As the OEM's Spanish factory introduces CMF vehicles, AMS goes to see the plant-wide preparations
There are a couple of words which crop up frequently when talking to Renault executives about the company’s Palencia plant in northern Spain: one is quality, the other is competitiveness. Palencia has long been the hub for Renault's C-segment Mégane range, but it is now building the fourth-generation version plus the Kadjar crossover based on the Renault-Nissan Alliance’s Common Module Family (CMF) architecture. As such, it has become a standard-bearer for Renault’s campaign to improve production efficiency, cost control and customer satisfaction.
The plant began making the Kadjar earlier this year, and will soon move from pre-production to full production of the Mégane five-door hatchback. They are the first of six CMF cars that will eventually come out of Palencia. For now, though, they are made alongside three versions of the third-generation Mégane, which will remain on the stocks for some time until being replaced.
Palencia is one of four Renault plants in Spain and a major beneficiary of the €600m ($640.6m) the company is investing in the country, starting last year and finishing in 2016. With the Kadjar proving to be as big a success as the smaller Captur crossover made at nearby Valladolid, the workforce at Palencia has swollen from 1,900 to 4,200 in 18 months, largely as a result of reinstating the third shift, which was discontinued in 2011. There has been an even greater increase in productivity; a plant which was turning out fewer than 600 cars a day in 2014 is now producing 1,350, or one every 58 seconds. Next year it will build 300,000 cars – 20,000 more than the quota agreed with the unions.
Implementing major changes
To prepare for the introduction of CMF, every employee – including the plant director – had to undergo retraining, on average receiving 87 hours. There have also been changes to the 30,000sq.m supplier park, which contains five main suppliers employing 300 personnel and delivering stampings, plastics and some sub-assemblies.
Renault Palencia now makes greater use of AGVs
To replace the former logistics building, Palencia now uses an external warehouse plus a second one fewer than 4km away. The factory conducts some stamping of external parts on-site, but the majority come from Valladolid, as do the engines. The gearboxes are among the furthest-travelled components, arriving from Seville in southern Spain.
“For Kadjar, around 80% of our supply comes from within Spain, and for Mégane it will be 70-80%,” says Jose Vicente de los Mozos, manufacturing and logistics group director, “but with CMF the number of suppliers is lower. Because Kadjar shares a platform with the [Nissan] Qashqai, many parts come from Nissan Sunderland, but more than 60% are sourced within 100km, which means lower logistics costs.”
Adopting Alliance strategies
With the introduction of CMF, Palencia is now more fully integrated into the Alliance Production Way. For instance, the body-side assembly line for CMF cars, which has been fitted with 70 of the 320 new robots, follows Nissan Standard Line processes.
The greatest impact made by CMF can be seen in the contrast between Palencia's two bodyshops, which employ a total of 856 people. A mere 14 personnel work in the CMF body assembly area, where there is zero manual parts delivery and handling. Across the way, where Mégane III bodies are constructed, there is a more traditional line, with partially completed bodies halting for around 48 seconds at each workstation. Sixteen auxiliary lines feed in panels. Welding is performed by robots, including 70 which have been upgraded for door and bonnet assembly, but human operators are needed to guide many body sections into place for joining.
“We are not at the level of [Nissan] Sunderland yet, but in Renault we know where we want to go” – Jose Vicente de los Mozos, Renault
Palencia is the third Renault plant to benefit from new painting technology resulting from the Alliance’s partnership with Daimler. A grey-walled light booth developed by the process engineering and design team emits a reference light which allows operators to spot the smallest colour differences between sections painted in the factory and components from outside suppliers. For the new Mégane, for instance, the doors and bumpers are painted in different areas of Palencia while the composite tailgate is a bought-in part. Employees need at least one year of experience to work in this area.
This is just one example of a thorough inspection process which occurs at every stage of production. Any worker can stop the line to report a defect; the golden rule is that no faults should be passed on. Every car is given a full electrical check, ten minutes of static tests, ten minutes on the plant driving track and then a full waterproofing inspection, and with driver assistance systems becoming more comprehensive, there is now a separate review area for these too.
Tackling greater complexity
There is just one, S-shaped final assembly line, which has also had to be modified to accommodate the dimensions of the CMF cars. This has created more diversity in the workstations because of the new features made possible by CMF, such as the all-wheel-drive system for the Kadjar and the 4Control four-wheel steering available on the new Mégane.
The total parts count is now 4,500 – double what it was before. To help operators manage this complexity, kitting is being phased in and is now 75% operational. The eventual aim is to have full parts kits brought as close to the workers as possible for improved ergonomics, safety, efficiency and quality.
“We started bringing in kitting before the arrival of Kadjar and Mégane IV as part of our leaner manufacturing,” says de los Mozos. “More AGVs is the next step, and we are thinking of kitting the automated stations and looking at collaborative robots, but first we need to stabilise and decide on the right level of automation. “In one year, we will see manufacturing of the secondary flow automated. We are not at the level of Sunderland yet, but in Renault we know where we want to go.”