中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2014年
12期
1672-1675
,共4页
等离子电弧加热成形%金属薄板%弯曲精度%弯曲效率
等離子電弧加熱成形%金屬薄闆%彎麯精度%彎麯效率
등리자전호가열성형%금속박판%만곡정도%만곡효솔
plasma arc forming%sheet metal%bending precision%bending efficiency
为了实现等离子电弧加热的精确弯曲成形，采用等离子电弧沿直线对1Cr18Ni9Ti 不锈钢板材进行加热弯曲成形试验，并用 CM OS1303uc 数字相机等硬件和相关软件在等离子电弧加热弯曲成形的过程中对弯曲角度进行实时检测，实现了对成形过程的闭环控制。试验结果表明：当扫描次数较少时，板材弯曲角度随扫描次数增加近似呈线性增大；当扫描次数较多时，由于增厚效应的影响，单次扫描弯曲角度的增量会不断减小，弯曲效率明显降低。为了确保加工过程的可靠性并提高成形效率，根据加工余量的不同将成形过程分为粗、中、精三个加工阶段，各个阶段分别采用不同的工艺参数进行加工，通过弯曲角度分别为20°和30°的不锈钢薄板的成形试验验证了该方法的有效性。
為瞭實現等離子電弧加熱的精確彎麯成形，採用等離子電弧沿直線對1Cr18Ni9Ti 不鏽鋼闆材進行加熱彎麯成形試驗，併用 CM OS1303uc 數字相機等硬件和相關軟件在等離子電弧加熱彎麯成形的過程中對彎麯角度進行實時檢測，實現瞭對成形過程的閉環控製。試驗結果錶明：噹掃描次數較少時，闆材彎麯角度隨掃描次數增加近似呈線性增大；噹掃描次數較多時，由于增厚效應的影響，單次掃描彎麯角度的增量會不斷減小，彎麯效率明顯降低。為瞭確保加工過程的可靠性併提高成形效率，根據加工餘量的不同將成形過程分為粗、中、精三箇加工階段，各箇階段分彆採用不同的工藝參數進行加工，通過彎麯角度分彆為20°和30°的不鏽鋼薄闆的成形試驗驗證瞭該方法的有效性。
위료실현등리자전호가열적정학만곡성형，채용등리자전호연직선대1Cr18Ni9Ti 불수강판재진행가열만곡성형시험，병용 CM OS1303uc 수자상궤등경건화상관연건재등리자전호가열만곡성형적과정중대만곡각도진행실시검측，실현료대성형과정적폐배공제。시험결과표명：당소묘차수교소시，판재만곡각도수소묘차수증가근사정선성증대；당소묘차수교다시，유우증후효응적영향，단차소묘만곡각도적증량회불단감소，만곡효솔명현강저。위료학보가공과정적가고성병제고성형효솔，근거가공여량적불동장성형과정분위조、중、정삼개가공계단，각개계단분별채용불동적공예삼수진행가공，통과만곡각도분별위20°화30°적불수강박판적성형시험험증료해방법적유효성。
In order to achieve precision bending of sheet metal using the plasma arc ,forming exper-iments were carried on the sheet metal of 1Cr18Ni9Ti .The CM OS1303uc digital cameras and related software were used to detect the bending angle ,and a closed-loop control of the forming process was established according to the detection .The experimental results show that :when the scanning number is small ,the plate bending angle will be linearly increased with the increase of the scanning number . When the scanning number becomes more and more ,due to thickening effect ,this scanning increment of bending angle will be decreased continuely ,and the bending effectiveness reduced significantly .In order to ensure the reliability of the machining process and improve the forming efficiency ,the forming process was divided into three stages according to the forming margin ,and different process parame-ters were determined in different stages .The effective of the method was verified by the forming of bending angles 20° and 30°respectively for stainless steel sheet .
