Cutting Tool Technology Industrial Handbook by Graham T Smith 5 pot

... combination of materials that constitute the cutter’s tool edge. Today, manufacturers of tooling have a strategy for continuous improvement with varia- tions in both tool matrices and coatings being ... stability of the workpiece -tool- machine set-up, other factors that could aect geometry selection include: whether con- tinuous, or intermittent cutting occurs, any tendency towar...

Ngày tải lên: 21/06/2014, 21:20

... factors, pos- sibly the most important one is that the swarf should ow smoothly away from the cutting area, as with the latest chip-breakers tted to today’s cutting inserts, chips can be readily ... Chip-breaking Technology  consistent manner (3). It was found with this work- piece material in an experimental cutting proce- dure, that the tangential cutting force component,...

Ngày tải lên: 21/06/2014, 21:20

... aecting both the ma- chined surface texture and shortening tool life. Chip formation and its resultant morphology, is not only aected by the cutting data selected, but will be inuenced by the ... operations with the same tool, together with many other combined proled features. All of these opera- tions make signicant demands on the adaptability of the cutting insert’s geo...

Ngày tải lên: 21/06/2014, 21:20

... conventional twist drill is depicted in Fig. 44a. From this illustration two dis- tinct cutting regions can be established: rstly, the main cutting edge, or lips; secondly at the intersection of the ... point and is produced by the line-of-contact, as the drill point initially touches the component’s surface, causing it to ‘walk’ until the feed/penetration stabilises itself at th...

Ngày tải lên: 21/06/2014, 21:20

... cutting forces generated are balanced, not with respect to the cut- ting edges – as is the situation with Twist drills – but invariably, by pads that are situated at 90° and 180° to that of ... in the ute as the chip attempts to exit the deep-drilled hole. Notwithstanding the problems associated with BUE, which hinders the tool s ability to break chips. Coolant control and its .....

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... manufactured as solid one-piece tools, where the cutting edge was ground to the desired geometry by the skilled setter/operator, which meant that their useful life was to some extent restricted. ... ‘Qualied Tooling’ , refers to setting the tool s osets, with all the known dimensional data for that tool, allowing for ease of tool presetting and ecient tool- changing – more wi...

Ngày tải lên: 21/06/2014, 21:20

... such, the slug is free to move out-of-phase with the cutting conditions, dictated by the boring bar’s applied cutting forces, thereby the onset of chatter will be potentially ‘cancelled out’. the ... are: • High temperatures in the cutting zone – necessitat- ing high temperature resistant and thermally-sta- bility of cutting insert materials, • Cutting force magnitudes are bo...

Ngày tải lên: 21/06/2014, 21:20

... is to only turn the tool in the cutting direction and, never reverse it (e.g. is is the standard practice in cutting a thread with hand taps), as the reamer’s cutting edges will immediately ... with straight utes are usually utilised to ream blind holes, but with the absence of chip space at the bottom, this means that swarf must be evacuated by the utes. For virtually all o...

Ngày tải lên: 21/06/2014, 21:20

... calculated to the outer di- ametral dimension of the part feature to be machined. Solid post-drilling tooling can usually be operated at higher cutting data to that of their modular tooling counterparts. ... the other side of the part, then circular interpolation techniques are used to create the required back-face. NB  With most of these post-drilling operations, the cutting data i...

Ngày tải lên: 21/06/2014, 21:20