge the tube to the bend start position at the bend start point of the mandrel groove.
  • the hook engages the tube to restrain the same from movement during a subsequent bending operation wherein the shoe is moved along the outer surface of the tube about the mandrel to press the tube progressively into the mandrel groove to effect the desired bend.
  • one of the handles is also fixedly secured to the mandrel and more specifically is formed integral with the hook.
  • a single securing means is provided for fixedly securing both the hook and the fixed handle to the mandrel.
  • the present invention further comprehends an improved arrangement of the connecting means for controlled positioning of the shoe prior to the bending operation including facilitated positioning thereof in spaced relationship to the mandrel for facilitating insertion of the tube laterally into the hook adjacent the bend start point.
  • Means may be associated with the shoe for frictionally locking the shoe in different desired positions relative to the connecting means. Movement of the shoe to the bend start position effects an automatic swinging of the tube to the bend start disposition thereof.
  • the tool is arranged to permit the use thereof as a hickey for performing fast bending of tubing by means of the fixed hook and mandrel association.
  • tube bender having a mandrel and shoe means movable
  • the tube bender is extremely simple and economical of construction while yet providing the improved tube bending functioning discussed above.
  • FIG. 1 is a front elevation of a tube bender embodying the invention with the shoe portion being shown in dotted lines in a bend start position and in full line in the bend completed position;
  • FIG. 2 is a fragmentary rear elevation thereof
  • FIG. 3 is a fragmentary left side elevation with the shoe in the bend start position in full line and in the 90 bend completed position in dotted lines;
  • FIG. 4 is a fragmentary front elevation of the tube bender in open arrangement upon insertion of the tube to be bent thereinto;
  • FIG. 5 is a fragmentary front elevation illustrating the movement of the shoe to the bend start position
  • FIG. 6 is a fragmentary section taken substantially along the line 6-6 of FIG. 1;
  • FIG. 7 is a section taken substantially along the line 7-7 of FIG. 1;
  • FIG. 8 is a fragmentary rear elevation of the tube bender in the 90 bend completed position.
  • a tube bender generally designated 10 is shown to comprise a mandrel 11 a first handle 12, a second handle 13, a bending shoe 14, means 15 for movably connecting the bending shoe to the mandrel, and a hook 16.
  • the mandrel defines an axis 17 and is provided with a circumferential segmentally annular bending groove 18 extending coaxially to axis 17 forwardly from a bend start point 19.
  • a tube T to be bent is inserted into the tool adjacent bend start point 19 whereupon swinging movement of the bending shoe 14 about axis 17 adjacent groove 18 progressively bends the tube into the groove 18 to form a desired bend.
  • the tube is shown as being bent to form a 90 bend, it being obvious to those skilled in the art that any suitable angular bend may be provided as desired up to a bend.
  • Connecting means 15 includes a link 20.
  • One end 21 of link 20 is swingably mounted to mandrel 11 by a pivot 22.
  • the link is urged frictionally against the side wall 23 of the mandrel by a spring washer 24 disposed between the opposite side wall 25 of the mandrel and a head 26 on the pivot 22.
  • Shoe 14 is swingably mounted to the other end 27 of the link by a pivot 28.
  • the link is frictionally urged against one face 29 of shoe 14 by a spring washer 30 disposed between a head 31 of the pivot and the other surface 32 of the shoe.
  • the connecting link is frictionally held in any one of an infinite number of positions relative to the axis of pivot 22 and to the axis of pivot 28 as desired by the user for selective retained positioning of the shoe 14 relative to the mandrel l 1.
  • tube T is restrained by hook 16 against movement during the bending operation.
  • Hook 16 is fixedly associated with mandrel 11 by a locking screw 33 and a pair of shoulders 34 and 35 engaging the opposite side wall faces 23 and 25 of the mandrel, as best seen in FIG. 6.
  • Hook 16 defines a tube receiving recess 36 having a height, as best seen in FIG. 1, substantially greater than the diameter of .tube T.
  • tube T may be inserted into hook recess 36 to extend through the space between shoe 14 and mandrel l1 radially outwardly of bend-start point 19 with the shoe swung to an outermost spaced position wherein link 20 is swung on pivot 22 to abut hook 16.
  • hook 16 functions to limit automatically the movement of the connecting means to the spaced position of FIG. 4.
  • handle 13 may be manipulated to swing the shoe in a counterclockwise direction on pivot 28 thereby to space the shoe tube-engaging portion 37 outwardly from the mandrel to readily accommodate the tube T therebetween.
  • the axis 38 of tube T is disposed in the plane of the center 39 of bending groove 18 when the tube is moved laterally fully into hook space 36.
  • Handle 13 is then swung on pivot 28 while maintaining link 20 against hook 16 by suitable manipulation of the handle from the position of FIG. 4 to the position of FIG. 5.
  • the swinging movement is continued until shoe surface 37 engages tube T swinging the tube T to a bend-start position wherein the tube extends axially perpendicularly to a line betweenbend-start point 19 and mandrel axis 17, as shown in FIG. 5.
  • the tube is urged upwardly, as seen in FIG. 5, against book 16 and downwardly to bottom in the mandrel groove 18.
  • Shoe 14 is further provided with a stop 40 which engages the link 20 prior to the movement of the shoe surface 37 into parallel relationship with tube T whereby further swinging movement of handle 13 causes link 20 to swing on pivot 22 about axis 17 to the bend-start position shown in dotted lines in FIG. 1. In this position, link 20 extends substantially parallel to the line between bend-start point 19 and mandrel axis 17.
  • the mandrel is provided with a recessed portion 41 rearwardly of bend-start point 19.
  • the spacing of pivots 22 and 28 may be main tained relatively small, while yet permitting ready insertion and withdrawal of the tube relative to the tube bender.
  • Hook 16 may be provided with a slight rearward angle in recess 36, such as approximately 2 or 3, to cause the leading edge 42 thereof to bite slightly into the surface of tube T and effectively positively preclude axial movement of the tube during the bending operation.
  • the bending forces generated by shoe 14 against tube T are primarily inwardly toward the mandrel axis 17. However, frictional forces tend to move the tube axially during forming operations and are resisted by the hook as discussed above.
  • Bending of the tube is effected by further movement of handle 13 to swing the shoe on link 20 about mandrel axis 17in a clockwise direction seen in FIG. 1. During this operation stop remains in abutment with link 20 to maintain the shoe surface 37 substantially tangential to the radius of the mandrel groove about axis 17.
  • the user Upon completion of the desired bend, the user need merely swing handle 13 in a counterclockwise direction, as seen in FIG. 1, thereby disengaging stop 40 from link 20 and permitting the handle to be swung on pivots 28 and 22 back to the open position of FIG. 4.
  • the bent tube may be readily removed from the tube bender by a slight movement thereof outwardly from the mandrel groove and in a counterclockwise direction about axis 17 to clear the mandrel groove and hook with the portion of the tube extending rearwardly from bend start point 19 being arranged substantially as shown in dotted lines in FIG. 4 so as to pemiit ready lateral movement of the tube outwardly from the tube bender.
  • the invention comprehends an improved tube bender utilizing a recessed portion 41 of the mandrel in cooperation with a hook 16 fixedly associated with the mandrel and a shoe 14 movably associated with the mandrel to have selectively spaced association therewith and juxtaposed therewith.
  • the hook 16 is positively aligned with the mandrel groove by the shoulders 34 and 35 cooperating with the mandrel side faces thereby to provide a maintained retention of the tube against movement during the bending operation.
  • Hook 16 not only serves to retain the tube against movement but also functions as a stop for limiting the pivotal movement of the handle in'the open arrangement as shown in FIG. 4, and as a stop for limiting the swinging movement of the link 20 in the open arrangement.
  • the tube T may be readily inserted into the tube bender with an automatic sufficient clearance between the shoe 14 and mandrel being provided.
  • Relative movement between handles 12 and 13 is controlled by the friction springwashers, thereby facilitating manipulation of the handles and insertion and removal of the tube.
  • the shoe is mounted on the. connecting means in such a manner as to cause an automatic swinging of the tube to the bend start position of FIG. 1 perpendicular to the radial line between bend start point 19 and mandrel axis 17 for further facilitated bending of the tube.
  • the tube bender may be used as a hickey for effecting rough fast bends as by holding of the handles together in substantially parallel relationship to expose the hook and recessed mandrel portions for engagement with the tube to be so bent.
  • Tube bender 10 is extremely simple and economical of construction with a minimum of separate parts, while yet providing the improved facilitated tube bending operation discussed above.
  • a tube bender comprising: a mandrel having an axis and a segmentally annular, radially outwardly opening tube receiving groove concentric to said axis, said groove defining a bend-start point and a center plane perpendicular to the mandrel axis; a hook immovably fixedly associated with said mandrel and defining a recess opening generally parallel to said axis at a position rearwardly of said bend-start point for receiving the tube in a bend-start position and limiting the movement of the tube away from said mandrel rearwardly of the bend-start point and restraining the tube against axial movement in said mandrel groove; shoe means; and means connecting said shoe means to said mandrel for swinging movement of said shoe means about said axis to bend the tube arcuately into said annular groove forwardly from said bendstart point, said connecting means being constructed to space said shoe means away from the mandrel adjacent said bend-start point in a tube loading disposition providing clearance between said shoe
  • said hook further comprises means for limiting the rearward movement of the connecting means to a position wherein said shoe means carried thereby is spaced substantially radially outwardly from said bend-start position.
  • the tube bender of claim 1 including means fixedly securing the hook to the mandrel to open accurately parallel to said axis.
  • said connecting means includes friction holding means for frictionally retaining the shoe means in a plurality of different positions relative to the mandrel.
  • said connecting means comprises a link and pivot means pivotally connecting the link to the mandrel and the link to the shoe means, and said friction holding means comprises spring washers carried by said pivot means.
  • a tube bender comprising: a mandrel having an axis and a segmentally annular, radially outwardly opening tube receiving groove concentric to said axis,
  • said groove defining a bend-start point and a center plane perpendicular to the mandrel axis; a hook fixedly associated with said mandrel and defining a recess opening generally parallel to said axis at a position rearwardly of said bend-start point for receiving the tube in a bend-start position and limiting the movement of the tube away from said mandrel rearwardly of said bendstart point and restrainingthe tube against axial movement in said mandrel groove; shoe means; and means connecting said shoe means to said mandrel for swinging movement of said shoe means about said axis to bend the tube arcuately into said annular groove forwardly from said bend-start point, said connecting means being constructed to space said shoe means away from the mandrel adjacent said bend-start point in a tube loading disposition providing clearance between said shoe means and said mandrel to receive the tube freely therebetween, said mandrel being provided with a recessed portion extending rearwardly from said start point permitting a tube to be bent to be moved

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US87258A 1970-11-05 1970-11-05 Tube bender Expired - Lifetime US3685335A (en)

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US8725870A 1970-11-05 1970-11-05

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788116A (en) * 1971-09-08 1974-01-29 Torrington Co Tailpipe forming mechanism
US3888101A (en) * 1974-01-17 1975-06-10 Silas Ray Crees Cable bender
US3926028A (en) * 1974-08-23 1975-12-16 Imp Eastman Corp Tube bender
FR2498953A1 (fr) * 1981-01-30 1982-08-06 Imp Clevite Inc Cintreuse de tubes
US4580612A (en) * 1984-08-31 1986-04-08 Motor Wheel Corporation Device for mounting and demounting heavy equipment tires from multi-piece wheel rims
US4587824A (en) * 1985-05-22 1986-05-13 Westinghouse Electric Corp. Conductor bundle edge-bending tool for a dynamoelectric generator
US4691555A (en) * 1984-11-15 1987-09-08 Vaughan Donald R Tube bending tool
FR2604931A1 (fr) * 1986-10-14 1988-04-15 Clevite Ind Inc Cintreuse de tubes
US4827755A (en) * 1986-10-14 1989-05-09 Clevite Industries Inc. Manually operable swivel tube bender
US5819581A (en) * 1997-03-07 1998-10-13 Winton, Iii; George R. Mechanism to prevent rotation
USD485152S1 (en) 2003-04-11 2004-01-13 Stride Tool Inc. Pair of tool handles
CN1319667C (zh) * 2002-10-15 2007-06-06 斯特里德工具公司 弯管器和使用它的方法
WO2008051162A1 (en) * 2006-10-26 2008-05-02 Kapman Ab Tool for pipe bending and former for use in such a tool
US20140331812A1 (en) * 2013-05-13 2014-11-13 Aesculap Ag Bent tubular shaft and method for producing the same
CN106001213A (zh) * 2016-06-16 2016-10-12 安徽省恒胜机电工程股份有限公司 一种手持易脱料的弯管器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9156075B2 (en) * 2013-01-25 2015-10-13 Irwin Industrial Tool Company Lever bender and related method of use
NL2014431B1 (en) * 2015-03-10 2016-10-13 Arie Hogerwerf Pieter Device for bending pipes.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1949938A (en) * 1933-07-26 1934-03-06 H P Martin & Sons Pipe bending device
US2986195A (en) * 1956-07-09 1961-05-30 Imp Eastman Corp Tube bending machines
US3190105A (en) * 1962-05-21 1965-06-22 Imp Eastman Corp Tube bender
US3194038A (en) * 1962-03-21 1965-07-13 Ridge Tool Co Tube bender
US3380283A (en) * 1965-01-11 1968-04-30 Parker Hannifin Corp Tube bending tool
US3416345A (en) * 1965-10-24 1968-12-17 Parker Hannifin Corp Hand-held tube bender and bend centering procedure
US3447353A (en) * 1965-11-26 1969-06-03 Emerson Electric Co Tube and rod bender

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2796784A (en) * 1954-10-18 1957-06-25 Imp Brass Mfg Co Tube bender
US2927490A (en) * 1957-05-31 1960-03-08 Parker Hannifin Corp Hand tool tube bender
DE1932465U (de) * 1965-11-26 1966-02-10 Alexander Boehl Biegezange fuer rohre, insbesondere kupferrohre.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1949938A (en) * 1933-07-26 1934-03-06 H P Martin & Sons Pipe bending device
US2986195A (en) * 1956-07-09 1961-05-30 Imp Eastman Corp Tube bending machines
US3194038A (en) * 1962-03-21 1965-07-13 Ridge Tool Co Tube bender
US3190105A (en) * 1962-05-21 1965-06-22 Imp Eastman Corp Tube bender
US3380283A (en) * 1965-01-11 1968-04-30 Parker Hannifin Corp Tube bending tool
US3416345A (en) * 1965-10-24 1968-12-17 Parker Hannifin Corp Hand-held tube bender and bend centering procedure
US3447353A (en) * 1965-11-26 1969-06-03 Emerson Electric Co Tube and rod bender

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788116A (en) * 1971-09-08 1974-01-29 Torrington Co Tailpipe forming mechanism
US3888101A (en) * 1974-01-17 1975-06-10 Silas Ray Crees Cable bender
US3926028A (en) * 1974-08-23 1975-12-16 Imp Eastman Corp Tube bender
FR2498953A1 (fr) * 1981-01-30 1982-08-06 Imp Clevite Inc Cintreuse de tubes
US4580612A (en) * 1984-08-31 1986-04-08 Motor Wheel Corporation Device for mounting and demounting heavy equipment tires from multi-piece wheel rims
US4691555A (en) * 1984-11-15 1987-09-08 Vaughan Donald R Tube bending tool
US4587824A (en) * 1985-05-22 1986-05-13 Westinghouse Electric Corp. Conductor bundle edge-bending tool for a dynamoelectric generator
FR2604931A1 (fr) * 1986-10-14 1988-04-15 Clevite Ind Inc Cintreuse de tubes
DE3734672A1 (de) * 1986-10-14 1988-04-21 Clevite Ind Inc Rohrbiegewerkzeug
US4827755A (en) * 1986-10-14 1989-05-09 Clevite Industries Inc. Manually operable swivel tube bender
US5819581A (en) * 1997-03-07 1998-10-13 Winton, Iii; George R. Mechanism to prevent rotation
CN1319667C (zh) * 2002-10-15 2007-06-06 斯特里德工具公司 弯管器和使用它的方法
USD485152S1 (en) 2003-04-11 2004-01-13 Stride Tool Inc. Pair of tool handles
WO2008051162A1 (en) * 2006-10-26 2008-05-02 Kapman Ab Tool for pipe bending and former for use in such a tool
US20090266137A1 (en) * 2006-10-26 2009-10-29 Kapman Ab Tool for Pipe Bending and Former for Use in Such a Tool
CN101528375B (zh) * 2006-10-26 2011-06-08 卡普曼公司 弯管工具以及在该工具中采用的成形装置
US20140331812A1 (en) * 2013-05-13 2014-11-13 Aesculap Ag Bent tubular shaft and method for producing the same
US10473144B2 (en) * 2013-05-13 2019-11-12 Aesculap Ag Bent tubular shaft and method for producing the same
US11015642B2 (en) 2013-05-13 2021-05-25 Aesculap Ag Bent tubular shaft and method for producing the same
CN106001213A (zh) * 2016-06-16 2016-10-12 安徽省恒胜机电工程股份有限公司 一种手持易脱料的弯管器
CN106001213B (zh) * 2016-06-16 2019-06-04 合肥智权信息科技有限公司 一种手持易脱料的弯管器

Also Published As

Publication number Publication date
DE2139552C2 (de) 1983-09-08
DE2139552A1 (de) 1972-05-10

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Owner name: IMPERIAL CLEVITE INC.,ILLINOIS

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Free format text: MERGER;ASSIGNOR:IMPERIAL CLEVITE INC., A PA. CORP. (MERGED INTO);REEL/FRAME:004600/0610

Effective date: 19860615