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Process Flow and Production Equipment

1. Raw Material Selection

2. Saw Cutting

3. Forming

5. Heat Treatment

6. Mechanical Property Test

8. Machining

8. Machining

9. Magnetic Particle Inspection

11. Hydrostatic Test

1. Raw Material Selection

2. Saw Cutting

3. Forming
The two openings of the shell are heated up to as high as 1250°C, and then they are processed into closed shape with the help of a CNC hot spinning lathe. This hot spinning lathe is characterized by fast processing speed with excellent precision and high pass rate, thus greatly improving our production capacity and product quality.

4. Spherical Grinding

5. Heat Treatment
The high temperature electric heating furnace is a very important device when manufacturing accumulator shells. The accumulator shell is placed inside this equipment to be heated up to 900°C, and its mechanical properties, especially the impact resistance, stretchability and hardness will be enhanced to a large extent after quenching, tempering and other treatments. So, the accumulator will work in a safer and more reliable way.

6. Mechanical Property Test

7. Sandblasting

8. Machining
Machining is of great significance for the entire production flow because the gas port and the fluid port of an accumulator are both fabricated during this process. An automatic CNC lathe is responsible for this step, and it shows some outstanding features. For example, it realizes multi-coordinate simultaneous motion control which makes it be able to process complex-shaped components, and the processing error is quite small. For components in different sizes, the operator just needs to change the CNC program, thus saving a lot of preparation time. Moreover, this lathe shows good precision and high rigidity, and its productivity is 3-5 times when compared with common type.

9. Magnetic Particle Inspection

10. Dimension and Appearance Inspection

11. Hydrostatic Test
The hydrostatic test is the last but the most important production test when manufacturing accumulators. A pressurization device is used to increase the hydraulic pressure inside the shell to 1.5-2 times of design valve to check if leakage occurs under this high pressure, whether the gas port and fluid port are well sealed, etc. After shells pass this test, they could be used to assemble accumulators.

12. Phosphating

13. Painting