Leveraging digital transformation to shorten the time from designing to manufacturing production lines

Undertaking a digital transformation

Hirata Corporation (Hirata), headquartered in Kumamoto, Japan, is a global leader in constructing production lines. It has locations throughout Japan as well as plants in North America, Europe and across Asia, providing production equipment to automotive and semiconductor manufacturers worldwide.

Hirata provides transmission assembly lines, engine assembly lines, electrical vehicle (EV) and other automotive production equipment to numerous manufacturers.

The company has established a system in which it handles all aspects of its business, from development and proposal, design, parts manufacturing, assembly and verification and production startup to maintenance and service.

As sales increased, the company’s newly built plant was expanded to provide space for adjusting equipment test runs and enabling customers to conduct inspections inside the plant. Hirata has integrated design, manufacturing, assembly, electrical work and adjustment test runs. As the company constructed and subsequently expanded its plant, it also started a large-scale digital transformation.

After evaluating several simulation solutions, Hirata chose Siemens Digital Industries Software’s Process Simulate in the Tecnomatix® portfolio. It also decided to work with Siemens as its strategic partner to promote digital transformation, and as part of that initiative introduced the Siemens Xcelerator business platform of software, hardware and services to the company.

Strategically promoting digital transformation

By embracing digital transformation, Hirata has been able to shorten the time it takes to go from product design to manufacturing. Hirata has front-loaded its investment in resources early in the product development process, bringing forward work that was previously done in later stages.

As Hirata’s customers began to face shorter production times, they focused on how to compress the time between new products, handle low-volume, high-mix production and shrink the period required to modify production lines during operation.

Hirata knew the digital transformation would help them, but it was challenging to explain to senior management and on-site personnel what would change and what the simulations with Process Simulate would reveal. Describing the benefits of simulations was particularly difficult at first. Some personnel had the impression that simulations would require twice as much effort. However, as the implementation went ahead, workers were able to see the positive effects and started saying it made sense.

Simulation supports high-quality manufacturing

“Prior to introducing digital simulations, we were able to check for equipment interferences and conduct on-site verifications, but now we were able to teach robots offline,” says Shoichiro Seki, general manager of the engineering departments at Hirata. “Once that data has been downloaded, the robots can immediately be operated on-site, which is a huge advantage.

“Previously, we had to turn on the power, start up the robots and then perform the teaching work to check for interferences, cable twists and other issues. Now all of that can be performed offline, which is incredibly helpful for manufacturing.”

Leveraging Process Simulate

Hirata’s major customers have added 3D model validation to their equipment development process and most of them were using Process Simulate, which is part of Siemens Xcelerator. This also motivated Hirata to select Process Simulate.

“Previously, we required three engineers to complete the verification process in three to 10 days, but one engineer using Process Simulate for cable simulation can complete the verification process in approximately two hours,” says Seki. “That reduced man-hours compared to conventional methods by 90 percent and manpower requirements by 66 percent.”

“After a year of simulation experience with Process Simulate, I was able to gain a deeper overall understanding of the work I had been doing for the past five years in my own area of expertise, human machine interface,” says Mami Hayata, chief of the control design group in the engineering department. “This enabled me to receive information from many different fields, including mechanical, control, instrumentation and robotics. The introduction of simulation has allowed me to learn so much more about the world of equipment.”

“I used to only talk to people in control,” says Kosuke Nishi, who is a mechanical design engineer. “But now I have connections with various people in mechanical, control, instrumentation and robotics. Initially, when simulations were introduced, my requests to mechanical designers to provide information for simulation were met with resistance, but now that awareness and demand have increased considerably, I feel that we are able to exchange useful information.”

“Previously, we determined the optimal cable routes and fixing methods by trial and error,” says Ryosei Sekiguchi, manager of the control design group in the engineering department. “With Process Simulate we can use simulations to verify multiple patterns of routes and fixing methods simultaneously, which significantly reduces the time spent on that.”

“Prior to introduction, we used 2D drawings to confirm ergonomic areas and workability based on planar dimensions, which frequently led to insufficient verification of worker postures and product shapes,” says Seki.

“This often resulted in us discovering necessary adjustments only after the completed equipment started being used. However, with the introduction of human machine interface, we can now perform work verifications for various postures in 3D. The results are clear and easy to understand, allowing smooth consensus building with customers.

“We compared simulation software from various manufacturers, but ultimately chose to adopt Process Simulate due to its global market share and especially its widespread use among automotive manufacturers.

“As a result of this evaluation, we chose Siemens as our strategic partner to promote digital transformation. We also introduced Siemens Xcelerator as part of that effort.”

Future of Process Simulate

Hirata is implementing Process Simulate add-on features every year, including modules for robotics, virtual commissioning, safety and cable. They have also introduced Plant Simulation in the Tecnomatix portfolio in various departments.