Wire welding machine

Abstract

The utility model discloses a wire welding machine, which comprises a welding wire fixing device, an energy converter and a product fixing device used for fixing a product to be subjected to wire welding, a cooling cover is arranged at the energy converter, the cooling cover is positioned between the product fixing device and the welding wire fixing device, the cooling cover is provided with a cooling air channel, and the cooling air channel is communicated with the energy converter. A cooling air outlet of the cooling air channel is located in the transverse side of the cooling cover, the air outlet direction is arranged in the direction deviating from the product fixing device, and an air outlet path avoids the welding wire fixing device. The air outlet direction of the cooling air outlet of the cooling air channel is arranged in the direction deviating from the product fixing device, so that the influence on an air film at the product fixing device is effectively reduced, and the phenomenon that a product is easily oxidized when the wire welding machine is used for welding is effectively avoided. Meanwhile, the air body is not completely deviated and avoids the welding wire fixing device, so that the air body can be far away from the cooling cover as soon as possible, and the cooling efficiency of the cooling cover is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductors, and more specifically to a wire bonding machine. Background Art

[0002] The current wire bonding machine mainly includes a pressure plate, a transducer and a wire clamp which are arranged in sequence from bottom to top, wherein the pressure plate is used to press the product, the front end of the transducer has a welding needle, and the wire clamp is mainly used to clamp the welding wire to be welded.

[0003] The transducer is generally in a high temperature state when in use, so a cooling hood needs to be provided on the transducer. The transducer is generally inserted into the cooling hood. A cooling air channel is provided on the cooling hood, and a cooling air inlet and a cooling air outlet are formed correspondingly, wherein the cooling air inlet and the cooling air outlet are respectively provided on both sides of the cooling hood in the horizontal direction.

[0004] After long-term practice, the inventors found that in actual applications, the cooling air outlet is generally set open to blow air directly to the outside. At the same time, when in use, it is generally necessary to blow inert gas to the pressure plate to form a gas film near the product. However, since the transducer and the pressure plate are very close, when high-speed gas flows out of the cooling air outlet, a jet is formed, which will cause changes in the nearby gas, resulting in a thin gas film and gas turbulence, which leads to frame oxidation problems in the product.

[0005] In summary, how to effectively solve the problem of product oxidation that is prone to occur during welding by a wire bonding machine is a problem that technicians in this field urgently need to solve. Utility Model Content

[0006] In view of this, an object of the present invention is to provide a wire bonding machine, which can effectively solve the problem of product oxidation that is prone to occur during welding by the wire bonding machine.

[0007] In order to achieve the above object, the utility model provides the following technical solutions:

[0008] A wire bonding machine comprises a wire bonding fixture, a transducer and a product fixing device for fixing a product to be bonded, wherein a cooling hood is arranged at the transducer, the cooling hood is located between the product fixing device and the wire bonding fixture, the cooling hood is provided with a cooling air channel, the cooling air outlet of the cooling air channel is located on one lateral side of the cooling hood, and the air outlet direction is arranged in a direction deviating from the product fixing device, and the air outlet path avoids the wire bonding fixture.

[0009] In the above-mentioned wire welding machine, when in use, the cooling air enters the cooling air duct through the cooling air inlet, absorbs heat in the cooling air duct, and then blows out from the cooling air outlet. Under the action of inertia, it moves along the direction of the cooling air outlet. During the movement, the distance between the product fixing device and the wind body becomes farther and farther, and the influence on the air film at the product fixing device is reduced. And by avoiding the welding wire fixing device, it can be ensured that the wind body quickly moves away from the cooling cover. In the above-mentioned wire welding machine, by setting the air outlet direction of the cooling air outlet of the cooling air channel to deviate from the product fixing device, the influence on the air film at the product fixing device can be effectively reduced, thereby effectively avoiding the easy occurrence of product oxidation during welding of the wire welding machine. At the same time, it is not completely deviated from the setting, and avoids the welding wire fixing device, which can ensure that the wind body moves away from the cooling cover as soon as possible to ensure the cooling efficiency of the cooling cover. In summary, the wire welding machine can effectively solve the problem of easy occurrence of product oxidation during welding of the wire welding machine.

[0010] In some technical solutions, along a first direction, the product fixing device, the transducer and the welding wire fixing device are arranged in sequence; the angle between the air outlet direction of the cooling air outlet and the first direction is between 30 degrees and 60 degrees.

[0011] In some technical solutions, the cooling cover includes a cooling portion and a mounting portion located at a rear end of the cooling portion, and the transducer extends out at a front end of the cooling portion to arrange a welding needle.

[0012] In some technical solutions, the cooling part is provided with the cooling air passage from the front end to the rear end; the cooling air outlets are arranged in sequence along the front-to-back direction and are generally arranged forward.

[0013] In some technical solutions, the transducer is fixed by two locking screws on both the front and rear sides of the mounting portion.

[0014] In some technical schemes, one of the left and right sides of the cooling hood is provided with the cooling air outlet, and the other is provided with the cooling air inlet of the cooling air channel; wherein the left and right directions, the parallel directions of the welding wire fixing device and the product fixing device, and the extension direction of the transducer are arranged perpendicular to each other.

[0015] In some technical solutions, the cooling air inlet is arranged rearward relative to the cooling air outlet; the cooling air inlet is inclined forward.

[0016] In some technical solutions, the cooling part of the cooling cover is closed from front to back.

[0017] In some technical solutions, the cooling hood is a metal part, and the surface of the cooling hood is an anodized surface.

[0018] In some technical solutions, the cooling cover is rod-shaped from front to back; the product fixing device is a pressure plate, and the welding wire fixing device is a wire clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A forward schematic diagram of a cooling hood provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the top view of the cooling cover provided in an embodiment of the utility model;

[0022] Figure 3 A rearward schematic diagram of a cooling hood provided in an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the structural layout of a wire bonding machine provided in an embodiment of the utility model.

[0024] The following are marked in the accompanying drawings:

[0025] Cooling part 1, mounting part 2, cooling air channel 3, cooling air inlet 4, cooling air outlet 5, locking screw 6, product fixing device 7, welding wire fixing device 8, through hole 9.

[0026] in Figure 4 The double-dotted line in the middle indicates the air outlet path of the cooling air outlet, and the arrow indicates the air outlet direction. DETAILED DESCRIPTION

[0027] The embodiment of the utility model discloses a wire bonding machine, which can effectively solve the problem that product oxidation is easy to occur during welding by the wire bonding machine.

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-Figure 4 , Figure 1 A forward schematic diagram of a cooling hood provided in an embodiment of the utility model; Figure 2 A schematic diagram of the top view of the cooling cover provided in an embodiment of the utility model; Figure 3 A rearward schematic diagram of a cooling hood provided in an embodiment of the utility model; Figure 4 A schematic diagram of the structural layout of a wire bonding machine provided in an embodiment of the utility model.

[0030] In some embodiments, the present embodiment provides a wire bonding machine. Specifically, the wire bonding machine mainly includes a wire bonding fixing device, a transducer, a product fixing device and a cooling hood. The wire bonding fixing device is used to fix the welding wire, which is generally a wire clamp, and of course it can also be other fixing devices, such as an adhesion device, a magnetic suction device, etc. The product fixing device is used to fix the product to be welded, and the product fixing device is generally a pressure plate, and of course it can also be a pressure block, a negative pressure adsorption device, etc. In practical applications, an inert gas blowing device can be integrated on the wire bonding machine, or the above-mentioned inert gas blowing device can be separately provided to form an inert gas protective film at the product to be welded.

[0031] The transducer is located between the welding wire fixture and the product fixture, and a welding needle is provided at the front end of the transducer for welding the welding wire fixed by the welding wire fixture to the product to be welded fixed by the product fixture. For details on how to ensure the completion of the welding, as well as the specific positional relationship between the transducer, the welding wire fixture and the product fixture, please refer to the prior art.

[0032] A cooling hood is provided at the transducer to cool the transducer. The corresponding cooling hood is also located between the product fixture and the welding wire fixture. The cooling hood generally fully surrounds the transducer. Of course, in some cases, it can also be a semi-enclosed setting. The fully enclosed setting is, for example, a plug hole is formed on the cooling hood, and the transducer is inserted into the cooling hood.

[0033] The cooling cover is provided with a cooling air channel 3, which has a cooling air inlet 4 and a cooling air outlet 5. The cooling air enters the cooling air channel 3 from the cooling air inlet 4, and absorbs heat from the cooling cover by flowing in the cooling air channel 3. The corresponding cooling cover absorbs heat from the transducer to achieve heat dissipation of the transducer. After absorbing the heat, the wind body is blown out from the cooling air outlet 5, discharged through the wind body, and then takes the heat out. In order to better dissipate heat, the cooling air channel 3 can be arranged around the transducer. Of course, the arrangement of the cooling air channel 3 can also refer to the prior art.

[0034] The cooling air outlet 5 of the cooling air channel 3 can be located on one lateral side of the cooling cover, and the lateral direction is perpendicular to the parallel direction between the product fixture and the welding wire fixture, and is perpendicular to the extension direction of the transducer. In practical applications, the lateral direction is generally the left-right direction, and the extension direction of the transducer is the front-back direction. The product fixture and the welding wire fixture are arranged up and down, and the welding wire fixture, the transducer and the product fixture are arranged in sequence from top to bottom.

[0035] And further, if Figure 4 As shown, the air outlet direction of the cooling air outlet 5 is set to deviate from the product fixing device, that is, it is tilted in the direction away from the product fixing device, so that the air body blown out from the cooling air outlet 5 becomes farther and farther away from the product fixing device as it flows, mainly in the parallel direction between the product fixing device and the welding wire fixing device, thereby achieving a deviated setting.

[0036] like Figure 4 As shown, the air outlet path of the cooling air outlet 5 avoids the welding wire fixture to avoid blowing toward the welding wire fixture, thereby avoiding interference from the welding wire fixture and causing the wind direction to change. Generally speaking, the wind from the cooling air outlet 5 is divergent, so the deviation angle of the cooling air outlet 5 needs to be determined according to the distance from the edge of the welding wire fixture, the wind speed, etc. Generally speaking, as long as 80% of the blown air avoids the welding wire fixture, it can be considered that the air outlet path of the cooling air outlet 5 avoids the welding wire fixture.

[0037] In the above-mentioned wire welding machine, when in use, the cooling air enters the cooling air duct through the cooling air inlet 4, absorbs heat in the cooling air duct, and then blows out from the cooling air outlet 5. Under the action of inertia, it moves along the direction of the cooling air outlet 5. During the movement, the distance between the cooling air outlet 5 and the product fixing device becomes farther and farther, and the influence on the air film at the product fixing device is reduced. And by avoiding the welding wire fixing device, it can be ensured that the wind body quickly moves away from the cooling cover. In the above-mentioned wire welding machine, by setting the air outlet direction of the cooling air outlet 5 of the cooling air channel 3 to deviate from the product fixing device, the influence on the air film at the product fixing device can be effectively reduced, thereby effectively avoiding the easy occurrence of product oxidation during welding of the wire welding machine. At the same time, it is not completely deviated from the setting, and avoids the welding wire fixing device, which can ensure that the wind body moves away from the cooling cover as soon as possible to ensure the cooling efficiency of the cooling cover. In summary, the wire welding machine can effectively solve the problem of easy product oxidation during welding of the wire welding machine.

[0038] In some embodiments, for the convenience of explanation, the parallel direction of the product fixture, the transducer and the welding wire fixture is taken as the first direction, that is, the product fixture, the transducer and the welding wire fixture are arranged in sequence along the first direction. Generally speaking, the first direction is the up and down direction.

[0039] Correspondingly, the outlet direction of the cooling air outlet 5 can be set at an angle of 30 to 60 degrees relative to the first direction. It can be considered that the outlet direction of the cooling air outlet 5 and the plane perpendicular to the first direction have an angle of 30 to 60 degrees. If the first direction is the up-down direction and the product fixture is located below the welding wire fixture, the outlet direction of the cooling air outlet 5 can be tilted upward by 30 to 60 degrees. Preferably, the outlet direction of the cooling air outlet 5 has an angle of about 45 degrees relative to the first direction.

[0040] In some embodiments, the general cooling cover mainly includes a cooling part 1 and a mounting part 2 located at the rear end of the cooling part 1, and the transducer extends at the front end of the cooling part 1 to arrange the welding needle. The mounting part 2 is fixed to the transducer. Generally, a body is also provided, wherein the cooling cover, the welding wire fixing device and the product fixing device are all fixed on the body. The connection between the cooling cover and the body is generally achieved by connecting the body to the ear plates or protrusions on both sides of the mounting part 2, generally by screw connection or bolt connection.

[0041] In some embodiments, the cooling part 1 is provided with cooling air channels from the front end to the rear end, so that the cooling air channels have a larger distribution area, so as to have a better cooling effect. Generally speaking, a plurality of cooling air outlets 5 are provided to discharge air as quickly as possible. The cooling air outlets 5 are preferably arranged in sequence along the front-to-back direction. And it is preferably arranged forward as a whole, because the span of the welding wire fixing device gradually increases from front to back in the left-right direction, and all cooling air outlets 5 are arranged forward as a whole, so as to avoid the welding wire fixing device as much as possible in the front-to-back direction.

[0042] In some embodiments, in order to better install the transducer on the mounting portion 2, the mounting portion 2 and the transducer are connected by locking screws 6. Further, the transducer can be fixed by two locking screws 6 on both the front and rear sides of the mounting portion 2, and the four locking screws 6 are distributed in a rectangular shape.

[0043] In some embodiments, in order to better distribute the cooling air inlet, it is preferred that the cooling air inlet and the cooling air outlet are respectively arranged on both sides of the cooling cover, mainly on the left and right sides. That is, one of the left and right sides of the cooling cover is provided with a cooling air inlet, and the other is provided with a cooling air inlet of the cooling air channel 3; wherein the left and right directions, the parallel directions of the welding wire fixture and the product fixture, and the extension direction of the transducer are arranged perpendicular to each other. In practical applications, the parallel directions of the welding wire fixture and the product fixture are generally in the up-down direction, and the extension direction of the transducer is generally in the front-back direction, as described above.

[0044] In some embodiments, the cooling air inlet is tilted forward to facilitate docking between the cooling air inlet and the cooling air supply device, so as to facilitate docking. At the same time, the cooling air inlet can also be arranged relatively backward relative to the cooling air outlet to better reduce interference with installation.

[0045] In some embodiments, it is preferred that the cooling portion 1 of the cooling cover is closed from front to back without opening a window. The closed setting here refers to a circumferential closed setting, such as a through hole with a closed hole wall on all sides, and the transducer is inserted into the through hole. And the closed position is at least from the front end to the rear end, so as to ensure the closed length. Through the closed setting, it can be better ensured that the heat around the transducer is evenly distributed, and it can effectively avoid a large deviation in the position of the solder ball when welding again after stopping or stopping.

[0046] In some embodiments, the cooling cover is a metal part, and the surface of the cooling cover is an anodized surface. The use of metal parts can effectively avoid problems such as high temperature aging of the cooling cover, thereby avoiding large structural deformation. The surface of the cooling cover is an anodized surface, which can make the cooling cover have a good cooling effect.

[0047] In some embodiments, the cooling shroud may be rod-shaped from front to back so that the rear end does not need to dissipate heat through an airfoil structure, thereby reducing deformation and reducing interference caused by the transducer to the product fixture.

[0048] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wire bonding machine, comprising a wire bonding fixture, a transducer and a product fixture for fixing a product to be bonded, wherein a cooling hood is provided at the transducer, the cooling hood is located between the product fixture and the wire bonding fixture, and the cooling hood is provided with a cooling air channel, characterized in that: The cooling air outlet of the cooling air channel is located on one lateral side of the cooling cover, and the air outlet direction is set to deviate from the direction of the product fixing device, and the air outlet path avoids the welding wire fixing device.

2. The wire bonding machine according to claim 1, characterized in that: Along the first direction, the product fixing device, the transducer and the welding wire fixing device are arranged in sequence; the angle between the air outlet direction of the cooling air outlet and the first direction is between 30 degrees and 60 degrees.

3. The wire bonding machine according to claim 1, characterized in that: The cooling cover includes a cooling portion and a mounting portion located at a rear end of the cooling portion, and the transducer extends out at a front end of the cooling portion to arrange a welding pin.

4. The wire bonding machine according to claim 3, characterized in that: The cooling part is provided with the cooling air passage from the front end to the rear end; the cooling air outlets are arranged in sequence along the front-to-back direction and are arranged forward as a whole.

5. The wire bonding machine according to claim 4, characterized in that: The transducer is fixed by two locking screws on both the front and rear sides of the mounting portion.

6. The wire bonding machine according to claim 1, characterized in that: One of the left and right sides of the cooling cover is provided with the cooling air outlet, and the other is provided with the cooling air inlet of the cooling air channel; wherein the left and right directions, the parallel directions of the welding wire fixing device and the product fixing device, and the extension direction of the transducer are arranged perpendicular to each other.

7. The wire bonding machine according to claim 6, characterized in that: The cooling air inlet is arranged rearwardly relative to the cooling air outlet; the cooling air inlet is inclined forwardly.

8. The wire bonding machine according to any one of claims 1 to 7, characterized in that: The cooling part of the cooling cover is closed from front to back.

9. The wire bonding machine according to claim 8, characterized in that: The cooling cover is a metal part, and the surface of the cooling cover is an anodized surface.

10. The wire bonding machine according to claim 8, characterized in that: The cooling cover is rod-shaped from front to back; the product fixing device is a pressing plate, and the welding wire fixing device is a wire clamp.

Images