From 2005, WTB continuously bought 27 LX machines from Starrag. What is the main reason for WTB to be Starrag’s long-term customer?
Decheng Wei: Advanced processing technology, advanced functions, stability and high precision of equipment and good after-sales service of Starrag are the main factors.

What did Starrag machines bring to your company in the past 13 years?
Decheng Wei: 1. The innovation of blade processing technology has greatly improved the quality of the blade; 2. Advanced technology and equipment have promoted the improvement of the skill of the company’s technicians and improved the safety awareness of employees; 3. Advanced technology and equipment have led to higher production effi ciency, and as a result, the company’s turnover.

What is the main reason for blade manufacturing line retrofi t in 2018?
Decheng Wei: Mainly, WTB and the world-renowned aero engine manufacturer Rolls-Royce have signed a “long-term strategic cooperation agreement”. The blade technology aspect is led by the Swiss company Starrag. WTB therefore decided to carry out an overhaul and reconstruction of its’ existing equipment to meet the new requirements.

What was the main content of retrofi t? What was the most diffi cult in it?
Decheng Wei: It is mainly the overhaul and reconstruction of the Starrag LX line machines, of which six are LX 151 which were overhauled, and four LX 051 machines reconstructed tom include double-drive technology. The main diffi - culty is due to the ultra-high precision of the Rolls-Royce blades, whose high requirements and standards determined the improvement of the hardware aspects of equipment overhaul, and the reconstruction or the optimisation of the electrical parameters of the machines.

Were there any hard problems during the retrofi t and how Starrag act on it?
Decheng Wei: Rolls-Royce blades have high processing requirements, “Not only the blade size must be qualifi ed, but also the surface quality of the blade must meet the standard”. Under the premise of ensuring the precision of the equipment, Starrag has also conducted the relevant optimisation of the electrical parameters for the surface quality of Rolls-Royce blades to achieve the new requirements.

How about the retrofi t now?
Decheng Wei: Presently, the overhauled equipment has been put into the production of Rolls-Royce blades, and the qualifi cation rate and stability of Rolls-Royce blades are also high.

Please talk about your wish and suggestion to Starrag after sales service.
Decheng Wei: At present, we are very satisfi ed with Starrag’s after-sales service for this project. In particular, the team of Starrag engineers and site managers cooperated very well with WTB. For this project, during the entire warranty period, it is hoped that Starrag’s resident service personnel will provide fast and quality service on the WTB site. After the warranty period for the overhaul and reconstruction project expires, a “value-added service” contact has been proposed by Starrag.