Lead frame denting mechanism

Abstract

The utility model discloses a lead frame denting mechanism which comprises a base, a guide groove is formed in the top face of the base, a top plate is connected to the top face of the base in a lifting mode, two clamping mechanisms in mirror symmetry are movably connected to the bottom face of the top plate, and a hammering mechanism is arranged between the two clamping mechanisms. The beating mechanism is fixed to the bottom face of the top plate. The bottom surface of the top plate is telescopically connected with the clamping mechanism, when the lead frame is beaten, the clamping and feeding effects are achieved, the outer edge of the sleeve shaft is sleeved with the rubber sleeve, the situation that the lead frame is deformed due to the fact that the clamping mechanism presses the lead frame too tightly is avoided, and the service life of the lead frame is prolonged. And meanwhile, the lead frame does not need to be manually supported for hammering, so that the two hands of an operator are prevented from being injured by equipment under the condition of misoperation.

Description

Technical Field

[0001] The utility model relates to the technical field of lead frame production, in particular to a concave punching mechanism for a lead frame. Background Technique

[0002] As a chip carrier for integrated circuits, a lead frame is a key structural component that realizes the electrical connection between the internal circuit lead-out ends of a chip and external leads through a bonding material (gold wire, aluminum wire, copper wire) to form an electrical loop. It plays a role as a bridge for connecting with external wires. Lead frames are required in most semiconductor integrated circuits and are important basic materials in the electronic information industry.

[0003] Before installing the base island on the lead frame, it is necessary to punch a groove on its surface so as to install the base island in the lead frame. However, the lead frame is relatively soft, and when punching, it can only be punched by holding the lead frame by hand, which easily causes the operator's hands to be hit by the punching end in case of operation errors. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and a concave punching mechanism for a lead frame is proposed.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a concave punching mechanism for a lead frame, including a base, a guiding groove is opened on the top surface of the base, a top plate is connected to the top surface of the base in a lifting manner, two mirror-symmetrical clamping mechanisms are movably connected to the bottom surface of the top plate, and a punching mechanism is arranged between the two clamping mechanisms, and the punching mechanism is fixed to the bottom surface of the top plate.

[0006] As a further description of the above technical scheme: a lifting motor is vertically fixed at each of the four corners of the top surface of the base, the output end of each lifting motor is respectively connected to a guide post in a transmission manner, and each guide post is vertically fixed to the bottom surface of the top plate.

[0007] As a further description of the above technical scheme: the clamping mechanism includes a U-shaped plate telescopically connected to the bottom surface of the top plate, a plurality of equally spaced sleeve shafts are rotatably connected inside the U-shaped plate, a rubber sleeve is fixedly sleeved on the outer edge of each sleeve shaft, a first driving motor is horizontally fixed on the outside of the U-shaped plate, and the output end of the first driving motor is connected to one of the sleeve shafts in a transmission manner.

[0008] As a further description of the above technical solution: a plurality of blind holes are vertically formed in the bottom surface of the top plate at equal intervals. Two mirror-symmetrical first sliding grooves are axially formed in each blind hole. A first slider is slidably connected in each first sliding groove. A guide rod is fixedly arranged between the two first sliders. The guide rod is perpendicular to the top surface of the U-shaped plate. A first spring is fixedly arranged between the blind hole and the guide rod.

[0009] As a further description of the above technical solution: the hammering mechanism includes two chassis fixed to the bottom surface of the top plate. A driving member is movably connected in each chassis. The end of the driving member slidably penetrates through the chassis. A convex block is fixedly arranged at the common end of the two driving members. A groove adapted to the convex block is vertically formed in the top surface of the guiding groove.

[0010] As a further description of the above technical solution: the driving member includes a rotating shaft horizontally rotatably connected in the chassis. A cam is fixedly sleeved on the outer edge of the rotating shaft. A push plate is attached to the lower part of the cam. Two mirror-symmetrical second sliding grooves are vertically formed in the inner wall of the chassis. A second slider is slidably connected in each second sliding groove. The second slider is fixedly connected to the push plate. A push rod is perpendicularly fixed to the bottom surface of the push plate. The push rod axially slides through the chassis and is perpendicularly fixed to the convex block. A second spring is sleeved on the outer edge of the push rod. A second driving motor is horizontally fixed outside the chassis. The output end of the second driving motor is in transmission connection with the end of the rotating shaft.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the prior art, in the lead frame denting mechanism, by telescopically connecting the clamping mechanism to the bottom surface of the top plate, when the lead frame is being hammered, it plays a role of clamping and feeding. By sleeving a rubber sleeve on the outer edge of the sleeve shaft, it avoids the clamping mechanism pressing the lead frame too tightly, resulting in deformation of the lead frame. At the same time, there is no need to manually support the lead frame for hammering, thus avoiding the operator's hands being injured by the equipment in case of misoperation. Description of the Drawings

[0013] Figure 1 is a three-dimensional overall structure diagram of a lead frame denting mechanism proposed by the utility model;

[0014] Figure 2 is a front view of the overall structure of a lead frame denting mechanism proposed by the utility model;

[0015] Figure 3 is a side sectional view of the overall structure of a lead frame denting mechanism proposed by the utility model;

[0016] Figure 4The structure enlarged view of part A in a concave - forming mechanism for a lead frame proposed by the present utility model Figure 3 in the [mechanism];

[0017] Figure 5 The structure enlarged view of part B in a concave - forming mechanism for a lead frame proposed by the present utility model Figure 3 in the [mechanism];

[0018] Figure 6 The structure enlarged view of part C in a concave - forming mechanism for a lead frame proposed by the present utility model Figure 3 in the [mechanism].

[0019] Legend description:

[0020] 1. Base; 2. Guide groove; 3. Lifting motor; 4. Guide post; 5. Top plate; 6. U - shaped plate; 7. Guide rod; 8. First driving motor; 9. Rubber sleeve; 10. Chassis; 11. Second driving motor; 12. Push rod; 13. Convex block; 14. Sleeve shaft; 15. Cam; 16. Rotating shaft; 17. Push plate; 18. Second spring; 19. First spring; 20. Blind hole; 21. First sliding groove; 22. First slider. Specific implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Refer to Figures 1 to 6, a concave - forming mechanism for a lead frame provided by the utility model: It includes a base 1. A guide groove 2 is opened on the top surface of the base 1. A top plate 5 is vertically connected to the top surface of the base 1 in a lifting manner. Four lifting motors 3 are vertically fixed at the four corners of the top surface of the base 1 respectively. The output end of each lifting motor 3 is drivingly connected to a guide post 4 respectively. Each guide post 4 is vertically fixed on the bottom surface of the top plate 5. Two mirror - symmetric clamping mechanisms are movably connected to the bottom surface of the top plate 5. A hammering mechanism is arranged between the two clamping mechanisms. The hammering mechanism is fixed on the bottom surface of the top plate 5. The clamping mechanism includes a U - shaped plate 6 telescopically connected to the bottom surface of the top plate 5. A plurality of equally - spaced blind holes 20 are vertically opened on the bottom surface of the top plate 5. Two mirror - symmetric first sliding grooves 21 are axially opened in each blind hole 20. A first slider 22 is slidably connected in each first sliding groove 21. A guide rod 7 is jointly fixed between the two first sliders 22. The guide rod 7 is perpendicular to the top surface of the U - shaped plate 6. A first spring 19 is jointly fixed between the blind hole 20 and the guide rod 7. A plurality of equally - spaced sleeve shafts 14 are rotatably connected in the U - shaped plate 6. A rubber sleeve 9 is fixedly sleeved on the outer edge of each sleeve shaft 14. A first driving motor 8 is horizontally fixed on the outside of the U - shaped plate 6. The output end of the first driving motor 8 is drivingly connected to one of the sleeve shafts 14;

[0023] The hammering mechanism includes two chassis 10 fixed on the bottom surface of the top plate 5. A driving part is movably connected in each chassis 10. The end of the driving part slides through the chassis 10. A convex block 13 is jointly fixed at the ends of the two driving parts. A groove adapted to the convex block 13 is vertically opened on the top surface of the guide groove 2. The driving part includes a rotating shaft 16 horizontally rotatably connected in the chassis 10. A cam 15 is fixedly sleeved on the outer edge of the rotating shaft 16. A push plate 17 is attached to the lower part of the cam 15. Two mirror - symmetric second sliding grooves are vertically opened on the inner wall of the chassis 10. A second slider is slidably connected in each second sliding groove. The second slider is fixedly connected to the push plate 17. A push rod 12 is vertically fixed on the bottom surface of the push plate 17. The push rod 12 axially slides through the chassis 10 and is perpendicularly fixed to the convex block 13. A second spring 18 is sleeved on the outer edge of the push rod 12. A second driving motor 11 is horizontally fixed outside the chassis 10. The output end of the second driving motor 11 is drivingly connected to the end of the rotating shaft 16.

[0024] By telescopically connecting the clamping mechanism to the bottom surface of the top plate 5, when the lead frame is being hammered, it plays a role in clamping and feeding. By fixedly sleeving the rubber sleeve 9 on the outer edge of the sleeve shaft 14, it avoids the clamping mechanism pressing the lead frame too tightly, resulting in deformation of the lead frame. At the same time, there is no need to manually support the lead frame during hammering, thus avoiding the operator's hands being injured by the equipment in case of a misoperation.

[0025] Working principle: When in use, place the lead frame to be hammered on the guiding groove 2. The lifting motor 3 drives the top plate 5 to descend. The top plate 5 drives the U-shaped plate 6 to descend, so that the rubber sleeve 9 presses on the top surface of the lead frame. At the same time, the first spring 19 is compressed, enabling the convex block 13 to continue descending until the bottom surface of the convex block 13 fits the top surface of the lead frame. Then, the second driving motor 11 drives the convex block 13 to move up and down reciprocally through the cam 15, the second spring 18, the push rod 12 and the push plate 17 to hammer grooves on the lead frame. Meanwhile, the first driving motor 8 drives the sleeve shaft 14 to rotate, and the sleeve shaft 14 drives the rubber sleeve 9 to rotate, so that the rubber sleeve 9 automatically feeds the lead frame components.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lead frame dimpling mechanism, comprising a base (1), characterized in that: The top surface of the base (1) is provided with a guide groove (2), the top surface of the base (1) is connected to a top plate (5) in a lifting manner, the bottom surface of the top plate (5) is movably connected to two mirror-symmetrical clamping mechanisms, a hammering mechanism is provided between the two clamping mechanisms, and the hammering mechanism is fixed to the bottom surface of the top plate (5).

2. The concave forming mechanism for a lead frame according to claim 1, wherein: A lifting motor (3) is vertically fixed to each of the four corners of the top surface of the base (1); the output end of each lifting motor (3) is transmission-connected to a guide column (4); and each guide column (4) is vertically fixed to the bottom surface of the top plate (5).

3. The concave mechanism for a lead frame according to claim 1, characterized in that: The clamping mechanism comprises a U-shaped plate (6) telescopically connected to the bottom surface of the top plate (5), a plurality of equally spaced sleeve shafts (14) rotatably connected inside the U-shaped plate (6), a rubber sleeve (9) being fixedly sleeved on the outer edge of each sleeve shaft (14), a first drive motor (8) being horizontally fixed on the outer side of the U-shaped plate (6), and an output end of the first drive motor (8) being drivingly connected to one of the sleeve shafts (14).

4. A concave mechanism for a lead frame according to claim 3, characterized in that: The bottom surface of the top plate (5) is vertically provided with a plurality of equally spaced blind holes (20), each of the blind holes (20) is axially provided with two mirror-symmetrical first slide grooves (21), each of the first slide grooves (21) is slidably connected with a first slider (22), a guide rod (7) is fixed between the two first sliders (22), the guide rod (7) is vertically disposed on the top surface of the U-shaped plate (6), and a first spring (19) is fixed between the blind hole (20) and the guide rod (7).

5. The concave mechanism for a lead frame according to claim 1, wherein: The hammering mechanism comprises two chassis (10) fixed to the bottom surface of the top plate (5), each of the chassis (10) being movably connected to a driving member, the ends of the driving members slidingly passing through the chassis (10), the ends of the two driving members jointly fixing a protrusion (13), and the top surface of the guide groove (2) being vertically provided with a groove adapted to the protrusion (13).

6. The concave forming mechanism for a lead frame according to claim 5, characterized in that: The driving member comprises a rotating shaft (16) horizontally rotatably connected in the chassis (10); the outer edge of the rotating shaft (16) is fixedly sleeved with a cam (15); the lower part of the cam (15) is fitted with a push plate (17); the inner wall of the chassis (10) is vertically provided with two second sliding grooves which are mirror-symmetrical; a second sliding block is slidably connected in each of the second sliding grooves; the second sliding block is fixedly connected to the push plate (17); a push rod (12) is vertically fixed to the bottom surface of the push plate (17); the push rod (12) axially slides through the chassis (10) and is vertically fixed to the protrusion (13); the outer edge of the push rod (12) is sleeved with a second spring (18); a second driving motor (11) is horizontally fixed to the outside of the chassis (10); the output end of the second driving motor (11) is drivingly connected to the end of the rotating shaft (16).

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