JUNG CNC JF 625 GRINDING MACHINE

Description

FOR SALE GRINDING MACHINE BRAND JUNG MODEL JF 625 CNC YEAR OF CONSTRUCTION 1986. CONTROL SYSTEM SIEMENS SINUMERIK 810G WEIGHT 2500 KG INSTALLED POWER 2.2-9.5KW XYZ 600/250/500 PRICE ON REQUEST

Detailed Technical Data Sheet for Jung JF 625 CNC Grinding Machine (1986)

General Description

The Jung JF 625 CNC grinding machine is a precision machine tool designed for machining flat surfaces with high accuracy. Built in 1986, it is still appreciated today for its solidity, reliability and ability to offer high quality surface finishes. This model is equipped with the Siemens Sinumerik 810G control system, one of the first CNC (Computer Numerical Control) systems that revolutionized the control of machine tools, making it more precise and versatile.

Main Components

Magnetic Table : Flat surface that holds the piece during processing via a magnetic field.
Grinding wheel spindle : Device that houses the abrasive wheel, a key element for removing material.
Grinding Head : Component that supports the grinding spindle and allows movement along the Z axis.
Base : Rigid and heavy structure that ensures stability of the machine and dampens vibrations during processing.
CNC Control System : The Siemens Sinumerik 810G, which allows automatic programming and control of machine operations.
Movement Systems : Linear guides and ball screws for the X, Y, and Z axes, which guarantee precise and repeatable movements.
Lubrication System : Supplies oil to moving elements to reduce wear and overheating.

Technical Specifications

Weight : 2500 kg
Installed power : 2.2-9.5 kW (varies based on the operating modes and the power required by the specific process).
Race of Aces:
- X Axis (Length): 600 mm
- Y Axis (Width): 250 mm
- Z Axis (Height): 500 mm
Grinding wheel dimensions : Usually compatible with grinding wheels of variable diameter based on the processing, typically from 200 to 300 mm.
Control system : Siemens Sinumerik 810G

Workable Materials

The Jung JF 625 CNC grinding machine is designed to process hard and resistant materials, such as:

Hardened steels
Hard metals (e.g. cemented carbides)
Cast iron
Non-ferrous metals (copper, aluminum)
Composite materials

Mechanical and Structural Characteristics

The cast iron structure of the Jung JF 625 guarantees excellent mechanical stability, fundamental for precision in grinding operations. The arrangement of the XYZ axes allows three-dimensional machining, making this machine extremely versatile for different industrial applications. The system of guides and ball screws minimizes friction and wear, ensuring a long operating life.

Maintenance

To keep your Jung JF 625 CNC in good operating condition you need to follow a regular maintenance plan that includes:

Daily cleaning : Removal of processing residues and control of surfaces.
Weekly check : Check the oil level in the lubrication system and check the guides.
Monthly maintenance : Check the tension of the belts, check the condition of the grinding wheel and check the joints.
Annual overhaul : Calibration of the machine, check and replacement of worn components, such as bearings and ball screws.

Verification of the state of wear

When considering the purchase of a used Jung JF 625 CNC, it is important to examine:

Condition of the guides and screws : Check that there is no excessive play or signs of wear.
Control system status : Make sure the Siemens Sinumerik 810G is working properly, without software or hardware errors.
Machine Accuracy : Perform machining tests to evaluate the machine's ability to maintain tight tolerances.
Previous maintenance : Request maintenance documentation to understand if the machine has been cared for over time.

Sectors of Use

The Jung JF 625 CNC is mainly used in the following sectors:

Aerospace : For grinding critical components with tight tolerances.
Automotive : Used for finishing engine and transmission components.
Molds and Dies : In the processing of flat surfaces of molds to guarantee the quality of the parts produced.
Precision Mechanics : For the production of high precision components in small and medium series.

Advantages of Buying Used

Reduced Cost : Purchasing a used machine involves a lower investment than new, making the Jung JF 625 CNC a cost-effective option.
Proven Reliability : Being a machine tested over time, it is possible to obtain good results with adequate maintenance.
Limited Depreciation : A used machine has already undergone major depreciation, maintaining its value over time.
Immediate Availability : Generally, used machines are available for immediate delivery, avoiding the waiting times of a new production.

Formulas for Calibration and Optimization

To calculate the optimal machining parameters:

Cutting speed (Vc):
$\frac{\pi \times D \times n}{1000}$
Where:
- $D$ is the diameter of the grinding wheel (mm)
- $n$ is the rotation speed of the grinding wheel (rpm)
Feed rate (vf):
$n_z \times f_z \times n$
Where:
- $n_z$ $n$ $_{z}$ is
- $f_z$ $f$ $_{z}$ is
- $n$ is the rotation speed of the grinding wheel (rpm)
Depth of cut (ap) : Determined based on the hardness of the material and the capacity of the machine, it often varies from 0.005 to 0.05 mm.

Conclusion

The Jung JF 625 CNC grinding machine from 1986 represents a solid and reliable solution for precision machining in various industrial sectors. Buying a used machine of this type can be a great economical choice, as long as it has been properly maintained and is in good operating condition.