1.Features for leaf spring:

2. Leaf spring manufacturing process:

 1.Shearing of flat bar

 2.Center hole punching

 3.End heating process forming

4. Heat treatment:

     a. heating

       b. camber forming

       c. quenching

       d. tempering

5. Surface preparation:

    a. shot penning / stress peening

       b. painting

6. Eye bush preparation process:

    a. Eye reaming / eye boring

       b. Bush insertion / bush reaming

 7. Assemble:

    a. Presetting & load testing

       b. Paint touch-up

       c. Marking &packing

We can also provide more trailer parts ,such as trailer axle, suspention,leaf spring ,brake chamber,king pin fifth wheel,

landing gear and so on.

Our company’s advantages:

1 OEM manufacture in semi trailer parts

2 Can be customized

3 ISO9001:2000 certificate

4 steady and large supply

5 reasonable and competitive price

6 efficient and professional service on export trade 

Company Brief Introduction:

Shandong Liangshan Zhengyang Trailer Parts CO.,LTD is a professional manufacture

in semi-trailer parts,located in the famous trailer base—Liangshan,Jining,Shandong province. 8000 square meters workshop, over 200 professional workers,ISO9001:

2000 certificate in product quality, neary 10 years’ experiences in producing

semi trailer parts, enjoying high reputation,I’m sure we could serve you well.

Exhibition:

                  OEM qusemi trailer truck parts

                         American/German type 

                  Axle suspenion manufacture

                        Welcome to our company.