Welded rail press fixtures and materials
1. Bolts and nuts are Q235BF steel parts, mechanical properties and chemical composition GB700-88. The surface accuracy of bolts is 12.5. The nuts meet the requirements of GB 6170-86.
2.The flat washer is Q235AF steel, and the production requirements are in accordance with the provisions of GB97.1-85.
3.The upper cover plate, the base plate, the adjustment plate is ZG270-500. The material conforms to the provisions of 5676-85. It uses the lost wax precision casting. The grade II grade, the dimensional deviation meets the requirements of JZ67-2II precision.