DYN Laboratorial Lapping Machine

Brief Introduction

The light edition and laboratory edition are specifically designed for the single-sided lapping of small to medium-sized workpieces. The series features a cast iron machine body that has undergone a three-year aging treatment, ensuring excellent stability during processing. Moreover, the series offers up to sixteen configurable options, tailored to the characteristics and processes of different workpieces, addressing a variety of machining scenarios. During some specific lapping operations, the series is capable of achieving ultra-precision machining with a flatness level below 50 nanometers.

Specifications

Key Facts

Sampling

Flat Surface Process
Inclined Surface Process
Soft Start And Soft Stop
Facing & Grooving System (FGS) ◉
Digital Control Panel

Engineering Intent

While engineering the series, meticulous efforts are made to minimize the impact of external forces from environment on the dynamic balance of the workpiece. This is aimed at achieving superior flatness accuracy. In addition, the equipment incorporates an integrated Facing & Grooving System that utilizes turning methods to eliminate any end face runout of the lapping abrasive layer, thereby restoring the flatness of the lapping plate.

System Model	DYN380
Diameter of Lapping Plate (mm)	∅ 380 × ∅ 140 × 12
Max. Diameter of Workpiece (mm)	∅ 140
Number of Stations	3
Diameter of Conditioning Ring	∅ 180
Rotation Rate of Lapping Plate (rpm)	0-140
Main Motor (kW)	0.75
Feed Rate of FGS (mm/min) *optional	10 - 120
Stroke of FGS (mm) *optional	290
Weight (kgf)	400
Dimension (L×W×H) (mm)	790 × 1070 × 730

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. What is Flat Lapping

Flat lapping is a method used for achieving precise surface flattening. Essentially, this process is utilized to enhance the flatness and, in some instances, the smoothness of the item being worked on. The majority of lapping operations involve the use of a powder-slurry and a synthetic metal lapping plate. In specific scenarios, particularly hard materials, such as diamond, undergo dry lapping with abrasive powders. Less frequently, some processes might not use any powder or slurry at all, relying solely on the lapping plate.

When the hardness of the workpiece surpasses HRA 80, lapping can achieve a mirror-smooth surface. This is because the hard material partially neutralizes the abrasive's effectiveness, leading to a fine removal of the workpiece's surface that mimics the effect of polishing thus we call it lap-polishing.

Lapping Plate

3. What is Flat Polishing

Flat Polishing is a process designed to improve surface roughness. It operates similarly to lapping on the same equipment but differs in the consumables applied. Most polishing processes involve applying a very fine powder slurry to a polishing pad, whereas lapping typically uses coarser powders and a synthetic metal plate. Polishing slurries are categorized into neutral, acid, and alkaline based on the solution's pH value.

Under microscopic examination, acid and alkaline slurries work by gradually corroding and softening the object's surface layer, transforming it into a thin film of extremely fine and soft particles. This characteristic helps the polishing pad and powder to effortlessly remove these particles, achieving an ultra-fine roughness level. This technique is known as Chemical Mechanical Polishing (CMP). Conversely, neutral slurry is used less frequently, and its application largely depends on the corrosion resistance of the material being processed.

Polishing Plate

4. 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.

Facing & Grooving
System (FGS)

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.

*Reminder: we only offer once free and limited sampling. The expenses of delivery and prourement of the sample entity are to be covered by the sender.

Sampling

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Process	Industry	Product
Flat 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	Middle Housing	SIM Card Tray Holder	Touch Screen
	Flat Optics	Holographic Slide	HUD Screen Glass Slide	Microscope Reference Slide	Optical Lens	Optical Reflector	Scintillator Cube
	Vehicle	Bearing	Brake Pad	Engine Mechanism	Friction Plate	Gear	Radar Component
	Medical	Blood Smears	Diagnostic Imaging	Microarray	Microscopy	Microfluidic	Spectroscopy
	Clean Energy	Electric Vehicle Battery Partition		Nuclear Energy	Solar Wafer	Wind Enegery
	Metrology	Benchmark	Calibration	Gauge Block	Flat Meter Probe
	Others	Graphite	Cutting Tools	Mechanism Components, etc.

Sample Application	Major Material	Dimension (mm)	Applied Machining	Flatness (μm)	Parallelism (mm)	Roughness (Sa/nm)
Valve Plate	Coated Copper	Φ140×8	Lapping	1.974	0.021	Not Specified
CNC Bits	Tungsten Carbide-cobalt	Various Size	Lapping	1.243	Not Specified	Not Specified
Slide Sealing Block	SUS 304	36×6×5.5	Lapping Polishing *convex	1.695	Not Specified	8.662
IC Package Substrate	Gold Plating and Resin	240×96×2.35	Grinding Lapping *removal	3.493	0.046	Not Specified
Pump Plate	6065 Aluminum	Φ36.6×7.95	Lapping	1.562	Not Specified	Not Specified
Solar Collector	Glass	120×120×4	Lapping Polishing	2.315	0.034	12.748
Aero Engine Casings	Special Titanium Alloy	Φ862×522	Lapping	7.5	Not Specified	Not Specified
Large Holographic Slide	Glass	Lapping Polishing	Φ685×22	10.3	0.05	5.466

Accessible Flatness (φ100mm)	1 μm
Accessible Parallelism (φ50mm)	0.02 μm
Accessible Roughness (Aluminum)	Ra. 0.001 μm

Brief Introduction

Facing & Grooving System

Inclination Chucking

Engineering Intent

1. Difference Between Lapping and Polishig Equipment

2. What is Flat Lapping

3. What is Flat Polishing

4. Facing & Grooving System (FGS)

Sampling

Find Solutions

FAQs

DYS Substrate Flat Lapping Machine

DYG1000 Semi Automatic Wafer Grinder

DYG2000 Full Automatic Wafer Grinder

DYG3000 Full Automatic Wafer Grinder

DYC2000 Full Automatic Edge Grinder

Facing & Grooving
System

Inclination
Chucking