行业组件数据 · 2026

折边法兰

A hem flange is a folded edge on automotive body panels that provides structural reinforcement and facilitates assembly.

技术定义与适配语境
典型 折边法兰 会按材料、尺寸公差、适配关系和失效风险在 汽车制造 中评估。

A hem flange is a critical structural component in automotive body panels where the edge of a metal sheet is folded over onto itself or another panel, typically at 180 degrees. This folded edge creates a reinforced seam that enhances rigidity, prevents edge deformation, improves safety by distributing impact forces, and provides a clean finish for assembly with adjacent panels through welding, adhesive bonding, or mechanical fastening.

组件规格

定义
A hem flange is a critical structural component in automotive body panels where the edge of a metal sheet is folded over onto itself or another panel, typically at 180 degrees. This folded edge creates a reinforced seam that enhances rigidity, prevents edge deformation, improves safety by distributing impact forces, and provides a clean finish for assembly with adjacent panels through welding, adhesive bonding, or mechanical fastening.
工作原理
The hem flange works by folding the edge of a metal panel to create a double-layered section, increasing the moment of inertia and stiffness at the edge. This prevents buckling under load, provides a secure joining surface for adjacent panels, and seals against moisture and contaminants. The folding process typically involves flanging, pre-hemming, and final hemming stages in stamping operations.
材料
Cold-rolled steel (CRS)galvanized steelaluminum alloys (e.g.AA5xxxAA6xxx)advanced high-strength steel (AHSS)ultra-high-strength steel (UHSS). Thickness typically ranges from 0.6mm to 2.0mm depending on application and material strength.
Hem Angle
180° ± 2°
Bend Radius
1-3 mm
Flange Width
10-25 mm
Surface Finish
Ra 1.6-3.2 μm
Flatness Tolerance
±0.5 mm
标准
ISO 2768DIN 6930SAE J911VDA 238-100

行业分类与别名

折边法兰 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Insufficient material ductility or improper tool design->Edge cracking during hemming operation->Material testing for formability, optimized bend radii, controlled strain paths, and proper lubrication
Material springback variation->Dimensional inaccuracies affecting panel fit->Compensation in tool design, process monitoring, material consistency controls, and post-hem calibration
Trapped moisture in hem cavity->Corrosion leading to structural weakening->Hem sealant application, drainage design, corrosion-resistant coatings, and quality inspection

工业生态与工程逻辑

0
Edge cracking during forming
1
Springback variation
2
Corrosion at folded interface
3
Dimensional inconsistency affecting assembly
4
Surface defects from tooling wear

合规与检测

tolerance
±0.3 mm for critical dimensions, ±0.5 mm for non-critical dimensions per ISO 2768-m
test method
Coordinate measuring machine (CMM) inspection, gap and flush measurement, cross-section analysis, corrosion salt spray testing per ASTM B117

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the primary function of a hem flange in automotive body panels?

The primary functions are structural reinforcement to prevent edge deformation, providing a secure joining surface for adjacent panels, improving crash energy management, and creating a clean aesthetic finish.

What materials are commonly used for hem flanges?

Common materials include cold-rolled steel, galvanized steel for corrosion resistance, aluminum alloys for weight reduction, and advanced high-strength steels for enhanced safety performance.

How are hem flanges manufactured?

Hem flanges are typically created through progressive stamping dies that perform flanging, pre-hemming, and final hemming operations in sequence, often using robotic hemming cells for precision and consistency.

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CNFX Industrial Component Index · 汽车制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

请求制造能力信息: 折边法兰

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URN:CNFX:ME:UNIT:HEM_FLANGE