Patent US3846689A successfully refreshed from Google Patents.
US3846689A
Expired / Lapsed
US
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Method and device for the control of the machining on a machine tool for stock removal
Assignee: Marposs SpA
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Filing: 1973-04-05
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Granted: 1974-11-05
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Expires: 1993-04-05
Abstract
Abstract A method for controlling machining on a machine tool carrying out subsequent cuts for removing stock which includes storing signals representative of the stocks measured after the last and preceding cut, obtaining a difference signal of said signals, comparing the difference signal with a signal representative of the stock still to be removed and controlling the machine tool cycle by means of a signal resulting from the comparison. A device for controlling the machining on a machine tool which includes a first memory unit to sequentially store signals responsive to the values measured by an instrument at every cut, a second memory unit to sequentially store signals responsive to the value measured by the instrument at the preceding cut and a comparison unit to compare a difference signal of the stored signals with a reference signal with the output of the comparison unit being connected to a control unit for the machine cycle.
Inventors
- 👤 M Possati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:23
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/013; B23Q15/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
104 words
A method for controlling machining on a machine tool carrying out subsequent cuts for removing stock from a section of a workpiece, in which the stock of the section being machined is measured after the subsequent cuts and the machine is automatically controlled on the basis of said measurements, comprising the steps of: storing signals representative of the stocks measured after the last and the preceding cut, obtaining the difference signal of said signals, comparing said difference signal with a signal representative of the stock still to be removed, and controlling the machine tool cycle by means of a signal resulting from said comparison.
Claim 2
Independent Claim
104 words
A method for controlling machining on a machine tool carrying out subsequent cuts for removing stock from a section of a workpiece, in which the stock of the section being machined is measured after the subsequent cuts and the machine is automatically controlled on the basis of said measurements, comprising the steps of: storing signals representative of the stocks measured after the last and the preceding cut, obtaining the difference signal of said signals, comparing said difference signal with a signal representative of the stock still to be removed, and controlling the machine tool cycle by means of a signal resulting from said comparison.
Claim 3
Dependent Claim
37 words
The method according to claim 1, wherein said controlling step comprises stopping the machining as soon as a signal representative of double the value of the stock still to be removed is lower than said difference signal.
Claim 4
Dependent Claim
43 words
The method of claim 1, wherein said comparing step comprises obtaining a triggering signal as soon as said signal representative of the stock still to be removed is lower than a signal representing the difference between the penultimate and the last stock measured.
Claim 5
Dependent Claim
37 words
The method of claim 3, wherein said controlling step comprises controlling, by said triggering signal, feed of the tool, said feed being regulated on the basis of the signal representative of the stock still to be removed.
Claim 6
Independent Claim
149 words
A method for the controlling of machining on a machine tool carrying out subsequent cuts for removing stock from a section of a workpiece, in which the stock of the section being machined is measured after subsequent cuts and the machine is automatically controlled on the basis of said measurements, comprising the steps of: storing signals representative of the stocks measured after subsequent cuts, obtaining a signal representing the depths of the quantities of stock removed by subsequent cuts, obtaining a signal representing the depth of the stock quantity the machine would remove by the next cut, said evaluation being carried out on the basis of said stored signals and obtained depth signal, comparing the signal representing the stock measured after the last cut with said obtained signal representing the depth of the stock quantity the machine would remove, and controlling the machining on the basis of said comparison.
Claim 7
Independent Claim
149 words
A method for the controlling of machining on a machine tool carrying out subsequent cuts for removing stock from a section of a workpiece, in which the stock of the section being machined is measured after subsequent cuts and the machine is automatically controlled on the basis of said measurements, comprising the steps of: storing signals representative of the stocks measured after subsequent cuts, obtaining a signal representing the depths of the quantities of stock removed by subsequent cuts, obtaining a signal representing the depth of the stock quantity the machine would remove by the next cut, said evaluation being carried out on the basis of said stored signals and obtained depth signal, comparing the signal representing the stock measured after the last cut with said obtained signal representing the depth of the stock quantity the machine would remove, and controlling the machining on the basis of said comparison.
Claim 8
Dependent Claim
51 words
The method of claim 5, wherein said controlling step comprises stopping the machining as soon as a signal representative of double the value of the stock still to be removed is lower than said obtained signal representing the depth of the stock quantity the machine would remove by the next cut.
Claim 9
Dependent Claim
47 words
The method of claim 5, wherein said comparing step comprises obtaining a triggering signal as soon as said signal representing the stock still to be removed is lower than said obtained signal representing the depth of the stock quantity the machine would remove by the next cut.
Claim 10
Dependent Claim
35 words
The method of claim 7, wherein said controlling step comprises controlling, by said triggering signal, a feed of the tool regulated on the basis of the signal representative of the stock still to be removed.
Claim 11
Dependent Claim
105 words
Device for controlling the machining on a machine tool carrying out subsequent cuts for removing stock from a section of a workpiece, a measuring instrument beIng provided for the size gauging of the section being machined, the device comprising first memory means to sequentially store signals responsive to the values measured by the instrument at every cut, second memory means to sequentially store signals responsive to the value measured by the instrument at the preceding cut and means to compare a difference signal of said stored signals with a reference signal, the output of said comparison means being connected to means controlling the machine cycle.
Claim 12
Dependent Claim
105 words
Device for controlling the machining on a machine tool carrying out subsequent cuts for removing stock from a section of a workpiece, a measuring instrument beIng provided for the size gauging of the section being machined, the device comprising first memory means to sequentially store signals responsive to the values measured by the instrument at every cut, second memory means to sequentially store signals responsive to the value measured by the instrument at the preceding cut and means to compare a difference signal of said stored signals with a reference signal, the output of said comparison means being connected to means controlling the machine cycle.
Claim 13
Dependent Claim
25 words
The device of claim 9, wherein further memory means are provided to sequentially store signals responsive to other preceding values measured by the measuring instrument.
Claim 14
Dependent Claim
48 words
The device according to claim 10, wherein said first, second and further memory means are connected to a comparison circuit, said comparison circuit controlling switch means adapted to connect said first memory means with the control group of a motor for regulating the final feed of the tool.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |