Jining Shengshitong Machinery Co., Ltd.

+86 15376505089

components

Small excavator manufacturing technology and craftsmanship: Ingenious forging from precision to reliability

As a "flexible expert" in engineering construction, the performance, durability and operating experience of small excavators are underpinned by the meticulous refinement of manufacturing technologies and craftsmanship. From the precision machining of core components to the coordinated debugging of the entire machine, every process embodies the ultimate pursuit of "efficiency, reliability and durability", forming a composite manufacturing system that integrates mechanical processing, hydraulic control and intelligent integration.From millimeter-level machining precision to reliability verification through ten-thousand-time tests, the manufacturing process of small excavators is a perfect combination of "precision machinery" and "practical engineering". The roll-off of each piece of equipment is the collaborative achievement of materials science, mechanical engineering, and intelligent technology, and even more, it represents the unremitting pursuit of "making construction more efficient and usage more reassuring".

Production process

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welding

blueprint

packaging

installation

transport

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Core components: The cornerstone of performance

Engine: The high-strength alloy cylinder block undergoes precision casting (with a tolerance of±0.02mm). The honing process enhances sealing performance, and cold-heat shock tests ensure stable operation in extreme environments.
Hydraulic system: The pump body is forged in one piece, with the clearance between the plunger and cylinder block controlled within 0.005-0.01mm; the high-pressure oil pipe can withstand 35MPa, laser welding guarantees sealing, and the nitriding treatment on the valve core increases wear resistance by 50%.
Structural components: The boom and bucket are made of high-strength steel, welded by robots (with weld strength reaching 90% of the base material), and stress-relief annealing is applied to prevent cracking; the chassis has passed a 1000-hour salt spray test, making it suitable for harsh environments.

Overall assembly and debugging: The key to synergy

A flexible assembly line is adopted, dividing the entire machineintopreassembly units such as the power module, hydraulic module, and chassis module. Each unit is calibrated by a dedicated person to reduce the accumulation of assembly errors; key connection parts (such as the hinge point between the boom and the turntable) use liquid nitrogen cold fitting technology to ensure the interference fit accuracy between the pin shaft and the hole, thereby reducing the risk of loosening in the later stage.
An error-proofing system is introduced during the assembly process: component models are identified by scanning codes. If misassembly or missing assembly occurs, the system will immediately alarm and lock the process, preventing unqualified products from flowing into the next link. The assembly qualification rate reaches over 99.8%.

Quality control: A quality management system from details to the overall situation

Technological innovation: The core driving force for the upgrading of small excavators

Raw material inspection: All raw materials such as steel and hydraulic components must be provided with material certificates, and verified by means of spectral analysis, hardness testing, etc. Unqualified materials are directly rejected.
Process inspection: Each key process (such as welding and heat treatment) is equipped with full-time quality inspectors. Methods such as ultrasonic flaw detection (to detect internal defects in welds) and three-coordinate measurement (to verify dimensional accuracy) are adopted, and unqualified products are resolutely reworked.

Intelligent manufacturing: Digital twin technology is introduced to simulate the assembly and operation of the whole machine in virtual space, so as to optimize the structural design and assembly process in advance; production equipment is connected through the Internet of Things to monitor processing parameters in real time, realizing dynamic adjustment of process deviations.
Green craftsmanship: Environment-friendly technologies such as lead-free welding and water-based coatings are promoted, and clean energy is used in the heat treatment process to reduce carbon emissions and pollution in the production process.

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Mobile/Whatsapp: +86 15376505089
Email：shengshitong66@gmail.com
Address: No. 58 Haichuan Road, High tech Zone, Ji ning , Shandong, China

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