How To Repair Main Shaft Of Cone Crusher

Main Shaft Repairing Steps

1. 1.Make the main shaft stand vertical first, with the appropriate items, set up an operation platform for welding operation and locating sieve will fix screw head.
2. 2.Using oxyacetylene frame will be heated to welding preheat, until it turn into dark red, and then start welding.
3. 3.Electrode render with 3.2mm, 4mm formal welding electrode , two electric welding machine is divided into two groups , each group two welder welding symmetrically , asked in order to maintain the temperature , don’t pause the middle.
4. 4.When welding to around 200mm diameter, locating sleeve hinder welder stretch, with homemade pressure tool will be set out rapidly.
5. 5.All welding, the welding place with asbestos rope wrapped insulation, at the same time, with a iron hoop on the axis of the cone body, pour into charcoal inside the iron hoop, using oxyacetylene flame combustion heating delist stress of the butt welding of processing.

Main Shalt Repair Technical Requirements:

In the selection of the welding material, following the principle of strength and toughness is not less than the minimum index value of the base material. Considering the parent material, on the basis of sensitivity of hydrogen include close plastic toughness tensile strength electrode.

Before welding, thread head shaft centerline and the original shalt centerline should be consistent. don’t allow deflection , the shaft in the welding place when using bear tensile stress and pulsating cyclic torsional stress at the same time, adopt U groove is better.

Welding, strictly control the preheating and drying process of electrode and make the necessary hydrogen diffusion heat measure, after treatment and to reduce the creaking tendency in the welding joint.