US3220568A - Lamination stacking apparatus - Google Patents

Lamination stacking apparatus Download PDF

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Publication number
US3220568A
US3220568A US265787A US26578763A US3220568A US 3220568 A US3220568 A US 3220568A US 265787 A US265787 A US 265787A US 26578763 A US26578763 A US 26578763A US 3220568 A US3220568 A US 3220568A
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United States
Prior art keywords
lamination
jaws
assembly
transfer
holding
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Expired - Lifetime
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US265787A
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English (en)
Inventor
Donald K Voyce
Marshall K Hamson
Lawrence R Sweetser
Everett E Bates
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GTE Sylvania Inc
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Sylvania Electric Products Inc
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Priority to US265787A priority Critical patent/US3220568A/en
Priority to BE645292D priority patent/BE645292A/xx
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • H01F41/024—Manufacturing of magnetic circuits made from deformed sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/5317—Laminated device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53961—Means to assemble or disassemble with work-holder for assembly
    • Y10T29/53974—Means to assemble or disassemble with work-holder for assembly having means to permit support movement while work is thereon

Definitions

  • One of the principal objects of this invention is to automatically assemble formed inductor core laminations.
  • Another object is to automatically assemble formed inductor core laminations of the C-type.
  • a further object is to provide automatic means for stacking or nesting the laminations formed in accordance with the teachings of the referenced co-pending application.
  • a lamination stacking apparatus adjacent to the output end of a lamination forming apparatus, the stacking apparatus including a stacking table and a lamination transfer assembly for transferring laminations from the output end of the lamination forming apparatus to the stacking table of the stacking apparatus.
  • the lamination transfer assembly includes reciprocative jaws for effecting this transfer operation.
  • a lamination holding assembly for receiving the laminations from the jaws of the lamination transfer assembly and holding them in proper position on the stacking table during the stacking or nesting operation.
  • each lamination being stacked or nested on the stacking table differs from the preceding one in increments which are a function of the thickness of the stock
  • means are provided to compensate therefor by effecting a corresponding displacement of the stacking table, the lamination transfer assembly and the lamination holding assembly after each lamination has been transferred and nested.
  • This means comprises an increment head to which the lamination transfer and holding assemblies are mechanically connected and a platform from which the stacking table is indirectly supported and on which the increment head rides.
  • Means are provided for displacing the increment head horizontally and vertically a distance equal to the thickness of the stock after each lamination has been transferred to the stacking table.
  • the lamination stacking apparatus of this Sttes Patent invention includes means for automatically regulating the length of the forward stroke of the transfer jaws to make sure they pick up a lamination each time at the aforementioned alternating loci.
  • FIGURE 1 is a side elevational view of the lamination stacking apparatus.
  • FIGURE 2 is a front elevational view of the lamination stacking apparatus taken along the line 22 of FIGURE 1.
  • FIGURE 3 is a plan view of the lamination stacking apparatus taken along the lines 33 of FIGURE 2.
  • FIGURE 4 is a side elevational view of the lamination stacking apparatus on an enlarged scale and partly in section, taken along the lines 4-4 of FIGURE 2.
  • FIGURES 5 and 6 are enlarged fragmentary details of the lamination stacking apparatus illustrating particularly the relative displacement of several of the major components thereof during the stacking or nesting of a plurality of laminations.
  • FIGURE 7 is an enlarged end elevational view of the stroke adjustment assembly associated with the lamination transfer assembly, and taken along the line 7-7 of FIG- URE 1.
  • FIGURE 8 is a side elevational view of the stroke adjustment assembly of FIGURE 7.
  • FIGURE 9 is an enlarged cross-sectional detail taken along the line 99 of FIGURE 1, illustrating the ball screw shaft stop arm and associated parts.
  • FIGURE 10 is an enlarged perspective detail illustrat ing the mechanical connection of the stop arm to the increment head.
  • FIGURE 11 is an enlarged cross-sectional detail taken along the line 11-11 of FIGURE 1, illustrating the ball screw drive assembly.
  • FIGURE 12 is a front elevational view of the ball screw drive assembly of FIGURE 11.
  • FIGURE 13 is a side elevational detail of the core discharge assembly.
  • FIG. 1 the automatic lamination stacker of this invention is organized about a table 10 which is shown in phantom in FIG. 1.
  • a bracket 12 is supported on the table 10 and defines a framework on which an increment head assembly 20 is supported. It will be noted from an examination of FIG. 1 that the increment head assembly 29 is disposed at an angle of 45 with respect to the table 10.
  • the main working component of the increment head assembly 20 is the increment head 24.
  • the increment head 24 is provided with a projection 26 which defines a bearing block through which increment head support shaft 28 extends.
  • the shaft 28 is supported in pillow blocks 30 mounted on the base 22.
  • the increment head 24 is a casting, machined to receive a ball screw 32.
  • the shaft 33 of the ball screw 32 extends along the base 22 and terminates in a coupling 34 which connects it to a torque motor 36.
  • the torque motor 36 is secured to a support bracket 38 mounted on the base 22.
  • the ball screw 32 and shaft 33 are supported by a bearing bracket 40 mounted on the base 22.
  • the ball screw 32 is driven by a piston 42 through a one-way clutch 44 on the shaft 33 of the ball screw 32.
  • a stop arm 46 is mounted on the shaft 33 of the ball screw 32 between an electrical clutch coupling 48 and a brake 50.
  • FIGS. ll and 12 The details of the drive connection between piston 42 and the ball screw shaft 33 are shown in FIGS. ll and 12.
  • the piston 42 is supported in a bracket 41 on the base 22.
  • Piston rod 43 of piston 42 has a plunger 45 fitted on the end thereof as shown particularly in FIG. 11.
  • a collar 47 keyed to the clutch 44 which is in turn keyed to the ball screw shaft 33, has a drive pin 49 fitted in an ear 47a thereof.
  • Drive pin 49 rides in an elongated slot 45a in plunger 45.
  • the length of the stroke of the plunger 45 and hence the degree of rotation of the ball screw shaft 33 is controlled by an adjustable stop 37 which extends through bracket 39 attached to base 22.
  • the degree of rotation of the ball screw assembly may be adjusted by resetting the adjustable stop 37.
  • the piston 42 periodically actuates the ball screw shaft through the one-way clutch 44 to impart a slight rotational movement thereto.
  • Each increment of rotational movement of the ball screw 32 effects a corresponding displacement of the increment head 24 downward and forward.
  • the number of increments in any given operating cycle is predetermined so that, upon completion of the operating cycle, the torque motor 36 can reset the ball screw 32 back to zero or its normal rest position.
  • the brake 50 is released and the electrical clutch coupling 48 is demagnetized.
  • the stop arm 46 on the ball screw shaft 33 is also returned to its normal rest position.
  • FIGS. 9 and 10 The control mechanism associated with the stop arm 46, and the ball screw shaft 33 on which it is mounted, to insure the accurate return of the ball screw assembly to its normal rest position is illustrated in detail in FIGS. 9 and 10.
  • the stop arm 46 in its normal rest position abuts a stop block 51 pivotally mounted at 52 on the base 22.
  • An electrical switch 53 is mounted on the underside of the stop block 51 and its actuating button 54 is normally engaged by a stop screw 55 which extends through the stop arm 46.
  • a push rod 56 extends between the increment head 24 and the stop block 51, the push rod being fixedly connected to the increment head and slidable within the stop block.
  • the push rod 56 has a collar 57 fixedly secured thereto and normally in abutting engagement with the face of the stop block 51 nearer the increment head 24.
  • a tension spring 58 normally loaded in the rest position as shown in FIG. 10, connects the base 22 to the stop block 51 and maintains the stop block 51 in engagement with the collar 57 on the push rod 56.
  • the stop block 51 will have been displaced in a counterclockwise direction sufiiciently to remove it from the path through which the stop arm 46 is being caused to move by the rotation of the ball screw shaft 33 on which it is mounted.
  • the torque motor 36 resets the ball screw assembly upon the completion of an operating cycle of the apparatus.
  • the stop arm 46 rotates in a reverse direction and the push rod 56 through the collar 57 thereon returns the stop block 51 to its normal rest position.
  • the stop block 51 will be lying in the path of the stop arm 46 and prevent further rotation thereof.
  • the stop screw 55 projecting therefrom depresses the actuating button 54 of the electrical switch 53 thereby energizing the switch.
  • the switch 53 is electrically connected to the torque motor 36 and thus controls the torque motor and terminates the return of the ball screw assembly.
  • a lamination transfer assembly 60 and a lamination holding assembly 79 are organized about the increment head 24.
  • the lamination transfer assembly 60 (FIG. 4) effects the transfer of laminations from a lamination forming apparatus (such as lamination 28 in FIG. 12 of Biggs et al., 3,096,805) to a lamination stacking table 80.
  • the lamination holding assembly 70 receives the individual laminations from the transfer assembly 60 and holds them in position on the stacking table during the lamination stacking operation.
  • the increment head 24 is machined to define a chamber therein for a double-ended air piston 62 having a forward piston rod 64 and a rearward piston rod 66.
  • a pair of depending projections of the increment head 24 define bearing blocks 68 for supporting a shaft 72 which extends therethrough.
  • a switch actuator arm 71 is mounted on the shaft 72 between the two bearing blocks 68 and is engageable with a switch 73 mounted on one of these bearing blocks 68 as shown in FIG. 1.
  • a connector 74 connects the piston rod 64 to the shaft 72 and thus reciprocation of the forward piston rod 64 also effects reciprocation of the shaft 72.
  • a jaw holder 76 is attached to the front end of shaft 72. The lamination transfer assembly 60 is supported from this jaw holder 76 and will now be described.
  • the jaw holder 76 has a pair of elongated slots 78 formed therein. Outside jaw legs 82 and 84 and center jaw leg 83 are attached to the jaw holder 76 by fasteners 75, the outside legs being adjustably mounted through the elongated slots 78. As shown in FIG. 4, the jaw holder 76 is provided with a projecting tongue 77 which, in cooperation with the grooves formed in each of the jaw legs, permits the jaw legs to be adjustably displaced laterally on the jaw holder 76.
  • outside jaws 86 and 88 are each provided with dowel pins and 92 respectively, the dowel pins eing press-fitted within their respective jaws to thus provide a means for pivotally supporting the jaws 86 and 88 from the jaw legs 82 and 84 respectively.
  • each dowel pin extends through and is rotatable within a boss provided therefor in its corresponding jaw leg, the upper end of each dowel pin being provided with a collar 94.
  • a pair of center jaws 87 and 89 (FIGS. 2 and 3) are in cooperative relationship with respect to outside jaws 86 and 88 respectively.
  • the center jaw 87 has a dowel pin 91 press-fitted therein and the other center jaw 89 is supported thereon.
  • the dowel pin 91 extends through and is rotatable within a bore provided therefor in the center jaw leg 83 and the upper end of this dowel pin is provided with a collar 93.
  • a jaw stop in the form of a plate 96 is attached to the lower extremity of each of the outside jaw legs 82 and 84.
  • a stop screw 98 extends through each of these jaw stops and abuts the tail of the adjacent jaw.
  • a spring 100 connects the tail of the outside jaw and the jaw stop 96 to maintain the tail of the jaw normally abutting the end of the stop screw 98.
  • a compression spring 102 spans the space between the center jaws 87 and 89 and is seated in pockets provided therefor in these two members.
  • the lamination holding assembly 70 will now be described, reference being made primarily to FIGS. 1-4.
  • the lamination holding assembly 70 receives and holds laminations delivered to it by the lamination transfer assembly 61 just described.
  • the lamination holding assembly 70 is organized about a base plate 129 secured to the bottom of increment head 24 as shown particularly in FIGS. 2 and 4.
  • the base plate 129 is provided at its ends with rollers 122, the function and purpose of which will be described below.
  • the top face of the base plate 120 is machined to define a tongue or fin 121, which, in combination with a locking bar 124 which extends across and is secured to the top rear surface of the base plate 120 by screws 126, defines a channel or groove for accurately positioning and securing the base plate 120 to the bottom of the increment head 24.
  • each jaw and piston bracket is a substantially L-shaped member having a jaw supported from one leg thereof and an air cylinder supported from the other leg thereof, both of which will be described in detail below.
  • the outside jaws 132 and 135 are pivotally supported from their respective brackets 127 and 129.
  • the center holding jaws 133 and 134 are pivotally supported by their respective dowel pins 136 on the center bracket 128 as shown particularly in FIG. 3.
  • Each dowel pin 136 has a collar 138 secured to the top thereof to retain its associated jaw in its associated bracket.
  • Air cylinders 14% and 142 are secured to the outside jaw and piston brackets 127 and 129 respectively as shown particularly in FIGS. 3 and 4 and air cylinder 141 is secured to the center jaw and piston bracket 128.
  • Jaw openers 144 and 146 are secured to the forward end of air cylinders 14% and 142 respectively.
  • Each of these jaw openers 144 and 146 is a plate-like member having a pin 144a and 146a respectively upstanding on a face thereof. As shown particularly in FIG. 3, these pins 144:: and 146a normally engage an inclined face of the tail of holding jaws 132 and 135 respectively.
  • each of the jaws 132 and 135 is returned to its normal closed position by a spring 148, one end of which is connected to the tail of the jaw and the other end being connected to a screw 158 fitted in the corresponding jaw and piston bracket.
  • the center air cylinder 141 is supported by the center jaw and piston bracket 128.
  • a switch 143 is mounted on a switch arm 145 attached to air cylinder 141.
  • a switch-actuating finger 147 is mounted on switch 143, overlies switch button 149 and abuts collar 151 on air cylinder piston 1411!.
  • the center air cylinder 141 is provided with a jaw opener in the form of a knob 152 which is in engagement with the inclined faces of the tails of the middle holding jaws 133 and 134.
  • the jaw opener of knob 152 will displace the center holding jaws 133 and 134 and cause them to open, pivoting on their respective dowel pins 136.
  • compression spring 154 located directly below compression spring 102 in FIG. 3, spans the center jaws 133 and 134 and is seated in pockets therein. This spring 154 effects the return of the center holding jaws 133 and 134 to their normally closed position with respect to their corresponding outside jaws 132 and 135 respectively, when the air cylinder piston is retracted and the jaw opener 152 is returned to its normal rest position as shown in FIG. 3.
  • a lamination transfer assembly 60 and a lamination holding assembly 7% are organized about the increment head 24 and a lamination stacking table receives and supports the laminations during the stacking operation.
  • the lamination transfer assembly 60 is organized about a jaw holder 76 on shaft 72 which is reciprocatively supported in the increment head 24.
  • the lamination holding assembly 70 is organized about a base plate 126 which is secured to and depends from the increment head 24.
  • the increment head 24 is supported through bearing block 26 on support shaft 28.
  • the base plate is provided with rollers 122.
  • the rollers 122 ride on bearing surfaces provided therefor on a platform 160.
  • This platform 16%) has a pair of support rods 162 and 164 secured thereto and depending therefrom. These support rods 162 and 164 extend through and are slidable within guide brackets 166 and 168 which are in turn secured to a suitable stationary member.
  • the support rods 162 and 164 are provided at their lower extremities with spring pins 170.
  • a compression spring 172 connects each of the spring pins to the guide bracket 168.
  • the lamination stacking table 89 has a pair of table supports 174 and 176 secured to the lower face thereof and mounted on a shaft 178 which extends therebetween.
  • the table support 174 is a substantially L-shaped member having a spring pin 181B projecting from one leg thereof and having a stop screw 182 extending through the other leg thereof.
  • One end of shaft 178 extends through and is rotatable in the boss portion 184 of bracket 186.
  • a spring pin 188 mounted on a face of bracket 186, supports one end of a spring 198, the other end of the spring being connected to the spring pin 18!). As shown in FIG.
  • the bracket 186 is provided with an elongated slot 192 for adjustably supporting the bracket 186 on a bushing block 194 which is slidable on guide rod 162.
  • a double-action air piston 196 is supported by and depends from a bracket 198 attached to the platform 160 as shown in FIG. 2.
  • Piston rod 260 projecting from piston 196 extends into and is secured to the lateral projection of bushing block 194.
  • the guide rod 264 is mounted on a guide rod arm 206 which is secured to support rod 162.
  • FIGS. and 6 are enlarged fragmentary details in side elevation of the platform 160 and associated parts including particularly the increment head 24, the lamination stacking table 80 and portions of the lamination transfer assembly 60 and the lamination holding assembly 70.
  • the increment head assembly 29 is disposed at an angle of 45 to the horizontal.
  • the ball screw shaft 33 was periodically actuated by the piston 42 to impart a slight rotational movement thereto and thus effect a corresponding displacement of the increment head 24 downward and forward or to right as viewed in FIG. 1.
  • the number of increments of displacement in any given operating cycle was predetermined. The purpose and significance of these increments of displacement of the increment head 24 is illustrated in FIG. 5 and 6.
  • Each increment of rotational movement of the ball screw 32 displaces the increment head 24 in both a horizontal and a vertical plane equal to the thickness of one of the laminations 1 being stacked or nested in order to permit the lamination transfer assembly 60 and the lamination holding assembly 70, particularly the jaws thereof to perform their required operations on each succeeding lamination 1 which is being stacked or nested, engaging them at the same relative location each time even though the laminations being assembled get progressively smaller during the operating cycle.
  • the increment head 24, riding on the platform 160 through rollers 122 displaces the platform 160 downwardly, the lamination transfer assembly 60 and the lamination holding assembly 70 downwardly and to the right as viewed in FIGS.
  • FIG. 5 and 6 The relative disposition of these apparatus components after one lamination 1 has been positioned on the stacking table 80 is shown in FIG. 5.
  • FIG. 6 The relative disposition of these same apparatus components after eight laminations have been assembled is shown in FIG. 6; they have been displaced in increments equal to the thickness of each lamination. This relative displacement is illustrated particularly with respect to one of the rollers 122, the FIG. 5 locus thereof being shown in phantom in FIG. 6 and the line A-B illustrating the direction and extent of the displacement.
  • the apparatus of this invention is designed primarily to stack automatically the mating C-type core laminations fabricated automatically on the apparatus disclosed and described in the co-pending application of O. H. Biggs et al., Serial No. 764,588 filed October 1, 1958, now U.S. Patent 3,096,805.
  • each lamination is formed with one leg of the C longer than the other and the laminations are assembled with the long and short legs located alternately on both sides of the C substantially as shown on sheet 1 of the referenced co-pending application and in FIG. 6 of this application.
  • the means employed to effect automatic adjustment of the length of the stroke of the lamination transfer assembly 60 is identified by the general reference number 220 'in FIG. 1.
  • the assembly 220 comprises a switch 222 mounted on a side face of the increment head 24 and an air cylinder 224 associated therewith, both in turn being disposed in cooperative relationship with respect to the rearward piston rod 66 of the double ended air piston 62.
  • the air cylinder 224 is supported on a bracket 226 which is attached to the increment head 24.
  • the piston rod 225 of the air cylinder 224 projects downwardly and freely through the bracket 226 and has a piston rod block 228 secured to the end thereof.
  • the piston rod block 228 has a dowel pin 230 fitted therein and projecting laterally from a side face thereof.
  • a compression spring 232 is supported by and extends between bracket 226 and pin 23%.
  • a spacer plate 234 is supported on the pin 230 which extends through a face thereof.
  • the lower longitudinal edge of the spacer plate 234 is machined to provide a cut-out 235 to provide clearance for the piston rod 66 when the spacer plate 234 is moved downwardly by the air cylinder 224 through its piston rod 225, piston rod block 228 and dowel pin 230.
  • the piston rod block 228 moves within a channel provided therefor by the legs of a substantially U-shaped piston block guide 236.
  • This guide 236 is supported in spaced relationship from the increment head 24 by a spacer block 238.
  • the piston block guide 236 has a pair of pins 240 projecting laterally from the legs thereof and through elongated slots 242 formed in the spacer plate 234. Collars 244 are fitted on the projecting ends of these pins 240. This pin and slot arrangement insures stability of the spacer plate 234 during reciprocation thereof by the air cylinder 224.
  • a piston rod stop 246 is secured to the piston rod 66 near the rearward end thereof.
  • Each leg of the piston block guide 236 has a spring 248 attached thereto and depending therefrom and, as shown in FIG. 8, is normally biased away from engagement with the actuating button 223 of the switch 222.
  • This spring arrangement is provided in order to prevent premature engagement of the button 223 by the spacer plate 234 when it moves from the solid to the phantom position as shown in FIG. 8.
  • the piston rod stop 246 which is mounted thereon will either engage the spring 248 or the spacer plate 234 and, as the forward stroke continues, the actuating button 223 will be depressed within its housing to actuate the switch 222.
  • FIGURE 13 illustrates the manner in which the lamination stacking table 80 is displaced by the piston 196 to discharge therefrom a complete core 3 which comprises a plurality of laminations 1 nested in one another by the apparatus of this invention.
  • the piston 196 is actuated to effect a downward stroke of the piston rod 200.
  • the downward stroke of the piston rod 200 causes the entire table assembly to move downwardly, the bushing block 194 being guided in this downward movement by guide pin 202 which rides in slot 204 in guide rod 204.
  • guide pin 202 which rides in slot 204 in guide rod 204.
  • the free or right hand end of the table 80 as viewed in FIG- URE 13 strikes a post 250 which lies in its path.
  • the post 250 causes the table 80 to tilt, pivoting about the shaft 178, until the table assembly assumes the position shown in phantom in FIG. 13. With the table 80 so tilted, the completed core 3 slides therefrom and along a chute 252 onto conveyor 254.
  • the chute 252 is secured to a chute support 256 mounted on the conveyor support 258.
  • the post 256 is also mounted on the conveyor support 258.
  • a switch 269 is mounted on the conveyor support 258 and the switchactuating arm 262 lies in the path of bushing block 194.
  • the bushing block 194 approaches the end of its downward stroke, it deflects the arm 262 and energizes the switch 260.
  • Energization of switch 26% effects energization of torque motor 36 (FIG. 1) to reset the ball screw assembly.
  • the operating cycle of the lamination forming apparatus comprises a first feed, a first bend, a second feed, a second bend, a third feed and a shear to thereby fabricate a C-type lamination having three legs formed at right angles to one another.
  • a signal goes to the lamination stacking apparatus to initiate an operating cycle thereof as well as to the second bend to effect that operation. More particularly, the signal to the lamination stacking apparatus to initiate an operating cycle thereof goes to the air piston 62 disposed within the increment head 24 (FIG. 1) to actuate it and thus advance the lamination transfer assembly 60 and displace the jaws thereof from the solid to the phantom position as shown in FIG. 4.
  • the second bend and third feed of the lamination forming apparatus has been effected so that the jaws of the transfer assembly are able to engage and grip the formed lamination.
  • the length of the forward stroke of the transfer assembly 69 is regulated by the switch 222 (FIGS. 1, 7 and 8), the forward stroke being terminated when stop 246 on piston rod 66 depresses switch actuating button 223 and thus terminates the compressed air flow to piston 62.
  • This energization of switch 222 also signals the shear mechanism of the lamination forming apparatus and actuates it to thereby complete the fabrication of a three-legged lamination.
  • a switch associated with the shearing mechanism signals the air piston 62 and effects a return of the transfer assembly 68, the jaws thereof carrying a lamination 1 with them across the stacking table 80 (FIGS. 1, 3 and 4).
  • the transfer assembly 60 nears the end of its return stroke, the transfer jaws are deflected sufficiently by strippers 288 (FIG. 3) to open them and release the lamination.
  • the strippers 268 also serve as a stop or fixed bearing surface to insure positive positioning of the lamination on the stacking table 80.
  • the lamination deflects the holding jaws of the lamination holding assembly 78 sufficiently to permit the holding jaws to grip the lamination once it seats against the strippers 208 as shown in FIG. 3.
  • the shaft 72 is connected through connector 74 to piston rod 64 of air piston 62.
  • a switch actuator arm '71 is mounted on the shaft 72 and is disposed in cooperative relationship with respect to a switch 73 mounted on and depending from one of the bearing blocks 68 of the increment head 24.
  • the arm 71 trips the switch 73 and signals air piston 42 to effect actuation thereof.
  • Actuation of air piston 42 effects an increment of rotation of ball screw shaft 33 through the mechanism shown in detail in FIG. 11. As described above, particularly in connection with the description of FIGS.
  • each increment of rotation of the ball screw shaft 33 displaces the increment head 24 through the ball screw 32 downward and forward a distance each equal to the thickness of the strip stock of which the laminations are formed. Since, as described above, the lamination transfer assembly 60 and the lamination holding assembly 70 are connected to and supported from the increment head 24, they are similarly displaced. Since, as described above, the increment head 24 rides on rollers 122 on platform 166, and the lamination stacking table 89 is supported indirectly from the platform 16%, each increment of rotation of the ball screw shaft 33 also causes the stacking table to move downwardly a distance equal to the thickness of the strip stock of which the laminations are formed. The lamination stacking apparatus is now ready to receive a second lamination, smaller in size than the first and which will nest inside the first.
  • the second lamination is formed in a manner similar to the manner in which the first lamination was formed, i.e., the operating cycle comprises a first feed, a first bend, a second feed, a second bend, a third feed and a shear, the shear not being effected until after the lamination transfer assembly 60 has advanced and the jaws thereof gripped the newly formed lamination.
  • the succeedin' steps in the second operating cycle of the lamination stacking apparatus are similar to those effected during the first operating cycle as described above.
  • the increment head 24 is provided with means for automatically alternating the length of stroke of the lamination transfer assembly 69 so that the long stroke thereof is related to the formation of a short leg and the short stroke thereof is related to the formation of a long leg.
  • This automatic adjustment of the length of the stroke of the lamination transfer assembly is accomplished by inserting spacer plate 234 (FIG.
  • the lamination forming apparatus includes a counter which may be set so that any desired number of laminations may be fabricated. For example, if a core is to be provided with ten laminations, the counter is set at ten and, after the tenth lamination has been fabricated, circuitry controlled by the counter resets the lamination forming apparatus back to zero or normal rest or starting position. This same counter is employed as the control to trigger zeroing or resetting circuitry to return the lamination stacking apparatus back to its normal rest or starting position. The counting done by the counter is related to the shear operation, i.e., it counts the number of shears.
  • the counter when the tenth shear has been made, the counter triggers the zeroing circuitry to reset the lamination forming apparatus. At the same time, i.e., after the tenth shear has been made, the counter switches the power from the run or incrementing circuitry to the zeroing circuitry of the lamination stacking apparatus.
  • the switch actuating arm 71 depresses the switch button and actuates the switch 73, which is now powered by the zeroing circuitry
  • piston 62 is again actuated to advance the lamination transfer assembly 60, this stroke thereof being effected to faciiitate discharge of the core just formed.
  • switch 260 When the stacking table 8! reaches its lowest point, it actuates switch 260 (FIG. 13). This causes actuation of piston 62 to return the lamination transfer assembly 64 and actuation of pistons 140, 141 and 142 to return the jaws of the lamination holding assembly 70. Actuation of switch 260 also initiates the return of the increment head assembly 20 (FIG. 1). Closing of the zeroing circuitry through switch 269 demagnetizes the clutch coupling 48 (FIG. 1), releases brake t) and energizes torque motor 36 to effect a reverse rotation of ball screw shaft 33 to return it and the several major apparatus components to zero or normal starting position.
  • the ball screw 32 returns the increment head 24, and the increment head 24 returns both the lamination transfer assembly 66 and the lamination holding assembly 7% since they are both supported therefrom.
  • the platform 160 on which the increment head 24 rides is returned by the springs 172 (FIG. 2) and finally the piston 196 (FIGS. 2 and 13) is actuated to return the lamination stacking table 80.
  • the lamination stacking apparatus is now ready to start assembling a new set of laminations to provide another core.
  • Apparatus for nesting C-type electromagnetic inductor core laminations comprising: a nesting table; a platform from which said nesting table is supported; an increment head riding on said platform; a lamination transfer assembly reciprocatively supported from said increment head and including transfer jaws movable over said table; a lamination holding assembly supported from said increment head and including holding jaws disposed adjacent to said transfer jaws; means for reciprocating said lamination transfer assembly to advance said transfer jaws to obtain a lamination and to return therewith, delivering the lamination to said nesting table and to said holding jaws of said lamination holding assembly; cam means on said head adapted to operate said holding jaws; means on said platform adapted to operate said transfer jaws; and means for displacing said increment head, after each reciprocation of said lamination transfer assembly, simultaneously in both a horizontal and a vertical plane a distance equal to the thickness of a lamination whereby said lamination transfer assembly and said lamination holding assembly, both supported therefrom, are similarly displaced and said platform on which said increment head rides is
  • Apparatus for nesting C-type electromagnetic inductor core laminations comprising: a nesting table; a platform from which said nesting table is supported; an increment head riding on said platform; a lamination transfer assembly reciprocatively supported from said increment head and including transfer jaws movable over said table; means for reciprocating said lamination transfer assembly to advance the transfer jaws to obtain a lamination and to return therewith delivering the lamination to said nesting table; control means to alternately vary the stoke of said transfer jaws between a first and a second length; coacting cam means mounted on said head and said platform to operate said transfer jaws; and means for displacing said increment head, after each reciprocation of said lamination transfer assembly, simultaneously in both a horizontal and a vertical plane a distance equal to the thickness of a lamination whereby said lamination transfer assembly supported therefrom is similarly displaced and said platform on which said increment head rides is displaced in the vertical plane a distance equal to the thickness of a lamination to similarly displace said nesting table supported therefrom,
  • Apparatus for nesting C-type electromagnetic inductor core laminations having three legs formed at right angles to one another with at least one corresponding leg of successive laminations being alternately long and short said apparatus comprising: a nesting table; a platform from which said nesting table is supported; an increment head riding on said platform; a lamination transfer assembly reciprocatively supported from said increment head and including transfer jaws movable over said table; means for reciprocating said lamination transfer assembly to advance the transfer jaws to obtain a lamination and to return therewith delivering the lamination to said nesting table; coacting cam means mounted on said head and said platform to operate said transverse jaws, means for automatically effecting a change in the length of stroke of said lamination transfer assembly for each successive lamination to thereby provide for the transfer of successive laminations in which at least one corresponding leg is alternately long and short; and means for displacing said increment head, after each reciprocation of said lamination transfer assembly, simultaneously in both a horizontal and a vertical plane a distance equal to the thickness of
  • Apparatus for nesting C-type electromagnetic inductor core laminations having three legs formed at right angles to one another with at least one corresponding leg of successive laminations being alternately long and short comprising: a nesting table; a platform from which said nesting table is supported; an increment head riding on said platform; a lamination transfer assembly reciprocatively supported from said increment head and including transfer jaws movable over said table; a lamination holding assembly supported from said increment head and including holding jaws disposed adjacent to said transfer jaws; means for reciprocating said lamination transfer assembly to advance said transfer jaws to obtain a lamination and to return therewith, delivering the lamination to said nesting table and to said holding jaws of said lamination holding assembly; means for automatically effecting a change in the length of stroke of said lamination transfer assembly for each successive lamination to thereby provide for the transfer of successive larninations in which at least one corresponding leg is alternately long and short; and means for displacing said increment head, after each reciprocation of said lamination transfer assembly,

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
US265787A 1963-03-18 1963-03-18 Lamination stacking apparatus Expired - Lifetime US3220568A (en)

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US265787A US3220568A (en) 1963-03-18 1963-03-18 Lamination stacking apparatus
BE645292D BE645292A (de) 1963-03-18 1964-03-16

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US265787A US3220568A (en) 1963-03-18 1963-03-18 Lamination stacking apparatus

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US3220568A true US3220568A (en) 1965-11-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513523A (en) * 1967-04-20 1970-05-26 Gen Electric Machine and method for forming laminations for magnetic cores
EP0039901A1 (de) * 1980-05-12 1981-11-18 ALSTHOM-ATLANTIQUE Société anonyme dite: Elektrische Shunt-Drosselspule und automatische Maschine zum Schneiden von Blechen
US20120266456A1 (en) * 2009-10-28 2012-10-25 Marko Hladnik Apparatus for retaining a package of laminations of an electromagnetic core in a device for the production thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609108A (en) * 1945-04-30 1952-09-02 Odin Corp Article handling machine
US2725992A (en) * 1950-08-09 1955-12-06 Diamond Match Co Container stacking machine
US2768756A (en) * 1953-06-12 1956-10-30 Alfred E Horman Pallet loading machine
US2988237A (en) * 1954-12-10 1961-06-13 Jr George C Devol Programmed article transfer
US3115262A (en) * 1961-01-09 1963-12-24 Materials Transp Co Carton clamp for lift trucks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609108A (en) * 1945-04-30 1952-09-02 Odin Corp Article handling machine
US2725992A (en) * 1950-08-09 1955-12-06 Diamond Match Co Container stacking machine
US2768756A (en) * 1953-06-12 1956-10-30 Alfred E Horman Pallet loading machine
US2988237A (en) * 1954-12-10 1961-06-13 Jr George C Devol Programmed article transfer
US3115262A (en) * 1961-01-09 1963-12-24 Materials Transp Co Carton clamp for lift trucks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513523A (en) * 1967-04-20 1970-05-26 Gen Electric Machine and method for forming laminations for magnetic cores
EP0039901A1 (de) * 1980-05-12 1981-11-18 ALSTHOM-ATLANTIQUE Société anonyme dite: Elektrische Shunt-Drosselspule und automatische Maschine zum Schneiden von Blechen
US20120266456A1 (en) * 2009-10-28 2012-10-25 Marko Hladnik Apparatus for retaining a package of laminations of an electromagnetic core in a device for the production thereof
US8875385B2 (en) * 2009-10-28 2014-11-04 Univerza V Ljubljani Apparatus for retaining a package of laminations of an electromagnetic core in a device for the production thereof

Also Published As

Publication number Publication date
BE645292A (de) 1964-07-16

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