论文总字数：13206字

毕业设计计算说明书

2016 年 3 月 12 日

前言

聚四氟乙烯在塑料中有非常明显的优势，它具有耐高温、耐腐蚀等特点，在军工、能源、电子信息产业等高端产业均战友一席之地。而聚四氟乙烯的生产也是我国现阶段所需研究与发展的重要课题，国内与国外的技术存在一定差距，我国仍然处于发展初期阶段，这将会严重影响我国的各种氟塑料制品在国内外的影响力，更加会影响相关产业的发展。但是，纯聚四氟乙烯也存在一定缺陷，因此填充聚四氟乙烯（聚四氟乙烯复合物）开始被研究发明，各类无机物，有机物、金属填充来改变聚四氟乙烯的性能。这种方法的原理是根据不同填料之间的相互作用，来提高F4的耐磨性和力学等性能。复合改性的主要方法有四种。其中混合改性是指将不同的材料与聚四氟乙烯混合，可以提高聚四氟乙烯的强度、硬度和耐磨性等性能。

聚四氟乙烯复合管是指在纯聚四氟乙烯管的外层再覆盖上另外一层复合管，在节约成本的情况下又不降低聚四氟乙烯的使用效果（包括防腐性、强度）。聚四氟乙烯复合管的成型方法有模压成型、包覆成型、推压成型等。用于聚四氟乙烯的填料，必须经过400℃以上的高温烘烤，有利于在烧结时性能不会改变；而且能和聚四氟乙烯混匀。其中无机填料、金属及金属氧化物和有机填料等是聚四氟乙烯的常用填料。石墨与适量的硬质填料对聚四氟乙烯的改性比较合理，不但可以降低聚四氟乙烯的磨损量，而且还提高了原纯聚四氟乙烯的耐冲击强度。经研究发现当聚四氟乙烯和石墨与玻纤的质量比分别为85%、10%、5%时，聚四氟乙烯的复合效果比较好。

目前，对于聚四氟乙烯复合材料烧结工艺的研究比较常见，但整套的生产纯四氟及填充材料混合的复合管装备还比较少见，本文较为系统的分析了整套生产装备中的各传动机构功能、构造以及组合运转的机理。

Perface

PTFE in the plastic has a very obvious advantage, it has high temperature resistance, corrosion resistance and other characteristics, in the military, energy, electronic information industry and other high-end industries are in a place. The PTFE production also is our country present stage required an important subject in the research and development, domestic and foreign technical existence certain disparity, our country is still in the early stages of development, which will seriously affected our country fluorine plastic products in domestic and foreign influence, more will affect the development of related industries. Pure PTFE, but also has some defects, so filled polytetrafluoroethylene (PTFE) began was invented, all kinds of inorganic compounds, organic compounds, metal filling to change the properties of PTFE. The principle of this method is to improve the wear resistance and mechanical properties of F4 according to the interaction between different fillers. The main methods of compound modification include: surface modification, filling modification, blending modification and so on. Mixing different materials with PTFE can improve the strength, hardness and wear resistance of PTFE.

PTFE composite pipe is refers to the outer layers of the PTFE tube to cover another layer of composite pipe, in cost savings and does not reduce the effect of the use of PTFE (including corrosion resistance and strength. The molding method of PTFE composite pipe is molding, coating, pressing and pressing, etc.. For PTFE packing, must pass through 400 degrees above the high temperature baking, is conducive to the sintering performance will not change; and can be mixed with ptfe. Inorganic filler, metal and metal oxide, nano particle and organic filler are commonly used as fillers. Graphite and the amount of hard filler of PTFE modified more reasonable, not only can reduce the PTFE wear, but also improve the impact strength resistance of pure PTFE. The results showed that the composite effect of PTFE and graphite was 85%, 5% and 10%, respectively, when the mass ratio of PTFE and graphite was and, respectively.

At present, for research on sintering technology of PTFE composite is more common, but set the production of pure PTFE and filler mixed material of composite pipe equipment is still relatively rare. In this paper, a more system analysis the a complete set of production equipment in the transmission function, structure and operation mechanism.

目录

前言-----------------------------------------------------------Ⅰ

Perface--------------------------------------------------------Ⅱ

1. 产品名称与原始数据------------------------------------------1
2. 设计计算中的相关数据----------------------------------------2

三、工艺流程----------------------------------------------------4

四、模具设计----------------------------------------------------5

1.分层填料段模具设计计算--------------------------------------5

2.预成型段模具设计计算----------------------------------------5

3.定型模具段设计计算------------------------------------------6

4.结晶段模具设计计算------------------------------------------6

5.烧结段模具设计计算------------------------------------------6

6.芯摸设计计算------------------------------------------------6

7.模具材料选择------------------------------------------------7

五、液压系统设计------------------------------------------------8

1.各零部件设计------------------------------------------------8

1.1缸筒设计-------------------------------------------------8

1.2法兰设计------------------------------------------------16

1.3活塞设计------------------------------------------------18

1.4活塞杆设计----------------------------------------------20

1.5缓冲装置------------------------------------------------22

2.液压回路设计选用-------------------------------------------22

3.液压缸行程-------------------------------------------------23

4.液压泵的选用-----------------------------------------------23

5.电动机的选用-----------------------------------------------25

六、机架设计---------------------------------------------------27

结束语---------------------------------------------------------30

参考文献-------------------------------------------------------31

致谢-----------------------------------------------------------33

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