Line transfer system with a contour machining head

• US 6,640,410 B2
• Filed: 07/22/2002
• Issued: 11/04/2003
• Est. Priority Date: 04/13/1998
• Status: Expired due to Term

• Current Assignee: The Harmand Family Limited Partnership
• Original Assignee: The Harmand Family Limited Partnership
• Inventors: Harmand, Pierre, Harmand, Brice
• Primary Examiner(s): Vidovich, Gregory
• Assistant Examiner(s): Omgba, Essama
• Application Number:
  US10/201,581
• Publication Number:
  US 20030059266A1
• Time in Patent Office: 470 Days
• Field of Search: 294/070.8, 298/884.1, 298/901.22, 29/355, 29/36, 29/39, 29/41, 408/1.R, 408/3, 408/16, 408/82, 408/83.5, 408/143, 408/147, 408/150-152, 408/186, 408/238, 409/131, 409/141, 409/234, 745/73.R, 483/1, 483/15, 483/32
• US Class Current: 29/407.08
• CPC Class Codes: B23C 3/055 for engines
• CPC Class Codes: F01B 1/12 Separate cylinder-crankcase elements coupled together to form a unit
• CPC Class Codes: F02F 1/24 Cylinder heads
• CPC Class Codes: F02F 7/0031 Construction kit principle (modular engines)
• CPC Class Codes: Y10T 29/49306 Valve seat making
• CPC Class Codes: Y10T 29/49776 Pressure, force, or weight determining
• CPC Class Codes: Y10T 408/03 Processes
• CPC Class Codes: Y10T 408/5584 Engaging surface axially advanced of tool-action
• CPC Class Codes: Y10T 408/5587 Valve fitting
• CPC Class Codes: Y10T 408/76 Tool-carrier with vibration-damping means
• CPC Class Codes: Y10T 409/304312 with means to dampen vibration

Abstract

A line transfer system with a contour machining head. The system includes a transmission arbor, a housing, a contour machining head, a driving system, and a system controller. The transmission arbor mounts within the housing, with the transmission arbor and housing sharing a common central axis. At least one contour machining head mounts to the housing. The contour machining head includes a bit tool, a slidable carriage, a linkage, a counterweight, and a pilot. The bit tool is configured for machining the workpiece, and mounts to the slidable carriage. The linkage connects to the carriage and transfers a force from the transmission arbor to the slidable carriage resulting in an independent radial movement of the bit tool with respect to the central axis. The counterweight links to the transmission arbor to dynamically counterbalance the radial movement of the slidable carriage and bit tool. Finally, the pilot connects to the contour machining head and aligns the contour machining head with the workpiece. The driving system mounts to the housing, and is configured for providing a force to the transmission arbor; providing a force to the contour machining head resulting in an independent axial movement of the bit tool with respect to the central axis; and providing a force to the contour machining head resulting in an independent rotational movement of the bit tool with respect to the central axis. The system controller is configured to control the force applied by the driving system and the movement of the bit tool.

Claims

1. A line transfer system for machining a workpiece, comprising:

a transmission arbor mounted within a housing, the transmission arbor and housing sharing a common central axis;

at least one contour machining head for mounting to the housing, comprising;

a bit tool for machining the workpiece;

a slidable carriage for mounting the bit tool;

a linkage for transferring a force from the transmission arbor to the slidable carriage resulting in an independent radial movement of the bit tool with respect to the central axis; and

a counterweight linked to the transmission arbor to dynamically counterbalance the radial movement of the slidable carriage and bit tool;

a pilot to align the contour machining head with the workpiece;

a driving system mounted to the housing, the driving system configured for,

providing a force to the transmission arbor;

providing a force to the contour machining head resulting in an independent axial movement of the bit tool with respect to the central axis; and

providing a force to the contour machining head resulting in an independent rotational movement of the bit tool with respect to the central axis; and

a system controller configured to control the force applied by the driving system and the movement of the bit tool.

2. The system of claim 1, further comprising:

a workpiece rack for supporting the workpiece adjacent to the bit tool.

3. The system of claim 1, further comprising:

a casing for partially enclosing the workpiece rack.

4. The system of claim 1, wherein the bit tool is selected from the group consisting of a bit tool, a brush, and a drill.

5. The system of claim 1, wherein the linkage for transferring a force from the transmission arbor to the slidable carriage resulting in an independent radial movement of the bit tool with respect to the central axis, comprises:

a connecting rod linked to the transmission arbor, and configured for receiving the force from the transmission arbor;

a cantilever linked to the connecting rod, and configured for receiving the force from the connecting rod; and

a second connecting rod linked to the cantilever and the carriage, and configured for transferring the force from the cantilever to the carriage.

6. The system of claim 1, wherein the counterweight linked to the transmission arbor to dynamically counterbalance the radial movement of the slidable carriage and bit tool, comprises:

a connecting rod linked to the counterweight, and configured for receiving a force from the counterweight;

a cantilever linked to the connecting rod, and configured for receiving the force from the connecting rod; and

a second connecting rod linked to the cantilever and the transmission arbor, and configured for transferring the force from the cantilever to the transmission arbor.

7. The system of claim 1, wherein the driving system comprises:

a rotational drive motor linked to the transmission arbor;

an axial drive motor linked to the transmission arbor; and

a motor linked to the housing.

8. The system of claim 1, wherein the system controller is further configured for executing a set of instructions for automating one or more movements of the bit tool.

9. The system of claim 1, further comprising:

an automatic pilot tensioner configured to selectively release the pilot from the contour machining head, and further configured to retain the pilot in a fixed position, wherein the automatic pilot tensioner comprises;

means for automatically biasing a pressure to release or retain the pilot with respect to the contour machining head; and

a switch for activating the means for automatically biasing a pressure when the contour machining head is positioned in a predetermined location.

10. The system of claim 1, further comprising:

an automatic pilot guide configured to provide positional information of the contour machining head to the system controller, and further configured to position the pilot at a predetermined area of the workpiece;

wherein the automatic pilot guide comprises;

means for determining an angular position of the contour machining head with respect to a rotational axis;

means for orienting the contour machining head in a relatively vertical position with respect to the common central axis; and

means for lowering the pilot with respect to the predetermined area of the workpiece.

11. The system of claim 1, further comprising:

a force measurement apparatus configured to measure the force applied by the bit tool;

wherein the cutting force measurement apparatus comprises;

a sensor adjacent to the carriage and the bit tool and configured to generate a signal corresponding to a pressure differential on the carriage caused by a movement of the bit tool with respect to the workpiece; and

a processor configured to receive the signal and configured to determine the force upon the bit tool from the pressure differential on the carriage caused by the movement of the bit tool with respect to the workpiece.

12. A method for machining a plurality of workpieces, comprising:

mounting a transmission arbor within a housing, the transmission arbor and housing sharing a common central axis;

mounting at least one contour machining head to the housing, the contour machining head comprising;

a bit tool for machining the workpiece;

a slidable carriage for mounting the bit tool;

a linkage for transferring a force from the transmission arbor to the slidable carriage resulting in an independent radial movement of the bit tool with respect to the central axis;

a pilot to align the contour machining head with the workpiece; and

dynamically balancing the radial movement of the slidable carriage and bit tool with a counterweight linked to the transmission arbor;

activating a driving system mounted to the housing, the driving system configured for,

providing a force to the transmission arbor;

providing a force to the contour machining head resulting in an independent axial movement of the bit tool with respect to the central axis; and

providing a force to the contour machining head resulting in an independent rotational movement of the bit tool with respect to the central axis; and

monitoring the force applied by the driving system and the movement of the bit tool with a system controller.

13. A line transfer system for machining a plurality of workpieces, comprising:

a plurality of transmission arbors mounted within respective housings, the transmission arbors and their respective housings sharing a respective common central axis;

a plurality of contour machining heads for mounting to a respective housing, each contour machining head comprising;

a bit tool for machining a respective workpiece;

a carriage for mounting the bit tool;

a linkage for transferring a force from the transmission arbor to the carriage resulting in an independent radial movement of the bit tool with respect to a respective central axis;

a pilot to align the contour machining head with the workpiece; and

a counterweight to dynamically counterbalance the radial movement of the respective carriage and bit tool;

a driving system configured for

providing a force to each transmission arbor;

providing a force to the contour machining head resulting in an independent axial movement of the bit tool with respect to its respective central axis; and

providing a force to the contour machining head resulting in an independent rotational movement of the bit tool with respect to its respective central axis; and

a system controller configured to control the forces applied by the driving system and the movements of the bit tools.

14. A line transfer system with a contour machining head for machining a workpiece, comprising:

a housing;

a transmission arbor mounted within the housing, the transmission arbor and housing sharing a common central axis;

a bit tool for machining the workpiece;

a slidable carriage for mounting the bit tool;

a linkage for transferring a force from the transmission arbor to the slidable carriage resulting in an independent radial movement of the bit tool with respect to the central axis;

a pilot to align the contour machining head with the workpiece; and

a counterweight to dynamically counterbalance the radial movement of the slidable carriage and bit tool;

a linkage for transferring a force caused by the mass and movement of the counterweight to the transmission arbor;

a driving system mounted to the housing, the driving system configured for,

providing a force to the transmission arbor;

providing a force to the contour machining head resulting in an independent axial movement of the bit tool with respect to the central axis; and

providing a force to the contour machining head resulting in an independent rotational movement of the bit tool with respect to the central axis; and

a system controller configured to control the force applied by the driving system and the movement of the bit tool.

15. The system of claim 14, further comprising:

a workpiece rack for supporting the workpiece adjacent to the bit tool.

16. The system of claim 14, further comprising:

a casing for partially enclosing the workpiece rack.

17. The system of claim 14, wherein the bit tool is selected from the group consisting of a bit tool, a brush and a drill.

18. The system of claim 14, wherein the linkage for transferring a force from the transmission arbor to the slidable carriage resulting in an independent radial movement of the bit tool with respect to the central axis, comprises:

a connecting rod linked to the transmission arbor, and configured for receiving the force from the transmission arbor;

a cantilever linked to the connecting rod, and configured for receiving the force from the connecting rod; and

a second connecting rod linked to the cantilever and the carriage, and configured for transferring the force from the cantilever to the carriage.

19. The system of claim 14, wherein the counterweight linked to the transmission arbor to dynamically counterbalance the radial movement of the slidable carriage and bit tool, comprises:

a connecting rod linked to the counterweight, and configured for receiving a force from the counterweight;

a cantilever linked to the connecting rod, and configured for receiving the force from the connecting rod; and

a second connecting rod linked to the cantilever and the transmission arbor, and configured for transferring the force from the cantilever to the transmission arbor.

20. The system of claim 14, wherein the driving system comprises:

a rotational drive motor linked to the transmission arbor;

an axial drive motor linked to the transmission arbor; and

a motor linked to the housing.

21. The system of claim 14, wherein the system controller is further configured for executing a set of instructions for automating one or more movements of the bit tool.

22. The system of claim 14, further comprising:

an automatic pilot tensioner configured to selectively release the pilot from the contour machining head, and further configured to retain the pilot in a fixed position, wherein the automatic pilot tensioner comprises;

means for automatically biasing a pressure to release or retain the pilot with respect to the contour machining head; and

a switch for activating the means for automatically biasing a pressure when the contour machining head is positioned in a predetermined location.

23. The system of claim 14, further comprising:

an automatic pilot guide configured to provide positional information of the contour machining head to the system controller, and further configured to position the pilot at a predetermined area of the workpiece;

wherein the automatic pilot guide comprises;

means for determining an angular position of the contour machining head with respect to a rotational axis;

means for orienting the contour machining head in a relatively vertical position with respect to the common central axis; and

means for lowering the pilot with respect to the predetermined area of the workpiece.

24. The system of claim 14, further comprising:

a force measurement apparatus configured to measure the force applied by the bit tool;

wherein the cutting force measurement apparatus comprises;

a sensor adjacent to the carriage and the bit tool and configured to generate a signal corresponding to a pressure differential on the carriage caused by a movement of the bit tool with respect to the workpiece; and

a processor configured to receive the signal and configured to determine the force upon the bit tool from the pressure differential on the carriage caused by the movement of the bit tool with respect to the workpiece.