Catalog in PDF:
Catalog in PDF:
Firmware systems BT-BTA have been designed to make keyways and large inside/outside figures on CNC machines.
This means that in this context the firmware executed after a series other operations on the same machine: after turning, drilling, milling, etc., without removing the workpiece from the machine, you can switch to keyway piercing with obvious advantages both in terms of machining accuracy and economy.
For this type of processing, BM offers two solutions:
The first solution is the device WT, consisting of holders and nozzles. This tool especially suitable for CNC machines (turning, milling, machining center) with “y” axis and CNC machines designed specifically for broaching (grooving). The exact position of the tool in relation to the internal broaching hole achieved using all the operating functions of the CNC.
The tool is available in two gripping diameters:
Ø 25 and Ø 32. Useful piercing depth varies from a minimum of 30 mm to a maximum of 200 mm.
Second decision is a system VTA, consisting of a BT device (holder + nozzle) and an eccentric adjusting sleeve. This system from three components very suitable for CNC machines that do not have a “y” axis. Indeed, in cases where the lathe does not have a “y” axis, the concentricity of the tool BTA in relation to the inner hole, for firmware, is provided by moving the eccentric sleeve in one or the other direction. By means of the sleeve measuring scale it is possible to eliminate symmetry errors which are often encountered in this type of machining. The eccentric bushing is available in three sizes with outer diameters: 32–40–50, the axis of the inner hole is shifted by 0.5 mm in relation to the bushing axis.
The solution found in the design of the BTA system has been patented as it is truly innovative in the field of keyhole piercing.
At the moment, the market is mainly represented by a stationary tool, that is, unregulated, therefore, the angular alignment of the tool occurs after a number of attempts, and in any case without a measuring scale, which simplifies and speeds up the process itself.
KEYHOOD HIT (IN)
They are made of sintered steel with a TiN coating. The type of steel and coating make the cutter very resistant, allowing it to optimally resist the repeated impact loads that this type of machining entails.
Please note that for some nozzles, especially those with P6 and H7 tolerance, 0.2×45° bevels can be made.
In this way, during and along with the machining of the keyway, any type of burr generated during machining will be removed. The special shape of the nozzles allows you to regrind 2-3 times, thereby reducing costs. The dimensions of the nozzles in Fig. 3 are always in stock.
Nozzles are produced in metric and inch sizes.
Metric sizes
* All sizes of nozzles (IN 3, IN 4, IN 5, etc.) in versions with tolerance P6 and H7, on request, can be made with a chamfer of 0.2×45° at the point of intersection between the hole and the walls of the sewn groove, such Thus, the groove will not be left with burrs.
Inch sizes
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