Vacuum Tables Permanent Chucks For CNC Machining Centers And CNC Milling Machines
Brand Name:HIE
Certification:ISO
Model Number:MC0303
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Delivery Time:15 working days
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Vacuum Tables with Permanent Chucks for CNC Machining Centers and CNC Milling Machines
In the dynamic and highly competitive world of CNC machining,
workholding systems play a pivotal role in determining the quality,
precision, and efficiency of the manufacturing process. Vacuum
tables equipped with permanent chucks have emerged as a
revolutionary solution, catering specifically to the needs of CNC
machining centers and CNC milling machines. These advanced
workholding devices offer a unique combination of features that
enhance the performance of these machines and open up new
possibilities for complex and high - precision machining.
1. Design and Construction of Vacuum Tables with Permanent Chucks
Base Structure
The base of a vacuum table with a permanent chuck is typically
constructed from high - strength materials such as alloy steel or
aluminum. Alloy steel provides excellent rigidity and durability,
making it suitable for heavy - duty machining applications.
Aluminum, on the other hand, offers a lightweight alternative
without sacrificing too much strength, which can be beneficial for
machines where the weight of the workholding system affects the
overall performance, such as high - speed CNC milling machines.
The base is designed with a flat and smooth surface, which is
crucial for ensuring uniform vacuum distribution and secure
workpiece holding. Precision machining techniques are employed to
achieve a high degree of flatness, often within tight tolerances.
This flat surface also serves as a foundation for the integration
of the permanent chuck and the vacuum system.
Permanent Chuck Integration
Embedded within the base of the vacuum table are powerful permanent
magnets. These magnets are usually made of rare - earth materials
like neodymium, which are known for their strong magnetic fields.
The permanent magnets are arranged in a strategic pattern to
generate a uniform magnetic field across the surface of the table.
This magnetic field is designed to attract ferromagnetic
workpieces, providing an initial and secure hold.
The strength and distribution of the magnetic field can be
customized based on the specific requirements of the machining
operations. For example, in applications where small and delicate
workpieces need to be held, the magnetic field can be adjusted to
provide a gentle yet secure hold. In contrast, for larger and
heavier workpieces, a stronger magnetic field can be configured to
ensure a firm grip.
Vacuum System Design
The vacuum system is an integral part of the vacuum table. A
network of channels and ports is integrated into the base of the
table to distribute the vacuum force evenly across the workpiece.
These channels are connected to a vacuum source, typically a high -
performance vacuum pump. The vacuum ports are carefully designed
and placed to ensure that the vacuum pressure is uniformly applied
across the surface of the workpiece.
The surface of the table may have a series of small holes or
grooves that are connected to the vacuum channels. When the vacuum
pump is activated, air is drawn out through these holes, creating a
pressure differential between the top and bottom of the workpiece.
This pressure differential exerts a downward force on the
workpiece, pressing it firmly against the table surface. The
combination of the magnetic force from the permanent chuck and the
vacuum force provides a strong and reliable workholding solution.
Specifications
| Specification | Magnetic attraction | Width (mm) | Length (mm) | Height (mm) | Weight (kg) |
| 150*150 | ≥40KG | 150 | 150 | 80 | 13.5 |
| 150*300 | ≥40KG | 150 | 300 | 80 | 27 |
| 150*350 | ≥40KG | 150 | 350 | 80 | 31.5 |
| 150*400 | ≥40KG | 150 | 400 | 80 | 36 |
| 200*200 | ≥40KG | 200 | 200 | 80 | 24 |
| 200*300 | ≥40KG | 200 | 300 | 80 | 36 |
| 200*400 | ≥40KG | 200 | 400 | 80 | 48 |
| 200*500 | ≥40KG | 200 | 500 | 80 | 60 |
| 250*500 | ≥40KG | 250 | 500 | 80 | 75 |
| 300*300 | ≥40KG | 300 | 300 | 80 | 54 |
| 300*400 | ≥40KG | 300 | 400 | 80 | 72 |
| 300*500 | ≥40KG | 300 | 500 | 80 | 90 |
| 300*600 | ≥40KG | 300 | 600 | 80 | 108 |
| 300*800 | ≥40KG | 300 | 800 | 80 | 144 |
| 400*400 | ≥40KG | 400 | 400 | 80 | 96 |
| 400*500 | ≥40KG | 400 | 500 | 80 | 120 |
| 400*600 | ≥40KG | 400 | 600 | 80 | 144 |
| 400*800 | ≥40KG | 400 | 800 | 80 | 192 |
| 500*500 | ≥40KG | 500 | 500 | 80 | 150 |
| 500*600 | ≥40KG | 500 | 600 | 80 | 180 |
| 500*800 | ≥40KG | 500 | 800 | 80 | 240 |
| 600*800 | ≥40KG | 600 | 800 | 80 | 288 |
| 600*1000 | ≥40KG | 600 | 1000 | 80 | 360 |
2. Working Principle
Magnetic Attraction
When a ferromagnetic workpiece is placed on the vacuum table with a
permanent chuck, the permanent magnets immediately generate a
magnetic force. This magnetic force attracts the workpiece towards
the table, providing an initial hold. The magnetic attraction helps
in quickly positioning the workpiece accurately on the table. It
also ensures that the workpiece remains in close contact with the
table surface, which is essential for the effective operation of
the vacuum system.
Vacuum - Assisted Holding
Once the workpiece is in place and held by the magnetic force, the
vacuum system is activated. The vacuum pump creates a low -
pressure area beneath the workpiece by drawing air out through the
ports on the table surface. The atmospheric pressure on the top of
the workpiece then presses it firmly against the table. The
combined effect of the magnetic force and the vacuum - generated
pressure differential results in a very strong holding force.
The magnetic force acts as a complementary force to the vacuum
force. The magnetic field helps in maintaining the contact between
the workpiece and the table, even in situations where the vacuum
pressure may be slightly uneven. This dual - action mechanism
allows for the secure holding of workpieces even during high -
speed machining operations, where significant forces are exerted on
the workpiece.
3. Advantages in CNC Machining Centers
Precision Machining
In CNC machining centers, precision is of utmost importance. The
vacuum tables with permanent chucks offer a stable and secure
workholding solution, minimizing any movement or vibration of the
workpiece during machining. The uniform distribution of magnetic
and vacuum forces across the workpiece surface ensures that the
machining tools can operate with high precision.
For example, when milling complex shapes or drilling precise holes
in a workpiece, the stable hold provided by the vacuum table and
permanent chuck allows the CNC machining center to execute the
programmed operations accurately. This precision is crucial in
industries such as aerospace, medical device manufacturing, and
electronics, where even the slightest deviation from the desired
specifications can have significant consequences.
High - Speed Machining
CNC machining centers are often used for high - speed machining to
achieve efficient material removal. The vacuum tables with
permanent chucks can withstand the high - speed rotation and
dynamic forces associated with these operations. The strong and
secure hold on the workpiece ensures that it remains firmly in
place, even at high spindle speeds.
This enables aggressive machining strategies, such as high - feed
and high - depth - of - cut operations, without the risk of
workpiece slippage. In the automotive industry, for instance, high
- speed machining of engine components is made possible by the
reliable workholding provided by the vacuum table and permanent
chuck, resulting in increased productivity and reduced production
times.
Versatility in Workpiece Materials
These vacuum tables are highly versatile when it comes to workpiece
materials. They can securely hold ferromagnetic materials such as
various types of steel, iron, and some nickel - based alloys.
Additionally, by using appropriate fixtures or adapters, they can
also be used to hold non - ferromagnetic materials. The magnetic
force can be adjusted in some models to accommodate different
levels of magnetic susceptibility in the workpieces.
This versatility makes the vacuum tables suitable for a wide range
of industries and applications. Whether it's machining metal parts
in the manufacturing industry or working with composite materials
in the aerospace industry, the vacuum table with a permanent chuck
can provide a reliable workholding solution.
4. Benefits in CNC Milling Machines
Secure Workholding for Milling Operations
CNC milling machines are used for a variety of milling operations,
including face milling, end milling, and contour milling. The
vacuum tables with permanent chucks offer a secure hold on the
workpiece, ensuring that it remains stationary during these
operations. The combined magnetic and vacuum forces prevent any
movement of the workpiece, allowing the milling cutter to make
accurate cuts.
For example, when milling a complex contour on a workpiece, the
stable hold provided by the vacuum table and permanent chuck
ensures that the milling cutter follows the programmed path
precisely. This results in a high - quality milled surface with
tight tolerances.
Quick Setup and Changeover
In a production environment, time is of the essence. The vacuum
tables with permanent chucks enable quick setup and changeover
between different workpieces. Operators can simply place the
workpiece on the table, and the magnetic force immediately provides
a rough hold. The vacuum system can then be activated to firmly
secure the workpiece. When changing workpieces, the process is
equally fast. The vacuum is released, and the magnetic force can be
easily overcome to remove the workpiece.
This quick setup and changeover capability reduces the overall
production cycle time and increases productivity. In a job - shop
environment where multiple small - batch jobs are processed, the
ability to quickly switch between different workpieces is
particularly valuable, allowing for faster turnaround times and
increased customer satisfaction.
5. Customization and Integration
Customization Options
The vacuum tables with permanent chucks can be customized to meet
the specific needs of different machining applications. The size
and shape of the table can be tailored to fit the dimensions of the
CNC machining center or milling machine and the workpieces being
processed. The magnetic field strength and distribution can also be
adjusted to optimize the holding force for different workpiece
materials and shapes.
For example, in a machining operation where a large number of
small, irregularly shaped workpieces need to be processed, the
magnetic field can be configured to provide a strong hold in the
areas where the workpieces have the most contact with the table.
Additionally, the vacuum system can be customized to have different
levels of vacuum pressure, depending on the requirements of the
machining process.
Integration with CNC Machines
The vacuum tables with permanent chucks are designed to be easily
integrated with CNC machining centers and milling machines. The
integration process typically involves connecting the vacuum source
to the table and calibrating the CNC machine's control system to
work in tandem with the workholding device. In some cases, the CNC
machine may be programmed to automatically activate and deactivate
the vacuum and magnetic systems based on the machining sequence.
The seamless integration of the vacuum table and permanent chuck
with CNC machines enables precise control over the machining
process. The machine's control system can account for the
workholding conditions, ensuring that the machining operations are
executed accurately. This integration also allows for the
automation of the machining process, further increasing
productivity and reducing the risk of human error.
6. Installation and Maintenance
Installation Process
Installing a vacuum table with a permanent chuck on a CNC machining
center or milling machine involves several steps. First, the table
needs to be securely mounted on the machine's worktable. This may
require the use of appropriate mounting brackets and fasteners to
ensure stability. The vacuum source, such as a vacuum pump, is then
connected to the table's vacuum ports, and the connections are
checked for leaks.
Once the physical installation is complete, the magnetic and vacuum
systems need to be calibrated to ensure proper operation. This may
involve adjusting the magnetic field strength, testing the vacuum
pressure, and verifying the performance of any integrated sensors
or controls. In some cases, the CNC machine's control system may
need to be configured to recognize and communicate with the
workholding device.
Maintenance Requirements
Maintenance of vacuum tables with permanent chucks is relatively
straightforward. Regular inspection of the table's surface for any
signs of wear, damage, or contamination is important. The magnetic
components should be checked for any signs of demagnetization, and
the vacuum system should be inspected for leaks. The vacuum
channels and ports should be cleaned periodically to ensure proper
air flow.
The vacuum pump and associated components should be maintained
according to the manufacturer's instructions, including regular oil
changes, filter replacements, and performance checks. The seals and
gaskets in the vacuum system should be inspected regularly and
replaced if there are any signs of leakage. By following these
maintenance procedures, the vacuum table with a permanent chuck can
maintain its performance and reliability over an extended period.
7. Conclusion
Vacuum tables with permanent chucks are an essential workholding
solution for CNC machining centers and CNC milling machines. Their
unique combination of magnetic and vacuum - based workholding,
along with their customization options and ease of integration,
makes them suitable for a wide range of applications in different
industries. Whether it's achieving precision in high - tech
manufacturing or enhancing productivity in mass - production
environments, these workholding devices offer a reliable and
efficient solution. If you are involved in CNC machining and are
looking to improve the performance of your machines, consider
investing in a vacuum table with a permanent chuck. Reach out to
our team of experts to explore how this innovative workholding
solution can be tailored to meet your specific needs and take your
CNC machining capabilities to the next level.
Vacuum Tables Permanent Chucks For CNC Machining Centers And CNC Milling Machines
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