共查询到18条相似文献,搜索用时 171 毫秒
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数控等离子切割机本是较为精确的胚料加工设备,它应为后序加工减少加工余量提供有力的保证。我厂数控等离子切割机在使用初期,工件切割面粗糙度达到12-5,切口角(理论切割面与实际切割面之间的角度)接近5°,即使是厚度达25mm的铝件,切割面粗糙度也可达到25,切口角接近10°。随着车间操作工人的使用,设备却出现了一些问题。1 出现的问题1-1 切口质量差(1)切口角增大,约30°;(2)表面粗糙,达不到设备使用初期的水平。1-2 易耗件(参见割炬结构简图)损坏严重(1)新的涡流环安装一次就损坏;(… 相似文献
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一、前言上海电焊机厂与上海第二纺织机械厂合作研制成功的LG—100型小功率等离子弧切割机,在上海第二纺织机械厂进行了生产考核,经鉴定认为:该切割机体积小、重量轻、切口窄、质量好,达到了节约能源、减少材料消耗、改善劳动条件和环境卫生的目的。解决了小功率等离子弧切割的一些技术 相似文献
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《机械制造文摘:焊接分册》2010,(3):42-43
低碳钢薄板氧-乙炔火焰手工气割工艺研究,天然气切割技术在船舶建造业中的推广应用,一种新型数字化逆变式等离子切割电源,提高等离子切割机切割质量的方法,数控激光切割机光路补偿措施的探讨…… 相似文献
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数控等离子弧切割工艺 总被引:2,自引:0,他引:2
数控等离子弧切割是一种先进的热切割技术,结合所研制成功的数控火焰/等离子弧切割机分析了等离子弧切割工艺、切割工艺方法、工艺参数的选择及调整、切割后工件质量和常见的切割问题及产生原因。 相似文献
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为研究切割电流、切割速度、工件厚度和有效加热半径对低合金钢电弧切割质量的影响,建立了基于ANSYS概率设计系统的电弧切割参数敏感性分析模型.以低合金钢2Cr13为研究对象,通过施加移动高斯热源模拟电弧切割过程,研究了工件温度场和应力场随各参数的变化规律.采用响应面概率设计方法分析了温度场和应力场对各切割参数的敏感性,结果表明,切割电流和切割速度对电弧切割质量影响较大,有效加热半径和工件厚度影响较小;切割电流和工件厚度对温度场为正影响,切割速度和有效加热半径对温度场为负影响;切割电流、工件厚度和有效加热半径对应力场是正影响,切割速度对应力场是负影响.文中模型对低合金钢电弧切割工艺设计具有重要的借鉴和指导意义. 相似文献
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数控等离子弧切割是一种经济、实用、高效的先进热切割技术.在数控等离子弧切割工艺参数中,许多参数相互耦合,影响切割质量与切割效率,因此,切割参数的选择及控制是一个重要的问题.通过对数控等离子弧切割的加工工艺进行分析,对等离子弧切割的空载电压、弧柱电压、切割电流、切割速度、工作介质及流量、喷嘴距工件的高度、喷孔直径、电极内... 相似文献
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SeongMin Son HanSeok Lim JungHwan Ahn 《International Journal of Machine Tools and Manufacture》2006,46(15):2066-2072
In the ultra-precision diamond cutting process, the rake angle of the tool becomes negative because the edge radius of a tool is considerably larger compared to the sub-micrometer depth of the cut. The effects of plowing due to the large negative rake angle result in an unstable cutting process without continuous chip. For this reason, it is important to determine minimum cutting thickness in order to enable greater machining accuracy to be obtained by fine and stable machining. It was previously reported that the critical depth of cut with a continuous chip was determined by the tool sharpness and the friction coefficient between a workpiece and a tool [S.M. Son, et al., Effects of the friction coefficient on the minimum cutting thickness in micro cutting, International Journal of Machine Tools and Manufacture 45 (2005) 529–535]. For the same edge radius of a tool, the higher the friction coefficient of the tool–workpiece, the thinner the minimum cutting thickness becomes. Therefore, it is believed that increasing the friction coefficient by a physical method would be effective to achieve thinner stable cutting. In this study, the possibility of reducing the minimum cutting thickness was investigated through changing the friction coefficient of a tool–workpiece. The vibration cutting method is applied to increase the friction coefficient. Experimental results show that the cutting technology is efficient for increasing the friction coefficient and decreasing the minimum cutting thickness. The minimum cutting thickness was reduced by about 0.02–0.04 μm depending on materials and vibration conditions. 相似文献
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Yoshihiro Yamaguchi Yusuke Katada Takeru Itou Yoshihiko Uesugi Yasunori Tanaka Tatsuo Ishijima 《Welding International》2013,27(10):745-753
Oxygen plasma arc cutting (PAC) is widely used in various industrial fields. In the case of cutting magnetized plates, the magnetic field is concentrated around the cutting front according to the progress of the cutting, and the electromagnetic force induced by leakage magnetic field deflects the plasma jet. The deflected plasma jet causes poor cutting quality and sometimes causes fatal damage on the electrode and the nozzle by a double arc as abnormal discharge. This phenomenon is called magnetic arc blow, and it is a critical issue of applying plasma cutting on magnetized plates. The purpose of this study is to investigate the arc blow behaviour and to devise a method to prevent it. We examined the relationship between operating conditions and double arc with external magnetic fields on the plasma jet. We found criteria of operation conditions that induce the arc blow. In addition, we have succeeded in suppressing the double arc generation attributed to the external magnetic field with a mild steel shield cap attachment around the nozzle tip. 相似文献
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采用等离子切割钢板时,由于等离子切割弧的形状不规则,在切割过程中等离子弧并不垂直于钢板表面,钢板上层先于下层被切割,直角零件常被切割成圆角零件,导致零件切割质量不合格。现对原有工艺进行改善,等割零件一次交检合格率提升至95%,减少了手工打磨时间,零件生产效率提高20%。 相似文献
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基于PLC的剪板机控制系统设计 总被引:1,自引:0,他引:1
熊幸明 《组合机床与自动化加工技术》2002,(12):68-69,71
在分析剪板机结构、原理的基础上,设计了控制系统的硬件电路和软件程序。通过引入计算机作上位机,对生产现场的设备状态实施监控和对现场参数进行调整,使设备处于最佳工作状态。 相似文献