Method for shaping tubular parts of sheet material and apparatus for performing the same

FIELD: plastic working of metals, possibly shaping portions of main pipelines, making metallic columns with round or polyhedral cross section.

SUBSTANCE: method comprises steps of bending blank by rotary local deforming of it in parallel relative to its lengthwise edges; beginning bending of blank by alternatively bending up its lengthwise edges; then performing next step of bending of blank from each bent-up lengthwise edge until mean part of blank. Apparatus for performing the method includes mutually engaging upper and lower deforming units. Upper deforming unit is in the form of pressure roller type device and it is mounted on rod of power drive with possibility of reciprocation motion in vertical plane. Lower deforming unit is in the form of drive roller or two -support beam. Pressure roller type device is joined with rod of power drive through cutter-like yoke that is formed according to condition of closing lengthwise edges of sheet blank with it.

EFFECT: lowered labor consumption of manufacturing process.

7 cl, 1 tbl, 5 dwg

 

The invention relates to the processing of metals by pressure and can be used in mechanical engineering in the shaping elements of pipelines, metal pillars round and multi-sided cross-sections.

Well-known and widely used for forming tubular parts flexible ways using three - and four-roll plate bending machines - roller, and for parts of the metal pillars - flanging press. The main disadvantage of these methods is incomplete ACC edges, even on four-roll mill nedohin edges is 3-4 thickness of the sheet stock, and, in addition, due to the resulting edge effects (houses) the collection of such parts for welding unsatisfactory.

To produce billets pipelines are widely used production line, on which the forming of pipes is performed with the use of powerful presses and at least three sets of stamps (see Moshnin E.N. Flexible, tight and edit on the presses. M, motor cycle", 1959, p.86). Thus, in the production line of the German company "Schiermell Platte" is used to bended form edges, flexible pipes and clamping of the edges of three powerful media force accordingly 2000, 8000 and 3000 TC. However, these methods of forming tubular parts require high Fondo-, material - and energy technology the process is.

Noted disadvantages of the conventional processes of forming tubes is largely eliminated by the use of rotary-local methods of deformation. These methods due to minimum hearth plastic deformation reduces the required effort of morphogenesis in 15-25 times and provide a new level of resource (see Alexandrov V.L., E, Gorbach, Kuklin O.S, Shebarshin VP High breakthrough technologies bending and straightening. "Bulletin of shipbuilding technology", 1996, №4).

Methods for flexible methods of rotary-local deformation (RLD) and new types of multifunctional bending equipment, designed to use these methods, is protected by patents of the Russian Federation (No. 2102170 from 18.01.93; No. 2129929 from 06.08.97; No. 2191082 from 20.10.02 and others).

Closest to the claimed method and device are the method of forming the bent sheet parts and bending-straightening machine for its implementation by the RF patent №2191082, publ. 20.10.2002 in BI No. 29, which are adopted for the prototype.

Method of forming sheet parts for the prototype is rotary-local deformation roller deforming elements in the form of an upper pressure and a lower drive rollers.

Bending-straightening machine prototype is intended for forming the bent sheet parts and comprises a frame is placed on her upper and lower beam, bearing respectively the upper and lower roller deforming elements, the top of which is mounted on the shaft of the power drive with the possibility of reciprocating movement in vertical and horizontal planes, and the bottom is made with a rotational drive, and, in addition, they are installed with the possibility of interaction between themselves and synchronous movement along the traverse.

The disadvantages of the above technical solutions of the prototype in relation to the shaping blanks of tubular parts is the need to fully bended form edges, excluding allowances and the impact of edge effects on the collection of closed contour details.

The present invention is to achieve a significant saving in the time of forming tubular parts from sheet method minisinoo rotary-local deformation in comparison with the traditional methods of flexible tube elements on rotary machines and forging complexes, in addition, required tolerances and acceptable performance of the process and the exclusion of adverse influence of the edge effects.

The problem is solved to achieve the technical result as reducing the complexity of the technological process of forming sheet parts.

Achieving this technical is one result in the implementation method for use in the totality of significant distinguishing features: rotary is a local deformation of the workpiece carry out parallel to its longitudinal edges, when this bending start with alternate bended form longitudinal edges, and then make subsequent step-by-step bending of the workpiece from each of the bent longitudinal edges to the middle of the billet.

In the particular case of offer in the way of technical solutions rotary-local deformation is performed with deviation from both end edges of the workpiece by an amount equal to 5-10 size of its thickness.

The achievement of the technical result in the device is carried out using the totality of the following distinctive characteristics: a device for implementing the inventive method deforming the lower unit is designed in the form of a drive roller or supported beam, compression roller device is connected with the rod actuator by means of a knife-like casing made of sheet stock.

In the particular case of the proposed device technical solutions for press roller device is designed as a roller.

In another particular solution press roller device mounted for movement in the form of a set of rollers, the diameter of which increases sequentially in the direction reverse to the movement.

In the following particular solution press roller device is installed with the ability to move and made in the form of n is boron rollers of the same diameter, located at progressively decreasing distance from the workpiece in the direction opposite to the specified move.

In yet another particular solution in the place of contact of the knife-shaped clip with smykanie longitudinal edges of the workpiece installed protruding vertical rollers rotating in contact with the moving longitudinal edges.

Figure 1 - the initial position of the workpiece;

figure 2 - the subsequent procurement location for full bended form edges;

figure 3 - the final position of the workpiece in a deforming roller assemblies;

4 is a top deforming the site, made in the form of a set of rollers increases the amount of deformation due to a consistent increase in the diameters of the rollers and reduce the radius of their cross-section;

5 is a top deforming the site, made in the form of a set of rollers of the same diameter, having the ability to adjust roller height.

The shaping sheet 1 begins (figure 1) with one of its end edges on the support 2 of the lower drive roller or supported beam, with which communicates the upper compression roller device 3, with l1is the distance between the support points of the workpiece on the support 2. Subsequent displacement, shown in figure 2, the same edge of the workpiece 1 is placed between the supports from the rivers is minuimum shoulder from the axis of deforming elements of l p=0,1-0,3 l1that ensures practically complete pogibko edges (see Kuklin O.S Theory and calculation processes flexible high-strength steels. L., Shipbuilding, 1982, s, 125).

Then the same operation is performed with the opposite edge, and then follows a step-by-step bending of the workpiece 1 from the edge to the middle of it, first on one side and then on the other edge to the middle before full clamping the longitudinal edges of the knife-like piece on the holder 4 (Fig 3). This clip connects the upper deforming roller Assembly 3 with the rod of the power drive of the machine. On the knife-edge part of the shroud mounted speakers rollers 5 which is free to rotate upon contact with the workpiece in the direction 6 of its movement (figure 4).

Figs.4 and 5 show the upper deforming the site, made in the form of a set of rollers 3, 7 and 8, due to the pressure which the workpiece 1 is increasing the amount of its deformation in the direction of 6 moving deforming site. The increase in the deformation is achieved or the height of the rollers 3, 7, and 8 (6) or (5) consecutive increase their diameter and the radius decreases their cross-section. The amount of increase in the deformation of the workpiece from the roller to the roller is distributed evenly as possible between successive rollers in the direction of movement 6 of deformation is youseo site. Figure 4 also shows the roller insert 5, protruding from both sides of the knife-shaped clip 4, which slide smileme edge of the workpiece.

Figure 5 shows the rotary casing 9 secured to them by the rollers 7 and 8 and the adjusting screws 10 to adjust the roller height, and the adjusting screws are fixed by the stoppers 11 for positioning of the rollers.

Experimental verification of the proposed method and the device was performed on a sample of the automated bending-straightening machine AGPM-15M in production conditions FSUE CRIST when forming round and multi-sided in cross-section of the tubular parts made of steel St3 with a minimum diameter of 100 mm and the thickness of the blank 2-3 mm. Test showed the ability and efficiency of the proposed method and device.

In relation to the production of elements of main pipelines of large sheets received at the mill 5000” JSC “Severstal”, performed experimental work on the basis of the present invention, which showed a substantial saving in its implementation compared with the traditional methods of formation and standard equipment. The obtained results are summarized in the accompanying table.

1. The method of forming tubes is atih parts of the sheet, including the bending of the workpiece by means of its rotary-local deformation, characterized in that the rotary is a local deformation of the workpiece carry out parallel to its longitudinal edges, while the bending start with alternate bended form longitudinal edges, and then make subsequent step-by-step bending of the workpiece from each of the bent longitudinal edges to the middle of the billet.

2. The method according to claim 1, characterized in that the rotary-local deformation is performed with deviation from both end edges of the workpiece by an amount equal to 5-10 size of its thickness.

3. Device for forming tubular parts from a sheet containing interacting deforming the upper and lower nodes, the upper deforming unit is designed in the form of the pressure roller device and mounted on the shaft of the power drive with the possibility of reciprocating movement in a vertical plane, characterized in that the lower deforming unit is designed in the form of a drive roller or supported beam, compression roller device is connected with the rod actuator by means of knife-shaped clip made of conditions for snapping at her longitudinal edges of the tubular sheet.

4. The device according to claim 3, characterized in that the control roller device made in the form of ro is the IR.

5. The device according to claim 3, characterized in that the control roller device mounted for movement in the form of a set of rollers, the diameter of which increases sequentially in the direction reverse to the movement.

6. The device according to claim 3, characterized in that the control roller device mounted for movement in the form of a set of rollers of the same diameter located at progressively decreasing distance from the workpiece in the direction opposite to the specified move.

7. The device according to claim 3, characterized in that the contact knife-shaped clip with smykanie longitudinal edges of the workpiece installed protruding vertical rollers rotating in contact with the moving longitudinal edges.



 

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