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EP0084568A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Iron core laminate manufacturing apparatus

Assignee: Panasonic Holdings Corp
•
Filing: 1981-03-31
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Granted: —
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Expires: 2001-03-31
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Abstract

Abstract An iron core laminate manufacturing apparatus which laminates utilizing the mutual caulking function of laminating projections (11) provided on an iron core board (1), and sets the thickness of the laminated product by the intermittent punch-out control of these projecting parts, characterized in that said apparatus is composed of a marking device (13) which selectively attaches marks (14) beside the parts to be punched of the iron core board (1); a proximity sensor (15) which detects the marks (14); a means (6) for generating a timing signal for each lamination; a means (21) to establish the lamination dimension; an intermittent punching device (9) which controls.,the formation of said projections; and a control device (17), said device calculating lamination thickness from information about the position of said sensor and the measured value obtained when said proximity sensor (15) detected the iron core board (1) provided with said mark (14), calculating then the average thickness of one lamination by dividing said lamination thickness by the number of laminations, totalling said average thickness with each timing signal, and controlling the action of said punching device when this total value exceeds the predetermined value.

Inventors

  • 👤 Yoshihumi Hara
  • 👤 Hiroji Takano
  • 👤 Shoshi Kabashima
  • 👤 Mikio Hasegawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 17:54
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/22; H; H01; H01F; H01F41/00; H01F41/02; H01F41/0206; H01F41/0233; H02; H02K; H02K15/00; H02K15/02; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5136; Y10T29/5137; Y10T29/5138; Y10T29/5197; Y10T29/53; Y10T29/5313; Y10T29/53143; Y10T29/53161; Y10T29/5317

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 271 words
A laminated core producing apparatus wherein a projection is formed on part of-a core sheet and such core sheets are laminated by making use of the mutual fitting and crimpring action of the projections, the thickness of the laminated core product being determined by controlling the intermittent punching for said projection, said apparatus comprising a marking mechanism for selectively marking the lateral side of a portion of the core sheet to be punched out, a proximity sensor provided in a metal die for producing a signal corresponding to the proximity distance of the marked core sheet in the process of production, means for generating a timing signal each time said production apparatus places one core sheet, means for presetting the target value of lamination thickness of the core product, memory means for storing information about the position of said proximity sensor, an intermittent punching mechanism capable of electrically controlling the decision of whether or not to form said projection, and a control device whereby, with the count of said timing signals after actuation of said marking mechanism being taken to be the number of sheets in lamination, the lamination thickness calculated from the information provided by the proximity sensor detecting said marked core sheet and -rom the information about the position of said proximity sensor is divided by said number of sheets in lamination to find the average thickness of one core sheet and the values of such average thickness are added up to provide a cumulative value for each said timing signal so as to control the operation of said punching mechanism when said cumulative value exceeds said target value.
Claim 2
Dependent Claim 271 words
A laminated core producing apparatus wherein a projection is formed on part of-a core sheet and such core sheets are laminated by making use of the mutual fitting and crimpring action of the projections, the thickness of the laminated core product being determined by controlling the intermittent punching for said projection, said apparatus comprising a marking mechanism for selectively marking the lateral side of a portion of the core sheet to be punched out, a proximity sensor provided in a metal die for producing a signal corresponding to the proximity distance of the marked core sheet in the process of production, means for generating a timing signal each time said production apparatus places one core sheet, means for presetting the target value of lamination thickness of the core product, memory means for storing information about the position of said proximity sensor, an intermittent punching mechanism capable of electrically controlling the decision of whether or not to form said projection, and a control device whereby, with the count of said timing signals after actuation of said marking mechanism being taken to be the number of sheets in lamination, the lamination thickness calculated from the information provided by the proximity sensor detecting said marked core sheet and -rom the information about the position of said proximity sensor is divided by said number of sheets in lamination to find the average thickness of one core sheet and the values of such average thickness are added up to provide a cumulative value for each said timing signal so as to control the operation of said punching mechanism when said cumulative value exceeds said target value.
Claim 3
Dependent Claim 25 words
A laminated core producing apparatus as set forth in Claim 1, characterized in that said proximity sensor is fixed at a plurality of predetermined positions.
Claim 4
Dependent Claim 25 words
A laminated core producing apparatus as set forth in Claim 1, characterized in that said proximity sensor is movable between a plurality of predetermined positions.
Claim 5
Dependent Claim 79 words
A laminated core producing apparatus as set forth in Claim 1, characterized in that said mark hole is in the form of a notch in the portion of the core sheet which is in contact with the metal die and said proximity sensor has an air spout port and an air exhaust port provided on the inner surface of the metal die contacting with the core sheet, the rate of flow of air through said spout port being detected.

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