Lead frame discharging limiting mechanism
By using the limiting mechanism of the guide rod and the limiting plate during the lead frame forming process, the problems of upswing and splashing of the slitting section are solved, and a more stable discharge process and higher cutting quality are achieved.
Patent Information
- Application Number
- CN202323443548.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-18
AI Technical Summary
During the molding process of existing lead frames, the slitting sections are prone to tilt and splash when discharged, affecting the cutting quality.
Design a feeding limiting mechanism, including a guide rod and a limiting plate, the guide rod contacts the bottom surface of the lead frame, and the limiting plate contacts the top surface, limit the front end through the limit block to avoid upturning and splashing, and Adapt to different slitting lengths by adjusting the position of the guide rod and the limit block.
It effectively avoids upturning and splashing during slitting, ensures cutting quality, and allows the cut parts to fall naturally without affecting the discharge process.
Smart Images
Figure CN222153686U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lead frame preparation, in particular to a lead frame discharging limiting mechanism. Background Art
[0002] The lead frame is generally formed by punching the copper strip multiple times and cutting it. In order to improve the production efficiency, the prior art generally performs multiple punchings in the conveying direction in sequence, and after the last punching, the upper and lower molds are used to cut the formed sections into predetermined lengths, such as Figure 1 As shown, the lead frame 10 continuously fed along the conveying direction completes the forming and stamping after passing through the upper die 11 and the lower die 12. The front end of the lower die 12 is generally provided with an inclined discharge platform 13, which is convenient for discharging the formed sections cut by the stroke of the upper die 11. In this way, since the section to be cut is suspended above the inclined discharge platform 13, at the moment of cutting, the section is slightly warped on the one hand, specifically, the extended section is tilted upward, which affects the cutting quality of the cutting part; on the other hand, this section is easy to splash out forward or obliquely upward with the cutting under the action of rapid stamping, so there will be "excessive" bumps when the inclined discharge platform 13 receives it, affecting the quality of the frame. Utility Model Content
[0003] In view of the above-mentioned deficiencies in the related prior art, the utility model provides a lead frame discharging limiting mechanism, which limits the forming section of the lead frame to avoid upward tilting during cutting and to avoid splashing as much as possible.
[0004] In order to achieve the purpose of this utility model, the following scheme is proposed:
[0005] A lead frame discharge limiting mechanism is arranged at the front end of a lead frame stamping die along the conveying direction, and an inclined discharge platform is arranged at the front end of a platform where a lower die of the die is located, characterized in that the limiting mechanism comprises:
[0006] A guide rod disposed above the inclined discharge platform and in contact with the bottom surface of the lead frame carried by the lower die, the guide rod being movable along the conveying direction and used for adjusting the position in contact with the bottom surface of the lead frame; and
[0007] A limiting plate is arranged above the inclined discharging platform and in contact with the top surface of the lead frame, and a limiting block is arranged on the bottom surface of the limiting plate for movement along the conveying direction, so as to limit the front end of the lead frame.
[0008] The beneficial effects of the utility model are:
[0009] 1. The lead frame forming section is limited by guide rods, limit plates and limit blocks to avoid upward tilt during slitting and avoid splashing as much as possible, while not affecting the unloading after slitting. By setting the position of the guide rods, the lead frame cut off after slitting can naturally tilt and fall to the inclined unloading table;
[0010] 2. The position of the guide rod and the limit block can be adjusted to meet different slitting length requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 A schematic diagram of the structure of a lead frame stamping die in the prior art is shown.
[0012] Figure 2 A three-dimensional diagram of the limiting mechanism of an embodiment of the present application is shown.
[0013] Figure 3 A partial stereoscopic view of a limit block and a horizontal slide groove according to an embodiment of the present application is shown.
[0014] Figure 4 A partial stereoscopic view of a fixing plate and a guide slot according to an embodiment of the present application is shown. DETAILED DESCRIPTION
[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.
[0016] The present application embodiment provides a lead frame discharging limiting mechanism, such as Figure 2-Figure 4 As shown, a lead frame stamping mold is arranged at the front end along the conveying direction. The mold includes a lower mold 12 and an upper mold 11 above the lower mold 12. Along the conveying direction, an inclined discharge platform 13 is provided at the front end of the table where the lower mold 12 is located. The limiting mechanism of this example includes a guide rod 2 and a limiting plate 3.
[0017] Among them, the guide rod 2 is arranged above the inclined discharge platform 13 and contacts the bottom surface of the lead frame 10 carried on the lower mold 12, the limit plate 3 is arranged above the inclined discharge platform 13 and contacts the top surface of the lead frame 10, and the bottom surface of the limit plate 3 is moved along the conveying direction to set a limit block 31 for limiting the front end of the lead frame 10.
[0018] The forming section of the lead frame 10 is supported and limited by the guide rod 2. Specifically, the guide rod 2 can be set at a position of the forming section close to the mold, so that after the slitting is completed, it can form a natural tilt and fall with one side heavy; and the lead frame is upper-limited by the limit plate 3, and the forming section is end-limited by the limit block 31. Specifically, the position of the limit block 31 can be adjusted according to the extended length of the forming section. The above-mentioned limitation does not affect the original stamping and slitting operations, so that when slitting, the limit plate 3 can avoid the situation of warping and tilting, which is helpful for the quality control of the cutting part. At the same time, at the moment of cutting, the limit block 31 can cooperate with the limit plate 3 to avoid the cut forming section from splashing, and under the action of the guide rod 2, the lead frame 10 will naturally fall slowly to the inclined discharge table 13 with the front end tilted downward under the action of its own gravity.
[0019] In order to facilitate the adaptation of different slitting lengths, the guide rod 2 is set to be adjustable along the conveying direction. Specifically, a fixed plate 4 can be provided on one side of the inclined discharge table 13, and a guide slot 40 along the conveying direction can be provided on the fixed plate 4. The guide rod 2 is inserted into the guide slot 40, so that the guide rod 2 can be moved in the guide slot 40. After the specific position is determined, the current position of the guide rod 2 is fixed by fastening. In order to facilitate the movement of the guide rod 2 and put it in place, the guide rod 2 can be connected to the movable end of the first horizontal cylinder 41 through the connecting frame 42. The first horizontal cylinder 41 is provided on the fixed plate 4, so that the position of the guide rod 2 can be adjusted by the operation of the movable end of the first horizontal cylinder 41.
[0020] Specifically, the movement of the limit block 31 can be achieved through a horizontal slide groove 30 provided on the limit plate 3 along the conveying direction, and the limit block 31 is matched in the horizontal slide groove 30. Preferably, in order to facilitate the position adjustment of the limit block 31, a guide column 32 is provided on the limit block 31, and the guide column 32 is connected to the movable end of the second horizontal cylinder 33, and the second horizontal cylinder 33 is provided on the limit plate 3. The limit block 31 can be adjusted by the operation of the movable end of the second horizontal cylinder 33.
[0021] Specifically, during actual implementation, the limiting plate 3 can be connected to the fixing plate 4 to facilitate the construction of the limiting mechanism of this example.
[0022] The above are only preferred embodiments of the present invention, and are not intended to be the only or limiting embodiments of the present invention. Those skilled in the art should understand that various changes or equivalent replacements made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.
Claims
1. A lead frame discharge limiting mechanism, arranged at the front end of a lead frame stamping die along the conveying direction, wherein the front end of the platform where the lower die (12) of the die is located is provided with an inclined discharge platform (13), characterized in that: The limiting mechanism includes: A guide rod (2) disposed above the inclined discharge platform (13) and in contact with the bottom surface of the lead frame (10) carried by the lower mold (12); and A limiting plate (3) is arranged above the inclined discharging platform (13) and in contact with the top surface of the lead frame (10), and a limiting block (31) is arranged on the bottom surface of the limiting plate (3) to move along the conveying direction, so as to limit the front end of the lead frame (10).
2. The lead frame discharging and limiting mechanism according to claim 1, characterized in that: The guide rod (2) is arranged to move along the conveying direction.
3. The lead frame discharging and limiting mechanism according to claim 2, characterized in that: A fixed plate (4) is provided on one side of the inclined discharge platform (13), a guide slot (40) along the conveying direction is provided on the fixed plate (4), and the guide rod (2) is inserted into the guide slot (40).
4. The lead frame discharging and limiting mechanism according to claim 3, characterized in that: The guide rod (2) is connected to the movable end of the first horizontal cylinder (41) via a connecting frame (42), and the first horizontal cylinder (41) is arranged on the fixed plate (4).
5. The lead frame discharging and limiting mechanism according to claim 1, characterized in that: The limit plate (3) is provided with a horizontal slide groove (30) along the conveying direction, the limit block (31) is matched with the horizontal slide groove (30), the limit block (31) is provided with a guide column (32), the guide column (32) is connected to the movable end of the second horizontal cylinder (33), and the second horizontal cylinder (33) is arranged on the limit plate (3).