A transformer coil pin straightening device

Abstract

The utility model relates to a mutual -inductor coil pin straightening device relates to coil processing technical field, adopt the technical scheme including coil frock, clamping device and linear drive arrangement, coil frock includes support plate and sets up the clamping groove on support plate, the clamping groove is through groove and extends to the support plate top and forms the opening, clamping device includes pneumatic finger and two elastic clamps, and two elastic clamps face each other one side is provided with arc groove, and two elastic clamps are pasted and form a complete circular groove after two arc grooves, the circular groove is matched with pin, and the circular groove center axis is with clamping groove center axis collinear, linear drive arrangement is used for driving clamping device linear movement, and linear movement direction is with circular groove center axis parallel, the utility model discloses the bent pin is straightened gradually under the guidance of the constraint of circular groove, does not cause the hidden injury of scratch and internal stress to pin surface, and simple structure is convenient.

Description

Technical Field

[0001] This utility model relates to the field of coil processing technology, and in particular to a device for straightening the coil leads of a current transformer. Background Technology

[0002] After the current transformer coil is wound, its leads usually have varying degrees of bending. This bending severely affects the efficiency and yield of subsequent wire stripping, soldering, insertion, and overall assembly. Therefore, straightening and shaping the leads is a necessary step in the coil production process. Currently, there are roughly two common methods for straightening current transformer coil leads: manual straightening using simple tools or by hand, and mechanical straightening. Manual straightening is time-consuming and labor-intensive, relying heavily on the operator's feel and requiring a high level of skill. The repeated pulling motion can easily lead to operator fatigue. Mechanical straightening basically uses rigid clamps to grip the ends of the leads and then forcibly pulls them backward using a power source such as a cylinder or motor. Although this method is more efficient, it is a forceful straightening method with obvious drawbacks. 1. It is easy to cause surface damage. The rigid claws can easily scratch the insulating varnish or plating on the pin surface. The damaged parts cannot be used and need to be cut off, which leads to an increase in consumables. 2. Internal stress is generated. Instantaneous strong stretching may cause stress concentration in the internal lattice structure of the wire, forming hidden damage and affecting the long-term electrical performance and service life of the coil. 3. The equipment is bulky, and the existing mechanical equipment has a complex structure and lacks portability. Utility Model Content

[0003] To address the problems of surface damage and internal stress caused by mechanically straightening leads in existing technologies, this invention provides a device for straightening the leads of a current transformer coil.

[0004] This utility model provides the following technical solution: a device for straightening the leads of a current transformer coil, comprising: A coil fixture includes a support plate and a slot disposed on the support plate, the slot being a through slot and extending to the top of the support plate to form an opening; The clamping device includes a pneumatic finger and two elastic clamps respectively disposed on the two grippers of the pneumatic finger. Each of the two elastic clamps has an arc-shaped groove on the side facing each other. After the two elastic clamps are in contact, the two arc-shaped grooves form a complete circular groove. The circular groove mates with the pin, and the central axis of the circular groove is collinear with the central axis of the slot. A linear drive device is used to drive the clamping device to move linearly, and the direction of linear movement is parallel to the central axis of the circular groove.

[0005] Preferably, a buffer pad is provided on the side of the support plate away from the clamping device, and the buffer pad is also provided with the slot.

[0006] Preferably, the arc-shaped groove has a conical groove at the end opposite to the coil tooling, and the bottom surface of the conical groove with a smaller area is connected to the arc-shaped groove, and the connection is rounded.

[0007] Preferably, the conical groove is provided at both ends of the arc-shaped groove.

[0008] Preferably, the linear drive device includes a dual-axis cylinder, and the two piston rods of the dual-axis cylinder are connected to the pneumatic finger.

[0009] Preferably, the linear drive device is a ball screw linear module.

[0010] The beneficial effects of this utility model are: by using a coil fixture to hold the coil, and by using a clamping device to form a circular groove to clamp the pin and move it linearly relative to the pin, the bent pin is gradually straightened under the guidance and constraint of the circular groove. Compared with the existing technology of clamping the end of the pin and then straightening it, it will not cause scratches on the pin surface or hidden damage caused by internal stress, and the structure is simple and convenient. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of one embodiment of a pin straightening device.

[0012] Figure 2 This is a top view of one embodiment of a pin straightening device.

[0013] Figure 3 This is a schematic diagram of one embodiment of a coil tooling.

[0014] Figure 4 This is a schematic diagram of one embodiment of the clamping device.

[0015] Figure 5 This is a schematic diagram of the clamping device.

[0016] Reference numerals: 10-coil fixture, 11-support plate, 12-slot, 13-buffer pad, 20-clamping device, 21-pneumatic finger, 22-gripper, 23-elastic clamp, 24-arc groove, 25-circular groove, 26-conical groove, 30-linear drive device. Detailed Implementation

[0017] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0018] This utility model provides, for example Figure 1-5 The device shown is a transformer coil pin straightening device, including a coil fixture 10, a clamping device 20 and a linear drive device 30.

[0019] The coil fixture 10 includes a support plate 11 and a slot 12 disposed on the support plate 11. The slot 12 is a through slot that extends to the top of the support plate 11 to form an opening, allowing the coil leads to be inserted into the slot 12 through the opening. Further, the support plate 11 has a mounting groove on the side opposite to the clamping device 20, and a buffer pad 13 is disposed within the mounting groove. The buffer pad 13 also has the slot 12, which extends to the top of the buffer pad 13 to form an opening. The buffer pad 13 is made of an elastic material such as nylon and is used to protect the coil body during straightening, preventing damage due to squeezing or collision.

[0020] The clamping device 20 includes a pneumatic finger 21 and two elastic clamps 23 respectively disposed on the two grippers 22 of the pneumatic finger 21. Each of the two elastic clamps 23 has an arc-shaped groove 24 on its face facing each other. After the two elastic clamps 23 are driven by the two grippers 22 of the pneumatic finger 21 to move closer together and fit together, the two arc-shaped grooves 24 form a complete circular groove 25. The central axis of the circular groove 25 is collinear with the central axis of the slot 12. Figure 2 As shown, the pin extending from the slot 12 can be inserted into the circular groove 25. When straightened, the circular groove 25 moves linearly relative to the pin, providing guidance and constraint. Since coil pins are generally made of round wire, the large contact area and pressure dispersion between the circular groove 25 and the pin effectively prevent indentations and scratches on the pin surface during relative movement. The elastic clamp 23 is made of elastic materials such as rubber, further reducing adverse effects on the pin surface. This invention does not limit the diameter of the arc-shaped groove 24; a series of elastic clamps 23 with arc-shaped grooves 24 of different diameters can be configured to suit different diameters of the pin wire.

[0021] The arc-shaped groove 24 has a conical groove 26 at one end opposite to the coil fixture 10. The smaller bottom surface of the conical groove 26 connects to the arc-shaped groove 24, and the connection point is rounded to further prevent scratching the pin surface when the arc-shaped groove 24 rubs against the bent part of the pin during straightening. In other embodiments, the arc-shaped groove 24 has conical grooves 26 at both ends, so that the elastic clamp 23 does not need to be selected in direction when installed on the gripper 22, making installation more convenient.

[0022] The linear drive device 30 is used to drive the clamping device 20 to move linearly, and the direction of linear movement is parallel to the central axis of the circular groove 25. Figure 1In the illustrated embodiment, the linear drive device is a dual-axis cylinder, and the two piston rods of the dual-axis cylinder are connected to the pneumatic finger 21. When the dual-axis cylinder drives the pneumatic finger 21 to move linearly, the pneumatic finger 21 will not deflect. In other embodiments, the linear drive device 30 may also employ a ball screw linear module, or a single-axis cylinder with a linear guide rail provided for the pneumatic finger 21.

[0023] When this utility model is in operation, the clamping device 20 can be placed close to the coil fixture 10 first, and then the bent lead of the coil can be passed through the slot 12 on the coil fixture and the lead can be passed between the two elastic clamps 23. Next, the pneumatic finger 21 is activated to clamp the two elastic clamps 23, and the lead is placed in the circular groove 25. Then, the pneumatic linear drive device 30 moves the pneumatic finger 21 away from the coil fixture 10, and the bent lead is gradually straightened under the guidance and constraint of the circular groove 25, without causing hidden damage.

[0024] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for straightening the leads of a current transformer coil, characterized in that, include: A coil fixture includes a support plate and a slot disposed on the support plate, the slot being a through slot and extending to the top of the support plate to form an opening; The clamping device includes a pneumatic finger and two elastic clamps respectively disposed on the two grippers of the pneumatic finger. Each of the two elastic clamps has an arc-shaped groove on the side facing each other. After the two elastic clamps are in contact, the two arc-shaped grooves form a complete circular groove. The circular groove mates with the pin, and the central axis of the circular groove is collinear with the central axis of the slot. A linear drive device is used to drive the clamping device to move linearly, and the direction of linear movement is parallel to the central axis of the circular groove.

2. The transformer coil lead straightening device according to claim 1, characterized in that, A buffer pad is provided on the side of the support plate away from the clamping device, and the buffer pad is also provided with the slot.

3. The transformer coil lead straightening device according to claim 1, characterized in that, The arc-shaped groove has a conical groove at one end away from the coil fixture. The bottom surface of the conical groove with a smaller area is connected to the arc-shaped groove, and the connection is rounded.

4. A device for straightening the leads of a current transformer coil according to claim 3, characterized in that, The arc-shaped groove has conical grooves at both ends.

5. A device for straightening the leads of a current transformer coil according to claim 1, characterized in that, The linear drive device includes a dual-axis cylinder, and the two piston rods of the dual-axis cylinder are connected to the pneumatic finger.

6. A device for straightening the leads of a current transformer coil according to claim 1, characterized in that, The linear drive device is a ball screw linear module.

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