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Hitachi

Hitachi Astemo, Ltd.

We provide high-quality products that combine cutting-edge technologies such as IoT and AI with the skills of craft masters to customers all over the world.

Autonomous Driving

High speed, high precision focus adjustment technology for camera module

High-precision focal adjustment is essential for processing stereoscopic images from stereo cameras. As part of the lens/CMOS substrate 6-axis adjustment process, we have adopted the collimator method creating a high-precision adjustment technology that reduces the time for adjustments of the optical axis and focus to one-tenth the time of conventional methods.

In addition, we have developed an absorption wavelength-matching UV-LED module for fixing the lens adhesive, which reduces the variation in the amount of adhesive and focus shift after curing to realize a highly efficient production process.

Camera Module Automated Assembly Technology

Stereo cameras are precisely assembled to recognize the external world in three dimensions through stereoscopic processing from the left and right of the images.

We developed the direct view system for an optical axis/roll angle adjustment process to adjust the X/Y axis and roll angle of the camera. To ensure camera stability, we employ a spring mechanism with three points of contact on the reference surface.

xEV, Engine Systems

High-efficiency Production Using Deep Learning
(Used by motor and inverter production lines for visual inspection)

The process of joining precision parts demands a full inspection of the appearance of the product in addition to monitoring the process conditions.

A false alarm rate (the rate at which an acceptable product is judged to be NG) is used to prevent the release of defective parts. We are now promoting activities to utilize deep learning to improve this rate to 1% or less. For existing lines, we are working on hybridization with existing rule-based image inspection, as in the case of inverters.

Batch Assembly method in the Manufacturing Process

The process we use to manufacture intelligent power modules uses a batch assembly method powered by the latest technology, reducing numerous steps for highly streamlined manufacturing.

Initiatives to minimize parts inventory and logistics/transportation costs

Unlike conventional engine parts, electric products including purchased parts and finished products, require considerable time to move. In order to increase the production of inverters for electric motors we have launched an automated warehouse system that matches optimal inventory volume and just-in-time production. The system relies on activation signals from the line-side to send requests for single units to the automated warehouse. This system helps to avoid product oversupply and shortages.

Adopting Laser Processing Method in Next Generation Products

Conventional products use electrical discharge machining to bore injection nozzles, but our next-generation injectors use a high-precision laser processing method that results in sharper edges and smoother surfaces. It also reduces production time by 82%.

High-speed, high-precision machining of high-strength materials

In response to the growing market for DIG (Direct Injection Gasoline) high pressure engines we endeavored to differentiate our products. Using high-strength, high-reliability materials and structures that enable high pressure, low noise, small size, and light weight we were able to improve our competitiveness and reducing costs.

In order to enable this process, we have developed (a) high-speed, high-precision machining of high-strength materials (hardness: conventional HRC11→34, machining time: 30% reduction), (b) automated transfer and assembly lines to prevent contamination, (c) conventional screw fastening → crimping fastening, (overall height: 60.2→45mm, weight: 940→820g), (d) spherical high-precision machining process (lower noise level of 68dB). Mass production is underway.

Advanced Chassis

Evolution of Product Transfer Technology in Suspension Assembly Lines

As the number of vehicles expand, the number of suspension specications follows suit. In response to these changes we have introduced our own product transfer equipment which eliminates the need for special jigs and setups enabling us to have a exible system to quickly adjust to market specialization.

Next Generation Motorcycle

Processing Technology to Improve Performance of Motorcycle Disc Brake Calipers

The world‘s smallest monoblock bridge span is made using a special tool that suppresses vibrations during the complex and high-precision cutting of the piston cylinder holes and seal grooves.

Processing image

This technology processes the monoblock calipers as one piece and does not use fastening bolts, thereby meeting the need for smaller, lighter and more rigid brakes.

Cutting-edge production methods achieved through original development and production methods

Transfer molding requires optimization of design, circuit board manufacturing, and resin molding technologies. The cutting-edge production methods used for this product are the result of close coordination between R&D and Production Engineering Divisions.
The resultant production process is a transfer mold with optimized resin molding and exclusive dies that do not impact on the circuit boards or electrical components.

Extensive atomization options in small size injectors

A valve selection mechanism has been adopted to make the injector compatible with a wide range of flow and atomization options.

Our technologies result in a smaller, lighter valve that help reduce operational noise. We use a fuel separation mechanism with a cross-flow path to deliver fuel from the atomization chamber directly to above the nozzle, resulting in a finer mist.
Fuel is therefore diffused earlier in the process creating a finer particle size.
Either standard injection (unidirectional/bidirectional) or swirl atomization (unidirectional) can be selected.