ヨコヤマ精工 List of Products and Services

We would like to introduce 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 high-speed production presses" and "improvements in setup and multi-machine operations to reduce workforce," we have been able to challenge cost reduction. 【Strengths of Yokoyama Seiko】 ■ 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.

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We would like to introduce the "Features of Shaving Processing" by Yokoyama Seiko Co., Ltd. Typically, the cross-section consists of a sheared surface and a fractured surface, but shaving processing results in a cross-section with only the sheared surface. Additionally, for a plate thickness of 1mm, the draft angle 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 with only the sheared surface ■ Draft angle 0.03 to 0.05R (for a plate thickness of 1mm) ■ Finishing accuracy: ±0.001mm range *For more details, please feel free to contact us.

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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 conventionally machined with press processing, productivity has improved dramatically. Eliminating the riveting process by turning 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.

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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 with only the spot welding process, achieving a reduction in the number of processes. *For more details, please feel free to contact us.

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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 extend a projection from the stainless steel product side and changing to projection welding, we were able to eliminate defects and achieve stable quality. *For more details, please feel free to contact us.

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We would like to introduce the features of "composite bending processing (2D)" by Yokoyama Seiko Co., Ltd. Typically, the bending die structure that uses a core pin is designed to insert the core pin from the lateral direction using a cam. However, since the sample product involves 2D composite bending, the core pin 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 pin 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.

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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 seams for box shapes, we 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 seams and stable dimensions for the box shape, resulting in stabilized quality. *For more details, please feel free to contact us.

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At Yokoyama Seiko Co., Ltd., we undertook a technical challenge for cost reduction by improving the "nut riveting" process. Typically, after production by pressing, nuts were attached during the welding process to create the final product. However, we successfully challenged ourselves by installing 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 - Achieved a 50% reduction in product costs *For more details, please feel free to contact us.

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At Yokoyama Seiko Co., Ltd., we undertook a technical challenge for cost reduction by improving "bolt fastening and TOX fastening." Typically, products were produced using a press followed by a welding process, but 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 die. Additionally, we successfully reduced the welding process by using TOX fastening for the double weld section within the progressive die. 【Features】 ■ Successfully performed simultaneous fastening within the progressive die ■ Successfully reduced the welding process by using TOX fastening for the double weld section within the progressive die ■ Reduced product costs to one-fifth *For more details, please feel free to contact us.

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Our company is equipped with a wide range of facilities to meet various requests, and we carry out 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.

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