Magnetostrictive Sensor Output Block for Impact Tools
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Solution Overview
Problem
Existing impact tools face challenges in ensuring the mechanical strength of the output block to withstand the impact generated by the impact mechanism, which can lead to reduced reliability and efficiency in applications like screw tightening.
Innovation Solution
The impact tool incorporates a magnetostrictive sensor with a claw block subjected to quenching treatment and a body block with a thermally sprayed magnetostrictive material, where the claw and body blocks are separate to maintain the impact resistance of the claw block and enhance the mechanical strength of the output block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the output block is designed as a single integrated structure, then the manufacturing process is simple, but the mechanical strength and impact resistance are insufficient
Solution Approach 1:
The output block is divided into two separate blocks: the claw block (subjected to quenching treatment for high strength) and the body block (with thermally sprayed magnetostrictive material for sensing). This segmentation allows each block to be optimized for its specific function, resolving the contradiction between strength and complexity.
2Strength
If the claw block is subjected to quenching treatment to increase strength, then the impact resistance improves, but the magnetostrictive sensor cannot be applied directly to the claw block surface
Solution Approach 1:
By separating the claw block and body block, the patent enables quenching treatment on the claw block to achieve high impact resistance, while the body block serves as the substrate for thermally spraying the magnetostrictive material, thus resolving the manufacturing conflict.
Solution Approach 2:
The body block acts as an intermediary between the claw block and the magnetostrictive sensor. It provides a suitable surface for thermal spraying of the magnetostrictive material while the claw block maintains its high-strength quenching treatment, enabling both functions to coexist.
3Reliability
If the output block is designed with high mechanical strength to withstand impact, then the reliability improves, but the sensitivity of the magnetostrictive sensor may be reduced
Solution Approach 1:
The segmentation of the output block into claw block and body block allows the magnetostrictive sensor to be applied to the body block where it can detect strain effectively, while the claw block is optimized for impact resistance through quenching treatment.
Solution Approach 2:
Different regions of the output block have different properties: the claw block has high strength through quenching, while the body block has a thermally sprayed magnetostrictive layer for sensing. This local differentiation resolves the contradiction between reliability and measurement precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively increases the mechanical strength of the output block, allowing it to withstand impact operations while maintaining the sensitivity of the magnetostrictive sensor, thus enhancing the reliability and efficiency of the impact tool.
Implementation Method 1
The torque measuring unit may be, for example, a magnetostrictive strain sensor (magnetostrictive sensor) with the ability to detect torsional strain
Implementation Method 2
The magnetostrictive sensor includes a magnetostrictive member and a coil portion covering the magnetostrictive member
Implementation Method 3
The claw block has been subjected to quenching treatment
Implementation Method 4
The body block includes a thermally sprayed portion and is coupled to the claw block. The thermally sprayed portion includes, on a surface thereof, the magnetostrictive member made of a magnetostrictive material
Data Source
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AI summary
An object of the present disclosure is to provide an impact tool with a magnetostrictive sensor and increase the mechanical strength of an output block sufficiently for the output block to withstand the impact caused by an impact operation. An impact tool includes a motor, an output block (8), a hammer, and a magnetostrictive sensor. The magnetostrictive sensor includes a magnetostrictive member and a coil portion covering the magnetostrictive member. The output block (8) includes a claw block (81) and a body block (82). The claw block (81) includes an anvil claw (812), against which a hammer claw collides. The claw block (81) has been subjected to quenching treatment. The body block (82) includes a thermally sprayed portion (821) and is coupled to the claw block (81). The thermally sprayed portion (821) includes, on a surface thereof, the magnetostrictive member made of a magnetostrictive material.