Lead frame flatness detection tool

Abstract

The utility model discloses a lead frame flatness detection tool comprising a groove body, the top surface of the groove body is movably connected with a rack, the bottom surface of the rack is connected with a hollow shaft in a lifting manner, a negative pressure member is arranged right below the hollow shaft, the negative pressure member is arranged in the groove body, and the outer side of the groove body is fixedly connected with a controller. And the controller is electrically connected with the negative pressure piece. According to the utility model, the top surface of the groove body is movably connected with the rack, the pressure sensor electrically connected with the controller is fixed in the rack, the tail end of the pressure sensor is connected with the hollow shaft through the lifting motor and the U-shaped plate in a lifting manner, and whether the copper sheet is flat or not is judged according to the change of the pressure value when the hollow shaft rolls on the copper sheet; on the premise that the copper strip is not damaged, the accuracy and the convenience of measurement are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lead frame detection tooling, in particular to a lead frame flatness detection tooling. Background Technique

[0002] During the processing and production of copper strips for lead frames, the strips are unevenly deformed during rolling, resulting in uneven copper strips. As one of the technical indicators of lead frame materials, domestic manufacturers generally use the wave crest measurement method. The wave crest measurement method is as follows: The copper strip is placed flat on the detection platform naturally, and a ruler is used to measure the wave crest of the raised wave of the copper strip, which is the flatness value of the copper strip.

[0003] At present, the flatness requirement for copper strips used in some high-precision lead frames has reached below 1 mm. Since the wave crest measurement method uses a ruler as the measurement tool, this measurement method and tool can no longer meet the requirements of the increasingly developed copper strips for lead frames for detection means. If only a traditional mechanical micrometer is used for direct measurement, the measurement end is prone to pressing the copper strip to rebound, seriously affecting the measurement accuracy. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and a lead frame flatness detection tooling is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: A lead frame flatness detection tooling, including a groove body, the top surface of the groove body is movably connected with a frame, the bottom surface of the frame is connected with a hollow shaft in a lifting manner, a negative pressure member is arranged directly below the hollow shaft, the negative pressure member is arranged in the groove body, the outside of the groove body is fixedly connected with a controller, and the controller is electrically connected with the negative pressure member.

[0006] As a further description of the above technical scheme: A threaded hole horizontally penetrates through each of the two sides of the frame, a screw rod is threadedly connected in each threaded hole, one end of each screw rod is rotatably connected with a support plate, the support plate is fixed on the top surface of the groove body, and the other end is drivingly connected with a driving motor, and the driving motor is horizontally fixed on the top surface of the groove body.

[0007] As a further description of the above technical scheme: Two mirror-symmetrical pressure sensors are vertically embedded in the top wall of the frame, and both pressure sensors are electrically connected with the controller.

[0008] As a further description of the above technical scheme: A lifting motor is attached to the end of each pressure sensor, the lifting motor is vertically fixed on the top wall of the frame, the output end of each lifting motor is drivingly connected with a guide rod, and the ends of the two guide rods are jointly fixed with a U-shaped plate, and the hollow shaft is rotatably connected in the U-shaped plate.

[0009] As a further description of the above technical solution: The negative pressure component includes a leakage plate fixedly connected inside the tank body. A gas pump is horizontally embedded in the rear side of the tank body. The gas pump is communicated with the inside of the tank body through a trachea, and the gas pump is electrically connected to the controller.

[0010] As a further description of the above technical solution: A sponge sleeve is fixedly sleeved outside the hollow shaft. A plurality of equally spaced leakage holes radially penetrate through the outside of the hollow shaft, and dark pigment is filled inside the hollow shaft.

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

[0012] Compared with the prior art, for this lead frame flatness detection tooling, by movably connecting a frame to the top surface of the tank body, fixedly installing a pressure sensor electrically connected to the controller inside the frame, and connecting a hollow shaft to the end of the pressure sensor through a lifting motor and a U-shaped plate for lifting, the change in the pressure value when the hollow shaft rolls on the copper sheet is used to determine whether the copper sheet is flat, improving the measurement accuracy and convenience without damaging the copper strip. Description of the Drawings

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

[0014] Figure 2 is a side sectional view of the overall structure of a lead frame flatness detection tooling proposed by the utility model;

[0015] Figure 3 is a side sectional view of the overall structure of the hollow shaft of a lead frame flatness detection tooling proposed by the utility model.

[0016] Legend Explanation:

[0017] 1. Tank body; 2. Leakage plate; 3. Controller; 4. Driving motor; 5. Screw; 6. Threaded hole; 7. Frame; 8. U-shaped plate; 9. Lifting motor; 10. Guide rod; 11. Sponge sleeve; 12. Support plate; 13. Gas pump; 14. Pressure sensor; 15. Hollow shaft; 16. Leakage hole. Specific Embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the 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 the 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.

[0019] Refer toFigures 1 to 3 , a flatness detection tooling for a lead frame provided by the utility model: It includes a groove body 1, the top surface of the groove body 1 is movably connected to a frame 7, two threaded holes 6 are horizontally penetrated through both sides of the frame 7, each threaded hole 6 is threadedly connected with a screw rod 5, one end of the screw rod 5 is rotatably connected to a support plate 12, the support plate 12 is fixed on the top surface of the groove body 1, and the other end is drivingly connected to a driving motor 4, the driving motor 4 is horizontally fixed on the top surface of the groove body 1, the bottom surface of the frame 7 is connected with a hollow shaft 15 in a lifting manner, a sponge sleeve 11 is fixedly sleeved on the outer part of the hollow shaft 15, a plurality of equally spaced leakage holes 16 are radially penetrated through the outer part of the hollow shaft 15, dark pigment is filled in the hollow shaft 15, a negative pressure member is arranged directly below the hollow shaft 15, the negative pressure member is arranged in the groove body 1, the outer side of the groove body 1 is fixedly connected with a controller 3, two mirror-symmetrical pressure sensors 14 are vertically embedded in the top wall of the frame 7, both pressure sensors 14 are electrically connected to the controller 3, the controller 3 is electrically connected to the negative pressure member, the end of each pressure sensor 14 is respectively in contact with a lifting motor 9, the lifting motor 9 is vertically fixed on the top wall of the frame 7, the output end of each lifting motor 9 is respectively drivingly connected with a guide rod 10, the ends of the two guide rods 10 are jointly fixed with a U-shaped plate 8, the hollow shaft 15 is rotatably connected in the U-shaped plate 8, the negative pressure member includes a leakage plate 2 fixedly connected in the groove body 1, an air pump 13 is horizontally embedded in the rear side of the groove body 1, the air pump 13 is communicated with the inside of the groove body 1 through an air pipe, and the air pump 13 is electrically connected to the controller 3.

[0020] By movably connecting the frame 7 to the top surface of the groove body 1, fixing the pressure sensor 14 electrically connected to the controller 3 in the frame 7, and connecting a hollow shaft 15 in a lifting manner through the lifting motor 9 and the U-shaped plate 8 at the end of the pressure sensor 14, the flatness of the copper sheet is judged by the change of the pressure value when the hollow shaft 15 rolls on the copper sheet, and the measurement accuracy and convenience are improved without damaging the copper strip.

[0021] Working principle: During use, place the copper sheet on the leak plate 2 on the top surface of the tank body 1. Start the air pump 13 to pump the gas in the tank body 1 outwards, so that the copper sheet is fixed on the leak plate 2 by negative pressure adsorption. Then, move from one end of the frame 7 to one side end of the copper sheet. Next, the lifting motor 9 drives the U-shaped plate 8 and the hollow shaft 15 to descend, so that the hollow shaft 15 contacts the copper sheet. When the hollow shaft 15 contacts the copper sheet, the pressure sensor 14 will detect the pressure, and then the lifting motor 9 stops. At the same time, the dark pigment in the hollow shaft 15 seeps into the sponge sleeve 11 through the leakage holes 16, and the sponge sleeve 11 adsorbs the pigment. Then, the frame 7 moves. While moving, the hollow shaft 15 moves and rolls on the copper sheet. Then, by observing the numerical change of the pressure sensor 14 on the controller 3, judge in turn whether the copper sheet is flat. If the amplitude of the numerical change is large, it means that the copper sheet is not flat. After the detection is completed, the hollow shaft 15 rises, and at the same time the air pump 13 is turned off. After removing the copper sheet, observe the clarity of the color on the surface of the copper sheet to find the uneven position of the copper sheet for correction.

[0022] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used 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 described 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 flatness detection tool, comprising a slot (1), characterized in that: The top surface of the tank body (1) is movably connected to the frame (7), and the bottom surface of the frame (7) is connected to the hollow shaft (15) in a lifting manner. A negative pressure piece is provided directly below the hollow shaft (15), and the negative pressure piece is arranged in the tank body (1). The outer side of the tank body (1) is fixedly connected to the controller (3), and the controller (3) is electrically connected to the negative pressure piece.

2. The lead frame flatness detection tool according to claim 1, characterized in that: A threaded hole (6) is horizontally passed through each side of the frame (7), and a screw rod (5) is threadedly passed through each threaded hole (6). One end of the screw rod (5) is rotatably connected to a support plate (12), and the support plate (12) is fixed to the top surface of the tank body (1). The other end of the screw rod (5) is transmission-connected to a drive motor (4), and the drive motor (4) is horizontally fixed to the top surface of the tank body (1).

3. The lead frame flatness detection tool according to claim 1, characterized in that: Two mirror-symmetrical pressure sensors (14) are vertically embedded in the top wall of the frame (7), and both of the two pressure sensors (14) are electrically connected to the controller (3).

4. The lead frame flatness detection tool according to claim 3, characterized in that: The end of each pressure sensor (14) is fitted with a lifting motor (9), and the lifting motor (9) is vertically fixed to the top wall of the frame (7). The output end of each lifting motor (9) is transmission-connected to a guide rod (10), and the ends of the two guide rods (10) are jointly fixed to a U-shaped plate (8), and the hollow shaft (15) is rotatably connected inside the U-shaped plate (8).

5. The lead frame flatness detection tool according to claim 1, characterized in that: The negative pressure member comprises a leak plate (2) fixedly connected to the tank body (1); an air pump (13) is horizontally embedded on the rear side of the tank body (1); the air pump (13) is connected to the interior of the tank body (1) via an air pipe; and the air pump (13) is electrically connected to the controller (3).

6. The lead frame flatness detection tool according to claim 1, characterized in that: The outside of the hollow shaft (15) is fixedly sleeved with a sponge sleeve (11), the outside of the hollow shaft (15) is radially penetrated by a plurality of leakage holes (16) distributed at equal intervals, and the inside of the hollow shaft (15) is filled with dark pigment.

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