Slewing Bearing Construction Machinery stomatal or dissection as a result of material on, roll-Road Tour hardened layer hardness, the depth of non-uniform, such as manufacturing quality problems or the reasons for some of the outside world, resulting in hardened layer Raceway off or broken tooth ring gear, equipment will not work properly.
Layer stripping for the Raceway, the first judge to be correct. Delamination occur, the general is not easy to see in the external. According to our experience, when the South following that there is delamination Raceway: Host with rotary set, the Rolling Road Department "pyronaridine - pyronaridine" abnormal sound, turn the speed of non-uniform or a much slower speed and direction with there was a slight vibration; rotary current motor temperature rise too high or too large; rotary motor with hydraulic coupling or coupling keyway so bad, such as being squeezed.
After stripping layer appears to be repaired in time. Otherwise, delamination area will be expanded to the entire slewing bearing scrap.
Repair method is: first slewing ring roller or ball inside out, so that separation of inside and outside the ring; use gasoline to clean Raceway; and then use the grinder (wheel) carefully peel layer needle the United States District of Microsoft around the crack has been generated by refining its stand of the hardened layer will be removed at the bottom of delamination; Raceway required to use welding and cutting torch Welding Department preheating, with facilities in the carbon steel welding electrode (welding rod must be dry before use, and with the With the use of drying), to solder the surface layer is slightly higher than Raceway 1-2mm; deeper delamination or if larger, shall be sub-stratified welding facilities, not to materials caused by high temperature deformation; this to avoid welding cracks have rapid cooling after welding insulation measures should be taken immediately so that he gradually cooling. Removed after cooling grinder repair welding layer, making it slightly higher than the raceway surface, oil stone or emery cloth metallographic grinding gradually repairing layer form so that it corresponds to the surface normal Raceway highly consistent with the original curvature of the corresponding model testing, until the qualified so far; Road petrol and roller cleaning roller (ball) on the James grease into one complete assembly.
Slewing ring gear may be caused by broken teeth, the teeth of the cast materials quality segment (if trachoma, mezzanine and other defects, so that the bending effect gear reduced); use of the process of meshing tooth embedded in rock or reinforced Department and other a hard object, so that partial tooth fracture bending stress increase.
Repair method is to insert partial or repairing tooth repair, partial repair welding method is: first part of the residual damage to the matrix crack wheel with hand-held refining its stand, with gasoline (oil) cleaned; torch used in this part of warm-up, When reaches a certain temperature, the use of carbon steel electrode in the teeth welded onto the damaged parts of the tooth shape, tooth surface to make it higher than the political parties 1-2mm; selected experienced fitter machine repair, in accordance with the profile model testing, until the profile in line with the requirement.
When the rotating ring gear of an entire tooth damage can be cut along the tooth root, tooth root and then file a certain shape, as shown in Figure 1. Similar re-used in the storage ring gear cut a tooth, processed into the corresponding shape and materials, the Add shafts stuck with tooth positioning template. Pitch in order to ensure consistency, and value-added two-wire chuck tight, the teeth surrounding the use of low-carbon steel welding. Finally, the use of tools such as file Xiuping weld to ensure the stability augmentation can gear meshing.
