Packaging sequence determining method

• US 5,224,325 A
• Filed: 11/06/1991
• Issued: 07/06/1993
• Est. Priority Date: 11/06/1990
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Takahashi, Shino, Kobayashi, Hideaki, Takata, Masahito
• Primary Examiner(s): Culver, Horace M.
• Application Number:
  US07/788,788
• Time in Patent Office: 608 Days
• Field of Search: 53/443, 53/396, 53/474, 53/51, 53/55, 53/238, 53/244, 53/155, 53/445, 29/740, 29/741, 29/759, 29/834, 29/835, 29/836
• US Class Current: 53/443
• CPC Class Codes: B65B 15/04 Attaching a series of articles, e.g. small electrical components, to a continuous web ammunition filling F42B
• CPC Class Codes: G05B 19/41865 characterised by job scheduling, process planning, material flow
• CPC Class Codes: H05K 13/085 Production planning, e.g. of allocation of products to machines, of mounting sequences at machine or facility level
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
• CPC Class Codes: Y10T 29/49133 with component orienting

Abstract

A method of determining the packaging sequence of a packaging machine for mounting parts on a substrate at a plurality of designated positions by placing a substrate on a table and displacing the table relative to a parts holding device the method includes the steps of determining the displacing sequence to satisfy a constraint concerning the packaging sequence and to minimize the total amount of displacement of the table when mounting the parts on the substrate, and grouping together the parts that are to be successively mounted on the substrate at each of the designated positions after the table has been displaced relative to the parts holding device.

Claims

1. A method of determining a packaging sequence of parts to be mounted on a substrate placed on a table in a packaging machine and displacing the table relative to parts holding means at a plurality of times so that the parts are mounted at every displacement of the table in a plurality of designated positions, said method comprising the steps of:

determining a displacing sequence and an amount of displacement of the table to satisfy a constraint concerning the packaging sequence of parts and to minimize a total amount of displacement of the table; and

grouping parts that are to be successively mounted on the substrate at each of the designated positions on the table being displaced relative to the parts holding means.

2. A method according to claim 1, wherein when determining the packaging sequence in which the parts of one group are mounted on the substrate, in a minimum amount of time, a packaging standby time between the mounting of each part and the mounting of the next part machine, and a minimum total packaging time is determined.

3. A method according to claim 1, further comprising the steps of:

determining, after said grouping step, a range of use from which the parts of each group are to be supplied;

determining an arrangement of the parts within the range of use of each group; and

determining the packaging sequence of each group based on the determined arrangement of the parts.

4. A method of determining a packaging sequence of parts to be mounted on a substrate placed on a table in a packaging machine and turning the table at a plurality of times so that the parts are mounted at every turn of the table in a plurality of designated positions, said method comprising the steps of:

determining an angle and a direction of a turn of the table and a turning sequence of the table to satisfy a constraint concerning the packaging sequence of parts and to minimize a total amount of turning of the table; and

grouping parts that are to be successively mounted on the substrate at each of the designated positions on the table.

5. A method according to claim 4, wherein when determining the packaging sequence in which the parts of one group are mounted on the substrate in a minimum amount of time, a packaging standby time between the mounting of each part and the mounting of the next part within the same group is calculated according to the operation of the packaging machine, and a minimum total packaging time is determined.

6. A method according to claim 4, further comprising the steps of:

determining, after said grouping step, a range of use from which the parts of each group are to be supplied;

determining an arrangement of the parts within the range of use of each group; and

determining the packaging sequence of each group based on the determined arrangement of the parts.

7. A method of determining a packaging sequence of parts to be mounted on a substrate placed on a table in a packaging machine and moving the table at a plurality of times so that the parts are mounted at every movement of the table in a plurality of designated positions, said method comprising the steps of:

segmenting a movable speed of the table to determine a speed and a moving sequence for moving the table to satisfy a constraint concerning the packaging sequence of parts and to optimize the movable speed of the table after the parts are mounted on the substrate, the movable speed being predetermined for each of the parts, and

grouping parts having the same speed segment.

8. A method according to claim 7, wherein the moving speed of the table is segmented based on the moving speed of the parts to be mounted by the packaging machine and the moving speed of the parts that have already been mounted by another packaging machine.

9. A method according to claim 7, wherein when determining the packaging sequence in which the parts of one group are mounted on the substrate in a minimum amount of time, a packaging standby time between the mounting of each part and the mounting of the next part within the same group is calculated according to the operation of the packaging machine, and a minimum total packaging time is determined.

10. A method according to claim 7, further comprising the steps of:

determining, after said grouping step, a range of use from which the parts of each group are to be supplied;

determining an arrangement of the parts within the range of use of each group; and

determining the packaging sequence of each group based on the determined arrangement of the parts.

11. A method of determining a packaging sequence of parts to be mounted on a substrate in a packaging machine, wherein the parts are mounted in a plurality of designated positions, the packaging machine having a rotary index which picks up and holds the parts to carry them to the designated positions on the substrate, said method comprising the steps of:

segmenting a movable speed of the rotary index to determine a speed segment and a turning sequence to turn the rotary index to satisfy a constraint concerning the packaging sequence of parts and to optimize the movable speed of the rotary index, the movable speed being a predetermined speed for each of the parts at which the rotary index is capable of turning and holding the parts; and

grouping parts having the same speed segment and the same turning sequence.

12. A method according to claim 11, further comprising the steps of:

determining, after said grouping step, a range of use from which the parts of each group are to be supplied;

determining an arrangement of the parts within the range of use of each group; and

determining the packaging sequence of each group based on the determined arrangement of the parts.

13. A method according to claim 11, wherein when determining the packaging sequence in which the parts of one group are mounted on the substrate in a minimum amount of time, a packaging standby time between the mounting of each part and the mounting of the next part within the same group is calculated according to the operation of the packaging machine, and a minimum total packaging time is determined.

14. A method of determining a packaging sequence of parts to be mounted on a substrate in a packaging machine, wherein the parts are mounted in a plurality of designated positions, said packaging machine having parts holding means including parts holding portions changeable according to parts to be held, said method comprising the steps of:

determining an exchange sequence for changing the parts holding portions to satisfy a constraint concerning the packaging sequence of parts and so as to optimize a number of exchanges of the parts holding portions; and

grouping parts that require the same parts holding portions and the same exchanging sequence.

15. A method according to claim 14, wherein when determining the packaging sequence in which the parts of one group are mounted on the substrate in a minimum amount of time, a packaging standby time between the mounting of each part and the mounting of the next part within the same group is calculated according to the operation of the packaging machine, and a minimum total packaging time is determined.

16. A method according to claim 14, further comprising the steps of:

determining, after said grouping step, a range of use from which the parts of each group are to be supplied;

determining an arrangement of the parts within the range of use of each group; and

determining the packaging sequence of each group based on the determined arrangement of the parts.

17. A method of determining a packaging sequence of parts to be mounted on a substrate placed on a table in a packaging machine, wherein the parts are mounted in a plurality of designated positions, said method comprising the steps of:

segmenting a movable speed of the table to determine a speed segment and a moving sequence for moving the table based on a constraint concerning the packaging sequence of parts and an allowable moving speed for each part when mounted; and

grouping parts having the same speed segment.

18. A method according to claim 17, wherein when determining the packaging sequence in which the parts of one group are mounted on the substrate in a minimum amount of time, a packaging standby time between the mounting of each part and the mounting of the next part within the same group is calculated according to the operation of the packaging machine, and a minimum total packaging time is determined.

19. A method according to claim 17, further comprising the steps of:

determining, after said grouping step, a range of use from which the parts of each group are to be supplied;

determining an arrangement of the parts within the range of use of each group; and

determining the packaging sequence of each group based on the determined arrangement of the parts.

20. A method of determining a packaging sequence of parts to be mounted on a substrate in a packaging machine, wherein the parts are mounted in a plurality of designated positions, the packaging machine having a rotary index which picks up and holds parts to carry them to the designated positions on the substrate, said method comprising the steps of:

segmenting a movable speed of the rotary index to determine a speed segment and turning sequence to turn the rotary index based on a constraint concerning the packaging sequence of the parts and a turning speed of the rotary index when the parts are attached to the rotary index; and

grouping parts having the same speed segment and the same turning sequence.

21. A method according to claim 20, wherein when determining the packaging sequence in which the parts of one group are mounted on the substrate in a minimum amount of time, a packaging standby time between the mounting of each part and the mounting of the next part within the same group is calculated according to the operation of the packaging machine, and a minimum total packaging time is determined.

22. A method according to claim 20, further comprising the steps of:

determining, after said grouping step, a range of use from which the parts of each group are to be supplied;

determining an arrangement of the parts within the range of use of each group; and

determining the packaging sequence of each group based on the determined arrangement of the parts.

23. A method of determining a packaging sequence of parts on a substrate in a plurality of packaging machines, wherein the parts are mounted on the substrate in a plurality of designated positions, said method comprising the steps of:

(a) selecting one or more of the following steps;

(i) placing the substrate on a turning table, determining an angle and a direction of turning of the table at each turn and a turning sequence of the table to satisfy a constraint concerning the packaging sequence and to optimize a total amount of turn of the table when the table turns at a plurality of times to mount the parts at every turn in predetermined positions and grouping parts that are to be successively mounted on the substrate at each oaf the designated positions,

(ii) placing the substrate on a moving table, segmenting a movable speed to determine a speed segment and moving sequence for moving the table to satisfy a constraint concerning the packaging sequence of the parts and to optimize the movable speed of the table after the parts are mounted on the substrate when mounting the parts on the substrate, the movable speed being predetermined for each of the parts and grouping parts that pertain to the same speed segment,

(iii) segmenting, when the parts are mounted with the packaging machines each having a rotary index, a movable speed of the rotary index to determine a speed segment and a turning sequence for turning the rotary index to satisfy a constraint concerning the packaging sequence and to optimize the turnable speed of the rotary index and the grouping parts that pertain to the same turning sequence and the same speed segment,

(iv) determining, when the parts are mounted with the packaging machines each having parts holding means including parts holding portions changeable according to parts to be held, an exchanging sequence for exchanging the parts holding portions to satisfying a constraint concerning the packaging sequence of the parts and to minimize a number of exchanges of the parts holding portions, and grouping the parts that pertain to the same parts holding portions in the same exchanging sequence; and

(b) determining a packaging sequence in which parts of one group are mounted on the substrate in a minimum amount of time.