锻压技术

空心六角法兰面螺栓冷挤压成形工艺与同心度分析

英文标题：Cold extrusion process and concentricity analysis on hollow hexagonal flange bolts

作者：朱景秋张东民吕雷雷周伟民

分类号：TG376

出版年,卷(期):页码：2020,45(3):70-76

摘要：

分析了金属反挤压时内部各质点的流动规律与空心六角法兰面螺栓的结构特征，其最大特点是在保证同心度为0.2 mm的前提下，成形孔径比高达6.5的深孔，并初步设计4工位冷挤压成形工艺。运用DEFORM-3D重点研究了工序3深孔预成形过程，在刚性平移区选取4个点，利用点追踪方法，以所选点的径向偏移量为评价标准，研究了圆锥凸模、平底锥形凸模、球头凸模和平底凸模4种凸模结构对深孔同心度的影响程度。同时，对比成形初期金属流动情况、行程载荷，综合结果表明：圆锥凸模能在较低的成形载荷下得到良好的金属流线，有利于提高制件同心度。最后，通过JBF-19B-4S螺栓冷镦机进行试模，生产出成形饱满、无缺陷，且同心度达到设计要求的制件，为深孔类零件冷挤压成形提供了一种参考。

The flow law of internal mass points and the structural characteristics of hollow hexagonal flange bolts during reverse extrusion were analyzed, its main feature was to form deep holes with a hole diameter ratio of 6.5 on the premise of ensuring the concentricity of 0.2 mm, and the four-station cold extrusion process was preliminarily designed. Then, the pre-forming process of deep hole in step 3 was studied by DEFORM-3D, and four points were selected in the rigid translation area to study the influences of four punch structures such as conical punch, conical punch with flat bottom, ball head and flat bottom on the concentricity of deep holes by point tracking method and on the radial offset of selected points was taken as the evaluation criterion. At the same time, compared with the metal flow and the travel load in the initial stage of forming, the comprehensive results show that the conical punch gets good metal streamline under lower forming load, which is conducive to improving the concentricity of parts. Finally, the full-formed and defect-free parts with concentricity meeting the design requirements are produced by JBF-19B-4S bolt cold heading machine, which provides a reference for cold extrusion forming of deep-hole parts.

基金项目：

企业横向项目(J2017-184)

朱景秋(1994-)，男，硕士研究生 E-mail：1210550874@qq.com 通讯作者：张东民(1968-),男，博士，教授 E-mail: dmzhang_nuaa@sit.edu.cn

参考文献：

［1］冯文杰,况智允,陈莹莹,等. 齿轮空心坯正挤压工艺参数对同心度的影响规律研究
［J］.重庆理工大学学报：自然科学,2018,32(3):62-67.

Feng W J，Kuang Z Y，Chen Y Y，et al. Influence law research of forward extrusion process parameters on concentricity of gear hollow billet
［J］. Journal of Chongqing University of Technology：Natural Science，2018,32(3):62-67.

［2］黄少东,张志明,庞丹,等. 带底深孔空心件热成形工艺改进分析
［J］.精密成形工程,2014,6(1):27-31，37.

Huang S D，Zhang Z M，Pang D，et al. Improvement analysis of thermoforming technology for bottomed hollow part with deep hole
［J］. Journal of Netshape Forming Engineering，2014，6(1):27-31,37.

［3］辜志勇. 花键轴冷挤压弯曲变形研究
［D］.重庆：重庆理工大学,2012.

Gu Z Y. Research on Bending Deformation of Spline Shaft in Cold Extrusion
［D］. Chongqing: Chongqing University of Technology，2012.

［4］王晓飞. 炮弹战斗部壳体壁厚差成形因素分析及其模具改进
［D］.洛阳：河南科技大学,2013.

Wang X F. Wall Thickness Difference Forming Factors Analysis and Die Improvement of Projectile Warhead Shell
［D］. Luoyang: Henan University of Science and Technology，2013.

［5］洪慎章. 实用冷挤压模设计与制造
［M］. 第2版.北京：机械工业出版社，2016.

Hong S Z. Practical Cold Extrusion Die Design and Manufacturing
［M］. The Second Edition. Beijing: China Machine Press，2016.

［6］周泰安. 变壁厚铝质深筒形件反挤压工艺模拟优化研究
［D］.广州：华南理工大学,2010.

Zhou T A. The Simulation Optimization Research of Backward Extrusion Process on Deep Cylindric Part with Variable Thickness
［D］. Guangzhou: South China University of Technology，2010.

［7］Lange K，Kammerer M，Phlandt K，等. 挤压技术: 金属精密件的经济制造工艺
［M］. 杜国辉，赵震，译. 北京: 机械工业出版社，2014.

Lange K，Kammerer M，Phlandt K，et al. Extrusion Technology: The Economic Manufacturing Process of Metal Precision Parts
［M］. Translated by Du G H，Zhao Z. Beijing: China Machine Press，2014．

［8］冯文杰,刘吉,陈莹莹,等.内斜齿轮冷挤压成形工艺方案
［J］.锻压技术,2019,44(4):95-100.

Feng W J，Liu J，Chen Y Y，et al. Cold extrusion process scheme of internal helical gear
［J］. Forging & Stamping Technology，2019，44 (4): 95-100.

［9］刘铭心,张东民,吴艳云,等.薄壁六角螺母浮动冷镦工艺分析及模具结构优化
［J］.锻压技术,2018,43(8):17-22.

Liu M X，Zhang D M，Wu Y Y，et al. Analysis on floating cold heading for thinwalled hex nut and its die
［J］. Forging & Stamping Technology，2018，43 (8): 17-22.

［10］杨锋,樊文欣,汤传尧,等.基于Simufact筒形件强力旋压与变薄拉深成形质量研究
［J］.锻压技术,2018,43(2):49-54.

Yang F，Fan W X，Tang C Y，et al. Quality research on power spinning and ironing for cylindrical part based on Simufact
［J］. Forging & Stamping Technology，2018,43 (2): 49-54.

［11］况智允. 载重汽车齿轮空心坯浮动定位套冷挤压成形方法研究
［D］.重庆：重庆理工大学,2018.

Kuang Z Y. Research on Cold Extrusion Forming Method of Floating Positioning Sleeve for Gear Hollow Billet of Truck
［D］.Chongqing: Chongqing University of Technology，2018.

［12］梁坤. A286高温合金MJ槽型自锁螺母冷挤成形及其硬化规律研究
［D］.洛阳：河南科技大学,2013.

Liang K. Research on Cold Extrusion Forming and Hardening Law of MJ Groove Profile Selflocking Nut of A286 Superalloy
［D］. Luoyang: Henan University of Science and Technology，2013.

［13］李运洋. H68黄铜深孔壳体件多工位冷挤压工艺设计及数值模拟
［D］.重庆：重庆理工大学,2017.

Li Y Y. Multi Station Cold Extrusion Process of H68 Brass Deep Hole Shell：Process Design and Numerical Simulation
［D］. Chongqing: Chongqing University of Technology，2017.

［14］郭开元,张如华,吴泽,等.主动螺旋锥齿轮镦挤成形方案的对比研究
［J］.塑性工程学报,2018,25(6):111-117.

Guo K Y，Zhang R H，Wu Z，et al. Comparative study on upsettingextrusion forming schemes of spiral bevel driving gear
［J］. Journal of Plasticity Engineering，2018，25 (6): 111-117.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】