Compound CNC grinding machine

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Vertical Compound Grinding Machine

A CNC grinding machine uses a rotating grinding wheel to remove small amounts of material from a workpiece. They are, first and foremost, finishing machines. In the case of round work, a machinist often removes significant amounts of material using a lathe before transferring the part to a cylindrical grinding machine for the finishing operation.

CNC grinding is primarily about taking off small amounts of metal with a high-speed abrasive rotating wheel acting as the cutting tool. The grinding wheel rotates in place while the part is fastened to the machine and moves in the X-, Y-, or Z-axis. Although these movements depend on the part’s shape and size, the grinding wheel usually requires multiple passes to get the correct finished dimension.

All BDF CNC grinders are specifically configured, tooled and programmed to suit the end user’s most demanding requirements. Our capabilities include not only conventional grinding, but high speed superabrasive grinding, where we lead the industry in precision and productivity standards.

BDF’s unique machine features and vast expertise with superabrasives offers successful solutions for difficult to cut materials such as carbide, ceramic, exotic aerospace alloys, and hard tool steels.

We Provide Diversified Solutions, Including Customized Ones

CNC vertical composite grinding machine for inner bores, end faces and external diameter

VM, VHM, DVM series high-precision CNC vertical composite grinding machines are vertical composite grinding machines with full closed-loop digital control independently designed and developed by the Company. The grinding machines have a vertical layout and double-column structure. High-precision liquid hydrostatic rotary table is air-tight and wear-free and may realize longer service life and accuracy retention time.

Reasonable and compact structural design; the workpiece can be clamped once to complete the multi-process grinding processing of the inner hole. outer circle and step surface, to ensure that the parts of the higher requirements for positional accuracy; widely used in bearings, wind power, construction machinery, valves, automotive and other industries.

Working Environment and Processing Capacity

Processing capacity:

Suitable for I.D., O.D. and end face grinding of heavy, non-circular workpieces.
Heavy workpieces can be fixed on the fixture by hanging.
Free combination of single spindle, double spindle, tool changer or no tool changer.
Easy clamping operation may significantly reduce the preparation time for loading, unloading, alignment etc.
No need of setting the processing site, automatic compensation of workpiece size, automatic compensation calculation of grinding wheel position compensation.
Double spindle models can be provided with high and low speed grinding wheels, or one vertical and one horizontal spindles.

Characterisation:

Siemens 828D CNC system adopted in the machine can realize multi-axis servo control.
To meet the processing requirements, automatic and manual (electronic handwheel) control can be carried out for each processing element of the parts.
Fully enclosed protection may offer excellent operability, maintainability and safety.

Operating environment of the machine: (user provided)

Ambient Temperature: 10-35°C ;optimal temperature 20±2°℃;

Relative Humidity: ≤85%;

Working Power Supply: three-phase AC 380V±10%, 50±1%Hz；

Dry Clean Gas Source Pressure: ≥0.7MPa, Flow Rate: ≥50m3/h;

Workpiece dimensions

Size
Vertical compound grinding machine55: （OD) 280×200×180mm
Vertical compound grinding machine85/125/160: （OD)400×300×250mm

Material
Grade 45 Carbon Structural Steel or Gray Cast Iron HT300

Test item accuracy evaluation:

Test item	Test accuracy (Manufacturer)	As-Measured (For Reference)
Roundness	1.0μm(2.0μm*1)	0.5μm
Cylindricity	2.0μm	0.85μm
Coaxiality	2.0μm	1.0μm
Roughness	Ra0.20μm	Ra0.17μm
Verticality	2.0μm	0.18μm

1.The roundness specification set by the manufacturer for models Vertical Compound Grinding Machine 125 and above is 2.0 μm.
2.The data in this table are actual measured values (for reference) obtained from the Vertical Compound Grinding Machine 85.

Positioning Accuracy & Repeatability: Linear X &Z Axes (Reference)

	X-Axis (Ref. Measured Data)	Z-Axis (Ref. Measured Data)
Positioning Accuracy	3.45μm	2.75μm
Positioning Repeatability	2.65μm	2.22μm

This data was obtained in accordance with the measurement method specified by international standard ISO 230/2 (1988). The machine tool was set up based on the manufacturer's specified measurement procedure and operated in an ambient temperature of 22°C ±1°C.

Standard accessory tools (shanks - grinding wheels):

Vertical Compound Grinding Machine 55/85/125( The following 6 types of accessory tools are available)

The grinding wheel with maximum diameter of p 255 mm ( 305 mm) can be stored in the ATC unit. However, the size of adjacent toolshould be limited to A 180 mm or less.
*Vertical Compound Grinding Machine 85/125

Control Panel Interface

In terms of the control panel, the dialogue box on 15.6 inch touch screen ensures more efficient, user-friendly and easy systeml operations. In such user-friendly dialogue box mode, just enter the parameters so that the program automatically calculates the cross section parameters of the grinding wheel. Perform one key touch to generate the program for automatic calculation of the machining path and automatic dressing of the grinding wheel. On the operation interface we can see the processing path and operate in a morel concise and convenient manner.

Typical Example

Machine specification:

*Notes:
1. The above specifications are given mainly based on the size of rotary table size. Single spindle, double vertical spindles or one vertical and one horizontal spindles are available for choice. Tool change or no tool change can also be selected.
2. The above specifications and configurations can be customized according to processing requirements of customers.

Double Vertical Compound Grinding Machine

Dual-spindle vertical grinding machine, equipped with two spindles, available in high-power and low-power versions, perfectly addresses the diversity of grinding parts, reduces the time customers spend on frequent tool changes, and enhances grinding efficiency.

Machine specification:

*Notes:
1. The above specifications are given mainly based on the size of rotary table size. Single spindle, double vertical spindles or one vertical and one horizontal spindles are available for choice. Tool change or no tool change can also be selected.
2. The above specifications and configurations can be customized according to processing requirements of customers.

CNC Horizontal Multi-Functional Universal Grinding Machine

Inspection Items	Inspection Accuracy (Manufacturer)
Roundness	3.0 μm
Cylindricity	3.0 μm
Coaxiality	3.0 μm
Roughness	Ra 0.40 μm
Perpendicularity	3.0 μm
Test piece machining	Final acceptance

Machine specification:

Item		HFM-4030	HFM-4050	HFM-4080
Basic parameters	Swing Diameter of the Worktable Spindle	400	400	400
	Maximum Load Capacity of the Worktable	100kg (including fixture)	200kg (including fixture)	250kg (including fixture)
	Maximum Rotational Speed of the Work Turntable	0~800r/min	0~500r/min	0~300r/min
	Power of the Workpiece Spindle	15KW	20KW	25KW
Processing capacity	Hole diameter grinding range	Φ10~Φ350	Φ10~Φ390	Φ10~Φ390
	External circle grinding range	~Φ370	~Φ400	~Φ400
	Grindable length (inner bore)	200mm	300mm	300mm
	Grindable length (external circle)	≤300mm	≤500mm	≤800mm
Rotary Axis (C-Axis) of the Workpiece Axis	Indexing Angle	+90°~45°	Fixed	Fixed
Rotary Axis (A-Axis) of the Grinding Wheel Axis	Indexing Angle	Fixed	Arbitrary	Arbitrary
Grinding Wheel Axis for External Grinding	Power (kw)	22KW	22KW	22KW
Grinding Wheel Axis for External Grinding	Maximum speed	0-2500r/min	0-2500r/min	0-2500r/min
Grinding Wheel Axis for Internal Grinding	Power (kw)	15KW	15KW	15KW
Grinding Wheel Axis for Internal Grinding	Maximum speed	4000-10000r/min	4000-10000r/min	4000-10000r/min
Linear servo axis	X-axis travel	850mm	600mm	600mm
	X1-axis travel	450mm	1200mm	1200mm
	Z2 axis travel	450mm
	Quick travel (m/min)	0~15m/min	0~15m/min	0~15m/min
	Feed resolution	0.0001mm	0.0001mm	0.0001mm
	X-axis positioning accuracy	≤0.005	≤0.005	≤0.005
	X-axis repeat positioning accuracy	≤0.003	≤0.003	≤0.003
	Z-axis positioning accuracy	≤0.006	≤0.006	≤0.006
	Z-axis repeat positioning accuracy	≤0.004	≤0.004	≤0.004
NC	SIEMENS	Sinumerik 828D	Sinumerik 828D	Sinumerik 828D
Machine weight (kg)	Net weight	6500	8000	10000

Processing Case

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Vertical Compound Grinding Machine

We Provide Diversified Solutions, Including Customized Ones

Working Environment and Processing Capacity

 Processing capacity:

 Characterisation:

 Test item accuracy evaluation:

 Positioning Accuracy & Repeatability: Linear X &Z Axes (Reference)

 Standard accessory tools (shanks - grinding wheels):

Control Panel Interface

Typical Example

 Machine specification:

 Machine specification:

 Machine specification:

Processing Case

Processing capacity:

Characterisation:

Test item accuracy evaluation:

Positioning Accuracy & Repeatability: Linear X &Z Axes (Reference)

Standard accessory tools (shanks - grinding wheels):

Machine specification:

Machine specification:

Machine specification: