Integrated Side Mould Thermal Deformation Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Integrated side moulds in low-pressure aluminum alloy wheel casting experience thermal deformation and distortion, leading to precision issues, parting-line flashes, adhesion, and reduced service life, making it difficult to maintain dimensional accuracy and increase metal utilization.
Innovation Solution
The integration of thermal deformation circular arc compensation surfaces on the 45-degree matching surfaces of the side moulds, forming V-shaped gaps to accommodate thermal expansion and reduce stress, ensuring precise matching and extended mould life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If integrated side moulds are used in low-pressure casting, then assembly simplicity and cost are improved, but thermal deformation and distortion occur leading to precision deterioration
Solution Approach 1:
The patent applies preliminary action by pre-calculating and pre-forming compensation surfaces on the mould before casting. The compensation surfaces are designed with specific curvature radii (R1, R2, R3, R4) and positions that anticipate the thermal deformation that will occur during casting, allowing the mould to maintain dimensional accuracy without requiring complex real-time adjustments.
Solution Approach 2:
The patent changes the geometric parameters of the mould surfaces by introducing compensation surfaces with specific curvature radii (R1=50-100mm, R2=30-60mm, R3=40-80mm, R4=20-40mm) at strategically positioned locations. These parameter changes allow the mould to compensate for thermal expansion and contraction during the casting process, maintaining precision while keeping the integrated design simple.
2Ease of manufacture
If integrated side moulds are used in low-pressure casting, then production cost is reduced, but service life is shortened due to local wear
Solution Approach 1:
The patent applies preliminary action by pre-forming compensation surfaces that anticipate and accommodate thermal deformation before casting begins. This prevents premature wear and damage to the mould, extending its service life while maintaining the cost-effectiveness of the integrated design.
Solution Approach 2:
The patent converts the harmful thermal deformation into a beneficial feature by designing compensation surfaces that intentionally accommodate the expected deformation. The V-shaped gaps and curved surfaces are designed to work with the thermal expansion rather than resist it, reducing stress concentration and preventing crack initiation, thereby extending mould life.
3Manufacturing precision
If thermal deformation compensation is implemented, then dimensional accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by introducing compensation surfaces only at specific critical locations where thermal deformation occurs (at positions marked with curvature radii R1-R4). The rest of the mould maintains its simple integrated structure. This localized approach improves dimensional accuracy without unnecessarily complicating the entire mould design.
Solution Approach 2:
The patent uses curvature (spheroidality) by introducing compensated surfaces with specific curvature radii (R1=50-100mm, R2=30-60mm, R3=40-80mm, R4=20-40mm) to accommodate thermal deformation. The curved surfaces naturally guide and distribute thermal stresses, improving dimensional accuracy while maintaining a relatively simple overall mould structure that can be manufactured with standard machining operations.
4Manufacturing precision
If allowance is provided in design to overcome dimension error, then casting dimension accuracy is improved, but machining complexity and cost increase
Solution Approach 1:
The patent applies preliminary action by pre-forming compensation surfaces on the mould before casting. This eliminates the need for post-casting machining adjustments to compensate for thermal deformation. The compensation surfaces are designed to work together with the casting process to achieve dimensional accuracy directly, reducing or eliminating subsequent machining operations.
Solution Approach 2:
The patent changes the mould surface parameters by introducing compensation surfaces with specific curvature radii and positions that prevent thermal deformation from causing dimensional errors. This approach achieves casting dimension accuracy through proper mould design rather than requiring post-casting machining allowances, thereby reducing machining complexity and cost.
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
The solution effectively reduces parting-line flashes, adhesion, and extends mould service life, improving dimensional accuracy and reducing production costs by maintaining precise matching surfaces even under thermal stress.
Implementation Method 1
thermal deformation circular arc compensation surfaces... are formed by processing on upper and lower one-fourth circular arc matching surfaces of the integrated side moulds... the distance from the point (K) to an original circular arc point (C) is from 0.2 mm to 0.5 mm
Data Source
AI summary
The present invention provides an integrated mold for casting of wheels. The integrated mold has an upper mold, integrated side molds and a lower mold, wherein the number of the integrated side molds is four in the circumferential direction of the wheel mold. Thermal deformation circular arc compensation surfaces are formed by processing on an upper and lower one-fourth circular arc part of each integrated side mold, and compensation surfaces are formed by processing on key parts of 45-degree matching surfaces of the adjacent integrated side molds. The integrated side molds can effectively solve the problems such as imprecise matching of the matching surfaces, parting-line flashes of the matching surfaces and adhesion of aluminum caused by thermal deformation of the integrated side molds.