欧美人妻精品一区二区三区99,中文字幕日韩精品内射,精品国产综合成人亚洲区,久久香蕉国产线熟妇人妻

 Meetyou company has been making YG series cemented carbide molds since 2003. Through practical verification and repeated test comparison, the structure and processing method of cemented carbide parts have been continuously improved. Stable use in production has created considerable economic benefits for the company.

1. Cemented carbide die structure

Due to the particularity of cemented carbide, its price remains high. In order to reduce the die cost, it is often used in the most critical part in the manufacturing process – the die structure with cemented carbide parts. The die inlaid with ring and block cemented carbide sleeve has simple structure and simple processing method. At present, it has been widely used in molds for forming, drawing and other processes.

How does Meetyou? Make Cemented Carbide Die? 1

  The outer circumferential surface of cemented carbide is used as the working surface (see Fig. 1 and Fig. 3); The inner circumferential surface of cemented carbide is used as the working surface.

How does Meetyou? Make Cemented Carbide Die? 2

2. Cemented carbide die making procedures

The assembly and fixing of insert sleeve the insert sleeve of cemented carbide die is traditionally welded with molten copper and hot installed. According to the steel materials matched with cemented carbide, the reasonable interference is selected to roughen the assembly joint surface. Cemented carbide is a powder metallurgy material with high compressive strength and low tensile strength.

(1) Inlaid cemented carbide jacket is mostly welded with copper. Dehydrated borax is used. The inner hole of cemented carbide jacket is roughened, and the peripheral joint surface of inner core and outer circle of steel material is processed into polygon. The cemented carbide inner hole and steel inner core adopt the structure of inner junction polygon, so that after they are matched, they can not only ensure the positioning accuracy, but also make the molten copper flow smoothly into the gap of polygon and be firmly integrated.

If an interference fit is used, use a small interference fit to prevent brace cracking.

Note: after copper welding, it shall be kept warm in time, put into the oven or embedded with materials with good thermal insulation, slowly reduce it to room temperature, and remove the internal stress by aging.

How does Meetyou? Make Cemented Carbide Die? 3

 (2) Insert the cemented carbide inner sleeve. In order to prevent loose fit during use, use interference fit, heat the steel outer sleeve and press it into the cemented carbide inner sleeve. However, the proper amount of interference shall be strictly controlled to prevent excessive support cracking of the steel jacket.

Note: heat preservation shall be carried out in time after hot assembly as after welding, and materials with good heat preservation shall be put into the oven or embedded, slowly reduced to room temperature, and the internal stress shall be removed by aging.

(3) The method of physical cold extrusion fixation is adopted. In the manufacturing process, the steel material and cemented carbide sleeve have small interference and are extruded and fixed with fine threads, and the threaded connection is coated with locking anaerobic glue.

the assembly methods of traditional structures are with simple structure and low manufacturing cost. The disadvantage is that whether it is hot charging or copper welding, it will more or less adversely change the structure of frame material and YG8 material; The insert sleeve is easy to crack and fall off during use.

How does Meetyou? Make Cemented Carbide Die? 4

  more and more assembly methods have been adopted in recent years to avoid the impact of high temperature on the die material and ensure the stability of the die in the use process. The disadvantage is that the manufacturing process is complex and the processing technology requirements are high.

Добавить комментарий

Ваш адрес email не будет опубликован. Обязательные поля помечены *

被公侵犯中文字幕在线观看| 国产激情内射免费精品| 久久噜噜噜久久熟女精品| 成年人的一级黄色带| 天天天天天干夜夜夜夜夜操| 国产女主播喷出白浆视频| 熟妇丰满大阴户熟妇啪啪| 免费黄色 操逼视频| 男女真人牲交高潮全过程| 男人几把操女人嫩穴| 非洲人粗大长硬配种视频| 看看美日韩操逼吧| 亚洲av无一区二区三区综合| 美国大鸡巴操逼视频| 青娱乐极品视觉导航| 影音先锋天堂网亚洲无码| 男人扒开女人腿狂躁免费| 免费女人男人肏逼| 高颜值情侣鸡巴插插淫叫| 丝袜片一区二区三区四区五区| 操美女逼逼色逼网| 久久久精品亚洲Av| 天天舔操操操av| 男人操女人下面国产剧情| 99草草视频在线精品| 大鸡巴插入骚穴在线观看| 黑人大吊性交啪啪啪| 国产精品亚洲一区二区三区极品| 久久噜噜噜久久熟女精品| 精品麻豆亚洲欧美| 国产精品无码一二区免费| 一区二区国产欧美日韩无| 国产精品自在自线。| 插女生那个的视频| 美女肏肏逼应用下载| 99视频在线看免费视频| 粉色av一区二区三区| 久久婷婷综合五月一区二区| 翘臀小穴在线观看| 偷窥国内肥臀老熟女视频| 国产精品一区二区在线观看91|