Views:4 Author:Site Editor Publish Time: 2021-09-14 Origin:Site
Deep hole of rolling mill roll is processed on ordinary drilling machines, lathes, boring and milling machines, and large holes are first drilled and then bored using a lathe or boring machine. Generally speaking, deep holes generally refer to holes with a length-to-diameter ratio greater than 10. For deep holes with a length-to-diameter ratio greater than 50mm, due to the impact of the rigidity of the lengthened drill bit, it is necessary to ensure that the processing is not eccentric during the processing. which is a great difficulty.
Features of deep hole machining of rolling mill rolls
Several major problems in hole processing: chip removal, heat dissipation and guiding problems, mainly manifested in:
①When drilling, you cannot directly observe the cutting condition of the tool. During the working process, you can only judge whether the cutting process is normal by listening to the sound, watching the chips, touching the vibration and other appearance phenomena;
②The length to diameter ratio of the hole is large, the drill rod is thin and long, the rigidity is low, it is easy to vibrate, and the drilling is easy to deviate. Therefore, support and guidance are very important;
③The cutting heat is not easy to dissipate, and the working conditions are bad, so an effective cooling method must be adopted.