1 Continued on next page... Economics The mig process can afford the user considerable cost savings when compared to other welding processes. The question that usually arises is whether mig will save me money and should I use it. Most commonly, the question concerns a comparison to the shielded metal arc (stick electrode) process. The only way one can decide if the savings with the mig process can pay back the investment in new equipment, welder training and production changes is to evaluate it for your shop and your product. In order to determine this, cost studies must be made. This section presents general techniques and related information for estimating the welding cost. The most important factors in determining the welding cost are labor requirements, overhead allocations, and materials. Labor requirements and associated overhead allocation dominate the cost. However, there are many manufactured procedures associated with a completed weldment other than just the welding where the mig process affords economic benefits. These include weld cleaning, metal finishing, reduced inspection time, and a reduced number of defects. Other factors affecting the cost may be available fixturing, materials handling, work rules, customer requirements, welding fumes, etc. The importance of these areas will vary greatly from shop to shop, so they will not be included in this discussion. However, you must consider them. The greatest incentives to investigate mig are the case histories over the past quarter century. In those shops where welding is a significant part of the product cost, the cost of a weldment has been reduced by about 40% to 50% by using the mig process. The standard formula presented for the major cost factors associated with making the weld can be used for any electric welding process.
Introduction
Labor &
Overhead
Material
Calculation
Sample Cost

 

 

 

Variations-
Metal
Transfer
Equipment
Power
Supply
Shielding
Gases
Wire
Electrodes
Safety
Welding
Techniques
Welding
Conditions
Economics
Weld
Defects
Mig Spot
Welding
Tables