Daily cron job send email Webform submissions file create an automatic excel extract of all requests and send it a specific email address every day.

How would I do this? Is there any existing Module to do this in Drupal 7?
You could create a view that shows the days submissions, use the data export module to convert it to excel, filter it by day (currrent day). Use rules module to send an email (not sure how to attach it, may need to send link). Not sure if this would work exactly how you need it.