Toolholder Boring
Analysis of Milling on a Grinding Machine
When the word “multitasking” is applied to machine tools, the term generally refers to a machine that is capable of both turning and milling. That definition is fine as far as it goes. However, turning and milling are two fairly similar operations. They both use a cutting edge to make a chip, and they both occur at roughly the same stage in a production process. If the argument for multitasking has to do with reducing both the delay and the potential for error that come from transporting parts between different machines, then that argument gains strength if the multitasking machine can combine operations that are even further removed from one another in the production process.
For example, what about combining milling and grinding?
Grinding, of course, is typically thought of as a finishing operation. Milling is more about removing a stock envelope. In many plants, these two operations are performed in different locations. In an even larger number of plants, they are performed by different employees who have different skills. Combining the two operations would not seem to be an obvious choice.
However, certain profile grinding machines have developed in the direction of this type of multitasking, even when combining operations was not necessarily the goal. The MFP-TC grinding machine pictured, from Magerle (represented in the United States by United Grinding Technologies, Miamisburg, Ohio), provides an example. To support an increasing role for creep-feed grinding (a higher-metal-removal rate process than grinding just for finish), this machine features a powerful spindle and stiff hydrostatic ways. Further, because wheel types such as conventional abrasive, plated CBN and vitrified CBN all excel in different applications, the machine has been equipped with the capability to store different wheels and automatically switch between them.
This latter feature relies on proven technology. Specifically, it relies on a toolchange arm like that of a machining center, along with toolholders (or wheelholders in this case) that use the HSK interface of a machining center’s toolholders. Taken together, this machine’s tool changing, spindle power and rigidity produce the equivalent of a highly capable machining center. Precise heavy milling can be performed on this machine, and milling and drilling tools can be stored in the tool magazine alongside the grinding wheels.
Minimal Milling
Chris Stine is a vice president of United Grinding Technologies. He says performing chip-making operations such as milling and drilling on a grinding machine is best suited to certain types of parts. It also requires a particular mindset about production.
For a part to benefit from milling or drilling on a grinder, the cycle should consist of mostly grinding. The MFP-TC machine cited above remains a grinder first and foremost, offering precision beyond what might be associated with even a higher-end machining center, he says. As a result, the machine can’t compete economically against a machining center if traditional metalcutting makes up most of the work.
However, many ground parts do feature a small but critical amount of this metalcutting. Even on a grinding machine equipped with multiple wheels and capable of high metal removal rates, there are plenty of features that simply cannot be ground. Holes, pockets and slots that don’t run completely through the workpiece are examples. When the part has one or more features such as these, performing these cuts on the grinder can save considerable cost by eliminating the need to set up on multiple machines. This is particularly true for parts such as airfoils, in which the location of machined features may be defined with respect to ground surfaces that have complex geometries.
Another argument for consolidating operations relates to the part’s size. Large parts magnify the savings in floor space that might result from combining grinding and machining center operations into one machine. Labor savings might also be more significant. The bigger the part, the better it is to set it up in just one place.
For particularly large parts,such as jaw crusher,grinding mill,stone crusher,milling machine,rock crusher,crusher etc. Mr. Stine says that the range of potential operations expands to include turning. A rotary table that can turn at 70 rpm can deliver 1,500 sfm of cutting speed to a turning tool that cuts at a diameter of 7 feet. This is exactly the solution that GE Gas Turbines (Greenville, South Carolina) adopted for machining large turbine wheels. Parts that used to be machined on a grinder, a vertical lathe and a boring mill now receive all of this machining on one Magerle machine tool. The change saves about 6 hours of setup time and 2 days of queue time, according to engineers at the plant. Overall, there has been a 30 percent cycle time reduction.
Process Perspective
These savings overcome the fact that the multitasking grinder is unlikely to be cost-efficient when it comes to milling or turning as isolated operations. Accepting this seeming inefficiency within the machining cycle, for the sake of a more efficient process overall, is part of the recipe for implementing these machines effectively.
Different manufacturing organizations view their costs differently, and the need for this process-wide outlook is part of why identifying the right applications for these machines is not necessarily cut and dried.
A traditional manufacturing mindset looks at a part’s features and tolerances to see the particular machine tools best suited to produce all of that geometry. This part-centered perspective may optimize machining time and machining cost, but it may do so at the expense of less easily quantifiable costs related to handling the part.
Mr. Stine says a different mindset focuses on a particular unit cost. The part has to be produced to meet a certain price, after all of the costs both on and off the machine tool have been factored in. In this view, the efficiency with which each feature is machined is less significant as long as the overall process is as efficient as it can be. This latter view, he says, is the one that is more likely to realize the value of consolidating the work of various diverse machine tools into one.
Turning On A Grinding Machine
“Hard turning” usually refers to the turning of workpieces that have Rockwell C hardness values in the range of 50 or 60. It typically involves a rigid lathe and a hard cutting tool material such as PCBN. The S242 machine from Studer (represented by United Grinding Technologies) is the latest machine from this company able to perform OD grinding and hard turning within a single cycle.
John Richard, senior sales manager for Studer, explains why the two processes are complementary. If the tolerance is tight enough, he says, then turning will not do. A turning insert’s dimensions slowly change while the insert cuts, affecting machining accuracy and finish. A grinding wheel is continually reconditioned while it machines, but this is not the case with a turning insert.
On the other hand, the turning insert can deliver a performance advantage that a grinding wheel can’t. If heat treating introduces variations in the geometry of a rotating part, then a grinding wheel is going to begin by finding the high spot of the workpiece every time. The grinding cycle will vary. By contrast, a turning insert can withstand a slightly varying depth of cut for the sake of beginning the machining at the same diameter every time, to make the machining time consistent from piece to piece.
About the Author
David ZHENG is the CEO of http://www.grinding-mill.com . A company specialized in selling all kinds of engineering machines such as jaw crusher,grinding mill,stone crusher,milling machine,rock crusher,crusher etc.
Techniks Toolholders, Collets, Boring Tools CNC Tooling
|
|
LOT OF 3 CNC BORING MILL TOOL HOLDER WHISTLE NOTCH HSK CLEANING TOOLS $4.99 |
|
|
CAT 50 TOOL HOLDER INDEXABLE BORING HEAD BORE CAT50 CT $750.00 |
|
|
Erickson Tool Co. Machinist Taper Quick Change Tool Holder, Milling Boring $35.00 |
|
|
Boring Milling Machinist Taper Tool Holder 9001 $39.99 |
|
|
LATHE INDEX DO ALL TOOL HOLDER +5 TOOL HOLDERS 1 MORSE TAPER BORING BAR PLUS $479.00 |
|
|
VDI toolholder boring bar external & internal # E220250 $144.95 |
|
|
GLOBAL CNC VDI 50 FORM E2 2-1/2″ BORING BAR TOOL HOLDER $199.99 |
|
|
Aloris DA-41D Quick Change Tool Holder Boring Bar Holder DA41D $112.00 |
|
|
SOLID CARBIDE 5/16″ WCMT BORING TOOL HOLDER CARBIDE INSERTS A819 $99.99 |
|
|
Sandvik C5 PCLNL 22110-12 Boring Bar Lathe Tool Holder Capto T-MAX P 228SO $99.99 |
|
|
VDI 50 2.0″ Boring Tool Holder $125.00 |
|
|
LATHE BORING BAR TOOL HOLDER for 7/8 BORING BARS INV=1515 $9.40 |
|
|
BORING TOOL HOLDER $40.00 |
|
|
CAT 50 TAPER BORING HEAD mill tool holder cnc milling KENNAMETAL KM32-FBHS-24-90 $399.00 |
|
|
CAT 50 TAPER BORING HEAD mill tool holder milling KENNAMETAL KM40-FBHS-40-90 $399.00 |
|
|
CAT 50 TAPER BORING HEAD mill tool holder milling KENNAMETAL BMC 8608 $299.00 |
|
|
CAT 50 TAPER ERICKSON TENTHSET BORING HEAD mill tool holder KENNAMETAL SHANK $399.00 |
|
|
MICRO100 3/4″ 4PC TOOLHOLDER & BORING SET w/14 INSERTS #40-7150 NEW $440.75 $99.50 |
|
|
Lathe Boring Bar Tool Holder + Boring Bar $199.00 |
|
|
4 MORSE TAPER SHANK – BORING BAR or COUNTERBORE mill drill tool holder $24.00 |
|
|
SUBURAN BORING 40 TAPER TOOL HOLDER 3/4″ MACHINE TOOLING (BIN88) $19.99 |
|
|
5 taper= tool holder=1 inch chuck= boring mill $138.00 |
|
|
AXA 100 Quick change tool holder with 3/8 inch x 6″ boring bar & threading bit $29.00 |
|
|
BXA 200 Quick change tool holder with 6 inch x 3/8″ boring bar & threading bit $29.00 |
|
|
Master Bar for Boring and Turning and Facing Tool Holder . $100.00 |
|
|
VDI 40 25mm Boring Tool Holder $60.00 |
|
|
MOORE TOOLS 1/2″ JIG BORE TOOL HOLDER $23.00 |
|
|
100AXA QUICK CHANGE LATHE TOOL HOLDER 250-104 HD BORING $24.99 |
|
|
400 CA QUICK CHANGE LATHE TOOL HOLDER 250-404 HD BORING $34.99 |
|
|
Criterion DBL-203D Boring Head with R-8 Tool Holder Including Boring Bars $420.00 |
|
|
SANDVIK Coromant 8″ Boring Bar CTLHOL-08123 LOM Toolholder *NICE USED COND $29.99 |
|
|
Komet Micro-Adjustable Boring Head – M03 00515 w/ toolholder – AC25 $189.98 |
|
|
Komet Micro-Adjustable Boring Head – M03 00515 w/ toolholder – AC26 $219.98 |
|
|
Komet Micro-Adjustable Boring Head – M03 01025 w/ toolholder – AC27 $189.98 |
|
|
Komet Micro-Adjustable Boring Head – M03 01025 w/ toolholder – AC28 $189.98 |
|
|
Starflex 261 00 320 Micro boring Head w/ toolholder – AC29 $189.98 |
|
|
Komet Micro-Adjustable Boring Head – M03 01025 w/ toolholder – AC30 $219.98 |
|
|
ENGINE LATHE or MILL 1″ x 15 1/2″ BORING BAR 3/8″ HSS BITS metal tool holder $5.50 |
|
|
ENGINE LATHE or MILL 1 1/8″ x 16″ BORING BAR 3/8″ HSS BITS metal tool holder $1.05 |
|
|
ENGINE LATHE or MILL 1 3/8″ x 18 1/4″ BORING BAR 1/2″ HSS BITS metal tool holder $1.30 |
|
|
ALORIS CA-SERIES QUICK CHANGE BORING BAR TOOL HOLDER – CA 41 $4.50 |
|
|
5 MORSE SHANK – NMTB 40 TAPER FLASHCHANGE TOOL HOLDER MASTER mill boring DEVLIEG $229.00 |
|
|
KOROLOY 3/8″ SOLID CARBIDE “CPMT” BORING TOOL HOLDER CARBIDE INSERTS A836 $99.00 |
|
|
UNIVERSAL ENG. 300KS TOOL HOLDER W/ BORING HEAD,COLLETS $219.95 |
|
|
ETM CAT 50 TOOL HOLDER 5.0″ LONG NOSE ID BORE 210″ $10,000.00 |
|
|
ISCAR MCLNL-BS-20-4 BORING BAR TOOLING TOOL HOLDER TOOLHOLDER – NEW $50.00 |
|
|
Miling, Boring, Or Drill Press 5/16″ Toolholder $35.99 |
|
|
MICRO100 3/4″ 4PC TOOLHOLDER & BORING SET w/14 INSERTS #40-7150 NEW $440.75 $114.99 |
|
|
QCTP 250-402 Quick Change Boring Turning Facing Tool Holder No. 2, 400 CA {CC4} $59.00 |
|
|
3/4″ SOLID CARBIDE CCMT BORING TOOL HOLDER CARBIDE INSERTS A888 $175.99 |
|
|
5/8″ SOLID CARBIDE TPG BORING TOOL HOLDER CARBIDE INSERTS A886 $155.99 |
|
|
BOYAR SCHULTZ 1/2″ ID 00DRH-L BORING TOOL HOLDER #7986 $40.00 |
|
|
Williams 080 Agrippa Boring Bit Lathe Tool Holder Cutter Bit Vintage Machinist $57.00 |
|
|
ADAPTIVE TECHNOLOGIES AT-98245-03A BORING TOOLHOLDER $99.00 |
|
|
NMTB 40 TAPER BORING HEAD bar mill tool holder DEVLIEG MICROBORE USA 40M-552T $59.00 |
|
|
NMTB 40 TAPER BORING HEAD bar mill tool holder DEVLIEG MICROBORE USA 40M-5 $59.00 |
|
|
NMTB 40 TAPER – BORING HEAD ARBOR milling tool holder DEVLIEG FLASHCHANGE $49.00 |
|
|
Kennametal 1005660R00 Toolholder With Boring Head $75.00 |
|
|
TMX-PAFANA BORING TOOL HOLDER CARBIDE INSERTS X754 $129.99 |
|
|
CAT 50 4″ BORING HEAD ADAPTER TOOL HOLDER CAT50 $183.95 |
|
|
Boyar Schultz OBT Boring Tool Holder $100.00 |
|
|
EVEREDE BORING BAR TOOLHOLDER NO. 2 WITH TWO BORING BARS /CARBIDE BITS $24.95 |
|
|
South Bend Boring Bar & Cutoff Tool Holder Combo 16″ Lathe Cross Slide Mount $9.99 |
|
|
TAPER BORING HEAD ARBOR mill tool holder twin bore MADISON $39.99 |
|
|
SANDVIK A.C.T.S. #A-5802 BORING TOOL HOLDER NEWLOT 4670363 X028000X 946291287N $79.00 |
|
|
Mazak Quick Slant Lathe Boring Bar Tool Holder #15811 $195.00 |
|
|
Brown & Sharpe Boring Tool Holder #111-220 $40.00 |
|
|
MICRO100 5/16″ 4PC TOOLHOLDER & BORING SET w/4 INSERTS #40-7200 NEW $202.00 $69.99 |
|
|
CITIZEN M20 AND OTHER MODELS ETC BORING TOOLHOLDER $999.99 |
|
|
NTM STUBBY C06-STFCL-2 Boring Bar 5″OAL .375 Toolholder $73.50 |
|
|
CITIZEN M20 AND OTHER MODELS ETC GANG BORING TOOLHOLDER $999.99 |
|
|
CITIZEN E25 AND OTHER MODELS ETC BORING TOOLHOLDER $599.99 |
|
|
DOVE TAIL MACHINE TOOL HOLDER FOR BORING BAR 1.1225 ID $40.00 |
|
|
METRIC NMTB 40 TAPER BORING BAR mill tool holder milling GEWEFA 3022-063-040 $69.00 |
|
|
METRIC NMTB 40 TAPER BORING BAR horizontal mill tool holder GEWEFA 3022-063-040 $69.00 |
|
|
METRIC NMTB 40 TAPER BORING BAR horizontal mill tool holder GEWEFA 3012-063-040 $69.00 |
|
|
METRIC NMTB 40 TAPER BORING BAR horizontal mill tool holder GEWEFA 3022-050-040 $69.00 |
|
|
METRIC NMTB 40 TAPER BORING BAR horizontal mill tool holder GEWEFA 3022-032-040 $59.00 |
|
|
METRIC NMTB 40 TAPER BORING BAR horizontal mill tool holder GEWEFA 3022-025-040 $59.00 |
|
|
5 MORSE TAPER ECLIPSE QUICK CHANGE TOOL HOLDER MASTER arbor mill boring $59.00 |
|
|
MICRO100 3/4″ 4PC TOOLHOLDER & BORING SET w/14 INSERTS #40-7150 NEW $440.75 $120.00 |
|
|
BORING BAR SLEEVE TOOL HOLDER LATHE TURNING TOOL POST TOOL POST HOLDER CNC $30.00 |
|
|
OK TOOL CO PLANER METAL SHAPER BORING MILL TOOL HOLDER $199.00 |
|
|
OK TOOL CO PLANER METAL SHAPER BORING MILL TOOL HOLDER $199.00 |
|
|
APEX TOOL PLANER METAL SHAPER BORING MILL TOOL HOLDER $199.00 |
|
|
OK TOOL CO PLANER METAL SHAPER BORING MILL TOOL HOLDER $199.00 |
|
|
CAT40 BORING TOOL HOLDER W/3″ BORING HEAD A894 $99.99 |
|
|
DEAL! 250-304 QUICK CHANGE 1″ BORING BAR TOOL HOLDER $39.99 |
|
|
QUICK CHANGE LATHE LG BORE TOOL HOLDER FITS ALORIS CA $44.00 |
|
|
1/2″ Hole x 2″ Shank size End Mill Adapter Boring Tool Holder Putnam Made USA $12.95 |
|
|
Sandvik Boring Bar Tool Holder R429.90-20-040-09-AC New $180.00 |
|
|
Vintage Indexable Boring Tool Holder Cutter Bit Machinist Tooling. No Markings $50.00 |
|
|
CAT 50 Tool Holder with Boring/Drill Ext. & Head $250.00 |
|
|
Cat 50 Tool Holder w/Boring/Drill Ext. & Head $250.00 |
|
|
QUICK CHANGE TOOL HOLDER – TURN/BORE, LATHE, MACHINIST $15.95 |
|
|
Warner Swasey M-6712 BORING BAR SLEEVE Tool Holder OD 2.5″ ID 1.5″ $42.00 |
|
|
SANDVIK VDI 50 FORM E2 2″ BORING BAR TOOL HOLDER $124.99 |
|
|
QUICK CHANGE LATHE BORING #4 TOOL HOLDER FITS ALORIS BXA $22.00 |
|
|
QUICK CHANGE BORING TOOL HOLDER #4 FITS ALORIS CXA $32.00 |
|
|
QUICK CHANGE LATHE BORING TOOL HOLDER #4 400 SERIES CA SIZE $40.00 |
|
|
Toolholder $5.49 Pricing subject to change. Toolholder |
|
|
Boring $10 Boring – The Pierces |
|
|
BOTT Lock-On Toolholder Sets (14010041) $65.8 All-in-one BOTT Lock-On Toolholder Sets are made of industrial-grade, zinc-plated heavy steel. All-in-one kits. Industrial-grade, zinc-plated heavy steel accessories securely install onto panels with locking tabswill not come out when tools are removed. Hook ends are protected with plastic caps. Sets include locking tabs and installation wrench. Appropriate for lean manufacturing. NOTE: Toolholder sets shown on toolboard, toolboard sold separately. |
|
|
BOTT Lock-On Toolholder Sets (14030105) $96.6 All-in-one BOTT Lock-On Toolholder Sets are made of industrial-grade, zinc-plated heavy steel. All-in-one kits. Industrial-grade, zinc-plated heavy steel accessories securely install onto panels with locking tabswill not come out when tools are removed. Hook ends are protected with plastic caps. Sets include locking tabs and installation wrench. Appropriate for lean manufacturing. NOTE: Toolholder sets shown on toolboard, toolboard sold separately. |
|
|
BOTT Lock-On Toolholder Sets (14030106) $167 All-in-one BOTT Lock-On Toolholder Sets are made of industrial-grade, zinc-plated heavy steel. All-in-one kits. Industrial-grade, zinc-plated heavy steel accessories securely install onto panels with locking tabswill not come out when tools are removed. Hook ends are protected with plastic caps. Sets include locking tabs and installation wrench. Appropriate for lean manufacturing. NOTE: Toolholder sets shown on toolboard, toolboard sold separately. |
|
|
Boring Cat $10 Boring Cat |
|
|
Romance Is Boring $23.99 Romance Is Boring |
|
|
Boring To Bravo $8.89 Boring To Bravo |
|
|
Annoy The Boring $1.49 Annoy The Boring Vinyl Sticker Annoy The Boring |
|
|
Politics Are Boring $1.49 Politics Are Boring Vinyl Sticker politics are boring |
|
|
Boring Boring Boring Boring Boring Boring Boring by Plague, Zach Edition ILL, 0 $22.49 A mysterious gray book drives Ollister and Adelaide’s twisted po-mo relationship. When it goes missing, they go nuts: he plots revenge against art patriarch The Platypus while she obsesses over their anti-love affair. Meanwhile, the other art school scenesters experiment with bad drugs, bad sex, and bad ideas. When a punk named Punk shows up with a potent sex drug, the whole wild crowd gets caught up in the gravitational pull of The Platypus’ sinister White Ball, where a confused art terrorism cell threatens a ludicrous and hilarious implosion. With an unerring, unflinching eye for satire, Zach Plague’s brilliant hybrid of image and text lampoons the art world and those boring enough to fall into its traps. Featuring dynamic graphic text on every page, boring boring boring boring boring boring boring is an intrigue of mundane proportion. |
|
|
Hu45 – 18 inch Hold Up (Toolholder) $38.92 [UNG HU45] UNSPC: 27112809 1.78 LB 0.56 Cubes |
|
|
Hu90 – 36 inch Hold Up (Toolholder) $57.32 [UNG HU90] UNSPC: 27112809 3.59 LB 1.1 Cubes |
|
|
Boring Cat 1 $10 Boring Cat 1 |
|
|
Boring Cat 2 $10 Boring Cat 2 |
|
|
Boring Machine Auger Bits $35.57 Boring Machine Auger Bits |
|
|
Flat Boring Bits $4.68 Flat Boring Bits |
|
|
Wood Boring Bits $59.62 Wood Boring Bits |
|
|
Cylindrical Lock Boring Jigs $383.85 Cylindrical Lock Boring Jigs |
|
|
Wood boring Bit Extensions $6.59 Wood boring Bit Extensions |