Parts mounting method and parts mounting apparatus

• US 20020042989A1
• Filed: 08/28/2001
• Published: 04/18/2002
• Est. Priority Date: 08/29/2000
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Uchiyama, Hiroshi, Kawase, Takeyuki, Yoshida, Noriaki, Shimizu, Junkei
• Granted Patent: US 6,862,803 B2
• Time in Patent Office: Days
• US Class Current: 29/832
• CPC Class Codes: H05K 13/041 having multiple pick-up tools
• CPC Class Codes: H05K 13/0417 Feeding with belts or tapes
• CPC Class Codes: H05K 13/0478 Simultaneously mounting of different components
• CPC Class Codes: Y10T 29/4913 Assembling to base an electrical component, e.g., capacitor, etc.
• CPC Class Codes: Y10T 29/49131 by utilizing optical sighting device
• CPC Class Codes: Y10T 29/49133 with component orienting
• CPC Class Codes: Y10T 29/53087 with signal, scale, illuminator, or optical viewer
• CPC Class Codes: Y10T 29/53091 for work-holder for assembly or disassembly
• CPC Class Codes: Y10T 29/53178 Chip component
• CPC Class Codes: Y10T 29/53191 Means to apply vacuum directly to position or hold work part

Abstract

A suction section provided with a plurality of suction nozzles is used. The suction section is moved to a parts supply section in which a plurality of parts are stored so that they can be sucked at the same time, the parts stored in the parts supply section are sucked onto the plurality of suction nozzles at the same time, and the sucked parts are mounted on a board. At this time, all suction nozzles each involving a shift amount within an allowable range in which simultaneous suction is possible are set in one group and suction nozzles each involving a shift amount outside the allowable range in which simultaneous suction is possible are set in a different group and the parts are sucked at the same time for each of the groups.

Claims

1. A parts mounting method, comprising the steps of:

moving a suction section, including a plurality of suction nozzles, to a parts supply section in which a plurality of parts are stored so that they can be sucked at the same time,

sucking the parts stored in the parts supply section onto the plurality of suction nozzles at the same time; and

mounting the sucked parts on a board,

wherein the suction nozzles classified into groups according to their shift amount, the shift amount of the suction nozzles in each group are within an allowable range for simultaneous suction, and suction nozzles each involving a shift amount outside the allowable range in which simultaneous suction is possible are set in a different group,

and then the parts are sucked at the same time at each group.

2. A parts mounting method according to claim 1:

wherein the shift amount is defined between the parts sucked by the suction nozzles and the suction nozzles.

3. The parts mounting method according to claim 2 further comprising;

a step of calculating a position correction value of each suction section according to the shift amount at each group classified,

wherein the parts are sucked at the same time at each group after correcting a position of each suction section by using the position correction value.

4. The parts mounting method according to claim 3,

wherein the position correction value of the suction section is an average of the maximum and the minimum of the shift amount,

wherein the shift amount is defined between the center of each suction nozzle and the center position of a part at a parts suction position.

5. The parts mounting method according to claim 2 further comprising the steps of:

detecting each position of a plurality of the suction nozzles; and

calculating a shift amount according to the each position detected,

wherein the shift amount is defined between a center position of the suction nozzle and a center position of the parts at the point where the parts are sucked.

6. The parts mounting method according to claim 5,

wherein the center position of the suction nozzle is detected after recognizing a tip face of each suction nozzle.

7. The parts mounting method according to claim 6,

wherein the center position of the suction nozzle is detected after placing an inspection jig on each suction nozzle.

8. The parts mounting method according to claim 3,

wherein the shift amount is between the center of each suction nozzle and the center of a part, the shift amount is found by a parts recognition unit for recognizing the suction state of the part onto the suction nozzle, and

the groups of the suction nozzles and the position correction value of the suction section at each group are changed according to the shift amount,

wherein the parts are sucked simultaneously at each of the groups.

9. The parts mounting method according to claim 1,

wherein suction nozzles are classified into a specific group in order to suck the parts,

wherein, at the suction nozzles classified, errors for suction have occurred exceeding an allowable number of times or the parts suction ratio is less than an allowable value.

10. The parts mounting method according to claim 1 further comprising:

a feature to select a mode of allowable range for simultaneous suction from several modes; and

a feature to set the selected mode in order to classify the suction nozzles into several groups according to the modes,

wherein the modes are divided into several ranks between a mode for giving high priority to productivity and a mode for giving high priority to parts suction ratio.

11. The parts mounting method according to claim 2,

wherein the shift amount between the center of a part at a parts suction position and the center of each suction nozzle,

and the shift amount is corrected by changing a feed amount of the parts from the parts supply section.

13. The parts mounting apparatus according to claim 12,

wherein the control section calculates a position correction value of the suction section according to the shift amount for each of the groups and corrects the suction section based on the position correction value.

14. The parts mounting apparatus according to claim 13,

wherein the position correction value of the suction section is an average of the maximum and the minimum of the shift amount,

wherein the shift amount is between the center position of each suction nozzle and the center position of a part at a parts suction position.

15. The parts mounting apparatus according to claim 12 further comprising:

a database storing as many data pieces of the shift amount between the center position of each suction nozzle and the center position of a part at each parts suction position as the number of combinations of the number of the suction nozzles and the number of the parts suction positions.

16. The parts mounting apparatus according to claim 13 further comprising:

a parts recognition unit for recognizing the suction state of each part onto each suction nozzle,

wherein the control section finds the shift amount between the center position of each suction nozzle and the center position of a part by the parts recognition unit and changes the group of the suction nozzles where the simultaneous suction operation is to be performed and the position correction value of the suction section for each group in response to the shift amount.

12. A parts mounting apparatus comprising:

a suction section provided with a plurality of suction nozzles,

a parts supply section in which a plurality of parts are stored so that they can be sucked at the same time, and

a control section for performing control so as to move the suction section to the parts supply section, suck the parts stored in the parts supply section onto the plurality of suction nozzles at the same time, and mount the sucked parts on a board,

wherein the control section performs control so that the suction nozzles classified into groups according to their shift amount defined between the parts and the suction nozzles,

wherein the suction nozzles classified into groups according to their shift amount, the shift amount of the suction nozzles in each group are within an allowable range for simultaneous suction, and suction nozzles each involving a shift amount outside the allowable range in which simultaneous suction is possible are set in a different group,

and then the parts are sucked at the same time at each group.