ミヤマ精工 List of Products and Services

We would like to introduce a development case of cold forging of fuel injector parts (complex-shaped products). For general products, cold forging + welding + machining is performed, resulting in a yield of 55%. In the developed product, we implemented a reduction of the machined section by using a through-hole method for small-diameter deep holes, achieving a yield of 79%. 【Development Objectives】 ■ New Method: Application of the through-hole method for small-diameter deep holes ■ Yield Improvement: Reduction of the machined section through the use of small-diameter deep holes ■ Novelty: Cold forging of hollow cylindrical products *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a case study on the development of cold forging for difficult-to-process material SUS440C. In the past, even if there were ideas for performance improvement in customer products, it was impossible to realize them due to the complex shapes that made machining difficult. (It was a different shaped product.) The developed product underwent cold forging and machining, resulting in improved product performance. Please feel free to contact us when you need assistance. 【Development Objectives】 ■ New Method: Cold forging of non-axisymmetric complex shapes ■ Product Performance Improvement: World-class performance of fuel injection systems ■ Novelty: Cold forging of martensitic stainless steel *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a case study on the development of cold forging for difficult-to-process materials. In conventional products, machining was performed from bar or pipe materials. The developed product underwent cold forging in three processes plus grinding of both end faces. The cost of the conventional product is set at 100%, while the developed product is at 80%. Please feel free to contact us when you need our services. 【Development Objectives】 ■ New Method: Inner and Outer Diameter Cold Forging Finish ■ Improved Yield: Elimination of Machining for Inner and Outer Diameters (Grinding of Both End Faces) ■ Novelty: Cold Forging of Austenitic Stainless Steel *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a development case for deburring the inner holes of injector components. We adopted a new method for penetrating small-diameter deep holes using diameter-reducing extrusion, achieving non-cutting of the inner diameter through small-diameter deep hole penetration, which improved precision and cleanliness. Additionally, we eliminated punching in the intermediate section of the small-diameter deep hole. The coaxiality improved from φ0.15 to φ0.05. 【Development Objectives】 ■ New Method: Penetration of small-diameter deep holes using diameter-reducing extrusion ■ Improved Precision and Cleanliness: Non-cutting of the inner diameter through small-diameter deep hole penetration ■ Novelty: Elimination of punching in the intermediate section of small-diameter deep holes *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a development case of near-net-shape manufacturing for injector components. In conventional products, processes such as cleaning, annealing, shot blasting, and oiling were performed in intermediate processing. The developed product implements flange forming without intermediate annealing, eliminating the intermediate processing. The cost of the developed product is 80% compared to 100% for the conventional product. Please feel free to contact us when you need our services. 【Development Objectives】 ■ New Method: Through-hole for small diameter deep holes (without annealing) ■ Improved Yield: Elimination of external diameter cutting due to increased forging precision ■ Novelty: Flange forming without intermediate annealing *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a case study on the development of cold forging net shape manufacturing. In conventional products, machining was used, but the developed product utilizes a combination of cold forging and machining, resulting in a material yield of 80% compared to 14% for conventional products. Additionally, it achieves an industry-leading L/D ratio of approximately 7 times. Please feel free to contact us when you need assistance. [Development Objectives] ■ New Method: Through-hole for small diameter deep holes ■ Improved Material Yield: No machining for inner diameter through-holes ■ Novelty: L/D ratio of approximately 7 times (industry-leading level) *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a case study on the development of cold forging for inner diameter net shape. In conventional products, we relied on cutting processes, but the developed product implements cold forging plus cutting (for the outer diameter). The material yield improved from 26% for conventional products to 80% for the developed product. Please feel free to contact us when you need our services. 【Development Objectives】 ■ New Method: Cold forging for the cutting process ■ Improved Material Yield: Elimination of cutting for inner diameters due to enhanced forging precision ■ Novelty: Ultra-precise cold forging (industry-leading level) *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a development case of press processing of machined products using a new layered processing method. In conventional products, sintering was performed followed by machining. The developed product implements layered processing using a progressive die, with forming done within the press. Additionally, the cost of the developed product is 60 compared to 100 for the conventional product. Please feel free to contact us when you need assistance. [Development Objectives] ■ New Method: Layered Processing (Forming within the press) ■ Cost Reduction: Shortening of processes through a review of processing methods ■ Novelty: Elimination of machining *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a development case of the press processing of lithium-ion battery cover plates. In conventional products, safety valves were laser-welded to the cover plate body. The developed product implements the integrated molding of the safety valve and cover plate through press processing. Additionally, the cost of the developed product is 60 compared to 100 for the conventional product. Please feel free to contact us when you need assistance. 【Development Objectives】 ■ New Method: Combination of cold forging and press technology ■ Cost Reduction: Shortening of processes through a review of processing methods ■ Novelty: Integrated processing *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a development case of press forming of machined products using a new method of differential thickness molding. In conventional products, press processing and machining were performed. The developed product implements cold forging and drawing processes. By optimizing the process, we achieved "press forming of differential thickness cylinders." Additionally, the cost of the developed product is 40 compared to 100 for the conventional product. 【Development Objectives】 ■ New Method: Differential Thickness Molding ■ Cost Reduction: Shortening of processes through a review of processing methods ■ Novelty: Elimination of machining *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a case study on the development of press-formed cutting products. In the conventional product, bulging processing was performed on pipes (after cutting). The developed product underwent deep drawing processing using a transfer press. Additionally, the cost of the developed product is 75 compared to 100 for the conventional product. Please feel free to contact us when you need assistance. 【Development Objectives】 ■ New Method: Tensile and Compression Composite Molding ■ Cost Reduction: Shortening of processes through a review of processing methods ■ Novelty: Elimination of cutting *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce a case study on the development of an integrated diaphragm cover with a single drawing process. In conventional products, the pipe and cover were joined by brazing, but the developed product employs an integrated drawing process using a transfer press. Bending is performed after the drawing process. Additionally, the cost of the developed product is 70 compared to 100 for the conventional product. [Development Objectives] ■ New Method: Tensile and Compression Composite Molding ■ Cost Reduction: Lower processing costs by eliminating the brazing process ■ Novelty: Integrated drawing of the pipe and cover *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We conducted eco-friendly processing with near-net shape technology. Here, we will introduce the strengths of cold forging processing. For all-cut products, the processing time is 207 seconds per piece, and bar materials generate additional scrap at both ends. Processing of non-simple cylindrical shapes takes more time, and often, internal irregular shapes in small diameter holes cannot be processed. In the case of cold forging plus cutting finish products, the processing time is a total of 136.32 seconds per piece. Since we cut from coils, the amount of scrap relative to the number of pieces is minimal, and irregular shapes can be processed efficiently due to mold transfer. (Especially for the inner diameter section) 【Objectives】 ■ By shaping the product close to its final form through cold forging, we reduce the discharge of scrap and chips (resource conservation). ■ Only the necessary parts are machined or finished to meet the required precision. ■ The crystal structure of the material becomes denser through forging, improving toughness. ■ Fiber flow (forging flow lines) occurs, enhancing strength. *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We conducted energy-saving activities through the renewal of compressors as part of our carbon-neutral improvement efforts. To understand the capacity of the existing compressors, we installed a power logger and an air flow meter in the factory's air piping to measure the power consumption and air flow of the compressors, confirming their capacity. Subsequently, to ensure the necessary air flow and anticipate risks for future equipment expansions, we updated three new compressors, adding to one compressor manufactured in 2021, resulting in a total of four units, while the compressors manufactured between 2000 and 2006 were designated as idle equipment. [Overview] ■ Trends in power consumption and power consumption per product - Comparing the power consumption per product, we achieved a reduction of "0.97Wh/product," with a reduction rate of "13%." ■ Trends in annual production and power consumption per product - By updating the equipment, the air supply capacity of the compressors improved, leading to an expected reduction of 20.5% in power consumption per product. *For more details, please download the PDF or feel free to contact us.

• Water Hydraulic Equipment
• Hydraulic Equipment

We would like to introduce a case where we developed an automatic supply device for a single-action press machine in-house, achieving automation and labor reduction. Before the improvement, the process from workpiece extraction to workpiece discharge was performed manually, but after the improvement, the entire process was automated. Key points of the device include the automation of visual inspection using an AI image sensor (commercial product) and the adoption of a robotic cylinder to ensure high-precision transport capability. [Overview] ■ Objectives - Automation of manual and repetitive tasks - In-house production of automation devices ■ Effects: 92% reduction in man-hours, 25% reduction in device costs (compared to outsourcing estimates) *For more details, please download the PDF or feel free to contact us.

• Press Dies
• Sensors

We would like to introduce our company's "Pressing of Internal Diameter Grooving in Machined Products." By converting from a combination of pressing and cutting processes to solely pressing, we have achieved cost reduction through a change in manufacturing method. As a result, the development product has reduced costs to 60 compared to the conventional product's 100. Please feel free to contact us if you have any inquiries. 【Overview】 ■Objective: Cost reduction through a change in manufacturing method (Pressing + Cutting → Pressing) ■Effect: Cost reduction from 100 for conventional products to 60 for development products *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We have developed a new joining method for dissimilar metal bonding using plastic processing. The joining with the new method reduces costs. It contributes to the reduction of CO2 emissions through scrap recycling. Since processing is done individually, it allows for the combination of upper and lower workpieces of different shapes. Both sheet and rod materials can be joined. Please consult us regarding the feasibility of processing. [Objective] ■ Contributing to cost reduction and CO2 emission reduction through method transformation ■ Dissimilar metal bonding through cold forging *For more details, please download the PDF or feel free to contact us.

• Processing Contract

The document is a booklet titled "Press Technology December Issue," featuring a special article about Miyama Seiko Co., Ltd. It introduces our core technology of deep drawing, a major overhaul after 45 years, and a three-month secondment to AIDA's factory. In addition to our three domestic factories, our press line at the Thailand factory has also started full-scale operations. The globalization of our production system is progressing. [Contents (partial)] ■ Core technology is deep drawing ■ Major overhaul after 45 years ■ Achievements in laminated processing and differential pressure processing ■ Three-month secondment to AIDA's factory ■ Full-scale press processing in Thailand *For more details, please download the PDF or feel free to contact us.

• Other processing machines
• Processing Contract

Miyama Seiko Co., Ltd. conducts process design, mold design, manufacturing, prototyping, and mass production of metal parts for automobiles in an integrated system. We produce and develop secondary processed products such as mold manufacturing equipment (design and assembly are done in-house), transfer press processed products, precision progressive press, and precision cold forging and machining. We possess multiple processing methods, including precision progressive pressing and cold forging, allowing us to select the optimal method according to product shape and production volume! We also support efficient and high-quality product development from the design stage. In our catalog download, we are offering technical materials related to "press technology"! [Excerpt of contents] - A processing method for forming a thin metal plate into a tubular shape → Parts used in automotive injectors, fuel pumps, exhaust gas recirculation devices, throttles, etc. - Achieving high precision with an inner diameter tolerance of 2/100 to 5/100 millimeters - Technical information on laminated processed products - Sheet forging technology related to lithium-ion battery parts and transmission parts *For more details, please download the PDF or feel free to contact us.

• Press Dies
• Casting Machine
• Processing Contract

In this document, we introduce Miyama Seiko Co., Ltd.'s "Press Technology." We cover the use of simulation software, efforts in automation, IoT, and digitalization, as well as information on our in-house automatic equipment and various technical details. Our company is capable of providing comprehensive support from process design, mold design, mold manufacturing, prototyping, to mass production. Utilizing the know-how we have cultivated over many years, we deliver products with reliable and stable quality. [Contents (partial)] ■ Mold manufacturing ■ Proposal capabilities, design capabilities, know-how ■ Use of simulation software ■ Efforts in automation, IoT, and digitalization ■ Equipment introduction of in-house automatic devices *For more details, please download the PDF or feel free to contact us.

• Press Dies
• Processing Contract

Miyama Seiko Co., Ltd. conducts process design, mold design, manufacturing, prototyping, and mass production of metal parts for automobiles in a consistent system. We produce and develop transfer press processed products, precision progressive presses, precision cold forging, and secondary processed products, starting with mold manufacturing equipment (design and assembly are done in-house). In addition to our headquarters factory and Toyota factory, we also have a base in Thailand. Please feel free to contact us when you need our services. 【Business Contents】 ■ Process design, mold design and manufacturing ■ Consistent system for prototyping and mass production *For more details, please download the PDF or feel free to contact us.

• Press Dies
• Casting Machine
• Processing Contract

Precision cold forging is a processing method that applies force to metal at room temperature to deform it and create various shapes. Hot forging results in significant dimensional changes and a rough surface, necessitating surface finishing in subsequent processes. In contrast, cold forging achieves precise shapes and has the advantage of not requiring surface finishing. Our company specializes in shapes with long, narrow holes and can handle special materials that require high hardness and are difficult to process, such as stainless steel, ferritic, and martensitic materials. 【Features of Precision Cold Forging】 ■ A processing method that applies force to metal at room temperature to deform it and create various shapes ■ Achieves precise shapes without the need for surface finishing ■ Does not produce cutting scrap, leading to cost reduction and reduced environmental impact *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

We would like to introduce a development case of burr-free processing of fuel injector parts using precision cold forging. The aim of the development is to achieve penetration of fine deep holes through diameter reduction extrusion, eliminate cutting for the inner diameter of fine deep holes, and abolish punching in the middle section of fine deep holes. Additionally, our company specializes in creating long, thin hole shapes and can handle special materials that require hardness and are difficult to process, such as stainless steel, ferritic, and martensitic materials. [Development Aims] - New Method: Penetration of fine deep holes through diameter reduction extrusion - Improved Accuracy and Cleanliness: Elimination of cutting for the inner diameter of fine deep holes - Novelty: Abolition of punching in the middle section of fine deep holes *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

We would like to introduce a development case of cold forging of the difficult-to-process material SUS440C using precision cold forging. Even if there were ideas for performance improvement in customer products, it was difficult to realize them due to the complex shapes and challenges in machining. We developed products with hole diameter tolerance of ±0.015, coaxiality of Φ0.02, and roundness of 0.01 to 0.015, contributing to our customer's T company receiving a technology development award. [Development Objectives] ■ New Method: Cold forging of axially asymmetric complex shapes ■ Improvement in New Product Performance: World-class No. 1 performance for fuel injection systems ■ Novelty: Cold forging of martensitic stainless steel *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

We would like to introduce a development case of cold forging of fuel injector parts using precision cold forging (complex-shaped products). The aim of the development is the application of a through-hole method for small-diameter deep holes, reduction of cutting sections through the penetration of small-diameter deep holes, and cold forging of cylindrical products with hollow shafts. Additionally, our company specializes in creating shapes with long, thin holes and can handle special materials that require hardness and are difficult to process, including stainless steel, ferritic, and martensitic materials. [Development Objectives] - New Method: Application of the through-hole method for small-diameter deep holes - Yield Improvement: Reduction of cutting sections through the penetration of small-diameter deep holes - Novelty: Cold forging of cylindrical products with hollow shafts *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

Drawing processing is a method of shaping a single thin metal sheet into a tubular form. Compared to cutting processes, it minimizes material waste, reduces costs, and leaves no chips or shavings, resulting in fewer defective products. Our company specializes in sizes that fit in the palm of your hand, and with processing of up to 16 stages, we excel in multi-stage drawing and ultra-deep drawing. Additionally, we can now form thin tubes that were traditionally brazed into a single piece, contributing to cost reduction. 【Features of Drawing Processing】 - A method of shaping a single thin metal sheet into a tubular form - Minimizes material waste and reduces costs - Leaves no chips or shavings, resulting in fewer defective products *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

We would like to introduce a case study on the development of an integrated drawing of a diaphragm cover through drawing processing. The aim of the development was to reduce processing costs by eliminating the brazing process through tensile-compression composite molding and to achieve an integrated drawing of the pipe and cover. We performed the integrated drawing processing using a transfer press, followed by bending after the drawing process. Additionally, our company specializes in palm-sized products and is proficient in multi-stage processing with up to 16 stages, including multi-stage drawing and ultra-deep drawing. [Development Objectives] ■ New Method: Tensile-Compression Composite Molding ■ Cost Reduction: Lower processing costs by eliminating the brazing process ■ Novelty: Integrated drawing of the pipe and cover *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

We would like to introduce a development case of press forming of machined products through drawing processing. The development focused on aspects such as tensile-compression composite molding, process shortening through a review of processing methods, and non-cutting. Deep drawing processing was performed using a transfer press. Additionally, our company manufactures parts such as automotive injectors, fuel pumps, EGRs, and throttles, achieving high precision with inner diameter tolerances of 0.03 to 0.05 millimeters. [Development Objectives] ■ New Method: Tensile-Compression Composite Molding ■ Cost Reduction: Process Shortening through Review of Processing Methods ■ Novelty: Non-Cutting *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

The electromagnetic steel sheets used for winding coils were traditionally processed by sintering iron and then machining it. However, this process has been replaced by stacking thin metal sheets and forming them through clinching in a progressive die, which is known as laminated processing. By eliminating machining, costs are reduced by 40%. The laminated structure makes it easier to create magnetic fields, allowing for the production of higher-performance motors. Additionally, it is possible to stack insulators between each metal sheet. We can accommodate requests for shapes and the number of layers, achieving high precision. 【Features of Laminated Processing】 ■ Stacking thin metal sheets and forming them through clinching in a progressive die ■ Reducing costs by 40% by eliminating machining ■ Making it easier to create magnetic fields ■ Possibility of stacking insulators between each metal sheet *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

We would like to introduce a development case of press forming of machined parts through layered processing. The development focused on aspects such as rivet forming within the press, process shortening through a review of processing methods, and eliminating cutting. Layered processing was carried out using progressive dies. Our company can accommodate requests regarding shape and number of layers, and we can achieve high precision. [Development Objectives] ■ New Method: Layered Processing (Rivet forming within the press) ■ Cost Reduction: Process shortening through a review of processing methods ■ Novelty: Elimination of cutting *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

Differential thickness processing is a method that changes the thickness of a part of a component that has been press-formed. By achieving different wall thicknesses through integrated molding, which was traditionally done through cutting processes, we have successfully reduced costs. This method is used in applications such as sealing plates for mobile lithium batteries and solenoid components for transmissions. At our company, we have simplified the process and successfully reduced costs by integrally molding the explosion-proof valve of the sealing plate for mobile lithium-ion batteries. 【Features of Differential Thickness Processing】 ■ A method that changes the thickness of a part of a component that has been press-formed ■ Successful cost reduction by achieving different wall thicknesses through integrated molding ■ Adopted for sealing plates for mobile lithium batteries and solenoid components for transmissions *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

We would like to introduce a development case of press forming of machined products through differential thickness processing. The aim of the development is to shorten the process and eliminate cutting by reviewing the differential thickness forming and processing methods. We have achieved the "press forming of differential thickness cylinders" through process optimization. Please feel free to contact us when you need assistance. [Development Goals] ■ New Method: Differential Thickness Forming ■ Cost Reduction: Process Shortening through Method Review ■ Novelty: Elimination of Cutting *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

We would like to introduce a development case of press forming for lithium-ion battery cover plates through differential thick processing. The development focused on the integration of cold forging and pressing technology, process shortening through a review of processing methods, and integral processing. The safety valve and cover plate were formed as a single piece through pressing. Please feel free to contact us if you have any inquiries. 【Development Objectives】 ■ New Method: Integration of cold forging and pressing technology ■ Cost Reduction: Process shortening through a review of processing methods ■ Novelty: Integral processing *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

Our company is capable of not only cold forging and deep drawing processing but also consistent execution of subsequent processes such as machining and assembly. Forging + secondary processing / After cold forging the main body of the fuel flow pipe for injectors, we perform machining on the outer diameter and tip, removing any scratches or defects on the outer diameter, thus responding to various product processing requests. Please feel free to contact us when you have inquiries. [Responding to such requests] ■ Assembly / Using a production line that combines assembly and press processing machines, we perform assembly processing for products like hose clamps and finish them as completed products. ■ Forging + secondary processing / After cold forging the main body of the fuel flow pipe for injectors, we perform machining on the outer diameter and tip, removing any scratches or defects on the outer diameter. ■ Multi-forming / Magnetic circuit components (yokes) for accelerator pedal modules are manufactured by processing simultaneously from multiple directions, and we can accommodate various methods in metal processing. *For more details, please refer to the related links or feel free to contact us.

• Processing Contract

Automotive small motor parts, magnet parts, etc.

• Other Auto Parts

This is an announcement from Miyama Seiko Co., Ltd. regarding "uneven thickness molding."

• Other machine elements

Automotive carburetor parts, throttle body parts, and others.

• Other Auto Parts

For precision horizontal twisting processing, please leave it to Miyama Seiko Co., Ltd.

• Other machine elements

Automotive fuel injection-related parts and other automotive-related parts.

• Other Auto Parts