Press Forming Mold Rod Framework for Weight Reduction
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Solution Overview
Problem
Existing molds for press forming are not optimized for weight reduction while maintaining high strength and rigidity to withstand press loads.
Innovation Solution
The mold is designed using a framework structure composed of rod members, specifically a truss or Rahmen structure, where the design forming portion and supporting rods are configured as rod members to minimize weight and maximize load resistance, with the supporting rods extending parallel to the load direction and positioned to absorb axial thrust loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the mold is constructed with traditional solid block structure, then the strength and rigidity are sufficient to withstand press loads, but the weight of the mold becomes excessive
Solution Approach 1:
The mold is divided into multiple rod-shaped members (design forming rods and supporting rods) arranged in a framework structure, replacing the traditional solid block construction. This segmentation allows the mold to maintain sufficient strength through the distributed rod structure while significantly reducing overall weight by removing unnecessary material from non-load-bearing areas.
Solution Approach 2:
The rod-shaped members are strategically positioned to provide strength only where needed to withstand press loads, rather than uniformly reinforcing the entire mold structure. The design forming rods and supporting rods are concentrated in areas requiring load-bearing capacity, allowing weight reduction in other regions while maintaining local strength where critical.
2Weight of moving object
If the mold structure is simplified to reduce weight, then the weight decreases, but the ability to withstand high press loads diminishes
Solution Approach 1:
The supporting rods are pre-positioned and configured in the framework structure to specifically counteract the high press loads before they are applied during the forming process. This preliminary structural arrangement ensures that when loads are applied, the rod members are already optimally positioned to resist them, maintaining load resistance despite the reduced overall structure.
Solution Approach 2:
The mold employs a composite framework structure combining design forming rods and supporting rods made from materials selected for their high strength-to-weight ratio. This composite rod structure provides sufficient load-bearing capacity while minimizing weight, as each rod member is optimized for its specific functional requirement.
Data Source
AI summary
A lightweight mold for press forming is presented. Molds are characterized in that design forming portions thereof, these design forming portions making contact with a workpiece at the time of press forming and thereby forming a target design on the workpiece, are constructed of rod shaped members (design forming rods). By having the design forming portions be constructed of rod shaped members, the weight of the mold is reduced. It is preferred that the molds are further provided with supporting rods which support the design forming rods, these rod members constituting a framework structure.