ヨコヤマ精工 List of Products and Services

Introducing the strengths of Yokoyama Seiko. Our company can instantly retrieve past defects and other issues from accumulated data. By centralizing information through database management, we aim to improve the efficiency of design and production, allowing anyone to access accurate data in real-time. Additionally, based on our standard manual for mold design, we are reducing costs by achieving flow production from mold design to parts processing, including evaluation with non-contact measuring instruments. Furthermore, by rationalizing the production process through "full automation and acceleration of production presses" and "improvements in setup and multi-machine operations for reduced manpower," we have been able to challenge cost reduction. [Yokoyama Seiko's Strengths] ■ High quality ■ Strict adherence to delivery dates ■ Prices that can be 20% lower *For more details, please refer to the related links or feel free to contact us.

• Contract manufacturing

We would like to introduce the "Features of Shaving Processing" by Yokoyama Seiko Co., Ltd. The typical cross-section consists of a sheared surface and a fractured surface, but shaving processing results in a cross-section that consists only of the sheared surface. Additionally, for a plate thickness of 1mm, the knockout radius is usually 0.2 to 0.3R, whereas in this processing, it is 0.03 to 0.05R. High precision mold finishing is required. (Finishing accuracy: ±0.001mm range) 【Features】 ■ Cross-section consists only of the sheared surface ■ Knockout radius 0.03 to 0.05R (for plate thickness of 1mm) ■ Finishing accuracy: ±0.001mm range *For more details, please feel free to contact us.

• Other machine elements

At Yokoyama Seiko Co., Ltd., we undertook a technical challenge to "replace machined products with cold forging processing using presses." By replacing products that were traditionally machined with press processing, we achieved a revolutionary improvement in productivity. Eliminating the riveting process by converting two-piece components into a single piece has made management extremely easy. 【Features】 ■ Revolutionary improvement in productivity ■ Elimination of the riveting process by converting two-piece components into a single piece ■ Extremely easy management ■ Achieved a 90% reduction in costs *For more details, please feel free to contact us.

• Other machine elements

We would like to introduce the features of "dissimilar material welding (spring material × steel)" by Yokoyama Seiko Co., Ltd. The spot welding of spring steel (hardened material) typically involves a spot welding process followed by a tempering process. Therefore, by implementing secondary current (primary current = spot welding, secondary current = annealing) in the proposed spot welding process, we have made it possible to perform processing solely within the spot welding stage, achieving a reduction in processes. *For more details, please feel free to contact us.

• Other machine elements

We would like to introduce the features of "dissimilar material welding (stainless steel × free-cutting steel)" by Yokoyama Seiko Co., Ltd. The sample product involved spot welding a nut to stainless steel; however, due to the nut material containing lead and the small size of the spot weld, the stability of the welding was poor, resulting in approximately 40% defects. By proposing to create a projection on the stainless steel side of the base material and changing to projection welding, we were able to eliminate defects and achieve stable quality. *For more details, please feel free to contact us.

• Other machine elements

We would like to introduce the features of Yokoyama Seiko Co., Ltd.'s "composite bending processing (2D)." Typically, the bending die structure that uses a core is designed to insert the core from the lateral direction using a cam. However, since the sample product involves 2D composite bending, the core structure from the lateral direction cannot be applied, and the usual processing is considered to be a combination of progressive and single-step processes. Therefore, by changing the core structure to be vertical (up and down), we have made it possible to process using only the progressive process. *For more details, please feel free to contact us.

• Other machine elements

We would like to introduce the features of progressive processing for box-shaped components by Yokoyama Seiko Co., Ltd. By proposing the shape of the joints for box shapes, we have made it possible to perform progressive processing that was previously not feasible. By incorporating the proposed riveting into one stage of the progressive process, we achieved zero step at the joints and stable dimensions for the box shape, resulting in stabilized quality. *For more details, please feel free to contact us.

• Other machine elements

At Yokoyama Seiko Co., Ltd., we undertook a technical challenge for cost reduction by improving the "nut riveting" process. Typically, nuts were attached during the welding process after production by pressing. However, we successfully installed a nut riveting unit within a progressive die, supplying nuts with a parts feeder and performing simultaneous riveting within the progressive die. Additionally, we achieved a 50% reduction in product costs. 【Features】 ■ Installation of a nut riveting unit within the progressive die ■ Supply of nuts using a parts feeder ■ Successful simultaneous riveting within the progressive die ■ 50% reduction in product costs *For more details, please feel free to contact us.

• Other machine elements

At Yokoyama Seiko Co., Ltd., we undertook a technological challenge for cost reduction by improving "bolt fastening and TOX fastening." Typically, products were produced using a press followed by a welding process. However, we successfully challenged ourselves by installing a bolt fastening unit within a progressive die and supplying bolts with a parts feeder to perform simultaneous fastening within the progressive die. Additionally, for the two-piece welded section, we succeeded in reducing the welding process by using TOX fastening within the progressive die. 【Features】 ■ Successfully performed simultaneous fastening within the progressive die ■ Successfully reduced the welding process by using TOX fastening for the two-piece welded section within the progressive die ■ Reduced product costs to one-fifth *For more details, please feel free to contact us.

• Other machine elements

Our company is equipped with a wide range of facilities to meet various requests, and we engage in mold manufacturing, press processing, and assembly (robotic assembly). Professional technicians with expertise and know-how in mold manufacturing and press processing will sincerely and diligently respond to even the smallest requests from our customers. 【Business Overview】 ■ Mold Manufacturing ■ Press Processing ■ Assembly *For more details, please download the PDF or feel free to contact us.

• Interior parts