According to the product positioning of "based on professionalism and practicality first", Metal Processing Magazine has focused on planning three series of books: Taboo Series, Practical Series, and Selection Series. The book "Taboo in CNC Tool Application" is a typical representative of the "Taboo Series" books and was published in March 2023. The book took 4 years to complete and adopted a crowdfunding model. It summarizes 276 taboo cases around common problems in the application of turning tools, drilling tools, milling tools, boring tools, threading tools, cutting and grooving tools and abrasives.
(This case is selected from Chapter 2 of "Taboo in CNC Tool Application" Drilling Tool Application Taboo, written by Liu Zhuangzhuang of Qing'an Group Co., Ltd.)
Drilling Tool Application Taboo Deep Hole Processing Speed Setting Taboo
When processing deep holes, in order to ensure the safety of tool application, the drill processing speed, especially the drill speed, should be set scientifically during the processing process. Generally, when processing deep holes, the drill bit length-to-diameter ratio is very large, such as 25 times the diameter and 30 times the diameter. In this case, the tool rigidity is poor, which will cause the drill to swing at a certain speed. However, during cutting, the drill requires a faster cutting speed and a lower cutting amount per tooth to ensure the durability and safety of the tool. Therefore, the scientific setting of the drill speed is particularly important. Usually, the workpiece is divided into two states: the workpiece is not processed by the drill and the workpiece is being processed. Two different speeds need to be set. See the table below for details.
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