Quality control

Production process

Production Process Introduction

01 Material

Raw materials are the premise of product quality assurance. The raw materials of our products are selected from domestic large enterprises such as Baotou Steel, TISCO, Qingshan, etc. Strict incoming inspection and material traceability are your product guarantee

02 Forging

We have Friction press machine, rolling machine, and traditional free forging hammer, we can make many kinds of different types of forgings, and we have the best delivery time to satisfy the customers.

Friction press machine, it fast speed than traditional free hammer and air hammer, and precisely dimension for mass production

Ring rolling, It can roll all the rings, discs with very fast speed and even save the material, and also make our prices to be competitive.

Free forging hammer, no size and shape limited and flexible forging for different size and small batch quantity production.

03 Heating and heat-treatment

We use the gas heating equipment to heat the forging discs, and we keep checking the temperature during this, to make sure it will reach the correct temperature for forging part.

And the heat treatment will be performed accordingly to standard before machining.

04 Machining

We use all CNC machining to keep the surface and finish of flanges is good, as well as the dimensions. We also use the CNC drilling machines in order to make sure the inside of the bolt holes are smooth and the diameter of the bolts are good.

05 Protection of rust

After machining flanges, we will protect them by using light oil, black painting, yellow painting, and hot deep galvanized, Nitrous acid.
Light oil: easy and normal.
Painting: Black and yellow, blue or others according to form the layer of zinc plating, making it more anticorrosion, and beautiful.
Galvanized (Hot-Dip Galv.): Through the hot dipped galvanization on the product surface to form the layer of zinc plating, making it more anticorrosion, and beautiful.
Nitrous acid: Not very popular, it can only protect for one-two weeks, especially for the customers’ request.

06 Packing

We use the plywood plates in the cases to protect each floor of the flanges. And our cases are improved and strong enough for handling and transportation.

The good faith is practical

Shanxi Liangpin Forging Co., Ltd

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