Production process of excavator bulldozers sprocket segment
Jan 23,2026
The production process of excavator chassis component gear blocks (usually referring to drive gear rings/segments) is a complex metalworking process, mainly including the following core steps:
1. Material Selection and Cutting:
High-strength alloy steel (such as 35MnB, 40Cr, or 45# steel) is typically used. First, according to specifications, the steel raw material is cut into blanks suitable for forging.
2. Forging:
After heating the blank to a high temperature, it is forged using a large press with precision dies. This step refines the metal grains, improving the impact toughness and structural strength of the gear block.
3. Normalizing/Annealing:
The forged blank needs to undergo heat treatment to eliminate internal stress and adjust hardness for subsequent machining.
4. Machining:
Precision machining is performed using CNC machine tools, including milling the tooth profile, drilling mounting holes, and finishing the contact surfaces to ensure dimensional accuracy meets assembly standards.
5. Surface Hardening:
This is a critical step. The surface of the tooth block is typically treated with induction hardening to improve the wear resistance of the teeth, while maintaining good toughness internally to prevent fracture.
6. Tempering: After quenching, low-temperature tempering is performed to stabilize the microstructure and further eliminate heat treatment stress, preventing cracks from forming during use.
7. Shot Blasting and Coating: The surface of the tooth block is shot-blasted or sandblasted to remove oxide scale, followed by spraying with anti-rust paint (usually yellow or black).
8. Quality Inspection: Hardness testing (HRC), flaw detection, and dimensional measurements are performed to ensure that each product can withstand harsh working environments.
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