Valmet Automotive is experiencing rapid growth with a new Daimler contract to build its GLC SUV, partnership with a leading Chinese battery supplier and engineering acquisitions in Europe
It might have been a chilly -12°C outside the Uusikaupunki plant on the day of our visit, but things are certainly heating up for the Finnish contract manufacturer. The company has recently added a new, highly automated bodyshop for production of the Mercedes GLC; this is in addition to an existing line building Daimler’s A-Class model. We spoke to Jyrki Nurmi, senior vice-president, engineering services, about the company’s approach to setting up a new production line.
Can you offer an overview of the GLC project?Perhaps I can explain how the processes and responsibilities for this project work. Daimler is the customer and they are involved in the project but we are in the driver’s seat [regarding production]. So [the manufacturing processes] for both A-Class and GLC production are developed by Valmet Automotive. Daimler gives us strict specifications regarding the quality of the car, and we must fulfil these specifications. However, we do not copy Daimler’s [production] processes... we develop our own concepts and work forward from these. The project has gone well and we have been able to reach every milestone so far.
How does the GLC bodyshop differ from the A-Class facility?The GLC is a much more complex vehicle to build, so we have introduced new technologies into this bodyshop. The vehicle uses both steel and aluminium in its structure so we couldn’t just use the traditional spot-welding process. We have introduced new [self-piercing] riveting processes and we a have a nailing process for the cast aluminium [suspension] towers, and [flow-drill] screw fixing. So we have added three new joining processes for the GLC. We ran some tests before we started production, so we were well prepared. There are more robots in the GLC bodyshop and I think we are at a 98% overall automation level here. There are a very small number of manual operations on certain sub-assemblies and loading parts into magazines for the robots to weld, but spot welding is 100% automated and gluing is about 95%.
Has Valmet always been keen to embrace automation?We take a flexible approach to this and it depends on the customer’s requirements. For example, we have start-up companies as customers and they may have different approaches or budget limitations that must be considered when setting up the production system. VA [Valmet Automotive] has developed a highly flexible manufacturing system that enables high or low levels of automation and manual operations, according to the customer needs and possibilities. We introduced robots here [at Uusikaupunki] in the early 1980s and we have grown step-by-step since then. If you look at our assembly line, the operations are almost entirely manual. Flexibility is very important as the line has to produce more than one product. Today, it is assembling the A-Class and GLC, but in the past the same line has produced vehicles for Saab and Porsche.
The new bodyshop for the GLC is very sophisticated. Is it flexible enough to build other models in the future?That bodyshop is designed to able to build other variants for that [X253] platform, however, it’s always difficult to add a completely different vehicle and we would need to make some modifications to build another platform. We always focus the investment on the customer project rather than possible future operations.
How challenging has it been to recruit the number of skilled staff you have needed for the current level of expansion?So far it has been relatively easy, but we will see how successful overall we have been at the end of this year. In terms of assembly and other production staff, we have been very successful; in the first stage we recruited 250 people from 2,500 applicants. Of course, here in Finland there isn’t a lot of automotive manufacturing, but if people have the right mindset then they can learn quickly.
Have you diverted any of the people from the A-Class operation to the GLC project?Yes, this is what we normally do. When we start a project we always use some of our key team leaders to launch the new project; they provide advice and experience to the new engineers. This has been one of the keys to our ability to get new projects up and running very quickly.
"Daimler gives us strict specifications regarding the quality of the car, and we must fulfil these specifications. However, we do not copy Daimler’s [production] processes... we develop our own concepts and work forward from these" - Jyrki Nurmi, Valmet Automotive
It has been stated that the GLC project has been the most challenging in VA’s history. Why is that?The schedule for the GLC project was very tight. In fact, it was the same as that for the A-Class – and the customer said this was a ‘world record’ – but the GLC is a much more complex vehicle to build. In the A-Class bodyshop we had 200 robots but in the new GLC bodyshop we now have over 300 robots and it’s a much more sophisticated build process. We had very good cooperation with Daimler; the teamwork was excellent. There were a small number of people from Daimler onsite and this allowed us to consult quickly on any issues, but we were still driving the project. Another big challenge was the integration of new technologies; we had to quickly learn how to apply these and find the right people to operate the new systems. Daimler cars are all high quality but the GLC is a premium quality vehicle, so ensuring we met the high quality standards and a tight production schedule was another serious challenge.
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Do you find that VA’s strong engineering competence always meets or exceeds that required by your customers?I would say yes – as long as the customers’ request is within reason. We have certainly benefitted from working with a number of different, premium-quality customers. We came to understand that if we simply copied the OEMs’ [operations] it would be too expensive for us, so we had to be leaner, develop simpler solutions. So, for example, we developed our own concepts for production operations that suited both our customers’ requirements and the volumes being produced. There were turnkey system suppliers available to us, but they were more used to working with OEMs on manufacturing systems capable of producing 100,000-plus vehicles per year. It was much harder for them to develop something for the lower volumes we were producing at that time. So this is how we developed our own cost-effective operations and competences. If you look at our GLC bodyshop, it’s very compact – no wasted space, very lean, with automated transfer of the underbodies.
You have some experience building electric vehicles and you currently producing some hybrid versions of the GLC. Are you planning to target this segment in the future?Definitely, this is currently a growing market. We built the plug-in hybrid for Fisker Karma and the Think City electric car, so we certainly have the capability. Also, we will be offering development-engineering services for drivetrains and batteries.
Manufacturing facilities at Valmet Automotive’s Uusikaupunki plant are divided into four main areas: a bodyshop each for the A-Class and the GLC, a paintshop and an assembly line. There are also parts warehouses, but some of these have been restructured to make space for the new GLC bodyshop. The company has been building the A-Class for Daimler since 2013, with the aim to produce 100,000 units between 2013 and 2016. As production of the GLC ramps up, volumes of the A-Class will be steadily reduced.
There are over 200 ABB robots in the A-Class bodyshop, which operates at around a 90% automation level. This area currently has 150 people working two shifts. Communications manager Mikael Mäki notes that this is the second-largest robot welding shop in Finland, the biggest being the new GLC bodyshop. The only manual operations are loading parts into the robot welding cells, and a small amount of sub-assembly welding and adhesive application. Quality checks on the bodies are also automated with four robots, fitted with Perceptron vision systems, performing a series of checks on the line. If a BIW fails the initial check, the system will measure it again before it is removed from the line for a more detailed inspection.
Each of the bodyshops has a single, dedicated line. Mäki explains that the entire focus and design of these lines is to produce one type of vehicle; this is an area that illustrates the difference in approach between OEM and contract manufacturer, with the need for flexibility in the model mix being less important than producing a single vehicle model of high quality, on schedule.
The A-Class BIW features some aluminium sections that require riveting and adhesive joining techniques. In addition, there are fully automated rolling and hemming stations for doors, hoods and tailgates. All the body panels and vehicle components (for both A-Class and GLC) are sourced from the same suppliers used by Daimler and shipped to Finland. This not only helps simplify the logistics operation but ensures a consistency in quality. Mäki explains that this is important as VA does not replicate the German manufacturing operations, so it ensures consistent high quality in the finished product.
Compact and cost-effective bodyshop
The GLC bodyshop features the very latest in automation systems. Mäki notes that much of the experience gained in setting up and operating the A-Class bodyshop was used for the new GLC shop. Furthermore, both bodyshops were designed entirely by VA and not copied from the Daimler plants producing the same models. In terms of building the vehicle, everything about the GLC is much more complex than the A-Class; the GLC features a larger proportion of aluminium in its structure and a close look at a finished BIW reveals the multiple use of different steel grades and aluminium to make this vehicle both strong and lightweight. It is also easy to see where the different joining methods (weld, rivet, screw and glue) are applied.
To build this model in high volumes has required the application of complex processes and, as such, a very sophisticated new bodyshop. Here, the automation level is at 98% with over 300 ABB robots installed. Some of these are able to perform multiple operations at a single station by changing tooling. As with the A-Class operation, the GLC bodyshop is very compact, designed to maximise efficiency and cost-effectiveness. The automation story continues in the paintshop. All painting operations are fully automated with Dürr robots applying paint and manipulating the doors, bonnet and tailgate.
Sealing operations are almost entirely automated, again with robots intricately applying the sealant; the manual part of this operation represents the very low-tech end of the spectrum with sealant being applied by hand in the few areas that the robots cannot reach. General assembly features a single production line in an S configuration producing A-Class, GLC and hybrid variants. There are at present 100 workstations but this is likely to increase as volume and the number of variants grows.
There is a large sub-assembly area to the side of the main line where the powertrains, suspension and braking systems are assembled on jigs carried by automated guided vehicles, ready to be ‘married’ to the body assemblies. Operations are largely manual but one visually distinctive feature is the tooling. Much of it is painted green, showing that it has been designed and developed in-house by VA for specific vehicle projects; further evidence of the company’s ability to engineer its own manufacturing solutions.