First of all, the introduction of what is a fiber optic welding machine. Fiber optic welding machine is mainly used for the construction and maintenance of optical cable in optical communication. The general working principle is to use the high-pressure arc to melt the two fiber section at the same time with the high-precision motion mechanism of the gentle propulsion so that two fiber fusion into one, in order to achieve the coupling of the fiber mold field.

Then we introduce how to use the fiber optic welding machine:

1. Peel the fiber optic cable and secure the fiber optic cable to the disk fiber rack. Common optical cables have laminated, skeleton and central beam-type optical cables, different optical cables to take different methods of stripping, after peeling to secure the fiber optic cable to the disk fiber frame

2 The peeled fibers are passed through the heat shrinkable tube respectively. Different beam tubes, different colors of optical fiber to separate, through the heat shrinkage tube respectively.

3, open the welding machine power supply, choose the appropriate welding method. Fiber Optic welding Machine power supply mode generally has the adapter and the battery two kinds. Common types of optical fiber specifications are: mm Multimode fiber (ITU-TG.651), SM dispersion non-displacement single-mode fiber (ITU-TG.652), DS dispersion displacement single-mode fiber (ITU-TG.653), NZ non-0 dispersion displacement fiber (ITU-TG.655), bi bending fiber (ITU-TG.657), etc., to choose the appropriate welding method according to the type of fiber

4, the preparation of optical fiber end surface. The quality of the end surface of the fiber optic heat shrinkable tube will directly affect the weld mass, so the qualified end surface must be prepared before the weld. Use a special stripping tool to peel off the coating layer, and then with alcohol clean linen or cotton On the bare fiber wipe a few times, the use of fine cutting fiber cutting knife, 0.25mm (outer coating) fiber, cutting length of 8mm-16mm, 0.9mm (outer coating) fiber, cutting length can only be 16mm.

5, place the fiber. The optical fiber is placed in the V-groove of the welding machine, carefully pressed on the optical fiber pressure plate and optical fiber fixture, according to the fiber cutting length to set the position of the fiber in the pressure plate, and correctly put into the windshield.

6, the continuous fiber. After pressing the continuous key, the fiber moves in opposite directions, moving the process, resulting in a short discharge clean fiber surface, when the gap between the end of the fiber is suitable after the dissolving machine stops moving in opposite direction, sets the initial clearance, the weld machine measurement, and shows the cutting angle. After the initial clearance is set, the core or cladding alignment is started, then the weld reduces the gap (the final gap setting), the arc generated by the high voltage discharge melts the left fiber into the right fiber, and finally the microprocessor calculates the loss and displays the value on the monitor. If the estimated loss value is higher than expected, the discharge key can be discharged again, and the fuse will still calculate the loss after discharge

7, remove the fiber and use the heater double-walled heat shrinkable tube to reinforce the fiber fusion contact. Open the windshield, remove the fiber from the fuse, then move the heat shrinkable tube to the position of the melting point, heat it in the heater, and remove the fiber from the heater after heating. When operating, do not touch the ceramic portion of the heat shrinkable tube and heater due to the high temperature.

8, plate fiber and fixed. Will be the continuous fiber disk to the fiber optic host, fixed fiber optics, housing, connector box, terminal box, etc., the operation is completed.

The above is the application of heat shrinkable pipe in the optical fiber welding machine case, for the optical fiber industry, there is a fiber optic connection with the Heat shrinkable pipe, later for you to introduce its specific application.

Today, we use the general methods, steps, tools, and inspection items of the RF coaxial connector cable to find out where to use the heat shrinkable double-walled tube in the RF connector process for connecting soft cables and semi-rigid cables.

1. Mounting Tools

1.1 Soft Cable Crimping Tool

Cable matching soft Cable Press line clamp can be pressed diameter 2.5~10.5 mm soft wire cable. Suitable for all types of RF coaxial connectors using the above cables.

1.2 Semi-rigid cable mounting tool

Semi-rigid cable mounting tools are suitable for semi-rigid cables such as SMA RF coaxial connectors fitted with SFT-50-2 (RG405/U) and SFT-50-3 (RG402 high temperature heat shrinkable tube/U), and other types of RF coaxial connectors can be used with reference to the above tools when fitted with semi-rigid cables.

2. Mounting method and steps

2.1 Flexible Cable Mounting method

A. Stripping: Peel the line according to the size specified in the product drawings, use the stripping clamp tool or blade stripping line can be, but not damage the cable core line, internal and external insulation layer and shielding layer, at the same time ready to bring glue hot shrinkage double wall tube standby.

B. Welded Inner Conductor: Install the upper clamp and sheath sleeve, and weld the inner conductor to the cable core line with solder with a melting point of more than +125°C. Be careful not to burn the cable insulating layer.

C. crimping external conductor: Use the wire clamp to clamp the line clamp into six square, so that the cable shielding and external conductor good contact.

D. Install the hot-shrinkable double-walled tube: the hot air is blown evenly with a hairdryer gun, and the double-walled tube shrinks with the apparent heat shrinkage.

2.2 Semi-Rigid cable mounting method and steps

A. Stripping: Peel the wire with A lathe or special tool according to the drawing and stripping dimensions.

B. Solder: Solder welded external conductors with a melting point of more than +150°C should be used, and the melting point +125°C above the solder welded inner conductor.

3. Check the project

Installed cable components should do contact resistance, insulation resistance, dielectric pressure test, check if there is no bare wire leakage, the interface need to heat shrinkage double-walled tube seal protection.

热缩管运用于光纤熔接机及射频同轴连接器

首先介绍一下什么是光纤熔接机。光纤熔接机主要用于光通信中光缆的施工和维护。一般工作原理是利用高压电弧将两光纤断面熔化的同时用高精度运动机构平缓推进让两根光纤融合成一根，以实现光纤模场的耦合。

接着我们介绍一下光纤熔接机的使用方法：

1、开剥光缆，并将光缆固定到盘纤架上。常见的光缆有层绞式、骨架式和中心束管式光缆，不同的光缆要采取不同的开剥方法，剥好后要将光缆固定到盘纤架

2将剥开后的光纤分别穿过热缩管。不同束管、不同颜色的光纤要分开，分别穿过热缩管。

3、打开熔接机电源，选择合适的熔接方式。光纤熔接机的供电方式一般有适配器和电池两种。光纤常见类型规格有：mm多模光纤（ITU-TG.651）、sm色散非位移单模光纤（ITU-TG.652）、ds色散位移单模光纤（ITU-TG.653）、nz非零色散位移光纤（ITU-TG.655），bi耐弯光纤（ITU-TG.657）等，要根据光纤的类型来选择合适的熔接方式

4、制备光纤端面。光纤热缩管端面制作的好坏将直接影响熔接质量，所以在熔接前必须制备合格的端面。用专用的剥线工具剥去涂覆层，再用沾用酒精的清洁麻布或棉花在裸纤上擦试几次，使用精切割光纤切割刀，对0.25mm（外涂层）光纤，切割长度为8mm-16mm，对0.9mm（外涂层）光纤，切割长度只能是16mm。

5、放置光纤。将光纤放在熔接机的V形槽中，小心压上光纤压板和光纤夹具，要根据光纤切割长度设置光纤在压板中的位置，并正确地放入防风罩中。

6、接续光纤。按下接续键后，光纤相向移动，移动过程中，产生一个短的放电清洁光纤表面，当光纤端面之间的间隙合适后溶接机停止相向移动，设定初始间隙，熔接机测量，并显示切割角度。在初始间隙设定完成后，开始执行纤芯或包层对准，然后熔接机减小间隙（最后的间隙设定），高压放电产生的电弧将左边光纤熔到右边光纤中，最后微处理器计算损耗并将数值显示在显示器上。如果估算的损耗值比预期的要高，可以按放电键再次放电，放电后熔接机仍将计算损耗

7、取出光纤并用加热器双壁热缩管加固光纤熔接点。打开防风罩，将光纤从熔接机上取出，再将热缩管移动到熔接点的位置，放到加热器中加热，加热完毕后从加热器中取出光纤。操作时，由于温度很高，不要触摸热缩管和加热器的陶瓷部分。

8、盘纤并固定。将接续好的光纤盘到光纤收容盘上，固定好光纤、收容盘、接头盒、终端盒等，操作完成。

以上就是热缩管在光纤熔接机中的应用案例，针对光纤行业，有一款光纤接合用热缩管，后期为大家介绍它的具体应用。

今天我们通过射频同轴连接器装接线缆的一般方法、步骤、使用工具和检查项目，来了解配接软性线缆及半刚性线缆的射频连接器过程中，哪些地方要用到热缩双壁管。

1、装接工具

1.1软性线缆压接工具

线缆配套的软性线缆压线钳口可压接直径2.5~10.5毫米软线缆。适用于采用上述线缆的各类射频同轴连接器。

1.2半刚性线缆装接工具

半刚性线缆装接工具适用于SMA射频同轴连接器装接SFT-50-2(RG405/U)及SFT-50-3(RG402高温热缩管/U)等半刚性电缆，其它各类射频同轴连接器装接半刚性线缆时可参照上述工具适用。

2、装接方法及步骤

2.1软性线缆装接方法

A.剥线：按产品图纸规定的尺寸剥线，用剥线钳工具或刀片剥线均可，但不得损坏线缆芯线、内外绝缘层和屏蔽层，同时准备好带胶热缩双壁管备用。

B.焊接内导体：装上线夹和护线套，用熔点为+125°C以上的焊锡将内导体焊到线缆芯线上。注意不要把线缆绝缘层烫坏。

C.压接外导体：用压线钳将线夹压夹成六方，使线缆屏蔽与外导体良好接触。

D.装上热缩双壁管：用吹风枪均匀吹热风，视热缩双壁管收缩即可。

2.2半刚性线缆装接方法和步骤

A.剥线：按图纸规定和剥线尺寸，用车床或专用工具剥线。

B.焊料：应采用熔点为+150°C以上的焊锡焊接外导体，熔点+125°C以上焊锡焊接内导体。

3、检查项目

装接好的线缆组件应做接触电阻、绝缘电阻、介质耐压试验，检查有无裸线外漏，接口处需用热缩双壁管密封防护。