US4025764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi pass machining with control of feed increments
Assignee: Individual
•
Filing: 1976-03-17
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Granted: 1977-05-24
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Expires: 1996-03-17
Abstract
Abstract In a machine tool control system of the type wherein repeated machining passes are effected with progressively reducing increments of in-feed, each increment is stored, e.g. digitally, and is iteratively combined with a modifying constant to form the new, reduced feed increment for the next machining pass, preferably by multiplying the increment by a modifying constant less than unity.
Inventors
- 👤 Alfred Tack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:26
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/013; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/10159; Y10T82/00; Y10T82/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
In a machine tool control system of the type wherein repeated machining passes are effected with progressively reducing increments of in-feed, the improvement comprising means for storing the current feed increment, means for storing a modifying constant, and computing means operative to form a predetermined mathematical combination of the stored feed increment and modifying constant such as to form a new, smaller feed increment, and to replace the stored current feed increment by the new feed increment to form the current feed increment for a successive machining pass.
Claim 2
Dependent Claim
88 words
In a machine tool control system of the type wherein repeated machining passes are effected with progressively reducing increments of in-feed, the improvement comprising means for storing the current feed increment, means for storing a modifying constant, and computing means operative to form a predetermined mathematical combination of the stored feed increment and modifying constant such as to form a new, smaller feed increment, and to replace the stored current feed increment by the new feed increment to form the current feed increment for a successive machining pass.
Claim 3
Dependent Claim
37 words
The invention of claim 1, wherein the stored modifying constant is less than unity and the computing arrangement comprises a multiplier for multiplying the stored feed increment by the modifying constant to form the new feed increment.
Claim 4
Dependent Claim
24 words
The invention of claim 1, further comprising a total feed store and means for decrementing the total feed store by each new feed increment.
Claim 5
Dependent Claim
24 words
The invention according to claim 1, further comprising a pulse generator circuit for generating a number of feed pulses corresponding to each feed increment.
Claim 6
Dependent Claim
32 words
The invention according to claim 4, further comprising a pulse rate multiplier multiplying the rate of the feed pulses by a selected factor to provide feed pulses for a second machine axis.
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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |