Re: Bevel Machining diagram
Posted: Sun Jun 02, 2013 1:38 am
Micheal is correct in his statement where parallel depth bevels are concerned. you can use an involute cutter with no filing.
However what I term 'proper' bevels cannot be done with one cutter to a finished shape because both the tooth shape and depth tapers.
As Micheal says they have to be done on specialist shaping machines. There should be no reason why Gearotic cannot do these bevels because the tool is mimicking the action of the shaping tools in that it never cuts a full profile at any time but slices.
Silly bit of obtuse history here. The parallel depth bevel was introduced commercially, didn't say invented, during WWI so machine shops could easily produce acceptable bevel gears because of the lack of dedicated gear cutting machines.
After WWI the demand went down but appeared again in WWII and in the UK this forced the British Government to get Drummonds to hand over the Drummond lathe to Myfords so they could concentrate on the Maxicut range of gear shapers.
Without this kick start the Myford lathe would probably not have been developed.
This taking away of products from companies was rife during WWII. The government took the jet engine away from whittles Power Jets company and gave it to Rover. Rover made such a botch of the job that they told Rolls Royce to give the detuned Merlin engine that was fitted to tanks and have the jet engine in return. A move that made Rolls Royce what it is today.
However what I term 'proper' bevels cannot be done with one cutter to a finished shape because both the tooth shape and depth tapers.
As Micheal says they have to be done on specialist shaping machines. There should be no reason why Gearotic cannot do these bevels because the tool is mimicking the action of the shaping tools in that it never cuts a full profile at any time but slices.
Silly bit of obtuse history here. The parallel depth bevel was introduced commercially, didn't say invented, during WWI so machine shops could easily produce acceptable bevel gears because of the lack of dedicated gear cutting machines.
After WWI the demand went down but appeared again in WWII and in the UK this forced the British Government to get Drummonds to hand over the Drummond lathe to Myfords so they could concentrate on the Maxicut range of gear shapers.
Without this kick start the Myford lathe would probably not have been developed.
This taking away of products from companies was rife during WWII. The government took the jet engine away from whittles Power Jets company and gave it to Rover. Rover made such a botch of the job that they told Rolls Royce to give the detuned Merlin engine that was fitted to tanks and have the jet engine in return. A move that made Rolls Royce what it is today.
( for me anyway ).