Features for leaf spring                                                                           

  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

Picture Show                                                                                             

Recommend Products                                                                              

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 Zhengyang Machinery 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:                                                                                                

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