铝型材散热型挤压工艺与模具

铝型材散热型挤压工艺与模具

摘要

铝合金因质轻、美观、良好的导热性和易加工成复杂的形状,而被广泛地用于生产散热器材。铝合金散热器型材主要有三种类型:扁宽形,梳子形或鱼刺形；圆形或椭圆形以及树枝形。与其他铝型材比，散热器有其自身的特点：散热片之间距离短,相邻两散热片之间形成一个槽形,其深宽比很大；壁厚差大,散热片的齿部很薄,而其根部的底板厚度大。散热器复杂的截面形状给模具设计、制造和生产带来很大的难度。

本文以两种常用散热器为实例，在总结大量散热器模具设计制造经验的基础上，论述了散热片挤压模具设计的步骤和关键点。散热器型材挤压模具设计既要保证模具有足够的强度又要平衡金属在模具中的流速。根据散热器的产品图，将梳子型散热器挤压模具设计成平摸，与导流模配合使用。把太阳花散热器挤压模具设计成分假流模，以保证在挤压时的金属流动比平模更均匀，这也是太阳花散热器模具设计的关键点。文中选用4Cr5MoSiV1模具钢作为模具材料，讨论了散热器挤压模具的热处理工艺和散热器的挤压工艺特点。

关键词：散热器挤压模具设计挤压工艺铝型材

Extrusion Process and Die Design for Radiator Aluminum Extruded Sections

ABSTRACT

Aluminum alloy, for its light weight, beautiful, good thermal conductivity and easy processing into complex shapes,is widely used to produce cooling equipment. Aluminum radiator profiles are mainly three typesg: flat wide shape, or a fishbone-shaped comb-shaped; round or oval-shaped;and branching shape. Compared with the other aluminum extruded sections radiator has its own characteristics: the distance between the heat sink is short, between two adjacent heat sink to form a trough, and its large aspect ratio; differential wall thickness, heat sink teeth thin, and its roots in the bottom thick. The mold design, manufacturing and production are very difficulty for the complexity of the shape of radiator extruded sections.

In this paper, the extruded die design of two common heat sink radiators are discussed in detail on the basis of a lot of experiences in mold design and manufacture for the radiator. Extruded die design has two key parts,the first is sufficient strength to ensure that mold; the second is to balance the flow of metal in the mold. Based on the Product plans of radiators, the radiator comb flat extrusion die are designed to touch, used in conjunction with the diversion mode. The extrusion die is designed radiator sunflowers streaming mode, split mode when the metal flow in the extrusion die is more complex than flat, so how to balance the flow rate of the metal mold is key points for the design of radiator sunflowers. 4Cr5MoSiV1 die steel is used and also the radiator heat treatment process and extruded process are discussed.

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Keywords:Radiator Extrude mold design Extrusion process Aluminum extruded sections

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目录

摘要.......................................................... I

Extrusion Process and Die Design for Radiator Aluminum Extruded Sections ..................................................... II

ABSTRACT ..................................................... II 第一章绪论.. (1)

1.1引言 (1)

1.2挤压模具在铝型材挤压生产中的重要性 (1)

1.3铝型材挤压模具技术发展概况 (3)

1.4论文的主要研究内容 (5)

第二章型材挤压模具设计技术 (6)

2.1型材模具的设计原则及步骤 (6)

2.1.1挤压模具设计时应考虑的因素 (6)

2.1.2模具设计的原则与步骤 (6)

2.1.3模具设计的技术条件及基本要求 (9)

2.2挤压模典型结构要素的设计 (9)

2.2.1模角 (9)

2.2.2定径带长度和直径 (10)

2.2.3出口直径或出口喇叭锥 (10)

2.2.4入口圆角 (11)

2.3确定采用平面和分流模的原则 (11)

2.4平面分流组合模的特点与结构 (12)

2.4.1工作原理与特点 (12)

2.4.2分流组合模的结构 (13)

2.5模具外形尺寸的确定原则 (14)

第三章典型散热器挤压模具设计 (16)

3.1太阳花散热器的模具设计 (16)

3.1.1太阳花散热器产品结构分析 (16)

3.1.2太阳花散热器挤压模具整体结构设计方案 (17)

3.1.3太阳花散热器分流组合模结构设计 (18)

3.2梳子型散热器模具设计 (30)

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