With tabcmd you can download the workbook like below
tabcmd get "/workbooks/Sales_Analysis.twbx" -f "C:\Tableau_Workbooks\Weekly-Reports.twbx"
with integrating of any programming tool you can send the workbook via Email
Hope this helps.
thank you for your reply , the solution was actually dimplier
that I've thought.
just hide the sheets before extracting and exporting the