DESIGN OF MULTI-SPINDLE DRILL HEAD WITH DIFFERENT PITCH HOLES

MULTI-SPINDLE DRILL HEAD WITH DIFFERENT PITCH HOLES

CONCEPT

Drilling is the most widely used process for producing one or multiple holes in a work piece. In this article we are going to deal with the engineering design and fabrication of a multi-spindle drill head that can be used to drill holes for different pitch circle diameters.
The purpose is to minimize the production time for drilling multiple holes in a work piece for different Pitch Circle Diameters (PCD). This design employs adjustable transmission systems along with a gear arrangement. The design of the spindle head is done using the CAD/CAM software.

PROBLEMS IDENTIFIED

  1. Production time is greatly increased if we use general purpose machines that have single spindle drilling head.
  2. The total cycle time increases when general purpose machine is used since multiple operations cannot be done in the same machine.
  3. Since multi-spindle drill head is used in work piece the tool breakage or work piece wear and tear is common because of many holes in the work piece.
  4. Manufacturer’s emphasis on quality but the demand to meet the scheduled delivery is delayed due to the conventional drilling machines slow rate of productivity.

SOLUTIONS TO PROBLEMS

  • The problem 1 can be solved by using multiple drill tools connected to the planet gears.
  • The problem 2 can be rectified if we use a multi head spindle that can carry out a number of operation in a single setting.
  • The problem 3 can be solved by limiting the number of holes drilled in the work piece.
  • The problem 4 can be overcome and the demands to meet the delivery time can be met if multi-spindle heads are used instead of general purpose machine.
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