Harvester quality appraisal

combine harvester, also known as grain combine harvester or combine, is a compound operating machine that integrates harvesting, threshing, separation, cleaning, grain collection and other functions. It can obtain grains directly from crops in the field and complete processes such as harvesting, threshing, and separating stems and debris of cereal crops in one go, thus greatly improving agricultural production efficiency. The
combine harvester has a complex structure, including header device, intermediate conveyor device, threshing device, separation and cleaning device, grain collection components, chassis, engine, hydraulic device, walking system, self-monitoring device and transmission system. The control system consists of three parts: operating system, electrical system, and hydraulic system. The hydraulic system mainly consists of oil pumps, oil tanks, hydraulic valves, pipelines, and oil cylinders.
In the case of combine harvester quality appraisal, Zhongke Testing can provide combine harvester quality appraisal services.

1. Functional qualification: Check whether the combine harvester can perform its main functions normally, such as harvesting, threshing, cleaning, etc. Check the working status of each functional component in detail, including blades, screw conveyors, cleaning systems, etc.
2. Structural and design assessment: Evaluate whether the overall structure and design of the harvester is reasonable and stable. Pay attention to the strength and durability of key components, such as cutting tools, transmissions, travel systems, etc.
3. Automation system testing: Ensure that the harvester's automation system is operating normally, such as LCD screens, joysticks, sensors, etc. Test the accuracy and stability of automation systems.
4. Driving comfort evaluation: Evaluate the comfort of the cab and the design of human-computer interaction interface. Examine the quality and functionality of seats, operating levers, instrument panels, air conditioning and other facilities.
5. Safety assessment: Check the safety system of the combine harvester, including brake devices, fire extinguishers, protective devices, etc. Make sure the harvester is safe for the operator and the surrounding environment during operation.
6. Efficiency evaluation: Evaluate the working efficiency of the harvester, including operating speed, operating quality and energy consumption. Compare its performance with similar products.

GB/T 8094-2023 Harvesting machinery Combine harvester Determination of grain tank capacity and grain unloading mechanism performance
GB/T 35488-2017 Combine harvester monitoring system
GB 19997-2005 Grain combine harvester Noise limit
GB/T 8097-2008 Harvesting machinery Combine harvester Test method
GB/T 20790-2006 Half-feed combine harvester Technical conditions
GB/T 29002-2012 Full-feed combine harvester Fuel consumption indicators and measurement methods
GB/T 29003-2012 Half-feed combine harvester Fuel consumption indicators and measurement methods
GB/T 8094-2005 Harvesting machinery Combine harvester Determination of grain tank capacity and performance of grain unloading mechanism
GB 16151.12-2008 Safety technical conditions for operation of agricultural machinery Part 12: Grain combine harvester
GB 10395.7-2006 Safety technical requirements for agricultural and forestry tractors and machinery Part 7: Combine harvesters, feed and cotton harvesters
0GB/T 6979.2-2005 Harvesting machinery Combined harvesters and functional parts Part 2: Evaluation of performance and characteristics defined in vocabulary
1NY/T 2848-2015 Reliability evaluation method for grain combine harvesters
2

Ren purchased a wheeled combine harvester from a machinery company. Later, he discovered that the beam was broken. However, he failed to resolve the problem and had a dispute with the manufacturer.
was entrusted by the court to conduct an appraisal and analysis on "whether there are quality problems" with the combine harvester involved in the case.
identification and analysis results: The
identification and analysis expert group discussed the relevant information and on-site investigation of the combine harvester involved and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
The cause of the beam fracture Because the actual tailor welding method did not match the design drawings, the strength of the top of the girder was weakened; there were changes in the grain size of the metal structure and stress concentration at the weld toe added at the top of the girder and the rear end of the "reinforcement plate". Under the continuous action of periodic external forces, vibrations and bending moments, local cracks appeared and expanded in the weld toe. There is a quality problem with the equipment beam.