In recent years, we propose fastening methods for aluminum die casting, which are widely used in automotive-related parts.
Aluminum die casting (hereinafter referred to as ADC), which is a special cast product, has been used in various fields in recent years as a material that can instantaneously mold precision parts. It has high strength and excellent castability, but it also has low ductility, and there are very challenging aspects when viewed from the fastening side. Among our many products, we would like to introduce fasteners and fastening methods that can be used for joining ADC with different materials. 1. Self-piercing rivet RIVSET Easily mechanically joins different types of materials without pre-drilling. It is also possible to fasten three or more materials. 【Features】 ■ Joining of dissimilar metals ■ No pre-drilling required ■ High static and dynamic strength 2. Fasteners for resistance welding WELTAC A method that allows resistance welding with the iron of the lower member by driving in iron rivets. We provide riveting equipment and rivets other than welding machines. Currently, there are six types of rivets available that can be used according to the application, such as material and plate thickness. 【Features】 ■ Enables spot welding of dissimilar materials. ■ Usable for aluminum and cast materials from 0.8 to 3.2 mm ■ Capable of fastening up to 2 to 4 sheets ■ Can be used in conjunction with adhesives
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basic information
1. Self-Piercing Rivet RIVSET Belhof has developed a special die for aluminum die casting. Using conventional dies (flat type) up to now causes cracking on the bottom side. Therefore, we developed a ring groove die that successfully reduces cracking. It is designed to leave more material around the rivet's legs, dispersing the stress that causes cracks. 2. Resistance Welding Fastener WELTAC In specific applications, die casting undergoes heat treatment to reduce cracking in mechanical joints. However, the WELTAC insertion process does not cause plastic deformation, so the risk of cracking is minimal. Therefore, it is possible to insert it in locations that are close to the end face. In some cases, it does not require heat treatment for die casting, leading to cost reduction.
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Applications/Examples of results
【Applications】 ■Automotive ■General Industry ■Construction ■Air Conditioning ■Energy Technology, etc.
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Rivset joint for ADC
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Company information
Belhof Corporation, headquartered in Bielefeld, Northern Germany, has been in operation for 145 years. We are experts in joining and fastening technologies that contribute to weight reduction, dissimilar material bonding, reduction of component count, vibration dampening, automation, and reinforcement of threaded sections. In Europe, we have received numerous adoptions from various OEMs and Tier suppliers. We encourage you to utilize our innovative technologies in your development and production processes. In Japan, we have a development base in Nagoya, where SPR evaluation tests can be conducted. Recently, we have received many inquiries regarding dissimilar material bonding with aluminum die casting, blind nuts with sealing functions for battery trays, and reinforcement of threaded sections. We can also propose automation solutions for these applications. Please feel free to consult with us.
