Vertical Composite / Follow-up Grinding Machine

Shenyang Julang Precision Machinery Co., Ltd.

Product Overview

As the core product of Shenyang Julang's deep cultivation in the grinding machine field, the VG series vertical composite grinding machine incorporates multiple innovative highlights in technical design and core performance. Relying on exquisite manufacturing processes and strict quality control, it has formed unique technical advantages that perfectly match the high standards and requirements of German-funded enterprises for precision machining equipment.

Core Features

High-Precision Positioning & Transmission System

The machine adopts a high-precision ball screw and linear guide combination structure, paired with a servo motor direct-drive design, completely eliminating transmission backlash. It achieves XZ axis positioning accuracy of ±0.003mm and repeat positioning accuracy as low as ±0.002mm, ensuring stable positioning accuracy during long-term continuous operation to meet batch processing requirements for precision parts. The transmission system also features a sealed protection design, effectively isolating dust and cutting fluid erosion, extending service life and reducing maintenance costs.

High-Rigidity Machine Body Structure

The machine body adopts high-strength cast iron material, processed through multiple treatments including resin sand casting, aging treatment, and vibration aging processes, effectively eliminating internal material stress and reducing body deformation. This provides a solid structural foundation for high-precision grinding. The machine column features an integrated casting design with strong rigidity and excellent vibration resistance, effectively suppressing vibrations during the grinding process to avoid impact on machining accuracy and ensure grinding surface quality.

Precision Spindle System

The workpiece spindle adopts a hydrostatic servo spindle with strict dynamic balance and precision calibration, with axial and radial runout controlled within <0.0002mm. The grinding spindle uses high-precision bearing configuration with runout <0.001mm. The spindle speed can be infinitely adjusted to adapt to grinding processing of different materials and precision requirements, achieving both high-speed precision grinding and low-speed heavy-load grinding needs, balancing efficiency and precision.

Composite Grinding Function Integration

As a composite grinding machine, the VG30 model can achieve integrated processing of multiple operations including internal/external cylindrical grinding, end face grinding, and step grinding without frequent equipment or fixture changes, significantly shortening the processing flow and improving production efficiency. The machine is equipped with an automatic grinding wheel dressing device that can monitor wheel wear in real-time and automatically complete dressing, ensuring stable wheel accuracy, reducing manual intervention, and lowering operational difficulty.

Intelligent Control System

Equipped with imported high-end CNC systems, supporting parametric programming and graphical operation with a simple and easy-to-understand interface for convenient operation. The system features fault self-diagnosis, accuracy compensation, and real-time monitoring of the machining process, providing real-time feedback on processing status, timely detection and early warning of abnormal situations, ensuring stability and reliability of the machining process. It also supports data networking for information-based management of production processes, adapting to modern intelligent manufacturing scenarios.

Equipment Features & Accuracy Parameters

Equipment Features: Single clamping, multi-process composite, follow-up tracking, high precision, high efficiency. Applicable Industries: Bearings, Wind Power, Automotive, Hydraulics, Aerospace, Precision Machinery, etc.

Machine Accuracy
XZ Positioning Accuracy	±0.003 mm
XZ Repeat Positioning Accuracy	±0.002mm
Workpiece Spindle Runout	＜0.0002mm
Grinding Spindle Runout	＜0.001mm

Machining Accuracy
Dimensional Accuracy	±0.002 mm
Roundness/Non-circular Profile	±0.001mm
Internal/External Circle Concentricity	0.002～0.003 mm
Surface Roughness	Ra：0.2～0.4 μm

Key Configuration

High-Precision Hydrostatic Rotary Worktable (C-Axis)

Axial/Radial Runout ≤0.001mm, No Backlash, High Load Capacity, Prevents Workpiece Sagging

Grinding Spindle + B-Axis

Grinding Spindle: Motor Spindle/Hydrostatic Spindle Axial/Radial Runout ≤0.001mm. B-Axis is driven by direct-drive motor with 0.001° swing

Multi-Axis Direct Drive

X/Z/B/C Four-Axis Linkage, Direct Drive Motor Eliminates Backlash; Motor Spindle with Online Dynamic Balancing, AE Acoustic Emission Monitoring

ATC Automatic Grinding Wheel Magazine + Online Dressing

ATC Tool Magazine: 4-8 Grinding Wheels, Diamond Roller/Pen Automatic Dressing, Automatic Size Compensation

Follow-up Control Module

Probe + Closed-Loop CNC (Siemens 840Dsl/Fanuc 31i), Achieves Non-circular Interpolation, Contour Tracking

Constant Temperature Cooling + Filtration System

Oil Temperature Control ±0.1℃, Filtration Accuracy 1μm, Suppresses Thermal Deformation

Vertical Compound Grinding & Follow-up Grinding

Vertical Compound Grinding

Vertical layout with workpiece vertically clamped on hydrostatic/electro-permanent magnetic rotary table (C-axis), completing compound grinding of internal circle, external circle, end face, step, and taper in one clamping; Multiple grinding heads + ATC grinding wheel magazine, capable of switching different grit sizes/types of grinding wheels

Follow-up (Tracking) Grinding

This is the high-end function of compound vertical grinding - through X/C/Z/B multi-axis linkage + online probe/sensor real-time feedback, the grinding head trajectory dynamically follows the workpiece contour (such as ellipse, cam, special-shaped ring, non-circular cross-section), real-time correction of grinding wheel feed and speed, offsetting machining errors and wheel wear; Different from traditional fixed-trajectory grinding, especially suitable for complex non-circular, variable curvature, high-precision contours

Product Details

Grinding head 2-position positioning: 0-degree positioning for grinding internal/external circles; 22.5-degree positioning for efficiently grinding outer diameter and end face through inclined grinding wheel. Optional arbitrary angle positioning available.
Grinding wheel spindle: Adopts HSK-A100, maximum output power 11-30Kw, grinding capacity improved through 4T-6T clamping force.
CBN grinding wheel diameter 50-305mm.
Equipped with internal, external diameter, and end face contact measuring heads, suitable for batch production (10+ pieces). Especially for large diameter or deep hole workpieces, manual measurement requires special measuring instruments or skilled techniques.
ATC tool magazine: 4-10 pieces. Achieves shortened grinding wheel change time and compound machining.
Worktable positioning stop: Facilitates positioning to improve workpiece change time; Workpiece measurement can avoid keyways and screw holes during measurement.
Single-point diamond pen dresser, optional rotary dresser.
Powerful magnetic separator, paper bag filtration system with 2-stage filtration, recommended for use when high surface finish is required or processing non-magnetic materials.
Vertical grinding machine, easy workpiece loading/unloading, short centering time; Due to not violating gravity, achieves machining with reduced clamping force (workpiece is less prone to deformation).
Oil mist collector: Recommended to place the machine in a constant temperature room, inhaling coolant oil mist from the grinding point and separating coolant components, releasing clean air outside the machine.

Technical Specifications

Item		Unit	VG300	VG600	VG800	VG1200
Machining Range	Grinding Internal Diameter	mm	Φ20～300	Φ20～400	Φ20～500	Φ20～300
	Max Grinding External Diameter	mm	～Φ350	～Φ610	～Φ8010	～Φ1210
	Max Internal Grinding Length	mm	200	200	325	325
	Max External Grinding Length	mm	Φ325	Φ325	Φ325	Φ325
	Max Workpiece Height	mm	400	400	400	400
Travel	XTravel	mm	1050	1250	1450	2450
	ZTravel	mm	400	500/800	1070	1070
	Min Setting Unit	mm	0.0001	0.0001	0.0001	0.0001
Workpiece Spindle	Electromagnetic Permanent Magnetic Chuck	mm	Φ300	Φ600	Φ800	Φ1200
	Spindle Speed	rpm	10～150	10～150	10～150	10～150
	Max Workpiece Weight	Kg	100	100	100	100
Grinding Spindle	Spindle Power	Kw	15/18.5	18.5/25	30/37	30/37
	Spindle Speed	rpm	16000	15000	12000	12000
	Spindle Interface		HSK-A63 / HSK-A100
	Max Grinding Wheel Diameter	mm	Φ20～200	Φ40～255	Φ50～305	Φ50～305
Tool Magazine	Structure Type		Umbrella
	Tool Selection Method		Bidirectional Arbitrary
	Max Tool Magazine Capacity	pcs	6
Positioning Accuracy (VID)		mm	±0.003	±0.003	±0.003	±0.003
Repeat Positioning Accuracy (VID)		mm	±0.002	±0.002	±0.002	±0.002
Machining Roundness		mm	≦0.0012	≦0.0012	≦0.0012	≦0.0012
Machining Cylindricity		mm	≦0.002	≦0.002	≦0.002	≦0.002
Machining Concentricity		mm	≦0.002	≦0.002	≦0.002	≦0.002
Machining Flatness		mm	≦0.002	≦0.002	≦0.002	≦0.002
Grinding Surface Roughness		μm	≦Ra 0.32	≦Ra 0.32	≦Ra 0.32	≦Ra 0.32
Axial Runout (Root)		mm	0.001	0.001	0.001	0.001
Radial Runout (Root)		mm	0.001	0.001	0.001	0.001
Machine Weight		Kg	12000	15000	18000	23000
Floor Space (L×W)		mm	2500×3630	3300×4100	3900×4200	4800×4900

Note: 1. Workpiece Spindle and Grinding Spindle can optionally use hydrostatic spindle

Machine Configuration

Hydrostatic Spindle

Permanent Magnet Synchronous Motor Spindle (German INNA)

Hydrostatic Rotary Worktable

Worktable (Crossed Roller Bearing)

Electromagnetic Chuck

Siemens Control System

X/Z Axis Optical Scale

Workpiece Measurement System

Tool Detection System

Diamond Pen Wheel Dresser

Coolant Chiller

Magnetic Separator + Paper Band Filter

Oil Mist Collector

Anti-fog Rotary Window

Application Fields

Military Industry

Aerospace, Semiconductor, Medical Materials

Marine & Shipbuilding

Wind Power

Precision Molds

Rail Transit

Typical Application Cases

Conventional: Bearing rings, wind power gear rings, flanges, spindle sleeves, hydraulic valve sleeves; Follow-up exclusive: Camshafts, elliptical pistons, rotor pump stators, special-shaped rings, turbocharger rotors, non-circular gear blanks.