These cylinder blocks have lot of angled cutting. Most of them is 6.8 degrees. So I made angle setting jigs. There was no way set the angle of 6.8 degrees accurately. So I used DRO to get the accurate angle. I soldered two pieces of 3mm brass together and drilled two 3mm holes with required angle obtained by CAD and DRO. ?

このシリンダー周りはいろいろ角度がつく切削が多い。一番多いのは6.8°だ。そのため6.8°の治具を作ることにした。6.8°を正確に測る手段がないのでDROを使用することに。3mmの真鍮板を二枚貼りあわせて周りを綺麗にし、CADとDROで出した6.8°の位置にφ3の穴を二個開ける。これで正確に角度は出るはずだ。

The jig material was fixed to the mill vice with 3mm metal rods passing through the holes to cut angled part.

穴に棒材を通してフライスのバイスに固定し、6.8°の面を切削。

Milled jigs.

切削完了した治具。

Corners of the jigs should have some escape cuts.

当然治具の角っこには逃げを入れておく。

The jigs in use. Used for vertical holding.

治具の使用状況。縦に使う場合。

Used for horizontal holding.

横に使う場合。


 

 
inserted by FC2 system