Lead frame feeding positioning mechanism
By using a combination of fixed L-shaped positioning blocks, movable L-shaped positioning blocks, movable positioning bolts and positioning columns in the feeding mechanism of the chip loading machine, the problem of lack of fixed reference surfaces and low positioning accuracy of the traditional feeding mechanism is solved, and efficient and accurate lead frame positioning and production efficiency are improved.
Patent Information
- Application Number
- CN202421781971.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The feeding mechanism of traditional chip loaders lacks a fixed reference surface, which leads to the lead frame being easily deviated when loading, and the positioning rod is troublesome to adjust, affecting positioning accuracy and production efficiency.
A lead frame feeding positioning mechanism is designed, adopting a fixed L-shaped positioning block and a movable movable L-shaped positioning block. Combining movable positioning bolts and positioning columns, it provides a fixed reference surface and flexible adjustment method to adapt to lead frames of different sizes.
By providing a fixed reference surface and flexible adjustment method, the positioning accuracy and production efficiency of the lead frame are improved, manual adjustment time is reduced, and the incidence of lead frame adsorption and drop is reduced.
Smart Images
Figure CN222953066U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chip loading machine feeding, in particular to a lead frame feeding and positioning mechanism. Background Art
[0002] Chip mounters are widely used in the semiconductor industry. When feeding the lead frame, the operator needs to manually add the lead frame to the feeding mechanism of the chip mounter. There is no fixed reference surface on the traditional feeding mechanism, which is easy to cause deviation when adding. Therefore, multiple positioning threaded holes are opened on the lead frame tray, and then multiple positioning rods are screwed into the positioning threaded holes for positioning. The most common method is the 5-point positioning method. When the size of the lead frame changes, it is necessary to adjust the position of multiple positioning rods as needed. The adjustment is troublesome, and there is no fixed reference surface, which affects the positioning accuracy and overall loading efficiency. Summary of the invention
[0003] In order to solve the above technical problems, the utility model provides a lead frame feeding and positioning mechanism, which can conveniently realize positioning adjustment and improve positioning accuracy and production efficiency.
[0004] The technical solution is as follows: a lead frame feeding and positioning mechanism, which includes a lead frame tray, characterized in that a fixed L-shaped positioning block is provided on one side of the front end of the lead frame tray, and a movable L-shaped positioning block that can be moved laterally is provided on the other side, and the lead frame tray is also provided with two vertical through grooves arranged side by side and spaced apart, and two movable positioning bolts are provided through the vertical through grooves, and the threaded section of the positioning bolts passes through the vertical through grooves upward and is threadedly connected to a positioning column.
[0005] It is further characterized in that a transverse through groove is provided on the lead frame tray at the movable L-shaped positioning block, a locking block is provided on the outer side of the movable L-shaped positioning block, a locking bolt passing through the transverse through groove is provided on the locking block, and a locking nut is provided on the locking bolt;
[0006] The bolt head of the positioning bolt is fixed to a movable plate arranged on the back of the lead frame tray, and both sides of the movable plate are slidably connected to the guide rails installed on the back of the lead frame tray. A screw nut is arranged in the middle of the movable plate and connected to the screw, and an adjustment head is arranged at one end of the screw;
[0007] The lead frame tray is provided with positioning grooves which cooperate with the fixed L-shaped positioning block and the movable L-shaped positioning block.
[0008] After adopting the utility model, a fixed L-shaped positioning block and a movable L-shaped positioning block are set to replace the positioning rod, so that the positioning of two right angles on the same side can be realized, and a fixed reference surface is provided to improve the accuracy. The movable L-shaped positioning block can be moved to adjust to adapt to different lengths, and the other side uses a movable positioning column to adapt to different widths and realize the positioning of the other side. The positioning adjustment can be conveniently realized according to different lead frame sizes, thereby improving the production efficiency. Furthermore, the adjustment of the positioning column only needs to be realized by screwing the adjustment head on the screw rod, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is a front plan view of the structure of the utility model;
[0010] Figure 2 It is a bottom view of the back of the structure of the utility model. DETAILED DESCRIPTION
[0011] See Figure 1 , Figure 2 As shown, a lead frame feeding and positioning mechanism comprises a lead frame tray 1, a fixed L-shaped positioning block 2 is arranged on one side of the front end of the lead frame tray 1, and a movable L-shaped positioning block 3 which can be moved laterally is arranged on the other side, and two vertical through grooves 4 arranged side by side and spaced apart are also provided on the lead frame tray 1, and two movable positioning bolts 5 are penetrated through the vertical through grooves 4, and the threaded section of the positioning bolt 5 penetrates the vertical through groove 4 upward and is threadedly connected with a positioning column 6, and a threaded blind hole is provided at the bottom of the positioning column 6 to cooperate with the positioning bolt 5, and the top of the positioning column 6 is an arc head.
[0012] A transverse through groove 7 is provided on the lead frame tray 1 located at the movable L-shaped positioning block 3, and a locking block 8 is provided on the outer side of the movable L-shaped positioning block 3. A locking bolt 9 passing through the transverse through groove 7 is provided on the locking block 8, and a locking nut 10 is provided on the locking bolt 9. By loosening the locking nut 10, the movable L-shaped positioning block 3 can be laterally moved to adjust the distance from the fixed L-shaped positioning block 2 to meet the needs of lead frames of different lengths.
[0013] The bolt head of the positioning bolt 5 is fixed to a movable plate 11 disposed on the back of the lead frame tray 1. Generally, two through holes are opened on the movable plate, and the bolt head of the positioning bolt 5 is inserted and welded. The two sides of the movable plate 11 are slidably connected to the guide rails 12 installed on the back of the lead frame tray 1. A screw nut is arranged in the middle of the movable plate 11 and is connected to a screw 13. An adjusting head 14 is arranged at one end of the screw 13, which generally adopts a hexagonal head to facilitate rotation adjustment. When the screw 13 is screwed, the movable plate 11 moves and moves with the positioning column 6 to meet the needs of lead frames of different widths.
[0014] The lead frame tray 1 is provided with a positioning groove 15 which cooperates with the fixed L-shaped positioning block 2 and the movable L-shaped positioning block 3. The fixed L-shaped positioning block 2 is fixed from the side by a screw 16, and the front end of the bottom of the movable L-shaped positioning block 3 is inserted into the positioning groove 15 to achieve guided positioning.
[0015] The movable L-shaped positioning block 3 and the positioning column 6 in the present application can be easily moved and adjusted to meet the positioning requirements of lead frames of different specifications and sizes. 17 in the figure is a support column installed at the bottom of the lead frame tray 1, which is used to improve the stability of the product, and the height can be consistent with the thickness of the guide rail 12, so as to achieve a multi-point support effect.
[0016] After using the present application, the positioning accuracy of the lead frame is greatly improved, and it can be accurately adsorbed. The incidence of failure to absorb and falling is reduced from the previous maximum of 20% to the current 0%, and the manual adjustment time is effectively reduced.
Claims
1. A lead frame feeding and positioning mechanism, comprising a lead frame tray, characterized in that: A fixed L-shaped positioning block is provided on one side of the front end of the lead frame tray, and a movable L-shaped positioning block that can be moved laterally is provided on the other side. The lead frame tray is also provided with two vertical through grooves arranged side by side and spaced apart. Two movable positioning bolts are provided through the vertical through grooves, and the threaded section of the positioning bolts passes through the vertical through grooves upward and is threadedly connected to a positioning column.
2. A lead frame feeding and positioning mechanism according to claim 1, characterized in that: A transverse through groove is provided on the lead frame tray at the movable L-shaped positioning block, a locking block is provided on the outer side of the movable L-shaped positioning block, a locking bolt passing through the transverse through groove is provided on the locking block, and a locking nut is provided on the locking bolt.
3. A lead frame feeding and positioning mechanism according to claim 1, characterized in that: The bolt head of the positioning bolt is fixed to a movable plate arranged on the back of the lead frame tray, and both sides of the movable plate are slidably connected to guide rails installed on the back of the lead frame tray. A screw nut is arranged in the middle of the movable plate and is connected to a screw, and an adjustment head is arranged at one end of the screw.
4. A lead frame feeding and positioning mechanism according to claim 1, characterized in that: The lead frame tray is provided with positioning grooves which cooperate with the fixed L-shaped positioning block and the movable L-shaped positioning block.