摘要表面粗糙度值是衡量零件表面质量好坏的重要指标之一。产品性能的优劣在 极大程度上都取决于零件的表面质量。在机械产品的切削加工中，刀具类型、切 削用量、加工方式、工件硬度等在很大程度上均影响着零件表面粗糙度值。所以， 表面粗糙度值的大小在机械产品的生产中扮演着很重要的角色。73869

本文主要根据磨损寿命理论，论证分析粗糙度的影响因素，并对给定试件进 行运转实验，验证理论结果，然后寻求指定工况下的粗糙度最优值。对于实验， 首先建立详细的实验方案，搭建实验系统，然后根据实验条件对试件进行预处理， 再根据实验方案熟练运用测试设备完成测试实验。最后对实验数据进行整理分 析，并加以理论说明。当工况一定时，我们尽量选择既能满足零件表面的功能要 求，又相对经济的表面粗糙度值。经常性产生摩擦的表面，比无摩擦的表面粗糙 度值小；发生滚动摩擦的表面比发生滑动摩擦的表面粗糙度值小。

毕业论文关键词：粗糙度 影响因素 最优值

The main factors affecting the optimal roughness and the optimal value under the condition of determination

Abstract Surface roughness value can be very intuitive to measure the quality of parts surface。 The quality of the product is largely determined by the surface quality of the parts。 In the machining process of mechanical products, the type of tool, the amount of cutting, the way of machining and the hardness of the workpiece all affect the value of the surface roughness。 Therefore, the size of the surface roughness value plays a very important role in the production of mechanical products。

In this paper, based on the theory of wear life, this paper demonstrates the influence factors of the roughness, and makes a running experiment on a given test piece, verifies the theoretical results, and then seeks the optimal value of  the roughness of the specified conditions。 For the experiment, we first establish a detailed experimental program, set up the experimental system, and then according to the experimental conditions for the pretreatment, and then according to the experimental plan skilled use of test equipment to complete the test experiment。 Finally, the experimental data are analyzed, and it becomes more intuitive, and then  the theoretical description。 When working conditions are certain, we try to choose not only to meet the functional requirements of parts surface, but also the relative economic value of the surface roughness。 The surface roughness value is smaller than the friction free surface, and the surface of the rolling friction is smaller than the surface roughness value of the sliding friction。

Key Words: roughness influence factors optimal value

目 录

摘要Ⅳ

AbstractⅤ

目录Ⅵ

图清单Ⅷ

表清单Ⅷ

变量注释表Ⅷ

1 绪论 1

1。1 表面粗糙度的概述 1

1。2 表面粗糙度研究的目的和意义 1

1。3 表面粗糙度的国内外研究现状 1

2 表面粗糙度的理论概述 2

2。1 表面粗糙度的形成机理 3

2。2 表面粗糙度的标准 3

3 影响表面粗糙度的主要因素及控制措施 5

3。1 影响表面粗糙度的主要因素