Laser spot welding lead correcting device

Abstract

The utility model relates to the field of manufacturing of inductance coils, in particular to a laser spot welding lead correcting device which comprises a base, a driving unit, a bearing plate and a tool apron assembly, a guide rail extending in the vertical direction is arranged in the base, and an upper sliding seat and a lower sliding seat are symmetrically connected to the guide rail in a sliding mode. The driving unit comprises two air cylinders which are symmetrically arranged; the end parts of piston rods of the air cylinders are connected with the corresponding sliding seats; the end face of the bearing plate is provided with station grooves distributed in an array mode, an opening penetrating through a plate body and limiting grooves communicating with the station grooves and the opening. The tool apron assembly comprises an upper tool apron and a lower tool apron, a plurality of correction blocks are arranged at the bottom of the upper tool apron, and the tail ends of the correction blocks are wedge-shaped tips; the bearing plate is located between the upper tool apron and the lower tool apron, the movement path of the wedge-shaped tip end of the correction block is matched with the opening position of the bearing plate, and correspondingly, the coil lead can be effectively corrected by utilizing the correction block to extrude the leads on the two sides through matching of the upper tool apron and the lower tool apron.

Description

Technical Field

[0001] This utility model relates to the field of inductor coil manufacturing, and more specifically, it relates to a laser spot welding lead straightening device. Background Technology

[0002] Inductors, as one of the three major passive electronic components in electronic product circuit boards, are widely used in consumer electronics, communications, industrial equipment, automobiles, new energy, and the Internet of Things (IoT). With the rapid evolution of communication technology in China and the large-scale construction of related industries such as IoT and smart cities, the Chinese inductor market has experienced rapid growth. To meet these application demands, the development trend of inductors is characterized by miniaturization, higher frequency, and higher power. The trend of electronic products developing towards smaller, lighter, and higher-performance products places higher demands on the reliability and integrated design of inductors. An inductor mainly consists of three parts: a coil, a magnetic core, and electrodes. Among these, the winding of the coil is crucial to the quality of the inductor. During the laser spot welding process of the coil, because the opening position of the coil leads cannot be uniform, deviations will occur when matching with the lead frame, which is not conducive to machine adjustment and results in a low yield rate. Specifically, for example… Figure 1 As shown.

[0003] Some production lines rely on operators to visually observe and manually adjust the lead wire position. However, manual intervention has drawbacks: differences in the correction force of different operators result in lead wire spacing fluctuations of up to ±0.2mm (the allowable tolerance for spot welding is ±0.05mm); each shift requires more than 200 manual interventions, which can easily lead to operational errors due to fatigue. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a laser spot welding lead wire straightening device that can be used specifically for straightening leads and improving the product qualification rate.

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

[0006] A laser spot welding lead straightening device includes:

[0007] The base has a vertically extending guide rail inside, and an upper slide seat and a lower slide seat are symmetrically slidably connected on the guide rail.

[0008] The drive unit includes two symmetrically arranged cylinders, which are respectively located at both ends of the base, and the piston rod ends of the cylinders are connected to the corresponding slides.

[0009] The bearing plate has arrayed workstation slots, an opening penetrating the plate body, and a limiting slot connecting the workstation slots and the opening on its end face.

[0010] The tool holder assembly includes:

[0011] The upper tool holder, which is fixedly connected to the upper slide, has several straightening blocks at its bottom, with wedge-shaped tips at the ends of the straightening blocks;

[0012] The lower tool holder is fixedly connected to the lower slide block;

[0013] The support plate is located between the upper and lower tool holders, and the movement path of the wedge-shaped tip of the straightening block corresponds to the opening position of the support plate.

[0014] The present invention is further configured such that the wedge-shaped tip of the corrective block has an equilateral triangular structure.

[0015] The present invention is further configured such that: the opening of the bearing plate is a long strip-shaped through groove, the depth direction of which is consistent with the moving direction of the correction block, and the opening width is greater than that of the correction block.

[0016] The present invention is further configured such that: a positioning hole is provided on the support plate, and the positioning hole penetrates the support plate.

[0017] The present invention is further configured such that the upper slide is provided with a guide rod that is adapted to the positioning hole.

[0018] The present invention is further configured such that: the upper slide and the lower slide are provided with a number of symmetrically arranged uprights.

[0019] The present invention is further configured such that the width of the limiting groove is greater than the diameter of the lead wire.

[0020] Compared with the shortcomings of the existing technology, the beneficial effects of this utility model are as follows:

[0021] This device, through the cooperation of an upper and lower tool holder, uses a straightening block to compress the leads on both sides, effectively straightening the coil leads and thus improving the quality and reliability of the coil products. By standardizing the lead positions, it significantly improves the precision and consistency of laser spot welding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the coil to be corrected;

[0023] Figure 2 This is a schematic diagram of the coil after correction;

[0024] Figure 3 This is a three-dimensional schematic diagram of the corrective device;

[0025] Figure 4 This is a schematic diagram of the supporting plate structure;

[0026] Figure 5 This is a schematic diagram of the upper tool holder.

[0027] Base 1, guide rail 11, upper slide 12, lower slide 13, upright 14, cylinder (21,22) bearing plate 3, work station slot 30, limit slot 31, opening 301, positioning hole 302, upper tool holder 41, lower tool holder 42, straightening block 5, coil 6, lead wire 61. Detailed Implementation

[0028] Reference Figures 2 to 5 The present invention provides a further description of a laser spot welding lead straightening device.

[0029] It includes the base, drive unit, carrier plate, and tool holder assembly.

[0030] The base has vertically extending guide rails inside, with symmetrically arranged upper and lower sliding seats that slide and connect to them. The guide rails ensure the smoothness and accuracy of the upper and lower sliding seats during movement. There can be two or more guide rails to improve sliding stability.

[0031] Several symmetrically arranged uprights are provided on the upper and lower slides. These uprights are typically cylindrical or square metal rods. The number and symmetrical arrangement of the uprights are to form a stable support structure between the upper and lower slides, preventing the tool holder assembly from tilting or deforming during the straightening process. The uprights can be fixed to the upper and lower slides by means of threaded connection, key connection, or interference fit, ensuring that they are perpendicular to the plane of the slide.

[0032] The drive unit consists of two symmetrically arranged cylinders, each positioned at one end of the base. The piston rods of the cylinders are connected to corresponding slides to enable bidirectional drive of the upper and lower slides. The cylinder bore, stroke, and working pressure need to be selected based on the actual corrective force and motion requirements.

[0033] The drive unit is typically equipped with a pneumatic control system, including an air source, air pressure regulating valve, solenoid directional valve, and air pipes. By controlling the switching of the solenoid directional valve, the extension and retraction of the cylinder can be controlled, thereby driving the upper and lower slides to move up and down. Control circuits can be designed according to actual needs to achieve single correction, continuous correction, or linkage control with other equipment.

[0034] The support plate is made of wear-resistant metal sheet with an array of station slots on its end face. These station slots are used to place the coil to be corrected. The shape and size of the station slots need to match the diameter and shape of the coil to ensure that the coil can be stably placed within it and to provide support for correction. The array distribution of the station slots can be designed according to actual needs.

[0035] In practice, the support plate is placed on the laser spot welding transport track, which is located between the upper and lower tool holders.

[0036] The opening penetrating the support plate is a long, narrow slot, with its length aligned with the width of the support plate and its depth aligned with the movement direction of the straightening block. The width of the opening needs to be greater than the width of the straightening block to allow the wedge-shaped tip of the straightening block to pass smoothly and act on the lead wire. The length of the opening needs to cover the straightening area of ​​the lead wire.

[0037] The limiting groove connecting the workstation slot and the opening primarily guides the lead wire into the straightening area and restricts its lateral movement during the straightening process. The width of the limiting groove needs to be greater than the diameter of the lead wire, but should be as small as possible to ensure that the lead wire does not deviate excessively during the straightening process.

[0038] The support plate is also equipped with positioning holes, the number and position of which need to be matched with the guide rods on the upper slide. The positioning holes require high precision to ensure that the support plate can be accurately positioned between the upper and lower tool holders.

[0039] The tool holder assembly includes an upper tool holder and a lower tool holder.

[0040] The upper tool holder is securely fixed to the upper slide using bolts, pins, or keys, ensuring its movement direction aligns with the upper slide. Several straightening blocks are located at the bottom of the upper tool holder, the number corresponding to the number of workstation slots on the support plate. The straightening blocks are made of high-hardness, wear-resistant material and are fixed to the upper tool holder using threaded connections, press-fit fits, or other detachable methods for easy replacement. The ends of the straightening blocks are wedge-shaped, their primary function being to straighten the lead wire by compressing it. The wedge-shaped tip has an equilateral triangular structure, which provides uniform compressive force and effectively straightens the lead wire. The side length and height of the equilateral triangle need to be precisely designed based on the diameter and material of the lead wire. The surface of the wedge-shaped tip requires precision grinding and polishing to minimize damage to the lead wire.

[0041] The lower tool holder is securely fixed to the lower slide block by bolts or other means, forming a vertically corresponding relationship with the upper tool holder. The main function of the lower tool holder is to provide support or reaction force for the straightening of the lead wire.

[0042] The support plate is located between the upper and lower tool holders, and the movement path of the wedge-shaped tip of the straightening block corresponds to the opening position of the support plate, ensuring that the straightening block can accurately pass through the opening and act on the lead wire located in the work station slot under the action of the drive unit.

[0043] The guide rod on the upper slide cooperates with the positioning hole on the support plate, which can guide the support plate to accurately enter the working position during the descent of the upper tool holder and prevent it from rotating or deviating, thus ensuring the alignment of the straightening block and the lead wire.

[0044] During this process, the coil lead to be corrected is placed in the work station slot of the carrier plate, and part of the lead will pass through the limiting slot into the opening area;

[0045] The carrier plate is placed between the upper and lower tool holders, and the guide rod on the upper slide will be inserted into the positioning hole of the carrier plate to ensure accurate positioning of the carrier plate.

[0046] When the drive unit is activated, both cylinders extend simultaneously, causing the upper slide and lower slide to move toward each other, resulting in the upper tool holder moving downward and the lower tool holder moving upward (or one of them remaining stationary while the other moves).

[0047] The wedge-shaped tip of the straightening block on the upper tool holder passes through the opening in the support plate and presses against both sides of the lead wire located in the work station slot.

[0048] Under the squeezing action of the wedge tip, the lead wire is forcibly squeezed and eventually straightened into a straight line. The lower cutter head provides support or reaction force for the straightening of the lead wire; the cylinder retracts, the upper slide and lower slide return to their original positions, and the straightened lead wire can then be removed.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser spot welding lead straightening device, characterized in that, include: The base has a vertically extending guide rail inside, and an upper slide seat and a lower slide seat are symmetrically slidably connected on the guide rail. The drive unit includes two symmetrically arranged cylinders, which are respectively located at both ends of the base, and the piston rod ends of the cylinders are connected to the corresponding slides. The bearing plate has arrayed workstation slots, an opening penetrating the plate body, and a limiting slot connecting the workstation slots and the opening on its end face. The tool holder assembly includes: The upper tool holder, which is fixedly connected to the upper slide, has several straightening blocks at its bottom, with wedge-shaped tips at the ends of the straightening blocks; The lower tool holder is fixedly connected to the lower slide block; The support plate is located between the upper and lower tool holders, and the movement path of the wedge-shaped tip of the straightening block corresponds to the opening position of the support plate.

2. The laser spot welding lead straightening device according to claim 1, characterized in that: The wedge-shaped tip of the corrective block has an equilateral triangular structure.

3. The laser spot welding lead straightening device according to claim 2, characterized in that: The opening of the bearing plate is a long, narrow groove, the depth of which is consistent with the moving direction of the correction block, and the width of the opening is greater than that of the correction block.

4. The laser spot welding lead straightening device according to claim 3, characterized in that: The support plate is also provided with positioning holes, which penetrate the support plate.

5. The laser spot welding lead straightening device according to claim 4, characterized in that: The upper slide is provided with a guide rod that matches the positioning hole.

6. The laser spot welding lead straightening device according to claim 5, characterized in that: The upper slide and lower slide are provided with several symmetrically arranged uprights.

7. The laser spot welding lead straightening device according to claim 2, characterized in that: The width of the limiting groove is greater than the diameter of the lead wire.

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