Transportation equipment quality appraisal

transportation equipment quality appraisal is based on the core principles of mechanical reliability, safety compliance and operating efficiency. By optimizing the performance of the power system, the strength of the load-bearing structure and intelligent control, it achieves the synergy of transportation efficiency, safety and environmental protection. It is widely used in fields such as road freight, railway transportation, port logistics and special engineering. In heavy truck transportation, it is used for efficient carrying of long-distance trunk logistics; in the field of cold chain logistics, it meets the balance between temperature control system accuracy and energy consumption; in engineering scenarios, it ensures the impact resistance and fatigue resistance of special vehicles. Compared with general equipment, transportation equipment has the characteristics of wide dynamic load adaptability, strong environmental tolerance, and long maintenance cycle. It is the core equipment of the logistics and engineering transportation system.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide transportation equipment quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for transportation equipment quality appraisal.

With the standardization and upgrading of the transportation industry, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1. Dispute over performance indicators: insufficient power output and attenuation of braking performance;

2. Material defects: insufficient tensile strength of frame steel and poor toughness of welded joints;

3, process problems: uneven depth of carburized layer of gearbox gear, misjudgment rate of ADAS system;

4, contract performance dispute: key configurations (such as retarder brand, on-board diagnostic system version) are inconsistent with the technical agreement.

Litigation quality appraisal of transportation equipment usually adopts the following technical methods:

1. On-site inspection: Conduct on-site inspection of the transportation equipment, take photos and videos, and extract relevant physical evidence.

2. Performance test: Test the performance of transportation equipment according to relevant standards, such as power, braking, stability, etc.

3. Disassembly and analysis: dismantle the transportation equipment and check whether its internal structure and parts are defective or damaged.

4. Material analysis: Test the materials of transportation equipment, such as hardness, toughness, corrosion resistance, etc.

A logistics company of the applicant signed a "Heavy Truck Procurement Contract" with a car company of the respondent, agreeing that the rated engine power is 350kW. The vehicle was unable to climb hills during operation, and the manufacturer argued that it was caused by improper driving operations.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "transportation equipment", contract technical agreements, on-site investigation case materials and other data, and made the following quality analysis opinions:

The actual output power of the engine of the transportation equipment involved in the case was only 310kW (agreement ≥350kW). Cracks in the turbocharger blades caused a 40% decrease in boosting efficiency. Unfused defects in the frame welds accounted for 8% (standard ≤3%). During the dynamic load test, the local stress on the frame reached 1.5 times the design value.

The appraisal conclusion determined that defects in the power system and structural workmanship were the main causes of insufficient performance.

The transportation equipment quality appraisal report should include:

1, appraisal purpose and reference standards;

2, specification of the pipe involved, production batch number, construction record;

3, testing method Methods and equipment list;

4, correlation analysis of test data and failure;