

China Mechanical Engineering ›› 2026, Vol. 37 ›› Issue (9): 2314-2325.DOI: 10.3969/j.issn.1004-132X.2026.09.024
LU Ye(
), DING Yuqi(
), LEI Zihuang, LYU Qilin, LI Zhichao, LI Kangjian
Received:2025-08-18
Online:2026-09-25
Published:2026-10-21
Contact:
DING Yuqi
芦烨(
), 丁宇奇(
), 雷紫煌, 吕奇霖, 李智超, 李康健
通讯作者:
丁宇奇
作者简介:芦烨,女,1985年生,讲师。研究方向为杆管柱连接螺纹强度平度与优化分析。E-mail: luye_nepu@163.com基金资助:CLC Number:
LU Ye, DING Yuqi, LEI Zihuang, LYU Qilin, LI Zhichao, LI Kangjian. Effect of Geometric Defect Structures on Strength and Fatigue Life of Drill Tool Threads[J]. China Mechanical Engineering, 2026, 37(9): 2314-2325.
芦烨, 丁宇奇, 雷紫煌, 吕奇霖, 李智超, 李康健. 几何缺陷结构对钻具螺纹强度与疲劳寿命影响分析[J]. 中国机械工程, 2026, 37(9): 2314-2325.
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URL: https://www.cmemo.org.cn/EN/10.3969/j.issn.1004-132X.2026.09.024
| 三维模型 | 二维模型 | 相对误差/% | ||
|---|---|---|---|---|
整体等效 应力 | 数值/MPa | 465 | 471 | 1.3 |
| 发生位置 | 主台肩第一圈齿根 | 主台肩第一圈齿根 | ||
| 主台肩接触压力/MPa | 332 | 333 | 0.3 | |
Tab.1 External thread stress in make-up state for different models
| 三维模型 | 二维模型 | 相对误差/% | ||
|---|---|---|---|---|
整体等效 应力 | 数值/MPa | 465 | 471 | 1.3 |
| 发生位置 | 主台肩第一圈齿根 | 主台肩第一圈齿根 | ||
| 主台肩接触压力/MPa | 332 | 333 | 0.3 | |
| 第一圈齿根 | 主台肩圆角 | 应力范围 | |
|---|---|---|---|
| 外螺纹等效应力/MPa | 735 | 476 | 3~735 |
| 第一圈齿尖 | 最后一圈齿底 | 应力范围 | |
| 内螺纹等效应力/MPa | 448 | 323 | 3~447 |
Tab.2 Equivalent stress for non-defective threads
| 第一圈齿根 | 主台肩圆角 | 应力范围 | |
|---|---|---|---|
| 外螺纹等效应力/MPa | 735 | 476 | 3~735 |
| 第一圈齿尖 | 最后一圈齿底 | 应力范围 | |
| 内螺纹等效应力/MPa | 448 | 323 | 3~447 |
应力 类别 | 应力值/MPa | [σ]t/MPa | 强度条件/MPa | 强度 评定 | |
|---|---|---|---|---|---|
| 路径1 | 一次局部薄膜应力σ2 | 79 | 450 | σ2<1.5[σ]t=675 | 安全 |
| 一次加二次应力σ4 | 123 | σ4<3[σ]t=1350 | |||
| 路径2 | 一次局部薄膜应力σ2 | 238 | σ2<1.5[σ]t=675 | ||
| 一次加二次应力σ4 | 396 | σ4<3[σ]t=1350 |
Tab.3 Linearization evaluation of stress on dangerous path of external thread
应力 类别 | 应力值/MPa | [σ]t/MPa | 强度条件/MPa | 强度 评定 | |
|---|---|---|---|---|---|
| 路径1 | 一次局部薄膜应力σ2 | 79 | 450 | σ2<1.5[σ]t=675 | 安全 |
| 一次加二次应力σ4 | 123 | σ4<3[σ]t=1350 | |||
| 路径2 | 一次局部薄膜应力σ2 | 238 | σ2<1.5[σ]t=675 | ||
| 一次加二次应力σ4 | 396 | σ4<3[σ]t=1350 |
| 主台肩接触压力 | 副台肩接触压力 | |||||||
|---|---|---|---|---|---|---|---|---|
| 434 MPa | 0 | |||||||
| 牙序 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 螺纹牙最大接触压力/MPa | 693 | 331 | 279 | 238 | 223 | 216 | 210 | 204 |
| 牙序 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
| 螺纹牙最大接触压力/MPa | 196 | 187 | 179 | 174 | 179 | 227 | 408 | |
Tab.4 Contact pressure for drill tool connecting threads(non-detective threads)
| 主台肩接触压力 | 副台肩接触压力 | |||||||
|---|---|---|---|---|---|---|---|---|
| 434 MPa | 0 | |||||||
| 牙序 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 螺纹牙最大接触压力/MPa | 693 | 331 | 279 | 238 | 223 | 216 | 210 | 204 |
| 牙序 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
| 螺纹牙最大接触压力/MPa | 196 | 187 | 179 | 174 | 179 | 227 | 408 | |
| 最大应力σmax/MPa | 最小应力σmin/MPa | 发生位置 | 应力幅值σa/MPa | |
|---|---|---|---|---|
| 外螺纹 | 732.81 | 718.91 | 首圈齿根 | 6.95 |
| 内螺纹 | 436.18 | 422.84 | 首圈齿尖 | 6.67 |
| 平均应力σm/MPa | 疲劳位置 | 疲劳寿命 | ||
| 外螺纹 | 725.86 | 首圈齿根 | 5.5193×107 | |
| 内螺纹 | 429.51 | 1×109 |
Tab.5 Stress-life for connecting threads
| 最大应力σmax/MPa | 最小应力σmin/MPa | 发生位置 | 应力幅值σa/MPa | |
|---|---|---|---|---|
| 外螺纹 | 732.81 | 718.91 | 首圈齿根 | 6.95 |
| 内螺纹 | 436.18 | 422.84 | 首圈齿尖 | 6.67 |
| 平均应力σm/MPa | 疲劳位置 | 疲劳寿命 | ||
| 外螺纹 | 725.86 | 首圈齿根 | 5.5193×107 | |
| 内螺纹 | 429.51 | 1×109 |
缺陷 位置 | 整体 | |||||
|---|---|---|---|---|---|---|
| 发生位置 | 数值/MPa | 变化率/% | ||||
| 无缺陷 | 首圈齿根 | 735 | ||||
| 位置1 | 缺陷底部 | 1043 | 41.9 | |||
| 位置2 | 缺陷底部 | 836 | 13.7 | |||
| 位置3 | 缺陷底部 | 811 | 10.3 | |||
缺陷 位置 | 外螺纹 | |||||
| 首圈齿根应力/MPa | 变化率/% | 主台肩圆角应力/MPa | 变化率/% | |||
| 无缺陷 | 735 | 476 | ||||
| 位置1 | 1043 | 41.9 | 462 | |||
| 位置2 | 715 | 475 | ||||
| 位置3 | 739 | 475 | ||||
缺陷 位置 | 内螺纹 | |||||
| 首圈齿尖应力/MPa | 变化率/% | 末圈齿底力/MPa | 变化率/% | |||
| 无缺陷 | 448 | 323 | ||||
| 位置1 | 415 | 322 | ||||
| 位置2 | 426 | 323 | ||||
| 位置3 | 715 | 60.0 | 323 | |||
Tab.6 Thread stress at different defect positions
缺陷 位置 | 整体 | |||||
|---|---|---|---|---|---|---|
| 发生位置 | 数值/MPa | 变化率/% | ||||
| 无缺陷 | 首圈齿根 | 735 | ||||
| 位置1 | 缺陷底部 | 1043 | 41.9 | |||
| 位置2 | 缺陷底部 | 836 | 13.7 | |||
| 位置3 | 缺陷底部 | 811 | 10.3 | |||
缺陷 位置 | 外螺纹 | |||||
| 首圈齿根应力/MPa | 变化率/% | 主台肩圆角应力/MPa | 变化率/% | |||
| 无缺陷 | 735 | 476 | ||||
| 位置1 | 1043 | 41.9 | 462 | |||
| 位置2 | 715 | 475 | ||||
| 位置3 | 739 | 475 | ||||
缺陷 位置 | 内螺纹 | |||||
| 首圈齿尖应力/MPa | 变化率/% | 末圈齿底力/MPa | 变化率/% | |||
| 无缺陷 | 448 | 323 | ||||
| 位置1 | 415 | 322 | ||||
| 位置2 | 426 | 323 | ||||
| 位置3 | 715 | 60.0 | 323 | |||
| 位置 | 应力类别 | 应力值/MPa | [σ]t/MPa | 强度条件/ MPa | 应力 强度 评定 |
|---|---|---|---|---|---|
| 位置1 | 一次局部薄膜应力σ2 | 747 | 450 | σ2<1.5[σ]t=675 | 不安全 |
| 一次加二次应力σ4 | 816 | σ4<3[σ]t=1350 | 安全 | ||
| 位置2 | 一次局部薄膜应力σ2 | 83 | σ2<1.5[σ]t=675 | ||
| 一次加二次应力σ4 | 292 | σ4<3[σ]t=1350 | |||
| 位置3 | 一次局部薄膜应力σ2 | 114 | σ2<1.5[σ]t=675 | ||
| 一次加二次应力σ4 | 254 | σ4<3[σ]t=1350 |
Tab.7 Stress linearization evaluation for dangerous path 3
| 位置 | 应力类别 | 应力值/MPa | [σ]t/MPa | 强度条件/ MPa | 应力 强度 评定 |
|---|---|---|---|---|---|
| 位置1 | 一次局部薄膜应力σ2 | 747 | 450 | σ2<1.5[σ]t=675 | 不安全 |
| 一次加二次应力σ4 | 816 | σ4<3[σ]t=1350 | 安全 | ||
| 位置2 | 一次局部薄膜应力σ2 | 83 | σ2<1.5[σ]t=675 | ||
| 一次加二次应力σ4 | 292 | σ4<3[σ]t=1350 | |||
| 位置3 | 一次局部薄膜应力σ2 | 114 | σ2<1.5[σ]t=675 | ||
| 一次加二次应力σ4 | 254 | σ4<3[σ]t=1350 |
| 缺陷深度/mm | 最大应力 | 一次局部薄膜应力σ2/MPa | 一次加二次应力σ4/MPa | 强度评定 | ||
|---|---|---|---|---|---|---|
| 发生位置 | 数值/MPa | 变化率/ % | ||||
| 无缺陷 | 外螺纹首圈齿根 | 735 | ||||
| 0.1 | 缺陷底部 | 935 | 27.2 | 599 | 670 | 安全 |
| 0.5 | 979 | 33.2 | 621 | 699 | 安全 | |
| 1.0 | 1010 | 37.4 | 644 | 732 | 安全 | |
| 1.5 | 1045 | 38.4 | 665 | 754 | 安全 | |
| 1.8 | 1062 | 44.5 | 676 | 768 | 不安全 | |
| 2.0 | 1068 | 45.3 | 683 | 776 | 不安全 | |
| 2.3 | 1103 | 50.1 | 697 | 789 | 不安全 | |
Tab.8 Data table of equivalent stress and strength evaluation stress of threads under different defect depths
| 缺陷深度/mm | 最大应力 | 一次局部薄膜应力σ2/MPa | 一次加二次应力σ4/MPa | 强度评定 | ||
|---|---|---|---|---|---|---|
| 发生位置 | 数值/MPa | 变化率/ % | ||||
| 无缺陷 | 外螺纹首圈齿根 | 735 | ||||
| 0.1 | 缺陷底部 | 935 | 27.2 | 599 | 670 | 安全 |
| 0.5 | 979 | 33.2 | 621 | 699 | 安全 | |
| 1.0 | 1010 | 37.4 | 644 | 732 | 安全 | |
| 1.5 | 1045 | 38.4 | 665 | 754 | 安全 | |
| 1.8 | 1062 | 44.5 | 676 | 768 | 不安全 | |
| 2.0 | 1068 | 45.3 | 683 | 776 | 不安全 | |
| 2.3 | 1103 | 50.1 | 697 | 789 | 不安全 | |
| 缺陷宽度/mm | 最大应力 | 一次局部薄膜应力σ2/MPa | 一次加二次应力σ4/MPa | 强度评定 | ||
|---|---|---|---|---|---|---|
| 发生位置 | 数值/MPa | 变化率/% | ||||
| 无缺陷 | 外螺纹首圈齿根 | 735 | 安全 | |||
| 0.1 | 缺陷底部 | 1325 | 80.3 | 977 | 1322 | 不安全 |
| 0.4 | 1102 | 44.5 | 855 | 1024 | ||
| 0.8 | 1021 | 38.9 | 688 | 793 | ||
| 1.0 | 1010 | 37.4 | 644 | 732 | 安全 | |
| 1.3 | 995 | 35.4 | 584 | 656 | ||
| 1.6 | 985 | 34.0 | 543 | 608 | ||
Tab.9 Equivalent stress and strength evaluation stress of threads under different defect widths
| 缺陷宽度/mm | 最大应力 | 一次局部薄膜应力σ2/MPa | 一次加二次应力σ4/MPa | 强度评定 | ||
|---|---|---|---|---|---|---|
| 发生位置 | 数值/MPa | 变化率/% | ||||
| 无缺陷 | 外螺纹首圈齿根 | 735 | 安全 | |||
| 0.1 | 缺陷底部 | 1325 | 80.3 | 977 | 1322 | 不安全 |
| 0.4 | 1102 | 44.5 | 855 | 1024 | ||
| 0.8 | 1021 | 38.9 | 688 | 793 | ||
| 1.0 | 1010 | 37.4 | 644 | 732 | 安全 | |
| 1.3 | 995 | 35.4 | 584 | 656 | ||
| 1.6 | 985 | 34.0 | 543 | 608 | ||
缺陷 位置 | 峰值等效应力σmax/MPa | 应力幅值σalt/MPa | 峰值弹性应变εelmax | 弹性应变幅值Δεel | 峰值塑性应变εplmax | 塑性应变幅值Δεpl | 疲劳位置 | 疲劳寿命 | 降低率/% |
|---|---|---|---|---|---|---|---|---|---|
| 无缺陷 | 732.81 | 6.95 | 6.6619×10 | 6.3182×10 | 外螺纹 首圈齿根 | 5.5193×107 | |||
| 位置1 | 1023.90 | 6.70 | 1.0608×10 | 2.1301×10 | 3.3856×10 | 1.9281×10 | 缺陷底部 | 6.6241×106 | 88.0 |
| 位置2 | 817.60 | 6.58 | 7.4327×10 | 5.9818×10 | 2.1444×107 | 61.1 | |||
| 位置3 | 798.13 | 5.67 | 7.2557×10 | 5.1545×10 | 2.8913×107 | 47.6 |
Tab.10 Stress-strain-fatigue life at different defect structure positions
缺陷 位置 | 峰值等效应力σmax/MPa | 应力幅值σalt/MPa | 峰值弹性应变εelmax | 弹性应变幅值Δεel | 峰值塑性应变εplmax | 塑性应变幅值Δεpl | 疲劳位置 | 疲劳寿命 | 降低率/% |
|---|---|---|---|---|---|---|---|---|---|
| 无缺陷 | 732.81 | 6.95 | 6.6619×10 | 6.3182×10 | 外螺纹 首圈齿根 | 5.5193×107 | |||
| 位置1 | 1023.90 | 6.70 | 1.0608×10 | 2.1301×10 | 3.3856×10 | 1.9281×10 | 缺陷底部 | 6.6241×106 | 88.0 |
| 位置2 | 817.60 | 6.58 | 7.4327×10 | 5.9818×10 | 2.1444×107 | 61.1 | |||
| 位置3 | 798.13 | 5.67 | 7.2557×10 | 5.1545×10 | 2.8913×107 | 47.6 |
| 缺陷深度/mm | 峰值总应变εtotal | 峰值弹性应变εelmax | 弹性应变 幅值Δεel | 峰值塑性应变εplmax | 塑性应变 幅值Δεpl | 疲劳位置 | 疲劳寿命 | 降低率/% |
|---|---|---|---|---|---|---|---|---|
| 无缺陷 | 6.6619×10 | 6.6619×10 | 6.3182×10 | 外螺纹首圈齿根 | 5.5193×107 | |||
| 0.1 | 1.0270×10 | 8.8721×10 | 8.1753×10 | 1.3983×10 | 1.2552×10 | 缺陷底部 | 1.7442×107 | 68.4 |
| 0.5 | 1.1359×10 | 9.4884×10 | 9.8704×10 | 1.8702×10 | 1.4081×10 | 1.1585×107 | 79.0 | |
| 1.0 | 1.2493×10 | 9.9662×10 | 9.9505×10 | 2.5271×10 | 1.7591×10 | 9.8881×106 | 82.1 | |
| 1.5 | 1.3666×10 | 1.0133×10 | 1.1382×10 | 3.5325×10 | 1.8002×10 | 6.6124×106 | 88.0 | |
| 1.8 | 1.4565×10 | 1.0602×10 | 1.1674×10 | 3.9627×10 | 1.8811×10 | 4.8885×106 | 91.1 | |
| 2.0 | 1.4822×10 | 1.0801×10 | 1.2553×10 | 4.0212×10 | 1.9090×10 | 4.3606×106 | 92.1 | |
| 2.3 | 1.7829×10 | 1.1703×10 | 1.3352×10 | 6.1261×10 | 2.1381×10 | 2.8884×106 | 94.8 |
Tab.11 Summary table of equivalent strain-fatigue life data at different defect depths
| 缺陷深度/mm | 峰值总应变εtotal | 峰值弹性应变εelmax | 弹性应变 幅值Δεel | 峰值塑性应变εplmax | 塑性应变 幅值Δεpl | 疲劳位置 | 疲劳寿命 | 降低率/% |
|---|---|---|---|---|---|---|---|---|
| 无缺陷 | 6.6619×10 | 6.6619×10 | 6.3182×10 | 外螺纹首圈齿根 | 5.5193×107 | |||
| 0.1 | 1.0270×10 | 8.8721×10 | 8.1753×10 | 1.3983×10 | 1.2552×10 | 缺陷底部 | 1.7442×107 | 68.4 |
| 0.5 | 1.1359×10 | 9.4884×10 | 9.8704×10 | 1.8702×10 | 1.4081×10 | 1.1585×107 | 79.0 | |
| 1.0 | 1.2493×10 | 9.9662×10 | 9.9505×10 | 2.5271×10 | 1.7591×10 | 9.8881×106 | 82.1 | |
| 1.5 | 1.3666×10 | 1.0133×10 | 1.1382×10 | 3.5325×10 | 1.8002×10 | 6.6124×106 | 88.0 | |
| 1.8 | 1.4565×10 | 1.0602×10 | 1.1674×10 | 3.9627×10 | 1.8811×10 | 4.8885×106 | 91.1 | |
| 2.0 | 1.4822×10 | 1.0801×10 | 1.2553×10 | 4.0212×10 | 1.9090×10 | 4.3606×106 | 92.1 | |
| 2.3 | 1.7829×10 | 1.1703×10 | 1.3352×10 | 6.1261×10 | 2.1381×10 | 2.8884×106 | 94.8 |
| 缺陷宽度/mm | 总应变εtotal | 峰值弹性应变εelmax | 弹性应变 幅值Δεel | 峰值塑性应变εplmax | 塑性应变 幅值Δεpl | 疲劳位置 | 疲劳寿命 | 降低率/% |
|---|---|---|---|---|---|---|---|---|
| 无缺陷 | 6.6619×10 | 6.6619×10 | 6.3182×10 | 外螺纹首圈齿根 | 5.5193×107 | |||
| 0.1 | 1.8506×10 | 1.2031×10 | 1.1154×10 | 6.4752×10 | 1.1604×10 | 缺陷 底部 | 7.1784×105 | 98.7 |
| 0.4 | 1.3827×10 | 1.0429×10 | 1.1350×10 | 3.3977×10 | 1.5242×10 | 3.4801×106 | 93.1 | |
| 0.8 | 1.3237×10 | 1.0233×10 | 1.1856×10 | 3.0041×10 | 1.5736×10 | 6.3923×106 | 88.4 | |
| 1.0 | 1.2494×10 | 9.9666×10 | 9.9542×10 | 2.5271×10 | 2.0578×10 | 9.8906×106 | 82.1 | |
| 1.3 | 1.2139×10 | 9.9605×10 | 9.2589×10 | 2.1781×10 | 2.0968×10 | 1.0906×107 | 80.2 | |
| 1.6 | 1.1355×10-2 | 9.4615×10 | 8.6766×10 | 1.8932×10 | 2.7901×10 | 1.3663×107 | 75.2 |
Tab.12 Summary table of equivalent strain-fatigue life data at different defect widths
| 缺陷宽度/mm | 总应变εtotal | 峰值弹性应变εelmax | 弹性应变 幅值Δεel | 峰值塑性应变εplmax | 塑性应变 幅值Δεpl | 疲劳位置 | 疲劳寿命 | 降低率/% |
|---|---|---|---|---|---|---|---|---|
| 无缺陷 | 6.6619×10 | 6.6619×10 | 6.3182×10 | 外螺纹首圈齿根 | 5.5193×107 | |||
| 0.1 | 1.8506×10 | 1.2031×10 | 1.1154×10 | 6.4752×10 | 1.1604×10 | 缺陷 底部 | 7.1784×105 | 98.7 |
| 0.4 | 1.3827×10 | 1.0429×10 | 1.1350×10 | 3.3977×10 | 1.5242×10 | 3.4801×106 | 93.1 | |
| 0.8 | 1.3237×10 | 1.0233×10 | 1.1856×10 | 3.0041×10 | 1.5736×10 | 6.3923×106 | 88.4 | |
| 1.0 | 1.2494×10 | 9.9666×10 | 9.9542×10 | 2.5271×10 | 2.0578×10 | 9.8906×106 | 82.1 | |
| 1.3 | 1.2139×10 | 9.9605×10 | 9.2589×10 | 2.1781×10 | 2.0968×10 | 1.0906×107 | 80.2 | |
| 1.6 | 1.1355×10-2 | 9.4615×10 | 8.6766×10 | 1.8932×10 | 2.7901×10 | 1.3663×107 | 75.2 |
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