Oval amorphous iron core positioning tool

Abstract

The utility model relates to an oval amorphous iron core positioning tool which is provided with a base plate, the two transverse sides of the base plate are respectively provided with a straight groove, the two straight grooves are the same in structure and are matched with two straight arms of an oval amorphous iron core in shape, a first U-shaped plate and a second U-shaped plate can be made of SUS304 stainless steel plates, the width of the first U-shaped plate is larger than that of the second U-shaped plate, and the width of the first U-shaped plate is larger than that of the second U-shaped plate. The width of the second U-shaped plate is located in the first U-shaped plate, the two ends of the second U-shaped plate are aligned with the two ends of the first U-shaped plate, the second U-shaped plate and the first U-shaped plate are transversely centered, the second U-shaped plate and the first U-shaped plate are fixedly connected into a whole, and the two folded edges, located on the same transverse side, of the first U-shaped plate and the second U-shaped plate form the groove walls of the straight grooves on the corresponding sides. The machining cost of the positioning tool can be greatly reduced, the machining period is greatly shortened, and the positioning tool is convenient to use.

Description

Technical Field

[0001] The utility model relates to a positioning tooling for an oval amorphous iron core. Background Art

[0002] A common manufacturing process for an oval (or runway-shaped, or race-track-shaped) amorphous iron core is to first wind a circular iron core, and then use a positioning tooling (or shaping tooling) to shape the iron core into a runway shape. After that, the iron core is sent to subsequent processes such as vacuum annealing for further treatment while being held in the shaped state by the positioning tooling.

[0003] The existing shaping (or sizing) structure in the positioning tooling for an oval amorphous iron core is a runway-shaped groove. For example, Chinese patent document CN220895335U discloses a race-track-shaped amorphous iron core shaper, a tray, a tray support, and an annealing tooling. The shaper has an annular groove structure for loading the race-track-shaped amorphous iron core to meet the requirements of shaping and placing the race-track-shaped amorphous iron core during the annealing process, and to ensure or improve the annealing effect. This kind of positioning tooling can play a good shaping role and facilitate subsequent related operations. However, the processing of the positioning tooling itself is difficult, with a long cycle and high cost. Moreover, the operation process of placing the circular iron core into the oval groove is also relatively complex, which not only increases the production cost of the iron core but also restricts the improvement of production efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a new positioning tooling for an oval amorphous iron core to reduce the tooling cost and facilitate use.

[0005] The technical solution of the utility model is as follows: A positioning tooling (or shaping tooling) for an oval amorphous iron core is provided with a substrate. On both lateral sides (corresponding to the width direction of the oval iron core) of the substrate, there is a straight groove each. The straight groove is a longitudinal through groove (a groove without plugs at both ends), and the structures (dimensions and shapes) of the two straight grooves are the same and conform to the two straight arms of the oval amorphous iron core.

[0006] Preferably, this positioning tooling for an oval amorphous iron core is made of SUS304 stainless steel. For example, it is prepared from a SUS304 stainless steel plate.

[0007] Preferably, a number of through holes are distributed on the substrate.

[0008] Preferably, a number of through holes are distributed on the groove wall and / or the groove bottom of the straight groove.

[0009] Preferably, this positioning tooling for an elliptical amorphous iron core includes a first U-shaped plate and a second U-shaped plate. The width of the first U-shaped plate is greater than that of the second U-shaped plate. The second U-shaped plate is located within the first U-shaped plate, with its two ends aligned with those of the first U-shaped plate, centered horizontally (centered horizontally within the first U-shaped plate), and fixedly connected (e.g., welded) to the first U-shaped plate to form an integral body. The two flanges (flange plates) on the same horizontal side of the first U-shaped plate and the second U-shaped plate constitute the groove walls of the straight groove on the corresponding side.

[0010] Preferably, both the first U-shaped plate and the second U-shaped plate are made of perforated plates with a number of through holes distributed thereon, or a number of through holes are distributed on both the first U-shaped plate and the second U-shaped plate. The through holes on the bottom plate of the first U-shaped plate are aligned with those on the bottom plate of the second U-shaped plate, thereby forming through holes on the substrate that penetrate the bottom plates of the mutually overlapping first U-shaped plate and the second U-shaped plate.

[0011] The beneficial effects of the present utility model are as follows: Since the groove for shaping the elliptical amorphous iron core on the positioning tooling is a straight groove, compared with the existing elliptical groove, the processing technology of this straight groove is very simple. As a result, the processing cycle of the positioning tooling is significantly reduced, the processing cost of the positioning tooling is significantly lowered, and the process difficulty is also significantly reduced. The processing equipment is significantly simplified, and the production investment can be reduced by more than 80%. At the same time, it helps to avoid and reduce the possible damage to the amorphous iron core during the embedding process, ensuring product quality; it helps to facilitate the clamping on the amorphous iron core, reduce the operation difficulty, shorten the operation time, and improve the production efficiency of the amorphous iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic view (front view) of the present utility model;

[0013] Figure 2 is a schematic view (top view) of the present utility model in the use state (loaded with an elliptical amorphous iron core);

[0014] Figure 3 is a schematic view (top view) of the shape and dimensions of the elliptical amorphous iron core related to the present utility model;

[0015] Figure 4 is a schematic view (side view) of the shape and dimensions of the elliptical amorphous iron core related to the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] See Figure 3 and Figure 4, The elliptical amorphous iron core is in the shape of a racetrack-shaped ring (the top view is similar to a racetrack), with a rectangular cross-section. Each end is a semi-circular ring (half of the circular ring), and the middle part consists of two straight arms that connect the corresponding ends of the two semi-circular rings respectively. The thickness and height of each part can be considered the same.

[0017] The length of the straight arm can be represented by the symbol C; the width can be represented by the symbol D; the height can be represented by the symbol H; the outer diameter (outer peripheral diameter) of the semi-circular ring is equal to the distance between the outer edges (outer sides) of the two straight arms, which can be considered the width of the elliptical amorphous iron core and can be represented by the symbol B; the distance between the endpoints of the two semi-circular rings (in the longitudinal direction) can be considered the length of the elliptical amorphous iron core, equal to the outer diameter of the semi-circular ring plus the length of the straight arm, and can be represented by the symbol A; the outer (outer edge / outer side) perimeter (total length) of the elliptical iron core is πB + 2C, and the inner (inner edge / inner side) perimeter is π(B - 2D) + 2C.

[0018] According to the width D, length C, height H of the two straight arms of the elliptical iron core and their relative positions (for example, the distance B between the outer edges of the two straight arms, or the distance B - 2D between the inner edges of the two straight arms, or the distance B - D between the lateral midpoints of the two straight arms), etc., determine the relevant dimensions of the positioning tooling for the elliptical amorphous iron core (referred to as the positioning tooling) so that the two straight arms of the elliptical amorphous iron core can exactly fit into (or be snapped into) the two straight grooves of the positioning tooling, that is, the two straight grooves of the positioning tooling conform to the two straight arms of the elliptical amorphous iron core. Therefore, in the design of the positioning tooling, the distance between the two straight grooves in the positioning tooling (which can be the distance between the midpoints in the transverse direction / the distance between the vertical planes passing through the midpoints) can be made the same as the distance between the two straight arms (which can be the distance between the midpoints in the transverse direction / the distance between the vertical planes passing through the midpoints), the length C1 of the straight groove is the same as the length C of the straight arm of the iron core, and the width D1 and depth (or height) H1 of the straight groove are respectively equal to the width D and height H of the straight arm of the iron core. According to the process requirements, based on considering the assembly clearance (the clearance required by the assembly process), the width D1 of the straight groove can be determined according to the width D of the straight arm, that is, the width D1 of the straight groove is the sum of the width D of the straight arm and the assembly clearance, while keeping the distance between the two straight grooves (the distance between the midpoints in the transverse direction) equal to the distance between the two straight arms (the distance between the midpoints in the transverse direction). The specific assembly clearance can be zero or non-zero according to the actual process requirements. For the convenience of expression, in this case, it is still said that the width D1 of the straight groove is equal to the width D of the straight arm of the iron core.

[0019] Two steel plates of appropriate sizes (for example, SUS304 stainless steel plates with a thickness of 2 mm) can have 90° flanges formed at both ends, forming two U-shaped plates (or U-shaped grooves), one wide and one narrow. Place the narrow U-shaped plate 23 inside the wide U-shaped plate 22, align the two ends (longitudinally) and center them left and right (transversely), and fix and weld them into one body to form the positioning tooling of the present utility model. The flanges on the same side (transversely the same side) of the two U-shaped plates constitute the two side walls of the corresponding straight groove on that side. The sizes of these two steel plates (for example, the blanking sizes of the two steel plates) or the sizes of these two U-shaped plates can be determined according to the design of the positioning tooling (each relevant design dimension) and the characteristics of the preparation process (for example, the pressure forming process of the U-shaped plates).

[0020] This kind of sizing tooling can be prepared in the aforementioned manner using any suitable metal plate such as a SUS304 stainless steel plate with a thickness of 2 mm, or can also be prepared using any other suitable materials and / or any other suitable processing and preparation methods. Through experiments, the sizing tooling prepared in the above manner using a 2 mm SUS304 stainless steel plate is suitable for the preparation of racetrack-shaped amorphous cores under various common specifications / uses in power / transmission and distribution equipment. In practice, plates of appropriate thickness can be selected according to actual needs.

[0021] Since there is no carburization phenomenon in the high-temperature vacuum annealing of SUS304 stainless steel material, using SUS304 stainless steel or other materials with similar characteristics will not have an adverse impact on the performance of the amorphous core.

[0022] According to actual needs, through holes can be provided at any appropriate part of the positioning tooling to facilitate heat conduction and temperature balance in the subsequent annealing process.

[0023] The preparation process of the oval amorphous core involved in this kind of positioning tooling is mainly as follows: According to the design of the oval amorphous core, a circular amorphous core is wound on a winding machine. The inner circumference, height, and width (number of layers) of this circular amorphous core are the same as those of the designed oval amorphous core. With the cooperation of a press, the sizing tooling is clamped on the circular core, and the two parts of the core located outside the two ends of the two straight grooves of the positioning tooling should be the same. Under the action of the press, the circular core gradually deforms into an oval shape before being clamped into the positioning tooling (during the operation process). After being clamped into the positioning tooling, the oval shape is kept unchanged under the action of the positioning tooling. The core clamped into the positioning tooling and the positioning tooling are sent into a vacuum annealing furnace for vacuum annealing together. After the vacuum annealing operation, the core with the positioning tooling is placed on a curing workbench, and special curing glue is evenly applied to the end face of the core exposed from the straight groove. After the applied glue is completely cured, the sizing tooling is removed, the other end face of the core is turned upward and cured glue is applied, and after the cured glue is completely cured, surface treatment is carried out to remove the excess glue on the surface, and insulating paper is wound, thus completing the production of the core.

[0024] Experiments have proved that based on the characteristics of the amorphous iron core, after squeezing and deforming the circular iron core from both ends of any diameter and clamping it into the positioning tooling, and making the two points corresponding to this diameter be respectively located at the longitudinal midpoints of the two straight grooves of the positioning tooling, it will be shaped into the required ellipse.

[0025] For each of the preferred and optional technical means disclosed in the present utility model, except as otherwise specified and when one preferred or optional technical means further limits another technical means, they can be combined arbitrarily to form several different specific embodiments.

Claims

1. Oval-shaped amorphous iron core positioning tooling, characterized in that A substrate is provided, and a straight groove is provided on each of the two lateral sides of the substrate. The two straight grooves have the same structure and are conformable to the two straight arms of the elliptical amorphous iron core.

2. The positioning tooling for the elliptical amorphous iron core according to claim 1, characterized in that It is made of SUS304 stainless steel.

3. The positioning tooling for the elliptical amorphous iron core according to claim 1, characterized in that A number of through holes are distributed on the substrate.

4. The positioning tooling for the elliptical amorphous iron core according to claim 1, wherein A number of through holes are distributed on the groove wall and / or the groove bottom of the straight groove.

5. The positioning tooling for the elliptical amorphous iron core according to any one of claims 1-4, characterized in that It includes a first U-shaped plate and a second U-shaped plate. The width of the first U-shaped plate is greater than that of the second U-shaped plate. The width of the second U-shaped plate is located inside the first U-shaped plate, and the two ends are aligned with the two ends of the first U-shaped plate, centered horizontally, and fixedly connected to the first U-shaped plate as a whole. The two folded edges on the same lateral side of the first U-shaped plate and the second U-shaped plate form the groove wall of the straight groove on the corresponding side.

6. The positioning tooling for the elliptical amorphous iron core according to claim 5, characterized in that Both the first U-shaped plate and the second U-shaped plate are made of perforated plates with a number of through holes distributed thereon, or a number of through holes are distributed on both the first U-shaped plate and the second U-shaped plate. The through holes on the bottom plate of the first U-shaped plate and the through holes on the bottom plate of the second U-shaped plate are aligned with each other, thereby forming the through holes on the substrate that penetrate the bottom plates of the mutually overlapping first U-shaped plate and the second U-shaped plate.

Images