Three-Axle Flatbed Semi-Trailer

Before production, the technical department should first design and produce drawings according to the needs of users and the market, the design specifications of the drawings should match the technical parameters when signing the contract, and the drawings are completed and then transferred to the production department.

The production department cuts, welds, strengthens, assembles and tests the steel according to the details of the drawings. Finally, the quality of the product is satisfied after the customer's inspection. The specific production process is as follows;

1. Steel plate material cutting stage:

According to the drawings of each part produced by the design department, each part is cut out with the CNC underwater cutting machine, such as the beam web, the reinforcing plate, and the standard small accessories

2. Fixed submerged arc welding beam and beam

In the second step, the cut web and upper and lower wings are fixed to the solder joints, and then the beam is welded with submerged arc welding.

3. Laser calibration, laser beam

First cut out the web of the beam, cut out the U-shaped hole through which the beam can pass, and then fix the welded I-beam in parallel. It is important to compare the results of the beams. If the parallel error of the two I-beams is large, there will be very serious tire wear.

4. Connect the side beam and weld the kingpin

At this time, the main beam of the low plate semi-trailer is basically formed, and only the side beam is welded to form the frame structure. And the traction pin traction plate is welded to the position required by the contract, and the welding process requires high requirements, otherwise the low chassis truck trailer will skew.

5. Welding frame, welding suspension

At this time, the welding suspension must strictly control the size and maintain the verticality, otherwise it will cause tire wear.

6. Connect the gooseneck

This process is to complete the welding of the gooseneck and chassis structure of the low plate semi-trailer, and the accuracy of the welding is very important, because the Angle deviation of the traction pin will affect the use of the semi-trailer, especially in the later use, and the wrong welding will cause the tire wear of the trailer.

7. Lay the bottom plate

The steel plate that is at least greater than 3mm is laid on the bearing platform of the low plate semi-trailer, the welding process should pay attention to the welding seam of the frame structure, at the same time for different cargo transportation, the steel plate laid is also different, the common bottom plate should be patterned steel plate, strong friction, the stability of the transport of goods will be improved.

Product Parameter (Specification)

description of products

Low plate semi-hanging: suitable for a variety of mechanical equipment, large objects, highway construction equipment, large tanks, super high containers and all kinds of steel transportation, wide range of uses, efficient and fast. The suspension system with leaf spring under U-shaped leaf spring base developed by ourselves is proposed to improve the strength and passability of vehicle longitudinal beam and reduce the height of load surface effectively. The company's models are complete, the design is flexible and diverse, can design the frame bearing surface according to the needs of users, to meet the transportation of various special goods, low plate is the preferred model for domestic large transport customers.

Product Feature And Application

The low flat semi-trailer has flat type, concave beam type and tire exposed type structure, and the longitudinal beam adopts flat type or gooseneck type. Its frame is ladder type, longitudinal beam section is I-shaped, with high stiffness, high strength characteristics. The main plane of the frame cargo platform is low, which ensures the smoothness of transportation and is suitable for carrying all kinds of construction machinery, large equipment and steel。

The support device of the semi-trailer is mainly used to support the trailer when unhanging, and is composed of legs, connecting brackets, etc. Many brands, York, Pasmark, Fuhua, Jost and so on are very good legs, generally not bad!

The ladder can directly form a small Angle ramp with the ground, and then can directly form a rigid support with the ground, and the heavy machinery equipment with its own power can move directly from the front of the trailer to the trailer, and the loading and unloading is relatively faster and safer. For excavators, bulldozers and other heavy machinery, such trailers are a more ideal choice.

The most commonly used three-axle low plate semitrailers are 11.00R20 steel wire tires and 12.00R22.5 vacuum tires. Among them, the long-distance road condition is good with 12.00R22.5 vacuum tires, and the pattern is mostly 3 or 4 lines.

Poor road conditions, short distance can be equipped with 11.00R20 steel wire tires or 12.00R22.5 block flowers series of vacuum tires can also be, at present to meet the announcement of 12R22.5, 12-layer vacuum tires, but the actual application to 16 layers, 18 vacuum tires, tire level is about high, the higher the durability coefficient, so the greater the safety factor.