1. Application The GHO-200 CNC Gear Hobbing Machine is designed to perform high speed, precision hobbing for automotive gear parts. The following operations according to a technological program are able to be done on the machine tool : - Spur gear - Helical gear - Small Cone gear - Crown gear - Sprocket The machine tool is provided with the following CNC axes : X-axis : column travel, Y-axis : Hob shift Z-axis : hob head A-axis: Hob head swivel C-axis: Table rotation The below figure presents the CNC axes and the directions of its motions. Page no. 4
2. Basic Technical Specifications GHO-200 2.1 TYPE - Ver. CNC GEAR HOBBING M/C 2.2 Max. work-piece diameter /kg Ø 200 2.3 Max. module - M4.5 2.4 Table diameter Ø 240 2.5 Z-axis travel(axial) 350 2.6 X-axis travel(radial) 200 2.7 Hob swivel angle deg MAX±45 2.8 Hob arbor taper - NT NO.40 2.9 Max. hob diameter/length Ø 180/190 2.10 HOB shift travel 170 2.11 Max. hob speed rpm 1500 2.12 Max. table speed rpm 230 2.13 TAIL STOCK stroke 380-780 2.14 Z-axis rapid feed rate m/min 12 2.15 X-axis rapid feed rate m/min 12 2.16 Y-axis rapid feed rate(hob shift) /sec 4.2 2.17 Travel distance from table surface to hob center(z-axis) 200-550 2.18 Travel distance from table center to hob center(x-axis) 15-215 B-axis(Hob spindle) kw AC12/16 A-axis(hob head swivel) Nm 6/10:1 Z-axis Nm 27 /2:1 X-axis Nm 27 2.19 MOTOR C-axis Nm 410 Y-axis(hob shift) Nm 6/10:1 Lubrication kw 0.2 Coolant kw 0.9 Hydraulic kw 3.7/2.2 2.20 Hob head fixation ton 7.6 2.21 Tail stock fixation ton 1.5 2.21 Work-piece fixation Ton 3.3ton(Ø 120 CYLINDER) 2.22 Number of Axes controlled by CNC - 5(X, Y, Z, A, C) 2.23 CNC CONTROL SYSTEM - SIEMENS 840D/FANUC 18iMB 2.24 Floor space(l W H) 2702 3360 2810 2.25 Machine weight kg 9,000 Page no. 5
3. Technical Description of Major Unit of Machine Tool 3.1 Hob head Material : Cast iron & Steel Hob spindle motor : 1PH7133-2ND03-0BC2(SIEMENS) 12/16kW Hob spindle bearing : B7017E. TPA. P4. UL Hob spindle gear ratio : 3:1 Hob shift clamp : Disc spring(4 position), Clamping power 7.6ton Hob swivel clamp : Disc spring(6 position), Clamping power 7.3ton 3.2 Tail stock Material : Cast iron & Steel Tail stock up/down cylinder : 35H-31FB63B400 (Clamp power at 30 bar : 840kgf) Tail stock spindle bearing : B7010E.TPA.P4.UL Tail stock clamp : Disc spring, Clamping power 1.5ton Page no. 6
3.3 Table(C-axis) Material : Cast iron & Steel Table(C-axis)Motor type : Built-in torque motor(direct-drive motor) Table spindle bearing : NNU4938K P4 Table resolution : 0.001 3.4 Bed Material : Cast iron Weight : 3,040kg X-axis Ball screw : Ø50 x 907(Maker: CBC) X-axis Ball screw bearing : 40TAC 90B DFD C10PN7A(Maker: NSK) 3.5 Column Material : Cast iron Weight : 1,850kg Z-axis Ball screw : Ø50 x 850(Maker: CBC) Z-axis Ball screw bearing : 40TAC 90B DFD C10PN7A(Maker: NSK) Page no. 7
3.6 Lubrication System Lubrication tank for slideway - Maker : Hansung - Spec : HMGP303S-01-T12-F/P-F220 Lubrication tank for spindle gear box - Maker : Hansung - Spec : HMTP-3M-200-13MAVB(400x500x250) 3.7 Hydraulic System Main Pump - Maker : NACHI - Spec : PVS-1B-22NS Sub Pump - Maker : SHIMADZU - Spec : YP10-2.5A2H2 -R Sol V/V - Maker : NACHI - Spec : SS-G01-C5-R-C1-31(1EA), SS-G01-C6-R-C1-31(2EA), SS-G01-A3X-C1(4EA) Hyd. Actuator - Hob head unclamp, Hob swivel unclamp, Hob arbor unclamp, Hob arbor support Clamp/Unclamp, Tailstock Unclamp, Tailstock up/down, Work Clamp/Unclamp Page no. 8
3.8 Hobbing jig Maker : S&T Type : Collet, Face drive, Manual, Work arbor and Special type 3.9 Hob centering unit Maker : S&T 3.10 Interactive Prograing Environments - Additional prograing is not necessary. And gear processing is easy with just the input of specifications of hob cutter, workpiece, and cutting condition 호브데이터 공작물데이터 HOB_DIA 호브외경 NO_TEETH 잇수 HOB_WEAR 호브마모량 MODULE 모듈 NO_THREAD 호브줄수 H_ANGEL 비틀림각 deg LEAD_ANGLE 호브리드각 deg P_ANGLE 압력각 deg SHIFT_TYPE 호브시프트유형 ROOT_DIA 치저경 SHIFT_VOL 호브시프트량 WORK_DIA 공작물외경 CUT_NO_SH 1 회시프트당가공횟수 EA WORK_WIDTH 공작물절삭폭 START_POS 아버게이지라인에서유효호브날시작부까지길이 CROWN 크라운량 END_POS 아버게이지라인에서유효호브날끝부까지길이 CROWN_H TAPER 크라운중심점높이테이퍼량 호브줄수, 리드각 : - (LH HOB), +(RH HOB) 호브시프트유형 : 1: (+) 방향, 2: (-) 방향, 3: (+)(-) 왕복 모듈 : +(Metric), - (Diameterical Pitch) 비틀림각 : - (LH GEAR), +(RH GEAR) 절삭조건데이터 (1) 절삭조건데이터 (2) RTP_X X 축가공시작, 종료점 1ST_RPM 1 CUT 시호브회전수 RTP_Z Z 축가공시작, 종료점 2ND_RPM 2 CUT 시호브회전수 VARI 가공방법 X_FEED X 축방향절삭이송속도 /rev APPROACH 어프로치량 Z_1ST_FEED 1 CUT 시 Z 축이송속도 /rev OVER RUN 오버런량 Z_2ND_FEED 2 CUT 시 Z 축이송속도 /rev W_LOW_POS 기계원점에서공작물밑면까지의거리 FIN_CUT UP_SOLID 2 CUT시정삭여유량가공상단점위치에서테이블 1회전한후후퇴 DOWN_SOLID 가공하단점위치에서테이블 1 회전한후후퇴 가공방법 : 1(UP CUTTING), 2(DOWN CUTTING), 3(UP-DOWN 2 CUTTING) 3(DOWN-UP 2 CUTTING), 4(UP-UP 2 CUTTING) UP_SOLID : 0( 사용안함 ), 1( 사용함 ) DOWN_SOLID : 0( 사용안함 ), 1( 사용함 ) Page no. 9