Precision Forging Dies Product Information

Creating the Future of Precision Forging Dies, Your Technology Partner

From the design and manufacturing of precision forging dies to proposing optimal manufacturing processes and supporting mass production, we provide comprehensive, end-to-end solutions. We support a wide range of forming methods, including cold, warm, and hot forging, sheet forging, and powder forming, to achieve the optimal forming process for each customer’s needs.

NICHIDAI’s die-making technology that supports forging technology

Dies are important elements that determine product quality and productivity in precision forging.
NICHIDAI supports establishment of stable mass production systems through die-making technology that achieves high-precision forming. It contributes to resolving issues in customers’ manufacturing sites, such as productivity improvement through process integration and reduction in material losses.

Near-net-shape technology

Cold forging is a metal forming process in which metal is shaped at room temperature. It offers the advantages of achieving both high dimensional accuracy and high strength. At NICHIDAI, we have made cold forging a core technology and leverage our expertise in precision cold forging dies to achieve Net-Shape production, minimizing the need for machining.
This contributes to efficient manufacturing with a lower environmental impact through the following benefits:

Reducing material losses
Reducing machining processes
Improving productivity

	Machining	Cold Forging (Net Shape)
Productivity	△	High processing speeds result in higher productivity.
Material Yield	△	High material yield.
Product Strength	△	Continuous metal grain flow and work hardening improve product strength.
Machining Accuracy	◎	High-precision net-shape production.

◎：Excellent　〇：Good　△：Relatively lower than the benchmark

Cold forging —NICHIDAI’s core technology—

Cold forging plays a central role in NICHIDAI’s precision forging technology. As cold forging imposes a very large load on dies during forming, it is essential for dies to have both high dimensional accuracy and durability. NICHIDAI supports stable supply of high-quality cold forgings using the design and manufacturing technologies that it has cultivated over many years.

	Cold forging	Warm Forging	Hot Forging	Powder Metallurgy (Sintering)
Features	Forging performed at room temperature or near-room temperature.	Forging performed after heating the material to a temperature below its recrystallization temperature.	Forging performed at temperatures above the recrystallization temperature.	A process in which metal powder is compacted in a die and sintered to form the final product.
Processing Temperature	Room Temperature	600℃~850℃	1100~1250°C	Sintering Temperature: Approx. 1,100–1,400°C (depending on the material)
Forming load	High	Medium	Low	Very low (during powder compression)
Dimensional Accuracy	◎	○	△	◎
Surface Condition	◎	○	△	○ ~◎

Strengths of NICHIDAI’s Die-making Technology

NICHIDAI’s die technology supporting precision forging is characterized by three key strengths: high precision, high complexity, and high strength. By integrating our design, simulation, and machining technologies accumulated over many years, we achieve stable forming even under demanding forging conditions. In doing so, we support our customers in achieving high-quality manufacturing.

High precision that achieves stable product quality

Quality of forged products is significantly influenced by die accuracy.
NICHIDAI achieves stable dimensional accuracy using high-precision design and processing technologies. It maintains high quality even in mass production processes and contributes to enhancing customers’ product values.

Die for double gears

R0.1 machining control for gear tooth tips using hard material (HAP10)

⇒R0.1 machining which was difficult for conventional electrical discharge machining has been achieved by direct milling.

High Complexity — Capable of Producing Complex Geometries —

Sophisticated processing technology is essential to handle product shapes that become more complicated.
NICHIDAI also handles highly complex-shaped die making using advanced equipment (such as 5-axis machining centers and electrical discharge machines) and advanced processing technology.

High helix angle helical gear

5-axis machining used for high helix angle helical gear electrodes
Lapping technology that leaves no missed spots
Lapping technology that maintains previous process data

Strength : High-strength dies that can withstand harsh forging conditions

A high load or wear load is imposed on dies during the forging process. NICHIDAI achieves high-durability dies by combining optimum material selection, design technology, and manufacturing technology.

Segmented carbide die

Irregular-shaped nib assembly
Die whose dimensions can be controlled during assembly
Uniform PVD coating layer

Optimum die design based on forming simulation

NICHIDAI utilizes its forging process CAE analysis software Simufact Forming to visualize forming behaviors (such as material flow, stress distribution, and temperature history) at the design stage.
By preliminarily predicting and analyzing loads and stress that occur during forming, NICHIDAI reduces risks of forming defects, improves die lifespans, and stabilizes quality. Moreover, NICHIDAI contributes to shortening development periods and reducing costs through consideration of optimum forming conditions and die structure.