都筑製作所 List of Products and Services

Tsuzuki Manufacturing is a company that actively engages in the production of hollow shafts and axles, incorporating the forging technology 'Radial Forging,' which enables the shaping of complex inner diameter shapes through hammering and positional control. It allows for simultaneous processing of inner and outer diameters, and multi-stage shafts can be formed in a single process. In addition to contributing to product lightweighting, high strength, and cost reduction, it is also possible to add functional features through hollowing. The company is active in a wide range of fields, including automotive parts and aerospace. 【Features】 ■ Lightweight, low-cost, and high-strength shafts ■ Capability to add functions to inner surfaces ■ Compatible with hot, warm, and cold processing ■ Processing possible under conditions suited to requirements ■ Achieves inner diameter shapes that are impossible with cutting processes We offer materials summarizing examples of Radial Forging processing. *For more details, please download the materials or contact us.

• Processing Contract

This article introduces the differences between swaging and radial forging. Swaging is a processing method that reduces round bars or circular tubes to a desired diameter, also known as rotary cold forging. Radial forging is a processing method that applies force from the radial direction of a hollow shaft using a hammer (die) to induce plastic deformation. Tsuzuki Seisakusho has introduced radial forging equipment to address customer challenges. **Features of Radial Forging** - Forging is possible even for thick-walled shafts or shaft shapes with flanges. - Partial warm processing allows for increasing thickness (upsetting) only at the ends. - Cold forging is possible for areas requiring precision, such as inner diameter splines. - There is no need to arrange multiple machines as with swaging. - Setup time is minimal, and it can accommodate multiple models. *For more details, please refer to the related links or feel free to contact us.*

• Processing Contract

This article introduces "Processing techniques applicable to the inner diameter of hollow shafts." It includes examples of radial forging for spline processing, serration processing, inner diameter oil grooves, oil reservoirs, keyways, and the "shape transfer" of shaft inner diameters. We will present the transfer methods for each example and the advantages of shape transfer to the shaft inner diameter using radial forging. For more details, please refer to the related links. [Content included (partial)] ■ Inner diameter processing by radial forging ■ Examples of "shape transfer" to shaft inner diameters by radial forging ■ Applications of "shape transfer processing to shaft inner diameters by radial forging" *For detailed content of the article, please refer to the related links. Feel free to contact us for more information.

• Processing Contract

Tsuzuki Manufacturing is a processing manufacturer specializing in the production of automotive suspension components. In line with the recent trend towards electric vehicles (EVs), we have been receiving a significant number of inquiries regarding rotor shafts. In this article, we will introduce radial forging, focusing on hollow shafts under the theme of "Proposals for Shafts Towards Electrification." For more details, please refer to the related links. [Contents (partial)] ■ Advantages of Hollow Shafts ■ Processing Methods for Hollow Shafts ■ New Processing Technology for Hollow Shafts: Radial Forging ■ Processing Methods for Radial Forging ■ Processing Accuracy of Radial Forging *For detailed information, please refer to the related links. Feel free to contact us for more information.

• Processing Contract

This article introduces the vehicle-mounted motor generator shaft (solid shaft) with the theme of "Proposals for Shafts Towards Electrification." A solid shaft refers to a shaft that has been processed from a solid material. Our company refers to it as a solid shaft to distinguish it from a hollow shaft. For more details, please refer to the related links. [Contents] ■ Types of vehicle-mounted motor generator shafts manufactured by Tsuzuki Seisakusho ■ Required performance for vehicle-mounted motor generator shafts ■ Materials for vehicle-mounted motor generator shafts ■ Material composition of vehicle-mounted motor generator shafts ■ Processing methods for vehicle-mounted motor generator shafts ■ Capable of processing rotor shafts and assembling necessary components *For detailed information, please refer to the related links. For further inquiries, feel free to contact us.

• Processing Contract

In this article, we will introduce the "shaft processing technology proposal for electrification," featuring the magnet-integrated shaft. The magnet-integrated shaft "MIRS" incorporates a magnet inside the shaft, allowing it to function as a rotor. Our company has developed numerous shafts that incorporate magnets used in electric turbos and motors for cooling FC stacks. For more details, please refer to the related links. [Contents] - Proposal for the magnet-integrated shaft "MIRS" - Components of the magnet-integrated shaft "MIRS" - For those looking for manufacturers of rotor shafts *For detailed information, please refer to the related links. Feel free to contact us for more information.

• Processing Contract

Recently, in order to reduce CO2 emissions, various automobile manufacturers are promoting the shift away from engines, and it is expected that the necessity for motors as a new power source will increase in the future. Our company has been involved in the prototyping and mass production of rotor shafts used in various motors. Typical motors required for EV systems include drive motors, coolant circulation motors, and air compression motors, among others. For more details, please refer to the related links. [Contents] - Proposals for processing technology of rotor shafts for EVs from the perspective of a machining manufacturer - Production achievements of Tsuzuki Seisakusho's rotor shafts used in various motors - Types and characteristics of rotor shafts - Structure of the magnet-integrated shaft 'MIRS' that realizes ultra-high-speed motors - Manufacturing methods for rotor shafts at Tsuzuki Seisakusho (typical manufacturing processes) - For those looking for a manufacturer of rotor shafts *Detailed content of the article can be viewed from the related links. For more information, please feel free to contact us.

• Processing Contract

"Radial Forging" is a forging processing technology that allows for the shaping of complex inner diameters by controlling the position of the inner diameter core and hammering the outer diameter of cylindrical components such as hollow shafts. It enables multi-stage processing in a single operation, contributing to product lightweighting, high strength, and cost reduction. Additionally, hollowing out allows for the incorporation of added functions such as internal cooling. It can be processed under conditions suitable for deformation amounts and specifications, accommodating hot, warm, and cold processing. It is applicable to various cylindrical components, including rotor shafts. [Features] - Multi-stage shapes can be formed in a single operation through NC control of the hammer. - Simultaneous forming of inner and outer diameters is possible. - High precision and low scale are achieved through warm forging. - Capable of handling small lot sizes and short delivery times. *For more details, please refer to the materials or related links. Feel free to contact us with any inquiries.

• Processing Contract

We are a processing manufacturer specializing in the production of automotive suspension components. In line with the recent trend towards electric vehicles (EVs), we have been receiving a significant number of inquiries regarding shafts. If your company is facing challenges such as "I want to reduce the weight of the shaft," "I want to integrate a magnet into the shaft," or "I want to convert a two-piece design into a one-piece design," please feel free to contact us. 【Flow】 ■ Request ■ Issue extraction and response method development ■ Trial feasibility confirmation ■ Reporting results and proposal for refinement *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing
• Prototype Services

Our company has been working on the aerospace and defense industry since 2016, aiming for business expansion and further deepening of processing technology. In 2017, we obtained the JISQ9100 quality certification for the aerospace industry. Since 2019, we have been receiving mass production orders for engine parts for commercial aircraft. We can respond to aerospace defense parts from the prototype processing stage. Please feel free to contact us, including for ultra-high precision processing and difficult-to-cut materials/special materials. 【Features】 ■ Capable of handling various materials and precision from machining to molded materials ■ In-house support for regrinding, modification, and manufacturing with new equipment and skilled technology ■ High-precision shaping of hard materials such as carbide and brittle materials like magnets ■ Capable of grinding three-dimensional shapes ■ Simultaneous grinding of magnets with different hardness and difficult-to-cut materials, as well as press-fitting treatment of brittle materials into the outer cylinder of magnets is also possible *For more details, please refer to the PDF document or feel free to contact us.

• Prototype Services

"Radial Forging" is a forging machine that applies force from the radial direction of the shaft using a hammer (die) to achieve plastic deformation. By inserting a core and transferring the inner diameter shape, it is possible to form both the inner and outer diameters simultaneously. Additionally, since it can perform hot and warm processing, it is capable of machining shapes with thick shafts or flanges. 【Features】 ■ Compatible with "hot, warm, and cold" processing, allowing for machining under conditions suitable for deformation amounts and specifications. ■ NC control of the hammer enables the formation of multi-stage shapes with a single chuck. ■ By controlling the position of the hammering from the outside and the inner diameter core (mandrel), it achieves inner diameter shapes that are impossible with cutting processes. *For more details, please download the PDF or feel free to contact us.

• Other Auto Parts

Tsuzuki Manufacturing Co., Ltd. supports over 1,000 types of products primarily focused on automotive parts, motorcycle parts, outboard motor parts, and various hydraulic equipment for construction machinery. With more than 20 automated mass production lines that combine skilled production technology and advanced processing equipment, we produce 10,000 products per day. Our product precision is achieved at the μ level (0.001mm) through high-precision processing equipment and skilled technicians. We guarantee high quality through reliable product inspections at each stage of the process. 【Features】 ■ Produces 10,000 products per day ■ Supports over 1,000 types of products ■ Product precision of 0.001mm *For more details, please request materials or view the PDF data from the download section.

• Transmission parts