金刚石砂轮磨削钛合金时的磨削力研究

冯茹

doi:10.13394/j.cnki.jgszz.2021.0120

金刚石砂轮磨削钛合金时的磨削力研究

doi: 10.13394/j.cnki.jgszz.2021.0120

冯茹^{1, 2,}

1.
长春汽车工业高等专科学校汽车运用学院, 长春 130013
2.
第一汽车集团教育培训中心, 长春 130013

基金项目: 吉林省科技发展计划项目（20190302099GX）。

详细信息

作者简介:
冯茹，女，1986年生，讲师。主要研究方向：汽车维修、机械加工。 E-mail: fengru1111@126.com

中图分类号: TG58;TG74;TQ164
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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-22
- 修回日期: 2021-11-15
- 刊出日期: 2022-05-27

Study on grinding force in grinding titanium alloy with diamond grinding wheel

FENG Ru^{1, 2
,}

1.
Automobile Application Department, Changchun Automobile Industry Institute, Changchun 130013, China
2.
Education and Training Center of China First Automobile Group Corporation, Changchun 130013, China

摘要

摘要: 为解决金刚石砂轮磨削钛合金时材料弹性模量低、弹性形变大等问题，从理论上对砂轮的受力状态进行分析。基于切屑分离准则和材料摩擦属性，构建钛合金磨削时的受力模型，并对单颗磨粒的受力状态进行有限元仿真。设计钛合金磨削加工试验，研究工艺参数变化对砂轮磨削力的影响规律。结果表明：砂轮磨削速度增加，磨削力逐渐降低；当进给速度和磨削深度增加时，磨削力增加。当磨削工艺参数改变时，砂轮的切向和法向磨削力的变化趋势大致相同，切向和法向磨削力的比值为0.29～0.37。且磨削力的理论值和试验值的变化趋势基本一致，二者相对误差的平均值在5%以内，验证了磨削力理论模型的正确性。
- 钛合金 /
- 有限元分析 /
- 磨削力 /
- 金刚石砂轮
Abstract: To solve the problems of low elastic modulus and large elastic deformation when grinding titanium alloy with diamond grinding wheel, the force of grinding wheel was analyzed theoretically. Based on the chip separation criterion and the material friction properties, the cutting force model of titanium alloy grinding was established, and the cutting force state of a single abrasive particle was simulated by finite element method. The grinding experiment of titanium alloy was designed to study the influences of process parameters on the grinding forces of grinding wheel. The results show that the grinding force decreases with the increase of grinding speed. When the feed rate and the grinding depth increase, the grinding forces increase. When the grinding process parameters are changed, the change trend of tangential and normal grinding forces of the grinding wheel is roughly the same, and the ratio of the tangential and the normal force is 0.29～0.37. The variation trend of the theoretical value of grinding force is basically consistent with the experimental value, and the average value of the relative error between the two is within 5%, which verifies the correctness of the theoretical model of grinding force.
- titanium alloy /
- finite element analysis /
- grinding force /
- diamond grinding wheel

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图 1 工件和磨粒的模型

Figure 1. Model of workpiece and abrasive

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图 2 模型网格划分

Figure 2. Meshing of the model

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图 3 单磨粒磨削钛合金工件的应力应变仿真云图

Figure 3. Stress-strain simulation nephograms of single abrasive grinding titanium alloy workpiece

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图 4 切削中磨粒与工件接触示意图

Figure 4. Schematic diagram of contact between abrasive particle and workpiece during cutting

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图 5 工件材料变形和微元处受力示意图

Figure 5. Schematic diagram of workpiece material deformation and force at micro-element

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图 6 磨削试验设备

Figure 6. Grinding test equipment

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图 7 动态磨削力信号

Figure 7. Dynamic grinding force signals

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图 8 磨削力试验值和理论值对比

Figure 8. Comparison of experimental and theoretical grinding forces

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表 1 钛合金J-C本构模型参数

Table 1. J-C constitutive model parameters of titanium alloy

参数	取值
A	875
B	793
C	0.011
n	0.386
m	0.71

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表 2 模型验证试验参数及磨削力值

Table 2. Model verification test parameters and grinding force values

组别	因素			结果
组别	磨削速度 v_s (m·min⁻¹)	进给速度 v_w (mm·min⁻¹)	磨削深度 h / μm	法向力试验值 F_NS / N	切向力试验值 F_TS / N
1	16	50	30	35.4	10.1
2	32	50	30	17.9	5.9
3	24	30	30	15.1	5.4
4	24	70	30	32.2	9.7
5	24	50	10	14.5	4.5
6	24	50	50	50.0	16.7

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表 3 未知参数

Table 3. Unknown parameters

参数	取值
k	3.667
γ	22.981
ξ	0.357

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表 4 单因素试验参数

Table 4. Single factor test parameters

组别	磨削速度 v_s / (m·min⁻¹)	进给速度 v_w / (mm·min⁻¹)	磨削深度 h / μm
1	16	50	30
2	20	50	30
3	24	50	30
4	28	50	30
5	32	50	30
6	24	30	30
7	24	40	30
8	24	50	30
9	24	60	30
10	24	70	30
11	24	50	10
12	24	50	20
13	24	50	30
14	24	50	40
15	24	50	50

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表 5 钛合金磨削时的磨削力试验值和理论值

Table 5. Experimental and theoretical values of grinding forces during titanium alloy grinding

组别	法向力试验值 F_NS / N	切向力试验值 F_TS / N	轴向力试验值 F_AS / N	法向力理论值 F_NL / N	切向力理论值 F_TL / N	法向力相对误差 δ_N / %	切向力相对误差 δ_T / %
1	34.5	10.5	0.3	32.5	10.8	6.2	2.8
2	29.2	9.7	0.6	27.5	9.2	6.2	5.4
3	23.3	7.9	0.4	23.1	7.7	0.9	2.6
4	20.5	6.8	0.3	21.1	7.0	2.8	2.9
5	18.1	6.2	0.3	19.7	6.6	8.1	6.1
6	15.2	5.3	0.7	16.2	5.4	6.2	1.9
7	18.9	6.3	0.6	19.6	6.5	3.6	3.1
8	23.3	7.9	0.4	23.1	7.7	0.9	2.6
9	28.0	9.3	0.7	26.5	8.8	5.7	5.7
10	32.4	9.5	0.8	30.0	10.0	8.0	5.0
11	14.6	4.6	0.5	15.5	5.1	5.8	9.8
12	18.3	6.9	0.5	19.1	6.4	4.2	7.8
13	23.3	7.9	0.4	23.1	7.7	0.9	2.6
14	35.7	11.2	1.1	33.7	11.0	5.9	1.8
15	50.2	16.9	0.9	47.9	16.0	4.8	5.6
平均值						4.7	4.4

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