Blank shell multilayer products

 

The invention relates to the processing of metals by pressure and is used in the manufacture of laminated products stub type. Blank shell multilayer products are made in the form of a hollow double-walled Cup having inner and outer cylindrical tubes connected to the toroidal section. Between the outer pipe and the toroidal section, on the one hand, and the toroidal section and the inner pipe, on the other hand, is made of the inner and outer lead sections in the form of hollow truncated body of revolution, the cavity of which have a variable diameter along the height. The cavity of the outer lead-in area is made from increasing, and the cavity inner lead-in area with decreasing toward the cylindrical pipe diameters. This reduces the deformation force in the initial calibration of prefabricated blanks and get bulk procurement of high quality without distorting their shape. 4 Il.

The invention relates to the processing of metals by pressure and can be used in the manufacture of laminated products stub types, in particular fuel elements of nuclear reactors.

Known harvesting obolochkah outer and inner cylindrical tubes, United toroidal section (M. Mr. Gorbunov. Stamping parts from tubular blanks. - M: motor cycle", 1960, Fig.63, a).

This billet shell is used for Assembly with billet core, after which the team of the workpiece is subjected to calibration through deformation of the outer and inner surfaces, sealing, welding and thermal diffusion processing.

The reason that prevent obtaining the specified lower technical result when using the known half-finished shell of laminated products, is the low quality of the obtained multilayer products. This is because when calibrating prefabricated blanks of laminated products, consisting of a blank shell and billet core and, if necessary, cover performed to fetch the technological gap between their surfaces, in the initial calibration, in some cases, the plastic deformation of the billet core, through which the transmission calibration due to the significant efforts of deformation of the toroidal section of the billet shell due to its high rigidity due to the small radius, the ends of the workpiece gel core is s shaped ends of the billet core is greater, the greater the degree of deformation during calibration prefabricated blanks. The uneven deformation in the calibration of prefabricated blanks caused by raznesennost as semi-core, and outer and inner ends of the billet shell, leads to additional efforts calibration at the initial moment of deformation, which, in some cases, exceeds the force that determines the stability of the preform core under axial loading. In this case, the billet core loses axial resistance and is bent in the longitudinal direction. The resulting distortion of its shape, lead to zabrakovanie team blanks or finished laminated product.

The main task, which is aimed stated billet shell layered products, is to improve the quality of multilayer products.

The technical result achieved in the implementation of the claimed invention is the reduction of the strain deformation in the initial calibration of prefabricated blanks and, as a consequence, obtaining prefabricated blanks and the finished multi-layer products specified form.

This technical result is achieved by the fact that in the known workpiece shell mnogosloino the tube, United toroidal section, between the outer pipe and the toroidal section, on the one hand, and the toroidal section and the inner pipe, on the other hand, made respectively of the inner and outer lead sections in the form of hollow truncated body of revolution, the cavity of which have a variable diameter along the height, the base of larger cross-section of the outer lead-in area is connected with the outer pipe, the base of the lower cross section of the inner lead-in area is associated with the inner pipe, while the cavity of the outer lead-in area is made from increasing, and the cavity inner lead-in area with decreasing toward the cylindrical pipe diameters.

Conducted by the applicant's analysis of the level of technology has allowed to establish that the analogs are characterized by the sets of characteristics is identical for all features of the declared billet shell layered products and devices for their production, are absent. Therefore, the claimed invention meets the condition of patentability "novelty."

The study of known technical solutions in this and related areas of technology did not allow to identify the characteristics which are from the Oia provided the essential features of the claimed invention transformations on the achievement of the technical result. Therefore, the claimed invention meets the condition of patentability "inventive step".

The invention is illustrated by drawings.

In Fig. 1 shows a cross-section of the inventive preform shell multilayer products.

In Fig.2 and 3 shows a cross section respectively of the outer and inner lead sections of the billet shell.

In Fig.4 illustrates the stages of the calibration process team billet: position I - the beginning of the calibration team workpiece; regulation II - stage steady-state deformation of the shell team of the workpiece.

Blank shell multilayer products (Fig.1) is a hollow double-walled glass, consisting of 1 external and 2 internal cylindrical pipes connected toroidal section 3, while between the outer pipe and the toroidal section is made of the outer lead-in area 4, and between the inner pipe and the toroidal section is made of the inner lead-in area 5. The outer lead-in area (Fig.1) and the inner lead-in area (Fig.2) is made in the form of hollow truncated body of revolution (as an option - in the form of hollow truncated cones), the cavity of which have a variable diameter along the height. Palestians toward the cylindrical tubes 1 and 2 diameters. The basis of larger cross-section of the outer lead-in area 4 is connected with the outer pipe 1 and the base of the lower cross section of the inner lead 5 is connected with the inner pipe 2.

Blank shell layered product is used as follows.

In the specified blank shell 6 in the form of a hollow double-walled glass set billet core 1 made in the form of a hollow cylinder with toroidal sections on the ends, and then team the workpiece is placed in the gap between the matrix 8 and the mandrel 9 of the device for calibration of prefabricated blanks (Fig.4). The device for calibration of prefabricated blanks can be used for and.with. 1428483, 21 37/30, 1988 or under the patent 2111813, 21 37/30, 1998. Applying to the open end of the preform core 7, the deformation force of the punch 10, fixed to the drive plate press (conventionally not shown), carry out the calibration team workpiece by pushing between the working surfaces of the die and mandrel.

In the initial calibration (position I in Fig.4) due to the presence of the billet shell 6 of the outer and inner lead sections most of its toroidal section goes workplace Matri is s - in the area of the toroidal coupling and the outer lead sections, and the mandrel is in the area of the toroidal coupling and the inner lead sections. First, a deformation without thinning the walls of the outer and inner lead sections by sampling the technological gap between the billet shell 6 and the workpiece core 7, followed by extraction with thinning of the wall of the outer ends of the section and burnishing (distribution) with thinning of the wall of the inner lead-in area of the shell team of the workpiece. During calibration, the degree of deformation height as the outer and the inner lead sections of the shell team workpiece increases, reaching a maximum value at the moment of passing through calibrating the bands of the matrix and of the mandrel cross-sectional team of the workpiece passing through a plane interface: from the matrix of the outer lead-in area 4 and the outer pipe 1, and the mandrel inner lead-in area 5 and the inner pipe 2 billet shell. Upon further deformation of the national procurement carried out with a constant deformation rate, the shell tightly to the core, both the outer and NR is the edge of the product comes out of the working area of the device, removed from the punch by the stripper (conventionally not shown) and is removed from the working area of the press.

The parameters of inner and outer lead sections of the billet shell (diameters in the plane of the pair of lead-in areas and toroidal section, the angles forming the lead-in areas and others) are chosen so that in the initial calibration of the national procurement a large part of the toroidal section of the billet shell was held in the gap between the die and the mandrel, while providing minimal deformation of the shell.

The degree of deformation in the wall thickness of the outer and inner nozzle shell choose the minimum (2-10%). The specified values of the degree of deformation is caused, on the one hand, the need to ensure complete sampling of the technological gap between the billet shell and billet core, and on the other hand, the implementation of the calibration team workpiece with a minimum degree of deformation at the initial deformation of the shell, when the billet core, through which is passed the force calibration is a rod with neshaminy end, the axial resistance of which is minimal. Increasing the degree of deformation leads to increased ሺ/or loss of billet core longitudinal stability, which leads to zabrakovanie team blanks or finished laminated product.

The manufacturer stated billet shell multilayer products are performed by known methods, for example turning the original piece or backward extrusion ring blanks with the subsequent turning of the product received.

Using billet shell layered products of the claimed design has been executed in the external and internal lead-in areas specified form allows calibration team workpiece without deformation of its toroidal section, much of which passes freely into the gap between the die and the mandrel, contributing to a significant reduction efforts in the initial calibration, which leads to the production of prefabricated blanks and, accordingly, multilayer high-quality products without distorting their shape.

Thus, the above evidence shows that, when carrying out the claimed invention, the following conditions are true: - the means embodying the invention in its implementation, are intended for use in industry, namely in the production of laminated products sleeve-type, contractarian in the claims, confirmed the possibility of its implementation using the described tools and methods; - the means embodying the invention in its implementation, is able to obtain the technical result.

Therefore, the claimed invention meets the condition of patentability "industrial applicability".

Claims

Blank shell layered products, made in the form of a hollow double-walled Cup having inner and outer cylindrical tubes connected to the toroidal section, characterized in that between the outer pipe and the toroidal section, on the one hand, and the toroidal section and the inner pipe, on the other hand, made respectively of the inner and outer lead sections in the form of hollow truncated body of revolution, the cavity of which have a variable diameter along the height, the base of larger cross-section of the outer lead-in area is connected with the outer pipe, the base of the lower cross section of the inner lead-in area is associated with the inner pipe, when the cavity of the outer lead-in area is made from increasing, and the cavity inner lead section with the

 

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