Lead bonding machine suitable for extremely narrow frame

Abstract

The utility model discloses a lead bonding machine suitable for an extremely narrow frame, and relates to the technical field of semiconductor packaging. A feeding mechanism; a welding mechanism; preheating the plate; a cooling plate; the extremely narrow frame mechanism comprises two cover plates arranged on the preheating plate and the cooling plate respectively, a first limiting groove formed in the front track and a plurality of limiting columns arranged on the welding plate, and the two cover plates are matched with the preheating plate and the cooling plate to form second limiting grooves used for limiting one side of the lead frame. The first limiting grooves and the second limiting grooves are matched to limit the two sides of the lead frame, the multiple limiting columns are arranged in the length direction of the welding plate, and the limiting columns and the first limiting grooves are matched to limit the two sides of the lead frame. By adopting the technical scheme, through the arrangement of the ultra-narrow frame mechanism, the lead bonding machine can realize welding operation on the ultra-narrow lead frame, the welding requirement of the ultra-narrow lead frame is met, the practicability is high, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor packaging, in particular to a wire bonding machine suitable for an extremely narrow frame. Background Art

[0002] A wire bonder is a precision device used in the semiconductor packaging process to establish electrical connections between semiconductor chips and lead frames. Wire bonding is a critical packaging step that achieves electrical connections by connecting the pads on the chip to the corresponding pins of the lead frame using thin metal wires (usually gold, copper or aluminum wires).

[0003] The existing wire bonding machine includes a feeding track, a heating mechanism and a wire bonding mechanism. Before wire bonding, the chip and the lead frame need to be initially fixed, and then the lead frame with the semiconductor chip fixed thereon is transported to the heating mechanism through the feeding track. After the heating mechanism heats it, the wire bonding mechanism connects the solder joints on the chip with the corresponding pins of the lead frame, thereby realizing the electrical connection between the chip and the lead frame. In addition, the feeding track includes a front track and a rear track, and the front track and the rear track are connected by a wire rod, so that the width between the front track and the rear track can be adjusted through the wire rod, thereby realizing the transportation of lead frames of different widths.

[0004] However, the feed track on the existing wire bonding machine can only transport lead frames within a certain width range, resulting in the lead bonding machine being unable to weld lead frames of extremely narrow widths. Therefore, it is necessary to propose a wire bonding machine suitable for extremely narrow frames for welding lead frames of extremely narrow widths. Utility Model Content

[0005] The purpose of the utility model is to provide a wire bonding machine suitable for extremely narrow frames, in view of the phenomenon that the feeding track of the wire bonding machine in the prior art can only convey lead frames of a certain width, resulting in the wire bonding machine being unable to weld lead frames of extremely narrow width.

[0006] The technical solution adopted by the utility model is: a wire bonding machine suitable for extremely narrow frames, comprising:

[0007] The machine body has a feeding position and a discharging position at its left and right ends respectively, a welding position is also provided between the feeding position and the discharging position, and the feeding position, the discharging position and the welding position are all located on the same straight line;

[0008] The feeding mechanism is arranged between the feeding position and the discharging position, and is used to transport the lead frame at the feeding position to the welding position for welding and then to the discharging position, and includes a feeding track and a clamping conveying member, wherein the feeding position and the discharging position are respectively located at two ends of the feeding track, and the feeding track includes a front track and a rear track, and the clamping conveying member is used to transport the lead frame in the feeding track from the feeding position to the welding position and the discharging position in sequence along the length direction of the feeding track;

[0009] The welding mechanism comprises a welding plate arranged in the feeding track and an ultrasonic welding machine arranged on the machine body, wherein the welding plate is located at the welding position, and the welding head of the ultrasonic welding machine is located above the welding plate;

[0010] A preheating plate, arranged in the feeding track, connected to the feeding position and the welding position, and used for preheating the lead frame;

[0011] A cooling plate is arranged in the feeding track, connected to the welding position and the discharging position, and is used to cool the lead frame; and

[0012] The extremely narrow frame mechanism comprises two cover plates respectively arranged on the preheating plate and the cooling plate, a first limiting groove opened on the front track and a plurality of limiting columns arranged on the welding plate, the two cover plates are both located on the side of the preheating plate and the cooling plate away from the front track, and the two cover plates cooperate with the preheating plate and the cooling plate to form a second limiting groove for limiting one side of the lead frame, the first limiting groove cooperates with the second limiting groove to limit the two sides of the lead frame, the plurality of limiting columns are arranged along the length direction of the welding plate, and the limiting columns cooperate with the first limiting groove to limit the two sides of the lead frame.

[0013] Optionally, the preheating plate, cooling plate and cover plate are all detachable.

[0014] Optionally, the number of the clamping and conveying members is two, and the two clamping and conveying members are respectively and correspondingly arranged between the feeding position and the welding position and between the welding position and the discharging position.

[0015] Optionally, a pressure plate is fixedly installed above the welding plate, and the pressure plate cooperates with the welding plate to form a gap for the lead frame to pass through, and a welding window is opened on the pressure plate so that the welding head of the ultrasonic welding machine can weld the lead frame within the welding window.

[0016] Optionally, a first fixed seat and a second fixed seat are provided on the machine body, and the first fixed seat and the second fixed seat are respectively arranged between the feeding position and the welding position and between the welding position and the discharging position, and the first fixed seat and the second fixed seat are respectively provided with a first clamp and a second clamp, and the first clamp and the second clamp are both located above the feeding track, and the first clamp and the second clamp are respectively clamped and fixed on both sides of the pressure plate.

[0017] Optionally, a blowing mechanism is further provided on the first fixing seat, and the blowing mechanism is used to blow away the hot air in the welding window, and the blowing mechanism includes:

[0018] The air blowing cylinder is arranged between the feeding position and the welding position and is located above the feeding track;

[0019] The blowing hole is obliquely arranged on the bottom side of the blowing cylinder and faces the welding window so as to blow air into the welding window.

[0020] Optionally, a heating plate is further provided on the machine body, and the heating plate is arranged below the welding plate. The heating plate is used to heat the lead frame transmitted to the welding plate so that the welding mechanism can perform welding.

[0021] Optionally, the welding mechanism also includes an XY motion platform arranged on the machine body and an image recognition camera arranged on the ultrasonic welding machine, the ultrasonic welding machine is fixedly arranged on the XY motion platform, and the image recognition camera is arranged at the welding head of the ultrasonic welding machine.

[0022] Optionally, a feeding mechanism is provided at the feeding position, and the feeding mechanism comprises:

[0023] A feeding bracket is fixed at the feeding position of the machine body;

[0024] A feed box is arranged on the feed bracket, and a plurality of lead frames to be welded are stacked in layers inside the box;

[0025] A feed clamping module, provided on the feed bracket, for clamping the front and rear sides of the feed box;

[0026] A pushing module, provided on the feeding bracket, for pushing the lead frame in the feeding box into the feeding track;

[0027] A feed lifting module, disposed on the feed support, for driving the feed box to vertically lift relative to the feed support; and

[0028] A feed tray is used to store the feed box.

[0029] Optionally, a discharging mechanism is provided at the discharging position, and the discharging mechanism comprises:

[0030] The discharging bracket is fixed at the discharging position of the machine body;

[0031] A discharging box is arranged on the discharging bracket;

[0032] A discharge clamping module, provided on the discharge bracket, for clamping the front and rear sides of the discharge box;

[0033] A discharge lifting module, provided on the feed support, for driving the feed box to vertically lift relative to the feed support, so that the lead frames in the conveying track are sequentially stacked in the discharge box; and

[0034] The discharging tray is used for storing the feeding box.

[0035] After adopting the above technical solution, the beneficial effects of the utility model are:

[0036] 1. When welding a lead frame with an extremely narrow width, the present application limits the lead frame through an extremely narrow frame mechanism, that is, the second limiting groove formed by the cover plate and the preheating plate and the first limiting groove on the front track are used to limit the two sides of the lead frame, so that the clamping conveyor can smoothly convey the lead frame from the feed end to the pad on the welding position, and the two sides of the lead frame are limited by the cooperation of multiple limiting columns on the pad and the first limiting groove on the front track, so as to achieve the limit fixation of the lead frame on the pad, so that the ultrasonic welding machine can be used in The lead frame is not easy to shift when welding the lead frame. After welding is completed, the lead frame with completed welding is transported to the cooling plate by the clamping conveyor. At this time, the first limiting groove on the front track cooperates with the cover plate and the cooling plate to form a second limiting groove to limit the two sides of the lead frame, so that the clamping conveyor can stably transport the lead frame from the welding position to the discharge position, thereby realizing automatic feeding, welding and automatic discharge of the lead frame, avoiding the situation that the existing lead bonding machine cannot weld the lead frame with extremely narrow width;

[0037] 2. The cooling plate, preheating plate and cover plate in this application are all detachable, so when welding extremely narrow frames of different widths, it is only necessary to replace the cooling plate, preheating plate and cover plate of corresponding specifications and sizes. The operation is simple and convenient, the application range is wide, the practicality is strong, and it has a good market promotion prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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 labor.

[0039] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0040] Figure 2 yes Figure 1 A front view of

[0041] Figure 3It is a schematic diagram used to reflect the coordination relationship between the welding mechanism, feeding mechanism, preheating plate and cooling plate;

[0042] Figure 4 It is a partial display diagram of the welding mechanism;

[0043] Figure 5 This is a display diagram of the present embodiment without the machine body and welding mechanism;

[0044] Figure 6 yes Figure 5 Partial display diagram of

[0045] Figure 7 It is a schematic diagram used to reflect the positional relationship between the feeding mechanism, preheating plate, cooling plate and welding plate;

[0046] Figure 8 yes Figure 7 Another perspective of the display diagram;

[0047] Fig. 9 is a display diagram of the feeding mechanism in this embodiment;

[0048] Fig.10 It is a display diagram of the discharging mechanism in this embodiment.

[0049] Explanation of reference numerals: 10, machine body; 11, feeding position; 12, discharging position; 13, welding position; 14, heating plate; 15, pressing plate; 151, welding window; 16, first fixing seat; 161, first clamp; 17, second fixing seat; 171, second clamp; 20, feeding mechanism; 21, feeding track; 211, front track; 212, rear track; 22, clamping conveyor; 30, welding mechanism; 31, welding plate; 32, ultrasonic welding machine; 33, XY motion platform ;40. Preheating plate;50. Cooling plate;61. Cover plate;62. First limiting groove;63. Limiting column;64. Second limiting groove;70. Blowing mechanism;80. Feeding mechanism;81. Feeding bracket;82. Feeding box;83. Feeding clamping module;84. Pushing module;85. Feeding lifting module;86. Feeding tray;90. Discharging mechanism;91. Discharging bracket;92. Discharging box;93. Discharging clamping module;94. Discharging lifting module;95. Discharging tray. DETAILED DESCRIPTION

[0050] The following will be combined with the attached embodiment of the utility model Figure 1-10 , 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 them. Based on the embodiments of 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.

[0051] It should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "back", "side", "circumferential" and the like in the present invention indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. In addition, the words "first", "second" and the like are only used to distinguish multiple components or structures with the same or similar structures, and do not represent any special limitation on the setting order or connection relationship.

[0052] This embodiment relates to a wire bonding machine suitable for an extremely narrow frame, referring to Figure 1 and Figure 2 , including a body 10, a feeding mechanism 20, a welding mechanism 30, a preheating plate 40, a cooling plate 50 and an extremely narrow frame mechanism, wherein a feed position 11 and a discharge position 12 are respectively arranged at the left and right ends of the body 10, a welding position 13 is also arranged between the feed position 11 and the discharge position 12, and the feed position 11, the discharge position 12 and the welding position 13 are all located on the same straight line.

[0053] Reference Figure 2 , Figure 5 and Figure 6 The feeding mechanism 20 is arranged between the feeding position 11 and the discharging position 12, and is used to transport the lead frame at the feeding position 11 to the welding position 13 for welding and then transport it to the discharging position 12. It includes a feeding track 21 and a clamping and conveying member 22. The feeding position 11 and the discharging position 12 are respectively located at the two ends of the feeding track 21. The feeding track 21 includes a front track 211 and a rear track 212. The front track 211 and the rear track 212 are arranged opposite to each other, and the front track 211 and the rear track 212 cooperate to limit the lead frame, so that the clamping and conveying member 22 can transport the lead frame located between the front track 211 and the rear track 212 from the feeding position 11 to the welding position 13 and the discharging position 12 in sequence along the length direction of the feeding track 21.

[0054] It should be noted that the front rail 211 can move towards or away from the rear rail 212 to achieve the limit of lead frames of different widths, and a screw transmission mechanism is provided between the front rail 211 and the rear rail 212, through which the front rail 211 is driven to move relative to the rear rail 212 to adjust the distance between the front rail 211 and the rear rail 212. This is a conventional technical means in the art and will not be described in detail here.

[0055] It should be noted that the spacing adjustment range between the front track 211 and the rear track 212 in the conventional wire bonding machine is 28 cm-85 cm, that is, the conventional wire bonding machine can only weld lead frames with a width between 28 cm and 85 cm.

[0056] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The welding mechanism 30 includes a welding plate 31 arranged in the feeding track 21 and an ultrasonic welding machine 32 arranged on the machine body 10. The welding plate 31 is located at the welding position 13, and the welding plate 31 is located in the feeding track 21. The welding head of the ultrasonic welding machine 32 is located above the welding plate 31, and the welding head of the ultrasonic welding machine 32 can be vertically lowered relative to the welding plate 31, so that when the lead frame is conveyed to the welding plate 31, the ultrasonic welding machine 32 can weld the lead frame on the welding plate 31.

[0057] The welding mechanism 30 also includes an XY motion platform 33 arranged on the body 10 and an image recognition camera arranged on the ultrasonic welding machine 32. The ultrasonic welding machine 32 is fixed on the XY motion platform 33 so that the ultrasonic welding machine 32 can move relative to the body 10 on the X-axis (the length direction of the body 10) and the Y-axis (the width direction of the body 10) through the XY motion platform 33. The image recognition camera is arranged at the welding head of the ultrasonic welding machine 32, and the image recognition camera is electrically connected to the ultrasonic welding machine 32 so that the chip position on the lead frame can be accurately identified by the image recognition camera, thereby improving the welding accuracy.

[0058] Reference Figure 1 , Figure 5 and Figure 6 The preheating plate 40 and the cooling plate 50 are both installed in the feeding track 21, wherein the preheating plate 40 is connected to the feeding position 11 and the welding position 13, and the preheating plate 40 is used to preheat the lead frame so that the ultrasonic welding machine 32 can quickly weld the lead frame to improve the welding efficiency and welding quality. The cooling plate 50 is connected to the welding position 13 and the discharging position 12, and the cooling plate 50 is used to cool the lead frame to avoid the situation where the temperature of the lead frame changes too quickly after welding and affects the welding quality.

[0059] Combination Figure 7 and Figure 8The extremely narrow frame mechanism includes two cover plates 61 respectively arranged on the preheating plate 40 and the cooling plate 50, a first limiting groove 62 opened on the front track 211, and a plurality of limiting columns 63 arranged on the welding plate 31, wherein the two cover plates 61 are respectively arranged along the length direction of the preheating plate 40 and the cooling plate 50, the two welding plates 31 are both located on the side of the preheating plate 40 and the cooling plate 50 away from the front track 211, and the two cover plates 61 cooperate with the preheating plate 40 and the cooling plate 50 to form a second limiting groove 64 for limiting one side of the lead frame, the first limiting groove 62 and the second limiting groove 64 on the front track 211 are arranged opposite to each other, and the first limiting groove 62 and the second limiting groove 64 cooperate to limit both sides of the lead frame, so that the lead frame can be limited when it is on the preheating plate 40 and the cooling plate 50. The plurality of limiting posts 63 are evenly distributed along the length direction of the welding plate 31 , and the plurality of limiting posts 63 cooperate with the first limiting grooves 62 to limit the two sides of the lead frame on the welding plate 31 .

[0060] It can be understood that, by setting the cover plate 61, the first limiting groove 62, and the plurality of limiting columns 63, the lead frame can be limited on the preheating plate 40, the welding plate 31, and the cooling plate 50. At this time, the lead frame can be transported from the preheating plate 40 at the feeding position 11 to the welding pad at the welding position 13 for welding by the clamping conveyor 22. After welding, the lead frame on the welding pad can be transported to the cooling plate 50 and then to the discharge position 12, so as to realize the transportation of the lead frame. At this time, since the spacing between the first limiting groove 62 and the second limiting groove 64 is smaller than the spacing between the front track 211 and the rear track 212, the lead frame with extremely narrow width can be transported at this time, thereby realizing the welding of the lead frame with extremely narrow width. It should be noted that, through the extremely narrow frame mechanism, the wire bonding machine provided in this embodiment can convey lead frames with a width of 14cm-28cm, that is, it can weld lead frames with a width of 14cm-28cm, thereby solving the problem that traditional wire bonding machines can only convey and weld lead frames with a width of 28cm-85cm.

[0061] Furthermore, the preheating plate 40, the cooling plate 50, and the cover plate 61 are all detachably arranged. In the present embodiment, the preheating plate 40, the cooling plate 50, and the cover plate 61 can be detachably connected by means of screw fastening or the like. In other embodiments, other methods such as snap-on fixing can also be adopted, which will not be elaborated here.

[0062] It can be understood that the preheating plate 40, the cooling plate 50 and the cover plate 61 are all detachable, so that when it is necessary to transport and weld extremely narrow frames of different widths, it is sufficient to replace the preheating plate 40, the cooling plate 50 and the cover plate 61 of corresponding sizes. In addition, when it is necessary to transport and weld lead frames of conventional widths, it is only necessary to remove the preheating plate 40, the cooling plate 50 and the cover plate 61. The preheating plate 40, the cooling plate 50 and the cover plate 61 can be replaced or directly removed according to the actual width of the lead frame to be welded. The operation is simple and convenient, the practicability is strong, and the application range is wide.

[0063] Further, refer to Figure 6 , Figure 7 and Figure 8 , there are two clamping and conveying members 22, and the two clamping and conveying members 22 are respectively arranged between the feeding position 11 and the welding position 13 and between the welding position 13 and the discharging position 12, and the two clamping and conveying members 22 can slide back and forth between the feeding position 11 and the welding position 13 and between the welding position 13 and the discharging position 12. In this embodiment, the clamping and conveying members 22 are manipulators slidably arranged on the body 10, and one of the clamping and conveying members 22 is used to realize the conveyance of the lead frame from the feeding position 11 to the welding position 13, and the other clamping and conveying member 22 is used to realize the conveyance of the lead frame at the welding position 13 to the discharging position 12.

[0064] Furthermore, a heating plate 14 is provided on the machine body 10 and is located below the welding plate 31 . The heating plate 14 is used to heat the welding plate 31 , thereby completing the heating of the lead frame transported to the welding plate 31 to facilitate welding by the welding mechanism 30 .

[0065] It can be understood that by heating the welding plate 31 through the heating plate 14, the temperature of the lead frame transported to the welding plate 31 increases, so that the welding mechanism 30 (ultrasonic welding machine 32) can stably weld the lead frame, thereby improving the welding quality.

[0066] Furthermore, a pressure plate 15 is fixedly installed above the welding plate 31, and the pressure plate 15 cooperates with the welding plate 31 to form a gap for the lead frame to pass through, and a welding window 151 is opened on the pressure plate 15 so that the welding head of the ultrasonic welding machine 32 can weld the lead frame in the welding window 151.

[0067] Through the above arrangement, when the lead frame passes through the gap formed by the pressure plate 15 and the welding plate 31, the chip to be welded on the lead frame is located in the welding window 151, which facilitates the ultrasonic welding machine 32 to weld it, thereby improving the welding accuracy and welding quality.

[0068] Furthermore, combined with Figure 5A first fixed seat 16 and a second fixed seat 17 are provided on the machine body 10. The first fixed seat 16 and the second fixed seat 17 are respectively arranged between the feeding position 11 and the welding position 13 and between the welding position 13 and the discharging position 12. The first fixed seat 16 and the second fixed seat 17 are respectively provided with a first clamp 161 and a second clamp 171. The first clamp 161 and the second clamp 171 are both located above the feeding track 21, and the first clamp 161 and the second clamp 171 are respectively clamped and fixed on both sides of the pressing plate 15.

[0069] It can be understood that by setting the first fixing seat 16, the second fixing seat 17, the first clamp 161 and the second clamp 171, the fixing of the pressure plate 15 can be achieved, that is, the pressure plate 15 can be stably fixed above the welding plate 31 by the first clamp 161 and the second clamp 171, so that the pressure plate 15 is not easy to shift when the lead frame is welded, thereby ensuring the welding accuracy and avoiding the welding failure caused by the displacement of the pressure plate 15, which makes it difficult for the lead frame to pass through the gap between the pressure plate 15 and the welding plate 31.

[0070] Furthermore, a blowing mechanism 70 is also provided on the first fixing seat 16, and the blowing mechanism 70 is used to blow away the hot air in the welding window 151. The blowing mechanism 70 includes a blowing cylinder and a blowing hole, wherein the blowing cylinder is arranged between the feeding position 11 and the welding position 13, and the blowing cylinder is located above the feeding track 21, and the blowing hole is obliquely arranged at the bottom side of the blowing cylinder, and the blowing hole faces the welding window 151, so as to blow air into the welding window 151.

[0071] It is understandable that, since the welding plate 31 needs to be heated by the heating plate 14 during welding, the temperature of the welding plate 31 rises during the heating process, that is, hot air is generated, and the hot air gathers at the welding window 151 and moves upward in the vertical direction, affecting the image recognition camera's recognition of the chip position, thereby affecting the welding work of the ultrasonic welding machine 32, and in severe cases, it may lead to poor welding quality or even welding failure. Therefore, by blowing air to the welding window 151 through the blowing mechanism 70, the hot air at the welding window 151 can be blown away, thereby ensuring the welding quality.

[0072] Further, refer to Figure 1 and Fig. 9In order to realize automatic feeding, a feeding mechanism 80 is arranged at the feeding position 11 of the machine body 10, and the feeding mechanism 80 includes a feeding bracket 81, a feeding box 82, a feeding clamping module 83, a pushing module 84, a feeding lifting module 85 and a feeding tray 86, wherein the feeding bracket 81 is fixedly installed at the feeding end of the machine body 10, and the feeding box 82 is arranged in the shape of a rectangular parallelepiped with a hollow interior. Both ends of the feeding box 82 are opened, and one opening of the feeding box 82 is connected to the feeding track 21, and a plurality of lead frames that need to be welded are stacked in layers in the feeding box 82. The feed clamping module 83 is used to clamp the front and rear sides of the feed box 82 so that the feed box 82 can be stably located on the feed bracket 81. The push module 84 is fixedly arranged on one side of the feed bracket 81. The push rod of the push module 84 is arranged on the side of the feed box 82 away from the feeding track 21, and the push module 84 can push the lead frame in the feed box 82 to the feeding track 21 to realize the feeding of the workpiece. The feed lifting module 85 is fixedly installed on the bottom side of the feed bracket 81, and the feed lifting module 85 is used to drive the feed box 82 to rise and fall vertically relative to the feed bracket 81, so that the push module 84 can push the workpieces in the feed box 82 from bottom to top to the feeding track 21 in sequence. The feed tray 86 is fixedly installed on the front end of the feed bracket 81, and the feed tray 86 is used to store the empty feed box 82.

[0073] When feeding, first place the feed box 82 with the layered lead frames stacked on the upper part of the feed bracket 81, align the opening of the feed box 82 with the feeding track 21, and clamp the front and rear sides of the feed box 82 through the feed clamping module 83 to keep the position of the feed box 82 stable. At this time, after a lead frame in the feed box 82 is pushed onto the feeding track 21 by the pushing rod of the pushing module 84, the feed lifting module 85 drives the feed box 82 to descend relative to the feed bracket 81, so that the pushing module 84 can push the lead frame of the next layer onto the feeding track 21, and repeat this process until the lead frame in the feed box 82 is completely pushed out. At this time, the empty feed box 82 is transported to the feed tray 86 for storage through the cooperation of the feeding lifting module 85 and the feeding clamping module 83.

[0074] Further, refer to Figure 1 and Fig.10In order to realize automatic discharging, a discharging mechanism 90 is provided on the discharging end of the body 10, and the discharging mechanism 90 is used to collect the lead frame that has been welded. The discharging mechanism 90 includes a discharging bracket 91, a discharging box 92, a discharging clamping module 93, a discharging lifting module 94 and a discharging tray 95. Among them, the discharging bracket 91 is fixedly installed at the discharging position 12 of the body 10, and the discharging bracket 91 is arranged opposite to the feeding bracket 81. The structure of the discharging box 92 is the same as that of the feeding box 82. One of the openings of the discharging box 92 faces the feeding track 21, and the discharging box 92 is used to receive the workpiece from the cooling plate 50 to the discharging position 12 of the feeding track 21. The discharge clamping module 93 is used to clamp the front and rear sides of the discharge box 92 so that the discharge box 92 can be stably located on the discharge bracket 91. The discharge lifting module 94 is fixedly installed on the bottom side of the discharge bracket 91, and the discharge lifting module 94 is used to drive the discharge box 92 to rise and fall vertically relative to the feed bracket 81, so that the lead frame transported to the discharge position 12 by the feeding track 21 can be stacked in the discharge box 92 from bottom to top. The discharge tray 95 is located at the front end of the discharge bracket 91, and the discharge tray 95 is used to store the discharge box 92 that is already full of lead frames.

[0075] When discharging, first fix the empty discharging box 92 to the upper part of the discharging bracket 91 under the action of the discharging clamping module 93, so that the opening of the discharging box 92 is aligned with the feeding track 21, so that the workpiece transported to the discharging position 12 on the feeding track 21 can smoothly enter the discharging box 92, and when a lead frame is transported to the discharging box 92, the discharging lifting module 94 drives the discharging box 92 to descend relative to the discharging bracket 91, so that the next lead frame can be smoothly transported to the discharging box 92, and so on and so forth until the entire discharging box 92 is stacked with welded lead frames. At this time, the discharging lifting module 94 and the discharging clamping module 93 cooperate to transport the filled discharging box 92 to the discharging tray 95 for storage.

[0076] The above is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A wire bonding machine suitable for extremely narrow frames, characterized in that: include: A machine body (10) is provided with a feeding position (11) and a discharging position (12) at its left and right ends respectively, a welding position (13) is further provided between the feeding position (11) and the discharging position (12), and the feeding position (11), the discharging position (12) and the welding position (13) are all located on the same straight line; A feeding mechanism (20) is arranged between a feeding position (11) and a discharging position (12), and is used to transport the lead frame at the feeding position (11) to a welding position (13) for welding and then transport it to the discharging position (12), comprising a feeding track (21) and a clamping and conveying member (22), wherein the feeding position (11) and the discharging position (12) are respectively located at two ends of the feeding track (21), the feeding track (21) comprises a front track (211) and a rear track (212), and the clamping and conveying member (22) is used to transport the lead frame in the feeding track (21) from the feeding position (11) to the welding position (13) and the discharging position (12) in sequence along the length direction of the feeding track (21); A welding mechanism (30) comprising a welding plate (31) disposed in a feeding track (21) and an ultrasonic welding machine (32) disposed on a machine body (10), wherein the welding plate (31) is located at a welding position (13), and a welding head of the ultrasonic welding machine (32) is located above the welding plate (31); A preheating plate (40) is arranged in the feeding track (21), connected to the feeding position (11) and the welding position (13), and is used to preheat the lead frame; A cooling plate (50) is arranged in the feeding track (21), connected to the welding position (13) and the discharge position (12), and is used to cool the lead frame; as well as The extremely narrow frame mechanism comprises two cover plates (61) respectively arranged on a preheating plate (40) and a cooling plate (50), a first limiting groove (62) opened on a front track (211), and a plurality of limiting columns (63) arranged on a welding plate (31); the two cover plates (61) are both located on a side of the preheating plate (40) and the cooling plate (50) away from the front track (211), and the two cover plates (61) cooperate with the preheating plate (40) and the cooling plate (50) to form a second limiting groove (64) for limiting one side of a lead frame; the first limiting groove (62) cooperates with the second limiting groove (64) to limit both sides of the lead frame; the plurality of limiting columns (63) are arranged along the length direction of the welding plate (31), and the limiting columns (63) cooperate with the first limiting groove (62) to limit both sides of the lead frame.

2. A wire bonding machine suitable for an extremely narrow frame according to claim 1, characterized in that: The preheating plate (40), the cooling plate (50) and the cover plate (61) are all detachably arranged.

3. A wire bonding machine suitable for an extremely narrow frame according to claim 1, characterized in that: The number of the clamping and conveying members (22) is two, and the two clamping and conveying members (22) are respectively and correspondingly arranged between the feeding position (11) and the welding position (13) and between the welding position (13) and the discharging position (12).

4. A wire bonding machine suitable for an extremely narrow frame according to claim 1, characterized in that: A pressing plate (15) is fixedly arranged above the welding plate (31), and the pressing plate (15) cooperates with the welding plate (31) to form a gap for the lead frame to pass through, and a welding window (151) is provided on the pressing plate (15) so that the welding head of the ultrasonic welding machine (32) can weld the lead frame in the welding window (151).

5. A wire bonding machine suitable for an extremely narrow frame according to claim 4, characterized in that: The machine body (10) is provided with a first fixed seat (16) and a second fixed seat (17), the first fixed seat (16) and the second fixed seat (17) are respectively arranged between the feeding position (11) and the welding position (13) and between the welding position (13) and the discharging position (12), the first fixed seat (16) and the second fixed seat (17) are respectively provided with a first clamp (161) and a second clamp (171), the first clamp (161) and the second clamp (171) are both located above the feeding track (21), and the first clamp (161) and the second clamp (171) are respectively clamped and fixed on both sides of the pressing plate (15).

6. A wire bonding machine suitable for an extremely narrow frame according to claim 5, characterized in that: The first fixing seat (16) is also provided with a blowing mechanism (70), and the blowing mechanism (70) is used to blow away the hot air in the welding window (151), and the blowing mechanism (70) comprises: The blowing cylinder is arranged between the feeding position (11) and the welding position (13) and is located above the feeding track (21); The blowing hole is obliquely arranged on the bottom side of the blowing cylinder and faces the welding window (151) so as to blow air into the welding window (151).

7. A wire bonding machine suitable for an extremely narrow frame according to claim 1, characterized in that: The machine body (10) is also provided with a heating plate (14), the heating plate (14) being arranged below the welding plate (31), and the heating plate (14) being used to heat the lead frame transmitted to the welding plate (31) so as to facilitate welding by the welding mechanism (30).

8. A wire bonding machine suitable for an extremely narrow frame according to claim 1, characterized in that: The welding mechanism (30) further comprises an XY motion platform (33) arranged on the machine body (10) and an image recognition camera arranged on the ultrasonic welding machine (32); the ultrasonic welding machine (32) is fixedly arranged on the XY motion platform (33); and the image recognition camera is arranged at the welding head of the ultrasonic welding machine (32).

9. A wire bonding machine suitable for an extremely narrow frame according to claim 1, characterized in that: A feeding mechanism (80) is provided at the feeding position (11), and the feeding mechanism (80) comprises: A feed support (81) is fixedly arranged at a feed position (11) of the machine body (10); A feed box (82) is arranged on the feed support (81), and a plurality of lead frames to be welded are stacked in layers inside the feed box; A feed clamping module (83), arranged on the feed bracket (81), and used for clamping the front and rear sides of the feed box (82); A pushing module (84), arranged on the feeding support (81), for pushing the lead frame in the feeding box (82) into the feeding track (21); A feed lifting module (85), disposed on the feed support (81), for driving the feed box (82) to vertically lift relative to the feed support (81); and A feed tray (86) is used to store the feed box (82).

10. A wire bonding machine suitable for an extremely narrow frame according to claim 9, characterized in that: The discharging position (12) is provided with a discharging mechanism (90), and the discharging mechanism (90) comprises: A discharging support (91) is fixedly arranged at a discharging position (12) of the machine body (10); A discharge box (92) is arranged on the discharge bracket (91); A discharge clamping module (93), arranged on the discharge bracket (91), and used for clamping the front and rear sides of the discharge box (92); a discharge lifting module (94), arranged on the feed support (81), and used for driving the feed box (82) to vertically lift relative to the feed support (81), so that the lead frames in the conveying track are sequentially stacked in the discharge box (92); and The discharge tray (95) is used to store the feed box (82).

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