恒压力下弯管内壁除锈磨块设计及仿真分析

李登超; 张平宽; 李顺顺

doi:10.13394/j.cnki.jgszz.2021.0118

恒压力下弯管内壁除锈磨块设计及仿真分析

doi: 10.13394/j.cnki.jgszz.2021.0118

太原科技大学机械工程学院, 太原 030024

基金项目: 国家自然科学基金（51475317）。

详细信息

作者简介:
张平宽，男，1964年生，博士、硕士研究生导师、教授。主要研究方向：先进制造技术。E-mail: 814792557@qq.com

中图分类号: TG74.9
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- 被引次数: 0
出版历程
- 收稿日期: 2021-10-24
- 修回日期: 2021-12-16
- 刊出日期: 2022-05-27

Design and simulation analysis of rust removal grinding block on inner wall of elbow at constant pressure

School of Mechanical Engineering Industry Information Department, Taiyuan University of Science and Technology, Taiyuan 030024, China

摘要

摘要: 为除去弯管内壁在涂层前的锈层，设计3种能够作用于100 mm直径弯管的除锈用磨块（分别为磨块A、磨块B和磨块C），并对磨块进行除锈仿真来分析弯管弯曲处内壁的锈层的去除效果。通过理论计算得出3种磨块的尺寸。磨块的凹弧半径范围为65.130～74.556 mm，凹弧圆心角范围为6.97°～7.98°，凸弧半径范围为145.522～147.618 mm，凸弧圆心角范围为6.06°～6.15°。磨块上的磨粒材料选用白刚玉。利用Solidworks和Creo进行建模并导入Abaqus中进行仿真分析，在仿真过程中要保证磨块对弯管弯曲处内管壁的压力恒定。结果表明：磨块B对弯管内壁的磨削达到稳定后，凹弧磨削深度的范围为0.045～0.053 mm，平均值为0.0498 mm，算术平均偏差为0.0016 mm；磨粒率为38%的凸弧磨削深度的算术平均偏差为2.2×10⁻⁴ mm。经数据分析，磨块B的磨削比其他2种磨块的磨削稳定，其除锈效果最好。
- 恒压力 /
- 弯管 /
- 除锈 /
- 有限元仿真
Abstract: To remove the embroidery layer on the inner wall of the elbow before coating, three kinds of grinding blocks, namely Block A, Block B and Block C, were designed to act on the 100-mm-diameter elbow. The removal result of the embroidery layer on the inner wall of the elbow bend was analyzed by using the grinding block for rust removal simulation. Firstly, the sizes of three kinds of grinding blocks were obtained by theoretical calculation. The radius and the center angle of concave arc of the block were 65.130~74.556 mm and 6.97°~7.98°, while those of convex arc were 145.522~147.618 mm and 6.06°~6.15°. The abrasive material on the grinding block was white corundum. Then, Solidworks and Creo were used for modeling and imported into Abaqus for simulation analysis. In the simulation process, it is necessary to ensure that the pressure of the grinding block on the inner wall of the elbow bend is constant and equal. Results show that when the grinding on the inner wall of the elbow by the grinding block B is stable, the range of the concave-arc grinding depth is 0.045 0～0.053 0 mm, whose average value is 0.049 8 mm and arithmetic average deviation is 0.001 6 mm. The arithmetic mean deviation of convex arc grinding depth with 38% abrasive rate is 2.2 × 10⁻⁴ mm. After data analysis, grinding stability of Block B is better than that of other two grinding blocks. It can be concluded that the rust removal effect of Block B is the best.
- constant pressure /
- elbow pipe /
- rust removal /
- finite element simulation

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图 1 机构等轴侧图

Figure 1. Isoaxial side diagram of mechanism

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图 2 弯管内壁下方磨削简图

Figure 2. Grinding diagram below inner wall of elbow

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图 3 弯管内壁上方磨削简图

Figure 3. Grinding diagram above inner wall of elbow

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图 4 仿真流程图

Figure 4. Simulation flow chat

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图 5 凹弧段网格划分

Figure 5. Meshing of concave arc segment

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图 6 弯管底部内壁除锈仿真模型

Figure 6. Simulation model of inner wall rust removal at bottom of elbow

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图 7 压力与切深点线图

Figure 7. Pressure and cutting depth dot plot

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图 8 磨块除锈深度曲线

Figure 8. Derusting depth curve of grinding block

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图 9 凸弧段除锈深度曲线

Figure 9. Derusting depth curve of convex arc segment

下载: 全尺寸图片幻灯片

表 1 磨块的参数

Table 1. Parameters of grinding block

名称	凹弧
名称	半径${r_1}$ / mm	横坐标 $i$/ mm	纵坐标 $j$/ mm	磨削面积 ${S_1}$ / mm²
磨块A	65.130	9.312	9.312	0.234
磨块B	69.524	12.427	12.427	0.301
磨块C	74.556	15.992	15.992	0.364

名称	凸弧
名称	半径${r_2}$/ mm	横坐标 $i'$ / mm	纵坐标$j'$ / mm	磨削面积 ${ S_2}$ / mm²
磨块A	147.618	3.127	3.127	0.727
磨块B	146.563	3.880	3.880	0.905
磨块C	145.522	4.623	4.623	1.058

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表 2 压力与磨削深度数据

Table 2. Pressure and grinding depth data

序号	压力 $F$ / N	切深 ${a_{\rm{p}}}$ / mm
1	200	0.038
2	250	0.043
3	300	0.048
4	350	0.053
5	400	0.055
6	450	0.060
7	500	0.063
8	550	0.065
9	600	0.068
10	650	0.070
11	700	0.073
12	750	0.075

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表 3 平均值与算术平均值

Table 3. Average and arithmetic average

类型	平均值 $a$ / mm	算术平均值 $d$ / mm
磨块A磨粒率38%	3.7×10⁻³	2.5×10⁻⁴
磨块A磨粒率40%	3.8×10⁻³	3.4×10⁻⁴
磨块A磨粒率42%	4.0×10⁻³	2.7×10⁻⁴
磨块B磨粒率38%	5.3×10⁻³	2.2×10⁻⁴
磨块B磨粒率40%	5.6×10⁻³	3.7×10⁻⁴
磨块B磨粒率42%	6.0×10⁻³	3.4×10⁻⁴
磨块C磨粒率38%	7.2×10⁻³	4.1×10⁻⁴
磨块C磨粒率40%	7.5×10⁻³	4.2×10⁻⁴
磨块C磨粒率42%	7.6×10⁻³	3.8×10⁻⁴

下载: 导出CSV

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