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时间：2021-01-01 11:57:06 报告范文我要投稿

读书报告1200字范文

　　篇一：

读书报告1200字范文

　　我国13号车钩的强度现状与发展趋势

　　本文主要讲述了我国车钩的发展历史，现行主要车钩13号车钩的强度现状及其与美国车钩的对比，未来发展趋势。

　　本文列举了普通钢、C级钢、E级钢3种13号车钩的强度现状，并与美国同种车钩进行了强度比较，我国13号车钩强度明显高于美国同种车钩。C 级钢 13 号车钩 3 000 kN 的破坏强度,完全能满足我国目前和今后较长时期的货运要求。所以, 今后对 13 号车钩强度的研究工作, 不必再刻意追求静拉破坏强度的提高；同时需要控制与规范生产厂家，提高车钩制造质量，消除产品质量参差不齐的现象；提高车钩材料品质, 尽快普及淬火、回火热处理的 C 级钢 13 号车钩；同时加强车钩检修质量；配合面处的磨耗要焊补恢复原型如牵引突缘、冲击突肩、钩舌锁面和钩舌内侧面等处磨耗超限必须焊补，尤其是牵引突缘和冲击突肩处的磨耗修补尚未被注意, 厂段修也无明确规定, 今后应予以重视；尽快实施有利于提高 13 号车钩结构强度的措施，缩小车钩连接轮廓间隙，13 号车钩全部装用 E 级钢钩锁，钩体下部与车钩托梁接触处预先加焊磨耗板。

　　文章建议开展车钩疲劳寿命研究，深入研究车钩疲劳寿命, 探索车钩疲劳强度计算方法, 制定车钩疲劳试验标准, 以便能科学、合理地评估车钩疲劳强度和控制车钩使用寿命, 为车钩制造技术条件和检修规程的制定提供依据。

　　车钩失效分析及其工艺研究

　　文章对车钩零件疲劳和磨损失效的原因进行了分析，并对其失效机理进行了研究。对车钩零件裂纹分析，得出车钩磨损的主要形式为粘着磨损以及伴随着磨损而产生的.磨粒磨损。对车钩零件进行了失效分析及机理研究的基础上提出了不改变车钩现有材料的基础上，通过改变热处理工艺来提高车钩零件耐磨性。此外，对车钩零件进行探伤检测是最为有效的方法，对车钩零件表面缺陷及成因进行了分析，确定了探伤方法为采用交叉线圈旋转磁场技术的磁粉探伤，同时采用湿法连续法工艺。另外作者对磁粉探伤工艺进行了初步论证以应用于实际生产及工作。

　　米轨铁路火车车钩分离的原因及防止措施

　　文章对米轨货车车钩缓冲装置进行现状调查，分析产生车钩自然分离事故的原因，提出了防止措施，控制因车钩自然分离事故而干扰正常的运输生产秩序和危及行车安全的被动局面。

　　通过的造成车钩自然分离事故分析，得出有8个因素，钩提链松余量及钩提杆横动量的影响，钩腔内部尺寸不标准的影响，钩腔内部尺寸磨耗严重及配件加修不良的影响，钩提杆弯曲变形或憋劲的影响，防跳间隙过大或过小的影响，钧耳变形和钩舌销磨耗的影响，两连挂车辆互钩差超限的影响，上锁销杆孔及上锁销磨耗的影响。

　　作者提出了防止措施，规范上作用车钩提杆链松余量测量方法，规范上作用车钩提杆左、右横动量的测量方法，规范装用2号钩的C31、 P31、N31车的险修方法，规范钩腔内部配件的检修方法，变更上作用钩提杆链的安装方式，规范列检及辅修时的检修方法。

　　篇二

　　Book Review

　　During last month, I read White Fang, written by Jack Londona.The book is about a wolf cub making its way in the world and how this cub learns things and sees things. And I enjoyed it a lot. Usually, I would start reading before sleep. Not until I got sleepy and couldn’t understand the plots, did I put down the book and went sleep. The book White Fang deeply touched my heart. Firstly,I will introduce the story of this book briefly.This cub was called white fang, because at first the cub’s teeth was white. The cub’s growing path is like a child grows up, the path is full of pains and sorrows, little of happiness. He was a gray wolf born by Kiche. He had a lot of challenges after his mother was sold to another Indian when he was just a puppy. He had to deal with people that never showed him affections, to cruel people who hurt him. Dogs in the village always terrorized him, especially one named Lip-lip. All of that made Fang became more and more fierce. When in Fort Yukon, Fang was passed into the hands of Beauty Smith. Then his life was in a real mess! He fought with other dogs until he was saved by Scott, who showed his love on Fang. And they were good friends later. Scott took Fang back to California to live with his family. Little by little, Fang learned how to love and became a faithful watchdog. He even had puppies with one of the master's dogs named Collie.

　　Secondly, I'd like to share my understanding of this story. I have thought a lot of the details. And I will give an example as follows. When Fang's mother Kiche was sold to another indian , Fang cried and beat. He missed his mother so much that he even stayed at the Indian's camp waiting for his mother's regression. He gave up his freedom just for his mom! It makes me believe that though freedom is important, family is always the more valuable. However, when Fang met Kiche again everything was changed. Both of them had changed a lot. His mother had other new puppies with her and Fang had already grown up and he was a large, strong wolf then. Fang observed her for a long time and finally reminded of her. Unfortunately, his mother stopped his forward and they failed to recognize each other. He came to realize he was no longer a puppy, and he was old enough to live himself! Suddenly it occurred to me that no matter how we hate to part with each other, as time went by, we'll finally forget the past and adapt well to the new life system.

　　Thirdly, let's see something behind the story. In general terms, Fang had 3 masters in total. The first Grey and the second Beauty both gave him a life away from love and this made Fang became more and more fierce. Only Scott, who ruled him by love that made Fang happy and content. It seems that love alone can woken love. People should show their love to each other as well as animals even in their hard time. After all, Only love can make us happy. Maybe that is the main idea.

　　Finally, I’d like to share with you the paragraph I like best :The little wolf had never seen these things before.He was afraid. Soon, he was excited by the new things that he saw, and he forgot to be afraid. He saw things that were close to him and things that were far away. Suddenly, he fell down a hill. His little body rolled and rolled. He hit his nose on the ground, and he began to cry.Because the inside of the cave was flat, he didn't understand how the ground could not be flat sometime.

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