宁波大学学报（理工版）
寧波大學學報（理工版）
저파대학학보（리공판）
JOURNAL OF NINGBO UNIVERSITY(NSEE)
2014年
3期
103-107
,共5页
无料头%辊剪制坯%堆料%挡块
無料頭%輥剪製坯%堆料%擋塊
무료두%곤전제배%퇴료%당괴
non-stub-bar%roll-cutting billet%stacking%stop block
为解决辊剪工艺中的端面堆料缺陷，实现楔横轧无料头轧制，运用DEFORM-3D软件建立了辊剪制坯的有限元模型，通过位移法阐明了辊剪过程中堆料缺陷的产生机理，并通过改变工艺参数和创新模具设计的方法来抑制堆料，提高坯料端面的成形质量。结果表明：在设备功耗范围内，堆料值随着轧辊旋转速度的减小而减小，随着进给速度的增大而降低；在模具外圆周处添加挡块能有效地消除堆料缺陷。该研究结果为完善辊剪制坯工艺，实现楔横轧无料头轧制提供了技术支持和理论依据。
為解決輥剪工藝中的耑麵堆料缺陷，實現楔橫軋無料頭軋製，運用DEFORM-3D軟件建立瞭輥剪製坯的有限元模型，通過位移法闡明瞭輥剪過程中堆料缺陷的產生機理，併通過改變工藝參數和創新模具設計的方法來抑製堆料，提高坯料耑麵的成形質量。結果錶明：在設備功耗範圍內，堆料值隨著軋輥鏇轉速度的減小而減小，隨著進給速度的增大而降低；在模具外圓週處添加擋塊能有效地消除堆料缺陷。該研究結果為完善輥剪製坯工藝，實現楔橫軋無料頭軋製提供瞭技術支持和理論依據。
위해결곤전공예중적단면퇴료결함，실현설횡알무료두알제，운용DEFORM-3D연건건립료곤전제배적유한원모형，통과위이법천명료곤전과정중퇴료결함적산생궤리，병통과개변공예삼수화창신모구설계적방법래억제퇴료，제고배료단면적성형질량。결과표명：재설비공모범위내，퇴료치수착알곤선전속도적감소이감소，수착진급속도적증대이강저；재모구외원주처첨가당괴능유효지소제퇴료결함。해연구결과위완선곤전제배공예，실현설횡알무료두알제제공료기술지지화이론의거。
In order to remove the stacking defects on the end cross-section in the roll-cutting billet process and implement the cross wedge rolling without the stub bar, in this paper a roll-cutting billet finite element model is established using DEFORM-3D software. The forming mechanism of the stacking defects is clarified using the displacement method, and the forming quality of the billet end cross-section is improved through adjusting the process parameters and using the innovated mould to suppress the stacking. It is found that the stacking value decreases along with the decrease of the rotational velocity and the increase of the feed velocity. In addition, adding the stop block to the outer annulus in the mould proves to be an effective means to solve the problem of stacking defects. The proposed approach provides a technical support and a theoretical basis for further improving the roll-cutting billet process leading to the cross wedge rolling production without the stub bar.
