NADCAP Accredited Welding Shop

Our strengths in welding are focused around 3 core functions: Resistance Welding (spot welding, seam welding, and stitch welding) Tig/Mig welding, and Brazing. We are NADCAP accredited welders for each of these 3 core functions.

Resistance welding: Lynn Welding provides resistance welding services to many of its customers. Lynn Welding uses SCIAKY welders which are considered the best in the world for maintaining the strictest tolerances required by the aerospace industry. Our SCIAKY welders are capable of welding aluminum, Stainless steel, Titanium, Inconel and most other metals while maintaining the proper conditions to ensure a quality weld. Our resistance welding operations are closely monitored by our internal quality department which ensures that all of the resistance welding functions fall within the guidelines set forth by NADCAP( National Aerospace and Defense Contractors Accreditation Program).

What is Resistance Welding: Resistance welding consists of the joining of two or more pieces of metal by the application of heat, electricity and pressure. Resistance welding embraces that branch of welding art in which the welding heat in the parts to be welded is generated by the resistance offered by these parts to the passage of an electric current. It differs from other forms of welding in that no extraneous materials such as fluxes, filler rods, etc are used; therefore metallography of the weld is not complicated by the addition of these materials. Resistance welding further differs from the fusion welding process, by utilizing the application of mechanical pressure to forge the heated parts together. The effect of the pressure is to refine the grain structure, thus producing a weld with physical properties in most cases equal to the parent material, and sometimes even superior.

Types of resistance welding that we perform:

Spot welding: is the most widely used form of resistance welding. This type of welding is done with electrodes which are held essentially stationary while the weld is being made. We are NADCAP accredited for this welding procedure

Seam Welding: is the process of making a series of overlapping welds by using two rotating wheel electrodes without opening the electrodes between spots. This type of weld is air and liquid tight. Our NADCAP certification also allows us to perform this type of welding procedure for the aerospace and defense industries.

Stitch Welding: is the process of using the spot weld configuration but overlapping the actual weld nuggets over the length of the 2 pieces of metal being joined. This type of weld can produce the results of a seam weld in an area where two rotating wheel electrodes will not fit.

The Weld Nugget: the weld nugget is the area in the resistance weld that actually joins the two pieces of metal together. The weld nugget is essentially the exact point where the two pieces of metal melted; when under heat and pressure and then cooled to form one piece. Our resistance department has the experience to control the nugget size to our customers specification. Our resistance welding department is one of the most respected in the aviation industry; our experience and understanding of the fundamental laws of resistance welding allows us to maintain tight tolerance control required by the aviation industry.




Although the majority of our resistance welding is performed for the aerospace and defense industries, we also can, and do; perform resistance welding services for many other industries.

Tig/Mig Welding:

Lynn Welding’s reputation really comes to light when you see the weld bead produced by one of our certified welding technicians. Gas Tungsten Arc Welding (GTAW) is one of our specialties. Our experienced welders follow all of the NADCAP requirements needed to ensure a quality weld. Weather we are welding aluminum or stainless steel, rest assured that the end result will be well within your tolerances and the weld will be of X-ray quality. Because Lynn Welding is NADACP accreditied we must follow a very defined and strict set of guidelines when welding our customer’s components. These guidelines ensure that our qualified welding technicians are tested regularly in all metal groups to ensure that their welding skills remain intact.

Lynn Welding serves a broad group of industries but weather the industry requires NADCAP accreditation or not, Lynn Welding always takes all of the necessary steps to ensure that the weld quality is superior, even if it doesn’t require X-ray certification or FPI (Fluorescent Penetrant Inspection). Lynn Welding has the capability to weld class “A” materials and ensure that the part does pass your required inspection. Our experience and quality workmanship have earned us a reputation that we are truly proud of. Thanks to our talented team at Lynn Welding we have become the go-to people when it comes to welding your complex components for the aerospace and nuclear industries. Our shop floor is kept clean and organized at all times. Lynn Welding has a large assortment of Miller welding equipment capable of meeting any welding requirement.

Besides being NADCAP accredited and ISO compliant, Lynn Welding can contribute some of its success to the cleanliness and organization of our shop. One of our goals is to keep our shop as clean as possible at all times. Lynn Welding recently underwent a major clean-up operation. The goal of the clean-up was to free up floor space and improve the atmosphere of our employees. We now have a grinding room installed in our shop, the main purpose of the grinding room is to keep the shop clean of airborne dust.

Vacuum Chamber Welding:

Most often titanium is welded in our vacuum chamber;   Our custom made chamber can accommodate large parts. We have the capability to weld small batch orders and long term production runs in our vacuum chambers. We always fill the chambers with certified argon gas that is not less than 99.995 % purity with not more than 5 to 20 ppm free oxygen. Because of our experience in Titanium Welding, we have become a highly sought after by many of the leading aerospace companies.
Let us show you the color free welds of our titanium parts.
               
Brazing/Soldering:

Lynn Welding is NADCAP accredited for brazing. Take a look at some of the advantages of brazing:

• Properly brazed joints are pressure tight.
• Brazing allows the joining of dissimilar metals.
• Precision dimensions can be maintained while brazing machined components.
• Extremely thin walled material that cannot be welded can be joined by brazing.
• Brazing can join fabrications economically
• There is less heat “shock” and distortion when brazing