Auto-Discharger Quality Identification

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automatic unloader is based on the core principle of precise positioning and material flow control synergy. By optimizing the unloading speed, positioning accuracy and weighing error, it achieves the synergy of material unloading consistency, system stability and production efficiency. It is widely used in automated production lines in chemical industry, food, medicine and mining. In powder material transportation, it is used for high-precision weighing and unloading; in granular material scenarios, it meets the moisture-proof and dust-proof closed unloading requirements; under high-temperature working conditions, it ensures oxidation-free discharge of metal powder. Compared with traditional equipment, automatic unloaders have features such as intelligent feedback, multi-station switching and explosion-proof design, and are the core equipment for industrial material handling.

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

With the upgrading of industrial intelligence, related quality dispute cases have increased significantly. The focus of judicial disputes is:

1, performance index disputes: discharging speed does not meet standards, weighing system errors;

2, material defects: insufficient temperature resistance of valve seals, sensor linearity deviation;

3, process problems: pneumatic drive pressure fluctuations, multi-bin switching stuck rate;

4, contract performance disputes: core modules (such as imported weighing sensors, explosion-proof control systems) are inconsistent with the technical agreement.

0 Such cases need to pass dynamic flow testing, material failure analysis and system stability verification to clarify the quality responsibility.

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automatic unloader lawsuit quality appraisal mainly includes the following technical methods:

1, physical detection method

The physical detection method is to determine whether there are quality problems in the equipment by testing the physical properties of the equipment. Common physical testing methods include dimensional measurement, hardness testing, metallographic analysis, non-destructive testing, etc. These methods can detect the dimensional accuracy, material properties, internal defects, etc. of equipment parts.

2, chemical analysis method

The chemical analysis method is to judge whether the material meets the requirements by analyzing the material composition of the equipment. Common chemical analysis methods include spectral analysis, chemical analysis, etc. These methods can detect element content, impurity components, etc. in materials.

03, performance testing method

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2 The performance testing method is to evaluate whether the performance of the equipment meets the standards by testing various performance indicators of the equipment. Common performance testing methods include simulation tests, actual operation tests, etc. These methods can detect performance indicators such as discharge speed, discharge accuracy, and power consumption of the equipment.

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44, fault diagnosis method

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6 The fault diagnosis method is to determine the cause and location of the fault by analyzing and judging the fault phenomenon of the equipment. Common fault diagnosis methods include fault tree analysis, expert system diagnosis, etc. These methods can help appraisers quickly and accurately find the cause of equipment failure.

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A chemical factory of the applicant signed a "Purchase Contract for Automatic Powder Unloader" with an equipment manufacturer of the respondent, and it was agreed that the weighing error would be ±0.5%. After being put into production, the error reached ±2.5%. The manufacturer argued that it was caused by electrostatic adsorption of materials.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "automatic unloader", the contract technical agreement, the on-site inspection case materials and other data, and made the following qualitative analysis Quantity analysis opinion:

The linearity deviation of the load cell of the automatic unloader involved in the case is 0.3% (agreement ≤ 0.1%), the deformation rate of the valve seal at 200°C is 15% (agreement ≤ 5%); the pressure fluctuation of the pneumatic system is ±0.15MPa (agreement ±0.05MPa).

The appraisal conclusion determined that defects in sensor accuracy and material temperature resistance were the main causes of the error.

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Automatic unloader quality appraisal report should include:

1, appraisal purpose (such as production loss attribution, technical compliance verification) and reference standards;

2, involved equipment model, control system version, process parameter record;

3, detection method and equipment Preparation list (such as electronic scales, SEM);

4, analysis of the correlation between test data and failure (such as the impact of sensor deviation on error);

05, clear quality responsibility determination conclusions and technical basis;

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26, signature of the appraiser, mechanical engineer qualification certificate and official seal of the organization.

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