Advanced Hydrodynamic Bearing Centerless Grinder for Precision Machining

• Customization: Available
• After-sales Service: Provide
• Warranty: One Year
• Model NO.: HC12S
• Type: Tool Grinding Machine
• Processing Object: Thread
• Abrasives: Abrasive Belt
• Controlling Mode: CNC
• Automatic Grade: Automatic
• Cylindrical Grinder Type: CNC Thread Grinder
• Precision: High Precision
• Certification: CE, ISO 9001
• Condition: New
• Transport Package: Plywood Case
• Trademark: Sunrise
• Origin: Cn
• HS Code: 8460299000

Product Description

Machine Introduction

Every centerless grinder is derived from application requirements.

1.The HC full series of centerless grinders have corresponding solutions for a grinding range of 0.08 to 200mm.
2.Hydrodynamic spindles, hydrostatic spindles, and bearing spindles are available for selection.
3.The patented products of the academician workstation - hydrostatic guideways and rectangular square guideways - are provided for different applications.
4.The CNC series with various combinations of 1 to 6 axes can meet various grinding requirements.
 

Machine Applications

The applications of centerless grinders are everywhere.

1.Through grinding: cylindrical shaft parts of various sizes
2.Stop grinding: multi - stepped parts of various sizes, parts with complex shapes

 

Product Structure

Double V tracks, rectangular square tracks, and hydrostatic tracks are used for different machine models, maximizing their respective advantages.

1.Double V Tracks
The double V tracks go through the manual scraping process. The slide plate is always fully attached to the guide rails of the machine tool bed throughout the entire stroke range, ensuring excellent movement performance within the effective stroke. The double V track structure is stable, has a low maintenance cost, and offers a high cost - performance ratio.

2.Rectangular Square Tracks
Rectangular square tracks have unique advantages when applied to large - scale centerless grinders. The enlarged track surface is combined with a wear - resistant plastic - coated slide plate, achieving both the sensitivity of sliding and ultra - high rigidity.

3.Hydrostatic Tracks
The hydrostatic tracks are products designed and developed by the Fuxincheng Academician Workstation and have successfully applied for invention patents. The track design adopts orifice throttling. During operation, the track floats in a high - pressure oil film, with a friction coefficient less than 0.001, no wear, and a long service life. The hydrostatic tracks can achieve a feed accuracy of 0.0001mm.

4.Track · Slide Plate
The track · slide plate, combined with a high - precision ball screw, can be equipped with manual and automatic fine - feeding, with an accuracy of up to 0.001mm.

Corresponding lubrication oil channels and lubrication systems are designed for various tracks to ensure normal operation of the tracks and safety against wear.

Hydrodynamic Spindle / Hydrostatic Spindle

1.The core shaft of the hydrodynamic spindle is made of Japanese SNCM-21H alloy steel through more than ten processes. It is manually and repeatedly matched, ground, scraped and assembled with the alloy bearing, and is equipped with a lubrication system to ensure the rotational accuracy and rigidity of the spindle.

2.The hydrostatic spindle is a patented product of the academician and expert workstation. The spindle is supported by a high-pressure oil film, with no contact friction, reducing power consumption and improving accuracy and shock absorption performance. It performs even more outstandingly in high-speed cutting.

 

Rolling bearing spindle

Select ultra-precision double row cylindrical roller bearings, lubricated with grease, requiring no maintenance in normal times. The unique design eliminates the need for a flange, making it suitable for high-precision grinding.

Trimming seat / Grinding wheel and regulating wheel trimming

1.Trimming seat
The trimming seat is made of a special alloy casting with hand-scraped patterns. It is driven by a variable-speed hydraulic pressure or can also be driven by a servo motor equipped with a precision ball screw for stepless speed change.

2.Grinding wheel and regulating wheel trimming
According to the requirements of the workpiece grinding process, the trimming of the grinding wheel and the regulating wheel is divided into diamond pen trimming, diamond disc trimming, and diamond profile roll trimming. Under special circumstances, the diamond disc trimming wheel can be replaced with an ordinary silicon carbide grinding wheel to trim a new diamond grinding wheel.

CNC system and software

The CNC control system is selected for the CNC centerless grinder. Precision ball screws are used in combination with servo motors for numerical control.
It can achieve automatic feeding of the upper and lower slides according to the grinding process, and realize automatic dressing and automatic compensation of various shapes of the grinding wheel and regulating wheel. This greatly improves the processing ability of the centerless grinder for workpieces with complex shapes and reduces the difficulty of manual operation.
A variety of automatic loading and unloading and automatic detection solutions are available for matching and selection, enabling fully automatic processing and production of high-precision parts.

Through-type grinding

Through-type grinding is suitable for all kinds of round pipes, round bars, rods and valve cores. Different automated feeding and discharging devices can be matched according to the workpiece size. It has high grinding efficiency, reaching several meters per minute, which can greatly reduce the production cost.





Stop-type grinding

Stop grinding is suitable for parts with multiple steps and complex shapes. According to the characteristics of the workpiece, different ways of dressing the grinding wheel can be selected, and different automatic feeding and discharging devices can be designed. This greatly reduces the operation difficulty and improves the production efficiency.

 

Machine Specifications

Item		HC - 12S	HC - 18S	HC - 1810S	HC - 1812S	HC - 20S
Machining Diameter	Standard Worktable	Ø0.5 - 40mm	Ø0.5 - 60mm			Ø1 - 60mm
	Special Worktable	Ø30 - 40mm	Ø40 - 120mm			Ø1 - 120mm
Grinding Wheel Spindle	Grinding Wheel Size	Ø305x150xØ120mm	Ø455x205xØ228.6mm	Ø455x255xØ228.6mm	Ø455x305xØ228.6mm	Ø510x205xØ254mm
	Motor Power	7.5HP	15HP	20HP	20HP	20HP
	Grinding Wheel Speed	1950 R.P.M	1520 R.P.M			1350 R.P.M
Adjusting Wheel Spindle	Adjusting Wheel Dimensions	Ø205x150xØ90mm	Ø255x205xØ111.2mm	Ø255x255xØ111.2mm	Ø255x305xØ111.2mm	Ø305x205xØ127mm
	Adjusting Speed	10 - 300 R.P.M	10 - 250 R.P.M			10 - 250 R.P.M
	Motor Power	2.0kw (Servo)	3.0kw (Servo)			3.0kw (Servo)
	Adjusting Wheel Tilt Angle	+5° ~ - 3°	+5° ~ - 3°			+5° ~ - 3°
	Adjusting Wheel Rotation Angle	+5° ~ - 5°	+5° ~ - 5°			+5° ~ - 5°
Handwheel	Lower Rail Feed Handwheel	7.0 revolutions/0.01 scale	9.0 revolutions/0.01 scale			9.0 revolutions/0.01 scale
	Lower Rail Fine - tuning Handwheel	0.2 revolutions/0.001 scale	0.2 revolutions/0.001 scale			0.2 revolutions/0.001 scale
	Upper Rail Feed Handwheel	3.5 revolutions/0.05 scale	3.5 revolutions/0.05 scale			3.5 revolutions/0.05 scale
	Upper Rail Fine - tuning Handwheel	0.1 revolutions/0.001 scale	0.1 revolutions/0.001 scale			0.1 revolutions/0.001 scale
	Adjusting Rail Feed Handwheel	1.5 revolutions/0.01 scale	2.0 revolutions/0.01 scale			2.0 revolutions/0.01 scale
Drive Motor	Oil Pressure Pump Drive Motor	1HP	1HP			1HP
	Cooling Pump Drive Motor	1/8HP	1/4HP	1/4HP	1/2HP	1/2HP
Spindle Structure		Hydrostatic Spindle	Hydrostatic Spindle/Static Spindle Optional
Package Size		2350x1650x1770mm	2900x2400x1850mm			2900x2400x1850mm
Machine Weight		1700Kgs	2800Kgs	2800Kgs	2850Kgs	2850Kgs
Package Weight		2100Kgs	3250Kgs	3250Kgs	3300Kgs	3300Kgs