Language: 日本語 | English
Language: 日本語 | English
Use our ability to make proposals, procure materials and cope with quick delivery when you have no time to spare between testing and mass production! In particular, leave fine, narrow, small, thin and complex leaf springs to us. Example: thin: 0.03, small: rice grain size, narrow: diameter 0.5.
We also accept press stamping with dies produced by other companies. Put our ability to maintain dies and our quality assurance to good use. We have presses between 20 and 150 tons and can handle die sizes of up to 900 mm, plate thickness of 2 mm and materials width of 200. Materials include SPCC and SUS springs.
【Product Specifications】
Material: Phosphor Bronze
Thickness: 0.2
Shape:
φ1.9 (1 location)
φ3.7 (3 locations)
Total Length: 14
Application: Antenna Element
Precision in Concentricity & Coaxiality! Complex-Shaped Antenna Element
We successfully achieved concentricity and coaxiality within 0.03 for four interconnected circles of varying diameters, despite their unstable connections.
For more examples of leaf spring products, click here:
https://www.kyowa-hearts.com/spling/
☆ Frequently Asked Questions
https://www.kyowa-hearts.com/faq/
☆ Equipment Information
https://www.kyowa-hearts.com/setsubi/
☆ Contact & Process from Prototyping to Mass Production
https://www.kyowa-hearts.com/flow/
＜Contact Information＞
Kyowa Hearts Co., Ltd. – Rumi Sakamoto
■ Address: 1-5-1 Takata-Nishi, Kohoku-ku, Yokohama, Kanagawa, Japan
■ TEL: 045-593-6116 FAX: 045-593-6121
■ Official Website: https://www.kyowa-hearts.com
Material / Thickness:
Material: C2680R-1/2H
Thickness: 0.2mm
Processing Details / Precision:
Drawn Section: Outer diameter φ1.2, Height 3mm
Curling Section: Outer diameter φ7mm
Key Points in Progressive Die Manufacturing:
Ensuring that the φ1.2, Height 3mm narrow-drawn section is processed without tearing.
Designing the curling process to achieve roundness without using a core metal.
Key Points in Press Processing:
Proper handling of scrap from piercing the tip of the drawn section.
For more examples of deep drawing processing, click here:
https://www.kyowa-hearts.com/sibori/
☆ Frequently Asked Questions
https://www.kyowa-hearts.com/faq/
☆ Equipment Information
https://www.kyowa-hearts.com/setsubi/
☆ Contact & Process from Prototyping to Mass Production
https://www.kyowa-hearts.com/flow/
＜Contact Information＞
Kyowa Hearts Co., Ltd. – Rumi Sakamoto
■ Address: 1-5-1 Takata-Nishi, Kohoku-ku, Yokohama, Kanagawa, Japan
■ TEL: 045-593-6116 FAX: 045-593-6121
■ Official Website: https://www.kyowa-hearts.com
Material: Beryllium Copper C1720R-HM
Sheet Thickness: 0.15 mm
Curling Outer Diameter: φ1.1 mm
Post-Press Processing: Gold Hoop Plating
The product is the round component in the center of the image. The lower three-fifths of the vertical section is shaped into four blades, with their tips evenly and tightly pressed together.
To ensure the four blade tips are securely in contact, various techniques are applied, such as surface pressing around the blades and shaping them into a perfect circular form. The biggest challenge in the curling process is preventing twisting and eccentricity, as the connecting section to the carrier is only 0.3 mm wide and the pre-curling developed length is just 3 mm.
If you are facing difficulties with precision curling processing, please feel free to contact us.
Other Examples of Leaf Spring Products
https://www.kyowa-hearts.com/spling/
Frequently Asked Questions
https://www.kyowa-hearts.com/faq/
Equipment Information
https://www.kyowa-hearts.com/setsubi/
From Inquiry to Prototyping & Mass Production
https://www.kyowa-hearts.com/flow/
Contact Information
Kyowa Hearts Co., Ltd. – Rumi Sakamoto
Address: 1-5-1 Takata Nishi, Kohoku-ku, Yokohama, Kanagawa, Japan
TEL: 045-593-6116
FAX: 045-593-6121
Official Website: https://www.kyowa-hearts.com
Introducing Load Testing / Load Measurement Services for Leaf Springs
At Kyowa Hearts, we specialize in the processing of leaf springs.
There are several key points in quality control for leaf springs, but load is one of the most critical factors.
To achieve sufficient load capacity, fine adjustments to the product shape and careful selection of materials are essential.
We have multiple load measurement machines in-house, allowing us to collect data during the prototyping stage to assist in selecting the optimal material and sheet thickness.
Additionally, during mass production, we can measure the load of leaf springs in real time and make fine adjustments to ensure product quality.
Even if you don’t have design drawings, no problem! Reverse engineering is also available.
Feel free to contact us anytime!
☆ Frequently Asked Questions:
https://www.kyowa-hearts.com/faq/
☆Equipment Information:
https://www.kyowa-hearts.com/setsubi/
☆From Inquiry to Prototyping & Mass Production:
https://www.kyowa-hearts.com/flow/
Contact Information
Kyowa Hearts Co., Ltd. – Rumi Sakamoto
Address: 1-5-1 Takata Nishi, Kohoku-ku, Yokohama, Kanagawa, Japan
TEL: 045-593-6116
FAX: 045-593-6121
Official Website: https://www.kyowa-hearts.com
Stainless steel snap pins are widely used components in industrial equipment, known for their high durability and ease of use.
[Product Specifications]
• Materials: Compatible with SUS304, SUS316, SUS631, and other stainless steel grades
• Wire diameter range: 0.1mm to 5mm
• Corrosion resistance: Approximately 100 times more resistant than standard iron products
• Durability: Engineered for repeated use
• Feature: Easy installation and removal
[Applications]
• Automotive - Door hinges, seatbelt mechanisms
• Construction - Scaffolding fasteners, temporary structure joints
• Agriculture - Harvester part fixation, irrigation system connections
• Industrial - Conveyor belt linkages, control panel cover fasteners
• DIY - Furniture assembly, gardening tool connections
[Manufacturing Technology]
• Precise die design to mitigate springback effects
• Scheduled die maintenance program
• Strict quality control processes based on ISO 9001 standards
We specialize in precision processing of wire and strip materials, accommodating diameters from 0.1 to 5mm. Our NC-controlled manufacturing enables complex shape production.
For inquiries or custom orders, please don't hesitate to contact us.
[Company Information]
Nippon Forming Co., Ltd.
Headquarter & Main Factory: 1-23-2 Kanamachi, Katsushika-ku, Tokyo
Tsukuba Factory: 2924 Ujikai, Ishioka-shi, Ibaraki
https://www.forming.jp/eng/
Nippon Forming specializes in manufacturing stainless steel plate springs for control cable fastening, designed for use in harsh environments.
[Features]
• Use of highly durable stainless steel materials
• Customization according to customer needs
• Adaptability to various cable sizes
[Product Overview]
• Applications: Control cable fastening in factories, outdoors, and warehouses
• Material: Corrosion-resistant stainless steel
• Size: Adjustable to cable size and quantity
[Main Use Cases]
• Outdoor control cable fastening
• Factory wiring management
• Warehouse equipment cable retention
• Power facility cable management
• Wiring fastening for heavy machinery and industrial equipment
[Processing Technology]
• Materials: SUS301, SUS304, SUS316, SUS631
• Die design considering springback
• Size range: Developed length 30mm-130mm, plate width 1mm-50mm
[Nippon Forming's Strengths]
• Optimal design through detailed consultation
• Highly durable products designed for long-term use
• Products suitable for use under harsh conditions
Nippon Forming is a specialized manufacturer of precision-processed wire and strip materials.
We work with various materials ranging from 0.1 to 5mm in diameter. Complex shapes are achievable through NC control.
[Company Information]
Nippon Forming Co., Ltd.
Headquarter & Main Factory: 1-23-2 Kanamachi, Katsushika-ku, Tokyo
Tsukuba Factory: 2924 Ujikai, Ishioka-shi, Ibaraki
https://www.forming.jp/eng/
Nippon Forming specializes in designing and manufacturing durable stainless steel plate springs for LED lighting fixtures, engineered to prevent detachment.
[Features]
• Use of highly durable stainless steel materials
• Customization according to customer needs
• Long-term stable use realization
[Product Overview]
• Application: Secure fixation of LED lighting
• Materials: SUS304, SUS301, SUS316, etc.
• Shapes: Clip type, curl type, pinch type
[Main Use Cases]
• LED lighting fixture mounting
• Lighting equipment installation
• Industrial lighting fixation
• Outdoor LED device mounting
• Vehicle and building lighting fixture
[Processing Technology]
• Design considering springback
• Accommodation of complex three-dimensional shapes
• Surface treatment and plating process capabilities
[Nippon Forming's Strengths]
• Proposal of optimal materials and shapes
• Integrated support from prototyping to mass production
• Reliability ensured through high-precision processing
Nippon Forming is a specialized manufacturer of precision-processed wire and strip materials.
We work with various materials ranging from 0.1 to 5mm in diameter. Complex shapes are achievable through NC control.
[Company Information]
Nippon Forming Co., Ltd.
Headquarter & Main Factory: 1-23-2 Kanamachi, Katsushika-ku, Tokyo
Tsukuba Factory: 2924 Ujikai, Ishioka-shi, Ibaraki
https://www.forming.jp/eng/
This is a leaf spring component for communication equipment.
Processing method: Progressive pressing & riveting (4 points) using brass (t0.5) + beryllium copper (t0.15)
Product size: 7mm × 9mm × 20mm
Lot size: 1,000 or more
This product joins two different materials within the mold. After pressing, it undergoes heat treatment in our in-house facilities to enhance its spring properties.
This is a leaf spring component for communication equipment.
Processing method: Progressive pressing & riveting (2 points) using brass (t0.3) + beryllium copper (t0.1)
Product size: 8mm × 7mm × 10mm
Lot size: 1,000 or more
This product joins two different materials within the mold. After pressing, it undergoes heat treatment in our in-house facilities to enhance its spring properties.
This is a motor bracket component for communication equipment.
Processing method: Progressive pressing & riveting using stainless steel (SUS), 0.2mm thickness
Product size: 8mm × 5mm × 5mm
Lot size: 10,000 or more
Key feature: The material is rolled into a cylindrical shape and joined from a single sheet.
This product is riveted using stainless steel plates of different thicknesses.
Riveting adhesion strength: Maintains 8.2N or more
Processing method: Progressive die pressing, ensuring stable product quality
Product size: Approximately 8.65 × 6.025mm
Stainless steel thickness: t0.25 & t0.35
The plate is drawn, and the drawn edge is split along the outer perimeter, forming a three-dimensional integrally molded piece.
