FR2511900A1 - Angle and T-iron bending machine - has bending roller supported by linkage operated by nut and screw drive - Google Patents

Angle and T-iron bending machine - has bending roller supported by linkage operated by nut and screw drive Download PDF

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Publication number
FR2511900A1
FR2511900A1 FR8116584A FR8116584A FR2511900A1 FR 2511900 A1 FR2511900 A1 FR 2511900A1 FR 8116584 A FR8116584 A FR 8116584A FR 8116584 A FR8116584 A FR 8116584A FR 2511900 A1 FR2511900 A1 FR 2511900A1
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France
Prior art keywords
axis
lt
gt
roller
arms
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Granted
Application number
FR8116584A
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French (fr)
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FR2511900B1 (en
Inventor
Viktor Nikolaevich Vovchenko
Alexandr Timofeevich Lepilin
Rafail Davidovich Lapsker
Alexei Mikhailovich Vlasov
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EXI KUZNECH
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EXI KUZNECH
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Publication date
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Priority to FR8116584A priority Critical patent/FR2511900B1/en
Publication of FR2511900A1 publication Critical patent/FR2511900A1/en
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Publication of FR2511900B1 publication Critical patent/FR2511900B1/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00Bending rods, profiles, or tubes
    • B21D7/08Bending rods, profiles, or tubes by passing between rollers or through a curved die

Abstract

<P> THE INVENTION CONCERNS METAL WORKING BY DEFORMATION. </P> <P> THE BENDER ACCORDING TO THE INVENTION IS CHARACTERIZED IN PARTICULAR IN THAT THE CONTROL OF MOVEMENT OF THE LED ROLLER IS EXECUTED IN THE FORM OF A MECHANISM THREE ELEMENTS WITH EQUAL ARMS AND FOUR ARTICULATIONS, ONE OF THE SAID 7 ARMS BEING PLACED BETWEEN THE OTHER ARMS 10, 11 AND BEING ARTICULATED THEREWITH AN AXIS 8 AND WITH THE HELP OF ANOTHER AXIS 9, IN CONSTRUCTION 1, THE ARM 10 BEING FURTHER ARTICULATED USING A AXIS 12 HAS TIE RODS 13 FIXED ON THE BEARING RING 14 OF THE SHAFT 4 OF THE ROLLER LEAD 2 IN THE IMMEDIATE NEIGHBORHOOD OF IT , THE ARM 11 BEING CONNECTED BY AN AXIS 15 TO A NUT 16 MOBILE ON A SCREW 17 MOUNTED IN THE FRAME 1 AND CONNECTED TO ITS OWN ROTATION CONTROL 18. </P> <P> THE INVENTION MAY BE USED IN PARTICULAR FOR BENDING PARTS OF DIFFERENT CONFIGURATIONS FROM SYMMETRICAL SECTION PROFILES, ESPECIALLY IN THE CONSTRUCTION OF AIRCRAFT, CHEMICAL AND OIL MACHINES. </P>

Description

 The invention relates to metalworking by deformation and in particular relates to a profile bender.

 The invention can be used in particular for the bending of parts of different configurations from profiles with symmetrical section, in particular in the construction of aircraft, machines of the chemical and petroleum industry, in public works and in construction. agricultural machinery.

 Benders for profiles are known (A, N. Gromov and others> "Manufacture of parts from sheets and profiles in large series", Qboronguiz, N.196O, pp. 68 to 87), comprising a frame in which are mounted shafts on which are arranged bending rollers connected to mechanisms and controls for adjustment and rotation. The number of bending rollers and their arrangement may vary depending on the types and designs of the machines.

The shafts of the bending rollers are mounted in bearings housed in slides or in carriages, and move relative to each other in a line or an arc.

 When bending the profiled blanks, carried out on known machines, rectilinear parts are formed on the ends of the bent parts. To cancel them, additional final bending operations are used. The insufficient tensile force is due to the fact that the bending rollers come into contact with the blank along a line along the generatrices of the bending rollers.

 Therefore, it is impossible to obtain in one pass the minimum radii of curvature of the blank between the bending rollers. Bending must be carried out in several passes, which significantly reduces the efficiency of known machines.

 The outer surfaces of the bent parts are damaged when sliding in places where they come into contact with the bending rollers.

 There is also known a bender for -profiles (Great Britain invention patent n0119O884 of May 6, 1970, cl. B 3) comprising a b ti in which are mounted shafts on which are cantilevered a driven roller and a driving roller provided with an elastic coating.

The rollers are rigidly fixed on trees. The driven roller is provided with a control which moves it towards the axis of the driving roller, also provided with its own control which sets it in rotation. The driven roller shaft rests on bearings housed in a cage of a pivoting lever connected to a rotation control. The roller with the elastic coating is fixed on the shaft resting on bearings in a cage fixed in the bats, and is connected via
from a chain transmission and a reduction gear to a rotation control. This known bender comprises a mechanism for adjusting the pivot angle of the lever carrying the driven roller.

 The arrangement of the bearing bearings of the driven roller shafts and leading into a rigid body leads to a noticeable increase in their size, since it is necessary to compensate, in this case, the load of the overhang reaching a considerable value. and acting on the rollers during bending. The large dimensions of the bodies limit the value of the approximation of the driven and driving rollers, which consequently limits the minimum radii of curvature determined by the value at which the driven roller with the blank sinks into the elastic coating of the roller led. As a result, the technological possibilities of the bender making it possible to obtain the smallest radii of curvature of the parts using this bender are also limited. It is not possible to adjust the pivot angle of the lever carrying the driven roller characterizing its insertion into the elastic coating, and consequently, the radius of curvature obtained, only after having put the lever in the starting position This further limits the technological possibilities of the bender, since it is impossible to produce parts with variable curvature using it.

 It has therefore been proposed to develop a bending machine for profiles in which the design of the mechanisms moving the driven and driving rollers would make it possible to widen the technological possibilities of the bending machine for profiles ensuring the reduction of the minimum radii of curvature of the parts and the 'obtaining the possibility of bending parts with variable curvature.

 This problem is solved using a bending machine for profiles comprising: a frame, a driven roller and a driving roller provided with an elastic coating, mounted in cantilever and rigidly fixed on shafts; a drive roller rotation control; a movement control of the driven roller towards the axis of the driving roller, characterized, according to the invention, in that the movement control of the driven roller is executed in the form of a mechanism with three elements with equal arms and with four articulations ; an arm is disposed between the second and the third arm and is articulated to them by means of an axis, and by means of another axis, to said frame, said second arm is articulated by means of an axis to tie rods fixed to a bearing ring of the roller shaft led in the immediate vicinity thereof, while said third arm is linked by an axis to a nut coupled to a screw mounted in the frame and connected to a control of rotation, the shafts of the two rollers being connected together by two pivoting levers having a common axis of rotation parallel to the axes of said shafts.

 The invention makes it possible to reduce the loads acting on the bearings of the driven and driving shafts and thus to reduce the size of all the construction elements of the shafts and of the driving roller which determines the lowest value of the radius of curvature obtained. The movement command of the driven roller, comprising a screw-nut couple, constantly linked to the driven roller by means of a mechanism made up of three elements with equal arms and with four articulations and tie rods, makes it possible to achieve a picked up design of the machine and gives the possibility of adjusting the value of the driving of the driven roller in the elastic coating during the bending of the parts; in other words, it is now possible to produce parts with variable curvature.

 The invention will be better understood and other objects, details and advantages thereof will appear better in the light of the explanatory description which follows of an embodiment given solely by way of nonlimiting example, with references to single non-limiting drawing attached representing the kinematic chain of the bender according to the invention.

The profile bender has a frame 1, a driven roller 2 and a driving roller 3 provided with an elastic coating, which rollers are cantilevered and rigidly fixed on shafts 4,5, respectively. for profiles comprises a command for moving the driven roller 2 towards the axis of the driving roller 3. The driving roller 3 is provided with a rotation control 6,
The movement command of the driven roller 2 is executed in the form of a mechanism with three elements with equal arms and with four articulations, an arm 7 of which is articulated by means of an axis 8 to b ti 1, and of an axis 9 to the arms 10 and 11. The arm 10 is articulated by means of an axis 12 with tie rods 13 fixed on a bearing ring 14 of the shaft 4, in the immediate vicinity of the roller 2. With the aid of the axis 15, the arm It is articulated to a nut 16 linked to the screw 17 mounted in the frame 1 and connected to a rotation control 18.

 The shafts 4,5 of the rollers 2,3 are connected to each other by two pivoting levers 19, 20 having a common axis of rotation 21 arranged parallel to the axes of the shafts 4,5. use bending blank 22 is placed between the rollers 2,3.

 The bender operates as follows.

 The blank 22 of the part to be obtained is placed between the rollers 2,3 in a prescribed position. The control 18 is put into action, which rotates the screw 17. Moving along the screw 17, the nut 16 pivots the mobile arms 11, 10 and 7 of the mechanism with three elements with equal arms and four articulations, and these lower the shaft 4 of the driven roller 2 using the tie rods 13. During its descent, the driven roller 2 sinks with the blank 22 into the elastic coating of the driving roller 3 to a depth data determining the required radius of curvature of the part. The levers 19, 20 connecting the shafts 4,5 of the rollers 2,3 rotate around their axes of rotation ensuring the parallel displacement of the shaft 4 of the driven roller 2 relative to the shaft 5 of the drive roller 3 along the entire path of movement of the part, independently of the forces created in the rollers 2, 3. Then the rotation control 6 of the shaft 5 of the drive roller 3 comes into action and the 'blank 22 of the part is driven between the rollers 2,3, bending according to the desired radius. By controlling the movement of the roller 2 during the shaping of the blank 22, it is possible to obtain a part with variable curvature. Once the work is complete, the movement control 18 of the roller 2 is engaged for the work in the opposite direction and the movement mechanism lifts the driven roller 2 by releasing the finished part.

 Thus, the use of the pivot levers 19, 20 ensures, first of all, the reduction of the load acting on the bearings of the shafts 4,5, which makes it possible to reduce their size and the diameter of the driven roller, by ensuring, in this way, the possibility of obtaining minimum radii of curvature of the parts; secondly, it ensures the parallelism of the axes of the shafts 4, 5. This makes it possible to raise the quality of the parts produced.

The possibility of controlling the movement of the driven roller 2 during the bending of the blank makes it possible to produce parts with variable curvature. All these advantages contribute to widening the technological possibilities of the bender,

Claims (1)

  1.  R E V E N D I C A T I O N
     Profile bending machine, of the type comprising: a frame (1); a driven roller (2) and a driving roller (3) provided with an elastic coating, said dBnt maffs rollers in cantilever and rigidly fixed on shafts (4,5) a movement control of the driven roller (2 ) towards the axis of the driving roller (3) provided with its own rotation control (6), characterized in that the movement control of the driven roller is executed in the form of a mechanism with three elements with equal arms and four joints, one (7) of said arms being disposed between the other arms (10,11) and being articulated to these by means of an axis (8) and by means of another axis (9) , to the frame (1d, the arm (10) being further articulated by means of an axis (12) to tie rods (13) fixed on the bearing ring (14) of the shaft (4) of the roller led (2) in the immediate vicinity thereof, the arm (11) being connected by an axis (screw) to a nut (16) movable on a screw (17) mounted in the frame (1) and connected to its own rotation control (18), the shafts (4,5) of said two rollers being interconnected by s pivoting levers (19,20) with common axis of rotation (21) arranged parallel to the axes of the shafts (4,5).
FR8116584A 1981-08-31 1981-08-31 Profile bender Expired FR2511900B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8116584A FR2511900B1 (en) 1981-08-31 1981-08-31 Profile bender

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8116584A FR2511900B1 (en) 1981-08-31 1981-08-31 Profile bender

Publications (2)

Publication Number Publication Date
FR2511900A1 true FR2511900A1 (en) 1983-03-04
FR2511900B1 FR2511900B1 (en) 1985-08-30

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Family Applications (1)

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FR8116584A Expired FR2511900B1 (en) 1981-08-31 1981-08-31 Profile bender

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FR (1) FR2511900B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4688414A (en) * 1984-07-13 1987-08-25 Mugica Marcos O Production procedure of brake shoes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1503082A (en) * 1965-12-09 1967-11-24 Kaufmann Tool And Engineering Machine with two rolls for bending sheets
FR1560764A (en) * 1967-03-21 1969-03-21
FR2082357A7 (en) * 1970-03-11 1971-12-10 Rabut Marcel
US3628360A (en) * 1970-01-21 1971-12-21 Niagara Machine & Tool Works Roll forming machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1503082A (en) * 1965-12-09 1967-11-24 Kaufmann Tool And Engineering Machine with two rolls for bending sheets
FR1560764A (en) * 1967-03-21 1969-03-21
US3628360A (en) * 1970-01-21 1971-12-21 Niagara Machine & Tool Works Roll forming machine
FR2082357A7 (en) * 1970-03-11 1971-12-10 Rabut Marcel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4688414A (en) * 1984-07-13 1987-08-25 Mugica Marcos O Production procedure of brake shoes

Also Published As

Publication number Publication date
FR2511900B1 (en) 1985-08-30

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