CN220971022U

CN220971022U - Spot welding head for spot welding device and handheld spot welding device

Info

Publication number: CN220971022U
Application number: CN202322772376.1U
Authority: CN
Inventors: 刘茂源; 彭文
Original assignee: Qingdao Cosino Innovation Technology Co ltd
Current assignee: Qingdao Cosino Innovation Technology Co ltd
Priority date: 2023-05-18
Filing date: 2023-10-16
Publication date: 2024-05-17
Anticipated expiration: 2033-10-16
Also published as: CN220971023U; CN116511637A; CN220943585U

Abstract

The utility model discloses a spot welding head for a spot welding device and a handheld spot welding device, belongs to the technical field of electronic circuit welding, and is designed for solving the problems that a workpiece to be welded cannot be stably pressed and the like. The utility model discloses a spot welding head for a spot welding device, which comprises a welding head main body and two polar posts, wherein the two polar posts are arranged at intervals and are respectively connected to the welding head main body, the bottom of the welding head main body is respectively provided with a first welding surface and a second welding surface, one of the first welding surface and the second welding surface is provided with a fixing groove, and the fixing groove is used for fixing a piece to be welded. According to the spot welding head for the spot welding device and the welding surface of the handheld spot welding device, the fixing groove is formed, the to-be-welded piece can be fixed by the fixing groove, the to-be-welded piece cannot move before welding flux is condensed, and the welding success rate is improved. Through setting up the fixed slot, the flow of spot welding wire rod just can easily be accomplished to one hand, uses to experience well, and welding efficiency is high.

Description

Spot welding head for spot welding device and handheld spot welding device

Technical Field

The utility model relates to the technical field of electronic circuit welding, in particular to a spot welding head for a spot welding device and a handheld spot welding device.

Background

The electronic element and the wire are mainly connected in a soldering way, and as the size and the density of the circuit board components are smaller and larger, the volume of the welding head is required to be small enough to extend into gaps among the components; the soldering tip cannot be infinitely small (e.g., needle-like) or else the solder cannot be melted quickly using high temperatures.

The bottom end of a welding head of the conventional micro spot welding device is basically triangular, two polar posts are arranged at the upper end of the welding head, the two polar posts are respectively connected to a power supply, and the power supply transmits pulse current to the welding head, so that high temperature enough to melt solder is formed at the bottom end of the welding head, and the welding efficiency is high; after the power supply stops supplying current to the welding head, the welding head is gradually cooled, the welding head does not need to be lifted at the moment, the welding head does not influence the cooling and condensation of the welding flux when the welding head is used for assisting in pressing the to-be-welded piece, the to-be-welded piece can be ensured not to move, and the welding is more stable.

The defects of the micro spot welding device include: when the bottom end of the welding head cannot well fix a piece to be welded, especially when the piece to be welded is a columnar body (such as a wire rod), the bottom end of the welding head is easily pushed away from the original position due to the pressing of the bottom end of the welding head, so that the welding quality is affected.

Disclosure of utility model

The utility model aims to provide a spot welding head for a spot welding device and a hand-held spot welding device, which solve the problem that a workpiece to be welded cannot be stably pressed and are more convenient to use.

In order to achieve the purpose, on one hand, the utility model adopts the following technical scheme:

The spot welding head for the spot welding device comprises a welding head main body and two polar posts, wherein the two polar posts are arranged at intervals and are respectively connected to the welding head main body, a first welding surface and a second welding surface are respectively arranged at the bottom of the welding head main body, a fixing groove is formed in one of the first welding surface and the second welding surface, and the fixing groove is used for fixing a piece to be welded.

In one preferred embodiment, the fixing groove is arc-shaped, and the diameter R of the fixing groove is between 0.1mm and 0.3 mm; and/or, the notch width Lq of the fixing groove is 0.2mm plus or minus 0.05mm.

In one preferred embodiment, an angle α e [20 °,80 ° ] between at least one of the first welding surface and the second welding surface and a center line of the spot welding head.

In one preferred embodiment, the first and second welding surfaces are equally wide, and the width Lk of the welding head body gradually decreases in a direction from the post toward the welding head body.

In one preferred embodiment, the first and second welding surfaces have a minimum width Lz of the welding head body, lz being 0.5mm±0.1mm.

In one preferred embodiment, the length Lc of the first and second welding surfaces is 0.7mm±0.15mm.

In one preferred embodiment, a cutting edge is formed between the other of the first and second welding surfaces and the adjacent side surface, the cutting edge being usable for cutting wire.

In one preferred embodiment, the other of the first and second welding surfaces is at a 90 ° angle to the adjacent side surface.

In one preferred embodiment, a slit is formed in the middle of the spot welding head, the slit is located between two poles and extends into the welding head main body, and a distance La between the slit end and the first welding surface is between 0.1mm and 0.5 mm.

On the other hand, the utility model adopts the following technical scheme:

the handheld spot welding device comprises a power supply and a control circuit board, and further comprises the spot welding head for the spot welding device, wherein two polar posts are respectively connected to the power supply and the control circuit board, and the power supply can transmit pulse current to the welding head main body through the polar posts.

The welding surface of the spot welding head for the spot welding device is provided with the fixing groove, the fixing groove can fix the piece to be welded, the piece to be welded cannot move before welding flux is condensed, and the welding success rate is improved. The problem of need one hand control wait to weld the wire rod among the prior art, the welding set leads to the operation difficulty is held to the other hand, through setting up the fixed slot, the flow of spot welding wire rod just can easily be accomplished to one hand, use experience is good, welding efficiency is high.

The handheld spot welding device disclosed by the utility model comprises the spot welding head for the spot welding device, does not need to be held, does not move the to-be-welded piece in the whole welding process, avoids the to-be-welded piece from leaving the welding position, and has high welding success rate.

Drawings

FIG. 1 is a front view of a spot welding head provided in accordance with an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a side view of a spot welding head provided in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic view of a spot welding head according to an embodiment of the present utility model in use;

FIG. 5 is a schematic view of another use of a spot welding head according to an embodiment of the present utility model;

fig. 6 is a front view of a second bonding surface provided in accordance with an embodiment of the present utility model.

In the figure:

1. A welding head main body; 2. a pole; 11. a first welding surface; 12. a second welding surface; 13. a fixing groove; 14. a slit; 15. cutting edges.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The present embodiment discloses a spot welding head for a spot welding device and a hand-held spot welding device including the spot welding head, and as shown in fig. 1 to 3, the spot welding head for a spot welding device includes a welding head main body 1 and two poles 2, and the two poles 2 are provided at a distance from each other and are connected to the welding head main body 1. The bottom of the welding head body 1 is provided with a first welding surface 11 and a second welding surface 12, respectively, and a fixing groove 13 is formed in one of the first welding surface 11 and the second welding surface 12. The hand-held spot welding apparatus further includes a power source (not shown) and a control circuit board (not shown) to which the two poles 2 are connected, respectively, the power source being capable of supplying a pulse current to the welding head main body 1 through the poles 2. The control circuit board can be a centralized or distributed controller, for example, the controller can be a single-chip microcomputer or a plurality of distributed single-chip microcomputers, and a control program can be run in the single-chip microcomputers so as to control devices such as a power supply and the like to realize the functions of the single-chip microcomputers.

The fixing groove 13 is a groove-shaped structure with one end open, and can be used for fixing a piece to be welded. Particularly, when the workpiece to be welded is a columnar body, the fixing groove 13 can clamp the workpiece to be welded in the radial direction, and the welding head main body 1 applies downward force, so that the workpiece to be welded can be stably fixed. Before the welding work is finished (namely before the welding flux is condensed), the part to be welded cannot move, and the welding success rate is improved. The problem of need one hand control wait to weld the wire rod among the prior art, the welding set leads to the operation difficulty is held to the other hand, through setting up fixed slot 13, the flow of spot welding wire rod just can be easily accomplished to one hand, use experience is good, welding efficiency is high.

The power supply supplies a pulse current to the head body 1 as needed, and stops supplying power after the solder is melted, so that the spot welding head does not lift up and the condensation of the solder is not affected. The spot welding head continuously presses the workpiece to be welded, and simultaneously presses condensate of the solder, so that the height of the condensate of the solder can be effectively reduced, the welding height is controlled to be lower than that of the original welded workpiece, the height of a finished product cannot be increased, ultrathin products can be processed, and the competitiveness of the products is improved. In addition, the spot welding device can control the solder amount more accurately than other welding appliances, and further reduce the height of solder condensate.

The specific shape of the fixing groove 13 is not limited, and the member to be welded may be fixed. In this embodiment, the fixed slot 13 is arc, and processing is convenient, and the columnar of multiple specification waits to weld the piece and can closely butt on the internal surface of fixed slot 13, and fixed effect is better.

The specific size of the fixing groove 13 is not limited and may be determined according to actual use requirements. In this embodiment, the diameter R of the fixing groove 13 is between 0.1mm and 0.3mm, the notch width Lq of the fixing groove 13 is 0.2mm±0.05mm, wires used in electronic circuit welding can be basically clamped into the fixing groove 13, the application range is wide, and the positions of the wires in the welding process are stable.

On the basis of the above structure, an included angle α∈ [20 °,80 ° ] between at least one of the first welding surface 11 and the second welding surface 12 and the center line of the spot welding head. In this embodiment, the angle α e [20 °,80 ° ] between the first welding surface 11 and the center line of the spot welding head. The first welding surface 11 is basically parallel to the surface of the workpiece to be welded during welding, the main body of the handheld spot welding device is inclined, and a user can grasp the spot welding device like a reading pen, so that the handheld spot welding device accords with human engineering, is more convenient to use and has low labor intensity.

The first welding surface 11 and the second welding surface 12 are substantially perpendicular to each other, and as shown in fig. 4, when the first welding surface 11 is welded, the second welding surface 12 is substantially vertical, so that the adjacent components can be laterally welded with wires. Similarly, as shown in fig. 5, when the second welding surface 12 is welded, the first welding surface 11 is substantially vertical, and other components can be welded laterally.

The chip density of the components of the modern electronic circuit (mainly comprising a Printed Circuit Board (PCB)) is higher and higher, the mutual distance of each component in the electronic circuit is short, the volume of a piece to be welded is small, the welding head is difficult to extend into a narrow space due to the characteristics, the surrounding components can be influenced by high temperature generated by welding, and the welding difficulty is high.

As shown in fig. 1 to 3, the first bonding surface 11 and the second bonding surface 12 are equal in width, and the problem that the first bonding surface is too wide to be inserted into a narrow gap between components is avoided. The width Lk of the head main body 1 gradually decreases in the direction from the post 2 toward the head main body 1. The width of the first welding surface 11 and the second welding surface 12 is the minimum width Lz of the welding head body 1, and Lz is 0.5mm±0.1mm in this embodiment.

The part of the welding head main body 1, which is close to the pole post 2, is wider and has high strength, so that the service life of the spot welding head can be prolonged; the part of the welding head main body 1, which is close to the part to be welded, is relatively narrow, can extend into a narrow gap between components, and has wide application range and convenient use. The width Lz of the first welding surface 11 and the second welding surface 12 is 0.5mm plus or minus 0.1mm, so that the peripheral components can be kept away as far as possible, the influence of welding high temperature on the peripheral components is reduced, the first welding surface 11 and the second welding surface 12 are prevented from being too wide to collide with the peripheral components, and the peripheral components are prevented from being damaged due to collision.

The length Lc of the first welding surface 11 and the second welding surface 12 is 0.7mm + -0.15 mm, and the entire width Lh of the spot welding head is 1mm + -0.1 mm. The welding surface size of 0.7mm multiplied by 0.5mm can accurately control the welding interface so as to meet the wire welding work requirements of various micro component bonding pads and conveniently and flexibly weld micro objects.

On the basis of the structure, a slit 14 is formed in the middle of the spot welding head, and the slit 14 is positioned between the two polar posts 2, so that the two polar posts 2 are mutually insulated. The tail end of the slit 14 extends into the welding head main body 1 to divide the upper part of the welding head main body 1 into two pieces, and the two pieces of structures are mutually insulated, so that all current flows to the joint of the bottommost part of the welding head main body 1, the welding energy utilization rate is high, the comprehensive power consumption is far lower than that of a traditional soldering iron, and the welding head is low-carbon and environment-friendly.

In this embodiment, the distance La between the end of the slit 14 and the first welding surface 11 is between 0.1mm and 0.5mm, so that the processing is more convenient, the instantaneous energy of welding is concentrated at the joint of the bottommost part of the welding head main body 1, the heating speed is high, the welding flux melting efficiency is high, the instantaneous energy consumption of welding is reduced, and the energy loss outside welding is reduced.

As shown in fig. 6, a cutting edge 15 is formed between the other of the first welding surface 11 and the second welding surface 12 and the adjacent side surface, and the cutting edge 15 can be used for cutting fine wires, so that the length of the welding wires can be controlled conveniently, and the use is more convenient.

The specific form of the cut edge 15 is not limited, and the cut wire may be cut. In the embodiment, an included angle of 90 degrees is formed between the other one of the first welding surface 11 and the second welding surface 12 and the adjacent side surface, so that the processing is convenient; the cutting edge 15 is sharper and has a strong cutting ability.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, and that various obvious changes, modifications and substitutions may be made therein without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the above embodiments, but may be embodied in many other equivalent forms without departing from the spirit of the utility model, the scope of which is set forth in the appended claims.

Claims

1. Spot welding head for spot welding device, including bonding tool main part (1) and two utmost point posts (2), two utmost point posts (2) interval set up and be connected to respectively bonding tool main part (1), the bottom of bonding tool main part (1) is provided with first welding face (11) and second welding face (12) respectively, its characterized in that first welding face (11) with set up fixed slot (13) on one of them of second welding face (12), fixed slot (13) are used for fixed the weldment that waits.

2. Spot welding head for spot welding devices according to claim 1, characterized in that the fixing groove (13) is arc-shaped, the diameter R of the fixing groove (13) being between 0.1mm and 0.3 mm; and/or the number of the groups of groups,

The notch width Lq of the fixed groove (13) is 0.2mm plus or minus 0.05mm.

3. Spot welding head for a spot welding device according to claim 1, characterized in that the angle a e [20 °,80 ° ] between the midline of the spot welding head and at least one of the first welding surface (11) and the second welding surface (12).

4. A spot welding head for a spot welding device according to any one of claims 1 to 3, wherein the first welding surface (11) and the second welding surface (12) are equally wide, and the width Lk of the welding head body (1) gradually decreases in a direction from the post (2) toward the welding head body (1).

5. Spot welding head for spot welding device according to claim 4, characterized in that the width of the first welding surface (11) and the second welding surface (12) is the minimum width Lz of the welding head body (1), lz being 0.5mm±0.1mm.

6. A spot welding head for a spot welding device according to any one of claims 1 to 3, characterized in that the length Lc of the first welding surface (11) and the second welding surface (12) is 0.7mm ± 0.15mm.

7. A spot welding head for a spot welding device according to any one of claims 1 to 3, characterized in that a cutting edge (15) is formed between the other of the first welding surface (11) and the second welding surface (12) and the adjacent side surface, which cutting edge (15) can be used for cutting wire.

8. Spot welding head for a spot welding device according to claim 7, characterized in that the other of the first welding surface (11) and the second welding surface (12) is at an angle of 90 ° to the adjacent side.

9. A spot welding head for a spot welding device according to any one of claims 1 to 3, characterized in that a slit (14) is formed in the middle of the spot welding head, the slit (14) being located between two of the poles (2) and extending into the welding head body (1), the distance La between the slit (14) tip and the first welding surface (11) being between 0.1mm and 0.5 mm.

10. A hand-held spot welding device comprising a power supply and a control circuit board, characterized in that it further comprises a spot welding head for a spot welding device according to any one of claims 1 to 9, to which two poles (2) are connected respectively, said power supply being capable of delivering a pulsed current to the welding head body (1) via said poles (2).