国产熟女一区二区三区五月婷,中文亚洲av片不卡在线观看,亚洲精品国产suv一区88,亚洲成av人片在线观看www

Welcome to the official website of Dalian wanderrui Import & Export Co., Ltd!

National consultation hotline

0411-66886100

Your current location : home >> News >> Company news

What is the structural design of the casting?

Date of issue:2016-04-07 00:00 Source:http://hychibao.com Click:

What is the structural design of the casting?


Dalian castings are cleaned manually by means of wire brushes, chisels, files, air shovels and other tools. Manual cleaning has high labor intensity, poor sanitary conditions and low efficiency. However, for some castings with complex shapes, manual cleaning is more appropriate. Qualified products refer to castings whose appearance quality and internal quality meet the current national or industrial standards, the production process and quality are stable, and the user's evaluation can meet the service performance, 60<c<80; First class products refer to castings whose appearance quality and internal quality meet the current national or industrial standards, the production process and quality are stable, and the quality evaluated by users reaches the domestic advanced level. From the origin of metal casting to now, both at home and abroad, people in gravity casting to a large extent use molten metal, then pour it into the pre cast mold, with the help of self weight feeding and solidification of the metal, so as to obtain the designed castings. Whether it is black metal or non-ferrous metal, people still use the above methods to produce castings.


Many workers have done a lot of work on the theory of sequential solidification, but so far, how to make the castings designed by ourselves achieve the ideal sequential solidification and successfully meet the sequential feeding solidification of castings with the help of it. So as to achieve the goal of good internal quality of castings, which has not yet provided an ideal calculation control method. This method can be said to be an effective method to properly arrange the shrinkage cavity and porosity of castings due to insufficient shrinkage. During solidification, the concentration of solute in the precipitated phase is different from that in the liquid phase. In most cases, the concentration of solute in the liquid phase is too rich to diffuse, which makes the chemical composition of the successively solidified part uneven.


The casting continues to cool after solidification, and the solid shrinkage is hindered to produce the casting internal stress. When the internal stress reaches a certain value, the casting will be deformed or even cracked. Sand holes are also common defects of cylinder block castings, which are mostly seen on the upper mold surface of the casting, but also exposed after processing on the inner surface of the cylinder barrel. The design of the gating system is unreasonable. Macropores formed at the hot spot or the last solidified part of a casting due to poor feeding during solidification The distribution characteristic is concentrated shrinkage; When the crystallization temperature range of the alloy is wide, there is a wide solidification region of liquid and solid phases after the crust on the surface of the casting. Continue to solidify, and the solid phase continues to increase. Die forging is divided into open die forging and closed die forging. Forgings are obtained by pressing and deforming metal blanks in a certain shape forging die chamber, which can be divided into cold heading, roll forging, radial forging, extrusion and so on.



Relevant labels:

Recent browsing:

Related products:

Related news:

大連船用零部件

Scan and pay attention to us

National consultation hotline:

0411-66886100

Q Q:52410155

Mailbox:wangdewen@wanderui.com

          zhuxingguang@wanderui.com

Address:No. 730, Southwest Road, Shahekou District, Dalian

Dalian wanderrui Import & Export Co., Ltd版權(quán)所有  Specializing in大連鑄造件,大連船用零部件,大連電機(jī)殼  遼ICP備16001801號
Powered by Clouds platform  Technical Support:聯(lián)企時(shí)代
Main business area: 大連 沈陽 鞍山 撫順 本溪 丹東 錦州 營口 阜新 遼陽
Online Service
share
厨房挺进朋友人妻| 久久久精品人妻无码专区不卡| 无码一区二区三区亚洲人妻| 免费毛儿一区二区十八岁| 精品熟女少妇av免费观看| 伊人无码精品久久一区二区| 性色欲情网站| 极品人妻被浓精喂饱| 高雅人妻被迫沦为玩物| 在线无码免费网站永久| av色欲无码人妻中文字幕| 免费无码久久成人网站| 亚洲AV成人无码网站一区二区| 国产精品自在线拍国产| 豆国产96在线 | 亚洲| 亚洲色欲色欲大片www无码| 亚洲人av在线无码影院观看| 国产肉体xxxx裸体137大胆| 国产日韩成人内射视频| JAPANESE国产在线观看播放| 国产粉嫩馒头无套内在线观看免费 | 大屁股大乳丰满人妻| 亚洲午夜无码极品久久| 97久久精品无码一区二区天美| 无码精品人妻一区二区三区影院 | 少妇极品熟妇人妻| 免费看国产曰批40分钟| 四虎国产精品永久在线无码| 人妻夜夜爽天天爽三区麻豆av网站| 国产尤物精品视频| 国产久9视频这里只有精品| 99国产精品久久人妻无码| 亚洲大码熟女在线观看| 久久国产亚洲精品无码| 国产精品久久久久久久9999| 国产精品日本一区二区不卡视频| 久久自己只精产国品| 邻居一晚让我高潮3次正常吗| 精品久久久久久国产| 精品一区二区三区免费视频| 狼狼综合久久久久综合网|