Monolithic Charpy Pendulum Hammer Design
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Solution Overview
Problem
Traditional Charpy pendulum hammers require precise assembly of multiple components, leading to complexity and reduced precision in impact tests on plastic materials.
Innovation Solution
A monolithic hammer design with a perimetral cutting of a plane plate forming a body with integrated arm and head, allowing for simplified fabrication and attachment to the pendulum shaft, with adjustable weights for precise energy calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional multi-component hammer design is used, then the center of gravity can be positioned at the impact point, but the assembly complexity increases and manufacturing precision is reduced
Solution Approach 1:
The patent merges the arm and head components into a single monolithic body formed by perimetral cutting of a plane plate. This eliminates the need for precise assembly between separate components while maintaining the center of gravity at the impact point, thereby resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
The hammer body is created by perimetral cutting that separates the arm and head functional zones within a single monolithic structure. This segmentation approach allows independent optimization of each zone while avoiding assembly complexity, addressing both precision and simplicity requirements.
2Ease of manufacture
If traditional multi-component hammer design is used, then the structure can be adjusted for different weights, but the fabrication process becomes more complex
Solution Approach 1:
The patent incorporates adjustable weight systems within the monolithic hammer body, allowing the center of gravity to be dynamically positioned along the arm while maintaining the integrated structure. This enables weight adaptation without requiring complex multi-component assembly, resolving the contradiction between ease of manufacture and adaptability.
3Manufacturing precision
If separate arm and head components are used, then each component can be optimized independently, but the assembly precision and time are reduced
Solution Approach 1:
By combining the arm and head into a single monolithic body through perimetral cutting, the patent eliminates assembly operations entirely. This ensures maximum alignment precision between components while completely eliminating assembly time, effectively resolving the contradiction between precision and time loss.
Data Source
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AI summary
A hammer for a Charpy pendulum, comprising a body (12) including a head (16) and an arm (14), wherein the arm (14) is equipped with a portion (22) for attachment to an end opposite to that of the head (16) and wherein the head (16) has a general C-shape, with a concave part (18) in which an area of impact is situated. The arm (14) and the head (16) of said body (12) are obtained in a monolithic form by means of perimetral cutting of a plane plate.