4 Common Challenges to Address Before Automating the Welding Operation
June 14, 2016
For first-time users, welding automation can seem intimidating. When making the investment, it is important to plan the purchase carefully and to implement some best practices in order to achieve the best results. Starting out with simple equipment, getting the appropriate buy-in, and analyzing part volume and workflow are all critical.
New to automated welding
A robotic welding system can help companies improve efficiencies, eliminate waste and produce better products — as well generate greater profitability and competitiveness. For those new to automation, it is important to plan carefully before purchasing a system and follow some best practices to gain the most out of the investment. Here are some key challenges to consider when automating a welding operation, along with recommended solutions.
1. Start simply and carefully
Welding automation is an investment on both sides: in technology and in employees. The trick is to find a balance between reducing waste (material and money) and increasing productivity and quality, which should be done incrementally. Ideally, the physical and human capital grows in unison. That means training robotic weld cell operators so they can use the robot most effectively to boost productivity and quality.
It is also imperative to tackle each welding automation project one step at a time. Start by automating production of simple, repeatable parts and then move to more complex ones. For example, consider a heavy equipment manufacturer investing in a welding robot for the very first time. This manufacturer would be better served to automate the welding of sub-assemblies for a backhoe frame first, as opposed to investing in a robotic welding system that welds the entire frame.
For first-time users, pre-engineered robotic weld cells are often the best option. These systems are an easy-to-use solution that includes all the equipment needed for robotic welding — pre-wired and pre-assembled. They are also a better alternative than buying a used system and trying to retrofit it. Often used systems do not meet current safety standards, which can create a host of unforeseen, and potentially costly problems.
2. Gain buy-in and input
It is important to have buy-in and gather input from management and from welding operators, in order to make the investment in a robotic welding system successful. These two groups, respectively, are responsible for approving the purchase and making it operate as efficiently as possible.
Before gaining buy-in from welding operators, help them understand the opportunities a robotic welding system presents. Some welding operators fear welding automation will ultimately make their jobs obsolete. The truth is, skilled employees are becoming harder to find in the United States as more manufacturing companies fight to stay competitive, particularly with manufacturers abroad.
Robotic welding systems actually provide welding operators the chance to learn new skills and become more valuable by helping the company grow. In some cases, the technology also opens up the opportunity for promotion and long-term career advancement. Not only can welding operators become robot programmers — an excellent way to expand their skill sets and viability — but robotic welding systems can also free up skilled operators for manual welding of more complex welds.
3. Determine part mix and fit-up
To determine if welding automation is the right choice, it’s important to ask one key question: Are the parts good for a robot? The best options are simple, repeatable parts with minimal gaps. Always have a robotic integrator or robot OEM evaluate the part to determine its suitability, as doing so up front can minimize unnecessary and expensive issues. Part evaluation is often as simple as providing an electronic CAD drawing for review of the part.
Some parts are not well-suited for automation because they require a high degree of operator input. For example, a part with a very tight access point that requires manipulating the gun in a small, confined space would not be a good fit for automation; there would be difficulty gaining joint access with the robotic MIG gun.
High-volume, low-variety applications are very well-suited for automation, as they require minimal considerations when it comes to tooling changes. However, if small batches of product can utilize a quick tooling change, it is possible to produce a low volume part efficiently, too. Timing is everything in this situation — if it takes a welding operator an hour to change the tooling for 10 welds he or she could easily complete by hand in the same amount of time, then it’s smarter to do them by hand.
It is important to note that once a program is in the robot, it’s always there. So, although there is an investment of time up front to create the program, it is simple to recall for future use on both larger and smaller volume part runs.
4. Analyze workflow
A robot welding system can increase throughput significantly, but ask these questions before implementing one. Are the rest of the operations ready for the gain in throughput? Can upstream manufacturing processes continue to deliver the necessary quantity to the robot? Can downstream processes — such as paint, packaging or assembly — handle the higher production? When looking at the flow of parts in a welding operation, it’s critical to consider the whole picture.
Ensure that any rework required of the part before entering the weld cell has been eliminated from the process and the employees supplying parts to the robot can match its cycle time.
Ask these questions ahead of implementation and plan accordingly so that everything continues to flow smoothly. No company can benefit from welding automation if the operation simply consists of moving a bottleneck from one department into another; it is possible to miss out on the overall productivity and efficiency a robotic weld cell can deliver.
Always remember, any investment in the welding operation should be made with care. Consult a trusted robot OEM, integrator or manufacturer for assistance.