无码三级国产三级在线电影,国产超碰人人做人人爽av大片 ,日本成熟老妇乱,日韩成人一区二区三区在线观看

Home > News > Industry Information >

Common problems in the production process of brake shoes

Apr 03, 2025

The common problems in the production process of brake shoes mainly involve materials,processes,and quality inspection.The following is a specific introduction:

Material issues

Uneven material:The material used to produce brake shoes exhibits uneven composition and performance.For example,uneven distribution of various elements in cast iron brake shoes can lead to differences in hardness,strength,and wear resistance in different parts of the brake shoes,affecting braking effectiveness and service life.

Unstable quality of raw materials:The quality of raw materials fluctuates greatly,such as resin,fiber and other raw materials used in the synthesis of brake shoes.If their performance indicators do not meet the requirements,the friction performance,heat resistance and mechanical strength of the brake shoes will not meet the standards.

process problems

Casting defects:During the casting process of cast iron brake shoes,defects such as porosity,sand holes,and shrinkage porosity may occur.These defects will weaken the structural strength of the brake shoes,leading to cracks or even fractures during the braking process,which affects driving safety.

Improper pressing process:The composite brake shoe adopts pressing process.If the pressing pressure is insufficient,the holding time is not enough,or the temperature control is improper,the density and hardness of the brake shoe will not meet the requirements,and the bonding between the layers will not be tight,which is prone to delamination and reduces the overall performance of the brake shoe.

Heat treatment issue:The heat treatment process in the production of brake shoes is crucial.If the heat treatment parameters are not accurate,such as heating rate,insulation time,cooling method,etc.,improper control can cause the metallographic structure of the brake shoes to not meet the requirements,thereby affecting their hardness,toughness,wear resistance and other properties.

Quality inspection issues

Imperfect testing equipment:Some brake shoe manufacturing enterprises have insufficient accuracy or aging testing equipment,which cannot accurately detect various performance indicators of brake shoes.For example,inaccurate friction coefficient testing equipment can lead to misjudgment of brake shoe friction performance.

The testing standards are not strict:Enterprises do not strictly follow relevant standards for testing,or relax the testing requirements for some key indicators,resulting in some unqualified products entering the market and posing hidden dangers to railway transportation safety.


Contact Us
  • Tel: +86-0317-8196155
  • E-mail: 2461087283@qq.com
  • Add: Botou Industrial Zone, Hebei Province, China
Follow Us
一区二区和激情视频| 国产欧美亚洲日韩图片| 国产亚洲综合aa系列| 久久www成人片免费看| 国产麻豆乱子伦午夜视频观看| 久久久久无码精品国产h动漫| 国产一区二区三区| 一区二区三区国产| 国产萌白酱喷水视频在线播放| 国产亚洲精品久久久久久老妇| 中文字幕亚洲欧美在线不卡| 午夜成人理论福利片| 欧美成人精品高清视频在线观看| 国产精品 无码专区| 无码人妻少妇精品无码专区漫画| 亚洲乱码av一区二区| 国产偷v国产偷v亚洲高清| 嫩草伊人久久精品少妇av| 国产美女遭强被高潮网站| 人妻系列无码专区免费视频| 嫩草伊人久久精品少妇av| 国产99视频精品专区| 亚洲色欲av无码成人专区| 亚洲愉拍自拍欧美精品| 国产在线精品无码不卡手机免费| 国产福利精品一区二区| 99爱精品成人免费观看| 精品无码国产污污污免费| 99无码人妻一区二区三区免费| 99爱国产精品免费高清在线| 精品国产三级大全在线观看| 日韩精品成人一区二区三区| 久久久久黑人强伦姧人妻| 5858s亚洲色大成网站www| 日本高清免费毛片久久| 成人禁片免费播放35分钟| 国产亚洲精品aaaa片app| 日韩av无码午夜免费福利制服| 免费无码又爽又黄又刺激网站| 精品久久亚洲中文字幕| 美女扒开大腿让男人桶|