M73100 horizontal spindle surface grinder with rotary table

1.     Introduction

The M73100 horizontal spindle rotary table surface grinder is a surface grinder that uses a grinding wheel to grind surfaces. It is used to process surfaces with high parallelism and roughness requirements for two parallel surfaces. Because the worktable can rotate about a horizontal axis (±3°), it can also grind internal and external conical surfaces.

The hydraulic system uses a stroke control operation box, and the reversing accuracy of the worktable movement is high, which can grind disc-shaped parts with a convex platform. The feeding system of this machine tool has automatic mechanisms such as automatic grinding head feeding, zero position stopping, sparkless grinding, automatic return to the left end limit position of the worktable, and automatic demagnetization. Operators can pre-select parameters according to their needs to reduce labor. The electromagnetic worktable magnetic force is adjustable to adapt to different processing requirements. 

This machine tool has a variable speed mechanism, so it can achieve higher production efficiency and consistent surface grinding smoothness. The grinding wheel protective cover is safe and reliable, and the grinding wheel replacement is convenient and quick. The machine tool protective cover and grinding wheel protective cover strictly follow the national standards GB1576-1995 "General Technical Conditions for Safety Protection of Metal Cutting Machine Tools" and the departmental standard "Safety Technical Requirements for Grinding Wheel Protective Covers" to ensure the safe operation of the machine tool.

The machine tool is suitable for production workshops and tool and machinery repair workshops of tool factories, bearing factories, automobile tractor manufacturing factories, air compressor factories, and general machinery factories, and can process disc-shaped tools, friction plates, bearing rings, piston rings, etc.

2. Specification

(1) Electromagnetic worktable diameter: Φ1000mm

(2) Maximum height of workpiece: 420mm

(3) Maximum longitudinal travel of saddle: 570mm

(4) Longitudinal travel speed of saddle (hydraulic stepless): 0.12m/min

(5) Electromagnetic worktable speed (electrical stepless): 848 rpm

(6) Maximum tilting angle of worktable: ±3°; ±5° (special order)

(7) Grinding wheel dimensions (outer diameter x width x inner diameter): φ500 x 50 x φ203mm

(8) Spindle speed: 1450 rpm

(9) Distance from spindle center line to worktable surface: max 635mm / min 215mm

(10) Maximum vertical travel of grinding head: 520mm

(11) Vertical feed per revolution of feed handwheel: 0.2mm

(12) Minimum scale value of feed handwheel scale: 0.005mm

(13) Minimum feed of vertical feed mechanism: 0.0025mm

(14) Automatic vertical feed of grinding head (hydraulic 12 levels): 0.00250.0300mm

(0.0025mm increase per level)

(15) Rapid up and down speed of grinding head: 210mm/min

(16) Vertical feed of grinding wheel dresser rod: 0.01mm/time

(17) Grinding wheel dressing speed (electrical infinite): 35420mm/min

(18) Motor power and speed:

① Grinding head motor: 15kW, 1450rpm

② Worktable rotation motor: 5.5kW (AC), 1500rpm

③ Worktable carriage movement oil pump motor: 1.1kW, 2800rpm

④ Grinding head rapid up and down motor: 0.55kW, 1450rpm

⑤ Grinding wheel dresser driving motor: KC50-12 DC motor

⑥ Cooling water pump motor: Three-phase AB-50 pump

⑦ Dust collection device motor: 1.1kW, 2810rpm

(19) Carriage oil pump flow rate and pressure screw pump: (3G25×4-3B) Q=20L/min P=25kg/cm2

(20) Surface flatness of test piece: 1000:0.010mm

(21) Surface roughness of test piece: Ra≤0.63μm

(22) Machine dimensions (length x width x height): 2800 x 1750 x 2400mm

(23) Machine weight: about 10000kg

MG73100 High Precision Horizontal Spindle Surface Grinder with Rotary Table

 1.     Introduction

The MG73100 high precision horizontal spindle rotary table surface grinder is a flat grinder that uses the grinding wheel peripheral to grind surfaces of two planes that require high parallelism and surface roughness. The flatness of the workpiece can reach 0.005mm and the surface roughness Ra value is no more than 0.08um. The worktable can also rotate around the horizontal axis (±3°), allowing for the grinding of internal and external tapered surfaces. The hydraulic system uses a travel control operation box, and the reversing accuracy of the worktable movement is high, making it suitable for grinding parts with convex features. 

The machine has automatic mechanisms such as automatic grinding wheel feeding, zero position stop, spark-free grinding, automatic return to left limit position, and automatic demagnetization. The operator can pre-select parameters according to their needs to reduce labor. The electromagnetic worktable's magnetic force is adjustable to adapt to different processing requirements. 

This machine is suitable for tool factories, bearing factories, automobile and tractor manufacturing plants, air compressor plants, general machinery factories, production workshops, and tool and machine repair workshops. It can be used to process disc-shaped tools, friction plates, bearing rings, piston rings, etc. This machine has a variable speed mechanism, which can achieve high production efficiency and consistent surface roughness of the grinding.

2.     Main Specifications 

(1)    Electromagnetic worktable diameter: Φ1000mm

(2)    Maximum grinding height of workpiece: 350mm (can be increased to 450mm)

(3)    Maximum longitudinal travel of the carriage: 570mm

(4)    Longitudinal movement speed of the carriage (hydraulic stepless): 0.1-2 m/min

(5)    Electromagnetic worktable speed (electric stepless): 8-48 rpm

(6)    Maximum title angle of the worktable: ±3° 

(7)    Grinding wheel size (outer diameter × width × inner diameter): φ500 × 50 × φ203 mm (for grinding wheels with speeds of over 40 m/s)

(8)    Spindle speed: 1450 rpm

(9)    Distance from the spindle centerline to the worktable surface: 160-570mm

(10) Maximum vertical travel of the grinding head: 410mm

(11) Vertical feeding per revolution of the handwheel: 0.2mm

(12) Minimum scale value of the handwheel dial: 0.005mm

(13) Minimum vertical feeding mechanism: 0.0025mm

(14) Maximum automatic vertical feeding of the wheelhead (hydraulic 12 levels): 0.0025-0.0300mm, increasing by 0.0025mm per level

(15) Wheel head fast lifting speed: 210mm/min

(16) Vertical feeding of the grinding wheel dresser rod: 0.01mm/time

(17) Grinding wheel dressing speed (electric stepless): 35-420 mm/min

(18) Motor power and speed:

a. wheelhead motor: 15 kW, 1450 rpm

b. Worktable rotation motor: 5.5 kW (AC), 1500 rpm

c. Worktable carriage movement oil pump motor: 1.1 kW, 2800 rpm

d. wheelhead fast lifting motor: 0.55 kW, 1450 rpm

e. Grinding wheel dresser driving motor: KC50-12 DC

f. Cooling water pump motor: three-phase pump AB-50

g. Dust collection device motor: 1.1kW, 2810rpm

h. Motor for hydrostatic bearing oil tank: 0.55Kw, 1450r/min

(19) Flow rate and pressure of the screw pump for driving the worktable and carriage: (3G 25×4-3B) Q=20 L/min, P=25 kg/cm2.

(20)Overall dimensions of the machine (Lx W x H): 2800 x 1750 x 2540 mm.

(21) Machine weight: About 10500 kg.

  MGK73100   High-precision CNC horizontal spindle surface grinder with rotary table 

I. Introduction

The MGK73100 high-precision CNC horizontal spindle rotary table surface grinder is a precision machining equipment that uses the periphery of a grinding wheel to grind metal materials. It can process workpiece planes with a diameter less than or equal to φ1000mm, with high flatness and surface roughness requirements. With the use of CNC axis linkage, it can grind inner and outer conical surfaces.

The overall design of the machine tool adopts a drag plate moving layout, with the worktable rotating and the drag plate moving longitudinally with the worktable. The grinding head moves up and down vertically on the column. 

(1) The cross-sectional shape of the machine tool bed is a closed hollow rectangular section with a reasonable arrangement of rib plates. The direction of the main bending deformation of the column is designed as a double-walled frame structure, ensuring good anti-deformation ability of the machine tool. The main castings of the machine tool are subjected to two artificial aging treatments to eliminate internal stress and make the machine tool more stable in accuracy.

(2) The X-axis guide rail of the machine tool adopts a linear guide rail, which has good rigidity, accuracy, and anti-vibration performance. The Y-axis guide rail adopts a steel-embedded rolling guide rail, which has a large cross-sectional area and stronger rigidity. The combination of these two guide rails ensures the speed of the drag plate movement and the accuracy of the X and Y-axis feeds.

(3) The circular worktable adopts the 9 series high-precision bearing to avoid the influence of hydraulic floating on the vertical feed zero position. This bearing is a special product jointly developed by our company and bearing manufacturers. The worktable rotation is stepless variable frequency speed regulation, to meet the requirements of various grinding speeds.

(4) The grinding wheel spindle adopts a dynamic and static pressure spindle, with axial movement and radial runout both less than 0.003mm. It has high precision and strong rigidity, and can maintain long-term service life. The oil tank is equipped with a refrigeration device to control the working temperature rise of the grinding head.

(5) The two coordinate axes of the worktable longitudinal movement (X-axis) and the vertical movement of the grinding head (Y-axis) are both driven by AC servo motors and ball screw drives, and equipped with linear grating rulers to form a closed-loop system, with sensitive feed and reliable positioning.

(6) The machine tool adopts Siemens 828D CNC system, with automatic fault diagnosis and display function, including monitoring, detection, alarm, fault content of the electrical system, etc. It is equipped with a color display (≥10.4" color graphic display) and an electronic handheld unit (including a handwheel).

(7) The machine tool electrical cabinet is equipped with an air conditioning refrigeration system.

(8) The cooling water tank is equipped with a magnetic separator and paper tape filtration.

(9) Electromagnetic suction cups are used, and the magnetic force is adjustable with demagnetization protection function.

(10) The lubrication of the guide rail and screw adopts a centralized automatic lubrication system, ensuring smooth operation of the guide rail and screw.

2. Machine Specifications

(1)    Worktable surface size…………………………………………φ1000 mm

(2)    Maximum grinding height of workpiece ………………………………400 mm

(3)    Maximum longitudinal travel of carriage…………………………………600mm

(4)    Worktable speed (electrical stepless speed regulation) ………………5～60 r/min

(5)    Grinding wheel size (outer diameter × width × inner diameter)………φ500×50×φ203 mm

(6)    Spindle speed…………………………………………………1400 r/min

(7)    Distance from spindle centerline to worktable surface…………170mm～570 mm

(8)    Vertical travel of wheelhead……………………………………………400 mm

(9)    Longitudinal movement speed of carriage (X-axis, stepless speed regulation)………0.1～2.0m/min

(10) Vertical movement speed of wheelhead (Y-axis, stepless speed regulation)………………500mm/min

(11) wheelhead vertical feed resolution……………………………………0.001mm

(12) Total power of machine………………………………around 33KW

(13) Total weight of machine……………………………around 14.8T

(14) Overall dimensions of the machine……………………4000X1750X2800mm

MM73100 Precision Horizontal Spindle Surface Grinder with Rotary Table

1. Instruction

The MM73100 precision horizontal spindle rotary table surface grinder is a flat grinder that uses the periphery of a grinding wheel for grinding. It is used to process flat surfaces with high parallelism and roughness requirements. The worktable can also rotate around a horizontal axis (±3°), allowing it to grind inner and outer tapered surfaces.

The hydraulic system uses a stroke control operation box, and the worktable has high reversing accuracy, making it possible to grind disc-shaped parts with convex platforms.

The feeding system of this machine tool has automatic grinding wheel feeding, zero position stopping, spark-free grinding, automatic return of the worktable to the left end limit position, and automatic demagnetization mechanisms. Operators can pre-select parameters as needed to reduce labor intensity. The electromagnetic worktable magnetism is adjustable to meet different processing requirements.

This machine tool is suitable for production workshops and tool and machine repair workshops in tool factories, bearing factories, automobile trailer manufacturing factories, air compressor factories, and general machinery factories. It can be used to process disc-shaped tools, friction plates, bearing rings, piston rings, and more.

This machine tool has a non-uniform speed mechanism, which enables it to achieve high production efficiency and consistent surface grinding smoothness.

The grinding wheel protective cover is safe and reliable, and the replacement of the grinding wheel is convenient and quick. The design of the machine tool protective cover and grinding wheel protective cover strictly follows the national standard GB1576-1995 "General Technical Conditions for Safety Protection of Metal Cutting Machine Tools" and the departmental standard "Safety Technical Requirements for Grinding Wheel Protective Cover of Grinding Machines," ensuring the safe operation of the machine tool.

2. Machine Specifications

(1)  Electromagnetic worktable diameter: Φ1000mm

(2)  Maximum workpiece height (new grinding wheel): 320mm

(3)  Maximum longitudinal travel of the slide: 570mm

(4)  Longitudinal travel speed of the slide(hydraulic stepless): 0.1~2m/min

(5)  Electromagnetic worktable speed (electrically stepless): 8~48rpm

(6)  Maximum tilting angle of the worktable: ±3°, ±5° (for special orders)

(7)  Grinding wheel size (outer diameter x width x inner diameter): 500x50x203mm (for high-speed grinding wheels with speeds above 40m/s)

(8)  Spindle speed: 1450rpm

(9)  Distance from the spindle centerline to the worktable surface: max.580mm, min. 160mm

(10) Maximum vertical travel of the grinding head: 420mm

(11) Vertical feeding per revolution of the handwheel: 0.2mm

(12) Minimum scale value of the handwheel dial: 0.005mm

(13) Minimum vertical feeding: 0.0025mm

(14) Automatic vertical feeding of the wheelhead (hydraulic 12-level): 0.0025~0.0300mm, increasing by 0.0025mm per level

(15) Rapid lifting speed of the grinding head: 210mm/min

(16) Vertical feeding of the grinding wheel dresser rod: 0.01mm/time

(17) Grinding wheel dressing speed (electrically stepless): 35~420mm/min

(18) Motor power and speed:

• wheelhead motor: 15kW, 1450rpm

• Worktable rotating motor: 5.5kW (DC), 1500rpm

• Worktable carriage moving oil pump motor: 1.1kW, 2800rpm

• wheelhead rapid lifting motor: 0.55kW, 1400rpm

• Grinding wheel dresser driving motor: KC50-12 DC motor

• Cooling water pump motor: three-phase pump AB-50

• Dust collector motor: 1.1kW, 2810rpm

• Hydrostatic bearing oil tank motor: 0.55kW, 1450rpm

  (19) Carriage oil pump flow rate and pressure screw pump: (3G25×4-3B), Q=20L/min, P=25kg/cm2

(20) Workpiece flatness: 1000:0.008mm

(21) Workpiece roughness: Ra≤0.32μm

(22) Machine dimensions (L x W x H): 2800x1750x2400mm

(23) Machine weight: About 10000kg