四柱压机的精密压制技术

冯克明; 王庆伟; 杜晓旭; 贾伟民; 夏学锋

doi:10.13394/j.cnki.jgszz.2022.0215

四柱压机的精密压制技术

doi: 10.13394/j.cnki.jgszz.2022.0215

1.
郑州磨料磨具磨削研究所有限公司, 郑州 450001
2.
中国机械工业国际合作有限公司, 郑州 450018

基金项目: 河南省重大科技专项（221100230300）；郑州市重大科技专项（2021KJZX0062）

详细信息

作者简介:
冯克明，男，1962年生，国务院特殊津贴专家、教授级高级工程师。主要研究方向：磨削技术、磨削工具制造及应用。E-mail：smfengkeming@163.com

中图分类号: TG3; TG74; TH16
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- 被引次数: 0
出版历程
- 收稿日期: 2022-12-12
- 修回日期: 2023-02-27
- 录用日期: 2023-03-07
- 刊出日期: 2023-06-20

Precision pressing technology of four-column press

1.
Zhengzhou Research Institute for Abrasive & Grinding Co., Ltd., Zhengzhou 450001, China
2.
China Machinery Industry International Cooperation Co., Ltd., Zhengzhou 450018, China

摘要

摘要:
为提高砂轮成形精度，对其用四柱压机的压制方式进行调研、检测、梳理、分析，发现传统压机压制时普遍存在三心不同轴、压力易偏载、导向不均匀现象。对此，基于力的直线传递原理，提出力心压制新方案，制作新式试验压机并进行压制试验。新压机去除了四柱导向功能，提高了系统刚性，重新确定了力心位置等，且全面消除了所有附加力矩的干涉。砂轮批量成型试验结果发现：砂轮毛坯厚度差降低了10.3%～16.5%；力心压制方式明显优于传统压机压制方式，适于小尺寸制品的近净尺寸成形。
- 四柱压机 /
- 力心压制 /
- 模压成形 /
- 偏载 /
- 精度
Abstract:
In order to improve the forming accuracy of grinding wheel, the pressing method of the four-column press for grinding wheel was investigated, tested, carded and analyzed. It was found that the traditional press generally had the phenomena of three centers with different shafts, easy unbalance loading pressure and uneven guidance during pressing. Based on the principle of linear transmission of force, a new scheme of pressure-center pressing was proposed, and a new test press was made and subjected to pressing tests. The new press removes the four-column guiding function, improves the system rigidity, redefines the position of the pressure-center, and completely eliminates the interference of all additional moments. The results of the batch forming test of grinding wheel show that the thickness difference of grinding wheel blank is reduced by 10.3% to 16.5%. The pressure-center pressing method is obviously superior to the traditional press pressing method, and is suitable for the near-net-size forming of small size products.
- four-column press /
- pressing technology of pressure center /
- molding /
- eccentric load /
- precision

HTML全文

图 1 下压式四柱油压机

Figure 1. Downward pressure four-column hydraulic press

下载: 全尺寸图片幻灯片

图 2 压机压制精度因素分析

Figure 2. Analysis of precision factors of press pressing

下载: 全尺寸图片幻灯片

图 3 四柱压机模具偏载受力示意图

Figure 3. Schematic diagram of the force exerted on the mold in the four column press under eccentric load

下载: 全尺寸图片幻灯片

图 4 四柱压机导向工作台受力示意图

Figure 4. Schematic diagram of the force exerted on the guiding table in the four column press

下载: 全尺寸图片幻灯片

图 5 100 T新压机照片

Figure 5. Photo of 100 T new press

下载: 全尺寸图片幻灯片

图 6 压机工作台及附件

Figure 6. Press table and accessories

下载: 全尺寸图片幻灯片

图 7 偏载距对压块厚度差的影响

Figure 7. Influence of eccentric load distance on thickness difference of compacts

下载: 全尺寸图片幻灯片

图 8 砂轮毛坯厚度差分布图

Figure 8. Time distribution diagram of wheel blank thickness difference

下载: 全尺寸图片幻灯片

表 1 2种压制方式测试数据对比

Table 1. Comparison of test data of two pressing methods

序号	操作工情况	时序	新压机		传统压机		均值同比 R / %
序号	操作工情况	时序	数量 n₁ / 片	厚度差均值 d₂ / μm	数量 n₂ / 片	厚度差均值 d₃ / μm	均值同比 R / %
1	在岗半年员工	1	292	7.10	16	8.50	16.5
2	在岗2年员工1	1	23	5.74	62	6.76
		2	81	6.02	61	6.23
		3	66	5.58	58	6.12
		4	66	5.98
		5	66	5.83
		6	71	5.41
		7	63	5.35
		合计	436		181
		加权平均		5.72		6.38	10.3
3	在岗2年员工2	1	73	5.48	63	5.95
		2	65	5.00	43	6.72
		3	67	5.78	41	6.29
		4			77	6.27
		5			77	6.42
		6			46	6.22
		合计	205		347
		加权平均		5.42		6.30	14.0

下载: 导出CSV

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