Method for assembling composite billet to produce multiple-fiber conductor (alternatives)

FIELD: electrochemistry.

SUBSTANCE: proposed method involves filling of cylindrical bag with auxiliary parts which are then removed from bag and replaced by bar assemblies placed in definite sequence affording maximal filling density; sectional area of each auxiliary member differs from that of its substituting bar; central regular-hexagon shaped auxiliary member has face width A1 found from expression where a is hexagonal bar width, M is number of bars in diametric direction; second row around central member is alternately filled with auxiliary members of which three ones are regular-hexagon shaped members having face width A2 found from expression and three other hexagon-shaped auxiliary members have face width found from set of expressions all next rows are alternately filled with auxiliary hexagon-shaped members whose face width is found from set of expressions and remaining free space between hexagon-shaped auxiliary members, as well as cylindrical bags are filled with additional auxiliary members whose cross-sectional area provides for maximal filling of bags.

EFFECT: facilitated procedure, ability of filling billet with thousands of bars during its single assembly process.

3 cl, 7 dwg

 

The invention relates to the field of electrical engineering and can be used in devices intended for operation at low temperatures.

There is a method of assembling a composite billet for manufacturing a multi-fiber cables, in which a cylindrical case filled with rods, tightly Packed in a certain order [1].

In this way produces the Assembly of the composite billet with a small amount of fibers (usually not more than 200-300). To obtain a larger number of fibers in the composite wire operation the Assembly of the composite billet is repeated the necessary number of times. However, increasing the number of Assembly operations and, accordingly, the amount of extrusion of composite workpieces at elevated temperatures, to ensure a reliable metallurgical bond between the components of the composite workpiece and, accordingly, the possibility of further joint cold deformation, leads to a noticeable decrease in the operational characteristics of the wires, and output in valid.

Increasing the number of cores in a single composite blank is associated with a decrease in their size and, as a consequence, an increase in the complexity of their formation into a single beam and, as a rule, with increasing number of voids. Voids are present within the case and between the composite material is coy and the inner surface of the sleeve of the container, in which she is placed. The initial stage of deformation by the pressing - repressive, in which in the direction of least resistance workpiece under the influence of force of the punch is widened and is precipitated. When the ratio of the lengths and cross-sections of individual rod, considerably higher than the optimal, in the absence of reliable contact rods between themselves and the contact rods case, the deformation is almost similar buckling, resulting in a loss of the plastic resistance to deformation in the matrix of the container. This tendency increases with decreasing transverse size of the last.

There is a method of assembling a composite billet for manufacturing a multi-fiber cables, selected as a prototype [2], in which a cylindrical case filled with technological elements, which are then sequentially removed from the case, and deletions to replace the rods, each of which consists of individual rods, arranged in a specific order for maximum density, the element and replacing the rod have the same cross-section.

Described method of Assembly of the composite billet is preferred for rods assembled from individual rods of rectangular or square section, and allows you to get the comp the attributes wires with fiber count of 1000 and above. However, this method of assembling composite preforms poorly adapted to the Assembly of rods with hexagonal or circular cross-sections.

Modern conductors impose numerous requirements, including the size of the fiber and the distance between the fibers. Equal to the fixed distance between the fibers is an important condition for the formation of fibers in the deformation process with a cross section that is close to a circle as a means to increase current-carrying capacity and reduce energy losses. The same interfiber distance can only provide an Assembly of the composite billet from rods of hexagonal cross-section or circular cross-section. The method of Assembly of the rods of hexagonal or circular cross-sections using the substituted technological elements proposed by the prototype allows equal interfiber distance only within a single rod, consisting of rods, but it will be more emptiness.

Another disadvantage of the proposed method of assembling a composite billet from bars, rods, collected from rods of hexagonal or circular cross-section, is the inability to combine neighboring rods without additional clearances. The mismatch of rods leads to a distortion of the edge distribution of the fibers in the finished wire, increasing kolichestvennom - to the loss of the plastic resistance in compression or extrusion, and, as consequence, to decrease in electrical properties and output in valid.

The technical problem of the present invention is to simplify the Assembly of the composite billet from bars, rods, collected from rods of hexagonal or circular cross-sections.

The problem is solved so that if the known method of assembling a composite billet for manufacturing a multi-fiber cables, in which a cylindrical case filled with technological elements, which are then sequentially removed from the case, and deletions to replace the rods, each of which consists of individual rods, arranged in a specific order for maximum density, and technological element and replacement of the rod have the same cross-section, in the proposed method, the cross section of each of the technological elements differs from one section of a replacement rod, and in one embodiment, the Central element has a regular hexagonal shape with a width of verge A1, the value of which is determined from the expressionwhere a is the width of the hexagonal faces of the rod, M - number of terminals in the diametrical direction, the second row surrounding the Central element, filled alternately technological ELEH the customers, three of them have a regular hexagonal shape with a width of verge A2 determined from the expressionand the other three elements have a hexagonal shape, the width of which faces are consistently equal to

all subsequent rows are filled alternately by elements having a hexagonal shape, the width of the faces of which is equal to consistently

and the remaining free space between the hexagonal technological elements and the cylindrical case filled additional process elements. The cross-section of an additional process elements mimics the shape of the segments, determining the maximum filling terminals of the internal space of the case.

In the particular case of execution in the first embodiment, the cylindrical case filled with technological elements around a Central rod, which is a design element of the workpiece and having a regular hexagonal shape with wide faces A1, the value of which is determined from the expression

In another embodiment, the solution of a technical problem, a method for assembling composite billet for manufacturing a multi-fiber cables according to which a cylindrical case filled with technological elements, which are then sequentially removed from the case, and deletions to replace the rods, each of which consists of individual rods, arranged in a specific order for maximum density, the cross section of each of the process elements differs from one section of a replacement rod, provides that the Central element has a regular hexagonal shape with wide faces A1, the value of which is determined from the expressionwhere a is the width of the hexagonal faces of the rod, M - number of terminals in the diametrical direction, the second row is filled alternately technological elements of the hexagonal shapes of the two types, the width of the faces of each of which is successively equal to

in each subsequent row technological elements have a hexagonal shape in two types, the width of the faces of each of them successively equal to

and the remaining free space between the hexagonal technological elements and the cylindrical case filled additional technological elements, the cross section of which follows the shape of Simantov-sections shapes that define the maximum filling terminals of the internal space of the case.

List of figures

Figure 1 - scheme of the Assembly of composite blanks (the first option).

Figure 2 - equivalent circuit of the technological elements of the bars of the collected cores.

Figure 3 is a special case of the execution of the composite Assembly of the workpiece by the first option.

4 is a diagram of the Assembly of composite blanks (the second option).

5 is a circuit technological elements of the bars of the collected cores.

6 is a circuit technological elements rods collected from cores made from different materials.

7 is the equivalent circuit of the technological elements of the rods used in the example.

The proposed circuit Assembly of composite workpieces (1, 2) includes the following sequence of operations: (a) the formation of many technological elements(1, 2, 3, 4, 5, 6 and 7) into a single whole; b) the location of the collected beam technological elements in cilin the historical case 8; C) assembling a certain number of individual rods in the rod the correct hex form; d) alternate replacement process elements collected from rods rods.

Thus, according to the first embodiment of the replacing process elements is carried out in the following sequence: 2-3-1-4-5-6-7. In the process of Assembly in the center have a hexagonal technological element 1 of the correct form with wide faces A1, around which have three hexagonal element 2, the correct form with wide faces A2 and then the three hexagonal element 3, the width of the faces of which has four standard sizes and faces A32 and A36, as the verge A33 and A35 are equal, in all subsequent rows are assembled from the technological elements of two types: 4, where the width of the faces presented in two sizes, and faces A41, A43, A44, A46, as the verge a, A45, equal to between a, and 5, where the width of the faces are also presented in two sizes, and faces A51 motorway, A53, A55, as the verge A52, A54, A55, are equal. In conclusion, the collected beam technological elements closer to the cylindrical shape of the case due to the additional process elements 6 and 7, the form and amount of which varies depending on the number of technological elements of hexagonal shape and expect them therefore, for each case, the moving of the need to ensure maximum filling rods of free space between the surface of the cover and the last a number of technological elements. The equivalent circuit of the technological elements of the bars of the collected cores are presented in figure 2.

As seen from the figures, it is distinct sections technological elements from sections substituting bars gives the opportunity to form a compact composite billet from a variety of hexagonal rods.

Instead of hexagonal rods, you can use the rods of circular cross section (in the same amount), all calculations are made taking into account the fact that the diameter of the round rod is chosen equal to the size of turnkey corresponding hexagonal rod.

A special case of the execution of the build process elements around a Central rod, which is a design element of the composite billet presented in figure 3.

According to the second embodiment (figure 4) replacement of technological elements collected from rods rods is performed in the following sequence: 1-2-3-4-5-6-7. The replacement of the elements of the bars of the collected cores are presented in figure 5.

Rods to replace the technological elements (on any of the options) can be collected from cores made of different materials. One of the possible variants of the compositions presented on Fig.6. Usually this is done to achieve certain properties of the composite wire.

Examples of specific implementation of the program.

Figure 7 presents a multi-fiber composite preform with an outer diameter of 250 mm, collected from 4584 rods using technological replaced elements. A Central processing element had a regular hexagonal cross-section with a face value 23,36 mm, the second row was filled alternately elements, three of which had a regular hexagonal shape with a width of verge 24,19 mm, and three other element had a hexagonal shape, the width of the faces, which was equal to 24,19, 23,36, 24,99, 22,49, 24,99, 23,36 mm air space between the hexagonal technological elements and the cylindrical case filled with technological elements of two sizes, the cross section of which has a shape of segments defining the maximum filling terminals of the internal space of the case. Hexagonal technological elements were replaced by rods, each of which was collected from 271 rod (the number of terminals in the diametrical direction M was 19 pieces) with a width of verge αequal 1,445 mm, and a Central processing element is replaced with a rod made from pure copper rods. Peripheral, additional technological elements were replaced by rods, each of which contained either 284, or 209 rods. The collected composite billet was distinguished by high platnost the Assembly due to complete on all faces of a pair of rods across the section.

Similarly collected composite billet of technological elements around copper hexagon correct form, which is a design element of the composite billet.

Thus, the resulting new technical result, which is expressed in the fact that the proposed method of assembling a composite billet for manufacturing a multi-fiber wire greatly simplifies the Assembly process and allows you to get by means of a single Assembly of the workpiece with the number of terminals in excess of several thousand, with a high density of their packing.

Sources of information

1. "Physical metallurgy and technology of superconducting materials". Under the editorship of Fonera S., Schwartz B., USA, 1981; TRANS. from English. M.: metallurgy, 1987., str-254, page 317.

2. Pettier Francois, Hoang Gia Ky, Sulten Philippe Grunblatt et Gerard Procede d assemblage de billettes composites pour la fabrication de brins supraconductours multifilamentaires. No. de publication FR 2672150, no d enregistrement national 91 00795, Int C1: H 01 12/10, Date de depot 24.01.91.

1. The method of assembling a composite billet for manufacturing a multi-fiber wire, in which a cylindrical case filled with technological elements, which are then sequentially removed from the case, and deletions to replace the rods, each of which consists of individual rods, arranged in a manner that ensures the maximum density, characterized in that the cross section of each of the technologist is ical elements differs from one section of a replacement rod, a Central processing element has a regular hexagonal shape with wide faces A1, the value of which is determined from the expression

where a is the width of the hexagonal faces of the rod, M - number of terminals in the diametrical direction, the second row surrounding the Central element, filled alternately technological elements, three of which have a regular hexagonal shape with a width of verge A2 determined from the expression

and three other technological elements have a hexagonal shape, the width of which faces are consistently equal to

all subsequent rows are filled alternately technological elements having a hexagonal shape, the width of the faces of which is equal to consistently

and the remaining free space between the hexagonal technological elements and the cylindrical case filled additional process elements with formalparameter section, for maximum filling of the case.

2. The method according to claim 1, characterized in that the cylindrical case filled with technological elements around a Central rod, which is a design element of the workpiece and having a regular hexagonal shape with wide faces A1, the value of which is determined from the expression

3. The method of assembling a composite billet for manufacturing a multi-fiber wire, in which a cylindrical case filled with technological elements, which are then sequentially removed from the case, and deletions to replace the rods, each of which consists of individual rods, arranged in a specific order for maximum density, characterized in that the cross section of each of the technological elements differs from one section of a replacement rod, a Central processing element has a regular hexagonal shape with wide faces A1, the value of which is determined from the expression

where a is the width of the hexagonal faces of the rod, M - number of terminals in the diametrical direction,

second row, surrounding the Central element, alternately fill the technological elements of the hexagonal shapes of the two types, the width of the faces of each and which are consistently equal to

in each subsequent row technological elements have a hexagonal shape in two types, the width of the faces of each of them successively equal to

and the remaining free space between the hexagonal technological elements and the cylindrical case filled additional process elements with the cross-sectional shape for maximum filling of the case.



 

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