Lead frame cutting device and cutting method

By detecting the lead frame thickness in the lead frame slitting device and adjusting the movement speed of the cutting knife, combined with the clamping and flattening mechanism of the gland and the cutting table, the cutting speed and accuracy problems are solved, extending the service life of the cutting knife and improving product quality.

CN119282228BActive Publication Date: 2025-03-25泰州巨昌电子有限公司
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Patent Information

Application Number
CN202411806605.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-10
Publication Date
2025-03-25
Estimated Expiration
2044-12-10

AI Technical Summary

Technical Problem

During the lead frame slitting process, the feed speed of the cutting device remains unchanged, resulting in rebound when cutting a thinner lead frame, affecting the cutting accuracy; when cutting a thicker lead frame, the wear of the cutting knife is increased, reducing service life and cutting speed.

Method used

A lead frame slitting device is designed, by detecting the lead frame thickness, adjusting the position of the first motor to change the transmission ratio between the cam and the transmission wheel, so that the movement speed of the cutting knife is adjustable. At the same time, use a gland to match the cutting table to clamp and flatten the lead frame to ensure flatness.

Benefits of technology

The adjustable cutting knife speed reduces the wear of the cutting knife and extends the service life; ensures the flatness of the lead frame after cutting, improves the cutting accuracy and speed, and improves the product quality after slicing.

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Abstract

The present invention relates to the technical field of lead frame slitting devices, and in particular to a lead frame slitting device and slitting method. It includes a mounting plate, the mounting plate is fixedly connected to a cutting table, the mounting plate is fixedly connected to symmetrically distributed fixed columns, the mounting plate is provided with a winding roll, the winding roll is wound with a lead frame roll, the symmetrically distributed fixed columns are slidably connected to a cutting knife, one of the fixed columns is slidably connected to a first motor, the output shaft of the first motor is fixedly connected to a cam, the fixed column is rotatably connected to a connecting rod, and the end of the connecting rod away from the cutting knife is fixedly connected to a transmission wheel. The present invention detects the thickness of the lead frame and then adjusts the position of the first motor, changes the transmission ratio between the cam and the transmission wheel, and allows the speed of the cutting knife moving downward to be adjusted according to the thickness of the lead frame, so as to reduce the wear of the cutting knife during the cutting process.
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