double sided lapping machine

  • High efficiency
  • Stable quality
  • Simple operation
  • High grinding quality

The double-sided lapping machine is mainly used for double-side lapping of crystals or other mechanical parts that are parallel on two sides, especially the processing of thin brittle materials. It is suitable for various materials of mechanical seal ring, ceramic wafer, cylinder piston ring, oil pump blade bearing end face, silicon, germanium, quartz crystal, graphite, sapphire, optical crystal, glass, lithium niobate, tungsten carbide, stainless steel, powder metallurgy and other metal material surface lapping and polishing.

Working principle

The working principle of the double-sided lapping machine is shown below. The workpiece to be ground is placed in the planetary gear, and there are lapping wheel on the upper and lower sides. The lapping wheel is fixed to the surfaces of the upper and lower lapping disc, and the workpiece to be processed is placed in the differential gear composed of the sun gear and ring gear. The lapping pressure is achieved by the cylinder pressurizing the upper lapping disc. In order to reduce the force applied to the workpiece during lapping, the upper and lower lapping wheel are usually rotated at equal angular velocities of opposite magnitudes. The double-sided lapping method can avoid the deformation problem caused by the bonding error of the fixture and the stress difference between the two sides of the slice workpiece.

Double Sided Lapping Machine 1

 Features of double-sided lapping machine:

  1. The machine tool is equipped with the reasonable protective cover to protect the operator and the maintainer form safety and prevent splashing and spilling of the lapping oil. The equipment structure is reasonable, compact and easy to operate. It is easy to install and repair.
  2. Diamond grinding wheel, CBN grinding wheel and conventional grinding wheel are applied according to the user’s requirements, as well as the special dressing grinding wheel is applied for dressing to ensure the precision dressing.
  3. Advanced probe type dimension measurement method, the online measurement for the workpiece.
  4. Pneumatic device controls the upper lapping disc swing in, swing out, rising and lowering movement. Apply 3 stages of pre-pressure, main pressure and post-pressure control, the pressure value can be adjusted arbitrarily and can be automatically converted.
  1. The RPM of the upper and lower lapping discs of the machine tool and the ring gear of driving planetary disc can be continuously variable and the direction can be reversed. It can adjust the pressure and keep the pressure stable. The maximum pressure can meet the requirements of lapping parts after the lapping disc is blunt and dressing lapping wheel, and there is a large margin( the upper and lower lapping wheel can be rotated arbitrarily or up stop and down rotate).
  2. Configure lapping slurry constant temperature filtration system, and the capacity, working flow, working pressure, and filtration precision can meet the requirements.
  3. The electrical control system is applied PLC control system, touch screen operation panel, full English operation interface. The operator can operate skill without programming knowledge.
  4. The outer ring gear adopts electric lifting mechanism, which is stable and reliable.
  5. The accuracy of machine tool and electrical requirements are in accordance with the product specifications, and can fully meet the processing requirements.
  6. Human-machine interaction, simple use, stable performance. Machine tool control, various control modes, numerical instruments, and alarm information are integrated into one, which is convenient for maintenance and inspection.

Double Sided Lapping Machine Technical Parameter Table

Item

2M84100A

MB43100A

MB43100C

2M8470A

2M8463A

Wheel Dimension(mm)

φ1000*350*55

superhard abrasive thickness 5mm

φ1000*450*70

φ1000*450*70

Φ700*300*55

superhard abrasive thickness 5mm

Φ700*300*55

superhard abrasive thickness 5mm

Max Workpiece Diameter * Height(mm)

330*100

275*100

275*100

180*100

160*100

Upper Power (kW)

7.5

7.5

7.5

5.5

5.5

Upper RPM(r/min)

5-80

5-80

5-80

5-80

5-80

Lower Power(kW)

7.5

7.5

7.5

5.5

5.5

Lower RPM(r/min)

5-80

5-80

5-80

5-80

5-80

Inner Gear Power(kW)

3

3

3

2

2

Inner Gear RPM(r/min)

5-75

5-50

5-50

5-60

5-60

Intake Pressure(MPa)

0.8

0.8

0.8

0.6

0.6

Dimension(mm)

2530*2070*2770

2750*2700*2400

2710*2370*2760

2140*1800*2230

2140*1800*2230

Weight(kg)

4500

6500

6300

3000

3000

Accuracy(Typical workpiece): Flatness 1μm, Parallelism 1μm, Circle of Equal Altitude 2μm, Roughness Ra0.2μm

Configuration Data Table of Double Sided Lapping Machine

Name

Specifications

Manufacturer

Quantity

Notes

PLC

FXIN-60MR-001

Japan Mitsubishi

1

Control system

VFD

FR-ET4Q-7.5-CHT

Japan Mitsubishi

1

Upper disc

VFD

FR-ET4Q-7.5-CHT

Japan Mitsubishi

1

Lower disc

VFD

FR-ET4Q-5.5-CHT 

Japan Mitsubishi

1

Center gear

Touch screen

GT1265-VNBD

Japan Mitsubishi

1

8.4 inch

Pneumatic control component

 

Japan SMC

1 set

Cylinder control value

Grinding wheel

CBN, diamond and conventional abrasive grinding wheel

Suzhou, Beijing

1 pair

Upon the roughness of the workpiece

Geared motor

7.5kw

Germany SEW/Hangzhou Jie Brand

1

Upper disc

Geared motor

7.5kw

Germany SEW/Hangzhou Jie Brand

1

Lower disc

Geared motor

      4kw

Germany SEW/Hangzhou Jie Brand

1

Center gear

Probe

LT-30

Sony

1 set

Online measurement

Probe

LT-30

Sony

1 set

Online measurement

Constant temperature cooling system

15℃-50℃

Yantai

1 set

Room temperature, adjustability

Common Problems of Double Sided Lapping Machine

Faults

Main Causes

Treatment Methods

Lapping plate does not rotate

485 communication line is badly connected or reversed

Check wiring

PLC Q0 no output

PLC is damaged or the program is wrong, replace

The main unit, the main frequency converter is damaged or the frequency conversion parameters are incorrect.

Replace damaged parts or modify parameters

Mechanical parts or drive belt failure

Deal with it upon the actual situation

Frequency converter power failure

Guarantee three-phase 380V power supply

The sun wheel does not rotate

485 communication line is badly connected or reversed

Check wiring

The auxiliary motor or auxiliary frequency converter is damaged or the frequency conversion parameters are incorrect.

Replace damaged parts or modify parameters.

Mechanical parts or drive belt failure

Deal with it upon the actual situation

Frequency converter power failure

Guarantee three-phase 380V power supply

Upper lapping plate cannot be lowered

The slow drop pressure in the manufacturer parameters is too small or the back pressure is too large

Readjust

Wire connection failure makes 10.5 or 10.6 no input

Replace switch or check wire connection

Solenoid valve YV1, YV2, YV6 are damaged

Replace the solenoid valves

Speed control button cannot work

The speed control button is broken or wiring failure

Replace

The upper lapping plate slows down too fast

The slow drop pressure in the manufacturer parameters is too large or the back pressure is too small

Readjust

When the upper lapping plate is lowered, it rises instead

The slow drop pressure in the manufacturer parameters is too small or the back pressure is too large

Readjust

No display for the display

DC24V switching power supply is a damaged or connected failure

Replace or check the wire connection

Display is damaged

Replace

The sand pump does not start

PLC 11.5 no output or sand pump start switch is broken

Replace the PLC or switch

1KA, 1KM, 1FR, sand pump are damaged

Replace

Maintenance of double-sided lapping machine

1 Regularly check the electrical circuit and replace the damaged ones. Regularly check the various parts of the equipment and tighten the loose parts.

2 Regularly add lubricating oil to the double-sided lapping machine. Try to start the machine once before work to avoid any sundries. Clean the inside of the machine after work and keep the machine clean. Record after maintenance.

3 Pay attention to clean the sundries, check whether the working position, spring burns or breaks in the maintenance.

4 Keep the inlet and outlet of the lapping slurry open, and add lubricating oil to the moving position.

5 If the motor has noise or high temperature( above 80°C), stop the machine immediately and check it. Clean the sun gear and outer ring gear once in each shift ensure that there are no sundries between the gears.

6 Ensure that the flow of water smooth. After opening the switch of the motor, if it is found that the motor does not start reacting immediately, stop the machine and check it. Regularly do maintenance work, clean the exhaust vents and holes.

7 Pay attention to the maintenance of the appearance to avoid rust. It should be painted anti-rust. When storing the equipment, cover it to prevent the dust from covering the working surface.

8 Completely put the workpieces in the fixture. Check whether there is anything sticking to the workpiece on the upper lapping wheel before lifting and lowering the upper disc.

Application scene of double-sided lapping machine:

 

Application of double sided lapping wheel

Application scene of double sided grinding machine

Application scene of double sided lapping grinding machine

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