CA1076331A - Apparatus for manufacturing laminated cores - Google Patents
Apparatus for manufacturing laminated coresInfo
- Publication number
- CA1076331A CA1076331A CA309,741A CA309741A CA1076331A CA 1076331 A CA1076331 A CA 1076331A CA 309741 A CA309741 A CA 309741A CA 1076331 A CA1076331 A CA 1076331A
- Authority
- CA
- Canada
- Prior art keywords
- laminations
- sheet
- projection
- station
- lamination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Manufacture Of Motors, Generators (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A laminated core manufacture wherein a plurality of apertured laminations are provided with projections formed from the portion of the sheet from which the apertures are formed to define an interlocked laminated stack. The first of the laminations is provided with a through aperture with the pro-jection being eliminated so as to define a nonprojecting surface in the first of the laminations of the stack, with the projec-tions of each of the subsequent laminations extending into and being interlocked with the preceding lamination in the aperture thereof. The punching apparatus for providing the apertures and projections is selectively operated to define either the formed aperture and projection structure or a blanked out aper-tured structure. The blanked out apertured structure defines the first of the laminations of the stack. The extent of the projections from the laminations is preselected to be no greater than the thickness of the laminations so that the projection of the laminations superjacent the first lamination is received fully within the blanked out aperture thereof. The blanked out laminations may be indexed to define a skewed axis dynamoelectric structure.
A laminated core manufacture wherein a plurality of apertured laminations are provided with projections formed from the portion of the sheet from which the apertures are formed to define an interlocked laminated stack. The first of the laminations is provided with a through aperture with the pro-jection being eliminated so as to define a nonprojecting surface in the first of the laminations of the stack, with the projec-tions of each of the subsequent laminations extending into and being interlocked with the preceding lamination in the aperture thereof. The punching apparatus for providing the apertures and projections is selectively operated to define either the formed aperture and projection structure or a blanked out aper-tured structure. The blanked out apertured structure defines the first of the laminations of the stack. The extent of the projections from the laminations is preselected to be no greater than the thickness of the laminations so that the projection of the laminations superjacent the first lamination is received fully within the blanked out aperture thereof. The blanked out laminations may be indexed to define a skewed axis dynamoelectric structure.
Description
~7633~
APPARATUS FOR MANUFACTURING LAMINATED CORES
B~CKGROU~D OF THE I~ENTION
1. Field of the Invention This invention relates to dynamoelectric manufacture and in particular to an apparatus for forming a laminated dynamo-electric structure.
APPARATUS FOR MANUFACTURING LAMINATED CORES
B~CKGROU~D OF THE I~ENTION
1. Field of the Invention This invention relates to dynamoelectric manufacture and in particular to an apparatus for forming a laminated dynamo-electric structure.
2. Description of the Prior Art In U. S. Letters Patent 3,202,851 of W. J. Zimmerle et al, a manufacture of a dynamoelectric machine is illustrated ~1 ~763331 interloc~ed laminations are provided for forming a stator assembly. The laminations are provided with formed projec-tions to define the desired interlocking means between the respective laminations.
Additional prior ar-t U~;. patents which show the s tate of the art in connection with apparatus and processes for forming such stacked laminated structures includes Phelps et al 1,817,462,Johnson 1,861,059, Zimmerle 3,210,824, Bausman et al 1,874,158, Heftler 2,283,629, Goran 2,368,2~5, Io Roters 2,483,024, Korski 2,763,916, ~bbert 2,933,204r Westphalen 2,971,106, Ploran 2,975,312, Hicks 2,996,791, Rediger 3,012,16~t Hopp et al 3,060,992, Post 3,062,262, Boyer 3,070,058, Zimmerle
Additional prior ar-t U~;. patents which show the s tate of the art in connection with apparatus and processes for forming such stacked laminated structures includes Phelps et al 1,817,462,Johnson 1,861,059, Zimmerle 3,210,824, Bausman et al 1,874,158, Heftler 2,283,629, Goran 2,368,2~5, Io Roters 2,483,024, Korski 2,763,916, ~bbert 2,933,204r Westphalen 2,971,106, Ploran 2,975,312, Hicks 2,996,791, Rediger 3,012,16~t Hopp et al 3,060,992, Post 3,062,262, Boyer 3,070,058, Zimmerle
3,~10,831, Zimmerle 3,203,077, and MacLaren 2,998,638. Addi-tionally, Canadian Patent 603,175 of Gordon ~. EIerzog, and German Patent 917,626 teach interlocked laminated sheet structures for such structures.
SUM~RY OF THE INVENTION
.
While the above discussed patents show a wide range of different techniques and apparatuses for providing such laminated dynamoelectric structures, the present invention comprehends an improvement thereover wherein the stacked assem-bly is provided by new improved apparatus for facilitated and low cost construction.
More specifically, the present invention comprehends the provision of an apparatus for formin~ from a metal sheet a laminated dynamoelectric structure having a plurality of stacked interlocked formed laminations including means defining a punch-ing station ha~ing a punch for punching a portion of the sheet to form therein a displaced projection, the portioll of the sheet from which the projection is displacecl definiIl~ an apertu~e --2~
i~763~
means advancing the sheet to a blanking station, means at the blanking station for blanking out the portion to define a formed lamination, the punching station means, advancing means, and blanking station means being operated seriatim to cause a sexies of such sheet portions to be formed with the projections and apertures at the punchin~ station and advanced sequentially to the blanking station whereat the formed laminations are blanked out and stacked, ana control means for selectively causing the punching station means to continue the punching operation of the punch sufficiently to blank out the projection of the first of the series of the sheet portions from the first of the lamina-tions of the stack. The apparatus may ~e arranged to provide an indexing of the respec-tive laminations so as to provide a skewed axis dynamoelectric structure as desired.
In the illustrated embodiment, the control means comprises means for varying the stroke of the punch means so as to provide the selective blanking out of the projection from the first lamination of the stack.
The projections extend from the lamination preferably a distance no greater than the thickness of the lamina-t;on so that the projection extending into the blanked out aperture of the first lamination is effectively fully received therein.
In the illustrated embodiment, the ~ontrol of the punch is effected by suitable cam means which effectively varies the stroke of the punch to provide the desired projection forma-tion or blanked out operation.
The interlocked stacked assembly may be subjected to a press fit force prior to the delivery of the assembly from the blan~ing station to maintain the assembly during subsequen-t man-ufacturing operations.
. ~7633~
The apparatus of the present invention comprises animproved apparatus for providing a low cost, efficient manu-facture oE a dynamoelectric structure as discussed a~ove.
BRIEF DESCRIPTION OF THE DRAWING
... . . . . . ..
Other features and a~vantages of the inven-tion will be apparent from the following description taken in connec-tion ! With ~he accompanying drawing wherein:
FIGURE 1 is a fragmentary verticalsection of an appa-ratus embodying the invention;
io FIGURE 2 is a top plan view of the formed sheet metal strip illustrating different steps in the forming of the dynamo-electric machine lamination t~erein;
FIGURE 3 is a fragmentary plan ~iew of a portion of the strip defining the interlock means of the lamination;
~IGURE 4 is a fragmentary vertical section taken sub-stantially along the line 4-4 of Figure 3;
FIGURE 5 is a vertical sec~ion illustrating the oper-ation of the punch in forming the apèrture and projection means of Figures 3 and 4;
FIGURE 6 is a fragmentary plan view of the portion of a lamination intended to comprise the first lamination o~ the s~ack:
FIGURE 7 is a fragmentary ~ertical section taken sub-stantially along the line 7-7 of Figure 6;
FIGURE 8 is a fragmentary vertical section illllstrating the operation o the punch means in forming the blanked out aper-tured portion of ~igures 6 and 7;
~IGURE 9 is a fragmentary vertical section illustrating the step of blanking out the formed portion of the sheet to define 3Q the completed lamination and the placement of -the blanked out lamination on the preceding s-tac~ed laminations;
'~7633~
FIGURE 10 is a fragmentary plan view illustrating ~he indexing means of the apparatus;
FIGURE 11 is a fragmentary vertical section illus-trating the indexing means; and FIGU~E 1~ is a further vertical section illustrating the indèxillg means.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In the exemplary embodiment of the invention as dis~
closed in the drawing, a laminated dynamoelectric structure gen-erally designated lQ, as shown in Figure 1, may be formed tocomprise the rotor of an electric motor, or the like. Structure 10 is ~ormed in an improved apparatus generally designated 11 defining a plurality of forming stations. The structure 10 comprises a plurality of interlocked laminations 12 which may be formed from a sheet metal strip 13 by a series of successive forming operations as shown in Figure 2, in the apparatus 11.
More specifically as illustrated in Figure 2, the sheet metal strip 13 may be sequentially advanced in the direc-tion of the arrow 14 within apparatus 11 so as to perorm a series of operations on spaced portions of the strip as it is advanced. Illustratively, at station I, a plurality of skew control holes 15 are provided in the strip concurrently with a pair of pilot holes 16. At station II in apparatus 11, a central shaft hole 17 and an annular array of rotor slots 18 are formed in the strip concentrically o~ the control holes lS.
At station III, lamination interlock means 19 are formed in the sheet. The thusly formed portion 20 of the sheet is moved throu~h station IV to a blanking station V wherein the formed portion is blanked from the sheet leaving hole 21 therein.
The sheet may be further advanced beyond station V for lL~763 r forming of a stator structure concentrically of the hole 21.
However, the present invention is concerned with the forming of the portion 20 and the stacking thereof to define the struc-ture 10~
Stations III, IV, and V are identified on Figure 1 illustrating the arrangement of the apparatus 11 for providing the interlocking means 19. As shown in Figure 1, station III
includes a plurality of forming dies 22 for concurre~tly forming the interlocking means 19 therein. Station V includes a combi~a-tion blanking, indexing and stacking die 23.
Referring now more specifically to Figures 3-9, the interlocking means 19 illustratively comprises a projection 24 formed from the sheet 13 by the die 22. The projection is ofset from the sheet so as to define an aperture 25 opening to the hole 15, as shown in Figures 3 and 4.
The lower ed~e 26 of the forming die 22 is provided with a bevel surface 27 and a planar transverse surface 28 so as to cause the projection 24 to define an offset portion 29 spaced below the lower surface 30 of the sheet 13 and an angled connecting portion 31 connecting the offset portion 29 to the~
body of the sheet.
As shown in Figure 4, of~set portion 29 may be displaced downwardly the thickness of the sheet 13 so as to have its upper surface 32 sukstantially coplanar with the lower surface 30 of the shee~.
As ~urther illustrated inFl~ures 6~8, punch die 22 may be selectively caused to have a greater downward stroke than in forming the intellock projection 24 of Figures 3-5 whereby the projection 2g may be effectively blanked out so as to leave a through opening 33 free of any downwardly extending projection 24.
~0~633~
,,, Referring now to Figure 9, the stac~ed assembly 34 may be carried on a support 35 received in an opening 36 in a base portion 37 of the apparatus 11 at station V. The blanking die 23 is arranged to blank out the formed portion 20 of the sheet so as to define the laminations 12. As the laminations are blanked out to form the hole 21, they are urged aownwardly against the uppermost lamination carried by the support 35 into the hole 36 with the stacking of the laminations continuing until the completedstacked assembly 34 is provided.
As shown in Figure 9, the lowermos~, or first, of the laminations 12a on support 35 comprises a lamination defined by th~ blanked out opening 33 illustrated in Figures 6-8. Thus, as no projection 24 depends from the first lamination 12a, the lamination may rest on the flat upper surface 38 of support 35 with the projection 24 of the superjacent lamination extending downwardly into the opening 33 with the offset portion 29 thereof being effectively fully received within the opening 33 and hole 15, as shown in Figure 9. As furthex shown in Figure 9, each of the successively superjacent laminations has the downwardly extending projections 24 thereof received in the apertures 25 of the subjacent lamination so as to define interlocking means between the respective laminations of the stack.
The means for controlling the stroke of the punch 22 is illustrated in Figure 11 to include a cam 39 engaging a cam surface 40 on an upper end portion 41 of the punch 22. Punch portion 41 is biased upwardly by a suitable spring 42 acting between the portion 41 and a spring re-tainer 43.
Movement of cam 39 is controlled by a solenoid 44 carried by the punch holder 45 on a suitable bracket 46. As will be obvious to those skilled in the art, the solenoid 44 ~ ~7~33~
may be selectively operated suitably to cause the punch 22 to move downwardly through the guide 47 to form the projection 2~, as shown in Figure 5, or ~urther downwardly to blank out the projection and form the hole 33, as shown in Figure 8. Thus, the solenoid may be operated to provide the full movement of the punch 22 of Figure 8 at preselected intervals so as to form the lowermost lamination 12a of the series when desired.
As further shown in Figure 1, the support 35 may be carried on a suitable air cylinder 48 which allows the stacked assembly 3~ to move downwardly through the hole 36 until the desired height of the stacked assembly is reached~ At that time, the air cylinder may be operated to provide a high com-pressive force to the stackea assembly so as to provide a press fitted interlocking of thQ projections with the edges of the apertures of the subjacent laminations so as to provide a main-tained-integrity assembly which may be delivered from the blank-ing station onto a suitable guide 49 for delivery from the appa-ratus 11, as desired. Thus, as shown in Figure 1, when the air cylinder is retracted upon comple~ion of the press fitting inter-locking operation, the support 35 may be pivoted on a suitablepivot S0 by means of a pin 51 to permit the stacked assembly to move onto the guide for subsequent delivery.
As indicated briefly above, it is desired to provide an indexing o the respective laminations as they are interlocked in the stacked assembly 34. For this purpose, the base 37 de-fines a die including an inner ring 52, an outer ring 53, and an interposed one-way clutch 54.
As the blanking die 23 is brought downwardly to blank out the lamination from the shee-t, a rotation of the blanked out lamina-tion is concurrently effected to as to provide the desired 633~
skewing angle in the stacked assembly of laminations. For this purpose, an indexing lever 55 is mounted on a pivo~ 56 and biased by means of a spring 57 against a cam 58 adjustably mounted by suitable bracket 59 to the die holder 60. The end o the lever is connected to the outer ring 53 by a suitable pin 61. The punch holder 52 carries the camming frame 63 for guiding the cam 58 and a second cam 64 for controlling the move-ment of lever 55, as seen in ~igure 12. The position of cam 58 may be adjusted by means of a locking screw 65 and the position of cam 64 may be adjusted by means of a locking screw 66.
As shown in Figure 12, cam 58 defines a bevel surface 67 cooperating with a complemen.tary bevel surface 68 on the lever 55 to effect the desired indexing movement of the outer ring 53.
As further shown in Figure 1, the punch 23 may be pro-vided with projections 69 which are complementary to the formed aper~ures 25 so as to provide a snug fit therein during the blanking out operation when the blanking punch 23 is brought downwardly against the sheet 13 from the position of Figure 1.
. Thus, when the punch 23 brings the blanked out lamina-tion from sheet 13 onto the top lamination o~ the stack, the die S2 is concurrently indexed to provide the de~ired skewed r~lationship of the successive laminations interlocked in the s~acked assembly 34. In the illustrated embodiment, a stop 69 is provided on the die holder to limit the swinging of the lever 5S. The stop may be adjustably secured to the die holder by a suitable bolt 70 to permit adjusting the lever to provide the desired skew angle.
To facilitate movement of the die 52, needl.e bearings 3Q 71 may be provided bet~Jeen the die portion 52 and the die holder 7~, as shown in Pigure 1.
~0~i33~
As further-shown in Figure 1, the inn~r ~ie ring 52 may be undercut at 73 to facilitate the downward movement of the stacked laminations 34.
In the forming operation, the sheet 13, as shown in ~igure 1, is maintained in a floating disposition above the upper surface 74 of the die plate. A press stripper 75 is provided for urging the sheet 13 downwardly onto the die plate to permit the punching operation effectea by punch 22, as dis-cussed above, against the upper surface 74 of the die.. As discussed above, preselected ones of the punching operations may be caused to effect the desired blanking operation of Figures 6-8 under the control of cam 39 ana solenoid 44 through suitable control o~ the solenoid. Thus, the present invention comprehends an improved, simplified apparatus for controlling the arrangement of the interlock means of the respectîve lamina-tions of the stacked assembly by suitably controlling the move-ment of the punch 2~. The invention further comprehends -the improved facilitated forming of the stacked assembly by means of the cutoff punch 23 which blanks out the lamination from the formed portion 20 of the sheet 13 and provides an indexed, stacked association of the laminations with the first lamina-tion 12a being defined by the through openin~ 33 so as to permit the support thereof directly on the upper surface 38 of the sup-port 35.
The foregoins disclosure of specific e~bodiments is illustrative of the broad inventive concepts comprehended by the invention.
SUM~RY OF THE INVENTION
.
While the above discussed patents show a wide range of different techniques and apparatuses for providing such laminated dynamoelectric structures, the present invention comprehends an improvement thereover wherein the stacked assem-bly is provided by new improved apparatus for facilitated and low cost construction.
More specifically, the present invention comprehends the provision of an apparatus for formin~ from a metal sheet a laminated dynamoelectric structure having a plurality of stacked interlocked formed laminations including means defining a punch-ing station ha~ing a punch for punching a portion of the sheet to form therein a displaced projection, the portioll of the sheet from which the projection is displacecl definiIl~ an apertu~e --2~
i~763~
means advancing the sheet to a blanking station, means at the blanking station for blanking out the portion to define a formed lamination, the punching station means, advancing means, and blanking station means being operated seriatim to cause a sexies of such sheet portions to be formed with the projections and apertures at the punchin~ station and advanced sequentially to the blanking station whereat the formed laminations are blanked out and stacked, ana control means for selectively causing the punching station means to continue the punching operation of the punch sufficiently to blank out the projection of the first of the series of the sheet portions from the first of the lamina-tions of the stack. The apparatus may ~e arranged to provide an indexing of the respec-tive laminations so as to provide a skewed axis dynamoelectric structure as desired.
In the illustrated embodiment, the control means comprises means for varying the stroke of the punch means so as to provide the selective blanking out of the projection from the first lamination of the stack.
The projections extend from the lamination preferably a distance no greater than the thickness of the lamina-t;on so that the projection extending into the blanked out aperture of the first lamination is effectively fully received therein.
In the illustrated embodiment, the ~ontrol of the punch is effected by suitable cam means which effectively varies the stroke of the punch to provide the desired projection forma-tion or blanked out operation.
The interlocked stacked assembly may be subjected to a press fit force prior to the delivery of the assembly from the blan~ing station to maintain the assembly during subsequen-t man-ufacturing operations.
. ~7633~
The apparatus of the present invention comprises animproved apparatus for providing a low cost, efficient manu-facture oE a dynamoelectric structure as discussed a~ove.
BRIEF DESCRIPTION OF THE DRAWING
... . . . . . ..
Other features and a~vantages of the inven-tion will be apparent from the following description taken in connec-tion ! With ~he accompanying drawing wherein:
FIGURE 1 is a fragmentary verticalsection of an appa-ratus embodying the invention;
io FIGURE 2 is a top plan view of the formed sheet metal strip illustrating different steps in the forming of the dynamo-electric machine lamination t~erein;
FIGURE 3 is a fragmentary plan ~iew of a portion of the strip defining the interlock means of the lamination;
~IGURE 4 is a fragmentary vertical section taken sub-stantially along the line 4-4 of Figure 3;
FIGURE 5 is a vertical sec~ion illustrating the oper-ation of the punch in forming the apèrture and projection means of Figures 3 and 4;
FIGURE 6 is a fragmentary plan view of the portion of a lamination intended to comprise the first lamination o~ the s~ack:
FIGURE 7 is a fragmentary ~ertical section taken sub-stantially along the line 7-7 of Figure 6;
FIGURE 8 is a fragmentary vertical section illllstrating the operation o the punch means in forming the blanked out aper-tured portion of ~igures 6 and 7;
~IGURE 9 is a fragmentary vertical section illustrating the step of blanking out the formed portion of the sheet to define 3Q the completed lamination and the placement of -the blanked out lamination on the preceding s-tac~ed laminations;
'~7633~
FIGURE 10 is a fragmentary plan view illustrating ~he indexing means of the apparatus;
FIGURE 11 is a fragmentary vertical section illus-trating the indexing means; and FIGU~E 1~ is a further vertical section illustrating the indèxillg means.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In the exemplary embodiment of the invention as dis~
closed in the drawing, a laminated dynamoelectric structure gen-erally designated lQ, as shown in Figure 1, may be formed tocomprise the rotor of an electric motor, or the like. Structure 10 is ~ormed in an improved apparatus generally designated 11 defining a plurality of forming stations. The structure 10 comprises a plurality of interlocked laminations 12 which may be formed from a sheet metal strip 13 by a series of successive forming operations as shown in Figure 2, in the apparatus 11.
More specifically as illustrated in Figure 2, the sheet metal strip 13 may be sequentially advanced in the direc-tion of the arrow 14 within apparatus 11 so as to perorm a series of operations on spaced portions of the strip as it is advanced. Illustratively, at station I, a plurality of skew control holes 15 are provided in the strip concurrently with a pair of pilot holes 16. At station II in apparatus 11, a central shaft hole 17 and an annular array of rotor slots 18 are formed in the strip concentrically o~ the control holes lS.
At station III, lamination interlock means 19 are formed in the sheet. The thusly formed portion 20 of the sheet is moved throu~h station IV to a blanking station V wherein the formed portion is blanked from the sheet leaving hole 21 therein.
The sheet may be further advanced beyond station V for lL~763 r forming of a stator structure concentrically of the hole 21.
However, the present invention is concerned with the forming of the portion 20 and the stacking thereof to define the struc-ture 10~
Stations III, IV, and V are identified on Figure 1 illustrating the arrangement of the apparatus 11 for providing the interlocking means 19. As shown in Figure 1, station III
includes a plurality of forming dies 22 for concurre~tly forming the interlocking means 19 therein. Station V includes a combi~a-tion blanking, indexing and stacking die 23.
Referring now more specifically to Figures 3-9, the interlocking means 19 illustratively comprises a projection 24 formed from the sheet 13 by the die 22. The projection is ofset from the sheet so as to define an aperture 25 opening to the hole 15, as shown in Figures 3 and 4.
The lower ed~e 26 of the forming die 22 is provided with a bevel surface 27 and a planar transverse surface 28 so as to cause the projection 24 to define an offset portion 29 spaced below the lower surface 30 of the sheet 13 and an angled connecting portion 31 connecting the offset portion 29 to the~
body of the sheet.
As shown in Figure 4, of~set portion 29 may be displaced downwardly the thickness of the sheet 13 so as to have its upper surface 32 sukstantially coplanar with the lower surface 30 of the shee~.
As ~urther illustrated inFl~ures 6~8, punch die 22 may be selectively caused to have a greater downward stroke than in forming the intellock projection 24 of Figures 3-5 whereby the projection 2g may be effectively blanked out so as to leave a through opening 33 free of any downwardly extending projection 24.
~0~633~
,,, Referring now to Figure 9, the stac~ed assembly 34 may be carried on a support 35 received in an opening 36 in a base portion 37 of the apparatus 11 at station V. The blanking die 23 is arranged to blank out the formed portion 20 of the sheet so as to define the laminations 12. As the laminations are blanked out to form the hole 21, they are urged aownwardly against the uppermost lamination carried by the support 35 into the hole 36 with the stacking of the laminations continuing until the completedstacked assembly 34 is provided.
As shown in Figure 9, the lowermos~, or first, of the laminations 12a on support 35 comprises a lamination defined by th~ blanked out opening 33 illustrated in Figures 6-8. Thus, as no projection 24 depends from the first lamination 12a, the lamination may rest on the flat upper surface 38 of support 35 with the projection 24 of the superjacent lamination extending downwardly into the opening 33 with the offset portion 29 thereof being effectively fully received within the opening 33 and hole 15, as shown in Figure 9. As furthex shown in Figure 9, each of the successively superjacent laminations has the downwardly extending projections 24 thereof received in the apertures 25 of the subjacent lamination so as to define interlocking means between the respective laminations of the stack.
The means for controlling the stroke of the punch 22 is illustrated in Figure 11 to include a cam 39 engaging a cam surface 40 on an upper end portion 41 of the punch 22. Punch portion 41 is biased upwardly by a suitable spring 42 acting between the portion 41 and a spring re-tainer 43.
Movement of cam 39 is controlled by a solenoid 44 carried by the punch holder 45 on a suitable bracket 46. As will be obvious to those skilled in the art, the solenoid 44 ~ ~7~33~
may be selectively operated suitably to cause the punch 22 to move downwardly through the guide 47 to form the projection 2~, as shown in Figure 5, or ~urther downwardly to blank out the projection and form the hole 33, as shown in Figure 8. Thus, the solenoid may be operated to provide the full movement of the punch 22 of Figure 8 at preselected intervals so as to form the lowermost lamination 12a of the series when desired.
As further shown in Figure 1, the support 35 may be carried on a suitable air cylinder 48 which allows the stacked assembly 3~ to move downwardly through the hole 36 until the desired height of the stacked assembly is reached~ At that time, the air cylinder may be operated to provide a high com-pressive force to the stackea assembly so as to provide a press fitted interlocking of thQ projections with the edges of the apertures of the subjacent laminations so as to provide a main-tained-integrity assembly which may be delivered from the blank-ing station onto a suitable guide 49 for delivery from the appa-ratus 11, as desired. Thus, as shown in Figure 1, when the air cylinder is retracted upon comple~ion of the press fitting inter-locking operation, the support 35 may be pivoted on a suitablepivot S0 by means of a pin 51 to permit the stacked assembly to move onto the guide for subsequent delivery.
As indicated briefly above, it is desired to provide an indexing o the respective laminations as they are interlocked in the stacked assembly 34. For this purpose, the base 37 de-fines a die including an inner ring 52, an outer ring 53, and an interposed one-way clutch 54.
As the blanking die 23 is brought downwardly to blank out the lamination from the shee-t, a rotation of the blanked out lamina-tion is concurrently effected to as to provide the desired 633~
skewing angle in the stacked assembly of laminations. For this purpose, an indexing lever 55 is mounted on a pivo~ 56 and biased by means of a spring 57 against a cam 58 adjustably mounted by suitable bracket 59 to the die holder 60. The end o the lever is connected to the outer ring 53 by a suitable pin 61. The punch holder 52 carries the camming frame 63 for guiding the cam 58 and a second cam 64 for controlling the move-ment of lever 55, as seen in ~igure 12. The position of cam 58 may be adjusted by means of a locking screw 65 and the position of cam 64 may be adjusted by means of a locking screw 66.
As shown in Figure 12, cam 58 defines a bevel surface 67 cooperating with a complemen.tary bevel surface 68 on the lever 55 to effect the desired indexing movement of the outer ring 53.
As further shown in Figure 1, the punch 23 may be pro-vided with projections 69 which are complementary to the formed aper~ures 25 so as to provide a snug fit therein during the blanking out operation when the blanking punch 23 is brought downwardly against the sheet 13 from the position of Figure 1.
. Thus, when the punch 23 brings the blanked out lamina-tion from sheet 13 onto the top lamination o~ the stack, the die S2 is concurrently indexed to provide the de~ired skewed r~lationship of the successive laminations interlocked in the s~acked assembly 34. In the illustrated embodiment, a stop 69 is provided on the die holder to limit the swinging of the lever 5S. The stop may be adjustably secured to the die holder by a suitable bolt 70 to permit adjusting the lever to provide the desired skew angle.
To facilitate movement of the die 52, needl.e bearings 3Q 71 may be provided bet~Jeen the die portion 52 and the die holder 7~, as shown in Pigure 1.
~0~i33~
As further-shown in Figure 1, the inn~r ~ie ring 52 may be undercut at 73 to facilitate the downward movement of the stacked laminations 34.
In the forming operation, the sheet 13, as shown in ~igure 1, is maintained in a floating disposition above the upper surface 74 of the die plate. A press stripper 75 is provided for urging the sheet 13 downwardly onto the die plate to permit the punching operation effectea by punch 22, as dis-cussed above, against the upper surface 74 of the die.. As discussed above, preselected ones of the punching operations may be caused to effect the desired blanking operation of Figures 6-8 under the control of cam 39 ana solenoid 44 through suitable control o~ the solenoid. Thus, the present invention comprehends an improved, simplified apparatus for controlling the arrangement of the interlock means of the respectîve lamina-tions of the stacked assembly by suitably controlling the move-ment of the punch 2~. The invention further comprehends -the improved facilitated forming of the stacked assembly by means of the cutoff punch 23 which blanks out the lamination from the formed portion 20 of the sheet 13 and provides an indexed, stacked association of the laminations with the first lamina-tion 12a being defined by the through openin~ 33 so as to permit the support thereof directly on the upper surface 38 of the sup-port 35.
The foregoins disclosure of specific e~bodiments is illustrative of the broad inventive concepts comprehended by the invention.
Claims (10)
1. In an apparatus for forming from a metal sheet a laminated dynamoelectric structure having a plurality of stacked interlocked formed laminations, the improvement comprising:
means defining a punching station having a punch for punching a portion of the sheet to form therein a displaced projection, said portion of the sheet from which the projection is displaced defining an aperture;
means for advancing the sheet to a blanking station;
means at the blanking station for blanking out said portion to define a formed lamination, said punching station means, advancing means, and blanking station means being operated seriatim to cause a series of such sheet portions to be formed with said projections and apertures at said punching station and advanced sequentially to said blanking station whereat the formed laminations are blanked out and stacked; and control means for selectively causing the punching station means to continue the punching operation of said punch sufficiently to blank out the projection of the first of the series of said sheet portion to form the first of the laminations of the stack.
means defining a punching station having a punch for punching a portion of the sheet to form therein a displaced projection, said portion of the sheet from which the projection is displaced defining an aperture;
means for advancing the sheet to a blanking station;
means at the blanking station for blanking out said portion to define a formed lamination, said punching station means, advancing means, and blanking station means being operated seriatim to cause a series of such sheet portions to be formed with said projections and apertures at said punching station and advanced sequentially to said blanking station whereat the formed laminations are blanked out and stacked; and control means for selectively causing the punching station means to continue the punching operation of said punch sufficiently to blank out the projection of the first of the series of said sheet portion to form the first of the laminations of the stack.
2. The apparatus of Claim 1 wherein said control means comprises means for varying the stroke of said punch means.
3 The apparatus of Claim 1 wherein said punch is arranged to cause said projection to extend from the lamination from which it is formed a distance substantially equal to the thickness of the lamination.
4. The apparatus of Claim 1 further including means for causing said sheet portions to include an opening adjacent the projection.
5. The apparatus of Claim 1 further including means for causing said sheet portions to include an opening contiguous to said aperture.
6. The apparatus of Claim 1 further including means for causing said sheet portions to further define an annular array of slots, said punching means being arranged to form said proj-ections and apertures in indexed relationship to said slots.
7. The apparatus of Claim 1 wherein said punching means includes a cam for moving said punch, and means for controlling the movement of the cam for selectively varying the stroke of the punch to provide selectively said projections and the blank-ing out of the projection of said first sheet portion.
8. The apparatus of Claim 1 wherein means are provided for transferring the laminations from the blanking station in the form of an interlocked stack with said first blanked out lamination lowermost.
9. The apparatus of Claim 1 further including means for press fitting the interlocked projections and apertures of the stacked lamination, and means for subsequently transferring the press fitted interlocked laminations as a stack from the blank-ing station.
10. The apparatus of Claim 1 further including means for press fitting the interlocked projections and apertures of the stacked laminations, and means for subsequently transferring the press fitted interlocked laminations as a stack from the blanking station in sequentially indexed relationship to define a skewed axis dynamoelectric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA309,741A CA1076331A (en) | 1978-08-21 | 1978-08-21 | Apparatus for manufacturing laminated cores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA309,741A CA1076331A (en) | 1978-08-21 | 1978-08-21 | Apparatus for manufacturing laminated cores |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1076331A true CA1076331A (en) | 1980-04-29 |
Family
ID=4112177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA309,741A Expired CA1076331A (en) | 1978-08-21 | 1978-08-21 | Apparatus for manufacturing laminated cores |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1076331A (en) |
-
1978
- 1978-08-21 CA CA309,741A patent/CA1076331A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4110895A (en) | Apparatus for manufacturing laminated cores | |
| US4272579A (en) | Laminated stack manufacture | |
| EP0910487B1 (en) | Apparatus and method for manufacturing a lamina stack | |
| US5799387A (en) | Lamina stack having a plurality of outer perimeter configurations and an apparatus and method for manufacturing said stack | |
| US5809638A (en) | Method for manufacturing laminated parts with center interlock | |
| US7062841B2 (en) | Method of manufacturing a formable laminated stack in a progressive die assembly having a choke | |
| JPH05103449A (en) | Manufacture of laminated core for dynamoelectric machine | |
| CA1076331A (en) | Apparatus for manufacturing laminated cores | |
| US4998430A (en) | Manufacture of rotor lamination for a dynamoelectric machine | |
| CN112910118B (en) | Stator core and production mold thereof | |
| EP0042046B1 (en) | Method of, and apparatus for, manufacturing laminated dynamoelectric machine structures | |
| CN116020935B (en) | High-efficient stator and rotor punching sheet cover is towards equipment | |
| JPS626887B2 (en) | ||
| US6636137B1 (en) | Ignition coil assembly | |
| CN212381002U (en) | Large-rotation skew round buckle self-riveting rotor and rotor press-riveting die | |
| US6523445B2 (en) | Loose lamination die with rotating blanking station | |
| CN115378204A (en) | Manufacturing method of laminated iron core, laminated sheet, iron core and motor | |
| CN114744836A (en) | Multi-model steel sheet combined laminated motor iron core, manufacturing method and continuous stamping die | |
| CN116979768B (en) | Special-shaped rotor core assembling equipment and application method thereof | |
| CN207238942U (en) | Motor stamping turns round mould | |
| CN111817462B (en) | Large-rotation skew round buckle self-riveting rotor and rotor press-riveting die | |
| US20030029023A1 (en) | Assembly method for stamped and cupped laminations | |
| JP3492008B2 (en) | Manufacturing method of laminated iron core | |
| CN221133754U (en) | Special-shaped rotor piece processing equipment | |
| EP1121211B1 (en) | Method of manufacturing long, slender lamina stacks of non-uniform laminae |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |