Currently, the processing of parts at different milling and boring machines, in terms of basic and applied repair manufacture special tools.One of such devices is a boring cutter.It is used for making holes of large and small diameters at different depths.Used in this boring details of the automotive industry, general engineering and instrumentation (gearbox housing, cylinder liners, bearings and bearing, etc.).
design tool
It consists of carbide rod, soldered to a steel shank, which has a flat working part.Currently, there are many new models of the device.Thanks to innovations in these instruments were much improved chip evacuation from the area of boring.In any case, the tool has a shaft boring and working part - the head.Therefore the design of this instrument is not complex.The rod has a rectangular or circular cross section.It is usually made of quality carbon steel 45. The rear portion of the shank serves for fixing in the mandrel, and the head - for setting of the cutting portion, which, depending on the size and the modification has the form of plates or inserts and is made of high speed steel P9, P18,R6M5.Slightly less common data elements from carbide (VK8, T5K10, T15K6) or mineral ceramics.
cutter boring - sharpening
This process is not difficult, if you have special equipment.This is done on grinding machines.The result is a required cutting geometry.Hones the head of the tool with a cutting plate.Formed by front, back angle and the plan.Selection tool geometry is performed based on the properties of the processed material and processing conditions.
Features
specificity of boring, especially small diameter, is shortness struzhkootvedenie.The work is conducted in a closed area, accumulating chips, slips, thereby difficult process of cutting deteriorates and heat treated surface can be damaged.To solve this problem, the coolant (coolant).She washes away and removes heat in special chips chipbreaking groove on the front surface of the cutting part of the tool.It is important in this case.Said groove is a hole with a rounded bottom.As a result of chip control elements manage to avoid the discharge of chips, which are woven into a "beard" and blocks the tool, whereby the boring tool may be damaged.
Mounting accessories
Set cutter boring in a mandrel having slots for the corresponding profile of the holder.They come in different types.They also have a tapered shank GOST.Cutter boring fixed mechanically.In the treatment of deep holes or small diameter mandrels used transition.They are selected so that you can install into the cone of the machine spindle.Short cantilevered mandrels allow you to set both the cutter and the two combined to work as a tool that increases productivity in the finishing of large holes.This is useful in this case.Also processing of holes produced on the universal machine, which is used lathe cutter boring.From the usual specified instrument it is different in size and method of attachment of the holder.The mandrels are not used.Shank cutter has a massive cross section (25x25, 32h25, 40x40 mm) and is attached to reztsederzhke machine screws.
