JPS61140326A - Two roller-sheet bending machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the application of pressure to process metal and metal materials, and more particularly to a 20-rule, sheet or plate bending machine.

The present invention can be most effectively used for bending sheet or plate metal material into tubular parts used in aircraft, automotive industry, and chemical engineering.

Additionally, it is used in bending various parts of permanent structures, such as shades, reflective materials.

In the construction of various parts and products in the aviation and engineering industries, a large proportion of the tubular parts made of aluminum, titanium alloys, corrosion-resistant steel sheets or plates have a diameter of 60 to 200 mm. Under the conditions of producing a wide variety of products in small quantities, current manufacturing techniques are labor intensive and have a length to diameter ratio of greater than 10:1. It is characterized by the fact that it requires a considerable amount of finishing work.

When bending cylindrical parts and cylindrical products from sheet or plate material, adequate precision is ensured by compound bending techniques, in which the parts to be bent by means of pressurized loads acquire the shape of the forming tool. This O-bending technique is preferably accomplished by a 20-La bending machine, but a 20-La bending machine is suitable for 30 to 1
By using a 50mm straight molded cola, (
(for elastic unwinding of the material after bending) for bending cylindrical parts with diameters in the above range (60 to 200 mm); 0; frame with upright members, mechanically connected to the upright members; a replaceable forming roller having a rigid peripheral surface and a roller having an elastic cover attached to an upright member, the roller having the elastic cover being used for forming and bending the sheet material against the roller. Such a 20-ra bending machine is known (U.S. Pat. No. 3,371,513, Part II), which is of suitable construction and is connected to a rotary drive source and a mechanism for radial displacement. .

In this prior art machine, the replaceable forming roller is a tubular roller with a hard peripheral surface, which is mounted with a gap in a sleeve supported symmetrically by two self-extending bearings on the shaft VC. . This shaft was inserted at one end into an opening provided in one of the upright members of the frame body, and was press-fitted into the opposite upright member for rotation.

The other end is received in a pivot support having a shaft. The self-centering bearing is arranged with respect to the end surface of the sleeve, and the maximum deflection or bending of one end portion of the cantilever is substantially the same as the sleeve overall length DI & large deflection or bending between the bearings. In this way,
Maximum deflection for a given load is minimized.

This construction of a forming roller with a sleeve is a straight-fitting roller over 90 mm, with a length-to-diameter ratio of 10.
: Implemented for less than 1. For smaller diameters, the forming roller in the machine under discussion is made solid and mounted on two bearings, but the α-roller has a lower stiffness and its length is substantially shorter.

Another drawback of this machine is that it takes a considerable amount of time to remove the warped material from the bent VKK roll.

For removal, apart from removing the roller with the elastic cover and stopping its rotation, one of the supports of the forming roller must be removed.
It is necessary to rotate and clear one. Only in this way can the bent material be removed.

Therefore, the known configuration of a 20-inch machine with two-bearing forming rollers is suitable for forming cylindrical products and parts from titanium alloy, high-strength aluminum alloy sheet or plate materials, with a length to diameter ratio of 10:1. This method is insufficient in that it does not require the use of overlapping forming rollers.

The object of the present invention is to bend cylindrical parts and cylindrical products from sheet materials made of titanium alloys, aluminum alloys, and corrosion-resistant steel, with a forming roller length and diameter ratio of 10:1.
In addition, the rigidity f of a forming roller with a diameter of 30 mm or more is approximately 11%. It is about making.

This purpose includes a frame with an upright member, a replaceable forming roller mechanically connected to the upright member and having a hard peripheral surface, a roller with an elastic cover attached to the upright member, and a roller with an elastic cover attached to the upright member. A two-roller sheet bending roller having a configuration adapted for bending sheet material relative to the forming roller and coupled to a rotary drive source and a mechanism for directional displacement. The machine further comprises: a frame; a cross member supporting at least one wall or web supporting a support which is attached to the upright member and engages the forming rollers during the bending operation; This wall is accomplished by a two-roller sheet bending machine fitted at each end with a device for holding forming rollers for operation that removes the bent material.

A machine equipped with a crosspiece with walls or webs makes it possible to attach to it a sufficient number of supports to give a suitable stiffness to a forming roller VC with a diameter of more than 30 mfrL. Moreover, the support is of a configuration that allows the support to fit within the contour line defined by the minimum internal diameter of the bent product due to elastic curling or elongation of the product. By making the thin wall or web also O, half of the circumference O of the product 0 circle can be bent in one bending process. In the second process, the circular shape of the product is completed. The forming roller is pressed against the support by the action of the load required for bending. When this load is released, the forming roller holder O separates from the supporting member due to its own weight and is held against the wall member 0 by devices located at both ends of the wall member 0.

This arrangement of the forming rollers in D-sheet bending machines allows the material to be quickly removed after bending, since it is no longer necessary to release the forming rollers from the support; By moving it along, the material can be easily removed from the machine.

This mechanical support is in the form of support rollers arranged in two rows parallel to the generatrix of the forming roller, and at the point where the rollers engage with the forming roller, It is desirable that the value is not 140 or more.

Experiments and research have proven that the shape of the support roller minimizes the loss of force required to overcome the frictional force when the forming roller rotates. By arranging them in two rows, adequate stability of the forming rollers was obtained.

The support in the shape of the support roller can be placed along the entire generatrix of the forming roller ◎ This arrangement is advantageous due to the linear load applied to the forming roller, the force applied to the support, and
Determined by the allowable deflection of the forming rollers. Research has shown that in most cases of bending tubular parts or products, strict requirements are placed on the length of the end section where the bend is too small; It has proven necessary to arrange the support over the entire generatrix of the roller.

Advantageously, the machine is equipped with a mechanism for removing several support rollers from around the forming roller, and this mechanism includes a hydraulic cylinder connected to the rollers via a rod.

This feature is that when bending thin-walled tubular products, the end bends are performed with great force, and support rollers are required along the generatrix of the forming rollers, while the external shape of the product is substantially reduced. It is important in such cases that smaller linear loads can be carried out and some rollers can be removed from engagement with the forming rollers. In this way (if the length of the area from which the roll is removed is equal to or greater than the length of the product to be bent, the bending operation can be carried out in a D-step or a pressurization.

In this way, the productivity of the bending operation is improved.

One end of each device that holds the forming roller is attached to the wall so that it can be displaced in the axial direction, and the other end is the forming roller ■End face! 7
) IIIK receiver is preferably equipped with a stud needle that can be inserted into the molding device. With such a configuration, when the shape or dimensions of the product to be bent changes, the molding opening can be quickly adjusted. Can be removed and installed. The advantage of this configuration is that if the walls of the forming roller grooves are made of the same thickness, there is no need to reposition the housing of this device when changing the forming roller O, even if the rollers are different. That's what I say.

This machine is equipped with a mechanism for adjusting and displacing the roller with an elastic cover with respect to the wall during the continuous operation of adjusting the machine to the forming rollers of different favorites. Preferably, it is operatively coupled to a radial displacement mechanism.

By incorporating the qB2-displacement mechanism, it is necessary to position the roller at the A zero entry position each time, i.e., when first going through the step of contacting the forming roller and the roller with the elastic cover. By providing the adjustment/V-position mechanism, it is possible to determine the desired position of the roller with the elastic cover relative to the wall when replacing the forming roller, even if the forming roller is not there.

A mechanism that adjusts and displaces a roller with an elastic cover is
including a ruler attached to the frame and a flexible band operatively coupled to a radial displacement mechanism of the roller having an elastic cover, the ruler responsive to radial displacement of the roller having an elastic cover. It is convenient for the band to have a scale corresponding to each of the forming rollers. Although this arrangement is quite simple, the information regarding the penetration of the forming roller into the elastic cover is easily readable and obvious.

The invention will be further explained on the basis of embodiments thereof with reference to the accompanying drawings.

Invention 7:12 A roller sheet or plate bending machine is provided with a frame 1 (FIG. 1) of box structure, with upright members 2.3 fixed to both ends of the frame 10, and a horizontal tie between them. 4
are connected. The machine further includes a replaceable forming roller 5 having a rigid peripheral surface 6 and mechanically connected to the upright member 2.3 in a rotatable manner. The upright members 2.3 have a hole 7.8 formed in each of them for a shaft 9, the shaft 9 having a left-hand jaw 10 and a right-hand jaw 11 for rotatably spacing a roller 12 with an elastic cover 13. A supporting roller 12 with an elastic cover 13 is used for bending a sheet or plate blank 14 (FIG. 2) against a forming roller 5 and has a metal core 15.
1, on which a ring 16 made of elastic material, such as boron tan, is fitted. Twelve rollers with elastic covers 13 are connected to a rotary drive source 17 (FIG. 1), for example a hydraulic motor, mounted on the right jaw 11, and also a machine for half-ball direction O displacement! It is linked to $118. The half-ball displacement mechanism 18 is a hydraulic cylinder 19.200 shaped Q4 mounted on a bracket 23.24 fixed on the frame 1 with the aid of a respective pivoting stand 21.22. Hydraulic cylinder 1
9.20 respectively D piston φ rod 25.26 is,
Jaw 10.11 ■ Corresponding x a y to 2 g, 3
0 and each pivot stud 31.3
It has projections 27, 28 connected by 2fC.

According to the invention, the θ machine further comprises a cross member 3 attached to the upright member 2.3 and supporting the tube or web 34.
3 m, and a support 35 is attached to this wall 34, which is aligned with the forming roller. At both ends of this wall body 34, devices 36 and 37 are attached for lining the forming roller 5 when removing or discharging the bent material 14.

The crosspiece 33 is a rigid beam having at each end support members 38, 39 which are respectively received in the upright members 2.3. Furthermore, the crosspiece 33 has flanges 40, 41, which Openings 42.4311 respectively provided in:
■ is also O in order to fix the position of the cross member 330. This fixation is effected by means of tapered pins 44.45D which are respectively received in the openings 42.43 of the seven flange 40, 410 and are respectively attached to the handle arm 46.47. Furthermore, it has 33 cross members, 20 pieces, and 48 pieces (Fig. 2). The upper part of the W body web 34 is received therein, and the bottom part of the wall 34 is a support 35 for the forming roller 5D: ii! It has an extension part 49 that meets the requirements.

In the embodiment described here, the supports 35 for the forming rollers 5 are arranged in two parallel rows on the forming roller 5θ generatrix and are supported on the wall 34'Z) extension 49. This is the shape of a multiple O support roller 50 (Fig. 3) attached to a shaft 51. Roller 50 is adapted to engage forming roller 5 during operation. Material 1
In order to maintain forming roller 5 permanently engaged with roller 50 when operating under pressure that bends 4,
The angle α formed by the tangent line drawn around the point where each row of rollers 50 is engaged with the surface 6 of the forming roller 50 is 14
There is no way it will exceed 0. This means that roller 50 ■ center distance ■ distance % 1 /I and coloring roller 5 ■ straight to dI
This can be maintained by appropriately selecting the material to accommodate the direct placement of the material to be bent. The angle α■minimum straightness is limited by the maximum allowable load of the rollers 50.

Thickness from 0.5 to 3 mm■ For bending sheet or plate metal materials, high strength metals, alloy materials, etc.
As shown in Figure 1, the roller 50 is provided across the entire generating line of the forming roller 5D.

Several rollers 50 are used from enclosure 6 to bend relatively short materials of thin sheet metal material with a thickness of 0.5 mm t, and relatively short materials of relatively soft metals and alloys in one process. Contains a machine 11152 for removing peeks,
This is equipped with a hydraulic cylinder 53, a hydraulic cylinder 5
3) The piston and rod 54 are connected to the roller 5 to be removed via the rod 55, bracket 56, and support member 57.
Connected to 0. The bracket 56 is a support member 57
The support member 57Fi has a shape corresponding to the wall 34, and the receiver is placed in a cutout 58D formed in the center of the support member 57Fi. Cut out! 58
defines a respective projection 59 which is received in a slot 60 of the support member 57'7). Support member 5
7 is connected to the wall 34 by a shaft 61. The main body 62 of the hydraulic cylinder 53 is attached to the cross member 33 by means of a bracket 63.

According to the invention, at the end of the wall 34 a device 36,37 for holding the forming roller 5 is mounted (FIG. 1).

As shown in FIG. 5, the device 36 includes a bracket 64 attached to the end face of the wall 34;
The stud 65 includes a stud 65 whose one end is received in the blind hole 66 and is movable in the axial direction.
The end of the pond 5 is adapted to be received in the annular groove 67 of the coloring roller 5.

In the operating position, the stud 65 is attached to the bracket 64
The forming roller 5 is press-fitted into the groove 67 by a compression spring 68 which is fitted into the blind hole 66 and whose one end is in contact with the bottom of the blind hole 66 and whose curved end is in contact with the stud 65. has been done.

In order to retract the stud 65 for the purpose of replacing the forming roller 5, the retaining device 37 of the reservoir is likewise connected with a knob 69 to the stud 65 in the bracket 64 through a through hole 70 provided in the platen 64. In order to adjust the mechanism to forming rollers 5 of different diameters (not shown in FIG. 5), the machine according to the present invention has an elastic cover against the wall 34. The mechanism 71 (Fig. 'A6) adjusts and displaces the roller 12 (Fig. 1) having the elastic cover 13, and the mechanism 71 (Fig. are combined. In FIG. 6, a part of this mechanism 71'7) is shown conditionally, which is attached to the hydraulic cylinder 19 for positioning the roller 12 with the elastic cover 13 in the '#-inward direction. There is. The operative connection between the adjustment and displacement mechanism 71 and the half-ball displacement mechanism 18 includes a lead screw 72, one end of which is connected via a pivot ψ stud 73 and a bifurcated member 74. , a roller 12 with an elastic cover 13
Hydraulic cylinder 19.20 (
Figure 1). Screw 72 (6th
Figure) ■The other end is free.

Each lead screw 72 engages a nut 75 with the rim of the worm gear, which nut 75 is supported by a thrust bearing 77, which in turn is in turn connected to an adjustment screw mounted on the frame 1. It is supported by a housing 78 of the displacement mechanism 71. The housing 78 of each adjustment and displacement mechanism 71 has a bearing 79 or 80 corresponding to the shaft O of the form gear. In order to ensure a synchronized displacement of the lead screw 72 during the adjustment process, the shaft 81 of the form-gear is attached to both worm-gears 1t.
76, and can be rotated by a drive device 82 including an electric motor 84 and a reduction gear 83.

According to the machine fiK of the invention, the adjustment and displacement mechanism 71 of the roller 12 (FIG. 1) with the elastic cover 13 further comprises:
A flexible band 86 is connected to a ruler 850 etc. (Fig. 6) attached to the frame 1 and a roller 12 having an elastic cover 13 (Fig. 1).
Contains.

The ruler 85 (FIG. 7) is attached to the frame 1 via a plate 87 mounted on a bracket 88, 89 mounted on a housing 90 which is connected to the frame 1 via an upright member 2. 1 (Fig. 6). The ruler 85 has a roller 122) with an elastic cover 13) corresponding to each eye immediately of the radial displacement! 91 (Fig. 7).

￥A Housing 78 of adjustment/displacement mechanism 71 (Fig. 6)D
One end of the flexible band 86C1 is attached to one end,
The band 86 is a guide roller 92.93.94.95.9
6, and these rollers extend through the bracket 97 of the housing 78 of the adjustment/displacement mechanism 71, respectively.
Brackets 88, 89, radial displacement machine area 18 of roller 12 with elastic cover 13; lead screw 72 firmly attached to housing 99 of hydraulic cylinder 19;
The two-pronged member 74'7) is attached to the bracket 98. The bent end of the fusible band 86 supports a weight 100 that tensions the band. The frame IO upright member 2 is provided with an opening 101 through which the band 86 passes. band 8
6 is the forming roller 501? It has scales 102 (zero 7 diagram) corresponding to i'd' respectively.

The value of the forming roller 5 is selected in accordance with the diameter, thickness, and material of the material to be bent in the D2 roller sheet bending machine. Depending on the forming roller 5D diameter range required to bend the required range of material in a given sheet bending machine, this machine may have a corresponding number of forming rollers 5D on the rollers 50 to ensure stability. ■ A support 35 is provided.The machine partially shown in Figure 2 has a cross member 33 supporting three walls or webs 34, 103, 104, The bodies each have a support 35.105.106, each of which supports a forming roller 5.107.108. Correspondingly, in FIG. are the forming rollers 5.107.108 corresponding to the supports 35.105.106 (Fig. 2) ■Three scales 102.109 corresponding to their respective diameters.
．． It has 11O.

Housing 9 housing ruler 85 and band 86 therein
(It is covered by a transparent panel 111.

In order to operate the two-roller sheet bending machine explained above, the O adjustment is performed as follows.Handle wheel46.47
(Fig. 1) and pull it out from the opening 42.43 of the two-tapered bottle 44.4517 flange 4o, 41.

The crosspiece 33 is then rotated about its axis and positioned so that the wall or web 34 corresponding to the selected forming roller 5 is vertical and the roller 5o is facing downwards. The selection of the wall 34 corresponding to the forming roller 5 is made such that the line α defined by the tangent that touches the circumference of the roller 50 at the point where the roller 5o meets the forming roller 5 does not exceed 140i.

By operating the knob 69 (FIG. 5), the stud 65 is pulled against the pressure of the compression spring 68, so that the end of the stud 65 is inserted into the bracket 64'Z) hole 6 of the respective device 36,37.
Hide it inside 6.

The forming roller 5 has a diameter %d# selected in accordance with the diameter, size and material of the material 14 to be bent and bent the hard peripheral surface 6.
(Fig. 2) is set substantially with the shaft of the roller 50'7), and when the knob 69 ($5@) is released, the spring 68 pushes the end of the stud 65 into the annular pI 67 of the forming roller 5. Similarly, a corresponding stand 65 is introduced into the annular groove 677 provided on the opposite head of the forming roller 5.

The electric motor 84 (FIG. 6) is then energized to rotate the worm gear shaft 81 via the reduction gear 83. , thus driving the nut 752) to the green 76 of the mug gear. Nut 75 rotates on a thrust bearing 77 to effect translational movement of lead screw 72.

Therefore, the guide roller 92 is connected to the bracket 98 attached to the prong member 74 of the lead screw 72 and the lead screw 7.
2 moves upwards with itself and rollers 96.95.94.
93 and pull up the band 86 lifting the weight 100. During this passage of the band 86, the band 86 is provided with a scale 102 corresponding to the diameter -d of the respective forming roller 5, which moves relative to the ruler 85 and is protected by the stud 65. The electric motor 84 continues to be energized until the scale corresponding to the diameter %d of the forming roller 5 is held against the ruler 850th @91. cover 13
7) Handle the situation as much as necessary.

The adjustment operation is now complete.

This machine operates as follows.

Add 7JO pressure to Sakusai fluid and make hydraulic cylinder 19.20■
Inject into the space under the piston, cylinder 19.20'7
) Each ■piston rod 25.26 has a protrusion 27.
28 on the jaws 10.11 to rotate them around the shaft 9.

Thus, the roller 12 with the elastic cover 13 is moved towards the forming roller 5 and engages it, so that the forming roller 5 presses against the roller 50 of the support 35. When the roller 12 with the elastic cover 13 is further moved, the forming roller 5 sinks into the elastic cover 13, causing deformation of the elastic cover 137). The roller 12 with the elastic cover 13 rotates the forming roller 5 by contact friction.

The workpiece 14 is fed into a nip between rotating rollers 5 and 122) so that the rollers 5 and 12 nip the workpiece 14 and move the workpiece 14 by friction. During this time, the force generated by the deformation of the elastic cover 13 causes the blank 14 to bend around the forming roller 5. The same force is applied to the forming roller 5. The forming roller 5 presses against the support roller 50 disposed along the entire length of its generatrix, and the forming roller 5 is in an advantageous state with respect to bending in the longitudinal direction, so that the forming roller 5D is The rollers 12, which do not exceed the permissible straightness, rotate until half the length of the blank 14 is bent. This is possible due to the thin-walled construction of the walls or webs 34. Therefore, material 14'Z
) feeding continues until after its end hits the wall 34;
The elastic bending of body 34 continues until half the length of material 14 has passed through the rollers 5 and 12 nip. Next, the rotational drive source 17'Z) of the roller 12 having the elastic cover 13 is released, and the fluid under pressure is injected into the space above the piston O of the hydraulic cylinder 19.20, and the piston fist rods 25, 26 The jaws 10.11 move downwards through their respective projections 27.28.
Rotate. As a result, the roller 12 with the elastic cover 13 moves away from the blank #14 and the forming roller 5. The forming roller 5 is suspended during the removal of the blank 14 by the annular groove 67 catching on the retaining device 36,37Cl stud 65 of the forming roller 5.

Next, the forming roller 5 is repeatedly inserted into the elastic cover, and the rollers 5 and 12 are rotated, and the remaining half of the length of the material 14 is bent by the same operation as described above.

Bending of the material by using the mechanism 52 for removing some of the rollers 50 from around the forming roller 5 is performed as follows.

Comparative Terms and Conditions Made of metal, support member 57 (Figure 4) V
Short and thin sheet materials of equal or shorter length are bent by operating the mechanism 52 that removes the roller 5o from the circumference 6 of the forming roller 5D.

The radial displacement and rotation of the roller 12 is performed in a manner similar to that described above. The material is fed through the nip between the rotating roller 5 and 120 by the thickness of the material 05 to 1o4jf; and the end portion of the material O is preliminarily bent. The rotation is then interrupted for the first time and then reversed to eject the material from the nip between rollers 5 and 12. A similar operation is performed on the opposite end of the material.

Next, the rotation of the roller 12 is interrupted, and the applied pressure is removed from the roller 5 while the roller 12 is moved to the lowered position.

Then, the pressure cylinder 53' is transferred to the hydraulic cylinder 53'.
7) Inject the cutout 58 of the wall 34 into the lower space and rotate the support member 57 around the shaft of the protrusion 59 together with the roller 5o via the bracket 56, piston, rod 54.55. open.

The roller 12 having an elastic cover is displaced in the horizontal direction on the above-mentioned scale.

The blank with pre-bent ends is placed in the Q-nip between rollers 5 and 100 and bent into a circular shape in one feed. Next, the roller 12 is lowered, the bent material is removed along the generatrix of the forming roller 5, and the pressurized f'11-key fluid is injected into the lower space of the hydraulic cylinder 53 (the support member 57 is first ■Return to position.

The two-roller sheet or plate bending machine disclosed herein includes:
A wide range of tubular products and tubular parts from aluminum and titanium plated sheet materials, such as aircraft tubing and tubular parts for antifreeze systems and life support equipment, as well as small quantities of these products made of corrosion-resistant steel. It can be used with great economical and technical effect in manufacturing. This machine can handle titanium alloys up to 1.5 mm thick,
Aluminum alloys of up to 3° Omm and having a length of 1600 mm are used for bending articles. When the machine disclosed herein is used for sheet bending machines, brakes, and presses, and for tearing tubular products and tubular parts, the bending work productivity can be reduced to 5@, while the hand-finished Kui Qin quantity can be reduced. It can be reduced by less than half.

[Brief explanation of the drawing]

Figure 1 shows a two-roller sheet bending machine according to the present invention.
Overall front view, Figure 2 is a sectional view along the line R in Figure 1,
FIG. 3 is a partial enlarged view of FIG. 2 showing the forming rollers (enlarged view of the engaging support rollers), and FIG. Fig. 5 is a partial enlarged view of the device for holding the forming roller; Fig. 6 is a partial enlarged view of the device for holding the forming roller; Adjustment/displacement mechanism■Cross-sectional view, Figure K7 is a drawing seen from the direction of the arrow in Figure 6. Am 1: Frame 2.3: Upright member 4: y! Tie material 5: Replaceable forming roller 6
: Hard surrounding surface 7.8: Hole 9: Shaft 10.11
12: Roller 13: Elastic cover 14: Sheet material 15: Metal core 16: Ring 17: Rotational drive source 18 Two radial displacement mechanisms 19.20: Hydraulic cylinder 21.22: Stud 23.24 Nibble bracket 25.26: Piston・Rod 27.28: Protrusion 2
9.30 Nislot 31.32: Stud 33: Cross member 34: Wall body 35: Support body 36.37: Forming roller holding device 38.39: Support member 40,41:7 Lunge 42.43: Opening 44.45: Tapered pin 4
6.47: Handle wheel 48 Nislot 49: Extension 50: Roller 51: Shaft 52: Mechanism for removing several rollers 53: Hydraulic cylinder 54: Piston rod 55: Rod 56: Bracket 57: Support book Member 58: Cutout 59: Protrusion 60: Groove 61: Shaft 62:
Main body 63 Nib bracket 64 Nib bracket 65: Stud 66: Blind hole 67: Annular m 68: Compression spring 6
9 nip 70: Through hole 71: Adjustment/displacement mechanism 72
: Lead, screw 73: Stud 74: Fork member 75
: Nut 76: Worm gear green 77: Thrust bearing 78: Housing 79.80: Pairing 8
1: Worm gear shaft 82: Rotary drive device 8
3: Speed gear 84: Electric motor 85: Ruler 86
:Flexible band 87:Plate 88.89Nib bracket 90:Housing 91:Scale 92.93.94.
95.96: Guide roller 97: Bracket 98 Nibble bracket 99: Housing 100: Weight 101: Opening 102: Scale 103.104: Wall 105.1
06: Support 107.108: Molding a-ra 109.
110 Ni Scale 111: Cover Patent Applicant Agent Patent Attorney Fumi Sato (and 1 other person) F Hiro 2 Continuation of 1 page ■Inventor Ildas Muhametga Soviet Union Kasan Levyutsch Zakiro Cheeraf 5F for Hoes

Claims (7)

[Claims] (1) a frame (1) having upright members (2, 3), mechanically connected to the upright members (2, 3) and having a rigid peripheral surface (6);
) with a replaceable forming roller (5) and a roller (12) with an elastic cover (13) attached to the uprights (2, 3), the elastic cover (13)
The roller (12) has a configuration suitable for bending the sheet material (14) relative to the forming roller (5), and is equipped with a rotational drive source (17) and a mechanism for radial displacement ( a two-roller sheet bending machine such as that connected to an upright member (18) of the frame (1);
2, 3) supporting at least one wall (34) supporting a support (35) which engages the forming roller (5) during the bending operation. A two-roller sheet bending machine, characterized in that the wall is fitted at both ends with devices (36, 37) for holding the forming rollers (5) during the operation of removing the bent material. . (2) In claim 1, the support (35)
includes rollers (50) arranged in two rows parallel to the generating line of the forming rollers (5), and the rollers (50) are arranged in two rows parallel to the generating line of the forming rollers (5).
) A two-roller sheet bending machine, characterized in that the maximum value of the angle (α) between the tangents touching the circumference of the roller (50) at the point of engagement with the roller (50) is not greater than 140. (3) In claim 2, the roller (50)
A two-roller sheet bending machine, characterized in that it is arranged along the entire generatrix of the forming rollers (5). (4) In claim 2, the forming roller (5
) is provided with a mechanism (52) for removing several rollers (50) from the periphery of the rollers (50), which mechanism (52) is connected to a hydraulic cylinder (53 ).
Sheet bending machine. (5) In claim 1, the forming roller (5)
) is attached at one end to the wall (34) for axial displacement, and at the other end to the forming roller (5).
) A two-roller sheet bending machine, characterized in that it is provided with a stud (65) adapted to be received in a groove (67) in the end face of the machine. (6) In claim 1, during successive operations of adjusting the machine to forming rollers (5) of different diameters, the roller (12) with an elastic cover (13) against the wall (34) ), which mechanism (71) is operatively coupled to a radial displacement mechanism (18) of the roller (12) having an elastic cover (13). Features: 2-roller sheet bending machine. (7) In claim 6, the elastic cover (1
3) a mechanism for adjusting and displacing the roller (12) (
71) is a flexible band (8) operatively connected to a radial displacement mechanism (18) of a roller (12) having a ruler (85) attached to the frame (1) and an elastic cover (13).
6), and the ruler (85) has an elastic cover (13).
), the band (86) has a scale corresponding to the radial displacement of the roller (12) having a forming roller (5).
A two-roller sheet bending machine, characterized in that it has a scale (102) corresponding to each diameter (d) of the machine.