How to identify the quality of gear steel

1. Introduction to gear industry and mechanical equipment

Gears are widely used parts in transmission machinery. Their main function is to transmit motion and power and change the speed and torque of transmission. Gears are composed of gear teeth and gear rings. There are many types of gear teeth, such as spur teeth, helical teeth, herringbone teeth, etc.

Second, litigation quality identification background

In the process of gear manufacturing and use, there are occasional disputes caused by quality problems, such as gear breaks, severe gear wear, and unsuccessful accuracy. When disputes cannot be resolved through negotiation, companies or consumers and enterprises are often resolved through litigation channels. At this time, the quality appraisal of the gear is needed to find out the nature and causes of gear defects, and provide a professional basis for the court's decision.

3. Technical method of litigation appraisal

Gear quality appraisal is usually carried out by qualified product quality appraisal agencies. The appraisal agency will use the following technical methods based on the specific situation of the gear:

1. Visual inspection: Observe the appearance of the gear to observe whether the gear has defects such as cracks, lack of teeth, and corrosion.

2. Size measurement: Use the precision measurement instrument to measure the size and geometric shape of the gear to check whether the gear meets the drawings requirements.

3. Hardness test: Using the hardness test of the gear with the Robe or Vitzan hardness meter to evaluate the abrasionability of the gear.

4. Fatigue Test: Test fatigue test on gears, simulate the force of the gear in actual work, and evaluate the fatigue strength of the gear.

5. Gold phase analysis: Merge the gold phase analysis of the gear section, observe the tissue and defects of the gear, and judge the material and processing process of the gear.

Fourth, litigation appraisal report content

The content of the gear quality appraisal report mainly includes:

1. Entrust party information: The name of the appraisal party and the entrusted matters.

2. Gear sample information: gear model, quantity, manufacturer.

3. Appraisal method: Appraisal technical method adopted.

4. Appraisal results: Appraisal conclusions on the appearance, size, hardness, fatigue strength, etc.

5. Defective cause analysis: Analyze the possible causes of gear defects, such as material defects, improper processing, improper use, etc.

6. Appraisal Opinions: Based on the identification results and analysis, whether the quality of the gear meets the requirements to propose the appraisal opinion.

5. Conclusion and industry impact of litigation appraisal

The conclusion of gear quality appraisal has an important impact on the judgment of the lawsuit. The conclusion of the appraisal can clarify the nature and causes of gear defects, and provide a basis for the court to determine the responsible party and the amount of compensation.

Gear quality appraisal also helps industry quality improvement. Through the analysis of the identification results, we can find the weak links in the process of gear manufacturing or use, and provide a reference for enterprises to improve product quality and improve their service life.

6. Expand related knowledge

The quality appraisal of gears includes national standards, industry standards and corporate standards. Among them, national standards have made detailed provisions on the geometric accuracy, strength and material performance of the gear. Industry standards are mainly targeted at the special requirements of specific industries, while corporate standards are for special requirements for the company's own products.

7. Quality Appraisal Agency

It is recommended to choose a qualified third -party product quality appraisal agency for gear quality appraisal. The Jiangsu World Inspection Quality Appraisal Agency is an independent third -party product quality appraisal service agency and has rich experience and professional technologies in the field of gear quality appraisal. Jiangsu World Inspection adheres to the principles of justice, objective, scientific, and accurate, and provides customers with professional and authoritative product quality appraisal services.