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热镀锌方管钢制作成型的工艺特点

来源:http://www.jnxxjm.com

【 发布于:2019-03-13 14:54:06 】


直缝高频焊接大棚管具有工艺相对简单,快速连续消费的特性,在民用建筑、石化、轻工等部门有普遍用处。多用于保送低压流体或做成各种工程构件及轻工产品。

Longitudinal seam high frequency welding greenhouse pipe has the characteristics of relatively simple technology, rapid and continuous consumption, and is widely used in civil construction, petrochemical, light industry and other departments. It is mainly used to deliver low-pressure fluid or make various engineering components and light industrial products.

1.直缝高频焊接大棚管的消费工艺流程

1. Consumption process of straight seam high frequency welding greenhouse pipe

直缝焊接大棚管是经过高频焊接机组将一定的规格的长条形钢带卷成圆管状并将直缝焊接而成大棚管。大棚管的外形能够是圆形的,也能够是方形或异形的,它取决于焊后的定径轧制。焊接大棚管的资料主要是:低碳钢及σs≤300N/mm2、σs≤500N/mm2的低合金钢或其他钢材。热镀锌方管钢高频焊接的消费工艺流程如下:

Longitudinal welded greenhouse pipe is a kind of greenhouse pipe, which is made of long strip steel strip of certain specification coiled into circular pipe by high frequency welding machine. The shape of greenhouse pipe can be round or square or irregular, which depends on the sizing rolling after welding. The data of welded greenhouse pipes are mainly low carbon steel and low alloy steel with_s < 300N/mm2, _s < 500N/mm2 or other steels. The consumption process of high frequency welding of galvanized square pipe steel is as follows:

2.高频焊接

2. High Frequency Welding

高频焊接是依据电磁感应原理和交流电荷在导体中的趋肤效应、临近效应和涡流热效应,使焊缝边缘的钢材部分加热到熔融状态,经滚轮的挤压,使对接焊缝完成晶间接合,从而到达焊缝焊接之目的。高频焊是一种感应焊(或压力接触焊),它无需焊缝填充料,无焊接飞溅,焊接热影响区窄,焊接成型美观,焊接机械性能良好等优点,因而在大棚管的消费中遭到普遍的应用。

High frequency welding is based on the principle of electromagnetic induction and skin effect, proximity effect and eddy current heat effect of alternating current charge in conductor, so that the steel part of the weld edge is heated to the melting state, and through the extrusion of rollers, the butt weld can complete the crystal indirect joint, so as to achieve the purpose of weld welding. High frequency welding is a kind of induction welding (or pressure contact welding), which does not need filler, no welding spatter, narrow welding heat affected zone, beautiful welding shape, good welding mechanical properties, etc. It is widely used in the consumption of greenhouse pipes.

大棚管的高频焊接正是应用交流电的趋肤效应和临近效应,钢材(带钢)经滚压成型后,构成一个截面断开的圆形管坯,在管坯内靠近感应线圈中心左近旋转一个或一组阻抗器(磁棒),阻抗器与管坯启齿处构成一个电磁感应回路,在趋肤效应和临近效应的作用下,管坯启齿处边缘产生强大而集中的热效应,使焊缝边缘疾速加热到焊接所需温度经压辊挤压后,熔融状态的金属完成晶间接合,冷却后构成一条结实的对接焊缝。

The high frequency welding of greenhouse pipe is based on the skin effect and proximity effect of AC. After rolling forming, steel (strip steel) forms a circular tube blank with broken cross section. In the tube blank, one or a group of impedance (magnetic rods) rotates to the left near the center of induction coil. The impedance and the starting point of the tube blank form an electromagnetic induction circuit, under the skin effect and proximity effect. The edge of the billet teeth produces a strong and concentrated thermal effect, which makes the edge of the weld rapidly heated to the required temperature for welding. After extrusion by pressure roll, the molten metal completes the crystallization indirect bonding and forms a strong butt weld after cooling.

3.高频焊管机组

3. High Frequency Welded Pipe Unit

热镀锌方管钢的高频焊接过程是在高频焊管机组中完成的。高频焊管机组通常由滚压成型、高频焊接、挤压、冷却、定径、飞锯切断等部件组成,机组的前端配有储料活套,机组的后端配有大棚管翻转机架;电气局部主要有高频发作器、直流励磁发电机和仪表自动控制安装等组成。现以φ165mm高频焊管机组为例,其主要技术参数如下:

The high frequency welding process of galvanized square pipe steel is completed in the high frequency welding pipe set. High-frequency welded pipe unit is usually composed of rolling forming, high-frequency welding, extrusion, cooling, sizing, flying saw cutting and other components. The front end of the unit is equipped with storage loopers, and the back end of the unit is equipped with a greenhouse pipe overturning frame. The electrical part mainly consists of high-frequency generator, DC excitation generator and automatic instrument installation. The main technical parameters are as follows:

3.1 焊管废品

3.1 Waste Welded Pipe

圆管外径: φ111~165mm

Outer diameter of circular pipe: 111~165mm

热镀锌方矩管: 50×50~125×125mm

20171214420440.jpg

Hot-dip galvanized rectangular tube: 50 *50~125 *125 mm

矩形管: 90×50~160×60~180×80mm

Rectangular tube: 90 *50~160 *60~180 *80mm

废品管壁厚:2~6mm

Wall Thickness of Waste Product Tube: 2-6 mm

3.2 成型速度: 20~70米/分钟

3.2 Molding speed: 20-70 m/min

3.3 高频感应器:

3.3 High Frequency Inductors:

热功率: 600KW

Thermal power: 600KW

输出频率: 200~250KHz

Output frequency: 200-250KHz

电源: 三相380V 50Hz

Power supply: three-phase 380V 50Hz

冷却: 水冷

Cooling: water cooling

鼓励电压: 750~1500V

Encouraging Voltage: 750-1500V

4.高频鼓励电路

4. High Frequency Encouragement Circuit

高频鼓励电路(又称高频振荡电路),是由装置在高频发作器内的大型电子管和振荡槽路组成,它是应用电子管的放大作用,在电子管接通灯丝和阳极时,把阳极输出信号正反应到栅极,构成自激振荡回路。鼓励频率的大小取决于振荡槽路的电气参数(电压、电流、电容和电感)。

High-frequency excitation circuit (also known as high-frequency oscillation circuit) is composed of large electronic tubes and oscillation grooves installed in high-frequency attackers. It uses the amplification function of electronic tubes to activate the output signal of the anode to the grid when the tube is connected to the filament and the anode, thus forming a self-excited oscillation circuit. The magnitude of the excitation frequency depends on the electrical parameters (voltage, current, capacitance and inductance) of the oscillating groove.



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