Stabilizer Heat Treatment with End-Position Adjustment
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Solution Overview
Problem
Existing methods for manufacturing stabilizers using electrical heating can lead to uneven thermal expansion, causing deformation of the columnar member into a shape different from the design due to temperature differences between bent and straight portions.
Innovation Solution
A method involving a bending, quenching, and tempering process where the relative positional relationship between the end portions of the columnar member is adjusted during heating, specifically by expanding or moving the end portions apart using a controlled heating device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If electrical heating is used to quench or temper the columnar member, then the strength of the stabilizer is increased, but deformation occurs due to temperature differences between the inside and outside of the bent portion and between the straight portion and the bent portion
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the positional relationship between end portions during heating. Specifically, the distance between end portions is changed at different stages of the heating process (quenching and tempering), which modifies the thermal expansion behavior and stress distribution within the columnar member, thereby preventing deformation while maintaining strength enhancement.
Solution Approach 2:
The patent implements dynamics by making the heating conditions variable rather than static. The relative position of end portions is dynamically adjusted during the heating process - for example, moving end portions closer together during quenching and farther apart during tempering. This dynamic adjustment allows the system to adapt to changing thermal states and prevent deformation.
2Strength
If the columnar member is heated using conventional electrical heating, then the material strength is improved, but the thermal expansion difference causes the columnar member to deform into a shape different from the design shape
Solution Approach 1:
The patent applies preliminary anti-action by pre-adjusting the relative position of end portions before and during heating to counteract the expected thermal expansion effects. By changing the distance between end portions in advance and during the heating process, the system compensates for the thermal expansion differences that would otherwise cause deformation, thereby maintaining the design shape while achieving material strengthening.
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 method effectively controls deformation during heat treatment, reducing equivalent plastic strain and stabilizing the shape of the stabilizer, ensuring consistent manufacturing results.
Implementation Method 1
there is a possibility that a difference in thermal expansion due to a temperature difference between the inside and the outside of the bent portion of the columnar member and a temperature difference between the straight portion and the bent portion of the columnar member occurs
Implementation Method 2
a technique for quenching or tempering by connecting electrodes to the end portions and performing electrical heating
Data Source
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AI summary
A method for manufacturing a stabilizer according to the present invention is a method for manufacturing a stabilizer using a columnar member and includes a bending step of bending the columnar member to form the columnar member into a shape of the stabilizer, a quenching step of quenching the columnar member after the bending step, and a tempering step of tempering the columnar member after the quenching. At least one of the quenching step and the tempering step includes a step of changing a relative positional relationship between both end portions of the columnar member at a time of heating.