亚洲国产欧美经典三级|精品国产成人高清在线|亚洲色无码专线精品观看|国内色综合精品视频在线|无码专区人妻糸列日韩精品|精品国产一区二区av麻豆|国产草莓精品国产a∨片国产|国产欧美日韩视频一区二区三区

Jiaxing Xincan Hardware Co., Ltd. About USMap Contact

News

Tell

0573-87761990

The stainless steel screw manufacturer tells you that the screw has a saying that "three turns and

Time:2019-04-03

There are many manufacturers in the machinery industry or automobiles that require employees to tighten the screws when assembling. “Turn three turns and retreat half a circle”. Many people don't quite understand what it means. Why do you want to retire? Everyone tightens the screws and tightens them up. Why do you want to “snap and retreat”? Today, stainless steel screw manufacturers tell you why this is:

After tightening, the stainless steel screws should be additionally applied with a pre-tightening force to prevent loosening. Therefore, the pre-tightening force will be eliminated after loosening half a turn, and the screws will be elastically deformed after tightening, especially in the case of high temperature and shock load. Under the long-term, such continuous pressure will produce creep, and after the screw becomes plastically deformed, its strength will drop or even fail. Retracting a half turn is to restore the elastic deformation and eliminate the pre-tightening stress. After the screw is subjected to continuous pressure deformation or elastic deformation, the probability of plastic strain and failure is greatly reduced, so that the screw can maintain a constant high-strength pressure. And directly twisting two and a half turns can not achieve this effect.

山丹县| 大同市| 湾仔区| 利辛县| 灯塔市| 靖江市| 阿荣旗| 邛崃市| 华阴市| 吴江市| 建始县| 西盟| 靖江市| 龙海市| 余姚市| 容城县| 鹿邑县| 临江市| 邢台市| 曲沃县| 花莲市| 崇仁县| 苍溪县| 天等县| 上饶市| 兰州市| 诏安县| 上林县| 珠海市| 灌阳县| 临湘市| 乌鲁木齐市| 潼关县| 赤壁市| 河北省| 湖北省| 从江县| 玛沁县| 南漳县| 永新县| 灵石县|