棘轮型手动压机设计【全套CAD图纸+毕业论文】【答辩优秀】

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目    录

1  引言

1 课题研究的目的和意义1

2  手动压力机的设计

2.1总体方案的确定2

2.2 齿轮的设计2

2.2.1齿轮材料及精度的选择2

2.2.2齿轮的设计计算3

2.2.3齿轮的校核4

2.2.4齿轮的几何尺寸计算7

2.3 齿轮轴的设计8

2.3.1齿轮轴材料的选择8

2.3.2确定齿轮轴的最小直径9

2.3.3齿轮轴上零件的装配方式11

2.3.4齿轮轴的校核11

2.3.5齿轮轴的零件图14

3 滚动轴承的选择14

3.1滚动轴承类型的选择14

3.2滚动轴承的配置14

3.3滚动轴承的润滑15

3.4滚动轴承的密封装置16

3.5 键的选择16

3.5.1键的尺寸型号17

3.6 棘轮机构的设计18

3.6.1棘轮的基本结构和工作原理18

3.6.2棘轮装置的优缺点18

3.6.3棘轮机构中的主要问题19

3.6.4棘轮几何尺寸的计算19

3.6.5棘轮的零件图20

3.7 手轮和手柄的设计20

3.7.1手轮和手柄的材料选择20

3.7.2手柄长度的设定20

3.7.3手柄直径的确定20

3.8 齿条的设计21

3.8.1零件的特点及材料的选择21

3.8.2齿条参数的设定21

3.8.3齿条基本尺寸的设定22

3.9 箱体的设计22

3.9.1零件的特点及材料的选择22

3.9.2箱体的结构设计22

4 箱体的工艺规程设计25

4.1设计任务26

4.2零件工艺性分析26

4.3毛胚的选择27

4.4拟订零件加工工艺路线28

4.5制定零件工艺规程29

4.6 压力机的成本核算30

4.6.1制定零件工艺规程29

4.6.2 压力机的成本核算30

5结论31

参考文献32

致谢33

棘轮型手动压机设计

摘要: 本课题是棘轮手动压力机的设计，针对机械装置工作条件，设计符合实际工作要求的压力机。压力机的设计包括齿轮轴、齿条、箱体的设计和一些零部件的选用校核等。在设计过程中，根据任务书提供的压力机的长度、宽度、高度、行程等要求，完成压力机的总体设计。其中主要以人力为主，通过齿轮带动齿条运动，用棘轮实现自锁，用手轮回复齿条，其中主要设计了各个系统传动的零部件，结构比较简单，属于典型的手动压力机

对压力机进行受力分析，完成齿轮的设计。由于压力机的机身结构紧凑，齿轮与轴连成一体，做成齿轮轴结构。在齿轮轴设计时候，完成选用轴承、拟定轴上的零件的装配方案、校核轴的强度要求等工作。完成齿轮轴结构的的设计后，就可以进一步确定与其啮合的齿条的尺寸，并设计齿条的工艺规程。齿条的工艺规程设计有两种方案，比较两种方案的优劣，选择合适的一种。轴承对压力机的工作发挥着重要的作用，应该校核其强度，设计其密封装置等。在以上各项工作完成后，可以设计压力机机身（箱体）的设计和轴承端盖的设计。最后，还应进行成本校核，成本核算的实质是一种数据信息处理加工的转换过程，即将日常已发生的各种资金的耗费，按一定方法和程序，按照已经确定的成本核算对象或使用范围进行费用的汇集和分配的过程。成本校核的目的是为了在满足机械工作要求和加工精度的基础上，设计出最经济廉价产品。

关键词: 压力机  棘轮机构  成本校核

Ratchet-type manual press design

       Abstract: This issue is to manually press ratchet design, working conditions for mechanical devices, designed to meet actual work requirements presses. Press design includes gear shaft, rack, cabinet design and some components such as the selection of check. In the design process, according to the press the mission statement to provide the length, width, height, stroke, etc., to complete the overall design of the press. Mainly to human-based, driven by gear rack movement, with the ratchet to achieve self-locking hand wheel back rack, which drive the main design components of each system, relatively simple structure, typical of the hand press

The force analysis on the press to complete the design of gears. As the compact body presses, gear and shaft fused, causing the gear shaft structure. When the gear shaft to complete the bearing selection, shaft developed parts of the assembly program, checking the work of shaft strength requirements. Completed the design of the structure of the gear shaft, you can further define the size of its meshing of rack and rack of the process design rules. Rack of process planning, there are two options, compare the pros and cons of two options, choose the right one. Bearing on the press played an important role in the work, should check its strength, the design of its sealing devices. In the above work is completed, can be designed to press frame (box) design and the design of bearing end caps. Finally, the cost should be checked, the real cost accounting information processing is a data processing conversion process about to occur daily all funds have been spent, according to certain methods and procedures have been established in accordance with the object or the use of cost accounting range costs of collection and distribution process. The purpose of the cost of checking is in order to meet the job requirements and precision machinery, based on the most economical design of cheap products.

Key words: forcing press   Ratchet institutions  check the cost