Auxiliary annular coil mold pressing tool assembly

Abstract

The utility model discloses an auxiliary annular coil mould pressing tool assembly which comprises a mould core, a clamping hoop and a clamping plate, the mould core is of an annular structure formed by splicing and combining four inclined wedge bodies and is arranged on the inner side of a coil, the outer diameter of the mould core is equal to the inner diameter of the required size of the coil, and a seam between any two adjacent inclined wedge bodies is an inclined plane forming the same included angle with the axial direction; the clamping hoop is of an annular structure formed by splicing and combining four clamping hoop bodies and is arranged on the outer side of the coil, the inner diameter of the clamping hoop is equal to the outer diameter of the required size of the coil, connecting arms are arranged on the connecting portions of the clamping hoop bodies, and any two adjacent clamping hoop bodies are connected and fixed through fasteners penetrating through the connecting arms. The clamping plates comprise the lower clamping plate and the upper clamping plate, the lower clamping plate and the upper clamping plate are arranged on the two sides of the coil provided with the mold core and the clamping hoop respectively, and connecting screw holes are formed in the corresponding positions of the four corners of the lower clamping plate and the upper clamping plate for fixing. The utility model provides an auxiliary annular coil mould pressing tool assembly which can achieve shaping of an annular coil.

Description

Technical Field

[0001] The utility model relates to an auxiliary annular coil molding tool assembly for the field of coil production. Background Art

[0002] After the coil is wound and cured, the coil insulation layer needs to be bandaged. To ensure that the size of the coil reaches the product design requirements after winding the ground insulation layer, the coil needs to be molded and shaped. The existing stator coil molding tools are only used for rectangular coils and cannot be applied to the shaping of annular coils. There is no specific shaping process plan for the annular coil and the main insulation curing process. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an auxiliary annular coil molding tool assembly that can realize the shaping of annular coils.

[0004] A technical solution to achieve the above purpose is: an auxiliary annular coil molding tool assembly, including a mold core, a clamp and a clamping plate;

[0005] The mold core is formed by splicing and combining 4 wedge blocks to form an annular structure, which is arranged inside the coil. The outer diameter of the mold core is equal to the inner diameter of the coil required size. The joint between any two adjacent wedge blocks is an inclined plane with the same angle with the axis;

[0006] The clamp is formed by splicing and combining 4 clamp bodies to form an annular structure, which is arranged outside the coil. The inner diameter of the clamp is equal to the outer diameter of the coil required size. A connecting arm is arranged at the connecting part of the clamp body. Any two adjacent clamp bodies are connected and fixed to each other through fasteners passing through the connecting arm;

[0007] The clamping plate includes a lower clamping plate and an upper clamping plate. The lower clamping plate and the upper clamping plate are respectively arranged on both sides of the coil installed with the mold core and the clamp. Connecting screw holes are opened at the corresponding positions of the four corners of the lower clamping plate and the upper clamping plate, and are locked and fixed through long bolts and nuts passing through the connecting screw holes.

[0008] Further, the joint between any two adjacent wedge blocks is an inclined plane with an angle of 10° with the axis.

[0009] Further, a lifting hole is opened on the end face of the wedge block, and the lifting lug is detachably installed in the lifting hole.

[0010] Further, a bakelite board is padded between the mold core and the coil.

[0011] Further, a square notch for holding and rotating is opened in the middle of the long bolt.

[0012] Further, a lifting hole is arranged on the upper clamping plate.

[0013] Further, a foot pad is provided at the bottom of the lower clamping plate.

[0014] The core of an auxiliary annular coil molding tool assembly of the present utility model adopts a four-piece structure composed of wedge blocks, which reduces the weight of a single lifting and is convenient for lifting; the core adopts a circular ring structure and fits the inner circle of the coil; when subjected to the pressure of a press, the core is expanded outward through the transmission of the inclined plane force at the joint of the wedge blocks, and the outer diameter of the core reaches the designed inner diameter size of the coil to limit the inner diameter of the coil; at the same time, the height of the core after being completely flattened is close to the designed height of the coil, and the coil is flattened along with the core, and its height is also limited within the designed requirements by the core; after pressing is completed, the inclined plane cooperation facilitates the removal of the tightly pressed core. The clamp band adopts a four-piece structure, which is more likely to fit the outer surface of the coil and has a greater fixing force; the outer diameter size of the coil is controlled through the cooperation with bolts and nuts, which improves the installation speed and is convenient for installation; the upper and lower parts are fixed by clamping plates, so that the core and the clamp band are evenly stressed, ensuring that the cores can reach the same height after pressing and playing a role in limiting the inner diameter and height of the coil; there is a square notch in the middle of the screw rod for fixing the upper and lower clamping plates, which is convenient for tightening the screw rod. The present utility model can realize the reliable and efficient shaping of the annular coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the core of an auxiliary annular coil molding tool assembly of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the clamp band of an auxiliary annular coil molding tool assembly of the present utility model;

[0017] Figure 3 It is a schematic structural diagram of the clamping plate of an auxiliary annular coil molding tool assembly of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to better understand the technical solution of the present utility model, the following is a detailed description through specific embodiments:

[0019] Please refer to Figures 1 to 3 , an auxiliary annular coil molding tool assembly of the present utility model includes a core 3, a clamp band 4 and a clamping plate 5.

[0020] The core 3 is formed into a ring structure by splicing and combining 4 wedge blocks, and is arranged inside the coil. The outer diameter of the core 3 is equal to the inner diameter of the required size of the coil. The joint 31 between any two adjacent wedge blocks is an inclined plane with the same angle a with the axis. Preferably, the angle a is 10°. The angle a causes an oblique force to be generated at the joint of the wedge blocks, and the transmission of this force causes the core to expand outward to limit the inner diameter of the coil.

[0021] The clamp is formed by splicing 4 clamp bodies to form an annular structure, which is arranged on the outer side of the coil. The inner diameter of the clamp 4 is equal to the outer diameter of the required size of the coil. The connecting part 41 of the clamp body is provided with a connecting arm 42, on which a bolt through-hole is opened. Any two adjacent clamp bodies are connected and fixed to each other by fasteners passing through the bolt through-holes, so as to limit the outer diameter size of the coil. Originally, a two-piece structure clamp was planned to be used on the outer side of the coil to limit the size. The designed inner diameter of the clamp is slightly larger than the designed outer diameter of the coil. During the actual manufacturing process, the actual outer diameter size of the coil after being wrapped with insulation is quite different from the designed size. After the two-piece clamp is installed on the outer circle of the coil, it cannot be tightened and closed with bolts and nuts, and its inner diameter cannot reach the design requirements. Therefore, the clamp is changed to a four-piece structure. Use a lifting sling to place the four clamp bodies on the outer circle of the coil respectively, and tighten the connecting arms of the two-by-two clamps with bolts and nuts. During the pressing process, the coil expands outward under the influence of the mold core, and the clamp can limit its outer diameter size.

[0022] The clamping plate 5 includes a lower clamping plate and an upper clamping plate. The lower clamping plate and the upper clamping plate are respectively arranged on both sides of the coil installed with the mold core and the clamp. The lower clamping plate and the upper clamping plate are provided with connecting screw holes 51 at corresponding positions at the four corners, and are locked and fixed by long bolts and nuts passing through the connecting screw holes.

[0023] Finally, use a press to press the clamping plate with the coil, so that all four wedge blocks of the mold core are completely pressed to the bottom.

[0024] In one embodiment, a lifting sling hole is opened on the end face of the wedge block, and the lifting sling is detachably installed in the lifting sling hole. When the installation of the wedge block is required, screw the lifting sling into the lifting sling hole for hoisting operations. Use a crane and the lifting sling to lift the wedge block of a quarter of the mold core and place it inside the coil. When placing the mold core, pad a phenolic board between the mold core and the coil to prevent the coil from being damaged during the hoisting process. Place the three connected wedge blocks in sequence, and then hoist the fourth wedge block to assemble into a whole-round mold core.

[0025] In one embodiment, a square notch for holding and rotating is opened in the middle of the long bolt. During the pressing process, continuously tighten the four long bolts for fixing the upper and lower clamping plates to prevent the coil from restoring after the pressure is removed and ensure that the coil size meets the requirements. A lifting hole is provided on the upper clamping plate for easy hoisting. Pad feet are provided at the bottom of the lower clamping plate for easy placement on the press.

[0026] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as it is within the scope of the essential spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. An auxiliary toroidal coil molding tool assembly, comprising a mold core, a clamp and a clamp, characterized in that: The mold core is a ring-shaped structure formed by splicing and combining four inclined wedges, which is arranged on the inner side of the coil. The outer diameter of the mold core is equal to the inner diameter of the required size of the coil, and the joint between any two adjacent inclined wedges is an inclined surface with the same angle with the axial direction. The clamp is composed of four clamp bodies spliced ​​together to form an annular structure, which is arranged on the outside of the coil. The inner diameter of the clamp is equal to the outer diameter of the required size of the coil. The connecting part of the clamp body is provided with a connecting arm. Any two adjacent clamp bodies are connected and fixed to each other by fasteners passing through the connecting arm. The clamp includes a lower clamp and an upper clamp, which are respectively arranged on both sides of the coil with the mold core and the clamp installed. The lower clamp and the upper clamp are provided with connecting screw holes at corresponding positions at the four corners, and are locked and fixed by long bolts and nuts passing through the connecting screw holes.

2. The auxiliary toroidal coil molding tool assembly according to claim 1, characterized in that: The angle between the joints of any two adjacent inclined wedges and the axial direction is 10°.

3. The auxiliary toroidal coil molding tool assembly according to claim 1, characterized in that: A lifting hole is provided on the end surface of the inclined wedge, and the lifting hook is detachably installed in the lifting hole.

4. The auxiliary toroidal coil molding tool assembly according to claim 1, characterized in that: A bakelite board is provided between the mold core and the coil.

5. The auxiliary toroidal coil molding tool assembly according to claim 1, characterized in that: A square notch is provided in the middle of the long bolt for holding and rotating.

6. The auxiliary toroidal coil molding tool assembly according to claim 1, characterized in that: The upper clamping plate is provided with a lifting hole.

7. The auxiliary toroidal coil molding tool assembly according to claim 1, characterized in that: The bottom of the lower splint is provided with a pad foot.

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