Jig boring machines are designed for the most demanding operations in production. For example, they are used to machine holes and then control their deviations.
What are they for?
With the help of such machines, it is possible to process center-to-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 such machines. For example, reaming, reaming and even milling.
Jig boring machines, equipped with additional equipment, also allow for control and measurement operations. For example, in complex body parts with several holes, the centers of which are at different distances from each other.
These machines are used almost everywhere: from series to mass production. Desktop units are also successfully popular among home craftsmen.
Features
Jig boring machines are equipped with special instruments, which measure fractional and integer parts of positional dimensions. Such a device also allows inspection of parts made on other machines.
Another feature of this machine is its accuracy. Center-to-centre holes can be machined with an accuracy of only 0.004 mm. Even the most high-precision machines of the drilling group cannot boast of such indicators. In addition, with the help of 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:
- Single-column. Such machines have cross tables on which the workpiece is placed for further processing. The main movements of the spindle along with the cutting tool are rotational and vertical-translational.
- Two-column jig boring machines. They have rectangular tables that move along two guides (along the X coordinate). The headstock, together with the cutting tool, moves perpendicular to the table, along the Y axis. To lower it to the table and the workpiece itself, a crossbar is used.
In addition, there is also a classification according to which such machines are divided according to the level of automation. These include:
- CNC units (most often with digital indication).
- Semiautomatic.
And also, depending on the type of operations performed, jig boring machines are:
- Specialized whodesigned to perform a single operation. For example, only drilling or countersinking.
- Multipurpose machines that can perform a variety of operations from boring to hole milling.
Popular models
Domestic jig 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 plant of jig boring machines MZKRS. These are single-column machines with an optical system for measuring coordinates along two axes Y, X. They can process workpieces by drilling, fine milling, as well as mark and control linear dimensions and center-to-center distances. These units are great for working in tool shops. Popular modifications: 2E450A, 2E450AMF4, 2D450AMF2, 2D450AF1.
It is also worth talking about the machines of the 2A450 model from the above-mentioned 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 you to accurately machine holes in the required coordinate system. Popular modifications of this machine: 2450AF1, 2A450AF10, 2L450AF11-01.
