Welding device for pin frame

Abstract

The utility model relates to the technical field of pin frame welding, in particular to a welding device for a pin frame, which comprises a device body, a conveying belt is mounted on the device body, a pushing air cylinder is arranged on the bottom side of the conveying belt, a support frame is mounted on one side of the pushing air cylinder, and a pushing piece is movably connected onto the support frame. And a welding frame is installed on the outer side of the pushing piece, a frame body is connected to the welding frame, a positioning mechanism is connected to the top face of the frame body, a placing mechanism is movably connected to the device body, and the device body is a double-layer workbench. According to the scheme, the possibility that the frame is deformed in the process of clamping and positioning the frame is reduced, the possibility that manual positioning and placing are needed in the chip welding process is reduced, the positioning effect of the device on the frame is improved, deformation is not prone to being generated, the frequency of manual operation is reduced, the automation effect is improved, and the production efficiency is improved. And automatic movement and positioning placement of the chip can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of lead frame welding, in particular to a welding device for a lead frame. Background Art

[0002] The main reason for welding the lead frame is to achieve electrical connection and mechanical fixation. In the semiconductor packaging process, the lead frame is a key part that carries the chip and connects to the external circuit. Through welding, the electrodes on the chip can be connected to the pins on the lead frame to form a stable electrical path to ensure smooth transmission of current and signals. Therefore, a lead frame welding device is required.

[0003] Patent announcement number CN 212885933 U announces a lead frame welding device, which uses a second spring to position the frame with a protective pad, and uses the cooperation of a pressure plate and a support block to remove the frame. The operation is convenient and practical, but the frame is usually made of metal and is relatively easy to deform. Fixing by clamping may cause the risk of deformation of the frame. When taking it out, the support block will be pushed out from the bottom. When the frame is subjected to force on three sides, it is more likely to deform. At the same time, manual precise placement is required when welding the chip. For this reason, a lead frame welding device is proposed. Summary of the invention

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a welding device for a lead frame.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A welding device for a lead frame comprises a device body, a conveyor belt is installed on the device body, a pushing cylinder is arranged on the bottom side of the conveyor belt, a support frame is installed on one side of the pushing cylinder, a push piece is movably connected to the support frame, a welding frame is installed on the outer side of the push piece, the welding frame is connected to the frame body, a positioning mechanism is connected to the top surface of the frame body, a placing mechanism is movably connected to the device body, and the device body is a double-layer workbench.

[0007] Preferably, the conveyor belt is installed on the second layer of the device body, a downhill plate is provided on one side of the conveyor belt, a conveyor roller is installed on one end of the bottom layer of the device body, and the conveyor belt and conveyor roller are both electrically driven.

[0008] Preferably, rollers are installed on the outer surfaces of both sides of one end of the welding frame, the rollers are movably connected to the inner wall surface of the bottom layer of the device body, the welding frame is rotatably connected in the device body, and the other end of the welding frame is adapted to the position of the downslope plate.

[0009] Preferably, multiple sections of protective strips are symmetrically installed on both sides of the welding frame, gaps are set between the protective strips, one end of the welding frame is movably connected to a limit block, the limit block is located on one side of the rotating roller, a hydraulic groove is opened on the inner side of the welding frame, liquid oil is contained in the hydraulic groove, and one end of the hydraulic groove is connected to the bottom side of the limit block.

[0010] Preferably, a plurality of wall grooves are provided on the inner wall of the bottom layer of the device body, and the positions of the wall grooves correspond to the positions of the gaps. The positioning mechanism is provided with a plurality of rotatable connections in the wall grooves, and the positioning mechanism includes a rotating rod, an adjustment plate and a limit bar. One end of the adjustment plate is rotatably connected to the bottom side of the wall groove, and the rotating rod is threadedly connected to the other end of the adjustment plate. One end of the rotating rod passes through the inner side surface of the adjustment plate and is connected to the frame body. The limit bar is rotatably connected to the outer side surface of the adjustment plate, and the limit bar is movably connected to the outside of the wall groove.

[0011] Preferably, the placement mechanism includes a movable frame, a sliding rod, and a chip frame. Electric screws are installed on the top surfaces of both sides of the bottom layer of the device body, and the movable frames are threadedly connected to the screws. The sliding rods are fixedly installed between the two movable frames. The chip frame is slidably connected to the outer surface of the sliding rod. Card strips are symmetrically installed on both sides outside the chip frame, and one end of the card strips is movably connected to the inner side of the chip frame. A take-up roller is installed on the movable frame, and a pull rope is installed between the take-up roller and the chip frame.

[0012] Preferably, the pushing cylinder and the supporting frame are both installed on the bottom layer of the device body, the telescopic end of the pushing cylinder is connected to one side of the pushing piece, and the other side of the pushing piece is connected to the frame body.

[0013] The beneficial effects of the utility model are:

[0014] This solution can realize automatic loading of the frame body through the rotation of the welding frame and the transmission of the conveyor belt, the limit block can be used to block the movement of the frame, the positioning mechanism can be used to clamp the frame body, the placement mechanism can facilitate the accurate placement of the chip, and the push cylinder can push the frame body into the conveyor roller to complete the unloading.

[0015] This solution reduces the possibility of frame deformation during the process of clamping and positioning the frame, reduces the possibility of manual positioning and placement during chip welding, improves the positioning effect of the device on the frame, is not easy to cause deformation, reduces the frequency of manual operation, improves the automation effect, and can realize automatic movement and positioning of the chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a structural schematic diagram of a lead frame welding device proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the top view of a lead frame welding device proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of a lead frame welding device during loading of the lead frame provided by the utility model;

[0019] Figure 4 It is a structural schematic diagram of the welding frame part;

[0020] Figure 5 It is a schematic diagram of the main structure of the welding frame;

[0021] Figure 6 It is a structural diagram of the placement mechanism part.

[0022] In the figure: 1. Device body; 2. Conveyor belt; 3. Push cylinder; 4. Push sheet; 5. Support frame; 6. Welding frame; 7. Screw rod; 8. Placement mechanism; 9. Positioning mechanism; 91. Turn bar; 92. Adjustment plate; 93. Limit strip; 10. Frame body; 11. Conveyor roller; 12. Limit block; 13. Take-up roller; 14. Chip frame; 15. Card strip; 16. Slide rod; 17. Liquid oil. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Example: Refer to Figure 1-6A lead frame welding device comprises a device body 1, a conveyor belt 2 is installed on the device body 1, and the conveyor belt 2 is installed on the second layer of the device body 1 to facilitate the automatic loading of materials. A downslope plate is arranged on one side of the conveyor belt 2 to enable the materials to slide down along the slope. A conveying roller 11 is installed on one end of the bottom layer of the device body 1 to facilitate the output of materials during welding. The conveyor belt 2 and the conveyor roller 11 are both electrically driven. A pushing cylinder 3 is arranged on the bottom side of the conveyor belt 2, and a support frame 5 is installed on one side of the pushing cylinder 3. A push piece 4 is movably connected to the support frame 5, and a welding frame 6 is installed on the outer side of the push piece 4. A frame body 10 is connected to the welding frame 6. A positioning mechanism 9 is connected to the top surface of the frame body 10, and a placing mechanism 8 is movably connected to the device body 1. The device body 1 is a double-layer workbench, and a plurality of wall grooves are opened on the inner wall of the bottom layer of the device body 1. The positions of the wall grooves correspond to the positions of the gaps, so as to facilitate the adjustment of the plate 92 between the gaps. The positioning mechanism 9 is provided with a plurality of parts which are rotatably connected in the wall groove. The positioning mechanism 9 includes a rotating rod 91, an adjusting plate 92 and a limiting strip 93. One end of the adjusting plate 92 is rotatably connected to the bottom side of the wall groove. The rotating rod 91 is threadedly connected to the other end of the adjusting plate 92. One end of the rotating rod 91 passes through the inner side surface of the adjusting plate 92 and is connected to the frame body 10. It acts on the clamping and positioning of the frame body 10. The limiting strip 93 is rotatably connected to the outer side surface of the adjusting plate 92. The limiting strip 93 is movably connected to the outer and inner sides of the wall groove, which can facilitate the vertical support of the positioning mechanism 9 when not in use and avoid the possibility of loosening of the adjusting plate 92 when in use. The pushing cylinder 3 and the supporting frame 5 are both installed on the bottom layer of the device body 1. The telescopic end of the pushing cylinder 3 is connected to one side of the pushing piece 4, and the other side of the pushing piece 4 is connected to the frame body 10 to facilitate the delivery of the frame body 10. The position between the supporting frame 5 and the welding frame 6 is adapted.

[0025] In the present embodiment, rollers are installed on the outer surfaces of both sides of one end of the welding frame 6, and the rollers are movably connected to the inner wall surface of the bottom layer of the device body 1. A motor is installed at one end of the roller to facilitate the angle adjustment of the welding frame 6. The welding frame 6 is rotatably connected in the device body 1, and the other end of the welding frame 6 is adapted to the position of the downslope plate to facilitate the accurate sliding of the material into the welding frame 6. Multiple sections of protective strips are symmetrically installed on both sides of the welding frame 6 to avoid the displacement of the material position, and gaps are set between the protective strips. One end of the welding frame 6 is movably connected to the limiting block 12, and the limiting block 12 is located on one side of the roller to limit the position of the frame body 10. A hydraulic groove is opened on the inner side of the welding frame 6, and liquid oil 17 is contained in the hydraulic groove. One end of the hydraulic groove is connected to The bottom side of the limit block 12 facilitates the liquid to push the limit block 12 out to complete the limiting effect. The placement mechanism 8 includes a movable frame, a slide rod 16, and a chip frame 14. Electric screw rods 7 are installed on the top surfaces of both sides of the bottom layer of the device body 1. The screw rods 7 are threadedly connected to the movable frame. The slide rod 16 is fixedly installed between the two movable frames. The chip frame 14 is slidably connected to the outer surface of the slide rod 16. The two sides outside the chip frame 14 are symmetrically installed with card strips 15. One end of the card strip 15 is movably connected to the inner side of the chip frame 14, which can facilitate the support of the chip after it is placed in, and facilitate the falling of the chip after it is pulled out. The movable frame is installed with a take-up roller 13, and a pull rope is installed between the take-up roller 13 and the chip frame 14 to facilitate the movement of the chip frame 14.

[0026] Working principle: first control the motor to rotate. Under the rotation of the motor, the welding frame 6 will rotate to correspond to the position of the downhill plate. At this time, the welding frame 6 is in an inclined state, and the liquid oil 17 will flow downward. Under the action of the hydraulic pressure, the limit block 12 will rise, and the frame body 10 will be placed in the conveyor belt 2. Under the conveyance of the conveyor belt 2, the frame body 10 will slide into the welding frame 6 along the downhill plate. The limit block 12 will block the position of the frame body 10. After completion, the motor rotates again to restore the position of the welding frame 6. At this time, the liquid level returns to a horizontal state, and the limit block 12 will drop. At this time, the limit bar 93 is rotated to rotate the adjustment plate 92 ninety degrees. After the rotation, the limit bar 93 is rotated again to The position of the adjustment plate 92 is positioned, and the rotating rod 91 is rotated at this time so that the bottom end of the rotating rod 91 is pressed on the frame body 10 to position it. When multiple positioning mechanisms 9 are positioned, the screw rod 7 is controlled to rotate. Driven by the screw rod 7, the placement mechanism 8 will move to the specified area. At this time, the take-up roller 13 is controlled to rotate to move the chip rack 14 to a precise position, and then the card strip 15 is pulled outward, and the chip will fall at a precise position. After completion, the screw rod 7 will move the placement mechanism 8 to the upper side of the push sheet 4, and the positioning mechanisms 9 are controlled to be loosened. At this time, the push cylinder 3 is controlled to push the push sheet 4 forward, and the push sheet 4 will push the frame body 10 into the conveying roller 11 for easy output.

[0027] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0028] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lead frame welding device, characterized in that: include: A device body (1) is provided with a conveyor belt (2), a push cylinder (3) is provided on the bottom side of the conveyor belt (2), a support frame (5) is provided on one side of the push cylinder (3), a push plate (4) is movably connected to the support frame (5), a welding frame (6) is provided on the outer side of the push plate (4), a frame body (10) is connected to the welding frame (6), a positioning mechanism (9) is connected to the top surface of the frame body (10), a placement mechanism (8) is movably connected to the device body (1), and the device body (1) is a double-layer workbench.

2. A lead frame welding device according to claim 1, characterized in that: The conveyor belt (2) is installed on the second layer of the device body (1), a downhill plate is provided on one side of the conveyor belt (2), a conveyor roller (11) is installed on one end of the bottom layer of the device body (1), and both the conveyor belt (2) and the conveyor roller (11) are electrically driven.

3. A lead frame welding device according to claim 2, characterized in that: Rollers are installed on both sides of the outer surface of one end of the welding frame (6), and the rollers are movably connected to the inner wall surface of the bottom layer of the device body (1). The welding frame (6) is rotatably connected in the device body (1), and the other end of the welding frame (6) is adapted to the position of the downslope plate.

4. A lead frame welding device according to claim 3, characterized in that: A plurality of protective strips are symmetrically mounted on both sides of the welding frame (6), with gaps being provided between the protective strips. One end of the welding frame (6) is movably connected to a limit block (12), the limit block (12) being located on one side of the rotating roller. A hydraulic groove is provided on the inner side of the welding frame (6), liquid oil (17) is contained in the hydraulic groove, and one end of the hydraulic groove is connected to the bottom side of the limit block (12).

5. A lead frame welding device according to claim 4, characterized in that: A plurality of wall grooves are provided on the inner wall of the bottom layer of the device body (1), the positions of the wall grooves corresponding to the positions of the gaps, the positioning mechanism (9) is provided with a plurality of rotatably connected in the wall grooves, the positioning mechanism (9) comprises a rotating rod (91), an adjusting plate (92) and a limiting strip (93), one end of the adjusting plate (92) is rotatably connected to the bottom side of the wall groove, the rotating rod (91) is threadedly connected to the other end of the adjusting plate (92), one end of the rotating rod (91) passes through the inner side surface of the adjusting plate (92) and is connected to the frame body (10), the limiting strip (93) is rotatably connected to the outer side surface of the adjusting plate (92), and the limiting strip (93) is movably connected to the outer side of the wall groove.

6. A lead frame welding device according to claim 1, characterized in that: The placement mechanism (8) comprises a movable frame, a slide bar (16), and a chip frame (14); electric screw rods (7) are installed on the top surfaces of both sides of the bottom layer of the device body (1); the movable frame is threadedly connected to the screw rods (7); the slide bar (16) is fixedly installed between the two movable frames; the chip frame (14) is slidably connected to the outer surface of the slide bar (16); clamping strips (15) are symmetrically installed on both sides outside the chip frame (14); one end of the clamping strip (15) is movably connected to the inner side of the chip frame (14); a take-up roller (13) is installed on the movable frame; and a pull rope is installed between the take-up roller (13) and the chip frame (14).

7. A lead frame welding device according to claim 1, characterized in that: The pushing cylinder (3) and the support frame (5) are both installed on the bottom layer of the device body (1); the telescopic end of the pushing cylinder (3) is connected to one side of the pushing piece (4); and the other side of the pushing piece (4) is connected to the frame body (10).

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