Cutting Tool Technology Industrial Handbook by Graham T Smith 2 pptx

... 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...

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... 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 the cutting edge. ... diameters – greater than 120 mm, • Limited machine tool power – alternatively, if it is not prudent to switch to another machine tool and/ or lose part orientation and register 24 , •...

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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...

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... are: • High temperatures in the cutting zone – necessitat- ing high temperature resistant and thermally-sta- bility of cutting insert materials, • Cutting force magnitudes are both higher and ... toolpost, allow- ing much greater tool rigidity and cutting stability, al- leviating many of the potential problematic in-service machining conditions. .. Multiple-Boring Tools Twin...

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... through the large automotive component, thereby supporting the machin- ing operation throughout its boring cycle, then retracting on completion, allowing the tool to be held in the machine tool s ... 52 Arithmetic roughness ‘Ra’ parameter – it is the arithmetic mean of the absolute ordinate values Z(x) within the sampling length. It is the most frequently quoted international surfac...

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. ... Experimental and Analytical Twist Drill Tempera- ture Distributions. Int. J. Mach. Tools Manufact., Vol. 30 (2) , 21 7 22 6, 1990. Anderson, P. Good points [Drilling geometries]....

Ngày tải lên: 21/06/2014, 21:20

... sweat is a problem; it is di cult to collect it quantitatively. In actual cases, the sweat components are collected by wiping the skin surface with cotton, gauze or towel; PharmChek TM sweat ... droplets and cho- lesterol crystals. It begins to accumulate in the large intestine at week 16 of pregnancy, and is not excreted before birth; it is excreted 1–3 days a er birth [22 ]. Ostrea...

Ngày tải lên: 22/01/2014, 00:20