Deep cavity welding chopper with detachable cutter head

Abstract

The utility model discloses a deep cavity welding chopper with a detachable chopper head, and relates to the technical field of welding choppers, the deep cavity welding chopper comprises a chopper body, the chopper body comprises a chopper head and a chopper bar, one end of the chopper bar is provided with a clamping groove, one end of the chopper head is provided with a protruding part, the protruding part is inserted into the clamping groove, and one end, far away from the chopper bar, of the chopper head is provided with a chopper point; a first straight through hole extending in the axial direction of the cutter body is formed in the cutter bar in a penetrating mode, a second straight through hole extending in the axial direction of the cutter body is formed in the cutter head in a penetrating mode, and the first straight through hole is communicated with the second straight through hole. According to the deep-cavity welding chopper, the integrated chopper body is changed into the mode that the chopper bar and the chopper head are detachably connected through the embedded structure, the chopper type and the model number of the chopper can be flexibly changed, meanwhile, when the chopper head is normally abraded and accidentally crashed, the damaged chopper head can be rapidly replaced, a new chopper head and a new chopper bar can be rapidly assembled, and a new deep-cavity welding chopper is formed; the machining efficiency is improved, and the machining cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding splitters, in particular to a deep cavity welding splitter with a detachable cutter head. Background Art

[0002] The connection between the chip inside the semiconductor package and the external pins 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. It is the key to the entire back-end packaging process. Wire bonding is a dominant connection method due to its simple process, low cost, and applicability to a variety of packaging forms. Wire bonding is one of the main interconnection technologies in packaging. Other technologies include flip chip, wafer-level packaging, and through silicon via technology. Wire bonding is a process that uses thin metal wires and uses heat, pressure, and ultrasonic energy to tightly weld the metal leads to the substrate pads to achieve electrical interconnection between the chip and the substrate and information exchange between the chips. The shapes of the bonding points of wire bonding are mainly spherical and wedge-shaped. Under ideal control conditions, electron sharing or atomic diffusion will occur between the leads and the substrate, thereby achieving atomic-level bonding between the two metals.

[0003] Among them, the splitter is an important tool in the wire bonding process. The wire passes through the wire threading hole on the splitter and reaches the working surface of the blade tip. The working surface of the blade tip presses the wire onto the chip pad. Through the action of ultrasonic vibration and pressure, the wire and the pad form atomic bonding, thereby forming a stable and reliable solder joint between the wire and the chip pad. When the traditional deep cavity welding splitter used for microelectronic micro-connection welding is used to weld gold wire (aluminum wire) and gold strip (aluminum strip), the blade tip and the blade body are integrally formed or brazed together to form a splitter as a whole. The material is metallized ceramics such as tungsten carbide or titanium carbide, and the normal loss of the splitter is tip wear or tip chipping. Since the splitter is an integrated structure, once the blade tip is worn or the blade tip is chipped, the splitter as a whole is scrapped, resulting in high processing costs.

[0004] In view of this, there is an urgent need for a deep cavity welding splitter with a detachable cutter head to solve the above problems. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model solves the problems with the following technical structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A deep cavity welding splitter with a detachable cutter head, comprising: a cutter body, the cutter body comprising a cutter head and a cutter bar, one end of the cutter bar being provided with a slot, one end of the cutter head being provided with a convex portion, the convex portion being inserted into the slot, and one end of the cutter head being provided with a cutter tip away from the cutter bar;

[0008] The knife rod is provided with a first through hole extending along the axial direction of the knife body, and the knife head is provided with a second through hole extending along the axial direction of the knife body, and the first through hole is connected with the second through hole.

[0009] Its further characteristic is that

[0010] The cutter head is provided with a first inclined surface, and the first inclined surface extends from the ring side of the cutter head to the side of the cutter tip toward the inner side of the cutter body.

[0011] The knife rod is provided with a second inclined surface on both sides of the first inclined surface, and the second inclined surface extends from the ring side of the knife head to the side of the knife tip toward the inner side of the knife body.

[0012] A guide hole is arranged at one end of the cutter head close to the cutter tip, and the guide hole extends from a side close to the second through hole to a side of the cutter tip.

[0013] The cross sections of the clamping groove and the protruding portion along the axial direction of the cutter body are both square.

[0014] The edges of the protruding parts are all provided with chamfers.

[0015] The annular side of the knife rod is oppositely provided with a flat surface extending along the axial direction of the knife body, and the two flat surfaces are parallel to a group of groove walls that are opposite to the groove in the annular direction.

[0016] The knife bar is made of die steel.

[0017] The cutter head is made of tungsten carbide.

[0018] The cutter head is made of titanium carbide.

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

[0020] By changing the integrated blade body to a detachable inlaid structure connection between the blade rod and the blade head, the blade type and model of the splitting knife can be flexibly changed. At the same time, when the blade head is normally worn or accidentally chipped, the damaged blade head can be quickly replaced, and a new blade head and blade rod can be quickly assembled to form a new deep cavity welding splitting knife, which improves processing efficiency and reduces processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 This is an enlarged schematic diagram of the structure of the tool bar in this embodiment;

[0023] Figure 3 Schematic diagram of the structure of the cutter head in this embodiment.

[0024] In the figure: 1, cutter head; 2, cutter bar; 3, slot; 4, raised portion; 5, first straight through hole; 6, second straight through hole; 7, cutter tip; 8, first inclined surface; 9, second inclined surface; 10, guide hole; 11, flat surface. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

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

[0027] The following is combined with Figure 1-3 This application is described in further detail.

[0028] like Figure 1-2 As shown, a deep cavity welding splitting knife with a detachable blade head comprises: a blade body, the blade body comprises a blade head 1 and a blade rod 2, a slot 3 is provided at one end of the blade rod 2, a protrusion 4 is provided at one end of the blade head 1, the protrusion 4 is inserted into the slot 3, and a blade tip 7 is provided at the end of the blade head 1 away from the blade rod 2; a first straight through hole 5 extending along the axial direction of the blade body is penetrated on the blade rod 2, and a second straight through hole 6 extending along the axial direction of the blade body is penetrated on the blade head 1, and the first straight through hole 5 is connected with the second straight through hole 6 (for passing wire material). In this way, by changing the integrated blade body into a detachable inlay structure connection between the blade rod 2 and the blade head 1, the blade type and model of the splitting knife can be flexibly changed. At the same time, when the blade head 1 is normally worn or accidentally chipped, the damaged blade head 1 can be quickly replaced, and the new blade head 1 and the blade rod 2 can be quickly assembled to form a new deep cavity welding splitting knife, thereby improving processing efficiency and reducing processing costs.

[0029] like Figure 1 and Figure 3As shown, the cutter head 1 is provided with a first bevel 8, which extends from the ring side of the cutter head 1 to the side of the cutting tip 7 toward the inner side of the cutter body; the cutter rod 2 is provided with a second bevel 9 on both sides of the first bevel 8, which extends from the ring side of the cutter head 1 to the side of the cutting tip 7 toward the inner side of the cutter body, so that one end of the cutter head 2 is converged to the end of the cutting tip 7, thereby reducing the volume of the cutter rod 2 close to the end of the cutter head 1 and reducing interference during processing.

[0030] like Figure 1 and Figure 3 As shown, a guide hole 10 is provided at one end of the cutter head 1 close to the cutting tip 7, and the guide hole 10 extends from the side close to the second straight through hole 6 to the side of the cutting tip 7, so that the wire from the second straight through hole 6 is guided to the cutting tip 7 for easy processing.

[0031] like Figure 1 and Figure 2 As shown, in order to facilitate quick tool installation and positioning, the cross-sections of the slot 3 and the protrusion 4 along the axial direction of the tool body are both square, the edges of the protrusion 4 are all chamfered, and the annular side of the arbor 2 is relatively provided with a flat surface 11 extending along the axial direction of the tool body, and the two flat surfaces 11 are parallel to a set of groove walls opposite to the annular direction of the slot 3. In this way, since the inlaid parts are in a square and tightly matched relationship, and the arbor 2 is a symmetrical double-flat structure (the flat surfaces 11 match the specific shapes of the slot 3 and the protrusion 4), it means that when the cutter head 1 and the arbor 2 are plugged in, it only needs to match one of the flat surfaces 11 with one side of the protrusion 4 to complete the plug-in, and achieve fast and accurate positioning.

[0032] A further optimization is that the tool rod 2 is made of mold steel. The tool rod 2 is made of mold steel and can be made by traditional machining methods. Compared with normal chopping knife materials "metallized ceramics such as tungsten carbide or titanium carbide", the tool rod 2 is much easier to make, but it also has sufficient strength and wear resistance and a longer service life.

[0033] It is further optimized that the cutter head 1 is made of tungsten carbide or titanium carbide. The cutter head 1 is made of metallized ceramics such as tungsten carbide or titanium carbide, so that the cutter head 1 has the advantages of high hardness, good wear resistance, and long service life.

[0034] In summary, by changing the integrated blade body to a detachable inlay structure connection between the blade rod 2 and the blade head 1, the blade type and model of the splitting knife can be flexibly changed. At the same time, when the blade head 1 is normally worn or accidentally damaged, the damaged blade head 1 can be quickly replaced, and a new blade head 1 and the blade rod 2 can be quickly assembled to form a new deep cavity welding splitting knife, thereby improving processing efficiency and reducing processing costs.

[0035] This convenience of conveniently replacing the blade head 1 is particularly helpful for verifying the specific type of splitting knife required when the chip size, pad size and pad solderability are uncertain during research and development. Since the deep cavity welding splitting knife that is integral or brazed with the blade head 1 and the blade rod 2 and cannot be disassembled has a long processing cycle, a long delivery time and a high price, when there is uncertainty about the chip size, pad size and pad solderability during research and development, the traditional method is to stock various splitting knives that may be needed. The detachable inlay structure can be based on temporary situations, without the need to stock various splitting knives, only various blade heads 1 need to be stored, and the blade heads 1 can be quickly replaced when needed to meet the quick needs of research and development.

[0036] The double-flat structure of the tool bar 2 is not only conducive to the rapid installation of the cutter head 1, but also the cutter head 1 can be installed into the tool bar 2 by rotating 180 degrees forward and reverse, so that the avoidance structure of the cutter head 1 can be fully utilized to improve the anti-interference ability of the tool.

[0037] 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 deep cavity welding wedge with a detachable blade, characterized in that: include: A knife body, the knife body comprising a knife head (1) and a knife rod (2), one end of the knife rod (2) being provided with a slot (3), one end of the knife head (1) being provided with a protrusion (4), the protrusion (4) being inserted into the slot (3), and the end of the knife head (1) being away from the knife rod (2) being provided with a knife tip (7); The knife rod (2) is provided with a first straight hole (5) extending axially along the knife body, and the knife head (1) is provided with a second straight hole (6) extending axially along the knife body, and the first straight hole (5) is connected to the second straight hole (6).

2. The deep cavity welding wedge with a detachable blade according to claim 1, characterized in that: The cutter head (1) is provided with a first inclined surface (8), which extends from the ring side of the cutter head (1) to the side of the cutter tip (7) towards the inner side of the cutter body.

3. The deep cavity welding wedge with a detachable blade according to claim 2, characterized in that: The knife rod (2) is provided with second inclined surfaces (9) on both sides of the first inclined surface (8), and the second inclined surface (9) extends from the ring side of the knife head (1) to the side of the knife tip (7) towards the inner side of the knife body.

4. The deep cavity welding wedge with a detachable blade according to claim 1, characterized in that: A guide hole (10) is provided at one end of the cutter head (1) close to the cutter tip (7), and the guide hole (10) extends from a side close to the second through hole (6) to a side of the cutter tip (7).

5. The deep cavity welding wedge with a detachable blade according to claim 1, characterized in that: The cross sections of the clamping groove (3) and the raised portion (4) along the axial direction of the knife body are both square.

6. The deep cavity welding wedge with a detachable blade according to claim 5, characterized in that: The edges of the protruding portion (4) are all provided with chamfers.

7. The deep cavity welding wedge with a detachable blade according to claim 5, characterized in that: The circumferential side of the knife rod (2) is provided with a flat surface (11) extending along the axial direction of the knife body, and the two flat surfaces (11) are parallel to a group of groove walls of the clamping groove (3) that are circumferentially opposite to each other.

8. The deep cavity welding wedge with a detachable blade according to claim 1, characterized in that: The knife bar (2) is made of die steel.

9. The deep cavity welding wedge with a detachable blade according to claim 1, characterized in that: The cutter head (1) is made of tungsten carbide.

10. The deep cavity welding wedge with a detachable blade according to claim 1, characterized in that: The cutter head (1) is made of titanium carbide.

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