Скачать с ютуб Top 5 Tips: Squeeze-Type Resistance Spot Welding в хорошем качестве

Top 5 Tips: Squeeze-Type Resistance Spot Welding

Shawn Collins, 3M Senior Technical Services Engineer, gives 5 great tips for squeeze-type resistance spot welding. Tip 1: Maintain the tips of the machine (00:35) It's very important to get good clean contact between the electrode tips on the machine and the substrate that you're welding. Because you’re welding through adhesives, it’s easy for the tips to get loaded up with adhesives and get dirty. You can open up the jaws of the machine and go in with a file belt sander with a ScotchBriteTM belt and clean the tips without reshaping them. If the tips become damaged or misshapen, you can use a tip dresser to clean and reshape the tips at the same time. Tip 2: Use a shunt clamp (02:23) Shunt clamps allow electrical conductivity from the top plate to the bottom plate. This connection between the two plates allows the machine to make a good solid weld. Make sure to start the first weld very close to the shunt clamp. After the current goes through the first weld, it will go through the next weld. As you continue down the line, the current for each weld comes through the previous weld. It's a good idea to use a shunt clamp or you may not get conductivity and the machine may not weld at all. Tip 3: Manually set the welder (03:37) This is an important safety tip. Because we weld on different materials with different strengths and properties, manufacturers set very specific parameters for the equipment. Many new machines are considered smart welders that automatically use the settings needed. However, with the newer steels, higher strengths and different thicknesses, these machines don’t always work properly. It's important to look at the procedures. For example, this one 2018 Honda operation has five different welding conditions or parameters, so we need to go into the manual settings for the machine and set the parameters to get a proper weld. Always consult the OEM information and manually set the welder. Tip 4: Do not weld through cured adhesives (04:47) You always want to weld through 3MTM adhesives while they’re wet. The moisture in the adhesive helps with conductivity for the weld. Once the adhesive has cured, it insulates the top layer from the bottom layer and you won’t have good conductivity. Always weld through the adhesives before the working time has expired and before they’re cured. Tip 5: Follow the OEM’s recommendations for multiple layers (05:26) If you can’t find the OEM’s recommendation, the issue here is you have cured adhesive between the bottom two layers and often you’re replacing only the top layer and welding through all three. You don’t want to weld through the cured adhesive because it won’t make a good weld. So now’s a time when you may want to weld through the same spot twice because the adhesive has been cleared out from the previous weld. However, try to find what the OEM says because some may discourage this. It's possible that welding through a second time can cause work hardening and weaken the weld area — but sometimes you may not have a choice and they’ll allow it. Important note: There are of course many factors and variables that can affect an individual repair, so the technician and repair facility need to evaluate each specific application and repair process, including relevant vehicle, part and OEM guidelines, and determine what is appropriate for that repair. For more advanced tutorials, check out 3M Collision Repair Academy https://www.3m.com/3M/en_US/collision... You’ll find courses that will expand your knowledge, deliver practical procedures that you can use right away, and, in many cases, earn you I-CAR credits. Website: 3MCollision.com Instagram: Instagram.com/3MCollision Facebook: facebook.com/3MCollision