1. The allowance specification of gear forgings shall meet relevant standards.

2. Gear forgings should have a reasonable forging ratio in the production process, and cannot be forged with round steel with similar specifications.

3, can't use billet forging.

4. The material of gear forgings should be the same as that of parts, and the added chemical composition should meet the relevant addition standards. A list of materials should also be issued.

5. Ensure proper temperature and avoid low-temperature forging or overheating.

6. The appearance should be neat and even, and there should be no shortcomings such as folding and disconnection.

7. Forgings shall be subjected to ultrasonic flaw detection, and the gear type shall not be greater than φ3 equivalent, and others shall not be greater than φ4 equivalent, subject to the flaw detection report.

8, normalizing after forging.

9. Write the part number on the forging with paint.

Defects that may occur in aluminum alloy forging process

1. Transverse cracks. There are generally two forms of transverse cracks: surface transverse cracks and transverse cracks. Surface transverse cracks are caused by low quality of raw materials or excessive hammer feed during drawing; The transverse cracks are mainly caused by too fast heating speed or too small hammer feed when drawing.

2. Longitudinal cracks. Tongye Town can be divided into two types: longitudinal surface crack and longitudinal surface crack. The longitudinal surface crack is mainly caused by poor quality of raw materials or excessive reduction during chamfering. The causes of longitudinal crack are similar to ingot drawing, insufficient secondary shrinkage cutting head or fast heating speed, and large temperature difference between inside and outside. It may also be caused by too large deformation of low plastic X material, too large hammer feed and repeated overturning of the same part.

3. surface. The forging temperature is too high.

4. Coarse crystal part. High heating temperature or uneven deformation, and too small deformation (forging ratio).

5. Surface folding. Because the fillet of the flat anvil is too small or the hammer feed is less than the reduction.

6. Migration. Because the heating temperature is not uniform or the amount under the operating pressure is not uniform.

7, mechanics is in line with the requirements. Defects such as unqualified degree index caused by quality requirements of steelmaking or improper heat treatment, unqualified transverse mechanics caused by excessive melting impurities or insufficient forging ratio.

How are aluminum alloy forgings classified?

Aluminum alloy forgings are mainly parts formed by metal pressing. Because this product has many characteristics, it is used in different industries and different fields. We need to know its classification. Aluminum alloy forgings can be used for aircraft classification. Because most of the components on the aircraft are forgings, aluminum alloy forgings are also suitable for aircraft. Aluminum alloy forgings used in aircraft have high wear resistance and corrosion resistance, which can ensure the good safety of aircraft in flight. Then the marine aluminum alloy forgings can be divided into forgings, shaft forgings and rudder forgings. When in use, these ships can connect forgings with each other, which also ensures that the ships have good quality of hydro-electric ring forgings in use. These aluminum alloy forgings are also hydro-electric ring forgings. At the same time, aluminum alloy forgings include mine forgings and petrochemical forgings.

Different cleaning methods are needed in the forging process of aluminum alloy forgings, because there are often grooves on the surface when dealing with aluminum alloy forgings. If there are grooves or spots on the surface of forgings, it will affect its use. In order to ensure the quality of aluminum alloy forgings, forgings need to be cleaned during processing. The cleaning of forgings is mainly aimed at the surface defects of forgings, and when forgings are cleaned, the quality of products can also be effectively improved. The specific cleaning methods mainly include pickling cleaning, sandblasting and shot blasting cleaning, drum cleaning and vibration cleaning. Acid cleaning is to make the surface of forgings smoother by chemical reaction. Sandblasting and shot blasting cleaning will make the surface of aluminum alloy forgings easy to produce, process and harden, and also help to improve the fatigue resistance of parts. Drum cleaning can help remove the oxidized skin and burrs on the surface of forgings, and vibration cleaning can make the surface of ring forgings smoother and achieve the effect of polishing.

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