A frame is a product, which could be called the truck’s skeleton, that supports the full weight of the vehicle, and is mainly made of parts pressed out of steel plates. There are wide varied specifications to respond to vehicle variations, with overall length of the short frame being approximately 4.5 m for light trucks and pickups, and the long frame being 12 m for heavy trucks.
Frames not only support cargo but have the functions of receiving the road load through a suspension, and being equipped with engine and drivetrain, such as a cab (driver’s seat), as well as accessories, such as a refrigeration unit and a mixer.
Furthermore, a wide range of matters are requested, such as ensuring rigidity to improve running stability and ride comfort, and weight reduction to increase cargo capacity.
①Stamping (cutting and piercing)
For side members, first the cutting and piercing are made using a steel plate with a maximum thickness of 10 mm and maximum length of 12 m that is processed using a NC-pierced machine or a cut-pierced die.
②Stamping (forming) / offset processing
After completing the cutting and piercing, for heavy and medium-duty trucks, the steel plate is pressed into a U-shape using one of the world's largest 5,000-ton presses. An offset bender helps to create a variety of side member shapes.
The left and right side members and multiple cross-members are assembled into a ladder structure and the components are fastened together, mainly using rivets and bolts.
The frame for light duty trucks is painted after assembly, the frame for medium and heavy duty trucks are painted as parts.
The surface of the steel plates can also be treated through blasting.
Rivet Frame for Heavy Duty Truck
Length=5.4-12.0m Wide=0.84-0.95m Mass=520-1,200kg
Rivet Frame for Medium Duty Truck
Length=5.1-11.6m Wide=0.85m Mass=240-700kg
Rivet Frame for Light Duty Truck
Length=4.4-6.7m Wide=0.70-0.85m Mass=130-350kg
Weld Frame for Pickup Truck & SUV
Length=4.5-5.1m Wide=1.0m Mass=200kg