A primary coil forming device and forming process based on copper strip

Abstract

The present invention discloses a primary coil forming device and a forming process based on copper strip, belonging to the technical field of transformers. It is characterized in that the primary coil forming device based on copper strip at least includes: a winding mandrel for bending the copper strip and then winding the primary coil; a punching mechanism for punching holes in the primary coil; a hydraulic mechanism for inserting a positioning pin into the primary terminal hole, connecting the copper pin to the primary terminal and the primary coil, and then completing the crimping process of the primary coil and the copper pin. The winding mandrel includes a supporting frame and a mandrel body. Among them: the left end face of the mandrel body is connected to the supporting frame; a horizontally arranged jack is provided on the right end face of the mandrel body; an insertion plate is arranged in the jack. By adopting the above technical solution, the present invention organically combines the primary winding, punching, and hydraulic operations, and can complete all the processing processes of the target product.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformers, and particularly relates to a primary coil forming device and a forming process based on copper strips. Background Art

[0002] As is well known, the winding of the input power supply of a transformer is called the primary coil, also known as the primary winding; in the traditional forming process: the hydraulic process of copper core flexible stranded wire and primary terminals. The copper core flexible stranded wire is not a standard part and needs to be specially customized, with a long procurement cycle and high cost; before using the flexible stranded wire, workers need to perform secondary processing. After cutting the flexible stranded wire with a suitable length, the insulating protective layer needs to be stripped, resulting in high labor costs; the material utilization rate is low, and there is a waste phenomenon. Summary of the Invention

[0003] The purpose of the present invention is to provide a primary coil forming device and a forming process based on copper strips to solve the above problems, which organically combines primary winding, punching, and hydraulic work, and can complete all the processing processes of the target product.

[0004] The present invention achieves the above purpose through the following technical solutions:

[0005] The first object of the present invention is to provide a primary coil forming device based on copper strips, which at least includes:

[0006] A winding die (1) for bending the copper strip and then winding the primary coil;

[0007] A punching mechanism (2) for punching the primary coil;

[0008] A hydraulic mechanism (3) for inserting a positioning pin into the primary terminal hole, connecting the copper pin to the primary terminal and the primary coil, and then completing the crimping process of the primary coil and the copper pin.

[0009] Preferably: the winding die (1) includes a support frame (1-1) and a die body (1-5); wherein: the left end face of the die body (1-5) is connected to the support frame (1-3); a horizontal jack is provided on the right end face of the die body (1-5); and an insertion plate (1-4) is arranged in the jack.

[0010] Preferably: the die body (1-5) is composed of two identical plate members; the lower end faces of the plate members are fixed on the upper surface of the support frame (1-1), and a bent portion is provided at the upper end of each plate member and bent inward; the two plate members form a horizontal channel for accommodating the secondary coil (1-2).

[0011] Preferably: adjustment holes are provided horizontally on the support frame (1-3); the left end face of the plate member is connected to the support frame (1-3) through a connecting member and the adjustment holes.

[0012] Preferably, the punching mechanism (2) includes a carrier plate (2-1), on which a punching tooling (2-2) and a shaft mounting sleeve (2-3) are provided. The bench drill is connected to the carrier plate (2-1) through the shaft mounting sleeve (2-3). A horizontal socket for inserting a copper strip is provided on the side wall of the punching tooling (2-2); a vertical through hole communicating with the horizontal socket is provided on the upper surface of the punching tooling (2-2).

[0013] Preferably, the hydraulic mechanism (3) includes a base (3-1), on the upper surface of which a rectangular slot (3-2) for inserting a primary terminal is provided; the slot (3-2) communicates with at least one side surface of the base (3-1); at least one pin hole perpendicular to the slot (3-2) is provided on the side surface of the base (3-1); the primary terminal (5) is connected to the base (3-1) through the pin hole by a positioning pin (3-3); the copper strip (6) connects the copper strip (4) and the primary terminal (5) through the through holes on the copper strip (4) and the through holes of the primary terminal (5).

[0014] Preferably, the punching mechanism (2) is located between the winding tool (1) and the hydraulic mechanism (3).

[0015] The second object of the present invention is to provide a forming process of a primary coil forming device based on a copper strip, including the following steps:

[0016] S1. Bend the copper strip (4) into a square shape using the winding tool (1).

[0017] S2. Punch holes on both sides of the upper surface of the square-shaped copper strip (4) using the punching mechanism (2).

[0018] S3. Press the primary terminal (5) at the through holes on the upper surface of the square-shaped copper strip (4), and perform pressing using the hydraulic mechanism (3).

[0019] The beneficial effects of the present invention are:

[0020] By adopting the above technical solutions, the present invention can sequentially complete the primary winding, punching, and hydraulic processes of the copper strip. The whole solution has a reasonable structure and strong operability, which can greatly reduce the labor cost and improve the material utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Front view of the preferred embodiment of the present invention;

[0023] Figure 2 Left view of the preferred embodiment of the present invention;

[0024] Figure 3 Top view of the preferred embodiment of the present invention;

[0025] Figure 4 Structural diagram of the target finished product of the preferred embodiment of the present invention;

[0026] Figure 5 Front view of the target finished product of the preferred embodiment of the present invention;

[0027] Figure 6 Structural diagram of the winding tool in the preferred embodiment of the present invention;

[0028] Figure 7 Structural diagram of the punching mechanism in the preferred embodiment of the present invention;

[0029] Figure 8 Front view of the punching mechanism in the preferred embodiment of the present invention;

[0030] Figure 9 Structural diagram of the hydraulic mechanism in the preferred embodiment of the present invention;

[0031] Figure 10 Front view of the hydraulic mechanism in the preferred embodiment of the present invention.

[0032] In the figure: 1. Winding tool; 1-1. Support frame for wrapping; 1-2. Secondary coil; 1-3. Support frame; 1-4. Insert plate; 1-5. Tool body; 2. Punching mechanism; 2-1. Support plate; 2-2. Punching tooling; 2-3. Shaft mounting sleeve; 3. Hydraulic mechanism; 3-1. Base; 3-2. Insertion slot; 3-3. Positioning pin; 4. Copper strip; 5. Primary terminal; 6. Copper pin. Detailed implementation manners

[0033] To make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific implementation manners.

[0035] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] See also Figure 1-3 , a primary coil forming device based on copper strip, comprising:

[0037] The copper strip is bent to form a winding jig 1 for winding a primary coil;

[0038] A punching mechanism 2 for punching holes on the primary coil;

[0039] The positioning pin is inserted into the primary terminal hole, and the copper pin connects the primary terminal and the primary coil, thereby completing the hydraulic mechanism (3) of the primary coil and copper pin crimping process.

[0040] Wherein: the punching mechanism 2 is located between the winding jig 1 and the hydraulic mechanism 3 .

[0041] See also Figure 4-5 The finished product of the present invention mainly includes a U-shaped copper strip 4 and an L-shaped primary terminal 5. The primary coil is formed by bending and deforming the copper strip, and a set of mirror-symmetrical primary terminals. The primary terminal and the coil are both made of copper, and the two need to fit closely. To ensure their conductive properties, gas welding and crimping can be used as two connection methods. Gas welding has safety hazards and is not conducive to environmental protection.

[0042] See also Figure 6 The function of the winding jig 1 is to bend the copper strip and wind it into a primary coil of specified size.

[0043] The winding mold 1 includes a supporting frame 1-1 and a mold body 1-5; wherein: the left end face of the mold body 1-5 is connected to the support frame 1-3; the right end face of the mold body 1-5 is provided with a horizontal insertion hole; and a plug plate 1-4 is arranged in the insertion hole.

[0044] The mold body 1-5 is composed of two plates of the same structure; the lower end surface of the plate is fixed to the upper surface of the package support frame 1-1, and a bending portion bent inward is provided at the upper end of each plate; the two plates are horizontal channels for accommodating the secondary coil 1-2.

[0045] The support frame 1 - 3 is provided with an adjustment hole along the horizontal direction; the left end surface of the plate is connected to the support frame 1 - 3 through a connecting piece and the adjustment hole.

[0046] During use, first design the fixture body according to the innermost dimension (inner diameter) of the primary coil. The number of layers and length of the single-turn copper strip of the coil change with the product parameters, so the fixture needs to be adjustable. Figure 6 The fixture body consists of two mirror-symmetrical parts. The left part is fixed to the support frame, and the right part can be slidably adjusted through the keyway, so as to adapt to primary coils of different lengths. The raw material for the production of the primary coil is copper strip with a thickness of 1 mm, and different product parameters correspond to different numbers of turns and single-turn layers.

[0047] After winding is completed, pull out the plug board to the right, and the primary coil and secondary coil can be taken out together.

[0048] Please refer to Figure 7-8 : The punching mechanism 2 includes a support plate 2-1, on which a punching tooling 2-2 and a shaft mounting sleeve 2-3 are provided. The bench drill is connected to the support plate 2-1 through the shaft mounting sleeve 2-3. A horizontal socket for inserting the copper strip is provided on the side wall of the punching tooling 2-2; a vertical through hole communicating with the horizontal socket is provided on the upper surface of the punching tooling 2-2.

[0049] During use, bend the wound coil, and insert the side that needs to be punched into the punching tooling slot (i.e., the horizontal socket). Since the number of layers of the copper strip to be punched is different, the punching tooling needs to be adjustable. The base of the punching tooling and the support plate are connected through the keyway and can be slidably adjusted. The support plate is assembled with the spindle of the bench drill, and the punching work is completed with the bench drill.

[0050] Note: The primary coil always surrounds the secondary coil. For simplicity, Figure 7-8 the secondary coil is not assembled in the figure.

[0051] Please refer to Figure 9-10 : The hydraulic mechanism 3 includes a base 3-1, on the upper surface of which a rectangular slot 3-2 for inserting the primary terminal is provided; the slot 3-2 is at least connected to one side of the base 3-1; at least one pin hole perpendicular to the slot 3-2 is provided on the side of the base 3-1; the positioning pin 3-3 connects the primary terminal 5 to the base 3-1 after passing through the pin hole; the copper pin 6 connects the copper strip 4 and the primary terminal 5 after passing through the through hole on the copper strip 4 and the through hole of the primary terminal 5.

[0052] During use, the primary terminal is connected to the primary coil through the copper pin and placed in the slot 3-2 of the hydraulic workbench base. The primary terminal is connected to the base through the positioning pin. Use the hydraulic press to complete the crimping process, pull out the positioning pin, and take out the product. Note: The primary coil always surrounds the secondary coil. For simplicity, Figure 9-10 the secondary coil is not assembled.

[0053] The working process of this technical solution is as follows: First, wind the primary coil, and then crimp it with the primary terminal. Before crimping, it is necessary to position the copper strip and the primary terminal. The primary terminal is an externally purchased component. The copper strip needs to be drilled with holes by itself, and then the pins are inserted, and the final crimping process is completed with a hydraulic mechanism.

[0054] The second object of the present invention is to provide a forming process for a primary coil forming device based on a copper strip, including the following steps:

[0055] S1. Use the winding tool (1) to bend the copper strip (4) into a square shape with an opening;

[0056] S2. Use the drilling mechanism (2) to drill holes on both sides of the upper surface of the square-shaped copper strip (4) with an opening;

[0057] S3. Crimp the primary terminal (5) at the through holes on the upper surface of the square-shaped copper strip (4) with an opening, and use the hydraulic mechanism (3) for crimping.

[0058] The above operation platform can complete the primary winding, drilling, and hydraulic processes of the copper strip. The structures and usage methods of the bench drill and the hydraulic press involved are prior art; the primary terminal, copper strip, and copper pins are production materials; the secondary coil is a previous finished product. All the other accessories are processed and customized according to the drawings and assembled according to the attached drawings of the present invention.

[0059] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A primary coil forming device based on copper strip, characterized in that, At least including: Bending a copper strip and then winding a winding tool (1) for the primary coil; A punching mechanism (2) for punching holes in the primary coil; A hydraulic mechanism (3) for inserting a positioning pin into the primary terminal hole, connecting the copper pin to the primary terminal and the primary coil, and then completing the crimping process of the primary coil and the copper pin; The winding tool (1) includes a supporting and wrapping frame (1-1) and a tool body (1-5); wherein: the left end face of the tool body (1-5) is connected to the supporting frame (1-3); a horizontal jack is provided on the right end face of the tool body (1-5); an inserting plate (1-4) is arranged in the jack; The hydraulic mechanism (3) includes a base (3-1), and a rectangular inserting slot (3-2) for inserting the primary terminal is provided on the upper surface of the base (3-1); the inserting slot (3-2) is at least communicated with one side face of the base (3-1); at least one pin hole perpendicular to the inserting slot (3-2) is provided on the side face of the base (3-1); the positioning pin (3-3) connects the primary terminal (5) to the base (3-1) after passing through the pin hole; the copper pin (6) connects the copper strip (4) and the primary terminal (5) after passing through the through holes on the copper strip (4) and the through hole of the primary terminal (5).

2. The primary coil forming device based on copper strip according to claim 1, wherein: The tool body (1-5) is composed of two identical plate parts; the lower end faces of the plate parts are fixed on the upper surface of the supporting and wrapping frame (1-1), and bending parts bent inward are arranged at the upper ends of each plate part; the two plate parts form a horizontal channel for accommodating the secondary coil (1-2).

3. The primary coil forming device based on copper strip according to claim 2, wherein: Adjusting holes are provided on the supporting frame (1-3) along the horizontal direction; the left end face of the plate part is connected to the supporting frame (1-3) through a connecting part and the adjusting hole.

4. The primary coil forming device based on copper strip according to claim 1, characterized in that: The punching mechanism (2) includes a supporting plate (2-1), a punching tool (2-2) and a shaft mounting sleeve (2-3) are arranged on the supporting plate (2-1), a bench drill is connected to the supporting plate (2-1) through the shaft mounting sleeve (2-3), a horizontal inserting opening for inserting the copper strip is provided on the side wall of the punching tool (2-2); a vertical through hole communicated with the horizontal inserting opening is provided on the upper surface of the punching tool (2-2).

5. The primary coil forming device based on copper strip according to any one of claims 1-4, characterized in that: The punching mechanism (2) is located between the winding tool (1) and the hydraulic mechanism (3).

6. A primary coil forming process based on copper strip, characterized in that, Using the primary coil forming device based on copper strip according to claim 5, the following steps are completed: S1. Using the winding tool (1) to bend the copper strip (4) into a square shape with an opening; S2. Using the punching mechanism (2) to punch holes on both sides of the upper surface of the square-shaped copper strip (4) with an opening; S3. Pressing the primary terminal (5) at the through holes on the upper surface of the square-shaped copper strip (4) with an opening, and using the hydraulic mechanism (3) for pressing.

Images