株式会社　精和工業所 Product Lineup

"If you are having trouble with stainless steel welding, leave it to us." Seiwa Industrial Co., Ltd. specializes in welding technology for thin stainless steel sheets and possesses various processing techniques and advanced expertise as a welding and joining specialist. With high technical skills and abundant know-how, we have established advanced welding processes based on years of proven experience, covering everything from sheet metal processing to final assembly. In particular, our welding processing for storage tanks is widely used in domestic electric water heaters and heat pump water heaters by ensuring corrosion resistance and the strength of the welded joints. Our technical capabilities range from TIG welding of 0.3mm thickness to fiber laser welding for ultra-thin shapes requiring thicknesses below 0.1mm. We utilize a variety of welding methods, including TIG, fiber laser, and robotic welding, tailored to the structure and material properties of the products. Additionally, to balance quality and high productivity, we actively utilize dedicated jigs and automation equipment designed and manufactured by our in-house production technology department. If you are having trouble with welding processing, please take a look using the download button. Feel free to contact us as well.

In the aerospace industry, reducing the weight of aircraft is essential for improving fuel efficiency and performance. In particular, the adoption of thin sheet metal components is increasing to achieve weight reduction while maintaining strength. However, welding thin sheet metal requires advanced technology, and ensuring quality is a challenge. Our integrated production system for 0.1mm ultra-thin sheets has been developed to meet the needs for weight reduction in the aerospace field. [Application Scenarios] * Aircraft components * Space exploration vehicle components * Rocket components [Effects of Implementation] * Improved fuel efficiency due to weight reduction * Enhanced durability of components * Increased design flexibility

In the energy industry, heat exchangers require high thermal efficiency and durability. Especially as energy conservation progresses, miniaturization and high performance of heat exchangers are essential. Heat exchangers made from thin stainless steel contribute to weight reduction, but welding technology becomes crucial. Poor welding can lead to decreased thermal efficiency and shortened product lifespan. Our welding technology for 0.1mm ultra-thin sheets contributes to the performance improvement of heat exchangers. 【Application Scenarios】 - Manufacturing of heat exchangers - Products requiring thin stainless steel welding - Companies aiming for energy conservation 【Effects of Implementation】 - Improved product reliability through high-precision welding - Weight reduction and high performance through thin sheet design - Optimal product design through diverse welding methods

In the food processing industry, hygiene equipment requires high cleanliness and durability. Particularly in areas that come into direct contact with food, advanced welding techniques are essential to avoid the risk of gaps and uneven surfaces in welds becoming breeding grounds for bacteria. Our integrated production system, capable of handling 0.1mm ultra-thin sheets, addresses these challenges by establishing a hygienic environment through high-quality welding and strict inspections. 【Usage Scenarios】 - Piping for food manufacturing lines - Storage tanks - Cleaning equipment 【Benefits of Implementation】 - Maintenance of high cleanliness - Improvement in product quality - Extension of equipment lifespan

In the chemical plant industry, the durability and safety of reaction vessels are the most critical issues. Particularly in environments exposed to corrosive substances and high pressure, the quality of welds significantly affects product lifespan and safety. Welding defects can lead to leaks and explosions, potentially resulting in substantial losses. Our 0.1mm ultra-thin sheet welding solution addresses these challenges through advanced welding technology and stringent quality control. 【Application Scenarios】 - Reaction vessels - Chemical storage tanks - Various piping 【Benefits of Implementation】 - Achieves high corrosion resistance and strength - Improves product reliability - Ensures safety - Reduces costs

In the telecommunications equipment industry, particularly in antenna manufacturing, precise component processing is required to maximize the efficiency of radio wave transmission and reception. Antennas demand fine structures and high precision, and the quality of welding significantly affects product performance. Welding technology for ultra-thin sheets of less than 0.1mm is essential for miniaturization and high performance of antennas. Our welding technology for 0.1mm ultra-thin sheets contributes to quality improvement and reliability assurance in antenna manufacturing. 【Application Scenarios】 - Antenna manufacturing - Telecommunications component manufacturing - High-frequency device manufacturing 【Benefits of Implementation】 - Improved product performance through high-precision welding - Increased design flexibility by accommodating thin sheet materials - Enhanced customer satisfaction through the provision of high-quality products

In the food machinery industry, the safety and hygiene management of products are the most important issues. In particular, areas that come into direct contact with food can have gaps and unevenness in welds that become breeding grounds for bacteria, potentially increasing the risk of product quality deterioration and food poisoning. Our products address these challenges through thin plate stainless steel welding technology starting from 0.3mm. We achieve high precision and a smooth finish, providing high-quality components that meet the hygiene standards of food machinery. 【Application Scenarios】 - Various tanks in food manufacturing lines - Conveyor components for food transport - Casings for food processing machines - Kitchen equipment 【Benefits of Implementation】 - Achieving high hygiene standards - Improving product quality - Enhancing cleanability - Reducing the risk of foreign matter contamination

We would like to introduce our "Medium-sized Stainless Steel Storage Tank" that we handle. This product is designed for medium capacity use in commercial, industrial, and household applications. By using it in conjunction with boilers and heat source equipment, it achieves stable hot water supply and energy-efficient operation. We will propose the optimal plate thickness according to the usage and conditions. Please feel free to contact us when you need assistance. 【Features】 ■ Stable hot water supply even in high-demand environments ■ Ability to propose the optimal material and plate thickness based on usage ■ High insulation performance that enables energy-efficient operation ■ Numerous achievements in updating and replacing existing equipment ■ Proven track record of supply to major home appliance manufacturers ■ Continuous implementation of rationalization proposals at least once a year *For more details, please download the PDF or feel free to contact us.

Our company handles everything from sheet metal processing to welding and quality control for shipping of "stainless steel enclosures for environmental testing equipment" and "stainless steel sheet metal enclosures for testing equipment." We provide in-house support from sheet metal processing to TIG welding. We can accommodate prototypes, small lots, and mass production, and special specifications can also be discussed. We solve issues such as concerns about welding quality and appearance quality, as well as the complexity of managing dispersed processing locations. We can introduce companies considering the purchase of environmental testing equipment to Espec Corp. *Photo provided by Espec Corp. 【Features】 ■ Supports TIG welding of stainless steel thin plates ■ High appearance quality *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we provide processing that suppresses distortion, which is a problem in the welding of thin stainless steel, while achieving both dimensional accuracy and appearance quality. Our customers have faced challenges such as interference and gaps during assembly, as well as the time and effort required for correction work. By comprehensively optimizing welding conditions, jigs, and process design, we contribute to stable quality and reduced downstream processes. 【Customer Challenges and Requests (Partial)】 ■ Dimensional accuracy is not achieved due to welding distortion ■ Bending, warping, and twisting occur ■ Interference and gaps arise during assembly ■ Correction work requires time and effort ■ Quality variation occurs due to correction *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we provide processing that suppresses burn and discoloration occurring during welding, achieving both aesthetic quality and functionality. We address challenges such as increased post-processing labor and the inability to use parts as design components. We minimize post-processing, contributing to cost and labor reduction. 【Customer Challenges and Requests (Partial)】 ■ Appearance defects due to welding burn ■ Generation of oxide scale ■ Increased labor for post-processing (pickling and polishing) ■ Inability to use as design components ■ Decreased product value and impression *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we achieve a high-quality finish in the welding processing of thin stainless steel that does not compromise its design integrity. We can solve issues such as distortion being emphasized by reflections, leading to customer complaints, and the inability to secure a uniform appearance. Please feel free to contact us when you need our services. 【Customer Challenges and Requests】 ■ Waves and distortions are prominent ■ Distortion is emphasized by reflections ■ Visual quality affects product value ■ Cannot be used as design components ■ Leads to customer complaints ■ Unable to secure a uniform appearance *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we achieve high precision dimensions through processing design that anticipates deformation caused by welding. We solve issues such as interference during assembly and the need for reprocessing or adjustments. By considering the assembly process, we prevent defects before they occur. 【Customer Challenges and Requests】 ■ Dimensions change after welding ■ Parts do not fit together ■ Interference occurs during assembly ■ Reprocessing or adjustments are necessary ■ Inspection failures occur *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we minimize correction work by enhancing welding accuracy, achieving improved productivity and stable quality. We address challenges such as reliance on manual labor, poor production efficiency, and low reproducibility of finishes. Please feel free to contact us when you need our services. 【Customer Challenges and Requests】 ■ Correction takes time ■ Reliance on manual labor ■ Significant quality variation ■ Poor production efficiency ■ Low reproducibility of finishes *For more details, please download the PDF or feel free to contact us.

At Seiko Engineering, we possess high-precision technology capable of welding ultra-thin stainless steel, achieving a balance of strength and precision in processing. We address challenges such as melting and hole formation, susceptibility to deformation, and difficulty in ensuring strength. Please feel free to contact us when you need assistance. 【Customer Challenges and Requests】 ■ Melting and hole formation occur ■ Susceptible to deformation ■ Difficulty in ensuring strength ■ Unable to find a processing partner ■ Many issues in prototypes *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we ensure stable quality even for complex-shaped products and achieve highly reproducible welding processes. We address issues such as unstable quality due to shape, unreadable distortion, and complex processes. Please feel free to contact us when you need our services. 【Customer Challenges and Requests】 ■ Unstable quality due to shape ■ Unreadable distortion ■ Complex processes ■ Increased costs ■ Low reproducibility *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we contribute to cost reduction and shorter delivery times by improving welding quality and streamlining the finishing process. We will address challenges such as high polishing labor, high costs, and heavy workloads. Please feel free to contact us when you need assistance. 【Customer Challenges and Requests】 ■ High polishing labor ■ High costs ■ Heavy workload ■ Inconsistent finishing ■ Extended delivery times *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we make proposals during the design phase from the perspective of the manufacturing site to prevent distortion and processing defects before they occur. We solve issues such as distortion occurring when following the drawings, design changes arising, and discrepancies between prototypes and mass production. We simultaneously achieve quality improvement and reduction of rework. 【Customer Challenges and Requests】 ■ Defects are discovered after completion ■ Distortion occurs when following the drawings ■ Design changes arise ■ Discrepancies between prototypes and mass production ■ Difficulty in predicting man-hours and costs *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where Seiwa Kogyo Co., Ltd. thoroughly eliminated variations in the process and achieved stable quality. We addressed challenges such as variations in finish depending on the operator and increased defect rates during mass production. Through consistent condition management and standardization from prototype to mass production, we guarantee the same quality even when the person producing changes. 【Customer Challenges and Requests】 ■ There are variations in quality, and it is unstable. ■ The finish varies depending on the operator. ■ The defect rate increases during mass production. ■ Results cannot be reproduced even under the same conditions. ■ Quality complaints and rework occur. *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we provide a consistent response from sheet stainless steel processing and welding to inspection and shipping, establishing a mass production system that balances stable quality and productivity. We address challenges such as variations in quality during mass production and distortions or dimensional discrepancies occurring from processing to welding. By optimizing processes, we contribute to stable supply with reduced variations and a decrease in subsequent processes. 【Customer Challenges and Requests (Partial)】 ■ Variations in quality occur during mass production ■ Distortions and dimensional discrepancies occur from processing to welding ■ Many defects and rework during assembly ■ Prototypes were good, but quality is not stable in mass production ■ Management is complicated due to different outsourcing partners for each process ■ Unable to respond to delivery delays or sudden increases in production *For more details, please download the PDF or feel free to contact us.

At Seiko Industrial, we consistently implement everything from material selection to welding processing and evaluation, conducting quality design based on "on-site standards" that are tailored to actual usage environments. We solve challenges such as the inability to determine whether materials are appropriate for the usage environment and unclear causes of problems stemming from materials. We contribute to ensuring reliability through evaluations based on actual products and achieving stable quality with an eye toward mass production. 【Customer Challenges and Requests】 ■ Inability to determine whether materials are appropriate for the usage environment ■ Occurrence of issues due to corrosion or deterioration ■ Risk of damage due to insufficient strength or pressure resistance ■ Quality discrepancies between prototypes and mass production ■ Unclear causes of problems stemming from materials ■ Balancing performance and cost is a challenge *For more details, please download the PDF or feel free to contact us.