IN-PROCESS PART MACHINING ORIENTATION CHANGE/INDEX

Abstract

A system and method for transferring a part being machined by a machine from a first fixture to a second fixture so that an un-machined side of the part can be exposed for machining, where the first fixture is secured to a first actuator and the second fixture is secured to a second actuator. The method includes securing the part to the first fixture, operating the first actuator so that the part is able to be machined on sides of the part except a side of the part coupled to the first fixture, and machining the part while the part is secured to the first fixture. The method operates the first actuator and the second actuator so that the part secured to the first fixture is aligned with the second fixture, and secures the part to the second fixture and releases the part from the first fixture.

Description

BACKGROUND

Field

This disclosure relates generally to a system and method for transferring a part being machined by a machine from one fixture to another fixture and, more particularly, to a system and method for transferring a part being machined by a machine from one fixture to another fixture using aligned rotary actuators so that an un-machined side of the part secured to the one fixture can be exposed for machining.

Discussion of the Related Art

When machining a part for a particular application, for example, removing metal for shaping a part from a part blank, drilling holes in a part, etc., the part is placed in a fixture in a machine, such as a CNC machine, lathe, etc., either manually or by a robot that picks the part or a part blank from, for example, a bin of parts. The part is held by the fixture at one side of the part by, for example, a mechanical chuck or a pneumatic device, which allows access to all other sides of the part by the machine, such as five sides of the part if the part is a cube. A machine tool or tools movable in the X-Y-Z directions are used to machine the part while it is being held by the fixture. The fixture can be secured to an actuator that rotates the part both clockwise and counter-clockwise in, for example, the Y-direction, thus providing another axis of freedom for machining. An additional fixture coupled to a rotary actuator can also be provided that rotates the part in the X-direction. A computer controlled operation controls the tool and the actuator to machine the part in the desired manner from all angles.

When machining of the part is so far complete, it is generally then necessary to machine the part on the side that is being held by the fixture. To do this, the part is removed from the fixture either manually or by a robot, flipped and then replaced in the fixture so that it is held at an already machined side of the part so that the tool now has access to the un-machined side. Alternately, the partially machined part can be placed in another fixture in the same machine so that the tool has access to the un-machined side or placed in a fixture of a different machine. It may be desirable for efficiency, reduction of machining time, reduction of expense, etc. to simplify the step of changing the part out from one fixture to another fixture to machine the side of the part held by the one fixture.

SUMMARY

The following discussion discloses and describes a system and method for transferring a part being machined by a machine from a first fixture to a second fixture so that an un-machined side of the part can be exposed for machining, where the first fixture is secured to a first actuator and the second fixture is secured to a second actuator. The method includes securing the part to the first fixture, operating the first actuator so that the part is able to be machined on sides of the part except a side of the part coupled to the first fixture, and machining the part while the part is secured to the first fixture. The method operates the first actuator and the second actuator so that the part secured to the first fixture is aligned with the second fixture, and secures the part to the second fixture and releases the part from the first fixture. The method then operates the second actuator so that the part is able to be machined on the side of the part that was not able to be machined when the part was coupled to the first fixture, and machines that side of the part while the part is secured to the second fixture.

Additional features of the disclosure will become apparent from the following description and appended claims, taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cut-away isometric view of a machine for machining a part, where the machine includes two fixtures that are rotatable and configured relative to each other to transfer the part from one fixture to the other fixture so that an un-machined side of the part secured to the one fixture can be exposed for machining when secured to the other fixture;

FIG. 2 is a cut-away isometric view of the machine showing the fixtures being oriented relative to each other to transfer the part from the one fixture to the other fixture;

FIG. 3 is a cut-away isometric view of the machine after the part has been transferred from the one fixture to the other fixture; and

FIG. 4 is an isometric view of an example of the part after it has been machined.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The following discussion of the embodiments of the disclosure directed to a system and method for transferring a part being machined by a machine from one fixture to another fixture using aligned actuators so that an un-machined side of the part can be exposed for machining is merely exemplary in nature, and is in no way intended to limit the disclosure or its applications or uses.

FIG. 1 is a cut-away isometric view of a machine 10 for machining parts, for example, part 12. The machine 10 is intended to represent any CNC machine, lathe, drill, etc. suitable for machining the part 12 in a desirable manner consistent with the discussion herein. The machine 10 includes a rotary tool holder assembly 14 that holds various tools (not shown), such as cutting tools, drilling tools, etc., in tool holders 16 around its perimeter for machining the part 12, where the tool holder assembly 14 may be operable to be controlled in the X-Y-Z directions. The machine 10 also includes side-by-side rotary actuators 20 and 22 mounted to a common table 24 that add two more control axes to the machine 10, where the actuator 20 rotates a circular member 28 in both the clockwise and counter-clockwise directions and the actuator 22 rotates a circular member 30 in both the clockwise and counter-clockwise directions, here along the Y-axis. The machine 10 also includes a fixture 34 having a fixture holder 36 mounted to the member 28 and a fixture 38 having a fixture holder 40 mounted to the member 30. The fixture 34 also includes a vise 42 having vise jaws 44 mounted to the fixture holder 36 and the fixture 38 also includes a vise 46 having vise jaws 48 mounted to the fixture holder 40, where the jaws 44 and 48 are operable to hold and release the part 12 while it is being machined. The part 12 is shown in FIG. 1 secured to the fixture 34 in an upright position to be ready to be machined by a tool. The part 12 is loaded into the fixture 34 as a part blank 50 from a bin 52 of the blanks 50 either manually or by a robot (not shown).

Once the part 12 has been machined on all sides except the side being held by the fixture 34, the actuator 20 rotates the fixture 34 90° counter-clockwise and the actuator 22 rotates the fixture 38 90° clockwise, as shown in FIG. 2. The actuators 20 and 22 are positioned and configured on the table 24 so that when rotated in this manner the part 12 aligns with and touches the vise jaws 48 on the fixture 38 at an already machined side of the part 12. The vise jaws 48 are then engaged to hold the part 12 and the vise jaws 44 are disengaged to release the part 12. The actuator 20 then rotates the fixture 34 90° clockwise and the actuator 22 rotates the fixture 38 90° counter-clockwise so that the part 12 is now upright in the fixture 38 as shown in FIG. 3 so that the un-machined side of the part 12 is accessible and can be machined by a tool. FIG. 4 is an isometric view of a representative example of the part 12 after it has been machined.

As mentioned, the machine 10 is merely an exemplary illustration of a machine suitable for the purposes described herein. Other machines having other orientations of fixtures, such as stacked fixtures, fixtures rotatable in the X or Z-axis, etc., can also be used within the scope of this disclosure that can be configured and oriented to transfer a part from one fixture to another fixture to machine an un-machined side of the part as described. For example, the actuators 20 and 22 could be stacked and oriented along the Z-axis, providing a five-axis machine, and still be configured to transfer the part in this manner.

The foregoing discussion discloses and describes merely exemplary embodiments of the present disclosure. One skilled in the art will readily recognize from such discussion and from the accompanying drawings and claims that various changes, modifications and variations can be made therein without departing from the spirit and scope of the disclosure as defined in the following claims.

Claims

1. A method for transferring a part being machined by a machine from a first fixture to a second fixture, said first fixture being mounted to a first actuator and said second fixture being mounted to a second actuator, said method comprising: securing the part to the first fixture;operating the first actuator so that the part is able to be machined on sides of the part except a side of the part coupled to the first fixture;machining the part while the part is secured to the first fixture;operating the first actuator and the second actuator so that the part secured to the first fixture is aligned with the second fixture;securing the part to the second fixture and releasing the part from the first fixture;operating the second actuator so that the part is able to be machined on the side of the part that was not able to be machined when the part was coupled to the first fixture; andmachining the side of the part that was not able to be machined when the part was coupled to the first fixture while the part is secured to the second fixture.

2. The method according to claim 1 wherein the first and second actuators are rotary actuators.

3. The method according to claim 2 wherein the first and second actuators are positioned side-by-side.

4. The method according to claim 3 wherein operating the first actuator and the second actuator so that the part secured to the first fixture is aligned with the second fixture includes rotating the first actuator 90° from an upright position clockwise or counter-clockwise and rotating the second actuator 90° from an upright position the opposite clockwise or counter-clockwise.

5. The method according to claim 4 wherein operating the second actuator so that the part is able to be machined on the side of the part that was not able to be machined when the part was coupled to the first fixture includes rotating the second actuator to an upright position.

6. The method according to claim 2 wherein machining the part includes using a tool movable in the X-Y-Z directions, and wherein the first and second actuators rotate in the Y direction.

7. The method according to claim 2 wherein machining the part includes using a tool movable in the X-Y-Z directions, and wherein the first and second actuators rotate in the Z direction.

8. The method according to claim 1 wherein the first fixture and the second fixture include a vise for holding the part.

9. A method for machining a part by a machine, said machine including a first rotary actuator, a first fixture coupled to the first actuator, a second rotary actuator, and a second fixture coupled to the second actuator, said first and second actuators being positioned side-by-side, said method comprising: securing the part to the first fixture;operating the first rotary actuator so that the part is able to be machined on sides of the part except a side of the part coupled to the first fixture;machining the part while the part is secured to the first fixture;operating the first rotary actuator and the second rotary actuator so that the part secured to the first fixture is aligned with the second fixture including rotating the first rotary actuator 90° from an upright position clockwise or counter-clockwise and rotating the second rotary actuator 90° from an upright position the opposite clockwise or counter-clockwise;securing the part to the second fixture and releasing the part from the first fixture;operating the second rotary actuator so that the part is able to be machined on the side of the part that was not able to be machined when the part was coupled to the first fixture; andmachining the side of the part that was not able to be machined when the part was coupled to the first fixture while the part is secured to the second fixture.

10. The method according to claim 9 wherein machining the part includes using a tool movable in the X-Y-Z directions, and wherein the first and second rotary actuators rotate in the Y direction.

11. The method according to claim 9 wherein machining the part includes using a tool movable in the X-Y-Z directions, and wherein the first and second rotary actuators rotate in the Z direction.

12. The method according to claim 9 wherein the first fixture and the second fixture include a vise for holding the part.

13. A machine for machining a part, said machine comprising: a first actuator;a first fixture coupled to the first actuator and being operable to hold the part;a second actuator; anda second fixture coupled to the second actuator and being operable to hold the part, wherein the first actuator and the second actuator are configured and positioned relative to each other so that the part is transferable from the first fixture to the second fixture so that an un-machined side of the part that was coupled to the first fixture is exposed for machining when the part is coupled to the second fixture.

14. The machine according to claim 13 wherein the first and second actuators are rotary actuators.

15. The machine according to claim 14 wherein the first and second actuators are positioned side-by-side.

16. The machine according to claim 15 wherein the first actuator and the second actuator are configured and positioned so that the first actuator is rotated 90° from an upright position clockwise or counter-clockwise and the second actuator is rotated 90° from an upright position in the opposite clockwise or counter-clockwise to transfer the part from the first fixture to the second fixture.

17. The machine according to claim 14 wherein the machine uses a tool movable in the X-Y-Z directions to machine the part, and wherein the first and second actuators rotate in the Y direction.

18. The machine according to claim 14 wherein the machine uses a tool movable in the X-Y-Z directions to machine the part, and wherein the first and second actuators rotate in the Z direction.

19. The machine according to claim 13 wherein the first fixture and the second fixture include a vise for holding the part.