Precision Vertical Rotary Grinding Machine VRG-DX Series

Precision Vertical Rotary Grinding Machine VRG-DX Series OKAMOTO MACHINE TOOL WORKS, LTD. 2993 Gobara, Annaka, Gunma, Japan 379-0135 TEL : +81-27-388-9595 FAX : +81-27-385-1144 JQA-QMA10960 URL : www.okamoto.co.jp Annaka Factory *Prior to and while using our products you are requested to thoroughly go through the articles on danger, warning and attention for the sake of safety described in operation manual attached to the machine and also in the warning plates mounted on the machine. CAUTION *When the products fall under the eport controlled goods stipulated in “Foreign Exchange and Foreign Trade Act” , it requires the license or approval of Goverment of Japan when exporting out of Japan. *Specifications subject to change without notice. This printed matter uses environmentally friendly paper and vegetable oil inks Printed in Japan in August 2024 2024081500MTR-1

NEW MODEL Overview & User friendly, high rigidity, highly productive Line-Up Control system Original control system makes grinding easy new vertical rotary grinding machine VRG-DX Series OKAMOTO's vertical axis rotary grinding machine is simple and easy to use ! OKAMOTO original FX Controller ■ High-efficiency and high-rigidity rotary grinding machine Lineup Chuck Size ■ Grinding amount setting equipped with vertical wheel spindle. VRG6DX Equipped with an automatic grinding cycle as standard. ■ 3-point support column structure for easy adjustment. Rough and fine finish grinding plus spark-out, and retract The combination of made-in-house highly rigid column and VRG10DX functions enable mass production in a good setup. bed allows you to maintain high precision for a long oper- VRG6DX ■ Interlock function ating time. Chuck diameter 650mm The fully enclosed cover is equipped with an interlock func- ■ Okamoto original FX controller can prevent operational tion as standard. mistakes with minimum number of intuitive operations. In view of safety and the factory environment, the machin- ■ Fully enclosed cover for safety and regulatory factory re- ing cycle cannot be performed while the cover is open. quirement. ■ Vertical grinding feed and current position display Achieves a minimum vertical increment of 1 μm accuracy. ■ Ideal for grinding brittle materials such as glass/ceramics The feed amount is changed by the magnifi cation, and the as well as metals. current position is displayed on a clear LED. VRG10DX Chuck diameter 1,000mm ■ Down-feed grinding method VRG6DX Equipped with continuous mode and intermittent mode for plunge grinding. Please select the mode according to the workpieces to be ground and its application. Series Name Series Size Vertical Rotary Grinding Machine The down-feed grinding method is signifi cantly diff erent in grinding effi ciency compared to an ordinary square slide grinding machine. Infeed amount Cycle end Cycle start Rough grinding conditions （0～40μm） Intermittent infeed method Fine grinding retract function amount Fine grinding conditions (0～100μm) Sparkout (0～100min) Time Wheel spindle Infeed amount Cycle end Cycle start Rough grinding conditions (speed: set with Rotary table magnification) Fine grinding amount Continuous infeed method Fine grinding conditions (set with Retract function magnification) Sparkout (0～100min) Time Cycle start Infeed amount Rough grinding Workpiece #1 Cycle end Workpiece #2 Cycle end conditions (speed: set with magnification) Intermittent / Fine grinding amount continuous infeed method Fine grinding Retract function (coordinate correction function) conditions (set with magnification) Sparkout Correction infeed is controlled with Unreached (0～100min) Sparkout numeric values. The cycle is optimum sizing point Correction infeed (0～100min) to the mass production in consider- Workpiece of +10 μm ation with the grinding segment wear ! sizing point e.g.) unreached to 10 μm sizing point (size error by grinding segment wear, etc.) Time Infeed amount Cycle start Cycle end Rough grinding conditions (speed: set with magnification) Intermittent / continuous infeed method Fine grinding amount Option: direct sizing device Fine grinding Direct sizing device Retract function VRG6DX conditions (set with Directly controls the sizing during magnification) grinding ! Stable grinding unaffected Sparkout with the grinding segment wear is Workpiece (0～100min) sizing point realized. Time Direct sizing device 1 VRG-DX Series VRG-DX Series 2

Structure and Simple structure and operability that makes use of the features of vertical axis. features It achieves high effi ciency and high productivity. Switches are all laid on the front side of the machine to facilitate easy operation and access. Easy-to-replace wheel segments. Achieves high-precision machining of the order of 1 μm. Fully enclosed cover slide is adopted Coolant unit is laid at the back as standard in consideration of safety for easy maintenance. and the factory environment. Uses Okamoto original FX controller. Minimal intuitive operation can prevent mistakes. Grinding of brittle material workpieces such as ceramics and quartz glass with a diamond wheel is also available. VRG6DX Highly effi cient grinding is achieved with a vertical By adopting a 3-point support column axis wheel. structure, accuracy adjustment and Greatly supports the needs for productivity. surface quality adjustment are easily performed. Equipped with a rotary table foot switch as standard. Signifi cantly improved setup and operability. Rotary pattern Cross hatch pattern 3 VRG-DX Series VRG-DX Series 4

Specifi cations Characteristics Lineup of 2 types of rotary grinding machines. and The optimum series can be selected Items Unit VRG6DX VRG10DX comparison according to the grinding application! Table OD mm φ800 φ1,100 Electromagnetic chuck OD mm φ650 φ1,000 Table rotation speed rpm 1～30 1～26 Table Vertical axis & rotary table Horizontal axis & rotary table Horizontal axis & square table Distance from chuck top face to segment bottom end When protrusion amount of grinding segments is 20 mm mm 290 400 VRG series PRG series PSG series Load capacity (excl chuck) kg 250 500 VRG6DX PRG8-iQ PSG63GX Vertical stroke mm 300 400 Wheel head Maximum wheel spindle feed speed mm/min 300 Vertical feed Minimum infeed setting amount mm 0.001 Continuous infeed speed mm/min 0.06 to 2.4 (at 100% Override) Wheel diameter (segment) mm φ350 φ550 Grinding Grinding segment (Length x Thk x Width) mm 49.5×25×125 wheel Maximum number of grinding segment pcs 12 18 Grinding wheel rotation rpm 1,000/1,200 (50/60Hz) 590/710(50/60Hz) Table rotation motor horsepower kW 1.5 3.5 Motors Wheel spindle motor horsepower kW 11 37 Grinding methods Grinding methods Grinding methods Power supply - 3-phase AC200V Down feed grinding Plunge or traverse grinding Plunge or traverse grinding Power requirement kVA 20 68 Main unit Machine weight (incl load) kg 4,000 6,500 Wheel Spindle Machine dimension mm 2,065×1,691×2,692 2,732×2,025×3,354 Wheel Spindle ※Specifi cations are subjected to change without prior notice due to improvements. Wheel Spindle Table Standard accessories External view VRG6DX VRG10DX Rotary table Rotary table Length ○A 2,065 2,732 Items Width ○B 1,691 2,025 Standard grinding wheel Height ○C 2,692 3,354 Wheel fl ange (adaptor) ※ Exclude coolant unit Electromagnetic chuck, controller Fully enclosed cover LED work light Cover interlock Leveling plate C Foot switch for table jogging Necessary tools Center coolant B A Vertical axis & rotary table Horizontal axis & rotary table Horizontal axis & square table Grinding wheel work area Big General General Optional accessories Recommended workpiece materials Productivity Maximum Big Normal Glass / Quartz Items Grinding load Big Small Small Sapphire Coolant unit Surface pattern Cross hatch or rotary pattern Rotary pattern Grinding pattern SiC Mist collector Square surface grinding Generally recommend- Direct sizing device Die / Mold Round surface grinding, many numbers, large surface area High geometric tolerance items ed workpieces Signal tower Steel Items that require form grinding Custom color Hydraulic & Pneumatic Parts *Results will vary depending on the workpiece, grinding wheel used, and target value. Bearings 5 VRG-DX Series VRG-DX Series 6