Automatic decking and automatic fastening system

• US 6,427,321 B2
• Filed: 03/22/1999
• Issued: 08/06/2002
• Est. Priority Date: 03/22/1999
• Status: Expired due to Term

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Campbell, John, Fedato, Rino A.
• Primary Examiner(s): Hughes, S. Thomas
• Assistant Examiner(s): JIMENEZ, MARC QUEMUEL
• Application Number:
  US09/273,854
• Publication Number:
  US 20010037562A1
• Time in Patent Office: 1,233 Days
• Field of Search: 297/84, 297/99, 297/83, 297/87, 297/91, 297/95, 292/815, 294/64, 294/30, 298/972, 294/29, 297/71, 298/23
• US Class Current: 29/787
• CPC Class Codes: B62D 65/18 Transportation, conveyor or haulage systems specially adapted for motor vehicle or trailer assembly lines conveyors and haulage in general B65G
• CPC Class Codes: Y10T 29/49895 Associating parts by use of aligning means [e.g., use of a drift pin or a "fixture"]
• CPC Class Codes: Y10T 29/5337 including assembly pallet
• CPC Class Codes: Y10T 29/53383 and means to fasten work parts together
• CPC Class Codes: Y10T 29/53435 including assembly pallet
• CPC Class Codes: Y10T 29/53978 including means to relatively position plural work parts

Abstract

A vehicle assembly system automatically decks and automatically fastens body components to chassis components. The system uses an automatic decking and fastening unit that includes a base with an elevatable platform repositionable relative to the base by at least one actuator. A slidable unit carries a fastener driver, is supported on the elevatable platform, and is repositionable relative to the elevatable platform by at least one other actuator. The slidable unit also carries an arm that is repositionable relative to the slidable unit by yet another actuator. A pair of conveyors are positioned away from the base, are movable relative to the base and carry a pair of vehicle components. The conveyors are cycled so that the vehicle components are positioned relative to one another in a predetermined position, and the actuators are operated to reposition the fastener driver to a position determined by engagement of the slidable unit with one of the vehicle components.

Claims

1. An automatic vehicle component assembly for assembling a first vehicle component to a second vehicle component apparatus comprising:

a stationary base on a floor structure;

an elevatable unit supported on and repositionable relative to the base by at least a first actuator;

a slidable unit supported on the elevatable unit and repositionable relative to the elevatable unit by a second actuator;

an arm supported on the slidable unit and repositionable relative to the slidable unit by a third actuator wherein the arm includes a tooling plate near a terminal end of the arm that engages and supports the weight of the first vehicle component, and the arm is repositionable by a cylinder that extends between the slidable unit and arm;

a transfer unit positioned away from the base and movable relative to the base and carrying the first vehicle component; and

a conveying unit positioned away from the base and the transfer unit movable relative to the base and the transfer unit and carrying the second vehicle component, wherein the second actuator positions the slidable unit against the second vehicle component and the transfer unit and the arm are cycled so that the first vehicle component is positioned on the arm in a spaced apart and predetermined position relative to the second vehicle component and at least one of the first and third actuators is operated to move the arm and position the first vehicle component on the second vehicle component.

2. An automatic vehicle component assembly apparatus according to claim 1 further comprising a fastener driver carried by the slidable unit having an aligned position determined by engagement of the slidable unit against the second vehicle component.

3. An automatic vehicle component assembly apparatus comprising:

a stationary base assembly;

a base plate omnipositionable relative to the base assembly by the action of a first actuator extending between the base assembly and the base plate operating in combination with a pair of bearings located between a vertical riser of the base assembly and a vertical leg of an elevatable unit;

a centering mechanism and a pair of longitudinal bearings positioned between the elevatable unit and the base plate engaging movement of the base plate in a longitudinal direction; and

a pair of lateral bearings and a second actuator positioned between the elevatable unit and the base plate engaging movement of the base plate in a lateral direction that is perpendicular to the longitudinal direction;

a fastener driver carried by the base plate;

an arm supported on the base plate for vertical linear translation;

a transfer unit spaced away from the base assembly carrying a vehicle body component; and

a conveyor spaced away from the base assembly and the transfer unit carrying a vehicle chassis component having a fastener thereon, wherein the base plate is moved to position the arm in a predetermined position relative to the chassis component and the transfer unit is moved to position the vehicle body component on the arm and the arm is translated linearly vertically to position the vehicle body component on the vehicle chassis component so that operation of the fastener driver engages and drives the fastener on the vehicle chassis component into the vehicle body component to secure the vehicle body component to the chassis component.

4. An automatic vehicle component assembly apparatus according to claim 3 wherein the first actuator comprises a pair of cylinders extending between the base assembly and the base plate wherein the pair of cylinders includes a first cylinder having a first extensible rod connected to the base assembly and a second cylinder having a second extensible rod connected to the base plate wherein when the second extensible rod is fully extended, extension of the first extensible rod further separates the base plate from the base assembly.

5. An automatic vehicle component assembly apparatus according to claim 3 further comprising an extensible cylinder carried by the base plate wherein extension of the cylinder vertically linearly translates the arm relative to the fastener driver.

6. An automatic vehicle component assembly apparatus according to claim 3 further comprising a guide associated with the fastener driver, wherein the guide includes a flared opening assisting in directing the fastener driver into position to engage and drive the fastener on the vehicle chassis component.

7. An automatic vehicle component assembly apparatus according to claim 3 further comprising a locator carried by the base plate at a fixed position relative to the fastener driver, wherein the locator engages the vehicle chassis component to align the fastener driver with the fastener on the vehicle chassis component.

8. An automatic vehicle component assembly apparatus according to claim 7 wherein the locator has an angled wall assisting in aligning the fastener driver with the fastener on the vehicle chassis component.

9. An automatic decking and automatic fastening system comprising:

a transfer unit carrying a vehicle body component;

a conveying unit carrying a vehicle chassis component; and

a pair of automatic decking and automatic fastening units on opposite sides of the conveying unit and below the transfer unit, each including;

a stationary base assembly;

a platform elevatable relative to the base assembly by operation of a cylinder between the base assembly and the platform;

a base plate carried by the platform and slidable on a bearing toward and away from the conveying unit by an actuator between the base plate and the platform; and

an arm elevatable relative to the base plate which receives the vehicle body component from the transfer unit and lifts the vehicle body component above and in a predetermined position relative to the vehicle chassis component and then lowers, placing the vehicle body component on the vehicle chassis component.

10. An automatic decking and automatic fastening system according to claim 9 further comprising a cylinder connected to the base plate and extendible to move the base plate toward and away from the conveying unit.

11. An automatic decking and automatic fastening system according to claim 10 wherein the bearing, the cylinder and the actuator in combination enable omnidirectional positioning of the base plate relative to the base assembly.

12. An automatic decking and automatic fastening system according to claim 9 further comprising a fastener driver carried by the base plate wherein the fastener driver is capable of securing the vehicle body component to the vehicle chassis component by rotating a fastener on the vehicle chassis component.

13. An automatic decking and automatic fastening system according to claim 12 further comprising a locator carried by the base plate at a fixed position relative to the fastener driver, wherein the locator engages the vehicle body component to align the fastener driver with the fastener prior to rotating the fastener to secure the vehicle body component to the vehicle chassis component.

14. An automatic decking and automatic fastening system according to claim 13 wherein the locator has an angled wall assisting in aligning the fastener driver with the fastener.

15. An automatic decking and automatic fastening system according to claim 14 further comprising a guide associated with the fastener driver, wherein the guide includes a flared opening receiving the fastener and assisting in directing the fastener driver into position to rotate the fastener.

16. An automatic decking and automatic fastening system according to claim 14 wherein the vehicle chassis component includes a frame with a bracket rigidly connected to the frame and wherein the locator initially engages the frame near the bracket by extension of the cylinder so that the fastener driver is misaligned with the fastener and wherein further extension of the cylinder causes the fastener driver to align with the fastener as the angled wall of the locator slides on the frame.

17. An automatic decking and automatic fastening system according to claim 9 wherein the vehicle chassis component carries a bracket and wherein the arm includes an ADAF plate supporting the vehicle body component when received by the arm and wherein prior to receiving the vehicle body component the arm is aligned by the ADAF plate engaging the bracket when the actuator is extended.

18. An automatic decking and automatic fastening system according to claim 17 further comprising a fastener driver carried by the base plate and having a rotatable tool positioned near the ADAF plate, wherein the fastener driver is capable of securing the vehicle body component to the vehicle chassis component by rotating a fastener on the vehicle chassis component into the vehicle body component.