RU2225274C2 - Apparatus for bending strip and method for erecting construction with use of such apparatus - Google Patents

Abstract

FIELD: plastic metal working, possibly bending strip with profiled edges for making roofings at individual or industrial building, for erecting hangar or similar arch-shaped (cylindrical) constructions. SUBSTANCE: apparatus for bending strip includes device for profiling edges. At side of strip outlet from apparatus bending equipment is mounted; said equipment has framework with left and right brackets made in the form of supported levers jointly and successively connected with housing and one with another. Identical profiling rollers are mounted in pairs on said levers (each roller on separate shaft) engaging with profiled edges of strip. Pairs of rollers are mounted on levers with possibility of independent regulation of their position in vertical plane by means of left and right supports for providing predetermined radius surface. Such apparatus is used for erecting arch-shaped (cylindrical) constructions. Method comprises steps of placing apparatus for bending onto movable platform; making constructional members and simultaneously placing them on preliminarily arranged carcass; cutting them according to desired dimension of outer surface of construction; moving platform along erected construction according to width of placed member; then repeating cycle. EFFECT: possibility for making compact rational simple at exploitation apparatus for bending strip, simplified lowered-cost method for erecting construction due to missing several operations realized with use of additional equipment. 3 cl, 6 dwg

Description

 The invention relates to the processing of metals by pressure and can be used for bending strips with profiled edges, used when performing roofing in individual or industrial construction, for example, in the construction of hangars or similar arched (cylindrical) structures.

 A device for bending sheet blanks from the description to ed. testimonial. 394128 "Machine for bending sheet blanks", IPC B 21 D 5/06, published on 08/22/73, bull. 34, comprising a bed, feed rolls, a bending roll and a mechanism for supporting the curved portion of the workpiece, made in the form of a lever system.

 However, the device provides only one operation: bending sheets of a certain radius of curvature. When performing roofing works, namely during the construction of arched structures, the sheets should have profiled edges for their subsequent joining using a fold connection.

 A device is also known for bending sheet material from a description to ed. testimonial. 516461 "Device for bending", 2 IPC B 21 D 5/06, published 05.06.76, bull. 21, comprising a bending machine with a bed, defining and receiving roller tables, a frame with rollers, made sectional.

 However, the described device has the same drawback: it provides the ability to perform only one operation - bending sheets without first profiling their edges.

 A device for profiling the edges of a strip or tape from the description of patent 2177850, IPC B 21 D 5/08, published January 10, 02, bull. 1, 2002 (prototype). The device contains a frame, shafts installed in bearings that are mounted on the frame. On the shafts profiled rollers of different shapes are fixed in pairs on the left and right to obtain different profiled edges: left and right. The rollers are mounted with the possibility of changing the distance between them for profiling strips of different widths.

 However, the described device allows to obtain a straight strip with profiled edges from a straight or roll strip. To obtain a curved, radial surface, it is also necessary to have equipment for bending. In addition, the operation of obtaining a curved surface of a given radius is complicated by the fact that the right and left edges of the strip due to different shapes have different stiffness and elastic properties, therefore, when bending strip with profiled edges along the entire width of the same radius, the bent strip is actually screw, and not radius (cylindrical) shape. This defect can be eliminated by bending the left and right edges of the strip along different radii, that is, by bending one edge relative to another. Moreover, an edge with greater elasticity requires bending along a smaller radius.

 During the construction of hangars and roofing, all of these operations are complicated, require the presence of several machines, which is expensive and inefficient.

 The objective of the invention is the creation of a compact and easy-to-use device for bending from a strip, preferably a rolled, curved (radius) surface with profiled edges, which is a ready-made starting material for the construction of hangars and other structures. The device combines the execution of operations as profiling edges and bending stripes along a given radius and is more economical than existing ones.

 The problem is solved due to the fact that in the device for bending strips, including a device for profiling edges, which contains a bed, shafts installed in bearings placed on the bed, with pairing rollers of different shapes fixed left and right on the shafts with the possibility of changing the distance between them and its fixation, on the bed, from the side of the strip exit from the profiling device, mounted bending equipment, consisting of a frame with left and right brackets, is made in the form of levers with supports pivotally and sequentially connected to the bed and between each other, while the levers are fixed in pairs identical to the profiling rollers, each on a separate shaft, with the possibility of independently adjusting their position in the vertical plane using the left and right supports and interacting with the profiled the edges of the strip to obtain a cylindrical surface.

 When changing the thickness of the profiled strip in the device, it is possible to change the distance between the axes of the shafts in the vertical direction, which is performed in a known manner.

The advantages of the invention and design features are illustrated by drawings, where:
figure 1 schematically shows a side view of a device for bending;
figure 2 is a top view of the device;
figure 3 is a section along aa of figure 1.

 The device for bending the strip consists of a device for profiling edges, which contains the frame 1, the shafts 2. mounted in bearings 3 mounted on the frame 1. On the shafts 2 pairwise, left and right are placed profiling rollers 4 and 5, having a different shape, which allows get different profiled edges with their subsequent docking with a seam connection. For profiling strips 6 of different widths, pairs of profiling rollers 4 and 5 are mounted on shafts 2 with the possibility of changing the distance between them and fixing it (not shown in the drawings, described in the prototype device).

 On the exit side of the strip 6 from the device for profiling edges mounted attachments for bending the strip 6, consisting of a frame 7, on which are fixed the left 8 and right 9 brackets. The brackets are levers 10 connected in series with each other and with the frame using hinges 11.

 The levers 10 have independently adjustable in the vertical plane of the support 12, respectively, left and right, connected to the frame 7. Regulation of the supports 12 in height can be carried out manually, for example, using a threaded screw-nut connection 13. The adjustment of the supports 12 should be independent, since the left and right edges of the strip 6 have a different bending profile, therefore, different stiffness and different elasticity, which is taken into account in the manufacture of a curved (radius) surface and will be given in the description of the operation of the device. The supports 12 are placed between the hinges 11. On the levers 10, the rollers 14 and 15 are identical in pairs, identical to the pairs of profiling rollers 4 and 5. Each of the pair of rollers 14 and 15 is mounted on a separate shaft 16. The mounting structure of the pair of rollers 14 and 15 on the shafts 16 is the same and similar to mounting pairs of profiling rollers 4 and 5 on the shafts 2 of the device for profiling edges, since the pairs of rollers 14 and 15 interact with the edges of the strip 6 coming out of the device with prepared profiled edges.

 The device for profiling edges with attachments has a drive that drives the shafts with profiling rollers.

 The device operates as follows.

 A strip 6 of a certain width is manually entered between the profiling rollers 4 and 5 mounted in pairs on the shafts 2 in order to obtain profiled edges. With the help of the drive, strip 6, receiving the edge configuration necessary for roofing, continues to move at the exit from the device and falls between pairs of rollers 14 and 15 of the attachment for bending the strip. If necessary, the strip 6 is manually tucked into the gap between the rollers. Before starting work, the left 8 and right 9 brackets with levers 10 are set in a position by changing the height of the supports 12 to ensure that the left and right edges of the strip 6 move along trajectories corresponding to the necessary bend of one edge (with less rigidity) with respect to the other, namely due to the different bending radii of the left and right edges of the strip 6. Visual observation makes it possible to adjust the height of the supports 12 and get a bent strip 6 with profiled cylindrical edges of a given radius over the entire width of the strip.

 Thus, deformation (twisting) of one edge of the strip 6 relative to the other is excluded.

 When changing the width of strip 6 in the device, it is possible to move and fix one of the pairs of rollers on each shaft 2 and, accordingly, on separate shafts 16. When changing the thickness of strip 6 between the bearing housings 3 of shafts 2 and 16, interchangeable spacers are provided (not shown in the drawings).

 The described device is compact, easy to operate and maintain, and allows its use in roofing in individual or industrial construction during the construction of hangars or similar arched (cylindrical) structures. The device is also applicable for bending strips with pre-profiled edges on any other machine. In this case, only attachments are used on their own, equipped with a drive and additional pairs of pulling rollers installed at the entrance of the strip. The following describes the method of construction using the above and presented on the drawings device.

 The method of erecting the construction of the arch structure is known from the description of the invention to application 94014474 "Method of mounting the construction of the arch structure", IPC 6 E 04 C 2/32, published on 10/10/95, bull. 28 (prototype).

 The method consists in the fact that the arched elements obtained as a result of profiling and bending of sheet web material are combined in sections of 3-4 elements that are installed on the base, interconnected by a folding machine, and the subsequent sections are oriented along the longitudinal edges until the design the length of the structure.

 However, the described method has a drawback characteristic of existing methods of erecting such structures: profiling and bending of elements from sheet web material are preliminarily made and combined into sections of 3-4 elements in the factory or in workshops where the corresponding equipment is available. Directly at the construction site there should be a place for storing sections, vehicles for their delivery and a lifting mechanism for lifting and installing sections at the construction site.

 The objective of the invention is to simplify and reduce the cost of the method of erecting structures of arched (cylindrical) shape, exclude a number of operations that require additional equipment, and therefore, increase the cost of the method of work.

 The problem is solved due to the fact that in the proposed method, when constructing a structure from elements obtained as a result of edge profiling and bending a strip of rolled material, which includes sequential installation of elements on a pre-installed base along the length of the structure, profiled edges to each other and connecting them to using a folding machine, each element with profiling edges and a flexible strip of cylindrical shape is made at the construction site using the described above the device, which is installed on a movable platform so that the strip exiting the device is guided and laid on a base made in the form of a frame with a width along the length of the structure, while the strip is made with a length equal to the arc length of the outer surface of the structure, cut with a cutting tool, and then the running gear the platform is moved along the erected structure to a distance equal to the width of the element, and then the cycle is repeated until the specified length of the structure is obtained.

The advantages of the method and its features are illustrated by drawings, where:
in FIG. 4 schematically shows the first stage of the construction of the structure (front view) with a device for bending;
in FIG. 5 is a side view of a structure with a partially installed structure;
Fig.6 is a front view of the structure: a strip along the length of the outer surface of the structure is prepared for laying on the crate.

 To implement the method (Figs. 4, 5 and 6) of the erection of the structure 17, it is necessary: building elements 18, which are obtained on site using the above-described bending device 19, which also performs profiling of the left and right edges of various shapes, frame 20, any a mobile device, for example, a mobile platform 21, web material 22, a tool for cutting a strip of the desired size and a folding machine (not shown in the drawings, since they are not the subject of the invention and can be of any design).

 The method of construction of the arch (cylindrical) shape: hangar, warehouse, storage, etc. consists in the following.

 At the construction site 17, the frame 20 is pre-installed and all the necessary equipment is delivered: a bending device 19, a mobile platform 21, rolled material 22, designed to receive building elements 18, a cutting tool (not shown in the drawing) and a folding machine (not shown) . The device 19 is installed on a movable platform 21 so that the strip coming out of it - the building element 18 is directed along the length of the structure 17. The rolled material 22 is fed into the device 19, having previously adjusted it to the required surface radius, as described above when describing the device for flexible, and include it. Each building element 18 is made in place with profiled edges ready for joining and a radius bent surface. The strip - the element 18 exits the device 19, is laid on the frame 20, and upon reaching a size equal to the length of the arc of the outer surface of the structure 17, it is cut off. After this, the roofer can only correct the position of the element 18 on the frame 20. The device 19 is turned off and the mobile platform is moved along the structure 17 to a distance equal to the width of the element 18, then the cycle is repeated, i.e. the next element 18 is made while laying it on the frame 20. The elements are connected to each other using a folding machine.

 During the construction of small structures, the bending device can be permanently installed on the end supports directly on the soil at the edge of the structure, and the building elements made with the device are then alternately manually laid on the frame one by one and connected to each other using a folding machine.

 The described device for bending and the method of erecting a structure with a surface from bent elements using this device can accelerate the production of roofs for hangars, warehouses and other structures, exclude intermediate storage and delivery of elements to the construction site, and can improve the quality of work, since when moving bent elements may damage and deform. The invention reduces the cost of doing work and increases their efficiency.

Claims (2)

1. A device for bending strips, including a device for profiling edges containing a bed, shafts installed in bearings placed on the bed, pairwise profiled rollers of different shapes fixed left and right on the shafts with the possibility of changing the distance between them and fixing it, characterized in that on the bed, from the side of the strip exit from the profiling device, mounted bending equipment, consisting of a frame with left and right brackets, made in the form of a hinge and a follower but connected to the bed and to each other, levers with supports, while on the levers identical rolls are fixed in pairs, each on a separate shaft, with the possibility of independently adjusting their position in the vertical plane using the left and right supports and interacting with the profiled edges of the strip to obtain a cylindrical surface. 2. A method of erecting a structure, including the sequential installation of elements on a pre-installed base along the length of the structure with profiled edges to each other and connecting them using a folding machine, characterized in that each element is made by profiling the edges and bending the strip into a cylindrical shape at the construction site using the device for bending the strip according to claim 1, which is installed on a mobile platform so that the strip coming out of the device is guided and stacked along the length of the structure onto the base, made in the form of a frame, the strip is made with a length equal to the arc length of the outer surface of the structure, cut with a cutting tool, after which the mobile platform is moved along the structure to a distance equal to the width of the strip, and then the cycle is repeated until the specified length is obtained facilities.

Images