Machining gears has always been a challenge. For years it has required a dedicated machine and an additional operation to machine the teeth in the part. However, in recent years different options for machining gears in standard machine tools have been developed.
The aim of this document is to explain the process for gear machining known as power skiving. Power skiving has been around for over a century but recently it is becoming a trend due to more rigid machines and better synchronisations between the spindles. This option not only allows to machine gears at much higher speeds (3 times faster than hobbing) but also allows to machine internal as well as external gears and gears with a very small shoulder, something that hobbing would not allow.
Power skiving requires a special toolholder as well as a custom-made tool. The machine used for this application also needs to have Y axis.
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Polygon turning is a process through which flat planes are obtained on the piece through synchronized rotation of the spindle and the live tool. Polygon turning can be performed on our CMZ CNC lathes. It is an alternative process to milling each surface individually. It is more similar to lathing…
The geometry of the gear in the gear hobbing process is obtained by the synchronised movement between the spindle and the live tool. The limit to manufacture gears in a CMZ CNC lathe is around the hob tool being able to produce the required profile but for occasional machining. Bigger gears require…
We can often find features in our drawings where an angular machining operation is required. With standard toolholders these features are not achievable because only operations in X and Z directions are possible with standard live toolholders. However, there are some adjustable angle heads in the…
We would like to welcome helical gear hobbing in a CNC lathe and say goodbye to the dead time that occurs when you have to turn and hob on two different machines. The range of possibilities is very broad since we can hob cylindrical gears with both straight and helical teeth. Technical characteristics…
Our applications department can analyse in detail the process to be carried out and offer you a part study helping you to reduce cycle times.
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