GB2120963A - Procedure and means for bending metal sections - Google Patents

Procedure and means for bending metal sections Download PDF

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Publication number
GB2120963A
GB2120963A GB08315048A GB8315048A GB2120963A GB 2120963 A GB2120963 A GB 2120963A GB 08315048 A GB08315048 A GB 08315048A GB 8315048 A GB8315048 A GB 8315048A GB 2120963 A GB2120963 A GB 2120963A
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GB
United Kingdom
Prior art keywords
section
bending
jaw
bent
procedure
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.)
Granted
Application number
GB08315048A
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GB8315048D0 (en
GB2120963B (en
Inventor
Ilmari Patrikainen
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Individual
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Individual
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Publication date
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Publication of GB8315048D0 publication Critical patent/GB8315048D0/en
Publication of GB2120963A publication Critical patent/GB2120963A/en
Application granted granted Critical
Publication of GB2120963B publication Critical patent/GB2120963B/en
Expired 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
    • 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
    • B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
    • 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
    • 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
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Ceramic Products (AREA)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)

Abstract

In bending metallic section material, such as flat bar iron, into circular shape, such as that of a flange or a conveyor screw, the section (1) is fed with lateral guiding forward periodically and it is bent one part at a time between two jaws (8,9) located above the section and below it. It is possible with the aid of the invention with low expenditure and with high bending moments to bend metal sections of even very great thickness in cross-section. <IMAGE>

Description

SPECIFICATION Procedure and means for bending metal sections The present invention concerns a procedure for bending metal section material, such as flat bar iron, into circular shape, such as that of a flange or a conveyor screw. A procedure of similar kind has been disclosed for instance in U.S. Patent No.
4,302,959, in which spring steel is wound about an axle into spring shape. It is also known in the art to wind sections into circular shape with a mangle where the section feed rate is constant. The object of the invention is to provide a new type of procedure by which with low power are bent metal sections with large cross section area. The procedure of the invention is characterized in that the section is fed with lateral guidance periodicallyfoward and bent one part at a time between two jaws located above the section and below it. It is thus possible with the aid of the invention with low power and high bending moment on the jaw to turn the part of the section to be bent, in its turn, to desired shape.
An advantageous embodiment of the invention is characterized in that the feeding and bending of the section are accomplished with hydraulic cylinders, the synchronizing movements between these being performed with hydraulic systems known in the art.
Therefore all feeding and bending motions can be automated and they need not be separately controlled. Another embodiment of the invention is characterized in that the sections are fed forward by means of a feed cylinder and a clamping member on the moving end of the latter, whereafter the section is bent with a bending cylinder and a bending jaw coupled on its moving end against a counter-jaw on the opposite side of the section.
The invention also concerns a means for carrying out a procedure according to the invention. The means of the invention is characterized in that it consists of a hydraulic cylinder feeding the section and a clamping member on the moving end thereof, of a section braking latch in its connection affixed to the frame, of a bending cylinder having a bending jaw pivotally mounted between its moving end and the frame, and of a counter-jaw on the opposite side of the section, against which the section is bent, and of lateral guides bracing the section in lateral direction. A means of this kind is exceedingly simple and therefore economical to manufacture. Tests have shown that it is possible with the aid of a small electric motor of a few kilowatts to bend flat iron bars into the shape of a flange where the cross section of the bar iron is up to 100 m by 20 mm.One embodiment of the invention is characterized in that the means comprises a conveyor screw pitch table which is hydraulically controllable to turn to give the screw the correct predetermined pitch. Therefore one achieves with one single additional motion conveyor screws of which the size and pitch is changeable with ease.
The invention is described in the following with the aid of an example with reference made to the attached drawing, wherein Figure 1 presents the means in elevational view. Figure 2 shows the same means, seen from the direction of the entering material.
The means consists of a hydraulic cylinder 2 feeding the section 1 and of a clamping member 3 on the moving end thereof. In connection therewith is provided a section-braking latch 5 attached to the frame 4 of the means. To the frame 4 of the means has been fixed a bending cylinder 6, between its moving end 7 and the frame 4 having been pivotally mounted a bending jaw 8, and on the opposite side of the section 1 is provided an axle-shaped counterjaw 9, against which section will be bent. The frame 4 consists of two plates which constitute the lateral guides bracing the section in lateral direction. The means comprises a conveyor screw pitch table 10, controllable with the aid of a hydraulic cylinder 11 to turn the screw to have the correct predetermined pitch.
The section 1 is inserted in the means, in Figure 1 from the upper right so that the end of the section passes through the clamping member 3 and past the braking latch 5 to the point between the bending jaw 8 and the counter-jaw 9: When the bending jaw 8 is now raised upward with the aid of the-hydraulic cylinder 6 as indicated by the arrow 12, the end of the section will be bent one bending step. The bending jaw is returned to its lower position and the feeding hydraulic cylinder 2 is used to advance the section one step, whereafter the second bending operation is performed with the bending cylinder 6.
During the bending, the braking latch 5 holds the section immovable by its wrenching action. In this way a circular ring is formed of the section, one step at a time. If furthermore the pitch table 10 is used, which belongs to the means and-which likewise one step at a time bends the section to obtain a pitch, one obtains a helical screw. For instance, for gravel transporting a conveyor screw is needed which has been made of thick enough material and is rigid enough because the material to be transported is heavy and exerts an abrasive effect on the screw.
It is obvious to a person skilled in the art that different embodiments of the invention may vary within the scope of the claims following below.
For instance, the length of the step which is bent at any one time may vary, but most properly it is only a few degrees of arc, e.g. 2 to 40
CLAIMS 1. Procedure for bending metal sections, such as flat bar iron, to circular shape, such as that of a flange or a conveyor screw, characterized in that the section is fed with lateral guiding forward periodically and is bent one part at a time between two jaws which are located above the profile and below it.
2. Procedure according to claim 1, characterized in that the feeding and bending of the section are carried out with hydraulic cylinders, the synchronizing motions between these being carried out with hydraulic systems known in themselves in the art.
3. Procedure according to claim 1, characterized in that the section is fed forward with a feed cylinder and with a clamping member on the end thereof, whereupon the section is bent with a bending
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Procedure and means for bending metal sections The present invention concerns a procedure for bending metal section material, such as flat bar iron, into circular shape, such as that of a flange or a conveyor screw. A procedure of similar kind has been disclosed for instance in U.S. Patent No. 4,302,959, in which spring steel is wound about an axle into spring shape. It is also known in the art to wind sections into circular shape with a mangle where the section feed rate is constant. The object of the invention is to provide a new type of procedure by which with low power are bent metal sections with large cross section area. The procedure of the invention is characterized in that the section is fed with lateral guidance periodicallyfoward and bent one part at a time between two jaws located above the section and below it. It is thus possible with the aid of the invention with low power and high bending moment on the jaw to turn the part of the section to be bent, in its turn, to desired shape. An advantageous embodiment of the invention is characterized in that the feeding and bending of the section are accomplished with hydraulic cylinders, the synchronizing movements between these being performed with hydraulic systems known in the art. Therefore all feeding and bending motions can be automated and they need not be separately controlled. Another embodiment of the invention is characterized in that the sections are fed forward by means of a feed cylinder and a clamping member on the moving end of the latter, whereafter the section is bent with a bending cylinder and a bending jaw coupled on its moving end against a counter-jaw on the opposite side of the section. The invention also concerns a means for carrying out a procedure according to the invention. The means of the invention is characterized in that it consists of a hydraulic cylinder feeding the section and a clamping member on the moving end thereof, of a section braking latch in its connection affixed to the frame, of a bending cylinder having a bending jaw pivotally mounted between its moving end and the frame, and of a counter-jaw on the opposite side of the section, against which the section is bent, and of lateral guides bracing the section in lateral direction. A means of this kind is exceedingly simple and therefore economical to manufacture. Tests have shown that it is possible with the aid of a small electric motor of a few kilowatts to bend flat iron bars into the shape of a flange where the cross section of the bar iron is up to 100 m by 20 mm.One embodiment of the invention is characterized in that the means comprises a conveyor screw pitch table which is hydraulically controllable to turn to give the screw the correct predetermined pitch. Therefore one achieves with one single additional motion conveyor screws of which the size and pitch is changeable with ease. The invention is described in the following with the aid of an example with reference made to the attached drawing, wherein Figure 1 presents the means in elevational view. Figure 2 shows the same means, seen from the direction of the entering material. The means consists of a hydraulic cylinder 2 feeding the section 1 and of a clamping member 3 on the moving end thereof. In connection therewith is provided a section-braking latch 5 attached to the frame 4 of the means. To the frame 4 of the means has been fixed a bending cylinder 6, between its moving end 7 and the frame 4 having been pivotally mounted a bending jaw 8, and on the opposite side of the section 1 is provided an axle-shaped counterjaw 9, against which section will be bent. The frame 4 consists of two plates which constitute the lateral guides bracing the section in lateral direction. The means comprises a conveyor screw pitch table 10, controllable with the aid of a hydraulic cylinder 11 to turn the screw to have the correct predetermined pitch. The section 1 is inserted in the means, in Figure 1 from the upper right so that the end of the section passes through the clamping member 3 and past the braking latch 5 to the point between the bending jaw 8 and the counter-jaw 9: When the bending jaw 8 is now raised upward with the aid of the-hydraulic cylinder 6 as indicated by the arrow 12, the end of the section will be bent one bending step. The bending jaw is returned to its lower position and the feeding hydraulic cylinder 2 is used to advance the section one step, whereafter the second bending operation is performed with the bending cylinder 6. During the bending, the braking latch 5 holds the section immovable by its wrenching action. In this way a circular ring is formed of the section, one step at a time. If furthermore the pitch table 10 is used, which belongs to the means and-which likewise one step at a time bends the section to obtain a pitch, one obtains a helical screw. For instance, for gravel transporting a conveyor screw is needed which has been made of thick enough material and is rigid enough because the material to be transported is heavy and exerts an abrasive effect on the screw. It is obvious to a person skilled in the art that different embodiments of the invention may vary within the scope of the claims following below. For instance, the length of the step which is bent at any one time may vary, but most properly it is only a few degrees of arc, e.g. 2 to 40 CLAIMS
1. Procedure for bending metal sections, such as flat bar iron, to circular shape, such as that of a flange or a conveyor screw, characterized in that the section is fed with lateral guiding forward periodically and is bent one part at a time between two jaws which are located above the profile and below it.
2. Procedure according to claim 1, characterized in that the feeding and bending of the section are carried out with hydraulic cylinders, the synchronizing motions between these being carried out with hydraulic systems known in themselves in the art.
3. Procedure according to claim 1, characterized in that the section is fed forward with a feed cylinder and with a clamping member on the end thereof, whereupon the section is bent with a bending cylinder and with a bending jaw coupled with the moving end thereof against a counter-jaw on the opposite side of the section.
4. Means for carrying out a procedure according to claim 1, characterized in that the means consists of a hydraulic cylinder (2) feeding the section (1) and of a clamping member (3) on the moving end thereof, of a section braking latch (5) in connection thereof, affixed to the frame (4) of the means, of a bending cylinder with a bending jaw (8) pivotally mounted between its moving end and the frame, and of a counter-jaw (9) on the opposite side of the section, against which the section will be bent, and of lateral guides bracing the section in lateral direction.
5. Means according to claim 4, characterized in that the means comprises a pitch table (10) for the helix of a conveyor screw, controllable by a hydraulic cylinder (11) to turn the screw to be given the correct predetermined pitch.
6. A process for bending strip material substantially as herein described with reference to the accompanying drawings.
7. Apparatus for bending strip material substantially as herein described with reference to the accompanying drawings.
GB08315048A 1982-06-03 1983-06-01 Procedure and means for bending metal sections Expired GB2120963B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI821973A FI77996C (en) 1982-06-03 1982-06-03 Method and apparatus for bending metal profiles

Publications (3)

Publication Number Publication Date
GB8315048D0 GB8315048D0 (en) 1983-07-06
GB2120963A true GB2120963A (en) 1983-12-14
GB2120963B GB2120963B (en) 1986-05-29

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GB08315048A Expired GB2120963B (en) 1982-06-03 1983-06-01 Procedure and means for bending metal sections

Country Status (8)

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CH (1) CH659597A5 (en)
DE (1) DE3321379A1 (en)
DK (1) DK162262C (en)
FI (1) FI77996C (en)
FR (1) FR2527950B1 (en)
GB (1) GB2120963B (en)
NO (1) NO166764C (en)
SE (1) SE461446B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB254066A (en) * 1925-05-20 1926-07-01 Hugo Junkers Improvements in and relating to the manufacture of sheet metal pipes
GB791046A (en) * 1955-03-07 1958-02-19 Cie De Pont A Mousson Improvements in and relating to a machine for helically winding metal sheets or plates in particular for producing tubes
GB874641A (en) * 1958-12-11 1961-08-10 Reuss Bergbau Und Industriebed Making pipes
GB1356614A (en) * 1970-05-21 1974-06-12 Sealed Power Corp Machines for forming metallic strip stock into rings

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1834C (en) * FR. HOPPE, Hofschlosser, in Stuttgart Bending device for gutter supports
US1878233A (en) * 1929-10-29 1932-09-20 Griscom Russell Co Coiling machine and method of winding coils
DE832232C (en) * 1950-04-12 1952-02-21 Dolberg A G R Device for bending mandrels encircling eyes at the ends of straight or curved profile steels
DE1806841U (en) * 1959-06-02 1960-02-25 Helmut Beltle BENDING DEVICE FOR THE PRODUCTION OF RAILS FOR GUTTERS.
FR1285430A (en) * 1961-01-12 1962-02-23 Improvements in the manufacture of springs
US4302959A (en) * 1977-11-29 1981-12-01 Yakovlev Vladimir K Method of forming helical springs
GB2057316A (en) * 1979-08-31 1981-04-01 Ti Reynolds Ltd Bending sections
US4430872A (en) * 1980-02-14 1984-02-14 Nippon Kokan Kabushiki Kaisha Method and apparatus for plate edge preparation for UOE pipe making process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB254066A (en) * 1925-05-20 1926-07-01 Hugo Junkers Improvements in and relating to the manufacture of sheet metal pipes
GB791046A (en) * 1955-03-07 1958-02-19 Cie De Pont A Mousson Improvements in and relating to a machine for helically winding metal sheets or plates in particular for producing tubes
GB874641A (en) * 1958-12-11 1961-08-10 Reuss Bergbau Und Industriebed Making pipes
GB1356614A (en) * 1970-05-21 1974-06-12 Sealed Power Corp Machines for forming metallic strip stock into rings

Also Published As

Publication number Publication date
SE461446B (en) 1990-02-19
DE3321379A1 (en) 1984-12-20
NO831990L (en) 1983-12-05
SE8303122D0 (en) 1983-06-02
DK162262B (en) 1991-10-07
GB8315048D0 (en) 1983-07-06
DK249383A (en) 1983-12-04
GB2120963B (en) 1986-05-29
FR2527950A1 (en) 1983-12-09
FR2527950B1 (en) 1989-08-25
FI77996C (en) 1989-06-12
NO166764B (en) 1991-05-27
FI77996B (en) 1989-02-28
SE8303122L (en) 1983-12-04
NO166764C (en) 1991-09-04
DK162262C (en) 1992-03-16
CH659597A5 (en) 1987-02-13
FI821973L (en) 1983-12-04
FI821973A0 (en) 1982-06-03
DK249383D0 (en) 1983-06-02

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PE20 Patent expired after termination of 20 years