LUREN Precision Co.LTD. www.luren.com.tw Head Office: Via Marconi, - PowerPoint PPT Presentation

Head Office: Li Hsing Factory Location: Hsin Chu Science Park - Taiwan LUREN Precision Co.LTD. www.luren.com.tw Head Office: Via Marconi, 8 Viganò Brianza (LC)- Italy www.fubri.it Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines LWT-2080 LWT-3080 Distributor for European market

LUREN With this presentation we want to inform about:  Basic of thread and worm grinding operation  Working condition  Description of Luren thread grinding machines The most important characteristic of Luren grinding machines are:  High performances  High tech design and components  High flexibility  Easy to use  Low cost Distributor for European market

LUREN Basic technical information about of Thread grinding operation The accuracy of the thread grinding process to a large extent is very much affected by the type of wheel and by the working condition. We examine now some aspects of this important operation. First examine the different types of thread and worms in accordance with the international normatives. Distributor for European market

LUREN The profile of the tooth of a speed reducer screws can be with four different shapes in accordance with the geometrical specification of DIN 3075 normative ZA – Type The section of this screw through the plane of its axis shows a tooth profile with rectilinear flanks on this plane. That is to say a rack with symmetrical flanks defined by the axial pressure angle. This type of screw is obtained by using tools with straight flanks in the axial section. Distributor for European market

LUREN The profile of the tooth of a speed reducer screws can be with four different shapes in accordance with the geometrical specification of DIN 3075 normative ZN – Type This type of screw is obtained using double tapered tools,, with rectilinear flanks, placed along the part’s normal section. These tools may be normal turning tool, tapered finger milling cutter or grinding wheel, double tapered, small diameter milling cutter or disc grinding wheel. In this case a rectilinear flank profile will be obtained in the normal section, but not in the axial section. Distributor for European market

LUREN The profile of the tooth of a speed reducer screws can be with four different shapes in accordance with the geometrical specification of DIN 3075 normative ZK – Type This type of screw is obtained using a large diameter double-tapered milling cutter or disc grinding wheel. Once the basic parameters of the screw are defined i.e. inside diameter, number of threads and the pressure angle, the profile will be determined by the wheel diameter. The smaller the diameter, the closer the profile will resemble that of screw N. The larger the diameter, the more curved the profile will be. Distributor for European market

LUREN The profile of the tooth of a speed reducer screws can be with four different shapes in accordance with the geometrical specification of DIN 3075 normative ZE – Type The tooth flank has a helical profile. This may be generated, for example, by a flat disc grinding wheel inclined to the pressure angle and the helix angle. It may also be generated by creating a relevant wheel profile which in turn gives a helical profile. Precision coupling demands this type of profile. Distributor for European market

LUREN Luren thread grinder can grind every type of worm Rolling dies for high production of external thread. The accuracy and the low roughness of this tool are extremely important for the quality of the thread and the life of the roller. Helix Gashes Straight Gashes Distributor for European market

LUREN Wheel profiling rollers for different type of grinding machines These rollers are manufacturing with a special steel and incorporate differentiated grooves to facilitate the abrasive discharge Distributor for European market

LUREN Luren thread grinder can grind every type of worm It ’s possible to grind special worm in accordance with the customer specification Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines Luren produces two models of thread grinding machine Mod. LWT-2080 & Mod. LWT-3080 Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines Model LWT 2080 LWT 3080 Max workpiece diameter 200 mm 300 mm Technical characteristic Min workpiece diameter 5 mm 5 mm Max module 8 mm 12 mm Min/Max N° of gashes 1/99 1/99 ± 35 ˚ ± 35 ˚ Max lead helix angle Distance between centers 80 – 800 mm 80 – 1260 mm Max grinding slide travel 430 mm 430 mm Max workpiece weight 40 Kg 60 Kg Max grinding wheel speed 6000 rpm 6000 rpm CNC FANUC 21i-MB FANUC 21i-MB Length 3000/3200 mm 4000 mm Depth 2500 mm 3500 mm Height 2300 mm 2300 mm Weight 8000 Kg 8000 Kg Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines LWT-2080/3080 B-axis N-axis A-axis /LWT-2080/3080 Y-axis (D.D.-AC Servo Motor ) Tailstock Z-axis Dressing Unit (Linear Motor ) Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines Basic axes of thread grinding machine Standard dresser use two single point diamond Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines Direct Drive Torque Motor Work-piece Spindle Low Speed High Torque -FANUC - Rated Torque : 1200 Nm 260 Nm Rated Speed : 250 rpm 300 rpm Absolute Accuracy : 15 arc-sec Repeat Accuracy : 1.3 arc-sec  No backlash, Oil Cooling Linear Motor  High reliability,  Less components,  Easy installation,  Long Life-time.  CNC Control System  FANUC Motor  MAX. Thrust 3000N Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines Full Profile Grinding Ground by Luren LWT-2080/LWT-3080 Machine Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines LWT-2080/3080 Grinding Example Grinding Data Speed : 1600 rpm Feed : 4000 mm/min Removal : 0.2 mm Once Grinding Grinding Time 38 sec. Dressing Time 20 sec. Worm Accuracy Worm Accuracy Lead Error Left Tooth Flank : 2.7µm Right Tooth Flank : 2.1µm Lead Wave Left Tooth Flank : 1.3µm Right Tooth Flank : 1.5µm Left Tooth Flank : 3.0µm (max) Right Tooth Flank : 2.2µm (max) Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines LWT-2080/3080 Big lead angle worm Module (Mn) 6.4850 26 ˚ 29' 56" R Lead angle 20 ˚ 00' 00" Pressure angle No. of start 4R Outside diameter 65 mm Base diameter 45.3051mm Length 80 mm Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines Surface Roughness Distributor for European market

LUREN CNC Worm and Thread Grinding Machines LUREN Smart Dialogue Interface Software system combines the various design and calculation programs for worm gears Smart profile modification for ZE ZK ZA ZN and curvature type worms LWT-2080/3080 Distributor for European market

LUREN CNC Worm and Thread Grinding Machines LUREN Smart Profile Modification for Worm Grinding LWT-2080/3080 Distributor for European market

LUREN CNC Worm and Thread Grinding Machines LUREN Smart Profile Modification for Worm Grinding LWT-2080/3080 Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines More example of Grinding worm with LWT-2080/3080 machines Small Module Worm Data Module 1.4975 Lead angle 2˚30' 20" Pressure angle 20º00'00" No. of start 1R Outside diameter 38 mm Length 44 mm Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines More example of Grinding worm with LWT-2080/3080 machines Big Module Worm  Lead Angle 9 ° 50' 00 "  Pressure Angle 20 ° 00' 00 "  No. of Start 2R  Effective Length 143 mm Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines More example of Grinding worm with LWT-2080/3080 machines Double lead of Worm Double Lead Module 1 2.236 Lead angle 5˚01' 44" Flute lead 7.0246 Module 2 2.184 Lead angle 4˚30' 00" Flute lead 6.8401 Pressure angle 20˚00' 00" No. of start 1R Outside diameter 32.5 mm Length 40 mm Distributor for European market

LUREN LUREN CNC Worm and Thread Grinding Machines More example of Grinding worm with LWT-2080/3080 machines Roller ground by multi-ribs Roller Roller Roller Roller Roller Distributor for European market

LUREN CNC Worm and Thread Grinding Machines LUREN More example of Grinding worm with LWT-2080/3080 machines Rolling die Distributor for European market

LUREN CNC Worm and Thread Grinding Machines LUREN More example of Grinding worm with LWT-2080/3080 machines Worm Data Type ZK Pressure Angle 20 ˚ Thread 3R Outside Diameter 200 mm Depth :17.85 mm Lead Angle 7 ˚ 29'40" Lead 76.0479 Distributor for European market

LUREN CNC Worm and Thread Grinding Machines LUREN High accuracy - good surfaces – short grinding time Distributor for European market