Small room ac motor bearing rolling process

Small ac motor bearings rolling process of 2018 - room 12 - 12 high powder ling, 【 Abstract 】 Introduction on the vertical drilling machine with rolling head for small ac motor bearing chamber the rolling technique, thus improve the machining precision of the bearing chamber, greatly reduce the possibility of a bearing failure, reduce the security hidden danger in the motor is running. 【 Keywords 】 Small ac motor bearing chamber; Vertical drilling machine; The machining accuracy; Bearing failure; With the continuous development of railway transportation safety, railway motor market share also will increase. As is known to all, bearing is the main part of the machine, so on railway motor end cover of the bearing chamber accuracy put forward higher request, For roughness of Ra1. 6～Ra0. Between 8) , if the end cover of the bearing chamber accuracy can not meet the requirements, will enable the bearing outer ring and bearing chamber extrusion lead to bearing failure, and the safety of the railway transportation industry brings great hidden trouble. Yet on the CNC lathe processing method can't satisfy completely the requirements of the precision of the rail motor, through continuous learning and research I put forward the method for rolling bearing chamber, the roughness can achieve Ra0. 4～Ra0. 2, this method can meet the requirements of railway chamber and high precision of motor bearing. 1. Processing equipment and tool set auger Z5140A, superfinishing diameter roller head ( 5. 5 ~ 350) , outside micrometer, inner dial indicator, plug gauge. 2. Process to prepare 2. 1 prepare two copies of kerosene, each about 1 liter, a when used for rolling lubrication rolling head, a roll is used for washing head of iron filings. 2. 2 for rolling bearing housing to verify whether press with rolling allowance in table 1. Table 13. Process 3. 1 will be processing the end cover mouth flat side down, stay close to any partner to pin anti-rotating. 3. 2 use outside micrometer head roll diameter, roll measurement due to the elastic cushion roll with clearance, need to confirm the measurement point as the largest diameter measurement points, and the roll rotation. Measurement shown in figure 1. 3. 3 according to the bearing chamber inner hole survival size tolerance 'minimal size value + 0. 02 'adjustment of cutter diameter. Adjustment method for rolling head, rolling head aluminum sleeve to direction of the taper shank, clockwise (under the condition of not loosen Expand) Or counterclockwise ( Narrow) Per rotation, scale value is 0. 0025 mm, the deviation control is accurate, mechanical trimming device in 0. Within 005 mm. 3. 4 will be rolling head installed in a vertical drill spindle taper hole ( When rolling head of choose and buy, should be based on vertical auger spindle Morse taper) And adjust the bearing chamber after center is consistent with the main shaft center, rolling processing, processing of the process parameters are shown in table 2, the processing of machine tool spindle to counterclockwise, rolling and add lubricating oil. 33. After 5 processing in place, rotating handles, exit the rolling head. Because of the pressure head will automatically reducing, exit will not be processed surface damage. 3. 6 needs regular cleaning roller head. （ 1) Method for rolling pressure head of vertical rolling parts in kerosene, rotating tail handle, visible from scrap iron. Repeat until all iron filings, pressure on the head of each roll can turn flexibly. （ 2) Verified through practice that this kind of machining method of bearing, and fully ensure the accuracy of the bearing housing requirements, and easy to operate, improve the quality of the products. 4. Conclusion through several batches of production verification, this method can not only improve the production efficiency, and ensure product quality, low input costs, at the same time the rolling head can also be in boring machine, lathe, milling machine, machining center, and is suitable for ordinary motor required high but the precision of batch production.