GUHRING - Каталог Сверла - вся линейка инструмента - 2013 EN. Guhring каталог сверла


GUHRING - Каталог Сверла - вся линейка инструмента

Ниже представлена эта же страница в формате, позволяющем производить копирование текста.

для размещения заказа - [email protected] Machining technology Both findings (spray pattern and reaction time) show the Because a vector analysis is carried out for the flow, it is conical shank end and the shank end with labyrinth seal to be possible to analyze the flow pattern according to the direction superior to those with plain shank end. Subsequently, only the of flow. Hereby, the speed vectors are examined for forward conical shank end and the shank end with labyrinth seal were and reverse flow. Any turbulence formation has a forward and deemed suitable for further examination and optimization. reverse flow. Often, turbulence occurs in dead areas. At this point totally opposing statements can be made for single and With the assistance of a CFD two coolant duct systems. analysis, the form and size of the connection slot at the Whilst dead areas in single coolant duct systems lead the shank end were examined. medium to be deposited on the wall and separating thanks The picture on the left to the flow speed within the turbulence, dead areas in two shows the flow profile coolant duct systems are areas requiring to be filled before the within the connection shank medium can continue. Based on the produced flow patterns, end – adjustment screw for conical shank end B with wide connection slot and rounded a conical shank end. Various base proved to be the optimal solution. slot forms were analyzed. An analysis of the two requirements “simple handling” and “cost-effective production” painted a similar picture. The following table shows the respective evaluation, whereby the data refers to the shank end and the corresponding screw. Relevant features for process reliability, such as “minimal dead areas” and being “leakproof” provide criteria for excluding the two versions with plain shank ends. Subsequently, the most favoured shank end is the one with a conical end and a wide slot with rounded base. A: Narrow slot with B: Wide slot with rounded base rounded base C: Wide slot with round- D: Wide slot with convex base convex base Technical Spray patterns were also produced for the above slot forms, showing a tendency to solution B. However, the variations were marginal but the CFD analysis showed a clearer picture. Shank end Handling Cost-effective production Minimal dead areas Leak-proof geom. analysis Plain w/o slot ++ ++ - - ++ + - - Plain w. sickle-shaped slot ++ + + ++ Conical with slot - - ++ ++ Recessed end with labyrinth seal ++ = very good properties, + = good properties, - = poor properties 396 [email protected] www.guhring-tools.ru

guhring-tools.ru

GUHRING - Каталог Сверла - вся линейка инструмента

Ниже представлена эта же страница в формате, позволяющем производить копирование текста.

для размещения заказа - [email protected] GUHRING USA Brookeld, WI For more than 35 years, Guhring Inc. (USA) has brought the innovations of industry- leading Guhring technology, products and technical support to the United States. One company, one brand, same name known throughout North America for quality for over three decades. Guhring is also the leader in tool reconditioning services with the opening of our fourth 86$IDFLOLW\LQ%ORRPHOG CT. Combined with our reconditioning and coating IDFLOLWLHVLQ%URRNHOG:,1HZ +XGVRQ0,DQG+XQWLQJWRQ Beach, CA, Guhring is the only company that can provide nationwide coverage to support their customers. Need an economical solution? A category of drills, taps and variable helix carbide end mills called Guhring Select tools is for you. These tool series are manufactured from the same materials and to the same quality and exacting tolerances that you expect from Guhring. Each series has been selected because of its versatility in a wide range of materials and machining operations, to provide you with a full compliment of quality drill, tap and milling options at an economical price. Simplify your tool search by choosing Guhring Select. These tools offer a full range of economical, quality, machining solutions. From the production facility to the small prototype machine shop, there is a Guhring Select tool that will suit your needs. Look for the Guhring Select logo to quickly identify these economical tooling choices. 20 [email protected] www.guhring-tools.ru

guhring-tools.ru

GUHRING - Каталог Сверла - вся линейка инструмента

Ниже представлена эта же страница в формате, позволяющем производить копирование текста.

для размещения заказа - [email protected] Minimal Quantity Lubrication (MQL) Technology and advantages Guhring is heavily engaged in the subject of minimal MQL suitable coolant delivey quantity lubrication and occupies one of the top positions in The coolant delivery has also been subject to an in depth this technology. In addition to the suitable MQL geometry, analysis. The result is the recently developed MQL delivery our priority lies especially in the optimal delivery of the system consisting of a one-piece delivery pipe, with a coolant in the vicinity of the tool holder. Therefore, we thin-walled stainless steel pipe glued-inside and a MQL have developed a suitable MQL shank end for our cutting adjustment screw. The advantages of this solution are: tools and a suitable MQL coolant delivery system for the application with our tool holders. sSIMPLEINSTALLATION sOPTIMALFLOWCONDITIONS sTHECOMPLIANCYOFTHEDELIVERYPIPE sCOST EFFICIENCY Shank end suitable for MQL MQL considerably reduces the operating temperature Because an extremely low volume of lubricant is applied In comparison to entirely dry machining, MQL can with minimal quantity lubrication, the delivery of these considerably reduce machining temperatures. The result is low coolant quantities to the effective area is of utmost longer tool life and increased process reliability. Thermo- importance. Hereby, the geometric design of the shank graphic experiments at Guhring showed that cooling end is of main significance for a secure delivery of the with dry air reduces the temperature at the tool point by lubricant. more than 200 degrees. The addition of a few milliliters of In a comprehensive series of tests we have thoroughly neat oil per hour, hence MQL, resulted in an even lower investigated different geometric designs of the shank end temperature thanks to the reduced friction. and subsequently determined the optimal design. The Guhring developed conical shank end optimally satisfies the relevant MQL conditions: Toolholders sNOLUBRICANTPOCKETS sMINIMALDEADAREA sSIMPLEOPERATION sCOST EFFICIENTPRODUCTION Chip Air MQL Tool Tool temperature comparsion Work- piece without 431°C Tool temperature [°C] 196°C 145°C Effective cooling without Air MQL Guhring has determined the heat development at the drill point when applied without cooling or with internal cooling with air or MQL respectively. With MQL, the temperature of the tool and subsequently the transfer of heat to the workpiece is considarably reduced. 356 [email protected] www.guhring-tools.ru

guhring-tools.ru

GUHRING - Каталог Сверла - вся линейка инструмента

Ниже представлена эта же страница в формате, позволяющем производить копирование текста.

для размещения заказа - [email protected] Machining technology Dry machining and minimal quantity lubrication (MQL) Dry machining and minimal quantity lubrication (MQL) are The thermal imaging of the tool point show a clear important current technologies with the aim of reducing connection between the rake angle and the heat generated. production costs. Guhring has invested heavily in these A positive rake angle resulted in a clearly lower temperature technologies and developed tools as well as tool holders being generated in the shear zone of the chip, because with with optimal geometries for this type of machining. An a tool with a 30 helix the chip only requires deflecting by observation of the thermal conditions at the tool and the 60 (reduced shearing action), whilst the chip deflection for a workpiece was therefore extremely important. straight-fluted tool is 90 (increased shearing action). Basic observations The heat generated in the shear zone directly enters the Because with dry and MQL machining, any generated heat process as cutting heat. A shorter chip transfers less frictional is not dissipated via coolant like with conventional wet heat to the tool due to a smaller contact area on the flute machining, the design of the optimized tool must ensure surface resulting in improved temperature conditions that. s(EATGENERATIONISMINIMIZEDDURINGTHEMACHININGPROCESS In addition, the chipflow was recorded using a high-speed (i.e. through sharp cutting edges and a positive rake angle camera. With the cutting parameters vc = 300 m/min and f = whilst increasing the cutting parameters), 0.35 mm/rev., distinct differences were apparent regarding the chip evacuation and the process heat. Chip evacuation, s&RICTION IS MINIMIZED IE THROUGH A WIDTH REDUCTION OF i.e. the continuous transportation of chips from the hole, the leading margins in comparison to the wet tool and improved when the helix angle of the tool was increased. increasing the back taper of the tool), This is primarily due to a positive geometry and the resulting s(EATTRANSFERBETWEENCHIPANDTOOLISREDUCEDIETHROUGH improved chip fracture, providing a shorter shearing chip heat insulating hard coatings and polished tool surfaces to that, due to its improved surface-volume-relationship, can reduce the friction between chip and face), be evacuated from the hole with greater ease and is less prone to jamming in the flute. s(EATTRANSFERBETWEENCHIPANDWORKPIECEISREDUCEDIE through improved chip evacuation from the hole or from the work piece surface respectively). Influence of rake angle on temperature To examine this parameter, Guhring produced three drilling test tools in 10 mm diameter for a drilling depth of 100 Thanks to considerably improved chip evacuation and comparatively lower process temperatures, spiral-fluted mm. The tools were geometrically the same, however, the tools play an important role in the increased process reliability in dry machining and MQL applications. tools had different spirals and subsequently different rake However, the application of straight-fluted drills can be of angles.The test tools had 0 (i.e. straight-fluted), 15 and 30 advantage for the machining of aluminium and cast iron materials, where the demand for hole quality (improved 0° rake angle rake angles. The internal coolant roundness and reduced run-out) is high. This is because f °C duct diameter of the tools was straight-fluted tools generally possess four leading margins. In addition, the temperature profile of straight-fluted drilling identical. tools can be reduced by an optimized, geometric design of the coolant ducts to an extent that the thermal disadvantage 55 in comparison to spiral drilling tools is compensated to a large degree. Technical point of drill 50 Using a thermal imaging camera, entry the heat generated during the 15° rake angle 45 machining of a hole in Al-alloy AlSi7 was taken in real time and 40 documented. The sheets applied for the test had a thickness of 35 14.00 mm and were drilled on the face so that the remaining 30 residual wall between the hole and thermo-graphic examination 30° rake angle 25 of the sheet surface was 2.00 mm. Using the above test layout it was possible to make a qualitative 20 analysis of the heat generated by D = 10 mm, AlSi7 the individual tools. 15 fvuc = 300 m/min, = 0.35 mm 392 [email protected] www.guhring-tools.ru

guhring-tools.ru

GUHRING - Каталог Сверла - вся линейка инструмента

для размещения заказа - [email protected] Machining technology good chip evacuation, whereby the tool geometry also plays To optimize drills for the MQL technology, Guhring is an important role. Short chips, large flutes with polished increasingly applying the Finite-Element-Method (FEM). surfaces – possibly MolyGlide-coated – can provide the FEM allows the dimensioning and optimization of the tools solution. during the design phase.The flute in the area directly behind the cutting edge has the task to mould the chip in order to In a few dry machining applications, air is used for cooling. break it as small as possible. In the rear area its task is to Obviously, tools with coolant ducts are applied, through evacuate the chip as quickly as possible. These tasks apply which air is delivered to the hole. Air not only cools tool and to wet machining, minimal quantity lubrication as well as work piece, but under the correct pressure also improves dry machining. With minimal quantity lubrication and dry chip evacuation. machining, however, it is extremely important to provide the chip with minimal frictional resistance in the rear area, Interestingly, dry and HSC machining do not exclude one in order to ensure a problem-free chip evacuation. This another, as one would expect. On the contrary, modern is aided by an optimized flute form as well as a specially carbide drills and coatings allow so-called dry HSC – dry polished flute surface. high speed machining, combining the advantages of the two machining trends, as for example, a reduction in production Flute design to suit MQL costs in certain applications. With the assistance of the aforementioned FEM-analysis, it is possible to simulate the flow resistance of a flute with chip, subsequently providing optimized flute forms for different material classes. The following image shows a flow optimized flute form and point design, providing optimal chip flow and also minimizing the thermal load of the cutting edge thanks to an optimized through flow of the point area and the flute by the MQL aerosol. Minimal quantity lubrication MQL MQL or minimal quantity lubrication works with an air- lubricant-mixture, that only contains a small part of lubricant. Technical In the past, the technology of minimal quantity lubrication In addition, improved chip evacuation and therefore in- was generally applied on the own initiative of the user, in creased process reliability is provided by a MQL-suitable order to reduce costs. Often, tools for wet machining were coating. Guhring has developed a double coating, simply applied under MQL conditions. With this approach, consisting of a hard coating with an additional soft coating, the limits of the tools’ efficiency were reached very quickly MolyGlide. Tests confirm a considerably higher chip and it became clear that a mere substitution of the lubricant evacuation speed for the MQL tool with the above coating was not a targeted approach. in comparison with conventional tools. A professional approach during the design of MQL suitable Coolant delivery to suit MQL tools nowadays allows considerable performance increases Because an extremely low volume of lubricant is applied whilst maintaining process reliability. Hereby, all the drill’s with minimal quantity lubrication, the delivery of these relevant attributes for providing efficiency and process low coolant quantities to the effective area is of utmost reliability, from the cutting edge to the flute as well as the importance. Hereby, the geometric design of the shank end shank end, are adapted to satisfy the special demands of is of main significance for a safe delivery of the lubricant. MQL. As well as the choice of carbide, this also includes the special tool geometry, the tool coating and the design of the shank end for MQL drills. 394 [email protected] www.guhring-tools.ru

guhring-tools.ru

GUHRING - Каталог Сверла - вся линейка инструмента

Ниже представлена эта же страница в формате, позволяющем производить копирование текста.

для размещения заказа - [email protected] General Information Coolant pressure and volumes The illustrated optimum, good and minimum required in the examples for particular work piece materials. For coolant volume apply only to spiral-fluted Ratio drills type example, the loss in tool life through low pressures when RT 100. In contrast to the pressure, which is a feature of machining grey cast iron is considerably higher than when the machine tool; the cooling system fitted to it and also machining AlSi alloys. But this is only the case when the AlSi the possibility of leakage, volume does not depend on the alloy is short-chipping! The absolute necessary minimum machine (fig. 1). The pressure figures given are therefore pressure or good pressure should, when machining cast recommendations which serve only as guidelines. iron, be generally a little higher than for AlSi machining Ratio drills type RT 80 with central coolant duct are subject (figures 3 and 4 ). to different standards (fig. 2). The diagrams shown are for Ratio drills in their most important application, machining The recommended values are to be used only for drilling of steel. depths of up to approx. 5 x D. Deeper holes should be But they are also guidelines for the machining of other produced with tools having internal coolant ducts, as for materials, primarily because the highest coolant pressures example RT 150 GN, otherwise the production of deeper are constantly required for the machining of steel. The holes (depending on the material) becomes uneconomical. effects of cooling using straight-fluted Ratio drills type RT 150 is particularly sensitive and is clearly demonstrated Required coolant pressures Required coolant volumes optimum pressure optimum volume good pressure good volume minimum pressure minimum volume coolant pressure p [bar] coolant volume V [l/min] coolant pressure p [bar] coolant volume V [l/min] tool diameter d [mm] tool diameter d [mm] fig. 1: fig. 2: Required coolant pressures and volumes for RT 100 Ratio drills with Required coolant pressures and volumes for RT 80 Ratio drills with cen- internal spiral coolant ducts. tral internal coolant duct. Technical coolant pressure p [bar] coolant volume V [l/min] coolant pressure p [bar] coolant volume V [l/min] tool diameter d [mm] tool diameter d [mm] fig. 3: fig. 4: Required coolant pressures and volumes for straight-fluted Ratio drill Required coolant pressures and volumes for straight-fluted Ratio drill type 150 GG when machining cast iron. type 150 GG when machining AlSi7. 376 [email protected] www.guhring-tools.ru

guhring-tools.ru

GUHRING - Каталог Сверла - вся линейка инструмента

Ниже представлена эта же страница в формате, позволяющем производить копирование текста.

для размещения заказа - [email protected] Cutting group Twist Drills Drill/Chamfer Inserts HOLLFELDER CUTTING TOOLS The cutting data recommendations in the table are guide values and depend to a high degree on the stability of the machine, xture and workpiece. Material group Composition / Structure Tensile Hardness Cutting speed Recommended Feed rate fz mm/z strength cutting grade vc m/min 1.1 C = 0,1 -0,25 annealed, long cut RM HB G16 W 2006-…. W 3006-…. 1.2 (MPa) HRC 100-160 0.05-0.15 0.07-0.15 2.1 110-160 G16 2.2 C = 0,1 -0,25 annealed, short chip 420 125 90-150 K10/G12 3 420 125 100-160 4 Unalloyed steel C = 0,25 -0,55 annealed, long cut 620 190 90-150 K10/PKD 5 Cast steel 640 190 80-140 K10/G12 6 Machining steel C = 0,25 -0,55 annealed, short chip 850 250 75-125 K10/PKD 915 270 90-140 7 Low-alloy steel C = 0,25 -0,55 tempered 1020 300 G16 Cast steel 610 180 60-110 K10 8 Machining steel C = 0,25 -0,8 annealed 9 275 60-110 High-alloy steel C = 0,25 -0,8 tempered 60-100 10 Cast steel 300 High-alloy annealed 350 60-110 11 tool steel Stainless steel tempered 930 250 12-13 and cast steel Stainless steel tempered 1020 14.1 tempered 1190 14.2 Grey cast iron 15 Cast iron with annealed 680 16 nodular cast iron 17 Malleable hardened and tempered 1100 325 50-60 18 Aluminium 19 forging alloys ferritic/martensitic annealed 680 200 50-90 20 Aluminium 810 240 40-80 21 casting alloys martensitic 610 180 40-80 22 880 260 40-80 23 Copper austenitisch quenched 180 110-160 24 Copper alloys 400 260 100-150 25 (bronze, brass) austenitic/ferritisch (duplex) 1050 160 80-130 26 Non metallic 250 70-120 27 materials perlitic/ferritic 130 90-150 28 230 80-140 29 Heat treatable perlitic (martensitic) 60 -1000 30 alloys 100 -800 31 ferritic 75 -1000 32 Titanium alloys 90 -800 33 perlitic 130 -600 34 110 70-120 35 ferritisch 90 70-120 36 100 70-120 37 perlitic -200 200 -200 not heat treatable 230 30-50 250 30-50 aushrtbar/ausgehrtet 350 20-40 320 20-40 12% Si not heat treatable Machined alloys, Pb >1% CuZn, CuSnZn Cu, lead free Copper/electrolyte copper Duroplastic Reinforced materials Fe-based annealed heat treated Ni- or Co-based annealed heat treated cast Pure titanium Alpha-beta alloys 323 [email protected] www.guhring-tools.ru

guhring-tools.ru


Смотрите также