After you find thebest MIG welder for beginners, you want to know how to use it. We review how to use a MIG welder and offer tips that allow you to work like a professional. If you are just getting started with a welder, you want these practical tips.
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MIG焊接到底是什么？
Before you learn how to use a MIG wire feed welder, you should first understand what the machine does.
MIG焊接, otherwise known as gas metal arc welding, is a process that forms an electric arc from a wire electrode to the workpiece metal, allowing materials to fuse together.
You can use it with a variety of materials, such as stainless steel, magnesium, carbon steel, aluminum, copper, nickel, and other alloys.
Components of a MIG Welder
MIG焊接单元由您在使用之前必须了解的几个组件组成。当您想知道如何使用MIG焊机焊接时，我们建议阅读所有者手册。
这welder contains the electrode spool that creates the anode. Rollers push electrode wires into the welding gun. The MIG wire varies in size based on the type of metal you are working with. You will also need a gas tank to source the inert gas needed for welding.
Finally, the ground clamp completes the short circuit between your workpiece and the electrode wire.
MIG焊接准备程序（安全建议）
在学习如何使用林肯140 MIG焊机之前，您必须保护自己。
金属制备
肮脏的金属不牢固，不会产生牢固的纽带。如果需要安全的键，则必须在焊接之前清洁金属。有几种清洁材料的方法，包括使用角磨，砂纸或钢丝刷。根据材料类型确定最适合您项目的最佳选择。
设备准备
Before you learn how to use a gasless MIG welder, you must prepare all of your equipment. Gather all of your supplies and do a physical inspection of the welder. If there are any worn or damaged parts, you want to replace them before you start welding.
Wire selection
您需要选择适当的MIG wirefor your welding project. In most cases, you are going to use ER70S-3 or ER70S-6, but it’s important to research the right wire for your material and purpose. Otherwise, you won’t be able to create the beads needed to join your materials.
Gas selection
Welding gasesplay different roles in the process, from creating arc stability to offering weld penetration. The most commonly used shielding gases are argon, carbon dioxide, helium, and oxygen. Depending on your needs, you might prefer to use a mixture of the above elements. Your supplier might have recommendations based on the project you are working with.
了解电压和安培
安培数是相对于您使用的电线尺寸的。在大多数情况下，您将使用这些电线厚度以及以下安培数。
Voltage further determines the width and height of the bead. A shorter arc decreases the voltage and yields a ropey, narrow bead, where a longer arc and more voltage tends to produce a wider, flatter bead.
如何使用MIG焊机（5个简单步骤）
You can learn how to use a MIG welder on YouTube, or you can read through our helpful hints below. We will cover some of the best practices allowing you to focus on proper welding techniques and creating the solid joints you need.
1. Getting the Heat and Feed Settings Correct
As we discussed above, you must have the right machine settings if you want to achieve the best weld. Ideally, you will start by reading through the owner’s manual, which should indicate what settings you want for each type of material. Most applications require a gas flow rate between 20 and 25 cubic feet per hour. You can also learn how to use a gasless MIG welder on YouTube.
2. Start with Practice Beads
如果您知道如何使用林肯MIG焊工，那么您就会知道练习部分的重要性。除非您是初学者，否则您不必再练习。在废金属上尝试不同的技术，以了解最适合您的技术。许多人更喜欢使用推送技术，但是您也可以尝试使用拉动选项。您还需要知道正确的角度才能完成焊缝。
3.知道不同的焊接位置
高架位置焊接
高架焊缝取决于标准焊接的技术，但行进速度的提高。随着过度速度，您可以防止任何填充物从关节上掉下来。您也可能需要增加气体流量。
4. Welding Metals Together
5. Grinding Down the Weld
If you aren't worried about the appearance, you can skip this step. Otherwise, you want to grind the area to clean it up. Do this carefully, or you could cut the weld and damage your material.
Tips & Techniques For Beginners
你可以找到一个cheap MIG welderto get started with, but you want to use it safely. Here are just a few tips to get you started when you need a solid weld.
MIG焊接时的常见挑战
Porosity
If this welding problem is caused by an improper surface condition, you can clean the material to remove contaminants. You might also be struggling with the shielding gas coverage, which requires using a flow meter to check your settings.
缺乏融合
尚未正确粘附在碱金属上的消耗品可能会留下融合问题。当您缺乏融合性时，焊缝会变得虚弱并可能引起结构性问题。当您的游泳池中的金属融化时，会发生融合麻烦，但是您无法获得足够的能量将其融合到底板上。要解决问题，请检查您的电压和安培设置。
Craters
这unfilled end of a weld creates a crater. It occurs when the arc stops too soon. By allowing the crater, you permit a weak bond that could break. To prevent craters from occurring, you want to allow the weld puddle to fill before you stop the arc.
Burn-through
Melt through occurs when the weld metal penetrates through the base metal. It happens most often when working with thinner materials. To prevent burn through, you want to turn down the amperage when welding thin materials and keep the base metal from becoming too hot.
Dirty welds
脏焊缝可能是由许多问题引起的。您可能在需要清洁的材料上有污染物，或者您的极性设置可能是错误的。为了确定原因，您可能需要从基础知识开始，然后再次浏览步骤。
电线燃烧
Burn back is a common occurrence, resulting when the weld forms in the contact tip. You run into trouble when the wire gets fed too slowly or your MIG gun gets held too closely to your base metal. Consider increasing wire feed speed or lengthening your distance between the gun and workpiece.
Birdnesting
纠结的电线会产生一团糟，通常在MIG焊接时发生。麻烦可能与不正确的电线饲料设置，不正确的张力设置，使用错误的滚筒或使用不正确的尖端尺寸有关。再次检查所有设备和设置，以确保您正确设置。
MIG Welding Terminology
电线插在
杰出人物是喷嘴的线的部分melts off the end. Stickout and electrode extension are only used interchangeably if the contact tip is flush with the nozzle end.
推或拉
Pulling leads to a deeper penetration, but pushing creates the flat weld that covers more of your surface area.
旅行速度
这种速度是沿着工件移动的电弧的线性速度。行进速度决定了焊缝的粘结和安全水平。
Travel angle
该角度相对于具有垂直位置的枪。在大多数情况下，您的行进角度为5至15度，因为更多的东西会导致溅射，弧形不稳定和更少的穿透力。
工作角度
这work angle illustrates the gun position in relation to the welding joint angle. It varies based on joint configuration and position.
平坦位置
这downhand position is the easiest to use, allowing the metals to be joined flat against one another.
Horizontal position
这更困难的位置创建一个水平weld axis. With a fillet weld, the bead is placed where the pieces meet at a ninety-degree angle, while the groove weld faces along a vertical plane.
Vertical positions
Both the plate and weld lie vertically with this position. However, molten metal can flow downward and pile up as a result. Sometimes, welding upward prevents this from happening.
高架位置
This is the most difficult position with two pieces of material located above the welder. The welder must be angled properly to reach the joints.
People Also Ask (FAQs)
您可以没有汽油的Mig焊接吗？
这only time you should MIG weld without gas is when you use a flux core welder. Other wire types require the use of gas as a shield.
What kind of gas do you use for MIG welding?
MIG焊接依赖于四种气体类型 - 氩气，二氧化碳，氦气和氧气。每个人都提供了独特的好处以及某些缺点。
是什么导致MIG焊接过多的飞溅？
Most commonly, welding spatter is caused by an excessive wire feed speed, but it could also have to do with the metal composition, contaminants, a lack of shielding gas getting to the weld, and any coating on the metal.
MIG焊接容易吗？
MIG焊接is the easiest form to learn, often called “hot glue gun” welding. Once you master MIG welding, you might be ready to upgrade to aTIG welder。
什么电流用于MIG焊接？
Unlike other welding processes, MIG relies on one standard voltage and polarity type – DC. Direct current is the same as what is found in your car battery.
Conclusion
一旦您了解了MIG焊接的基础知识，您就会对可以在家完成的所有项目感到惊讶。通过了解所涉及的内容并开始在下一个项目中开始安全工作。