Full-automatic numerical control winding machine for primary coil of voltage transformer

Abstract

The utility model discloses a voltage transformer primary coil full-automatic numerical control winding machine which comprises supports which are oppositely arranged on a machine frame and can be opened and closed, the machine frame is further provided with a paper feeding device arranged on one side of a winding displacement device, and the paper feeding device comprises a paper storage mechanism, a transmission mechanism, a paper cutting mechanism and a paper pressing mechanism. The paper pressing mechanism comprises a paper pressing air cylinder used for driving the paper pressing mechanism to be close to the winding device and an installation base in linkage with the paper pressing air cylinder, a pressing rod is hinged to the bottom of the installation base, an elastic pressing wheel is arranged at one end of the pressing rod, and the elastic pressing wheel is located above the winding device. And an elastic piece is arranged between the other end of the pressing rod and the mounting seat. Through the compensation of the elastic piece to the pressing rod, even if the elastic pressing wheel touches the uneven surface of the wire, the insulating paper can be tightly pressed against the surface of the wire, the position of the insulating paper is kept unchanged all the time, and the yield of coil winding is improved.

Description

Technical Field

[0001] This utility model specifically relates to a fully automatic CNC winding machine for the primary coil of a voltage transformer. Background Technology

[0002] The coil is an important component of a voltage transformer. Its quality and performance directly affect the performance of the voltage transformer, and the winding cost directly affects the manufacturing cost of the coil. Existing mechanical winding machines only employ mechanical methods for winding the wire. For example, the CNC winding machine for voltage transformers disclosed in Chinese patent CN 103151164 B uses CNC to control gears to drive the combined winding clamps for wire arrangement and winding. Through the split combined winding rollers, the iron core can be wound into coils without separating it. However, it cannot automatically feed the insulating paper. The insulating paper between the wires is still manually cut and placed. That is, after each turn of wire is wound by the winding roller, the appropriate length of insulating paper must be manually cut and placed on the winding roller before the second turn of wire can be wound. Since the number of coils is generally more than ten layers, a dedicated person is needed to operate a winding machine for cutting and placing the insulating paper during the winding process. The time spent on cutting and placing the insulating paper is long, which not only reduces the winding efficiency but also increases the winding labor cost.

[0003] To improve winding efficiency, Chinese patent CN 209561202 U discloses an automatic paper-feeding CNC winding machine for voltage transformers. This machine utilizes automatic paper feeding, paper cutting, and an elastic pressure head to cover the outside of the conductor with insulating paper before winding the second layer of coil. While it achieves automatic winding of the insulating paper, the elastic pressure head uses a lever-type structure. A cylinder drives the other end of the pressure head, causing it to swing relative to the conductor, thus pressing the insulating paper onto the outside of the wound conductor. However, because the insulating paper is directly pressed by the elastic pressure head, the uneven surface of the winding conductor leads to varying gaps between the pressure head and the conductor. This results in jumping during the winding process, causing positional deviations in the insulating paper winding and affecting the quality of the coil winding. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fully automatic CNC winding machine for the primary coil of a voltage transformer.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A fully automatic CNC winding machine for the primary coil of a voltage transformer includes an openable support mounted on a frame. Several rollers are mounted opposite each other on the support, and a winding device is installed between the rollers. A drive assembly capable of rotating the winding device is mounted on the frame. A wire feeding device is mounted on the frame, and a paper feeding device is also mounted on one side of the wire feeding device. The paper feeding device includes a paper storage mechanism mounted on the frame, a transmission mechanism for conveying insulating paper placed in the paper storage mechanism, a paper cutting mechanism for cutting the insulating paper, and a paper pressing mechanism for pressing the cut insulating paper onto the winding device. The paper pressing mechanism includes a paper pressing cylinder for driving the paper pressing mechanism closer to the winding device, and a mounting base linked to the paper pressing cylinder. A pressure rod is hinged to the bottom of the mounting base. One end of the pressure rod is provided with an elastic pressure roller located above the winding device, and the other end of the pressure rod is provided with an elastic element between itself and the mounting base.

[0007] The front end of the bracket is provided with a support platform for supporting the iron core of the winding device.

[0008] The frame is equipped with an adjustment slot for adjusting the position of the support platform.

[0009] A paper feed trough is provided between the paper pressing mechanism and the transmission mechanism, and the paper cutting mechanism is located at the rear end of the paper feed trough.

[0010] The paper feed tray includes a left baffle and a right baffle whose position can be adjusted relative to the left baffle.

[0011] The paper feed slot is also equipped with a photoelectric sensor for detecting whether there is insulating paper in the paper feed slot.

[0012] The mounting base is located on one side of the paper pressing cylinder and has a linkage part that is linked to the paper pressing cylinder. The bottom of the mounting base is provided with a U-shaped notch, and the pressure rod is rotatably disposed in the U-shaped notch.

[0013] The elastic pressure roller is rotatably mounted at one end of the pressure rod.

[0014] The paper cutting mechanism is a cam-type paper cutting mechanism.

[0015] The beneficial effects of this utility model are as follows: The elastic pressure head is changed to a telescopic structure driven by a paper-pressing cylinder. The paper-pressing cylinder drives the pressure rod to approach the winding device and presses one end of the cut insulating paper onto the winding device. The winding device rotates to cover a layer of wire with the insulating paper. Moreover, through the compensation of the pressure rod by the elastic element, the elastic pressure roller can press the insulating paper tightly against the surface of the wire even if it encounters an uneven wire surface, so that its position remains unchanged, thereby improving the yield of coil winding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a structural schematic diagram of the present invention from another angle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] As shown in the figure, this utility model discloses a fully automatic CNC winding machine for the primary coil of a voltage transformer. It includes a support 2 that is mounted on a frame 1 and can be opened and closed. The support opens to the rear for easier replacement of the winding device. Several rollers 17 are mounted on the support, with winding devices installed between them. A drive assembly 8 that allows the winding device to rotate is mounted on the frame. A wire feeding device is also mounted on the frame, and a paper feeding device is located on one side of the wire feeding device. The paper feeding device includes components mounted on the frame. The device includes a paper storage mechanism, a transmission mechanism for conveying insulating paper placed in the paper storage mechanism, a paper cutting mechanism 14 for cutting the insulating paper, and a paper pressing mechanism for pressing the cut insulating paper onto the winding device. The paper pressing mechanism includes a paper pressing cylinder 7 for driving the paper pressing mechanism closer to the winding device, and a mounting base 6 linked to the paper pressing cylinder. A pressure rod 4 is hinged to the bottom of the mounting base. One end of the pressure rod is provided with an elastic pressure roller 9, and the elastic pressure roller is located above the winding device. An elastic element 5 is provided between the other end of the pressure rod and the mounting base.

[0021] The wire winding device includes a first lead screw module slide 18 fixed on the frame and a second lead screw module slide 18 mounted on the first lead screw module slide 18. The first lead screw module slide 18 is driven by a servo motor to move the entire wire winding mechanism, paper feeding mechanism, and paper cutting mechanism longitudinally. The second lead screw module slide 18 is driven by a servo motor I. The lead screw module slide 18 is equipped with a wire winding rod 16 that can move the copper wire left and right. The wire winding rod is equipped with multiple rollers for guiding the copper wire. The distance the wire winding rod moves on the lead screw module slide 18 is the length of one turn of copper wire. The wire winding is achieved by using the forward and reverse rotation of the servo motor I and the encoder to drive the wire winding rod to move left and right by a fixed length. When the number of layers of wire (copper wire) or the total length of wire reaches the value set in the computer, the winding of one coil or one half-zone is completed.

[0022] The transmission mechanism can be composed of insulating paper shafts, several rubber rollers, etc., which are combined to form a transmission path to guide the insulating paper wound on the insulating paper tube to the paper feed slot via several rubber rollers.

[0023] The front end of the bracket is provided with a support platform 3 for supporting the iron core 11 of the winding device. The platform supports the iron core and can also be adjusted to meet the usage requirements of different winding devices. The winding drum of the winding device is linked to the drive component through the gears 10 on both sides, thereby driving the winding drum to rotate.

[0024] The frame is equipped with an adjustment groove for adjusting the position of the support platform. The position of the support platform can be adjusted by moving the support platform, thereby changing its position. The transfer and fixation of the support platform is achieved by tightening or loosening the bolts.

[0025] A paper feed slot is provided between the paper pressing mechanism and the transmission mechanism, and the paper cutting mechanism is located at the rear end of the paper feed slot. The paper feed slot includes a left baffle 12 and a right baffle 13 that can be adjusted relative to the left baffle. The right baffle is adjustable, thereby changing the width of the paper feed slot to accommodate the use of insulating paper of different sizes. At the same time, the paper feed slot is inclined downward, and its end is placed above the winding device. The cutting insulating paper can be fed to the winding device by the downward sliding force, and then pressed against the winding device by the downward pressing paper pressing device.

[0026] The paper feed slot is specifically a square slot adapted to the width of the insulating paper, used to limit the width of the insulating paper so that it can more accurately wrap around the enameled copper wire of the winding spool.

[0027] The paper feed slot is also equipped with a photoelectric sensor for detecting whether there is insulating paper in the paper feed slot. It is used to stop the machine when there is no paper, so as to avoid rework and coil scrapping.

[0028] The mounting base is located on one side of the paper-pressing cylinder and has a linkage part that is linked to the paper-pressing cylinder. The bottom of the mounting base is provided with a U-shaped notch, and the pressure rod is rotatably disposed in the U-shaped notch. The pressure rod is hinged in the U-shaped notch by a pin, so that the pressure rod can rotate relative to the cylinder, but the maximum range of rotation is limited by the notch. The other end of the pressure rod is provided with an elastic element between it and the mounting base. The elastic element provides a restoring force to the pressure rod, so that the pressure rod can always move towards the winding device, so that the pressure rod can be tightly attached to the surface of the wire of the winding device. The elastic element is a spring. When there is an uneven surface, the pressure rod floats relative to it to avoid it, ensuring that the insulating paper can be pressed tightly onto the winding device. As it rotates, the pressure rod will float relative to it, ensuring that the insulating paper can be wound on the winding device and completely cover the surface of the wire of the winding device.

[0029] The elastic pressure roller 9 is rotatably mounted at one end of the pressure rod, which reduces friction during engagement, reduces damage to the insulating paper, and better presses the insulating paper onto the winding device.

[0030] The paper cutting mechanism is a cam paper cutting mechanism. Since the insulating paper is thin, the general paper cutting method will lead to unstable paper cutting, with burrs, rough edges or incomplete cutting. Therefore, the cam paper cutting mechanism can achieve a stable paper cutting effect.

[0031] Specific steps:

[0032] Step 1: The wire laying device winds the enameled copper wire onto the winding drum of the winding device. The driving component drives the winding drum to rotate, and the wire laying device moves from one end of the winding drum to the other end at a set speed to complete the winding of one layer of enameled copper wire.

[0033] Step 2: The paper feeding mechanism drives the insulating paper to move towards the winding device. The servo motor rotates a set number of times according to the set length, and triggers the paper cutting mechanism in real time after reaching the set value to complete the cutting of the insulating paper to the set length.

[0034] Step 3: The paper pressing cylinder is activated, which drives the pressure rod and the elastic pressure roller to move towards the winding device. One end of the insulating paper is pressed against the surface of the enameled copper wire by the elastic pressure roller 9.

[0035] Step 4: The drive component drives the winding drum to rotate, winding the insulating paper onto the surface of the enameled copper wire. Then the paper pressing cylinder is activated and reset. Then the wire laying device continues to work, moving from the other end of the winding drum to the initial end at the set speed, winding the second layer of enameled copper wire onto the surface of the insulating paper.

[0036] Step 5: Repeat the above steps to complete the winding of the primary coil of the voltage transformer.

[0037] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A fully automatic CNC winding machine for the primary coil of a voltage transformer, comprising a support (2) that is disposed opposite to each other on a frame (1) and is openable and closable, wherein a plurality of rollers (17) are disposed opposite to each other on the support, a winding device is disposed between the rollers, a drive assembly (8) that enables the winding device to rotate is disposed on the frame, and a wire laying device is disposed on the frame, characterized in that: The frame is also provided with a paper feeding device located on one side of the winding device. The paper feeding device includes a paper storage mechanism located on the frame, a transmission mechanism for conveying insulating paper placed in the paper storage mechanism, a paper cutting mechanism (14) for cutting the insulating paper, and a paper pressing mechanism for pressing the cut insulating paper onto the winding device. The paper pressing mechanism includes a paper pressing cylinder (7) for driving the paper pressing mechanism closer to the winding device and a mounting base (6) linked to the paper pressing cylinder. A pressure rod (4) is hinged to the bottom of the mounting base. One end of the pressure rod is provided with an elastic pressure wheel (9), and the elastic pressure wheel is located above the winding device. An elastic element (5) is provided between the other end of the pressure rod and the mounting base.

2. The fully automatic CNC winding machine for the primary coil of a voltage transformer according to claim 1, characterized in that: The front end of the bracket is provided with a support platform (3) for supporting the iron core of the winding device.

3. The fully automatic CNC winding machine for the primary coil of a voltage transformer according to claim 2, characterized in that: The frame is equipped with an adjustment slot for adjusting the position of the support platform.

4. The fully automatic CNC winding machine for the primary coil of a voltage transformer according to claim 1, characterized in that: A paper feed trough is provided between the paper pressing mechanism and the transmission mechanism, and the paper cutting mechanism is located at the rear end of the paper feed trough.

5. The fully automatic CNC winding machine for the primary coil of a voltage transformer according to claim 4, characterized in that: The paper feed tray includes a left baffle (12) and a right baffle (13) whose position can be adjusted relative to the left baffle.

6. The fully automatic CNC winding machine for the primary coil of a voltage transformer according to claim 4 or 5, characterized in that: The paper feed slot is also equipped with a photoelectric sensor for detecting whether there is insulating paper in the paper feed slot.

7. The fully automatic CNC winding machine for the primary coil of a voltage transformer according to claim 1, characterized in that: The mounting base is located on one side of the paper pressing cylinder and has a linkage part that is linked to the paper pressing cylinder. The bottom of the mounting base is provided with a U-shaped notch, and the pressure rod is rotatably disposed in the U-shaped notch.

8. The fully automatic CNC winding machine for the primary coil of a voltage transformer according to claim 1, characterized in that: The elastic pressure roller is rotatably mounted at one end of the pressure rod.

9. The fully automatic CNC winding machine for the primary coil of a voltage transformer according to claim 1, characterized in that: The paper cutting mechanism is a cam-type paper cutting mechanism.

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