Patent US5317802A successfully refreshed from Google Patents.
US5317802A
Expired / Lapsed
US
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Method for loading a printed circuit board mounting line
Assignee: Mitsubishi Electric Corp
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Filing: 1992-06-22
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Granted: 1994-06-07
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Expires: 2012-06-22
Abstract
Abstract A line is constructed of multi-function machines which can mount various types of parts or by connecting a plurality of dedicated machines of the same type which can mount only a specific type of part, data is extracted from parts mounting information which is different by each printed circuit board (extraction process 10), the mounting tact time of each automatic machine which is changed by type and the number of parts to be mounted is calculated (load calculation process 20), parts are transferred from an automatic machine having a large load to an automatic machine having a small load to equalize the mounting tact time of each automatic machine (alteration process 30), and NC data for each automatic machine is automatically generated (decision process 40), whereby the productivity of mounting parts on printed circuit boards can be improved.
Inventors
- 👤 Nobuhiro Jyoko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:10
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/418; G05B19/41805; H; H05; H05K; H05K13/00; H05K13/08; H05K13/085; Y; Y02; Y02P; Y02P90/00; Y02P90/02; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/51; Y10T29/5136; Y10T29/5137; Y10T29/53; Y10T29/5313; Y10T29/53174; Y10T29/53178
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
A method of loading a printed circuit board mounting line having a plurality of parts mounters, each mounter capable of mounting parts onto a printed circuit board, comprising the steps of: (a) extracting, from a memory, parts mounting data; (b) calculating a tact time for each parts mounter using said parts mounting data; (c) modifying said parts mounting data by reassigning parts to different parts mounters to improve tact time balance; and (d) loading parts into said parts mounters in accordance with said parts mounting data when tact time balance falls within a predetermined range.
Claim 2
Independent Claim
95 words
A method of loading a printed circuit board mounting line having a plurality of parts mounters, each mounter capable of mounting parts onto a printed circuit board, comprising the steps of: (a) extracting, from a memory, parts mounting data; (b) calculating a tact time for each parts mounter using said parts mounting data; (c) modifying said parts mounting data by reassigning parts to different parts mounters to improve tact time balance; and (d) loading parts into said parts mounters in accordance with said parts mounting data when tact time balance falls within a predetermined range.
Claim 3
Dependent Claim
21 words
A method according to claim 1, wherein each parts mounter is a multi-function machine which can mount various types of parts.
Claim 4
Dependent Claim
36 words
A method according to claim 1, wherein each parts mounter is a dedicated machine which can mount only a specific type of part, and a plurality of said dedicated machines of the same type are connected.
Claim 5
Dependent Claim
32 words
A method according to claim 1, wherein the type and the number of parts to be mounted on a printed circuit board may differ from one printed circuit board to the next.
Claim 6
Dependent Claim
19 words
A method according to claim 1, wherein said plurality of parts mounters includes at least one multi-function parts mounter.
Claim 7
Dependent Claim
19 words
A method according to claim 1, wherein said plurality of parts mounters includes at least one dedicated parts mounter.
Claim 8
Independent Claim
139 words
A method of a loading a printed circuit board mounting line having a plurality of parts mounters, each mounter capable of mounting parts onto a printed circuit board, comprising the steps of: (a) retrieving, from a memory, parts mounting data, including parts mounting data for every part to be mounted on a given printed circuit board; (b) using said parts mounting data to calculate a tact time for each of said mounters; (c) using said parts mounting data and said tact times to modify said parts mounting data by reassigning a given part from one mounter to another mounter, in accordance with a formula designed to better balance said line; and (d) loading a given part into a mounter in accordance with parts mounting data associated with said given part, when said line is balanced within a predetermined range.
Claim 9
Independent Claim
139 words
A method of a loading a printed circuit board mounting line having a plurality of parts mounters, each mounter capable of mounting parts onto a printed circuit board, comprising the steps of: (a) retrieving, from a memory, parts mounting data, including parts mounting data for every part to be mounted on a given printed circuit board; (b) using said parts mounting data to calculate a tact time for each of said mounters; (c) using said parts mounting data and said tact times to modify said parts mounting data by reassigning a given part from one mounter to another mounter, in accordance with a formula designed to better balance said line; and (d) loading a given part into a mounter in accordance with parts mounting data associated with said given part, when said line is balanced within a predetermined range.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-06 | 1997-12-06 | 1998-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-06 | 2001-12-06 | 2002-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-06 | 2005-12-06 | 2006-06-07 | $7700.00 | Window Closed / Lapsed |