1 day 1 hr confidence:   Grooving or Cut-off or Cutting
Explanation:
"EMO Hanovre 2011 : Kyocera va y présenter trois nouveaux produits
...
Les nouveaux outils de piquetage et de tronçonnage KGD de Kyocera offrent un excellent contrôle des copeaux grâce à différents brise-copeaux. Un nouveau système de serrage permet aux utilisateurs de bénéficier d'une application stable et fiable. Les porte-outils peuvent accueillir différentes plaquettes pour des applications telles que fonçage extérieur, tronçonnage, saignage. Dans la version à lame, la série KGD peut s'utiliser pour diverses applications de piquetage et de tronçonnage telles que fonçage extérieur ou l'usinage de gorges frontales, il suffit simplement de changer de lame. Une version monobloc, destinée à une grande plage d'applications, est également déclinée dans la série KGD."
From: http://bit.ly/1qErSXp
The KGD range of tools is found in the "cutting tools sections of Kyocera's web site: http://www.kyocera.com.sg/products/cuttingtools/ (see also http://www.kyocera-unimerco.fr/Default.aspx?ID=8140 , these are turning tools)
Kyocera refers to these tools are grooving or cut-of tools (see catalogue: http://bit.ly/1qwurMw).
To be honest, I'm not sure that this is the right track, but as you have "piquetage" used in connection with them, I think it might be a fair bet...?
| Duncan Moncrieff
France
Local time: 11:00
Native speaker of:  English
PRO pts in category: 4
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11 hrs confidence: peer agreement (net): +1 milling or grinding
Explanation:
http://aboutsurgicalinstruments.wordpress.com/2012/02/06/70/
"Milling: Milling is a material removal process, which can create a variety of features on a part by cutting away the unwanted material by machining. Through milling, different features such as serrations, Ratchets, Male & Female box cuttings, different types of grooves etc. are produced in surgical instruments."
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Note added at 12 hrs (2014-09-06 10:54:48 GMT)
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Re Duncan's point in the Discussion, both turning and milling of metal can be done on a lathe. Turning is coarser and milling is finer. However, I do agree with his point about the actual process of "piquetage" as described in this question, which is why I have given my answer such a low level of confidence.
https://www.machinemart.co.uk/shop/.../cl500m-metal-lathemil...
This superbly engineered Lathe can be used for turning, milling and drilling.
www.toolbox.co.uk › Mains Power Tools › Lathes › Metalworking Lathes
Draper 22816 (MICRO-100 KIT) Micro Metal Lathe With Mill & Drill Kits
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Note added at 2 days12 hrs (2014-09-08 11:24:26 GMT)
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Or engraving.
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Note added at 2 days12 hrs (2014-09-08 11:26:14 GMT)
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http://www.2linc.com/engraving_tools_carbide_point.htm
| B D Finch
France
Local time: 11:00
Native speaker of: English
PRO pts in category: 59
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| | Notes to answerer
Asker: Doesn't work in this case because milling & grinding occur earlier on in the manufacturing of this instrument. The piquetage step is more of a finishing step.
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2 days 13 hrs confidence: stitching
Explanation:
Up until the 1850's, all rasps were hand-made. The process is theoretically very simple, but requires years of training to do well and consistently. Steel is forged and then ground to shape. Forging to shape is important because it gives a better structure to the steel. The grinding only serves to smooth the rasp blank perfectly so the teeth will be even. A punch is used to raise a tooth of metal on a piece of steel. Depending on how coarse or fine a rasp you want to make, the size of the punch and the weight of the hammer will vary. The entire surface of the rasp is covered in teeth. Stitching, as this process is called, is followed by straightening the rasp with wooden mallets. This is done very carefully so that the teeth are not damaged. The rasp is then hardened by a case hardening process that leaves the teeth very hard for years of work but only hardens the core of the rasp enough so that it won't bend in use. There are obviously more steps involved; these are the just high points. The key is that the teeth must be of a uniform size and spread out evenly over the rasp's surface so that the rasp cuts evenly.
Almost all rasps made today are made by machine. The manufacturing process is similar to the process described above, with the machine spacing the rasp's teeth. This can produce a good, but not great rasp, as there are several problems with this method. First, and more importantly, the machine's ability to space the teeth precisely results in a rasp that will cut roughly as each tooth follows in the path of its predecessor. Score marks in the wood will occur. Human workers, even trying their best to produce a absolutely regular rasp will end up with minor variations in the placement of the teeth. Consequently, each tooth will cut a slightly different path than the tooth before it, giving the rasp an overall much smoother cut.
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Note added at 2 days13 hrs (2014-09-08 12:18:42 GMT)
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Teeth thickness
Hand stitching doesn’t allow a uniform, evenly raised tooth. On hand cut rasps, those teeth which are higher than others will leave scratches on the workpiece, while those lower will not work at all. GOLD rasps have always evenly raised teeth, since they are stitched using CNC machine tools designed and manufactured by Corradi’s engineers. (From http://www.corradishop.com/index.php?main_page=page&id=26 )
A rasp is covered with patterns of either regularly spaced and patterned (machine-made) or irregularly spaced (handmade) teeth. The teeth on a rasp are formed into the metal through a process called stitching. When a rasp is handmade, stitching involves punching a hardened chisel into the body of the rasp to raise the curved-edge teeth. It's sort of like peeling a banana, and the speed with which a skilled rasp maker can do it is astonishing. For a fascinating video on how the French-made Auriou rasps are hand forged and stitched. (From http://www.woodworkersjournal.com/Ezine/Articles/Whats-the-D...
Reference: http://www.toolsforworkingwood.com/store/more/AU-Hist.html
| Duncan Moncrieff
France
Local time: 11:00
Native speaker of: English
PRO pts in category: 4
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| | Grading comment | You nailed it once I gave you enough context (sorry again for not doing it right away) |
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2 days 13 hrs confidence:
| Reference: Milling and Turning
Reference information:
Milling:
Milling is the machining process of using rotary cutters to remove material[1] from a workpiece advancing (or feeding) in a direction at an angle with the axis of the tool.[2][3] It covers a wide variety of different operations and machines, on scales from small individual parts to large, heavy-duty gang milling operations. It is one of the most commonly used processes in industry and machine shops today for machining parts to precise sizes and shapes.
Milling can be done with a wide range of machine tools. The original class of machine tools for milling was the milling machine (often called a mill). After the advent of computer numerical control (CNC), milling machines evolved into machining centers (milling machines with automatic tool changers, tool magazines or carousels, CNC control, coolant systems, and enclosures), generally classified as vertical machining centers (VMCs) and horizontal machining centers (HMCs). The integration of milling into turning environments and of turning into milling environments, begun with live tooling for lathes and the occasional use of mills for turning operations, led to a new class of machine tools, multitasking machines (MTMs), which are purpose-built to provide for a default machining strategy of using any combination of milling and turning within the same work envelope.
Turning:
Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helical toolpath by moving more or less linearly while the workpiece rotates. The tool's axes of movement may be literally a straight line, or they may be along some set of curves or angles, but they are essentially linear (in the nonmathematical sense). Usually the term "turning" is reserved for the generation of external surfaces by this cutting action, whereas this same essential cutting action when applied to internal surfaces (that is, holes, of one kind or another) is called "boring". Thus the phrase "turning and boring" categorizes the larger family of (essentially similar) processes. The cutting of faces on the workpiece (that is, surfaces perpendicular to its rotating axis), whether with a turning or boring tool, is called "facing", and may be lumped into either category as a subset.
Turning can be done manually, in a traditional form of lathe, which frequently requires continuous supervision by the operator, or by using an automated lathe which does not. Today the most common type of such automation is computer numerical control, better known as CNC. (CNC is also commonly used with many other types of machining besides turning.)
Both turning and milling can either be fine or coarse depending on the tools used and the result desired.
Reference: http://en.wikipedia.org/wiki/Milling_(machining)
Reference: http://en.wikipedia.org/wiki/Turning
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