Spot welding chopper convenient for wire threading and wire feeding

Abstract

The utility model discloses a spot welding chopper convenient for wire threading and wire feeding, and relates to the technical field of spot welding choppers, the spot welding chopper comprises a chopper body, the chopper body comprises a chopper head and a chopper body, the annular side of one end, close to the chopper head, of the chopper body is provided with a mounting groove, the mounting groove extends towards one end of the chopper head, and a guide tube is arranged in the mounting groove; a tool nose is arranged at the end, away from the tool body, of the tool bit, a guide hole is formed in the tool bit, and the guide hole extends from one end of the guide pipe to one end of the tool nose. During welding and wire feeding, wires can be fed downwards through the guide pipe, directly reach the guide hole and then are fed to the welding face of a tool nose through the guide hole, a copper wire or a gold wire or a gold belt is guided and pointed, the copper wire or the gold wire or the gold belt is accurately conveyed to the welding face of the tool nose, and the welding efficiency and the welding effect are improved; and the requirements on workers are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding split knives, and specifically relates to a spot welding split knife convenient for wire threading and wire feeding. Background Art

[0002] The connection between the internal chip and the external pins in semiconductor packaging plays an important role in establishing the electrical connection between the chip and the outside and ensuring the smooth input / output between the chip and the outside world, and is the key in the entire back-end packaging process. Wire bonding dominates in the connection methods due to its simple process implementation, low cost, and applicability to various packaging forms. Wire bonding is one of the main interconnection technologies in packaging.

[0003] Among them, the spot welding split knife is an important tool in the wire bonding process. In the prior art, during the wire feeding process of the spot welding split knife, due to the absence of a wire guiding hole or groove, manual wire feeding is carried out from the side of the spot welding knife with tweezers, which makes the wire feeding extremely difficult and requires extremely high requirements for operators.

[0004] In view of this, there is an urgent need for a spot welding split knife convenient for wire threading and wire feeding to solve the above problems. Content of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model solves this problem with the following technical structure.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A spot welding split knife convenient for wire threading and wire feeding, comprising: a knife body, the knife body includes a knife head and a knife body, an installation groove is provided on the circumferential side of the knife body near the knife head, the installation groove extends towards the knife head end, and a guiding tube is arranged in the installation groove;

[0008] A knife tip is provided at the end of the knife head away from the knife body, a guiding hole is opened on the knife head, and the guiding hole extends from one end of the guiding tube towards the end of the knife tip.

[0009] Further features thereof are that,

[0010] One end of the guiding hole close to the guiding tube is in a flared shape.

[0011] A first inclined surface is provided on the circumferential side of the knife body at the opening of the installation groove, and the first inclined surface extends from the circumferential side of the knife body towards the inner side of the knife body on the side of the knife head.

[0012] Second inclined surfaces are provided on both sides of the first inclined surface of the knife body, and the second inclined surfaces extend from the circumferential side of the knife body towards the inner side of the knife body on the side of the knife head.

[0013] The guiding tube is a steel tube or a copper tube.

[0014] The end face of the tool tip is provided with a forming groove, and the outlet of the guiding hole is located within the forming groove.

[0015] One end of the end face of the tool tip, which is far from the guiding hole, is provided with a welding groove, and the welding groove communicates with the forming groove.

[0016] The material of the tool body is tungsten carbide.

[0017] The material of the tool body is titanium carbide.

[0018] The material of the tool body is ceramic.

[0019] Adopting the above structure of the present utility model can achieve the following beneficial effects:

[0020] When welding and feeding wire, wire can be fed downward through the guiding tube, directly reaching the guiding hole, and then sent to the welding surface of the tool tip through the guiding hole. It has a guiding and pointing effect on copper wire, gold wire or gold strip, enabling the copper wire, gold wire or gold strip to be accurately conveyed to the welding surface of the tool tip, improving the welding efficiency and welding effect, and reducing the requirements for the staff. Description of the Drawings

[0021] Figure 1 is the structural schematic diagram of this embodiment;

[0022] Figure 2 is Figure 1 the enlarged structural schematic diagram of part A in

[0023] Figure 3 is the structural sectional schematic diagram of a part of the tool body in this embodiment.

[0024] In the figure: 1, tool head; 2, tool body; 3, mounting groove; 4, guiding tube; 5, tool tip; 6, guiding hole; 7, first inclined surface; 8, second inclined surface; 9, forming groove; 10, welding groove. Detailed Embodiment

[0025] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0026] It should be noted that the terms "including" and "having" in the description, claims and the above-mentioned drawings of the present utility model, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or equipment.

[0027] The following will further elaborate on this application in conjunction with the attached Figures 1-3 drawings.

[0028] As Figures 1-3 shown, a spot welding splitting tool that facilitates wire threading and wire feeding includes: a tool body, the tool body includes a tool tip 1 and a tool shank 2. An installation groove 3 is provided on the circumferential side of one end of the tool shank 2 close to the tool tip 1, and the installation groove 3 extends towards one end of the tool tip 1. A guiding tube 4 is arranged in the installation groove 3; a tool tip 5 is provided at one end of the tool tip 1 away from the tool shank 2, and a guiding hole 6 is opened on the tool tip 1, and the guiding hole 6 extends from one end of the guiding tube 4 towards one end of the tool tip 5. In this way, when welding and feeding wire, the wire can be fed downward through the guiding tube 4, directly reach the guiding hole 6, and then be sent to the welding surface of the tool tip 5 through the guiding hole 6, which has a guiding and pointing effect on copper wire, gold wire or gold strip, so that the copper wire, gold wire or gold strip can be accurately conveyed to the welding surface of the tool tip 5, improving the welding efficiency and welding effect, and reducing the requirements for workers.

[0029] As Figure 3 shown, in order to facilitate the feeding of copper wire, gold wire or gold strip into the guiding hole 6, one end of the guiding hole 6 close to the guiding tube 4 is in a flared shape, further reducing the difficulty of wire feeding.

[0030] As Figure 1 shown, in order to reduce the interference with other components during the processing, a first inclined surface 7 is provided on the circumferential side of the tool shank 2 at the opening of the installation groove 3, and the first inclined surface 7 extends from the circumferential side of the tool shank 2 towards the inner side of the tool body on the side of the tool tip 1; second inclined surfaces 8 are provided on both sides of the tool shank 2 of the first inclined surface 7, and the second inclined surfaces 8 extend from the circumferential side of the tool shank 2 towards the inner side of the tool body on the side of the tool tip 1. In this way, one end of the tool shank 2 converges towards one end of the tool tip 1, reducing the volume of the tool shank 2 close to one end of the tool tip 1 and reducing the interference during processing.

[0031] Furthermore, the guiding tube 4 can be made of steel pipe or copper pipe, and the specific material selection is adaptively selected according to the production and processing conditions.

[0032] As Figure 2 and Figure 3As shown, during welding, if there are other wires between the chip and the wire or an arc needs to be formed to avoid circuit short circuit, the existing spot welding knife can only rely on manual arcing with tweezers, and then spot welding with the spot welding knife, which is very inconvenient. Therefore, a molding groove 9 is provided on the end face of the knife tip 5, and the outlet of the guide hole 6 is located in the molding groove 9, so that the welding material can form an arc in the molding groove 9 on the welding surface of the knife tip 5 (the existing welding surface of the knife tip 5 is generally a plane), and in order to facilitate the positioning and restriction of the welding material, a welding groove 10 is provided at the end of the end face of the knife tip 5 away from the guide hole 6, and the welding groove 10 is connected with the molding groove 9, and the position is restricted by the welding groove 10 being larger than the welding material.

[0033] Further optimization is that the material of the blade body can be tungsten carbide, titanium carbide, ceramic or ceramic metal, among which tungsten carbide has strong resistance to breakage; titanium carbide has better performance in transmitting ultrasonic waves; and ceramics are smoother, denser, non-porous and chemically stable. In addition, the thermal conductivity of ceramic splitting knives is low, and the splitting knives themselves do not need to be heated.

[0034] In summary, when feeding the wire for welding, the wire can be fed downward through the guide tube 4 to directly reach the guide hole 6, and then sent to the welding surface of the blade tip 5 through the guide hole 6, which has a guiding and directional effect on the copper wire, gold wire or gold ribbon, so that the copper wire, gold wire or gold ribbon can be accurately transported to the welding surface of the blade tip 5, thereby improving the welding efficiency and welding effect and reducing the requirements for the staff.

[0035] The above are only preferred embodiments of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. A spot welding cutter that is convenient for wire threading and feeding, characterized in that: include: A knife body, the knife body comprising a knife head (1) and a knife body (2), a mounting groove (3) being arranged on a ring side of one end of the knife body (2) close to the knife head (1), the mounting groove (3) extending towards one end of the knife head (1), and a guide tube (4) being arranged in the mounting groove (3); A blade tip (5) is provided at one end of the blade head (1) away from the blade body (2), and a guide hole (6) is provided on the blade head (1), wherein the guide hole (6) extends from one end of the guide tube (4) to one end of the blade tip (5).

2. A spot welding cutter for facilitating wire feeding according to claim 1, characterized in that: The end of the guide hole (6) close to the guide tube (4) is in a trumpet shape.

3. A spot welding cutter for facilitating wire feeding according to claim 1, characterized in that: The blade body (2) is provided with a first inclined surface (7) on the ring side of the opening of the mounting groove (3), and the first inclined surface (7) extends from the ring side of the blade body (2) to one side of the blade head (1) and toward the inner side of the blade body.

4. A spot welding cutter for facilitating wire feeding according to claim 3, characterized in that: The blade body (2) is provided with second bevels (8) on both sides of the first bevel (7), and the second bevels (8) extend from the ring side of the blade body (2) to one side of the blade head (1) towards the inner side of the blade body.

5. A spot welding cutter for facilitating wire feeding according to claim 4, characterized in that: The guide pipe (4) is a steel pipe or a copper pipe.

6. A spot welding cutter for facilitating wire feeding according to claim 1, characterized in that: The end surface of the knife tip (5) is provided with a molding groove (9), and the outlet of the guide hole (6) is located in the molding groove (9).

7. A spot welding cutter for facilitating wire feeding according to claim 6, characterized in that: A welding groove (10) is provided at one end of the end surface of the knife tip (5) away from the guide hole (6), and the welding groove (10) is connected to the molding groove (9).

8. A spot welding cutter for facilitating wire feeding according to claim 1, characterized in that: The material of the knife body is tungsten carbide.

9. A spot welding cutter for facilitating wire feeding according to claim 1, characterized in that: The material of the knife body is titanium carbide.

10. A spot welding cutter for facilitating wire feeding according to claim 1, characterized in that: The material of the knife body is ceramic or ceramic metal.

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