Method and apparatus for mounting electronic part

• US 6,131,276 A
• Filed: 03/11/1998
• Issued: 10/17/2000
• Est. Priority Date: 09/11/1995
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Inutsuka, Ryoji, Ohe, Kunio, Hirotani, Koji
• Primary Examiner(s): Harrison, Jessica J.
• Assistant Examiner(s): NGUYEN, BINH AN DUC
• Application Number:
  US09/029,775
• Time in Patent Office: 951 Days
• Field of Search: 29/832, 29/836, 29/739, 29/834, 29/740, 29/741, 29/743
• US Class Current: 29/832
• CPC Class Codes: H05K 13/0406 Drive mechanisms for pick-and-place heads, e.g. details relating to power transmission, motors or vibration damping
• CPC Class Codes: H05K 13/0409 Sucking devices
• CPC Class Codes: H05K 13/041 having multiple pick-up tools
• CPC Class Codes: H05K 13/08 Monitoring manufacture of assemblages
• CPC Class Codes: Y10T 29/4913 Assembling to base an electrical component, e.g., capacitor, etc.
• CPC Class Codes: Y10T 29/49133 with component orienting
• CPC Class Codes: Y10T 29/49137 Different components
• CPC Class Codes: Y10T 29/53174 Means to fasten electrical component to wiring board, base, or substrate
• 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

The invention presents an electronic part mounting method capable of appropriately shortening the mounting cycle depending on the situation of the rotary head.

To achieve the object, the invention relates to electronic part mounting for converting continuous rotation of a rotary head driving motor into intermittent rotation of a rotary head comprising plural suction and mounting nozzles, moving the suction and mounting nozzles up and down in cooperation with the rotation of the rotary head driving motor, and mounting electronic parts by the suction and mounting nozzles while rotating intermittently so as to stop temporarily at plural stations, in which depending on the rotational speed of the rotary head driving motor for sucking and mounting stably when the rotary head is stopped, and the rotational speed of the rotary head driving motor for not changing the suction posture when the rotary head rotates, the rotary head driving motor is rotated at high speed when the rotary head rotates in the case the former is smaller, and the rotary head driving motor is rotated at high speed when sucking and mounting the rotary head in the case the latter is smaller.

Claims

1. An electronic part mounting method for converting continuous rotation of a rotary head driving motor into intermittent rotation of a rotary head, said rotary head having plural suction and mounting nozzles, and said rotary head driving motor having variable rotational speeds including at least a first rotational speed for stable suction and mounting of said electronic part when the rotary head is stopped, and a second rotational speed for not changing the suction posture when the rotary head is rotating, the method comprising the steps of:

moving said plural suction and mounting nozzles up and down in cooperation with the rotation of said rotary head driving motor; and

mounting the electronic parts by said plural suction and mounting nozzles;

wherein said rotary head driving motor is accelerated to a higher rotational speed when the rotary head is rotating and the first rotational speed is less than the second rotational speed, thereby reducing the mounting cycle time, and

further wherein said rotary head driving motor is accelerated to a higher rotational speed when the rotary head is stopped and the first rotational speed is greater than the second rotational speed, thereby reducing the mounting cycle time.

2. An electronic part mounting apparatus having a rotary head driving motor with variable rotational speeds, and a rotary head, said rotary head having plural suction and mounting nozzles, the mounting apparatus comprising:

means for converting continuous rotation of said rotary head driving motor into intermittent rotation of a rotary head;

and means for moving said plural suction and mounting nozzles up and down in cooperation with the rotation of said rotary head driving motor, for mounting the electronic parts while rotating intermittently;

further comprising means for rotating said rotary head driving motor at different speeds when said rotary head is rotating and when said rotary head is stopped for mounting the electronic parts.

3. An electronic part mounting apparatus of claim 2, wherein said means for rotating said rotary head driving motor at different speeds when said rotary head is rotating and when said rotary head is stopped for mounting the electronic parts, accelerates said rotary head driving motor to a higher rotational speed,

(a) when the rotary head is rotating and the rotary head drive motor rotational speed for stable suction and mounting is less than the rotational speed for not changing the suction posture, thereby reducing the mounting cycle time, and

(b) when the rotary head is stopped and the rotary head drive motor rotational speed for stable suction and mounting is greater than the rotational speed for not changing the suction posture, thereby reducing the mounting cycle time.