High Efficiency and High Precision Die Machining by Developments of both On-machine Correcting System of Tool Holder Deflection and Tool Holder with High Resistance to Chatter Vibration
通过开发刀架挠度机上修正系统和高抗颤振刀架,实现高效率、高精度模具加工
基本信息
- 批准号:15560096
- 负责人:
- 金额:$ 1.92万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2005
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
To realize both high-efficiency and high-precision die machining using machine tools, the studies have been made of tool holders having higher resistance to chatter vibration and an on-machine correcting system of tool holder deflection at higher spindle speed due to the imbalance of the spindle system composed of the spindle and holder. The chatter vibration resistance of the tool holder was evaluated by the product of the rigidity and damping ratio of the holder. The results are as follows.(1)A long tool holder having a damper within the tip to absorb vibration was developed and examined its effects on chatter vibration. Comparing with the results of the holder without damper, setting the damper resulted in both minute decrease in static bending rigidity of the holder and a 9 to 12 times increase in damping ratio, leading to the huge chatter vibration resistance(2)A tool holder was proposed which was made by connecting the taper shank of cast iron with the holder of alloy steel with diffusion welding. Comparing with the experimental results of the tool holder wholly made of alloy steel, the proposed tool holder had about 1.4 times chatter vibration resistance and equivalent cutting performance.(3)To increase the bending rigidity of the tool holder at higher spindle speed where large centrifugal forces act on the spindle and tool holder, a spindle system was proposed composing of the spindle of alumina ceramic which has smaller density and higher Young's modulus than those of steel and the tool holder of alloy steel. The numerical analyses revealed that the bending rigidity was increased and scarcely affected by the spindle speed.(4)A system was developed which may automatically correct the tool holder deflection at higher spindle speed by the measurements of the tool holder deflection at lower spindle speed.
为了实现机床的高效率和高精度模具加工,研究了具有更高抗颤振能力的刀柄以及在较高主轴转速下由于主轴和刀柄组成的主轴系统不平衡而导致的刀柄偏转系统的机上校正系统。刀柄的抗颤振性能通过刀柄刚性与阻尼比的乘积来评价。结果如下:(1)开发了一种在刀尖内装有阻尼器以吸收振动的长刀柄,并检验了其对颤振的影响。与不加阻尼器的刀柄结果相比,设置阻尼器导致刀柄静弯曲刚度略有下降,阻尼比增加9~12倍,从而产生巨大的抗颤振性能(2)提出了一种采用扩散焊将铸铁锥柄与合金钢刀柄连接而成的刀柄。与全合金钢刀柄的实验结果相比,所提出的刀柄具有约1.4倍的抗颤振性能和相当的切削性能。(3)为了提高主轴转速较高、主轴和刀柄作用有较大离心力时刀柄的弯曲刚度,提出了一种由密度更小、杨氏硬度更高的氧化铝陶瓷主轴组成的主轴系统。 模量高于钢和合金钢刀柄。数值分析表明,弯曲刚度得到提高,且几乎不受主轴转速的影响。(4)开发了一种系统,可以通过测量较低主轴转速下的刀架挠度来自动修正较高主轴转速下的刀架挠度。
项目成果
期刊论文数量(16)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
「研究成果報告書概要(欧文)」より
摘自《研究结果报告摘要(欧洲)》
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Yasushi Shigeri;Keiko Shimamoto
- 通讯作者:Keiko Shimamoto
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