Jig boring machines are designed for the most critical operations in production. For example, they are used for hole processing and subsequent control of their deviations.
What are they for?
With the help of such machines, it is possible to process inter-center holes in a rectangular coordinate system without preliminary marking and the use of third-party devices. In addition, other types of operations can be performed on similar machines. For example, deployment, countersinking and even milling.
Jig boring machines equipped with additional equipment also allow for control and measuring operations. For example, in complex case parts with several holes, the centers of which are at different distances from each other.
These machines are used almost everywhere: from mass production to mass production. Tabletop units are also successfully popular among home masters.
Features
Jig boring machines are equipped with special instruments with which fractional and integer parts of positional dimensions are measured. A similar device also allows you to control parts manufactured on other units.
Another feature of such a machine is its accuracy. Center-to-center openings can be machined with an error of just 0.004 mm. Even the most high-precision machines of the drilling group do not boast of such indicators. In addition, using a digital display device, the error can be reduced to 0.001 mm.
Types of machines
There are two types of these machines in total:
- One-post. Such machines have cross tables on which the workpiece is installed for subsequent processing. The main movements of the spindle together with the cutting tool are rotational and vertical-translational.
- Two-racks coordinate boring machines. They have rectangular tables that move along two guides (along the X coordinate). The headstock along with the cutting tool moves perpendicular to the table, along the Y axis. To lower it to the table and the workpiece itself, a cross member is used.
In addition, there is also a classification according to which such machines are divided according to the level of automation. These include:
- Units with CNC (most often with digital indication).
- Semiautomatic devices.
And also, depending on the type of operations performed, coordinate boring machines are:
- Specialized, which are designed to perform a purely one operation. For example, only drilling or countersinking.
- Universal machines on which you can perform various operations: from boring to milling holes.
Popular models
Domestic coordinate boring machines are widely used in industry. The price of such machines is much less than foreign-made models, and in terms of functionality they are practically not inferior to foreign counterparts.
The most popular models are 2D450, which were produced by the Moscow factory of coordinate boring machines MZKRS. These are single-column machines with an optical coordinate measuring system along two axes Y, X. They can be used to process workpieces by drilling, finishing milling, and also to mark and control linear dimensions and center-to-center distances. Such units are great for working in tool workshops. Popular modifications: 2E450A, 2E450AMF4, 2D450AMF2, 2D450AF1.
Still worth talking about the machines model 2A450 from the aforementioned manufacturer. In terms of functionality, such units practically do not differ from the previous version, but they have one feature. They are equipped with turntables. This allows precise hole machining in the required coordinate system. Popular modifications of this machine: 2450AF1, 2A450AF10, 2L450AF11-01.