Vibration assisted drilling system and method of use

Patent metadata

Field	Value
Publication number	US-2021237172-A1
Application number	US-202016780740-A
Country	US
Kind code	A1
Filing date	Feb 3, 2020
Priority date	Feb 3, 2020
Publication date	Aug 5, 2021
Grant date	—

Abstract

A vibration assisted drilling system is presented. The vibration assisted drilling system comprises a drill feed motion system having a drill feed axis, an oscillation motion system having an oscillation axis, a drill spindle having a drill bit, and a mounting system configured to connect the drill spindle to the oscillation motion system. The drill feed axis is substantially parallel to and offset from the oscillation axis.

First claim

1 . A vibration assisted drilling system comprising:
a drill feed motion system having a drill feed axis; an oscillation motion system having an oscillation axis, wherein the drill feed axis is substantially parallel to and offset from the oscillation axis; and a drill spindle coupled to the oscillation motion system, the drill spindle having a drill bit.

2 . The vibration assisted drilling system of claim 1 further comprising:
a controller configured to synchronize an oscillation speed of the oscillation motion system and a rotation speed of the drill bit of the drill spindle.

3 . The vibration assisted drilling system of claim 1 , wherein the oscillation motion system comprises a slip plane and an actuator with the oscillation axis.

4 . The vibration assisted drilling system of claim 3 , wherein the slip plane comprises a number of linear rails and a number of bearing carts.

5 . The vibration assisted drilling system of claim 4 , wherein the drill spindle is mounted to the number of bearing carts.

6 . The vibration assisted drilling system of claim 3 , wherein the actuator is one of electro-magnetic, mechanical, or hydraulic.

7 . The vibration assisted drilling system of claim 3 , wherein the actuator is capable of an oscillation speed greater than a maximum value of a drill feed speed for the drill feed motion system.

8 . The vibration assisted drilling system of claim 1 wherein the drill feed motion system comprises a number of bearing carts and a number of linear rails, and wherein the drill spindle is connected to the number of bearing carts.

9 . A vibration assisted drilling system comprising:
a drill feed motion system, wherein the drill feed motion system has a drill feed axis; an oscillation motion system having an oscillation axis, wherein the oscillation axis is separated from the drill feed axis; and a drill spindle having a drill bit, the drill spindle mounted to the oscillation motion system.

10 . The vibration assisted drilling system of claim 9 wherein the oscillation motion system further comprises an actuator and a slip plane,
wherein the drill feed motion system comprises a servo and a number of linear rails.

11 . The vibration assisted drilling system of claim 10 , wherein the slip plane comprises a number of bearing carts and the drill spindle is connected to the number of bearing carts.

12 . The vibration assisted drilling system of claim 10 , wherein the actuator is one of electro-magnetic, mechanical, or hydraulic.

13 . The vibration assisted drilling system of claim 9 further comprising:
a controller configured to synchronize an oscillation speed of the oscillation motion system and a rotation speed of the drill bit of the drill spindle.

14 . The vibration assisted drilling system of claim 10 , wherein the actuator is capable of an oscillation speed greater than a maximum value of a drill feed speed for the drill feed motion system.

15 . A method of performing vibration assisted drilling comprising:
moving a drill spindle towards a material by a drill feed motion system having a drill feed axis; rotating a drill bit of the drill spindle as the drill spindle is propelled towards the material; and oscillating the drill spindle towards and away from the material by an oscillation motion system, wherein the oscillation motion system has an oscillation axis substantially parallel to and offset from the drill feed axis, and wherein the oscillation motion system connects the drill spindle to the drill feed motion system.

16 . The method of claim 15 further comprising:
synchronizing an oscillation speed of the oscillation motion system and a rotation speed of the drill bit of the drill spindle using a controller of a vibration assisted drilling system comprising the drill spindle, the oscillation motion system, and the drill feed motion system.

17 . The method of claim 16 wherein synchronizing the oscillation speed and the rotation speed of the drill bit while oscillating the drill spindle towards and away from the material removes drilling debris having a substantially uniform chip size.

18 . The method of claim 15 further comprising:
connecting the oscillation motion system to the drill feed motion system; and
mounting the drill spindle to the oscillation motion system.

19 . The method of claim 15 , wherein the oscillation motion system comprises an actuator capable of an oscillation speed greater than a maximum value of a drill feed speed for the drill feed motion system.

20 . The method of claim 19 , wherein the actuator is one of electro-magnetic, mechanical, or hydraulic.

Assignees

• Boeing Co

Inventors

• Chan Kwok Tung
• Weber Tobias

Classifications

• B64F5/10

  Manufacturing or assembling aircraft, e.g. jigs therefor · CPC title

• B23Q5/10 Primary

  driven essentially by electrical means · CPC title

• B23B47/00

  Constructional features of components specially designed for boring or drilling machines; Accessories therefor (working-spindles, bearing sleeves therefor B23Q1/70; for machine tools in general B23Q) · CPC title

• B23B29/125 Primary

  Vibratory toolholders · CPC title

• B23B2226/275

  Carbon fibre reinforced carbon composites · CPC title