Analysis of materials and process parameters for large crushers and medium and large hydraulic equipment

 

I. Parameters of components for large crushers

1. Specifications: 377/320

2. Inner diameter parameters: 320+5 wire

3. Materials and structures:

Customized seamless steel pipes: high strength and good sealing, suitable for high-pressure hydraulic systems or load-bearing components.

Hydraulic cylinders: As the cylinder body of the actuator of the hydraulic system, it needs to withstand the hydraulic oil pressure.

Customized flanges at both ends: used for component connection, the size and bolt hole position need to be customized according to installation requirements.

 

II. Parameters of components for medium and large hydraulics

1. Specifications: 351-280

2. Processing technology:

Finished product of rolling machine: directly formed by rolling process, no secondary cutting is required, high efficiency and good surface accuracy.

Inner hole process: rolling

Process advantages: rolling can improve the surface hardness and finish of the inner hole (Ra value is reduced), reduce friction loss, and enhance wear resistance.

3. Inner diameter parameter: 280+5 wire (280.05mm)

Precision requirements: Similar to large crushers, the inner diameter tolerance is strictly controlled to ensure that the hydraulic components fit tightly and avoid leakage.

 

III. Supplementary explanation of key terms

Seamless steel pipe:

Features: No welds, high compressive strength, suitable for high pressure and high load scenarios (such as hydraulic cylinders).

Customization points: It is necessary to select steel grades (such as 20#, 45# steel) according to the pressure level and control the uniformity of wall thickness.

Rolling process:

Principle: Apply pressure to the metal surface through the rolling tool to cause plastic deformation and optimize the surface microstructure.

Effect: The surface roughness Ra can reach less than 0.8μm, the hardness is increased by 15%-30%, and the service life of the components is extended.

Flange customization:

It is necessary to confirm the standard (such as national standard GB, American standard ANSI), pressure level, sealing surface form (flat, concave and convex surface, etc.) to ensure matching with other components.

 

IV. Application suggestions

If used for equipment customization, it is recommended to clarify with the supplier:

Material mechanical properties (tensile strength, yield strength);

Surface inspection report after rolling (roughness, hardness);

Flange connection dimension drawing to avoid installation errors.