送丝

Therefore, uniform and stable arc welding wire feed is to ensure that an important condition for quality.

因此，均匀稳定的送丝是保证弧焊质量的一个重要条件。

Based on SG3525A PWM control circuit and the study, based on the design of the hardware structure of wire.

本文在对PWM控制电路及SG3525A的研究基础上，设计的送丝硬件结构。

It has mainly actions as follows: accumulating steel wire; sending steel wire; drawing steel wire; clipping; tighten; squeezing flat; regulating position of strapper, etc; using annealed rod of φ6.5,φ6.0 or hot-finished rod ofφ6.0 directly as strapping steel wire; it straps and tightens for 720°,and then squeezing flat to make sure that it straps firm and not easily loose.

它具有如下主要动作：蓄丝、送丝、抽丝、剪断、拧紧、挤平、打捆机位置调节等；使用φ6.5，φ6.0的退火盘条或直接采用φ6.0的热轧盘条作捆丝；其捆结拧紧720°，然后挤平，保证了捆结牢固，不易松脱。

Wire feed speed, through the next adjustment of welding current regulator, the wire diameter is too small to accommodate Easily broken, so please slow adjustment.

送丝的速度，可以通过旁边的焊接电流调节器调整，丝径太细的，容易折断，所以请低速调节。

The companies design and manufacture molds, wire feed welding machine and accessories company is Sino-foreign joint ventures, trade associations governing units welding machine, welding machine wire feeding device is the national standard drafting unit.

本公司设计制造模具，焊接用送丝机及配件我公司是中外合资企业，电焊机行业协会理事单位，是电焊机送丝装置国家标准起草单位。

The series of computerized automatic welder for portal ring seam is applicable for both of wire-drive and butt-weld ring seams at M direction for various casket cylindrical metal materials with plate thickness of 0.8mm~2.5mm and lmm8mm, due to silver or golden welding seam, beautiful and clear appearance, high strength, continuous and stepless weld-speed regulating and non corrosion in crystalline, this equipment is mainly suitable for ring-seam butt-weld to SS compressing components and various inners concerning solar water heater, enamel water container, electric heater and turkey boiler, and for ring-seam wire-drive and butt-weld to barrel and tank for large industry production.

该系列龙门式环缝电脑自动焊接设备可对板厚0.8mm—2.5mm和1mm—8mm的各种圆桶形金属件实施M向位置的环缝对接和送丝焊接，为两用型设备。焊缝颜色呈银白色或金黄色，焊接美观光洁、强度高、无晶间腐蚀，焊接速度连续无级可调，主要适用于不锈钢承压或太阳能热水器内胆、搪瓷水箱内胆、电热水器内胆、火鸡锅和对大型工业制桶、罐等产品的环缝对接、送丝焊接。

Compared the voltage negative feedback wire-feeding speed regulation system supported by current positive feedback with the rotational speed negative feedback regulation system, the equivalent condition of the two systems is obtained. Then, a wire-feeding speed regulation circuit for the CO_2 welding machine is designed based on TL494 chip, which has the self-protective function under the condition of current overloading.

通过对电压负反馈配合电流正反馈的送丝调速系统与转速负反馈调速系统的比较，得出了这两种调速系统的等效条件，并采用电压负反馈配合电流正反馈技术，设计了一种以TL494为核心的具有过电流截止保护功能的CO_2焊机送丝调速电路。

The relationships between welding pool width, wire extension and welding parameters including welding current duty ratio, base current, peak current, welding speed and wire-feeding speed were studied. Through large numbers of welding experiments, aluminum alloy pulsed MIG welding dynamic process were identified by the curve fitting method, and the mathematical models between welding current duty ratio, base current, welding speed, wire-feeding speed and wire extension were obtained, succeeding the model between the above parameters and weld pool width.

介绍了铝合金MIG焊焊接电流占空比、基值电流、峰值电流、焊接速度、送丝速度对熔宽的影响规律，并在其基础上，通过平板堆焊试验研究了这些参数对焊接干伸长的影响规律；在铝合金机器人脉冲MIG焊平板堆焊过程各焊接参数与正面熔宽之间的传递函数的基础上，采用铝合金平板堆焊阶跃试验，利用曲线拟合法辨识了铝合金机器人脉冲MIG焊动态过程传递函数，建立了焊接电流占空比、基值电流、焊接速度、送丝速度与焊接干伸长之间的对象数学模型。

A new type of wire-feed system of submerged arc welding based on fuzzy logic control is proposed, which replaces the conventional PI controller.

以埋弧焊送丝系统为研究对象，用模糊控制器取代传统的基于系统模型的经典PI调节器，设计了一种新型的模糊控制送丝系统。

The wire-feed speed control system based on negative feedback of speed is designed. The test proves that the performance of this system has been noticeably improved than the common systems. The system can be output steadily under the factors of wire-feed resistance changing or certain different performance of motors, and this system is the base for the further improving of the quality of the pulse MIG welding.

本文设计了基于速度负反馈的送丝调速系统，实验证明该系统的性能较一般系统有了明显的提高，在送丝阻力变化、电网波动或电机性能存在一定差异的情况下，该系统均可以稳定输出，为进一步提高脉冲MIG焊接工艺质量打下了基础。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。