熊谷精機 List of Products and Services

Using the "precision shearing processing technology" that we have cultivated over many years, we can suppress "dulling" while ensuring a clean shear surface. This technology allows us to achieve shear surfaces comparable to fine blanking using general-purpose press machines. We can accommodate precision shearing processing with both progressive and single-stroke presses. We will propose a mold method tailored to your quantity lot. Precision shearing processing is a challenging technology to maintain in good production condition, but we are committed to thorough product checks during production and mold maintenance to ensure quality control. 【Features】 ■ Suppresses dulling while ensuring a clean shear surface. ■ We propose shapes that are usually difficult to process but can be achieved with pressing. ■ Trust us with precision shearing processing for material thicknesses up to 6mm. *For more details, please download our catalog or case studies, or feel free to contact us.

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We solve your concerns regarding press parts, such as "I want to transfer the molds from overseas production to domestic press processing." If you want to produce press parts that were previously manufactured overseas domestically, it is possible to consider production by transferring the molds to our company. For old molds that have been in use for a long time, we can also propose mold rationalization or updates if necessary. Please feel free to contact us first. 【Features】 ■ Even for small lot processing, we can reduce mold costs through single press processing. ■ We handle everything from the transfer of existing molds to proposals for mold rationalization and updates. *For more details, please refer to the related links or feel free to contact us.

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We solve the concerns of the agricultural and construction machinery industries regarding whether there are cost benefits to producing approximately 500 parts through high-press processing. For small lot production, we propose production using single-stroke press processing. With single-stroke molds, we can keep the initial costs down while performing press processing. Our precision shearing press processing, optimized for clearance, minimizes quality variation with stable accuracy compared to other methods such as cutting, allowing us to produce press parts that customers can use with confidence. 【Features】 ■ Even for lots of around 500 pieces, we can reduce mold costs through single-stroke press processing. ■ By transitioning from methods like cutting, we achieve cost reduction while maintaining accuracy. ■ We support everything from the transfer of existing molds to proposals for mold rationalization and updates. *For more details, please refer to the related links or feel free to contact us.

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Kumagai Seiki Co., Ltd. solves the concerns regarding press parts, such as "We want to manufacture high-precision cam parts, but we would like to consider whether we can do it with press processing." Instead of manufacturing molds for mass production from the beginning, we conduct shape and function verification starting with prototype processing using simple molds. In the simple molds, the base die set uses common components, and we adopt a "nested" format that allows for the replacement of parts such as punches and dies according to the shape and size of the parts being manufactured. This allows us to keep costs down while conducting prototype pressing using molds. For those who want to verify the feasibility of production and shape confirmation through press processing, we first propose prototyping using simple molds. 【Features】 ■ Cost reduction through conversion from other processing methods such as cutting ■ Cost advantages of press processing due to increased processing lot numbers ■ Prototyping using simple molds with consideration for mass production *For more details, please refer to the related links or feel free to contact us.

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• Other industrial robots

We solve the concerns of the industrial equipment and robotics industry regarding press parts, as "a considerable number of gear and cam parts are needed, and we are considering the optimal manufacturing method." In the case of a lot of about 3,000 pieces, machining requires a significant amount of setup time, and this long lead time is also reflected in the cost. The more complex the shape, the longer it takes and the higher the cost. If using press processing with molds, once the mold is made, it is possible to efficiently produce parts with stable quality. Please feel free to contact us first. 【Features】 ■ Cost reduction through conversion from other methods such as machining ■ Advantages of press processing that arise from lots of over 3,000 pieces ■ Prototyping with simple molds considering mass production *For more details, please refer to the related links or feel free to contact us.

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• Other industrial robots

We solve the concerns of customers regarding press parts, such as "I want to reduce costs for functional parts that were traditionally made through cutting processes, but I don't know how." We will ask customers in detail about the specifications, applications, and assembly components of the parts, and while reconsidering the precision that customers truly need, we will provide optimal proposals. While the benefits may vary depending on the quantity lot, we will achieve cost reduction by transitioning from different manufacturing methods. Please feel free to contact us first. 【Features】 ■ Cost reduction through transitioning from different manufacturing methods such as cutting processes ■ The advantages of press processing can be utilized as the number of processed lots increases. ■ If there are concerns, we will conduct prototype testing with simple molds in anticipation of mass production and evaluate quality. *For more details, please refer to the related links or feel free to contact us.

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• Other industrial robots

Kumagai Seiki Co., Ltd. addresses the concerns of the automotive industry regarding press parts, such as "some components are manufactured through cutting or fine blanking, but we want to reduce costs further." Given the high production volumes in the automotive sector, even a slight reduction in costs can lead to significant benefits. To assist customers in this industry, we propose a review of processing methods. Our precision shear press processing can achieve equivalent shear surfaces while minimizing burrs compared to fine blanking. Additionally, by combining cold forging and precision shear press processing, we can create shapes that were previously considered difficult to achieve with traditional pressing. 【Features】 ■ Precision shear press processing through shaving ■ Proposals for rationalizing press processing using precision shearing and cold forging technology ■ Cost reduction through method conversion from cutting and fine blanking *For more details, please refer to the related links or feel free to contact us.

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• Other Auto Parts

We solve the concerns of the automotive industry regarding press parts, such as "I want precision press processing according to the drawings, but I can't find a supplier that can perform precision press processing on high-tensile materials." We also accommodate cold forging, enabling shapes that cannot be achieved solely with precision shearing technology by applying cold forging techniques. By combining two technologies in the layout of progressive dies, we can propose solutions that lead to cost reduction and shorter lead times. Please feel free to contact us. 【Features】 ■ Precision shearing press processing through shaving ■ Proposals for rationalizing press processing using precision shearing and cold forging technologies ■ Cost reduction through the transition from cutting processes and fine blanking *For more details, please refer to the related links or feel free to contact us.

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• Other Auto Parts

At Kumagai Seiki Co., Ltd., we solve the challenges of press parts in the automotive industry, aiming to "reduce burrs to achieve thinner and lighter products." We specialize in high-precision press processing through precision shearing, and our commitment to shaving processing allows us to achieve finishes with accuracy as per the drawings. By setting appropriate clearances and performing shaving processing, we can obtain clean and smooth "shear surfaces" without burrs. 【Features】 ■ Precision shearing press processing through shaving ■ Proposals for rationalizing press processing using precision shearing ■ Cost reduction through method conversion from cutting processing and fine blanking *For more details, please refer to the related links or feel free to contact us.

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• Other Auto Parts

This document provides an explanation for designers and engineers on "Key Points for Cost Reduction through the Transition from Fine Blanking to General Pressing." It includes common issues faced by customers considering fine blanking products and points for cost reduction. Additionally, it presents examples of cases where a 30% cost reduction was achieved by transitioning from fine blanking to general pressing. [Contents (Excerpt)] ■ Common Issues ■ Key Points ■ Our Features ■ Technical Proposal Examples ■ Product Examples *For more details, please download the PDF or feel free to contact us.

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This document introduces examples of precision shearing processing and processing methods for designers and engineers. It includes basic knowledge about the differences between shearing and precision shearing, as well as examples of processing using progressive and single-stroke presses. Additionally, it covers various processing methods such as "small" clearance processing and fine blanking. We encourage you to read it. [Contents] ■ Basic knowledge about precision shearing ■ Examples of precision shearing ■ Publisher information *For more details, please download the PDF or feel free to contact us.

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This document introduces "Key Points for Reducing Gear Manufacturing Costs through Precision Shearing" for designers and engineers. It includes common concerns related to gears, such as "I want to mass-produce high-quality gears" and "I want to reduce gear costs at all costs," along with points for cost reduction. Additionally, we present examples where material changes and process transitions led to a 40% cost reduction. We encourage you to read it. [Contents (Excerpt)] ■ Common Concerns ■ Key Points ■ Our Features ■ Technical Proposal Examples ■ Product Examples *For more details, please download the PDF or feel free to contact us.

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This document introduces "Key Points for Cost Reduction through the Transition from Precision Machining to Press Processing" for designers and engineers. It includes points for cost reduction through the transition to press processing, as well as features of the transition service. Additionally, it provides detailed case studies of products that successfully transitioned to mass production through press processing. 【Contents (Excerpt)】 ■ Common Issues ■ Key Points ■ Our Features ■ Technical Proposal Examples ■ Product Case Studies *For more details, please download the PDF or feel free to contact us.

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In pressed products, the expression "no burrs" is often used in drawings. Burrs, also referred to as "flashes," are formed as sharp protrusions along the extension of the fracture surface of sheared products. The quality of pressed products is often judged based on the presence of burrs and flashes, with their height frequently determining the quality assessment. Since they reflect the wear condition of the cutting tools (punches) well, they also serve as an indicator for determining the timing of mold maintenance. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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A mold is typically a tool used for mass-producing products through processes such as resin molding, press processing, forging, and casting. Among them, a "simple mold" refers to a basic press mold that is suitable for cases where small-lot production is needed before creating a mass production mold, or when one wants to prototype to verify shape and functionality. For products with high difficulty, mold design aimed at mass production is required, along with the need to minimize troubles during mass production to create highly productive molds. *For detailed content of the column, you can view it through the related links. For more information, please feel free to contact us.*

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• Mold Design
• Prototype Services

Shaving processing is a term used in press processing, where the cut edge created by a punching press is further processed by pressing again to remove the surface and achieve a smooth and highly precise cross-section. It is common to shave (press) from the flared side of the press cross-section towards the burr side. When the plate thickness increases, a single shaving may not be sufficient, so multiple shavings may be necessary. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.

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First, in press processing and sheet metal work, "dabo" refers to a non-through protrusion shape created by applying pressure to a part of the material using a mold. Dabo forming refers to the process of shaping a convex shape (protrusion) on a metal sheet, primarily used for positioning in the welding or assembly of metal parts, and this convex shape is called "dabo." In addition to being used for positioning parts, dabo can also serve functions such as a stopper. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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"Precision shearing" and "cold forging" are separate techniques in press processing, but by applying both techniques within a single mold, it becomes possible to achieve shapes and precision that are difficult to realize with conventional press processing. At our company, we can process products that involve crushing materials into the required shape while finishing the sides of the product with precision shearing. There are limitations on the shapes we can accommodate, but we believe this is an effective option when considering the rationalization of machined products. *For more details, you can view the related links. Please feel free to contact us for more information.

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Fine blanking (FB processing) is a press processing technology that performs blanking (punching) with precision. This principle is based on the "hydrostatic effect," which states that applying pressure to metal increases the force of plastic deformation. In general press processing, the workpiece is placed on the die, and pressure is applied with a punch to perform the blanking; during this process, an appropriate gap (clearance) between the die and the punch is necessary. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.

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If there are no instructions on the drawing, the finish of the "shear surface" for standard pressed parts is not considered important. So, in what cases is a "clean shear surface" necessary? While we may not know the specific applications of the parts, we will consider this based on information from our customers. For the products we manufacture, there are often instructions regarding the "shear surface" on the drawings, such as "ensure over 70% shear surface" or, conversely, expressions like "the combined area of the fracture surface and the droop surface should be 30% or less." *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

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It is not often that the "surface roughness" of the shear surface is required, but when looking at the shear surfaces of typical pressed products, it can be confirmed that "vertical lines" are present. Among the products we manufacture through pressing, there are parts with gear shapes and cam shapes. When producing such functional parts through pressing, the finish of the shear surface becomes important. Since it serves as the contact surface and sliding surface with counterpart parts, achieving a shear surface without irregularities can lead to smoother engagement and sliding with the counterpart parts, resulting in products that excel in wear resistance and contribute to quiet operation. *For more detailed information, please refer to the related links. Feel free to contact us for more details.

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In press processing, shearing is a method used for cutting metal sheets. There are various types of shearing processes, such as drilling, punching, and notching, but it can be said that press processing is composed of combinations of "shearing processes." Shearing is a method of cutting by applying pressure to a metal sheet using a pair of upper and lower molds. It may be easier to understand if you imagine replacing the principle of "cutting paper with scissors" or "making holes with a punch" with a metal sheet. *For more detailed information, you can view the related links. Please feel free to contact us for more details.

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Machining by cutting allows for high precision finishing, but requires a certain amount of processing time. Compared to cutting, press processing is inferior in terms of precision, but it excels in production efficiency. If parts that were previously manufactured by cutting can be produced using press processing, significant cost reductions can be expected. *For more details on the column, please refer to the related links. For further inquiries, feel free to contact us.*

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In recent years, the demand for high-tensile materials has been increasing due to the need for lightweight components in automobiles and other applications. Compared to standard materials, high-tensile materials can achieve weight reduction while maintaining strength; however, their strength also leads to higher forming loads, making processing more difficult. This column provides detailed information about what high-tensile materials are, along with their advantages and disadvantages. *For more details, you can view the related links. Please feel free to contact us for further information.*

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In press processing, there is a basic technique called "shearing," which refers to cutting a sheet of material using a pair of upper and lower molds. This processing is aimed at the action of "cutting" the material, and there are various types of shearing processes, ranging from simple cutting to drilling, punching, and notching. The mechanism involves placing the metal material on the die (the lower mold) and applying pressure from above with a punch (the upper mold), thereby cutting it by applying a force that cannot maintain its original state. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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This is a technical proposal case for the production of seatbelt components. The products in this case were traditionally produced using fine blanking. As they are related parts for automotive seatbelts, they were manufactured in various locations around the world. However, fluctuations in exchange rates significantly affected prices, leading to the challenge of wanting to reduce costs. Therefore, we proposed a method transition to general press processing using cold forging and precision shearing. This achieved a 30% cost reduction while maintaining the same level of precision as fine blanking. [Case Summary] ■ Before Proposal: Produced using fine blanking ■ Effect: 30% cost reduction through method transition to general press *For more details, please refer to the related links or feel free to contact us.

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This is a technical proposal example for the production of luggage gears. In this case, the product was initially considered for gear production using hob machining. However, hob machining posed a problem of high costs due to the impact of takt time and material costs. Therefore, we proposed a method transition from traditional hob machining to transfer press processing. This achieved a 30% cost reduction and a 50% reduction in lead time. [Case Overview] ■ Issue: Material costs are high with hob machining ■ Effect: Transitioning to progressive press processing resulted in a 30% cost reduction *For more details, please refer to the related links or feel free to contact us.

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This is a technical proposal example for the production of driven gears. In the case of the product mentioned here, the conventional method required component strength, so after machining with S45C material, heat treatment was performed to achieve the necessary strength. However, due to the product's weight (300g), there were challenges regarding the cost of heat treatment. Therefore, we proposed a method transition to "780 high-tensile material" combined with precision shearing processing. This allowed us to manufacture a product that previously took three days in just a few hours, achieving a 40% cost reduction as a result. [Case Overview] ■ Before Proposal: Ensured strength through heat treatment ■ Effect: 40% cost reduction by eliminating heat treatment through material change to "780 high-tensile material" *For more details, please refer to the related links or feel free to contact us.

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This is a technical proposal example for the production of sheet frames. The product in this case was initially designed with machining drawings and was planned to be manufactured through machining. The expected monthly production was 2,000 to 3,000 units, but there was a challenge that production through cutting processes would result in high costs. Therefore, we proposed a method transition from cutting to press processing through cold forging. This led to a 40% reduction in costs. [Case Overview] ■Challenge: High costs with cutting processes ■Effect: 40% cost reduction through method transition to press processing *For more details, please refer to the related links or feel free to contact us.

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This is a case study of a technical proposal for sim ring manufacturing. Due to the customer's request to reduce procurement costs since product processing is outsourced, we received an inquiry about whether it was possible to maintain the same quality as fine blanking products while processing them with a press. In response, we proposed a method that combines cold forging and precision shearing press technology. By converting fine blanking to general press processing, we achieved a 40% cost reduction. [Case Overview] ■ Challenge: To achieve cost reduction while maintaining quality ■ Effect: 40% cost reduction through conversion to general press processing *For more details, please refer to the related links or feel free to contact us.

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This is a technical proposal example for the production of color frames. In conventional methods, the processing of parts before welding and the welding work required significant man-hours and lead time, along with strict requirements for product dimensions and precision, which led to challenges such as prolonged lead times and high costs. We proposed a shift from a method that involved welding multiple parts to an integrated processing method using progressive stamping and cold forging. This achieved a 30% cost reduction and a 50% reduction in lead time. [Case Overview] ■ Challenge: Production through welding of multiple parts ■ Proposal: Integration of multiple parts through a shift to progressive stamping *For more details, please refer to the related links or feel free to contact us.

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This is a technical proposal example for the production of strikers. In this case, the product was traditionally manufactured using a single press process involving 10 steps. There was a need to produce 3,000 units per month, but there was a problem with a low yield rate, and additionally, the labor and lead time required for the 10 steps of single press processing made the production very labor-intensive. By switching from the 10-step single press process to progressive press processing combined with machining, we achieved a 40% cost reduction and a 70% reduction in lead time. [Case Overview] ■ Issue: We want to reduce labor and lead time. ■ Effect: By converting from single press processing to progressive press processing, we achieved a 70% reduction in lead time. *For more details, please refer to the related links or feel free to contact us.

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This is a case study of a technical proposal for the production of polished processed products. In this case, the product was traditionally produced by polishing both sides after press production. Since the thickness was outside the tolerance range with just regular press processing, double-sided polishing was necessary to guarantee the thickness, but this posed challenges due to the labor involved and high costs. By using re-rolled material for press processing, we eliminated the need for polishing, resulting in a 30% cost reduction. [Case Overview] ■Challenge: Is it possible to perform press processing with precision that eliminates the need for polishing? ■Effect: Transitioning to press processing of re-rolled material with managed thickness resulted in a 30% cost reduction. *For more details, please refer to the related links or feel free to contact us.

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This is a case study of a technical proposal that transitioned from cutting processing to press processing. In this case, the product was traditionally produced through cutting processing. Due to an annual lot size of about 5,000 units, there were challenges regarding lead time and processing costs in cutting processing. Given the annual lot quantity of around 5,000 units, we intentionally assumed a single press process and designed the process to eliminate distortion by performing multiple finishing operations on the sides. [Case Overview] ■Challenge: We want to convert approximately 5,000 cutting processed products to press processing. ■Effect: By converting to press processing, we achieved a 40% reduction in lead time and a 30% reduction in costs. *For more details, please refer to the related links or feel free to contact us.

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This is a technical proposal example that includes a progressive die with dish-shaped reaming processed by cold forging. In this case, the product underwent dish-shaped reaming at two locations after pressing. However, there were challenges related to the lead time and cutting costs associated with secondary machining. To process the dish-shaped reaming while leaving the pilot holes, there was a concern that the roundness of the holes would be compromised. By adding a finishing process for the holes at the end, mass production was achieved. [Case Overview] ■Challenge: Lead time and cutting costs for secondary machining of dish-shaped reaming after pressing ■Proposal: Progressive die including dish-shaped reaming processed by cold forging *For more details, please refer to the related links or feel free to contact us.

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This is a technical proposal case aimed at rationalizing reaming processes for products that underwent reaming finishing after press processing. In this case, the product required precise hole diameters, and reaming finishing was performed after pressing. However, there were challenges related to the lead time and machining costs associated with secondary cutting. By setting an appropriate production lot size based on production performance and regularly maintaining the cutting tools used for finishing the reamed holes, stable mass production was achieved. 【Case Overview】 ■Challenge: Lead time and machining costs associated with reaming finishing after pressing ■Proposal: Progressive die including reaming finishing through precision shearing processing *For more details, please refer to the related links or feel free to contact us.

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Our company is capable of plate forging processes that include reduction and increase of material. This plate forging technology enables the realization of complex shapes that are difficult to achieve with conventional pressing methods. Additionally, by combining this plate forging technology with precision shearing techniques, we can also accommodate high-value-added pressed products. 【Features】 ■ Achieves shapes that are difficult with conventional pressing ■ Realizes shapes that are challenging to process with "cutting and bending" in pressing ■ Rationalization proposals tailored to the required products *For more details, please refer to the related links or feel free to contact us.

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Our company offers press processing for various quantities, from small lots to mass production. For small lots, we provide "single press processing," and when a certain quantity is reached, we can suggest "progressive press processing," among other methods, based on the quantity. We will propose the most suitable methods based on our accumulated experience and know-how to meet your needs, so please feel free to consult with us. 【Features】 ■ Proposing appropriate molds and processing methods according to quantity ■ Rationalization proposals based on the required products ■ Producing molds with excellent mass production capabilities using simple molds *For more details, please refer to the related links or feel free to contact us.

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• Mold Design

At our company, by applying the technologies of "precision shearing" and "cold forging," we have handled a large number of press-processed products that require extremely high precision. In cases where it is difficult to determine the feasibility of processing due to complex shapes, we conduct shape verification and productivity testing through prototypes before creating mass production models, ensuring a reliable transition to mass production. If you have shapes that seem difficult to process, please feel free to consult with us. 【Features】 ■ Achieves high-precision press processing that cannot be handled by conventional press processing. ■ Capable of accommodating difficult shapes; we will consider the shapes requested by our customers. ■ Significant cost reductions achieved by switching from other processing methods. *For more details, please refer to the related links or feel free to contact us.

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Our company has numerous achievements in significantly reducing costs by transitioning from fine blanking processing to general press methods. By leveraging our unique know-how and shaving processing technology developed over many years, we achieve the same level of precision and shear surface as fine blanking processing using general press processing. We provide high-precision products that our customers can use with confidence. 【Features】 ■ Cost reduction achieved through the transition to general press methods ■ Products manufactured with precision equivalent to fine blanking processing ■ Stable quality guaranteed through 100% inspection *For more details, please refer to the related links or feel free to contact us.

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Our company has been engaged in the press processing of numerous high-tensile materials (high-strength steel plates) to date. Thanks to the technical expertise we have cultivated over many years, we can design appropriate processes for our products. By leveraging our overwhelming experience and know-how, we can achieve clean shear surfaces even with high-strength 780 high-tensile materials. Additionally, we can partially shear products with cam shapes, and we also consider composite processing that combines cold forging technology. Even if other companies find it difficult to process, please feel free to consult with us. [Features] ■ Producing high-precision press-processed products even from difficult-to-process high-tensile materials ■ Responding to needs for weight reduction and functional enhancement through material changes ■ Accommodating prototypes and small lot production *For more details, please refer to the related links or feel free to contact us.

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Our company is capable of securing the shear surface of gear teeth while suppressing "dulling" through "precision shearing processing." This technology achieves a shear surface comparable to fine blanking, and while it does not reach the precision of machined gears, it is possible to produce gears with the required precision using general-purpose press machines, depending on the specifications. We conduct visual inspections of all products in most precision shearing processed items, minimizing the risk of defective products being released. 【Features】 ■ Production of high-quality gears without dulling through precision shearing processing ■ Assurance of stable quality through visual inspection of all products ■ Cost reduction achieved by transitioning from traditional methods *For more details, please refer to the related links or feel free to contact us.

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Our company has a proven track record of significantly reducing costs and shortening lead times by transitioning from cutting processes to pressing processes. At Seimitsu Senkan Press Processing.com, we flexibly accommodate small lots of around 100 units per month to mass production of over 1 million units. Costs will vary depending on quantity, but we can process according to your desired lot size. For small lots, we offer single press processing, and for larger quantities, we can provide progressive press processing. We will propose the appropriate processing equipment and methods based on quantity and product shape. [Features] ■ Achieves significant cost reduction and lead time shortening ■ Supports not only mass-produced items but also small lot items ■ Capable of handling difficult shapes, manufactured to the precision and shape requested by the customer *For more details, please refer to the related links or feel free to contact us.

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Kumagai Seiki Co., Ltd. has been making daily efforts since its founding in 1961 to ensure stable production activities for our customers through the manufacturing of metal parts molds and press processing. We propose method transformations and yield improvements with reliable technology and free thinking. We strive for continuous improvement of our systems to provide products of quality that our customers can use with confidence, and we practice production support that meets our customers' expectations and needs. 【Business Content】 ○ Design and manufacturing of press processing molds for automotive, computer, semiconductor equipment-related, and metal parts / double-sided polishing / design and manufacturing of jigs and tools. For more details, please contact us or download the catalog.

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• Mold Design