A Brief Analysis of Typical Applications of Cold Extrusion Hydraulic Presses in Automobile Manufacturing

Today, we will detail some typical applications of cold extrusion hydraulic presses in automobile manufacturing. These parts typically possess characteristics of "axisymmetric design, mass production, and high strength requirements," which cold extrusion technology can perfectly meet. Below, we share insights from Jianlong Hydraulic Technology.

1. Powertrain System

This is the most widespread and classic application area of cold extrusion technology.

1.1 Engine Components

■  Piston Pin: A typical cup-shaped part, a benchmark product of cold extrusion. Requires extremely high strength and wear resistance.

■  Valve Tappet/Pushrod: A slender cup-shaped part, requiring good straightness and surface finish.

■  Rocker Arm: Relatively complex structure, near-net-shape forming is achieved through cold extrusion, reducing subsequent processing.

■  Engine Connecting Rod: Requires extremely high fatigue strength; cold extrusion can create metal flow lines beneficial to strength.

1.2 Gearbox Components

■  Input/Output Shafts: Solid or hollow long shafts. Cold extrusion can form some splines and steps in one step, with efficiency far exceeding that of machining.

■  Gears/Synchronizer Rings: Especially smaller spur gears. Cold extrusion can directly extrude the tooth profile, resulting in a complete metal flow line, high strength, and low noise.

■  Synchronizer Rings/Locking Rings: With internal conical surfaces and external teeth, this is a classic application of cold extrusion.

2. Chassis and Transmission System

2.1 Driveshafts and Universal Joints

Constant Velocity Universal Joint Assembly: This is one of the most important applications in the chassis system. Includes:

■ Star-shaped sleeve

■ Three-post housing/outer housing

■ These parts have complex shapes, bear heavy loads, and have stringent requirements for precision and strength; cold extrusion is the preferred process.

2.2 Steering System

■  Steering Rack: Long rods with teeth, ideally suited for cold extrusion forming.

■ Tie Rod Joints: Ball joints, etc.

2.3 Wheel Hub and Braking System

■ Wheel hub bearing unit: Some flanges and raceways.

■  Pistons of the brake master cylinder and wheel cylinders: Typically cup-shaped parts, requiring dimensional stability and good sealing.

■  ABS system valve block: Contains precision channels and can be pre-formed by cold extrusion, reducing material waste and machining time.

3. Body and Auxiliary Systems

3.1 Door hinges

3.2 Key components in seat belt retractors (e.g., gears, shafts)

3.3 Some high-strength bolts and nuts for fixing

In summary, cold extrusion hydraulic presses are mainly used in automobile manufacturing to produce critical structural components with the highest requirements for safety, durability, and precision. It is not only about manufacturing parts, but also about "forging performance," and is one of the key manufacturing technologies for improving the overall quality and performance of automobiles. For more information/advice on cold extrusion hydraulic presses or to purchase other high-quality hydraulic presses, please contact us (or scan the WhatsApp QR code below). Jianlong Hydraulic Technology will provide you with personalized and customized professional solutions and is dedicated to serving you.