Selective Laser Sintering - Sls Stereo Light Curing Molding - Sla
It mainly uses photosensitive resin as a raw material, and utilizes the characteristic that liquid photosensitive resin will cure quickly under ultraviolet laser beam irradiation. The photosensitive resin is generally liquid, and it immediately initiates a polymerization reaction and completes curing when irradiated with a certain wavelength of ultraviolet light (250 nm to 400 nm). SLA focuses on the surface of the light-curing material by focusing ultraviolet light of a specific wavelength and intensity to solidify it sequentially from point to line and from line to surface, thereby completing the drawing of a layered cross-section.
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1, the bearing and shaft with the use of base hole system, the use of bearings and housing with the base shaft system. Bearing size tolerances and rotation accuracy values ​​according to GB307-84.
2, with the bearing with the journal and the bearing box bore according to GB1031-83 requirements, the journal roughness Ra value is less than 1.6μm, bearing housing bore roughness Ra value is less than 2.5μm.
3. When using GCr15 and ZGCr15 steel to manufacture bearing rings and rollers, the hardness value of the rings and rollers should be 61~65HRC; when using GCr15SiMn and ZGCr15SiMn steel, the hardness value should be 60~64HRC. The hardness inspection method and the uniformity of the hardness of the same part shall be in accordance with JB1255.
4, check the bearing radial clearance and axial clearance should comply with the provisions of GB4604-84.
5, rolling bearing inner and outer ring raceway should be no peeling, serious wear, no cracks inside and outside the ring; the ball should be no wear, no serious deformation of the cage, no abnormal noise and vibration when turning, stop gradually stop.
6. For C-class tolerance tapered roller bearings, the contact accuracy between the roller and the raceway of the raceway shall be checked under the effect of a certain load. The contact marks shall be continuous and the contact length shall not be less than 80 of the roller busbar.
Rolling bearing technical standards: