Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (6): 1959-1966.doi: 10.13229/j.cnki.jdxbgxb20200647

Previous Articles    

Influences of interference fit and knurling connection type on press fitting failure of assembled camshaft

Jian-bin CHEN1,2,3(),Song-ze ZHOU3,Feng-yong FEI2,Yong-long CHEN2,Guo-ping LING1   

  1. 1.School of Materials Science and Engineering，Zhejiang University，Hangzhou 310058，China
    2.SLPT State-level Enterprise Engineering Center，Ningbo Shenglong Group Co. ，Ltd. ，Ningbo 315000，China
    3.School of Mechanical Engineering and Mechanics，Ningbo University，Ningbo 315211，China
  • Received:2020-08-20 Online:2021-11-01 Published:2021-11-15

RICH HTML

 16   

PDF (PC)

323

Abstract:

Based on the finite element method， the influences of the interference fit and knurling connection types on the two major press fitting failure problems including plastic deformation and sliding during knurling connection of assembled camshaft were investigated. The results indicate that a large press fitting force and frictional shear stress could be obtained for a large interference fit to inhibit the sliding between the fit surfaces. On the other hand， the cam profile’s radial displacement magnitude and gradient change increase with the e interference fit， resulting in an obvious stress concentration around the transition region of cam profile. To keep the fit surfaces from sliding， the axial knurling connection is suggested when the hardness of shaft is larger than that of cam. Instead， the radial knurling connection is more beneficial to inhibit the occurrence of sliding between the fit surfaces for a assembled camshaft with a softer shaft. The press fitting force obtained from the radial knurling connection test of assembled camshaft validates the rationality of both the 1/36 finite element model and the complete finite element model.

Key words: vehicle engineering, assembled camshaft, knurling connection, interference fit, connection strength, plastic deformation

CLC Number: 

  • U466

Fig.1

Typical knurling connection types"

Fig.2

Cracking failure near the transitionregion of cam profile"

Fig.3

Geometry size of the cam and knurling tool"

Fig.4

Flow stress of 100Cr6"

Table 1

Material properties of 100Cr6 and E355"

材料

密度

/（kg·m-3）

弹性模量/GPa泊松比屈服强度/MPa
100Cr67.83×1032120.269552.8
E3557.80×1032090.300345.0

Fig.5

Simulation model of assembled camshaft"

Fig.6

Displacement nephogram of the cam"

Fig.7

Hoop stress contour of the cam"

Fig.8

Frictional shear stress on contact surface of shaft"

Fig.9

Press fitting force history of the cam"

Fig.10

Frictional shear stress of the shaftin axial knurling connection"

Fig.11

Press fitting force of cam for axialknurling connection"

Fig.12

Test equipment for radial knurling connection"

Table 2

Press fitting force measured from experiment"

试验组别第1组第2组第3组第4组
凸轮117.2317.9918.1118.99
凸轮214.8615.7015.4215.63
凸轮315.3716.1916.9216.00
凸轮414.9715.9616.4315.42
凸轮515.7816.9816.2216.26
凸轮616.2816.3215.9816.80
凸轮715.7515.7416.1216.17
凸轮814.6416.3415.7815.74

Fig.13

Equipment and sample for stress testing"

Table 3

Residual stress tested by XRDduring press fitting"

试验

组别

腐蚀深度/mm第1次应力值/MPa第2次应力值/MPa平均值/MPa备注
第1组0.48381.7373.4377.55堵头
第2组0.54288.4280.4284.40-
第3组0.51240.7253.7247.20-
第4组0.53272.3285.4278.55-
1 乔健, 寇淑清, 卢清华,等. 材料力学性能对装配式凸轮轴球体扩径连接性能的影响[J]. 锻压技术, 2018, 43(8):144-149.
Qiao Jian, Kou Shu-qing, Lu Qing-hua, et al. Influence of material mechanical properties on ball expanding and connection performance for assembled camshaft[J]. Forging & Stamping Technology, 2018, 43(8): 144-149.
2 黄进杰, 杨连发, 马建平. 基于液压胀形的三叶等距型面装配式凸轮轴的接触有限元分析[J]. 锻压技术, 2020, 45(3):101-108.
Huang Jin-jie, Yang Lian-fa, Ma Jian-ping. Contact finite element analysis on assembled camshaft with isometric-trilateral sectional profiles based on hydraulic expansion[J]. Forging & Stamping Technology, 2020, 45(3):101-108.
3 Cecchel S, Ferrario D, Mondini C, et al. Application of laser metal deposition for a new model of assembled camshaft[J]. Journal of Materials Engineering and Performance, 2019, 28(5):7756-7767.
4 Zhang P, Kou S Q, Li C, et al. Joint mechanism and prediction of strength for a radial knurling connection of assembled camshaft using a subsequent modeling approach[J]. SAE International Journal of Engines, 2018, 11(3): 301-310.
5 齐红敏. 粉末冶金复合凸轮过盈装配的应力研究[D]. 北京:北京有色金属研究总院, 2016.
Qi Hong-min. research on the interference assembly stress of powder metallurgy cam with composite layered structure[D]. Beijing: General Research Institute for Nonferrous Metals, 2016.
6 张驰, 徐沛娟, 何东野, 等. 凸轮轴横向滚花连接的压装扭转数值模拟分析[J]. 吉林大学学报: 工学版, 2012, 42():216-220.
Zhang Chi, Xu Pei-juan, He Dong-ye, et al. Research on the transverse knurling connection mechanism of assembled camshaft and numerical simulation analysis on the press mounting and torsion process[J]. Journal of Jilin University(Engineering and Technology Edition), 2012, 42(Sup.1):216-220.
7 寇淑清, 石舟, 朱欢, 等. 滚花联接凸轮轴装配过程数值仿真及影响因素分析[J]. 精密成形工程, 2019, 11(1):63-69.
Kou Shu-qing, Shi Zhou, Zhu Huan, et al. Simulation analysis on knurling connection process and influencing factors of assembled camshaft[J]. Journal of Netshape Forming Engineering, 2019, 11(1):63-69.
8 Zhang P, Kou S, Lin B, et al. Optimization for radial knurling connection process of assembled camshaft using response surface method[J]. International Journal of Advanced Manufacturing Technology, 2015, 77(1-4): 653-661.
9 郭爱贵, 范为民, 孙伟, 等. 基于有限元法的过盈配合接触特性分析[J]. 成组技术与生产现代化, 2009, 26(4):4-7.
Guo Ai-gui, Fan Wei-min, Sun Wei, et al. Contact characteristics analysis of interference fit based on finite element method[J]. Group Technology & Production Modernization, 2009, 26(4):4-7.
10 袁靖, 赵蛟, 姚进, 等. 不同材料对圆柱滚花过盈联接连接强度的影响[J]. 陕西理工大学学报:自然科学版, 2020, 36(1):8-13, 48.
Yuan Jing, Zhao Jiao, Yao Jin, et al. Influence of different materials on connection strength in knurling connection[J]. Journal of Shaanxi University of Technology(Natural Science Edition), 2020, 36(1):8-13, 48.
[1] Xing-jun HU,Jing-long ZHANG,Yu-fei LUO,Li XIN,Sheng LI,Jin-rui HU,Wei LAN. Influence investigation of cooling tube structure and airflow direction on thermal⁃hydraulic performance of air⁃cooled charge air cooler [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(6): 1933-1942.
[2] Yong LUO,Yong-heng WEI,Huan HUANG,Ren-jie XIAO,Lin REN,Huan-yu CUI. Starting control of P2.5 plug⁃in hybrid configuration dual⁃clutch based on driver's intention recognition [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(5): 1575-1582.
[3] Xiao-hua ZENG,Mei-jie SONG,Da-feng SONG,Yue WANG. Data processing method of bus driving cycle based on vehicular network information [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(5): 1692-1699.
[4] Chao MA,Yun-kai GAO,Zhe LIU,Yue-xing DUAN,Lin-li TIAN. Optimization of multi⁃material and beam cross⁃sectional shape and dimension of skeleton⁃type body [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(5): 1583-1592.
[5] Feng-chong LAN,Ji-wen LI,Ji-qing CHEN. DG-SLAM algorithm for dynamic scene compound deep learning and parallel computing [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1437-1446.
[6] Jian YANG,Qi XIA,Hai-chao ZHOU,Guo-lin WANG. Noise reduction mechanism of truck radial tire based on modified carcass string contour design [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1198-1203.
[7] Jiang-qi LONG,Jin-tao XIANG,Ping YU,Jun-cheng WANG. Linear disturbance observer suitable for sliding mode control of nonlinear active suspension [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1230-1240.
[8] Xin CHEN,Gui-shen YU,Biao ZHANG,Kai-xuan PAN,Li-fei YANG. Equivalent modeling of tensile-shear behavior for friction stir spot welding joints [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1190-1197.
[9] Da-feng SONG,Li-li YANG,Xiao-hua ZENG,Xing-qi WANG,Wei-zhi LIANG,Nan-nan YANG. Battery life optimization of hybrid electric vehicle based on driving cycle construction [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 781-791.
[10] Jia-xu ZHANG,Xin-zhi WANG,Jian ZHAO,Zheng-tang SHI. Path planning and discrete sliding mode tracking control for high⁃speed lane changing collision avoidance of vehicle [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 1081-1090.
[11] Ren HE,Xiao-cong ZHAO,Yi-bin YANG,Jian-qiang WANG. Man⁃machine shared driving model using risk⁃response mechanism of human driver [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 799-809.
[12] Bo WANG,Yang-yang HE,Bing-bing NIE,Shu-cai XU,Jin-huan ZHANG. Abdominal injury of vehicle occupant in underbody blast events [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 792-798.
[13] Wei-min ZHUANG,Peng-yue WANG,Rui-juan GAO,Dong-xuan XIE. Effect of hot forming on static mechanical properties of AA5754 aluminum alloy [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 847-854.
[14] Qiang SONG,Dan-ting SUN,Wei ZHANG. Shift nonlinear modeling and control of automated mechanical transmission in pure electric vehicle [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 810-819.
[15] Shou-tao LI,Rui WANG,Jing-chun XU,De-jun WANG,Yan-tao TIAN,Ding-li YU. A vehicle collision avoidance control method based on model predictive composite control [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(2): 738-746.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Jilin University(Engineering and Technology Edition), All Rights Reserved.
Tel: +86-431-85095297　Fax: +86-431-85094074　E-mail: xbgxb@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd