Interchangeable Spring Pack for Lead Forming Die Changeover
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Solution Overview
Problem
Existing lead forming systems for SMT electronic components require time-consuming disassembly and reassembly for changes in dimensions and lead types, limiting flexibility and precision in manufacturing.
Innovation Solution
The introduction of a spring pack in the upper die unit with removable die inserts and chamfers allows for quick changeover without complete disassembly, enabling easy modification and replacement by rotating the spring pack within the die unit until a narrower side is presented for removal, minimizing damage and improving access to cutting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lead forming system is disassembled and reassembled with different parts to produce components with different dimensions and lead types, then the system can accommodate various component specifications, but the process is time-consuming and limits flexibility
Solution Approach 1:
The upper die unit is segmented into a reusable die body and interchangeable spring packs. Each spring pack is a self-contained module that can be independently removed and replaced. This segmentation allows operators to change spring packs without disassembling the entire upper die unit, dramatically reducing setup time while maintaining the ability to produce different component specifications.
Solution Approach 2:
The spring packs are designed with dynamic interchangeability through rotational movement. The spring pack can be rotated within the die body to present different sides for removal, and the chamfered surfaces enable smooth rotational motion. This dynamic design makes the changeover process flexible and adaptable to different production requirements.
2Productivity
If the spring pack is designed for easy removal and replacement, then the changeover process is simplified and time is reduced, but the precision and accuracy of the new setup may be compromised
Solution Approach 1:
The spring pack incorporates asymmetric chamfered surfaces at specific angles (e.g., 45 degrees) that create a unique rotational orientation. These asymmetric features ensure that the spring pack can only be installed in the correct orientation, guaranteeing precise alignment and repeatable positioning. This eliminates setup errors while maintaining rapid changeover capability.
Solution Approach 2:
The chamfered surfaces are pre-configured on the spring pack and die body during manufacturing. These pre-formed guide surfaces automatically align the spring pack during insertion, eliminating the need for manual alignment or adjustment. The preliminary preparation of these geometric features ensures high precision setup is achieved automatically as part of the quick changeover process.
3Ease of operation
If the spring pack can be rotated within the upper die unit, then access to cutting units is improved and removal is easier, but the structural complexity increases
Solution Approach 1:
The spring pack incorporates rounded corners and chamfered surfaces that facilitate rotational movement within the die body. These curved and angled surfaces reduce friction and guide the spring pack smoothly during rotation. The geometric curvature features enable easy manipulation and removal without requiring complex mechanical mechanisms, maintaining structural simplicity while improving operability.
Data Source
AI summary
An improvement to a lead forming system that provides quick changeover without complete disassembly. By removing a pair of fasteners securing a pair of die inserts, a spring pack in an upper die unit can be freely rotated and interchanged or modified. The spring pack has a plurality of chamfers that allow the spring pack to rotate within the die pack until a narrower side is presented for removal. Straightforward access to the cutting units is afforded when the spring pack is removed. Risk of damage to various components of the lead forming system is minimized and the precision and accuracy of the new setup is increased because the system was minimally disassembled. A method for removing the spring pack in the upper die unit is fully disclosed.