National standard lifting ring chain lifting chain specification and technology

RELEASE TIME :

2020-06-09

National standard lifting ring chain lifting chain specifications and technology, the state has relevant specifications. Shandong Deyao Electromechanical Technology Co., Ltd. introduces the correct choice of national standard lifting chain and the specification of national standard lifting chain through size and material.

One. Size

1. The diameter of the material of any section of the finished chain shall be equal to the nominal size and its tolerance shall meet the requirements of the relevant standards. When measuring, the average value of two measurement results perpendicular to the same section should be taken. The weld and the straight edge of the chain ring should be avoided during measurement to avoid the cross section deformation caused by the contact of the chain core mold, thus affecting the measurement results.

2. The length and width of other dimensions of the chain as well as the pitch of the high-precision chain and the length of several links shall meet the relevant standards.

Ii. Materials, heat treatment and manufacturing

1. The materials of the material chain shall meet the requirements of the relevant standards. Subject to the satisfaction of these requirements, the manufacturer shall select a steel so that the finished chain meets the mechanical properties requirements of the relevant standards.

2. All chains shall be heat-treated in accordance with relevant standards prior to application of manufacturing verification force.

3. Manufacturing process Flat or asymmetric welds should be located in the middle of the chain ring. The size of the material affected by welding on both sides of the chain split arm shall not exceed the value specified in the relevant standard. Welding should not be misaligned anywhere, resulting in a dent in the outer contour of the chain ring. 3.2. Trim 3. 2.1. Flat welding chain should eliminate the flange formed by welding. 3.2.2. Asymmetrical welding chain shall eliminate the flange formed by welding on the outer surface of the chain link, and keep the flange on the inner surface.

4. The finished chain shall include a surface coating, if any.

5. After heat treatment and process treatment, the finished product chain shall pass the manufacturing verification force specified in the relevant standards. The testing machine shall meet the requirements of Appendix A. When the chain is put into the tester, it should not be twisted. After the inspection force is removed, the supervisor shall carefully inspect and replace the unqualified chain link. In the chain, the chain should be flexible rotation. When surface treatment processes such as pickling or electroplating are used, the chain is at risk of brittleness and a manufacturing verification force should be re-applied to the finished chain. In order to test the chain after using the verification force, appropriate equipment and lighting should be provided.

6. During the manufacturing process, any link connected to the chain shall be treated to ensure that each link in the finished chain is in the same state. If the chain is entered after a manufacturing verification force has been applied, the part of the chain affected by the entry process shall be re-subjected to the manufacturing verification force and inspection.

7. Breaking force and total ultimate elongation The breaking force and total ultimate elongation of the finished chain shall at least meet the requirements of the relevant standards.

8. The minimum bending resistance of the finished chain shall meet the relevant standards.

The above is the Shandong Deyao electromechanical Technology Co., Ltd. on lifting ring chain lifting chain specification and technology introduction, I hope to be useful to you.

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