A welding head assembly for an ultrasonic aluminum wire pressure welding machine

Abstract

The application discloses a welding head assembly of an ultrasonic aluminum wire pressure welding machine, which comprises a mounting bracket, a cleaver and a transducer arranged on the mounting bracket, the transducer being connected with the cleaver, and further comprises a clamping-off assembly, a retreat bracket and a retreat driving assembly connected in sequence, the clamping-off assembly being used for clamping off a welding wire and clamping the clamped-off welding wire, the retreat bracket being slidably connected with the mounting bracket, and the retreat driving assembly being used for driving the retreat bracket to slide; the clamping-off assembly is arranged to clamp off the welding wire and clamp the clamped-off welding wire, so that the risk of the clamped-off welding wire being pulled after being broken is reduced; and the retreat driving assembly is arranged to drive the retreat bracket to slide, so that the clamped-off welding wire can retreat after being clamped by the clamping-off assembly, the risk of the clamped-off welding wire being adhered to a welded product is reduced, and the production yield is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ultrasonic welding equipment, in particular to a welding head assembly of an ultrasonic aluminum wire pressure welding machine. BACKGROUND

[0002] In the production process of semiconductor devices, an ultrasonic pressure welding machine is generally used to weld a metal wire to a chip. Ultrasonic waves from an ultrasonic generator are transmitted to a cleaver through a transducer to generate high-frequency vibration. When the cleaver contacts a lead wire and a workpiece to be welded, under the action of pressure and vibration, the surfaces of the metals to be welded are rubbed against each other, the oxide film is destroyed, and plastic deformation occurs, so that the two pure metal surfaces are in close contact, reaching the atomic distance bonding, and finally forming a firm mechanical connection.

[0003] The welding head of the existing ultrasonic aluminum wire pressure welding machine generally includes a cleaver, a transducer, and a wire cutting mechanism. The transducer is connected to the cleaver to provide vibration for the cleaver during welding. The pressure of the cleaver during welding is provided by a pressure mechanism. At the end of each welding, the aluminum wire is cut off by the wire cutting mechanism. However, during the cutting process of the aluminum wire, the aluminum wire will be subjected to a pulling force, which can easily cause the position of the welding wire to deviate. When the position of the welding wire deviates, the operation of the equipment needs to be stopped for adjustment, which seriously affects the production yield. SUMMARY

[0004] The main purpose of the present application is to provide a welding head assembly of an ultrasonic aluminum wire pressure welding machine with high production yield.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a welding head assembly of an ultrasonic aluminum wire pressure welding machine, comprising a mounting bracket, a cleaver and a transducer arranged on the mounting bracket, the transducer being connected to the cleaver, further comprising a clamping and cutting assembly, a retreat bracket and a retreat driving assembly connected in sequence, the clamping and cutting assembly being used for clamping and cutting the welding wire and clamping the clamped welding wire, the retreat bracket being slidably connected to the mounting bracket, and the retreat driving assembly being used for driving the retreat bracket to slide.

[0006] The welding head assembly of the ultrasonic aluminum wire pressure welding machine provided by the present application has the characteristics of high production yield. The clamping and cutting assembly is arranged to clamp and cut the welding wire and clamp the clamped welding wire, reducing the risk of the clamped welding wire being subjected to a pulling force. The retreat driving assembly is arranged to drive the retreat bracket to slide, so that the clamping and cutting assembly can retreat after clamping the clamped welding wire, reducing the risk of the clamped welding wire adhering to the welded product and improving the production yield. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and are not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0008] Figure 1 Structure diagram of the welding head assembly of the ultrasonic aluminum wire pressure welding machine of the first embodiment of the present application;

[0009] Figure 2 Structure diagram of the welding head assembly of the ultrasonic aluminum wire pressure welding machine of the first embodiment of the present application (hidden behind the lighting assembly);

[0010] Figure 3 Structure diagram of the welding head assembly of the ultrasonic aluminum wire pressure welding machine of the first embodiment of the present application (hidden behind the lighting assembly);

[0011] Figure 4 Structure diagram of the welding head assembly of the ultrasonic aluminum wire pressure welding machine of the first embodiment of the present application (hidden behind the lighting assembly and the mounting bracket).

[0012] Label explanation:

[0013] 1, mounting bracket; 11, rear sliding rail; 2, clamping assembly; 21, first clamping arm; 211, limiting rod; 212, limiting block; 22, clamping driving piece; 23, second clamping arm; 3, rear bracket; 31, rear sliding block; 32, wire guide ceramic nozzle; 4, rear motor; 5, transducer; 51, chopper; 52, buffer bracket; 53, rotating bearing; 54, trigger sensor; 55, reset spring; 6, lighting assembly; 7, wire feeding assembly. DETAILED DESCRIPTION

[0014] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0015] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0016] It should be noted that if the embodiments of the present application involve directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional relationship, motion condition, etc. between components in a certain specific posture as shown in the drawings, and if the specific posture changes, the directional indications will also change accordingly.

[0017] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features.

[0018] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, for example, "and / or" includes the scheme, or the scheme, or the scheme that satisfies both. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0019] In this application, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0020] Please refer to Figures 1 to 4 A welding head assembly of an ultrasonic aluminum wire pressure welding machine, comprising a mounting bracket 1, a cleaver 51 and a transducer 5 arranged on the mounting bracket 1, the transducer 5 is connected with the cleaver 51, further comprising a clamping assembly 2, a retreat bracket 3 and a retreat driving assembly connected in sequence, the clamping assembly 2 is used for clamping and holding the clamped welding wire, the retreat bracket 3 is slidably connected with the mounting bracket 1, and the retreat driving assembly is used for driving the retreat bracket 3 to slide.

[0021] From the above description, the beneficial effects of the present application are that the clamping assembly 2 is arranged to clamp and hold the clamped welding wire, reducing the risk of the welding wire being pulled after breaking; and the retreat driving assembly is arranged to drive the retreat support 3 to slide, so that the clamping assembly 2 can retreat after clamping the clamped welding wire, reducing the risk of the clamped welding wire being adhered to the welded product, and improving the production yield.

[0022] In an embodiment, the clamping assembly 2 comprises a first clamping arm 21, a second clamping arm 23 and a clamping driving member 22; the first clamping arm 21 is installed on the retreat support 3, the clamping driving member 22 is installed on the first clamping arm 21, the output shaft of the clamping driving member 22 is connected with the second clamping arm 23, and the first clamping arm 21 and the second clamping arm 23 form a clamping gap for the welding wire to pass through, and the clamping driving member 22 is used to drive the second clamping arm 23 to control the size of the clamping gap.

[0023] From the above description, the clamping assembly 2 has a simple structure and is easy to install.

[0024] In an embodiment, the first clamping arm 21 is further provided with a limiting rod 211, and the limiting rod 211 is provided with a limiting block 212 abutting against one side of the second clamping arm 23 away from the first clamping arm 21.

[0025] From the above description, the limiting block 212 can limit the second clamping arm 23, ensuring the accuracy of the position between the first clamping arm 21 and the second clamping arm 23.

[0026] In an embodiment, the limiting block 212 is threadedly connected with the limiting rod 211.

[0027] From the above description, the limiting block 212 is threadedly connected with the limiting rod 211, which facilitates the adjustment of the position of the limiting block 212 on the limiting rod 211, thereby adjusting the maximum value of the clamping gap.

[0028] In an embodiment, the retreat support 3 is further provided with a wire guide porcelain nozzle 32, one end of the wire guide porcelain nozzle 32 is provided with a wire inlet for introducing the welding wire, the other end of the wire guide porcelain nozzle 32 is provided with a wire outlet in communication with the wire inlet, and the wire outlet is arranged opposite to the clamping gap.

[0029] From the above description, the wire guide porcelain nozzle 32 facilitates the guidance of the welding wire, ensuring that the welding wire can be accurately delivered to the clamping gap.

[0030] In an embodiment, the mounting bracket 1 is provided with a retreat sliding rail 11, and the retreat bracket 3 is provided with a retreat sliding block 31 which is slidably connected with the retreat sliding rail 11.

[0031] As described above, the retreat sliding rail 11 and the retreat sliding block 31 which is matched with the retreat sliding rail 11 are provided, so as to facilitate the retreat action of the retreat bracket 3 and ensure the stability of the moving track of the retreat bracket 3.

[0032] In an embodiment, the mounting bracket 1 is further provided with a buffer bracket 52 which is rotatably mounted on the mounting bracket 1, and the transducer 5 is mounted on the buffer bracket 52, when the wedge 51 is pressed to the welded product, the buffer bracket 52 rotates and makes the position of the wedge 51 to be lifted up.

[0033] As described above, the buffer bracket 52 facilitates the buffering of the pressure of the wedge 51 on the welded product, so as to reduce the risk of damage to the welded product in the welding process.

[0034] In an embodiment, the mounting bracket 1 is further provided with a trigger sensor 54 which is arranged opposite to the buffer bracket 52.

[0035] As described above, the trigger sensor 54 can sense the rotating position of the buffer bracket 52.

[0036] In an embodiment, the mounting bracket 1 is further provided with a reset spring 55 which is connected with the side of the buffer bracket 52 which is away from the trigger sensor 54.

[0037] As described above, the reset spring 55 facilitates the driving of the buffer bracket 52 to reset.

[0038] Embodiment one

[0039] Please refer to Figures 1 to 4The embodiment one of the present application is a welding head assembly of an ultrasonic aluminum wire pressure welding machine, which is applied to the ultrasonic aluminum wire pressure welding machine and is specifically used for welding aluminum wire to metal terminal products. The welding head assembly of the ultrasonic aluminum wire pressure welding machine comprises a mounting bracket 1, a cleaver 51 and a transducer 5 arranged on the mounting bracket 1, the transducer 5 is connected with the cleaver 51, further comprises a clamping-off assembly 2, a retreat bracket 3 and a retreat driving assembly connected in sequence, the clamping-off assembly 2 is used for clamping off the welding wire and clamping the clamped-off welding wire, the retreat bracket 3 is slidably connected with the mounting bracket 1, and the retreat driving assembly is used for driving the retreat bracket 3 to slide. The clamping-off assembly 2 is arranged to clamp off the welding wire and clamp the clamped-off welding wire, so that the risk of the clamped-off welding wire being pulled after being broken is reduced. The retreat driving assembly is arranged to drive the retreat bracket 3 to slide, so that the clamping-off assembly 2 can retreat after clamping the clamped-off welding wire, the risk of the clamped-off welding wire being adhered to the welded product is reduced, and the production yield is improved.

[0040] Specifically, please combine Figure 3 The clamping-off assembly 2 comprises a first clamping-off arm 21, a second clamping-off arm 23 and a clamping-off driving member 22. The first clamping-off arm 21 is installed on the retreat bracket 3, the clamping-off driving member 22 is installed on the first clamping-off arm 21, the clamping-off driving member 22 is a clamping-off motor, the output shaft of the clamping-off motor is fixedly connected with the second clamping-off arm 23, the first clamping-off arm 21 and the second clamping-off arm 23 form a clamping-off gap for the welding wire to pass through, and the clamping-off driving member 22 is used for driving the second clamping-off arm 23 to control the size of the clamping-off gap. Specifically, the first clamping-off arm 21 and the second clamping-off arm 23 are respectively provided with knife edges for clamping off the welding wire, and the knife edges are located in the clamping-off gap. When the welding wire needs to be clamped off, the clamping-off motor drives the second clamping-off arm 23 to move towards the side close to the first clamping-off arm 21, so that the clamping-off gap becomes smaller, and the welding wire is clamped off.

[0041] Preferably, the first pinch arm 21 is further provided with a limiting rod 211, the limiting rod 211 is provided with a limiting block 212 which is in contact with the side of the second pinch arm 23 which is away from the first pinch arm 21, and the limiting rod 211 is penetrating through the second pinch arm 23; the limiting block 212 can limit the second pinch arm 23, so as to ensure the accuracy of the position between the first pinch arm 21 and the second pinch arm 23; specifically, the limiting block 212 is threadedly connected with the limiting rod 211, so as to adjust the position of the limiting block 212 on the limiting rod 211, thereby adjusting the maximum value of the pinch gap; in detail, the retreat support 3 is further provided with a wire guide porcelain nozzle 32, one end of the wire guide porcelain nozzle 32 is provided with a wire inlet for introducing the welding wire, the other end of the wire guide porcelain nozzle 32 is provided with a wire outlet which is in communication with the wire inlet, and the wire outlet is opposite to the pinch gap; the wire guide porcelain nozzle 32 can guide the welding wire, so as to ensure that the welding wire can be accurately delivered to the pinch gap.

[0042] Please combine Figure 4 In the embodiment, the retreat driving assembly comprises a retreat motor 4 and a driving block, the driving block is installed on the output shaft of the retreat motor 4 and is rotatably connected with the retreat support 3, and the retreat support 3 is driven to do reciprocating motion by the retreat motor 4; specifically, the mounting support 1 (not shown in the figure) is provided with a retreat sliding rail 11, and the retreat support 3 is provided with a retreat sliding block 31 which is slidably connected with the retreat sliding rail 11; the retreat sliding rail 11 and the retreat sliding block 31 which cooperates with the retreat sliding rail 11 are arranged, so as to facilitate the retreat action of the retreat support 3 and ensure the stability of the moving track of the retreat support 3.

[0043] Preferably, please combine Figure 1 and Figure 2, the welding head assembly of the ultrasonic aluminum wire pressure welding machine further comprises a buffer support 52 rotatably installed on the mounting support 1, the transducer 5 is installed on the buffer support 52, when the chopper knife 51 is pressed to the welded product, the buffer support 52 rotates and makes the position of the chopper knife 51 lift up, the buffer support 52 facilitates buffering the pressure of the chopper knife 51 on the welded product, reduces the risk of damage to the welded product in the welding process, and specifically, the mounting support 1 is further provided with a rotating bearing 53, and the buffer support 52 is installed on the rotating bearing 53, in detail, the mounting support 1 is further provided with a trigger sensor 54, the trigger sensor 54 is arranged opposite to the buffer support 52, and the trigger sensor 54 can sense the rotating position of the buffer support 52, and more specifically, the mounting support 1 is further provided with a reset spring 55, the reset spring 55 is connected to the side of the buffer support 52 away from the trigger sensor 54, and the reset spring 55 facilitates driving the buffer support 52 to reset.

[0044] In the embodiment, the mounting support 1 is further provided with a lighting assembly 6 and a wire feeding assembly 7, the lighting assembly 6 is located obliquely above the chopper knife 51, and is used for illuminating the welding position of the chopper knife 51, and the wire feeding assembly 7 is used for conveying the welding wire to the wire inlet of the wire guide ceramic nozzle 32.

[0045] In summary, the welding head assembly of the ultrasonic aluminum wire pressure welding machine has the characteristics of high production yield, the clamping assembly is arranged to clamp and hold the clamped welding wire, the risk of the clamped welding wire being pulled after being broken is reduced, and the retreat driving assembly is arranged to drive the retreat support to slide, so that the clamping assembly can retreat after clamping and holding the clamped welding wire, the risk of the clamped welding wire being adhered to the welded product is reduced, and the production yield is improved.

[0046] The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields within the concept of the present application is included in the patent protection scope of the present application.

Claims

1. An ultrasonic aluminum wire bonding head assembly comprising: The installation support, the wedge and the transducer connected with the wedge, the clamping assembly, the retreat support and the retreat driving assembly connected in sequence, the clamping assembly for clamping and holding the welding wire, the retreat support slidably connected with the installation support, the retreat driving assembly for driving the retreat support to slide, the clamping assembly including the first clamping arm, the second clamping arm and the clamping driving member, the first clamping arm installed on the retreat support, the clamping driving member installed on the first clamping arm, the output shaft of the clamping driving member connected with the second clamping arm, the first clamping arm and the second clamping arm forming a clamping gap for the welding wire to pass through, the clamping driving member for driving the second clamping arm to control the size of the clamping gap, the retreat support further provided with the wire guide ceramic nozzle, one end of the wire guide ceramic nozzle provided with a wire inlet for the welding wire to be introduced, the other end of the wire guide ceramic nozzle provided with a wire outlet in communication with the wire inlet, the wire outlet arranged opposite to the clamping gap, the retreat driving assembly including the retreat motor and the driving block, the driving block installed on the output shaft of the retreat motor and rotatably connected with the retreat support, the retreat support driven by the retreat motor to make reciprocating motion.

2. The horn assembly of an ultrasonic aluminum wire press-bonding machine according to claim 1, wherein The first clamping arm is further provided with the limiting rod, the limiting rod provided with the limiting block abutting against the side of the second clamping arm away from the first clamping arm.

3. The horn assembly of an ultrasonic aluminum wire press-bonding machine according to claim 2, wherein The limiting block is threadedly connected with the limiting rod.

4. The horn assembly for an ultrasonic aluminum wire press-bonding machine according to claim 1, wherein The installation support is provided with the retreat sliding rail, the retreat support provided with the retreat sliding block slidably connected with the retreat sliding rail.

5. The horn assembly for an ultrasonic aluminum wire press-bonding machine according to claim 1, wherein The installation support is further provided with the buffer support rotatably installed on the installation support, the transducer installed on the buffer support, the buffer support rotated and the wedge position lifted up when the wedge is lowered to the product to be welded.

6. The horn assembly of an ultrasonic aluminum wire press-bonding machine according to claim 5, wherein The installation support is further provided with the trigger sensor arranged opposite to the buffer support.

7. The horn assembly of an ultrasonic aluminum wire press-bonding machine according to claim 6, wherein The installation support is further provided with the reset spring connected with the side of the buffer support away from the trigger sensor.

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