SI20600A - Process for manufacturing composite lamella packages of detachable type for voltage cores of inductive power meters from partial lamella packages - Google Patents

Abstract

The yoke lamella (11) located in the same level of the lamellar core package (5) for the lamellar partial yoke package (51), and the pole lamella (12) for the lamellar partial pole package (52) are always manufactured by partial cuts. In its central leg (112) of the yoke lamella (11) sector, two parallel single separation partial cuts (1, 1') are performed, which are almost symmetrical to the longitudinal axis of this leg (112) and approximately parallel to the lamella. Together with the partial cuts (b, c2, c2') they separate the central leg (112) from the pole lamella (12). Subsequently, the central leg (112) is shortened by partial cuts (c1, c1'), which on one side and the other of the single separating partial cuts (a, a') are leading approximately at a right angle against it and in the extension of each other. Between the lamellar partial packages (51, 52) of the yoke or pole, which are made according to an improved process, they provide a good mechanical and a timely stable magnetic contact, the pressing and extracting force do not change with the increase in the number of prints.

Description

A process for making a separately assembled laminated package for a voltage core of an induction electric meter from laminated partial packages

The invention relates to a method according to the introductory part of the first claim for the manufacture of a separately assembled laminated package for a voltage core of an induction electric meter from laminated partial packages, such as a laminated partial yoke package and a laminated pole partial package.

According to the international patent classification, the invention is classified in classes H 01F 3/02 and G 01R 11/06.

It is an object of the invention to propose an improvement of the method described above for the manufacture of a separately assembled laminated package for a voltage core of an induction electric meter, in order to achieve such mutual matching of the laminated partial yoke and pole packages so that the printing force and the pulling force can be determined in advance and retained their value in repeated repetition of these two operations.

A laminated package for a voltage core of an induction electric meter is typically separated separately by at least two laminated part packages: a laminated part yoke part package and a laminated part pole part package. Assembled in a laminated nuclear package, they must form a stable magnetic circuit, the properties of which must not change over the life of the electric meter.

DE 39 02 621 Al describes a process for making a separately assembled laminated package for a voltage core of an induction electric meter from two or more partial packages. Following this procedure, in the same plane, the lamellae for partial packages of the nuclear package are made in common working steps. In further working steps, care is taken to ensure that the slats in the same plane remain aligned with one another until they are folded into a complete nuclear package at a predetermined folding location. In this case, the folding location of the partial packages is defined by one or more common and outline identical punctuation points in each louver. Each time, the separate partial lamellae are then folded into each other in separate places, in part packages of the required thickness, as well as mechanically interconnected. Finally, the partial packages at their former punctuation points are precisely self-sealingly folded into the nuclear package, which is used as a single piece. In the case of a laminated package made according to the procedure described above, for the voltage core of an electrical meter, large differences between the printing force and the pulling force occur during assembly and disassembly, and they also change with the repeated printing and drawing. Particularly in the case where a slight wedge is used in the area of matching parts of the laminated part packages, mechanical loads occur in the lamellated nuclear package, which can eventually cause instability of the magnetic properties in the voltage core of the electric meter.

Technical solutions (DE 10 21 473 and DE 75 10 116) are also known, in which the matching of laminated yoke and pole packages is carried out with additional fasteners. Both the assembly and the separation of laminated partial packages require very demanding special tools, which makes the solution more expensive and the issue of how to perform surface protection at the location of the laminated partial packages is not resolved.

This task is solved by the process of making a separately assembled lamellar package for a voltage core of an induction electric meter from laminated partial packages, such as a laminated partial yoke package and a laminated partial pole package, according to which, in the same plane of the laminated nuclear package, there is a yoke lamella The yoke partial packet and the pole lamellae for the laminated partial yoke package are each made by partial cuts, between which, in the middle arm of the yoke plate area, are approximately symmetrically longitudinally parallel to the longitudinal axis of this arm, with a single longitudinal, single-split partial cut. a transverse partial cut connects them to the area of the pole flap and from which the transverse pole cuts are made each time to the edge of the middle arm, and the yoke flap and pole pole from any plane of the two laminated partial packages remain aligned with each other their work steps, among them

- step of stacking both yoke blades in the laminated yoke partial package and the pole lamella into the laminated partial yoke package each with the required thickness and along the points of single punctuation cuts as two of the yoke disconnection points from the pole lamella

- and the step of assembling the laminated yoke partial package and the laminated pole partial package to the lamella exactly into the laminated nuclear package each time along the sites of single separating partial incisions, wherein the method of the invention is characterized by the fact that the middle limb is shortened by partial incisions in one and the other sides of single punctuation cuts extend approximately perpendicularly to them and in extension to each other.

The method according to the invention is further characterized in that the single separating partial cuts have a length which is determined by the printing force and the pulling force when assembling or disassembling a laminated nuclear package.

Further features of the invention are apparent from claims 3 to 5.

The invention provides an improved process for the manufacture of a detachably assembled lamellar pack for a voltage core of an induction electric meter from lamellar partial packs allowing good mechanical and magnetic contact to be made without the influence of manufacturing tolerances and additional influencing factors that otherwise occur with tool wear. The matching design ensures solid mechanical seating and good magnetic contact of the laminated partial packages in the longitudinal and transverse directions of the packages. The print and pull force do not change with the number of prints.

The invention will now be further explained in detail based on the description of the embodiment and the accompanying plan showing in FIG. 1 is a yoke and pole blade separated from each other by partial cuts in the middle arm area of the yoke blade and from the lateral contact slit; FIG. 2 is a detail view of the central separation area of the yoke and pole blade of FIG. 1, FIG. 3 shows a separately assembled lamellar package according to the method of the invention for a voltage core of an induction electric meter from laminated partial yoke and pole packages, FIG. 4 is a graph of the printing force of a laminated partial packet of a pole on a laminated partial packet of a yoke, depending on the mutual movement of said laminated partial packets in the first printing and subsequent prints, and the like; 5 as in FIG. 4 for the draw force.

The lamellar packet 5 for the voltage core of an induction electric meter is separately composed of laminated partial packets, such as the laminated partial packet 51 of the yoke and the laminated partial packet 52 of the pole (Fig. 3).

Each time in the same plane of the laminated nuclear package 5, the yoke lamella 11 for the laminated partial packet 51 yoke and the lamella 12 pole for the laminated partial packet 52 poles are constructed in such a way (Fig. 1) that, following the proposed improved partial cut procedure, they are separated from each other by others (Fig. 2). For high-quality mechanical and magnetic contact in area B of laminated part packages 51, 52 yoke or pole, partial cuts in area A of lamellae 11, 12 yoke or pole in each level of laminated part packages 51 or 52 separately (Figs. 1 and 3) are important.

The yoke lamella 11 and the pole 12 lamellae from any plane of the two laminated part packages 51 and 52, respectively, remain aligned with each other during all subsequent work steps. Thus, the yoke lamellae 11 are stacked together in a laminated yoke partial packet 51 and the pole lamellae 12 are stacked together in a laminated yoke partial packet 52 each with the required thickness and along the points in the following single separating partial cuts a, a 'as two from the points of separation of the lamella 11 yoke from the lamella 12 pole. Further, the laminated yoke partial packet 51 and the laminated pole partial packet 52 are precisely assembled into laminated nuclear packet 5 each along the locations of said single separating partial cuts a, a '.

In a known manner, in the middle arm 112 of the area of the yoke lamina 11, preferably approximately symmetrically along the longitudinal axis of this arm 112 and about said parallel parallel single separating partial cuts a, a ' are approximately equal in length to the predetermined length of the invention. Their transverse partial cut b connects them from the region of the lamella 12 of the half-spaced end b. From them towards the region of the lamella 12 of the pole facing ends, partial cuts c2, c2 'are made transversely to them and each time to the edge of the middle arm 112. The middle arm 112 of the yoke 11 blade and the pole 12 blade are thus separated from one another.

According to the invention, thereafter, partial cuts cl, cl 'are made on one and the other sides of the single separating partial cuts a, a' approximately perpendicular to them and in extension of each other, thereby shortening the middle arm 112 by the length u. In the case of reassembled partial lamellae 11 and 12, respectively, the gaps c, c 'are in the middle arm extension.

With partial cuts a, b, a ', an outgrowth 121 of the pole 12 of the pole is formed and the corresponding cut in the middle arm 112 of the yoke 11 of the yoke.

According to a preferred embodiment of the method of the invention, a cutout d is made in the region of the middle arm 112 in the extension of the outgrowth 121 of the pole blade 12. The notch d therefore connects those ends of the single separating partial cuts a, a 'which are offset from the region of the lamella 12 of the pole, and is made with the already mentioned partial cut b, the parallel partial cut bi and with the partial cuts b3, b3', which extend substantially in the direction of the longitudinal axis of the middle arm 112 at a distance slightly exceeding the distance between the single separating partial cuts a, a '. The length in the cutout d, that is, the distance between the partial cuts b and bi, is preferably smaller than the length u, for which the middle section 112 of the yoke lamella 11 has been shortened by the partial cuts cl, cl '.

The lamellar nuclear package 5 is assembled by printing the lamellar pack 52 of the pole onto the middle arm 512 of the lamellar yoke package 51. In this case, the outgrowths 121 of all the lamellae 12 of the pole project into the corresponding cutout of the middle arm 512 of the laminated yoke package 51. Around the pin 521, there is a gap between the end of the middle arm 512 of the yoke package and the package 52 of the pole width u ', which depends on the length u of the shortening of the middle arm 112 and the length in the cutout d. Mechanical connection of lamellar packages 51, 52 enables their high quality magnetic contact.

The lateral magnetic contacts of the laminated partial pack 52 of the pole with the lateral arms 511 ', 511 "of the laminated partial pack 51 of the yoke are made with well-defined planar parallel slots 6' and 6", which arise from the notches 2 ', 2' in all lamellae at the transitions from the area lamellae 12 poles on one side and the other in the area of the lateral arms 111 ', 111' of the lamella 11 yoke.

According to the described procedure, the lamellar package 5 for the voltage core of the electrical meter has stable magnetic properties.

Assembling the lamellar nuclear package 5 requires the printing force Fa and the disassembly force Fd. Their dependence on the displacement x of the lamellar part packages 51 and 52 is shown in graphs in Figs. 4 or FIG. 5.

The initial force Fa ° during the first assembly - these forces are shown for two different lamellar packages 5 cores - begins to increase when the lamellar partial packages 51, 52 are positioned relative to each other (point I in Fig. 4). The aforementioned Fa ° printing force, as well as the Fa printing force at repeated assemblies - this printing force is shown for several assemblies of the same 5 kernel package - increases linearly from point II to point III, ie at a distance corresponding to the sliding of the plug 521 along the edges of the blades 11 in the cutout formed by partial cuts a, a '. After the face of plug 521 has reached the cutout area d, the printing force Fa ° begins to decrease and the printing force Fa increases more slowly. Both forces Fa °, Fa rise sharply as the forehead of the stud 521 sits at the end of the cutout area d.

The Fa ° force has the same course for different 5 kernel laminate packages, and the Fa force has the same course for repeated repetitions of the same 5 kernel laminate package. The same applies to the corresponding pulling forces Fd ° and Fd. Their size at point III 'is defined by the length of the single punctuation cuts a, a'. The pull force falls approximately linearly to the final pull (point II ').

The length of single separating partial cuts a, a 'is determined by the predicted print force size Fa °, Fa and the projected pull-out size Fd °, Fd when assembling or disassembling a lamellar nuclear package 5. The length of said forces is also affected by the length u, for which after separation from the lamella 12 pole, the middle arm 112 was shortened.

Claims (5)

Patent claims A method for making a separately assembled laminated package (5) for a voltage core of an induction electric meter from laminated partial packages, such as a laminated yoke partial package (51) and a laminated pole partial package (52), in which the laminated nuclear package is in the same plane (5) located lamella (11) yoke for laminated partial package (51) yoke and lamella (12) poles for laminated partial package (52) poles are each made with partial cuts, between which, in the middle arm (112), the regions of the lamella (112) 11) the yoke approximately symmetrically along the longitudinal axis of this leg (112) and about parallel to it make approximately equally long, one-to-one separating partial cuts (a, a '), whose transverse partial incision connects them from the region of the lamella (12) to the half-spaced end (b) and of which a transverse partial cut (c2, c2 ') is made each time to the edge of the middle arm (112) against the area of the lamella (12) of the pole of the facing ends, and the yoke and lamella (11) of the yoke and pole (12) of any fees for two laminated partial packages (51 oz. 52) remain aligned with each other during further work steps, including - step of stacking both yoke blades (11) in laminated partial pack (51) yoke and pole lamella (12) into laminated partial bundle (52) each time with required thickness and along the points of single separating partial cuts (a, a ' ) as two of the points of separation of the lamella (11) of the yoke from the lamella (12) of the pole and - the step of assembling the laminated yoke part package (51) and the laminated part package (52) pole to the lamella exactly into the laminated nuclear package (5) each along the points of single separation partial cuts (a, a '), characterized in that the middle arm (112) shorten by partial cuts (cl, el ') extending approximately perpendicularly to them and extending one another on one and the other side of the single separating partial cuts (a, a'). A method according to claim 1, characterized in that the single separating partial cuts (a, a ') have a length which is determined by the printing force Fa and the pulling force Fd when assembling or disassembling the laminated nuclear package (5). A method according to claim 2, characterized in that the length of the middle arm shortening (112) with partial cuts (cl, cl ') is determined by the printing force Fa and the pulling force Fd when assembling or disassembling the laminated nuclear package (5). A method according to claim 3, characterized in that a cut (d) is made in the area of the middle arm (112) connecting away from the area of the pole lamella (12) facing the ends of said single separating partial cuts (a, a '). consisting of a partial cut (b) connecting said ends of single separating partial cuts (a, a '), a parallel partial cut (bi) and a partial cut (b3, b3'), predominantly in the longitudinal axis of the middle arm ( 112) run at a distance of a little bit beyond the distance between the single separating part cuts (a, a '). Method according to claim 4, characterized in that in the cut (d), the distance between the partial cut (b) connecting the ends of the single separating partial cuts (a, a ') and its parallel partial cut (bi) is less than lengths of shortening of the middle limb (112) with partial cuts (cl, el ').