Transformer coil outlet head positioning tool

Abstract

The utility model belongs to the technical field of transformer manufacturing, and particularly relates to a transformer coil outlet end positioning tool suitable for manufacturing a large-size transformer, which comprises a fan-shaped positioning plate, the inner diameter and the outer diameter of the fan-shaped positioning plate are equal to those of a coil, and a chamfer slope is machined at the edge position of the inner side corner of the fan-shaped positioning plate. A plurality of scale marks are arranged on the upper surface of the fan-shaped positioning plate, the scale marks are radially arranged by taking the central point of the coil as a starting point, and the scale marks correspond to the coil outgoing heads in number and deviation angle; the fan-shaped positioning plates are made of hard paperboards or laminated wood; and a cotton thread is matched with a marking pen to mark scale marks on the upper surface of the fan-shaped positioning plate. The positioning tool is easy to manufacture and low in cost, multiple transformer products of the same type can repeatedly use the same tool, multiple times of line drawing is not needed in the coil winding process, positioning is accurate, and the assembling efficiency and the assembling precision of large-size transformer multi-coil outlet head positioning are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer manufacturing, and particularly relates to a positioning tooling for the coil leads of a transformer suitable for manufacturing large-sized transformers. Background Art

[0002] The positioning of the coil leads of a transformer is one of the key steps in the transformer assembly process. Especially for large-capacity and large-sized transformers, the accuracy of the coil lead positioning and the process assembly efficiency directly affect the overall performance, safety and production cycle of the transformer. The coil structure of a large-sized transformer is complex, especially for the regulating coil, the number of coil leads is large and the distribution is wide, which increases the difficulty of coil lead positioning.

[0003] Most of the coils of large-sized transformers are wound on a winding die. The inner paper tube will rotate during the winding process, and it is impossible to draw lines for coil lead positioning on the inner paper tube. Therefore, the traditional coil lead positioning method mostly adopts the method of "drawing a line for each lead", that is, taking the first coil lead as the center and positioning with the coil circumference. Because the diameter of the coil of a large-sized transformer is large, this positioning method is often inaccurate, and it is necessary to draw lines frequently, resulting in a large cumulative error, low assembly efficiency, time-consuming and laborious, and unable to meet the high-precision and high-efficiency requirements of modern power transformer manufacturing. Summary of the Invention

[0004] In view of the technical requirements for the positioning of the coil leads of large-sized transformers, the utility model provides a positioning tooling for the coil leads of a transformer. The technical solution adopted by the utility model is as follows:

[0005] The positioning tooling for the coil leads of a transformer includes a sector-shaped positioning plate. The inner and outer diameters of the sector-shaped positioning plate are equal to the inner and outer diameters of the coil. A chamfered slope is processed at the position of the inner edge of the sector-shaped positioning plate. A plurality of scale lines are arranged on the upper surface of the sector-shaped positioning plate. The scale lines are radially arranged starting from the center point of the coil, and the scale lines correspond to the number and offset angle of the coil leads.

[0006] Preferably, the material of the sector-shaped positioning plate is hard cardboard or laminated wood.

[0007] Preferably, cotton thread and a marker pen are used to mark the scale lines on the upper surface of the sector-shaped positioning plate.

[0008] Advantages of the Utility Model

[0009] The positioning tooling of the utility model is simple to manufacture and low in cost. The same tooling can be reused for multiple transformer products of the same type. During the coil winding process, it is not necessary to draw lines multiple times, and the positioning is accurate. It effectively improves the assembly efficiency and assembly accuracy of the multi-coil lead positioning of large-sized transformers, and avoids the traditional "drawing a line for each lead" positioning method. Description of the Drawings

[0010] The drawings are used to provide a further understanding of the present utility model and form a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0011] Figure 1 is a perspective view of the positioning tooling of the embodiment of the present utility model;

[0012] Figure 2 is a schematic diagram of the distribution of the leads of the large-size transformer coil in the embodiment of the present utility model;

[0013] Figure 3 is a schematic diagram of the use state of the positioning tooling of the embodiment of the present utility model;

[0014] In the figure, 1 is a sector-shaped positioning plate, 2 is a chamfered inclined surface, 3 is a first scale line, 4 is a second scale line, 5 is a third scale line, 6 is a fourth scale line, 7 is a fifth scale line, 8 is a sixth scale line, 9 is a coil, 10 is a coil lead, 11 is a winding mold, and 12 is a positioning tooling. Detailed Embodiment

[0015] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments.

[0016] As Figure 1 shown, the transformer coil lead positioning tooling includes a sector-shaped positioning plate 1. The sector-shaped positioning plate 1 is made of hard cardboard or laminated wood, and the inner and outer diameters of the sector-shaped positioning plate 1 are equal to the inner and outer diameters of the coil 9. A chamfered inclined surface 2 is processed at the inner edge position of the sector-shaped positioning plate 1. The setting of the chamfered inclined surface 2 can prevent the sector-shaped positioning plate 1 from scratching the inner layer paper coil of the coil 9 during the process of winding the coil 9. The first scale line 3, the second scale line 4, the third scale line 5, the fourth scale line 6, the fifth scale line 7, and the sixth scale line 8 are sequentially arranged on the upper surface of the sector-shaped positioning plate 1. The above scale lines are radially arranged starting from the center point of the coil 9, and the above scale lines correspond to the number and offset angle of the coil leads 10.

[0017] For the first scale line 3, the second scale line 4, the third scale line 5, the fourth scale line 6, the fifth scale line 7, and the sixth scale line 8, one end of a cotton thread can be fixed at the center of the coil 9, and the other end of the cotton thread can be rotated according to the offset angle of the coil lead 10, and the above scale lines can be sequentially marked on the upper surface of the sector-shaped positioning plate 1 with a marker pen.

[0018] As Figure 2 shown, multiple coil leads 10 need to be led out from the coil 9. AsFigure 3 As shown, during the winding process of the coil 9, at the lead end cake of the coil 9, the first scale line 3 of the sector positioning plate 1 is axially aligned with the position center of the first lead of the coil 9; then, successively according to the second scale line 4, the third scale line 5, the fourth scale line 6, the fifth scale line 7, and the sixth scale line 8 on the sector positioning plate 1, the second lead, the third lead, the fourth lead, the fifth lead, and the sixth lead of the coil 9 are bent and led out. Finally, after removing the sector positioning plate 1, the winding of the coil 9 continues. When winding to the lead end cake of the coil 9 again later, the above operations are repeated.

[0019] In the embodiments of the present utility model, the technical features not described in detail are all prior art or conventional technical means, and will not be elaborated herein.

[0020] Finally, it should be noted that: the above embodiments are only specific implementation manners of the present utility model, used to illustrate the technical solutions of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that: any person skilled in the art within the technical scope disclosed by the present utility model can modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements for some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be covered within the protection scope of the present utility model.

Claims

1. Transformer coil head positioning tooling, including a fan-shaped positioning plate, characterized in that: The inner and outer diameters of the fan-shaped positioning plate are equal to the inner and outer diameters of the coil, and the inner edges of the fan-shaped positioning plate are processed with chamfered surfaces. A plurality of scale lines are arranged on the upper surface of the fan-shaped positioning plate. The scale lines are radially arranged with the center point of the coil as the starting point, and the scale lines correspond to the number and offset angle of the coil protrusions.

2. The transformer coil lead positioning tool according to claim 1, characterized in that: The fan-shaped positioning plate is made of hardboard or laminated wood.

3. The transformer coil lead positioning tool according to claim 2, characterized in that: Use cotton thread and a marker pen to mark scale lines on the upper surface of the fan-shaped positioning plate.

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