The roll crusher roller surface welding method

Squeeze roller surfacing
Qian'an Hip Hing plants using manual arc welding, surfacing double double roller crusher roller surface, has made life of 10 months, 150,000 tons of clinker crushing effect. Welding

points are as follows:
(A) electrode selection: To use D-65, D-667 and 506 electrodes, welding ago, according to electrode for use, the electrode drying and placed in an incubator set aside.
(2) roller surface treatment: roll surface can be divided into local direct welding repair and overall the whole welding cleared after two methods, it can be said that the two

processes. Roll width direction along the uneven wear and patterns, uneven wear and hard spots overall roll surface wear, can take the local repair methods

Direct welding; 5-6 times directly after welding, due to the mother repeatedly withstand high compressive stress, welding microcracks expanding, roller surface will have a

certain thickness of fatigue level, then wear repair time if Direct welding electrodes, easy to produce layers off, so the need for grinding rolls

Thoroughly clean the surface layer and then carry out fatigue resistant layer surfacing. Hip Hing cement plant on the roll surface cleared for the whole repair welding. Either

directly or as a whole cleared welding crusher manufacturer repair welding, grinding roll roundness error and two roll diameter error can not be too large, otherwise it will cause the level of

vibration roller press

And two roller uneven load increased. Cleaning roller surface fatigue level, carbon arc gouging available to clean up, to the fatigue of the roll surface layer of the net plane,

exposing the roller base material layer. Before welding, welding according to instructions for use, for drying welding, weldment preheating, slow cooling after welding.
(3) To use more than one power of 10 kVA or 20 kVA or more DC AC welder. To reverse a DC welder (then the positive electrode). When welding with AC welder required load voltage

≥ 70V, 200A current should be controlled so. Such as no-load voltage is less than 70V, the

To increase the current to weld and base metal full fusion prevail. Bead width and height ratio of 3:1 is appropriate. And the base material so that it actually fused solid, to

form the desired tissue abrasion.
(4) welding sequence and thickness: roll surface after preheating, first with 506 electrode surfacing layer 1-3, looking round the roll. Then evenly deposited several layers of

D-667, to achieve the desired thickness. D-667 after the solder layer welding, surfacing layer and then D-65, cladding thickness of 3-5mm; D-65 solder layer welding

After surfacing layer and then D-65 Ling-shaped pattern. (Roll surface wear produced crushed material must also have the necessary pressure and relative sliding two factors.

Pressure determined by the nature of the material, is often difficult to change while the form of a roll to reduce the surface pattern was in the extrusion process with the

roller surface

Relative sliding, relatively easy. Herringbone early domestic use pattern while the circumference to prevent sliding material, but does not restrict access to the material in

the axial sliding of the extrusion process, particularly in the smaller particles in the extrusion material, the wear is more serious. In contrast, the use of Ling-shaped

pattern

And the middle of the roller surface of hard particles, abrasion resistance for the best. ) Ling-shaped pattern of the side length of 4-5cm, bead width of about 1cm, height of

about 4mm. The wear layer of uniform thickness to seek to the pressing roller is always kept in the course of a circle.
(5) surfacing, to three shifts, people do not break Xiema make weldment maintain a high temperature for a long time.