Portal type metal milling machine. Do-it-yourself large portal CNC milling machine

Basic equipment:

1 Machine.
2 Control unit.
3 Digital media with instructions.
4 Connecting cable.
5 Pump for cooling the spindle.
6 Spindle keys.
7 Link to download free 3D models - 2000 pcs.
8 Includes a collet for a 6 mm shank.
9 Set of workpiece clamps

The options presented below can be installed on this machine. The price indicated below in the options is added to base price machine

Portal CNC milling A machine is a high-tech equipment designed to perform tasks such as drilling, relief and plane milling, and engraving. To do this, you need to create a drawing in a special editor, load it into the control module of the machine, after which the machine itself will perform all the necessary actions. You can process wood, metal, plastic, stone and some other materials.

Advantages of CNC machines

Gantry CNC machines are capable of quickly performing high-precision milling work, and they do not require participation more labor force. One operator can service several machines at the same time. Its task, usually, is to secure (remove) the workpiece and launch the control program.

The use of a CNC milling portal machine in production can significantly reduce the time spent on the product manufacturing cycle, in comparison with the same process using conventional equipment that requires the involvement of qualified personnel.

Purchasing a milling machine with numerical control will cost an enterprise less than purchasing several conventional machines.

The speed of production and its quality will be higher. It will be possible to produce more wide range products and save on the salaries of qualified personnel, which will allow you to recoup the funds spent on equipment in a short time.

Types and scope of application

CNC portal milling machines differ in functionality and scope of use. Some devices are designed to perform a wide range of tasks. For example, on engraving and milling portal machines it is possible to produce products from various types of materials: from hard alloys to the foam. This can be 2D or 3D processing, with varying degrees of accuracy and detail. At the same time, milling machines can be processed exclusively.

Portal CNC machines of industrial type

This is the most expensive and often large-sized equipment, which is largely compensated by its reliability and functionality. Operation in industrial conditions puts forward a number of requirements for CNC machines. Uninterrupted operation to failure over a long period of time, under conditions of high loads, accuracy, the ability to process large parts. In addition, such devices are equipped with all possible equipment, such as vacuum tables, water cooling systems for the spindle and tool changing. The control of industrial CNC equipment is implemented in the form of separate consoles, on which advanced software is usually installed.

CNC machines for small businesses

This is the next industrial type of gantry machines with numerical control, which does not always mean their lower functionality or productivity relative to their older brothers. They are made according to the same principles and often with the same components.

The differences may be primarily in size and equipment. The package includes the essentials; there can be no talk of any carousel systems for changing cutting tools, unless, of course, the device was purchased for tasks requiring such a function. The operation of the device is often controlled by a computer via an LTP port or using adapters connected to USB or LAN.

Medium CNC routers are popular in small businesses, among individual entrepreneurs and for private use. They are used for milling wood and MDF in carpentry or furniture production, making monuments (stone engraving), advertising products, seals. The purchase of large, expensive CNC units for such needs is not justified and will bring losses rather than profits.

Multi-axis CNC machines

A CNC router must have at least three axes: two for positioning on the plane and one for moving the spindle with the cutting tool in the vertical direction. This functionality allows the machine to process the part in the so-called 2.5D format. This implies a relief elaboration of the plane, without milling the internal sections of the part.

On a gantry milling machine, the fourth axis is usually a lathe chuck mounted to the surface of the work table. The workpiece is clamped into it, and processing occurs by rotating the part and moving the spindle along it. This method is often used in the manufacture of balusters for stairs. However, it is a mistake to consider the lathe chuck as the fourth axis, because in most cases it is connected to the controller, which previously controlled one of the plane axes (most often X). The rotation of the chuck simulates movement along this axis.

Milling processing of full-fledged 3D objects is possible if the CNC has 5 axes. Such devices are used for making models, decorative models, and sculptures.

There are CNC milling machines with several (2 or more) spindles. Such solutions help speed up the production of identical parts.

Homemade equipment

The design and drawings for such devices are made independently. As a rule, they try to make the design according to the simplest possible scheme. In production, improvised means are used (for example, stepper motors from DVD players). Some components can be made to order, some can be purchased online.

Design features

The portal design of CNC machines implies the presence of a U-shaped portal. Its movement along the working plane ensures processing of the part along the Y axis. Along the X axis, the part is processed by moving the spindle along the portal beam.

CNC machines consist of the following elements:

• Bed. Located under the portal, there is a desktop on it, as well as guides along which the U-shaped structure moves.
• Portal. Moves over the bed. It houses the working units and mechanisms of the CNC machine;
• Stepper motors (servo motors). They set in motion mechanisms that ensure movement of the processing tool along a given axis;
• Guides. Usually rail or pipe type. Provide precise linear movement of the moving parts of the machine in a given direction;
• Movement mechanisms. There are two types: ball screw or rack and pinion set. The rotation of stepper motors through these mechanisms is converted into the movement of machine components.
• . Provides rotation of the cutting tool.
• Control system. For full numerical control of the machine , a separate rack with specially developed software is required. Budget machines can be controlled from a regular PC.

* Prices for machines are indicated without VAT, taking into account delivery to the buyer’s plant, including installation supervision

Portal vertical milling centers GR series

The HAAS series of gantry machines includes 2 models: GR-510 and GR-712. Movements along the X, Y and Z axes for the GR-510 portal type milling machine are 3073x1549x279 mm, for the GR-712 machine - 3683x2159x279 mm. Optionally, the Z-axis travel can be increased to 610 mm.

Work area

The work table with a heavy workpiece remains motionless while the machine is operating. The spindle with the cutting tool moves along the X, Y and Z axes. The portal has O-shape, which adds rigidity and reliability to the machine. As standard, the machines have a protective fence for the working area, which protects the operator and his workplace from chips and coolant.

The basic equipment of the machines also includes:

• automatic tool changer for 10 positions;
• 8100 rpm spindle with 40 taper;
• aluminum table with a grid of threaded holes;
• CNC system with 15″ color screen and USB port.

Available options for these machines are:

• automatic tool changer for 20 positions;
• 15,000 rpm spindle with 40 taper;
• steel table with a grid of threaded holes;
• 4-axis control drive for working with rotary tables;
• system of measuring wireless probes for linking the tool and the workpiece;
• increase in clearance along the Z axis by 152 mm;
• coolant supply system, etc.

Demonstration of the gantry CNC milling machine GR-712

Comparison of gantry-type vertical milling machining centers with CNC

What the Abamet company offers and how to place an order

The Abamet company can offer not only a machine, but also cutting tools, technological and tool equipment, coolant, i.e. everything necessary for him successful work. Tools, equipment, and coolant are selected based on the technological development of the received technical specifications. Our service department provides comprehensive operational support and high-quality warranty and post-warranty service.

To make a request to the portal milling machine with CNC please contact us by toll free number 8-800-333-0-222 or send a request with terms of reference on email address info@site. You can also make a request using the feedback forms on our website or by contacting the Abamet representative office in your region.

Gantry milling machine optimal for working with particularly large parts whose dimensions exceed 3x2 meters. A gantry CNC machine differs from its classic counterpart primarily in the presence of numerical control, displacement sensors, tilt sensors, and rotation speeds, which allows for greater productivity during operation. In addition, the control system often controls one universal spindle head, which copes with all operations; the spindle in such machines often has a rotation and tilt function, which adds 2 additional axes to the X, Y, Z axes. When using one spindle head, you can reduce all operations in one technological program, which can be transferred for execution to the numerical control system of the machine.

Milling machines with a classic design have a single-cantilever machine frame structure, as a result of which such machines have some limitations in terms of size and weight of the workpiece being processed; often the maximum allowable size is from 2 to 3 meters, and the weight is up to 3 tons. For processing large parts, it is required portal design frames

The portal design is based on two columns on which the edges of the horizontal beam are fixed. The spindle head, together with the vertically located spindle, moves along the guides of the cross beam. In order to speed up processing, you can use not only one spindle, but several; for example, side consoles can have one spindle each.

In the case of single-console machines, the object moves in three directions (along the X, Y, Z axes), caused by the movement of the work table. A portal milling machine allows you to move the table exclusively along the X axis. Quite often, experienced designers use a device with a fixed table, which is fixed in the foundation, to process very large workpieces. For such a machine, movement along the X axis is determined by a portal that is movable relative to the work table and the ground.

Regardless of whether the machine has a movable table or gantry, processing large workpieces requires a high load mode for the main spindle. Also, movements along the axes of the machine cause great efforts aimed at overcoming deformation and frictional forces during operation. Therefore, if you want to ensure high processing accuracy, be prepared to perform a number of tasks that increase the overall rigidity of the machine structure, reduce friction and wear of structural parts, cool the machine during operation, etc.; The specific list of required work depends on the machine model.

Each machine in the DARXTON product catalog is distinguished by high-quality assembly and materials, which guarantees reliable operation and long term services. The DARXTON online store offers to buy a portal CNC machine at the most favorable price on Russian market. The company supplies exclusively high-quality machines and components. The company's specialists inspect each machine before shipment to the buyer, and the company bears all service obligations after purchasing the product.