Used CNC lathe with Siemens Sinumerik 840D control

General Description

The CNC lathe in question, equipped with the Siemens Sinumerik 840D control , represents a choice of high precision and reliability in the world of mechanical turning. This fully overhauled used machine offers a combination of advanced machining capabilities and robustness, suitable for various types of machining on medium-sized parts. The make and model guarantee quality and precision, making this lathe an advantageous option for those looking for efficiency and reliability in a used machinery.

Appearance and Construction

Visually, the CNC lathe has an industrial and solid design, typical of precision machines. The structure is constructed of sturdy cast iron to ensure stability during operation and reduce vibrations. The main construction features include:

• Cast Iron Structure: Guarantees a stable and resistant base.
• Motorized turret: Equipped with 12 stations, it allows rapid tool replacement and increases productivity.
• Siemens Sinumerik 840D control: Advanced system for lathe control and programming.

Technical Specifications

Here are the key technical details of the CNC Lathe :

• Allowable Diameter on the Bench: 580 mm
• Maximum turning diameter between the tips: 400 mm
• Maximum turning length between the tips: 1000 mm
• Spindle: ASA 6"
• Spindle hole (Bar passage): 108 mm
• Spindle speed: 20-3000 rpm
• X Axis Travel: 310 mm
• Z Axis travel: 1080 mm
• X Axis Screw Diameter: 40 P x 10 mm
• Z Axis Screw Diameter: 40 P x 10 mm
• XZ Axis Rapid Speed: 20 m/min
• External Tool Size: 25x25 mm
• Boring diameter: 40 mm
• Tailstock quill diameter: 100 mm
• Stem stroke: 120 mm
• Built-in Swivel Tip: 4 CM
• Max dinghy thrust: 1450 daN
• Turret: 12 motorized stations - VDI 40
• Spindle Motor: 28 kW
• Refrigerant tank: 220 l
• Dimensions: 4775 x 2100 x 2000 mm
• Weight: 6500 kg

Usage Procedure

The CNC Lathe is used following these steps:

1. Preparation and Setup:

   • Place the lathe on a stable, level surface. Make sure that all components are mounted correctly and that the Siemens Sinumerik 840D control system is configured.
   • Refill the refrigerant tank with the appropriate liquid and check the correct functioning of the system.

2. Loading the Part and Programming:

   • Place the workpiece on the chuck and secure it securely. Use the control system to program machining specifications, such as rotational speed and feed.
   • If necessary, mount the desired tool on the motorized turret and adjust the settings via the Siemens Sinumerik 840D .

3. Processing:

   • Start the turning process. Monitor operations via the CNC and make settings changes as necessary to optimize results.
   • Use the 9 motorized and 50 tool holders to perform different operations, both radial and axial.

4. Post-Operational Control and Maintenance:

   • After machining, remove the workpiece and clean the lathe, removing chips and residue.
   • Check the operation of all components and check the coolant level.

Accessories and Options

The CNC Lathe can be equipped with various accessories and options to improve its capabilities:

• Fixed Tool Holders: 50 tool holders included, with 25 axial and 25 radial.
• Cooling and Lubrication Systems: To ensure correct operation and prolong the useful life of tools.
• Additional Tools: Various types of tools can be added to the motorized turret to perform different operations.

Optimal Use Parameters

To optimize the use of the CNC lathe , it is important to consider the following parameters:

• Cutting Speed ​​(V):

  $$V$$

  Where DD $D$ is the diameter of the piece and NN $N$ is the rotation speed in rpm.

• Advancement (F):

  $$F$$

  Where SS $S$ is the feed rate and NN $N$ is the number of revolutions.

Workable Materials

The CNC Lathe is suitable for processing a wide range of materials, including:

• Steel: For robust and durable components.
• Aluminum: For lightweight parts and precise machining.
• Special Alloys: Suitable for alloys requiring high precision.

Maintenance and Evaluation of Used Vehicles

1. Maintenance:

   • Cleaning: Keep the lathe clean of chips and residues.
   • Lubrication: Make sure all moving parts are well lubricated.
   • Fluid Check: Check coolant and other fluid levels regularly.

2. Verification of used equipment:

   • General Conditions: Check the wear of the parts and the general functioning of the machinery.
   • Functionality: Test all the main functions and verify the precision of the machining.
   • Documentation: Make sure the machinery is equipped with a manual and inspection certifications.

Sectors of Use

The CNC lathe is used in various industrial sectors, including:

• Manufacturing Industry: For the production of high precision mechanical components.
• Aerospace and Automotive Industry: For processing of complex and large parts.
• Repair Workshops: For processing and repairs of industrial components.

Advantages of Buying Used

Buying a CNC lathe has numerous advantages:

• Lower Cost: More affordable price than new, making the purchase more economical.
• Reliability: The quality and precision of the CNC lathe guarantee reliable performance.
• Ready to Use: The machine is ready for immediate use after the overhaul, with all components in good condition.

In conclusion, the Siemens Sinumerik 840D Controlled CNC Lathe