行业组件数据 · 2026

拉筋

Lacings are structural cross-bracing components in lattice booms that provide diagonal reinforcement to resist buckling and torsional loads.

技术定义与适配语境
典型 拉筋 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

Lacings are diagonal or cross-shaped structural members in lattice boom construction that connect main chords to form triangular truss patterns. They transfer shear forces between chords, increase moment of inertia, and prevent local/global buckling under compressive and bending loads. Critical for maintaining geometric stability and load distribution in telescoping or fixed lattice sections.

组件规格

定义
Lacings are diagonal or cross-shaped structural members in lattice boom construction that connect main chords to form triangular truss patterns. They transfer shear forces between chords, increase moment of inertia, and prevent local/global buckling under compressive and bending loads. Critical for maintaining geometric stability and load distribution in telescoping or fixed lattice sections.
工作原理
Lacings work by creating triangulated truss structures that convert applied loads (compression, tension, bending) into axial forces along their length. They distribute stresses evenly across the boom cross-section, reduce unsupported chord length (slenderness ratio), and enhance torsional rigidity through geometric bracing patterns (single lacing, double lacing, or K-bracing).
材料
High-strength low-alloy steel (HSLA) ASTM A572 Grade 50 or equivalentyield strength ≥345 MPatensile strength ≥450 MPa. Corrosion-resistant coatings: hot-dip galvanizing (ISO 1461) or epoxy paint (ISO 12944).
Pattern
Single diagonal, double diagonal, or K-type
Connection
Bolted (grade 8.8 bolts) or welded (fillet welds per AWS D1.1)
Cross-section
Round bar, flat bar, or angle iron
Spacing Ratio
L/r ≤ 200 per ASME B30.5
Diameter/Thickness
10-50 mm typical
标准
ISO 4301-1DIN 15018FEM 1.001

行业分类与别名

拉筋 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

Cyclic loading and stress concentration at bolted/welded joints->Fatigue crack propagation leading to lacing fracture->Regular NDT inspections (ultrasonic testing), use of fatigue-resistant details (rounded edges), and proper preload in bolted connections
Exposure to corrosive environments (marine, industrial)->Section loss reducing load-bearing capacity->Apply protective coatings (galvanizing, epoxy), implement corrosion monitoring, and schedule preventive maintenance
Design error (excessive slenderness ratio L/r)->Elastic buckling under compressive loads->Follow ASME B30.5 spacing rules, use double lacings for long spans, and validate with FEA analysis

工业生态与工程逻辑

0
Fatigue cracking at connection points
1
Corrosion-induced section loss
2
Buckling due to improper slenderness ratio
3
Overload causing permanent deformation

合规与检测

tolerance
Length tolerance ±2 mm per 1000 mm; straightness tolerance ≤1/1000 of length
test method
Load testing per ISO 4301 (1.25x rated load), ultrasonic testing for weld integrity, hardness testing per ISO 6506

制造该组件的工厂

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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 lacings in a lattice boom?

Lacings provide diagonal reinforcement to form stable triangular truss patterns, transferring shear forces between main chords and preventing buckling under compressive and bending loads.

How are lacings typically connected in lattice booms?

They are connected via bolted joints (using high-strength bolts) or welded fillet joints, following standards like AWS D1.1 for welding or ISO 898-1 for bolting.

What materials are used for manufacturing lacings?

High-strength low-alloy steel (e.g., ASTM A572 Grade 50) with corrosion protection like hot-dip galvanizing or epoxy coatings, ensuring durability under outdoor and heavy-load conditions.

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CNFX Industrial Component Index · 机械和设备制造

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URN:CNFX:ME:UNIT:LACINGS