scraper
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Solution Overview
Problem
Conventional scrapers lack structural strength and safety, making them prone to breakage when used on harder objects, limiting their effectiveness in scraping operations.
Innovation Solution
A scraper design featuring a blade head with a higher hardness and specific dimensions, including a cutting portion with an included angle of 40 to 75 degrees, connected to a blade body of lower hardness, with distinct thickness and width ratios to enhance durability and prevent friction and collision, along with a blunted end for stress distribution, and a grip with an anti-slip structure for comfortable handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the blade is made with high hardness to improve scraping effectiveness on harder objects, then the scraping capability is improved, but the blade becomes more prone to breakage
Solution Approach 1:
The blade is designed with different hardness values at different locations: the cutting edge portion has a first hardness (HRC 58-65) for effective scraping, while the main body has a second hardness (HRC 45-52) for strength and resistance to breakage. This gradient hardness structure allows each region to perform its specific function optimally without compromising the other.
Solution Approach 2:
The blade employs a composite structure with two distinct material zones having different hardness properties. The cutting edge uses a harder material composition for scraping effectiveness, while the main body uses a softer, more ductile material for structural integrity. This composite approach resolves the contradiction between hardness for scraping and softness for strength.
2Strength
If the blade thickness is increased to improve strength, then the structural strength is improved, but the scraping precision and ability to access narrow areas deteriorates
Solution Approach 1:
The blade thickness is optimized locally: the main body has sufficient thickness for strength, while the cutting edge portion is thinner for precision scraping and access to narrow areas. This localized thickness variation allows the blade to maintain structural integrity while performing precise scraping operations.
Data Source
AI summary
A scraper is provided, wherein the scraper includes: a blade head having a first hardness and including a cutting portion and a first main body, the cutting portion being connected to the first main body, the cutting portion including two cutting surfaces defining an included angle, the first main body having a first thickness and a first width in longitudinal and thickness directions perpendicular to each other and perpendicular to a width direction; and a blade body having a second hardness and including a second main body connected to the first main body, the second main body having a second thickness and a second width; wherein the included angle ranges from 40 to 75 degrees, and the first hardness is larger than the second hardness.