Crankshaft grinding machine M8260x3000
1. Main functions:
M8260x3000 crankshaft grinding machine is used to grind the journals and crankpins of crankshafts, especially for the automobile, tractor diesel engine works and their repair shops. The machine is featured with simple structure, easy operation and a wide application. (M8260X3000)曲轴磨床是一种结构简单、操作方便、适应性广的曲轴磨床，适用于汽车、拖拉机、柴油机修理厂等磨削发动机曲轴的曲柄颈与主轴颈。）
2. Main features:
The machine is controlled mainly by hand, partly by electric (headstock and tailstock in synchronization by servo motors) hydraulic control(wheel head) (机床由机械、电气、液压控制，以手动控制为主。)
Specialized chucks are offered for clamping of work piece, which can be removed and replaced with centers according to different length. The longitudinal traverse of work table can be controlled either by hand or by automatic, and the cross traverse of wheel head can be controlled either by hand or by hydraulic. (机床工件装夹配备专用卡盘，也可拆去头、尾架卡盘，用顶尖支撑。工作台纵向移动可手动也可机动。砂轮架横向移动，有手动亦有液动。)
With hydraulic system and electric linkage structure adopted on the wheel head, safety can be guaranteed when operate miss occurs during the grinding or adjusting process. A protective shield is equipped above the wheel head and a rapid driving-and-reversing mechanism is used on the wheel head, too. (砂轮架采用液压、电气连锁结构，无论在调整或磨削因操作失误都能确保安全，砂轮架有可靠的防护罩。砂轮架有快速进退机构。)
The headstock and tailstock is in synchronization by employing FAGOR CNC control system by Spain and YASKAWA servo motor by Japan, under which the work piece revolves. Timing belt pulley and anti-backlash gear guarantee an accurate transmission ratio. A separated electric cabinet is adopted. (采用西班牙发格数控系统及日本安川伺服电机控制头、尾架同步，带动工件旋转。同步带轮和消隙齿轮的传动保证了精确的传动比。机床配备独立电箱。)
The wheel spindle, framed in telescopic construction, is driven by motor rested on wheel head through belt pulleys and triangular belt. Hydrostatic bearings by domestic makers are adopted on the wheel spindle. Separated oil system and accommodation oil tank as well as air-cooled device are employed on this machine. (砂轮主轴由装于砂轮架上的电机通过皮带轮及三角带轮驱动，砂轮主轴为套筒式结构，砂轮主轴采用北航动静压轴承，并采用单独供油系统，配备专用的油箱和风冷装置。)
A set rule for work table is optical grating scale with 3000mm in length. (机床的工作台定位尺，采用3000毫米光栅尺定位。)
3．Main specifications:
最大工件回转直径： maximum swing over bed: Ф600mm
最大工件长度： maximum length of workpiece: 3000mm
中心高： centre height: 320mm
在中心架上可磨直径 diameter able to grind with steady rest:
170mm (maximum)最大
50mm (minimum)最小
顶尖距： centre distance: 3000mm
卡盘距： chuck distance: 2800mm
曲柄半径： throw of pin: 120mm
工件最大重量 maximum weight of workpiece: 600kg
主轴转速 speed of work spindle: 25-90r/min (stepless)
头架顶尖锥孔圆锥号 taper of center for headstock: metric tape 80米制
尾架顶尖锥孔圆锥号 taper of center for tailstock: metric tape 80米制
工作台： Work table
手轮一转工作台移动量 table traverse per hand wheel revolution:
5.88 (coarse)粗进给
1.68 (fine) 精进给
最大纵向移动量： maximum amount of longitudinal movement:
3000mm (manual operation)手动
3000mm (engine driven)机动
砂轮架： Grinding carriage
砂轮尺寸： wheel size:
900x65x305mm (maximum)最大
650x65x305mm (minimum)最小
砂轮架主轴转速： speed of wheel spindle:
890r/min (maximum), 740r/min (minimum)
沿丝杆最大行程： maximum traverse of grinding carriage : 185mm
快速进退量： rapid advance-and-retreat of grinding carriage: 260mm
砂轮架与上垫板间调整量 adjustment range between grinding carriage and bench hook
80mm (forward) 100mm (backward)
横进给手轮一转移动量 cross feed per hand wheel revolution: 1mm
横进给手轮一格移动量 cross feed per hand wheel division: 0.005mm
砂轮的线速度： wheel peripheral speed: 35m/s
液压系统： Hydraulic system
主油路调整压力 pressure range for mail oil way: 0.9-1.1Mpa
润滑油路调整压力 Pressure range for lubrication circuit: 0.2-0.3 Mpa
油泵流量： rate of flow of pump: 15L/min
油泵压力： pressure of oil pump: 2.5Mpa
冷却系统： coolant system
冷却泵流量： rate of flow of cooling pump : 100L/min
电动机功率： Motor powers of the machine
砂轮电动机功率： motor power of grinding wheel: 15KW
头尾架电机功率： motor power of headstock and tailstock: 2x7.5KW (SGMGH, Japan)
油泵电动机功率： motor power of oil pump: 0.55KW
冷却泵电机功率： motor power of cooling pump: 3KW
工作台电机功率： motor power of work table: 3KW
机床外形尺寸和净重：overall dimension of the machine
长X宽X高（mm） 9650x2400x1950mm (LxWxH)
净重（kg） net weight: 14000kg
工作精度：Working accuracy
圆度： roundness: 0.09mm (0.018mm in diameter)
纵截面内直径的一致性： (in longitudinal section) conformity error between crank arm journals: 0.012mm
表面粗糙度: surface roughness 0.32μm
表面波纹度：surface waviness 1.6μm