[1]何德孚,苏永强,容松如,等.不锈钢弯管的皱波问题及其预防措施(下)[J].焊管,2017,40(8):23-32.[doi:10.19291/j.cnki.1001-3938.2017.08.005]
 HE Defu,SU Yongqiang,RONG Songru,et al.The Wrinkle Problem of Stainless Steel Elbow Pipe and Its Preventive Measures(Ⅱ)[J].,2017,40(8):23-32.[doi:10.19291/j.cnki.1001-3938.2017.08.005]
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不锈钢弯管的皱波问题及其预防措施(下)()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
40
期数:
2017年第8期
页码:
23-32
栏目:
应用与开发
出版日期:
2017-08-28

文章信息/Info

Title:
The Wrinkle Problem of Stainless Steel Elbow Pipe and Its Preventive Measures(Ⅱ)
文章编号:
10.19291/j.cnki.1001-3938.2017.08.005
作者:
何德孚1苏永强2容松如1罗 剑2
1. 上海久立工贸发展有限公司, 上海 200135;
2. 浙江德传管业有限公司, 浙江 湖州 313103
Author(s):
HE Defu1 SU Yongqiang2 RONG Songru1 LUO Jian2
1. Shanghai Jiuli Industrial & Commercial Development Co., Ltd., Shanghai 200135, China; 
2. Zhejiang Detrans Piping Co., Ltd., Huzhou 313103, Zhejiang, China
关键词:
不锈钢管冷弯拱腹皱波绕弯式弯管机“薄”壁度芯棒型式模具间隙压杆失稳屈折
Keywords:
stainless steel pipecold-bendingwrinkle wave of intradosdraw bender“thin”wall degreemandrel typedie gappressure rod unstability and buckling
分类号:
TG337.5
DOI:
10.19291/j.cnki.1001-3938.2017.08.005
文献标志码:
B
摘要:
为了预防不锈钢管冷弯时出现皱波的问题,首先从管件制造标准化角度考察和评估了冷弯方法的优点及其合理应用范围,然后通过两个典型案例分析了冷弯时发生皱波的“薄”壁条件和影响因素。分析指出,皱波的实质是拱腹压缩塑性变形区的“压杆”失稳屈折现象。依据钢管to/do和Ro/do决定的弯管“薄”壁度,合理设置芯棒型式模具加工精度和安装“间隙”,从力学上增强“压杆”抗压稳定度,是预防皱波的必要保障。不锈钢管制造标准允许的to和do公差带往往大于“薄”壁弯管所必须的模具间隙,有时会在小批量多品种规格不锈钢弯管时产生皱波,但只要把握“薄”壁度,重视芯棒结构、模具间隙及弯管参数的合理调整,不锈钢冷弯管时的皱波问题是可以解决的。
Abstract:
In order to prevent wrinkling problem during stainless steel pipe cold bending, first of all, from the perspective of pipe fittings manufacturing standardization, it inspected and evaluated the advantages of cold bending method and its reasonable application scope, then analyzed the "thin” wall condition and influence factors when stainless steel cold bending through two typical cases. The analysis indicated that the essence of the wrinkling is pressure rod unstability and buckling phenomenon in intrados compressive plastic deformation area. According to the steel pipe “thin” wall degree decided by to/do and Ro/do, set up reasonably mandrel type, and the clearance determined by other mold processing and installation presicion, to strengthen the stability against crushing of compression bar from mechanics, this is a necessary safeguard against wrinkling. The tolerance zone of to and do specified in stainless steel pipe manufacturing standard is often than the die clearance of "thin” wall thickness bends, sometimes the wrinkling appear in small batch multivarietal specifications stainless steel elbow pipe. However, as long as grasp the "thin" wall thickness degree, pay attention to the core rod structure, reasonably adjust die clearance and bending pipe parameters, the wrinkling problem of stainless steel cold bend can be solved.

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备注/Memo

备注/Memo:

收稿日期:2017-04-19

作者简介: 何德孚, 男, 上海交通大学教授,上海久立焊管研究所所长。

更新日期/Last Update: 2017-12-08