DYS Substrate Flat Lapping Machine
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Standard Double Sided Lapping Machine

Advanced Double Sided Lapping Machine

Optical Glass Lapping and PolishingAdvanced double-sided lapping and polishing series cater to high-precision industries like optical lenses, semiconductor wafers, metrology instruments, and aerospace devices. This series is uniquely equipped with a height gauge and a dual-blade Facing & Grooving System (FGS), ensuring the needs of high precision processing.

Accessible Flatness (Φ50mm) 0.002 mm
Accessible Parallelism (Φ50mm) 0.01 mm
Accessible Roughness (Aluminum) Ra. 0.001 μm
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Brief Introduction

Double Sided Lapping and Polishing Series features a pair of parallel plates that are not only able to achieve the accurate thickness, but also improve the parallelism, flatness and roughness of workpieces. The series has the ability to simultaneously process two opposite sides with twice the efficiency compared to Flat Lapping Machine. Therefore, it is suitable for workpieces with parallel surfaces.

Specifications
Key Facts
Sampling
Features
  • Double Sided Process ◉
  • Soft Start And Soft Stop
  • Orbital Workpiece Process
  • 200 KGF Downward Pressure
  • Facing & Grooving System (FGS) ◉
  • Touch Screen Interface
  • In-process Stroke Gauge

Engineering Intent

During operation, the upper and lower plates exert pressure on the workpieces from two directions while rotating independently and simultaneously. Meanwhile, the sun wheel drives the planet wheels in a circular orbit to achieve double-sided processing. Additionally, a non-contact height gauge inspects the feeding depth of upper plate for measuring the thickness of the product. To maintain parallelism between the plates, it is imperative to evenly distribute at least of three planet wheels across the lower lapping plate.

Parameters
System ModelDYB380GDYB610GDYB965G
Diameter of Upper/Lower Plates (mm)∅ 380 × ∅ 162 × 24∅ 610 × ∅ 230 × 38∅ 965 × ∅ 395 × 47
Max. Diameter of Workpiece (mm)∅ 125∅ 210∅ 300
Process Thickness (mm)0.12 ≤ t ≤ 300.12 ≤ t ≤ 300.12 ≤ t ≤ 30
Number of Planet Wheel556
Configuration of Planet WheelDP12 | Z=66 | α=20°DP12 | Z=108 | α=20°DP12 | Z=152 | α=20°
Rotation Rate of Lapping Plates (rpm)0-600-600-50
Main Motor (kW)1.53.757.5
Auxiliary Motor (kW)1.53.751.5
Upper Motor (kW)0.750.750.75
Feed Rate of FGS (mm/min) *optional10 - 12010 - 12010 - 120
Stroke of FGS (mm) *optional165310410
Stroke Gauge Resolution (mm) *optional0.0010.0010.001
Weight (kgf)190024003100
Dimension (L×W×H) (mm)970 × 1220 × 21901120 × 1610 × 24201460 × 1740 × 2450
Key Facts

1. Difference Between Lapping and Polishig Equipment

The primary way to distinguish between lapping and polishing models is whether they are equipped with a Facing & Grooving System (FGS), even if they share the same structural design. Secondly, differences also lie in the materials of the slurry and plate, as well as how the abrasive is applied to the plate. 

2. Difference Between the Standard and Advanced Models

The Double Sided Lapping and Polishing series features a pair of synthetic abrasive plates positioned vertically. This series is particularly dedicated to achieving parallelism, as well as flatness and roughness on double-sided objects. Originating from Flat Lapping, it has evolved into a distinct series, although it maintains the same abrasive techniques.

There are two variations of the upper plate within the series: Standard and Advanced. The Advanced version is more precise in terms of parallelism and stability, supported by two uprights for the upper plates. Specifically, the Advanced model is outfitted with a Dual Blade Facing & Grooving System (FGS) and an independent FGS spindle, surpassing the Standard model in performance. Consequently, the Standard model often utilizes durable abrasive plates, like cast-iron, whereas the Advanced model is compatible with a wider variety of lapping plates.

3. Facing & Grooving System (FGS)

The Facing & Grooving System (FGS) is commonly implemented in lapping machines to linearly trim along the abrasive layer of lapping plate with a disc cutter. This is done to restore the flatness of the abrasive layer to its original condition. Meanwhile, creating spiral grooves on the lapping abrasive serves to hold the slurry within the grooves for a longer period. Additionally, grooving evenly distributes the consumption of the abrasive, extending the precision of the lapping layer.

Unlike flat polishing machines, which typically do not include FGS, some polishing pads are pre-grooved before leaving the factory. Likewise, lapping plates with hard abrasives, such as cast-iron plates that are difficult for cutters to shape. For this situation, a diamond-electro-plated conditioning ring is used for plate adjustment instead. 

*The Dual Blade Facing & Grooving System is equipped with two cutters installed in opposite directions, targeting both upper and lower plates.

Facing & Grooving
System (FGS)

4. Repairing Cast Iron Plate

The lapping machine equipped with a cast iron plate might not come with a Facing & Grooving System, as it's unable to shave the cast iron abrasive for repairs due to the material's exceptional hardness and toughness. As a result, we opt for a (double-sided) diamond-electro-plated conditioning ring instead. This approach utilizes the concept of lapping, where the cast iron is lapped by the diamond layer on the conditioning ring. When using this ring, a lubricant is also necessary to smooth the repair process.

Diamond-Electro-Plated
Conditioning Ring

Cast Iron
Lapping Plate

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Dyan Precision Technology situated in the innovative city Shenzhen, occupies a production plant area of approximately 13,000 square meters and specializes in the field of grinding, lapping and polishing technology. With a focus on research and development, production, and sales, the company offers a diverse range of high-precision equipment such as flat lapping and polishing equipment, wafer grinder, wax bonder, screen polisher, and associated consumables. These products find extensive application in the precise processing of mechanical seals, semiconductor fabrication, smart phone, optics, aerospace, aviation, automotive, LED technology, metrology, solar enegery, nuclear energy, jewellary, and various other industries.
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Applicability

Process

Industry

Product

Double Sided
Lapping and
Polishing

Mechanical Seal

Seal Ring

Valve Plate

Pump Component

Fueling Component

*gas, liquid, oil

Wafer Substrate

AIN

GaAs

GaN

Ge

Ge-Si

Glass

InP

InSb

Quartz

Sapphire

Si

SiC

ZnO

Smartphone

Camera Lens

Eject Pin Key

Touch Screen

Flat Optics

Holographic Slide

HUD Screen Glass Slide

Microscope Reference Slide

Optical Lens

Optical Reflector

Scintillator Cube

Vehicle

Bearing

Clutch

Engine Mechanism

Friction Plate

Gear

Clean Energy

Electric Vehicle Battery Partition

Nuclear Energy

Solar Wafer

Wind Enegery

Metrology

Benchmark

Calibration

Gauge Block

Others

Graphite

Cutting Tools

Mechanism Components, etc.
Sampling Showcase

Sample
Thumbnail

Sample
Application

Major
Material

Dimension
(mm)

Applied
Machining

Flatness
(μm)

Parallelism
(mm)

TTV
(μm)

Roughness
(Sa/nm)

Sealing
Ring

Ceramic
Al2O3

Φ82×5.5

Lapping

1.487

1.653

4.841

Not Specified

Automotive
Component

SUS 304

Φ80×4.75

Lapping
Polishing

2.347

2.815

5.642

16.374

Pump Plate

SUS 316

Φ232×47

Lapping

1.775

2.656

4.147

Not Specified

Valve Plate

SUS 304
and Cooper

Φ173×8

Lapping

2.886

3.132

8.667

Not Specified

Valve Pad

Epoxy
Resin

Φ260×0.77

Lapping

2.835

2.989

Not Specified

Not Specified

Pump
Hatch

Carbide
Metal

Φ103×4.05

Lapping

1.823

2.138

 1.985

Not Specified

Fingerprint
Film

Ceramic
ZrO2

Φ52×0.8

Lapping
Polishing

1.583

1.973

2.112

4.349

Gauge
Block

7075
Aluminum

33×18×6

Lapping
Polishing

0.313

0.524

0.749

12.845