CN112260494B - Manufacturing process of motor stator core - Google Patents
Manufacturing process of motor stator core Download PDFInfo
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- CN112260494B CN112260494B CN202011515098.6A CN202011515098A CN112260494B CN 112260494 B CN112260494 B CN 112260494B CN 202011515098 A CN202011515098 A CN 202011515098A CN 112260494 B CN112260494 B CN 112260494B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
Abstract
The invention discloses a manufacturing process of a motor stator iron core, which comprises the following process steps: step A, feeding; b, punching a guide hole; c, punching a metering point or a buckling point: each pair of metering points or buckling points are distributed in central symmetry about the same point; step D, blanking: punching and blanking the position of the strip material on which the metering point or the buckling point is punched by using a rotary punching device, wherein a female die on the rotary punching device can rotate to obtain a stator core single sheet temporarily stored in the rotary punching device; repeatedly punching and blanking for multiple times, wherein at least one female die rotates for 180 degrees after each punching and blanking is finished, and the stator core single sheets obtained through multiple punching and blanking are stacked in the rotary punching device and finally fall off from the rotary punching device in the form of stator core single blocks; step E, assembling: and annularly splicing the plurality of stator core monomer blocks. The invention has the advantages of good thickness consistency of the produced stator core, small size difference and good product control.
Description
Technical Field
The invention relates to the technical field of motor stator cores, in particular to a manufacturing process of a motor stator core.
Background
The bar stock is a raw material for manufacturing a motor stator core, and the prior assembled stator core is generally that stator core monomer sheets with consistent shapes are punched on the bar stock, then the stator core monomer sheets are buckled in a die through buckling points so as to form stator core monomer blocks in a laminated mode, and finally the stator core monomer blocks are annularly spliced to obtain a finished product. The thickness of the strip material along the width direction is not equal everywhere after the strip material is produced, the thickness tolerance of the strip material before leaving the factory can be supplied to the outside only by meeting the factory standards of various manufacturers, and the strip material also has certain same plate difference (the thickness of two sides of the strip material has a small difference) objectively, even if the same plate difference is small, after a plurality of stator core single sheets are stacked, the size difference can be multiplied, so that the phenomenon of unequal thickness appears in the longitudinal direction after the stator core sheets are stacked, and the service performance of the motor is finally influenced. Due to the existence of the same plate difference, the thickness size difference of the laminated stator core single sheets is difficult to control, and the quality control of the motor is seriously influenced. Therefore, the existing motor stator core manufacturing process has the problems that the stator core is easy to have uneven thickness, the use performance of the motor is influenced, the sizes of the stator cores are greatly different, and the quality control is poor.
Disclosure of Invention
The invention aims to provide a manufacturing process of a motor stator core. The method has the advantages of good thickness consistency of the produced stator cores, small size difference among the stator cores and good product control.
The technical scheme of the invention is as follows: a manufacturing process of a motor stator core comprises the following process steps:
step A, feeding: feeding the strip material into a punch press, so that the strip material can be continuously fed forwards step by step on the punch press;
b, punching a pilot hole: in the process of feeding the strip materials forwards in a stepping manner, punching of the pilot holes is performed on two sides of the strip materials in the length direction after each stepping;
c, punching a metering point or a buckling point: in the process of feeding the strip materials forwards in a stepping manner, stamping a plurality of pairs of metering points or buckling points after each stepping, wherein each pair of metering points or buckling points are distributed in central symmetry about the same point;
step D, blanking: utilize gyration stamping device to carry out the punching press blanking to the strip material, the last die of gyration stamping device is rotatable, is equipped with a plurality of to the material level that falls about the central symmetric distribution of die pivot one-tenth on the die, and the blanking specifically includes:
action d 1: the rotary punching device punches the position of the metering point or the buckling point on the bar material to perform punching blanking, so as to obtain the stator core single sheet temporarily stored in the rotary punching device;
action d 2: the stator core single sheet temporarily stored in the rotary punching device rotates 180 degrees along with the female die of the rotary punching device;
in the process of feeding the strip material forwards in a stepping mode, the action d1 is carried out once when the strip material is fed forwards in a stepping mode, and in the process of repeatedly carrying out the action d1, the action d2 is carried out immediately after at least one action d1 is finished;
the stator core single sheets obtained by multiple times of stamping and blanking are buckled and laminated in the rotary stamping device, and fall off from the rotary stamping device in the form of stator core single blocks after the stator core single sheets are laminated to a certain thickness;
step E, assembling: and splicing the plurality of stator core single blocks falling off from the rotary punching device in an annular manner to obtain a stator core finished product.
Compared with the prior art, the invention has the beneficial effects that: in the process steps of the invention, when the stator core monomer sheet is blanked, the punched stator core monomer sheet is temporarily stored by using the rotary punching device, a female die on the rotary punching device can rotate, and the blanked stator core monomer pieces can be selectively rotated 180 degrees together with the female die of the rotary punching device, when the female die rotates 180 degrees, the material falling position of the next stamping of the female die is in central symmetry with the former stamping, therefore, when punching and blanking again, the blanking area on the strip material corresponding to the same blanking position on the female die is in central symmetry with the blanking area on the strip material punched in the previous time, so that two stator core monomer sheets which are in a centrosymmetric relation on the strip material can be stacked in the rotary punching device, therefore, the phenomenon of uneven thickness of the stator core caused by the same plate difference in the width direction of the bar stock is effectively eliminated, and the stator core with better thickness consistency is produced.
The stator core monomer sheets punched from the strip material are temporarily stored in the rotary punching device, and after the stator core monomer sheets are continuously buckled and laminated to a certain number, the stator core monomer sheets directly fall off from the rotary punching device in the form of stator core monomer blocks, so that the size difference of the obtained stator core monomer blocks is small, and finally, stator core finished products with small size difference and good product control can be assembled.
In the foregoing manufacturing process of a motor stator core, in step C, the punching times at intervals between two adjacent punching measurement points are equal to the number of stator core single sheet pieces punched with fastening points in one stator core single body block, the stator core single sheet located at the bottommost of the stator core single body block is punched with the measurement points, and the other stator core single sheets are punched with fastening points.
In the foregoing manufacturing process of the motor stator core, before step a, the average thickness of the bar stock is detected in advance, and a multiple relationship between the average thickness of the bar stock and a set value of the thickness of the stator core single block is calculated to obtain the number of stator core single blocks to be stamped by one stator core single block, so that the stamping times of the interval between two adjacent stamping metering points in step C are controlled, and the thickness of the stator core single block obtained in step D is closest to the set value.
Alternatively, in step D, each action D2 is performed immediately after the end of action D1.
As another option, in the step D, in the process of dropping off the group of stator core monomer blocks, after n times of head and tail actions D1 are finished, no action D2 is performed, and after the remaining times of actions D1 are finished, one action D2 is performed immediately, so that in the finally dropped stator core monomer block, n stator core monomer sheets at the head end and the tail end are punched and dropped under the condition that a female die of a rotary punching device does not rotate, wherein n is more than or equal to 2 and less than or equal to 20, and the value of n can be selected according to the thickness of the stator core monomer sheets.
In the manufacturing process of the motor stator core, when the n stator core single sheets at the head end and the tail end are punched and blanked, the blanking positions on the corresponding female dies are centrosymmetric about the rotating shaft of the female die.
In the manufacturing process of the motor stator core, the rotary stamping device comprises a male die capable of reciprocating up and down under the positioning of a male die guide plate, a rotatable shaft sleeve is arranged below the male die, a female die and a locking ring are sequentially arranged in the shaft sleeve from top to bottom, a bushing is arranged on the outer side of the shaft sleeve, and a belt pulley is connected below the shaft sleeve; and a plurality of pairs of through charging chutes are arranged on the female die, the locking ring, the shaft sleeve and the belt pulley, and each pair of charging chutes are distributed in central symmetry about the rotating shaft of the shaft sleeve.
In the manufacturing process of the motor stator core, the top of the shaft sleeve is provided with a positioning hole, a positioning column sleeve is installed in the positioning hole, and a rotary positioning column capable of being inserted into the positioning column sleeve is arranged above the positioning hole.
In the foregoing manufacturing process of the motor stator core, a needle bearing and a flat bearing are disposed between the shaft sleeve and the bushing, and a flat bearing is disposed between the bushing and the belt pulley.
Drawings
FIG. 1 is a schematic view of a stamping process flow line according to the present invention;
FIG. 2 is a diagram of the effect caused by the same plate difference after the single sheets of the conventional stator core are laminated;
FIG. 3 is a blanking position arrangement of double rows of stator core monomer pieces on a strip stock;
FIG. 4 is another blanking level arrangement of double row stator core monomer pieces on a strip stock;
FIG. 5 is a blanking position arrangement of four rows of stator core monomer pieces on a strip material;
FIG. 6 is another arrangement of the four rows of the daughter core monomer chips on the web as a material drop position;
FIG. 7 is a schematic view of the internal structure of the rotary press apparatus;
FIG. 8 is an enlarged view of a portion of FIG. 6 at A;
FIG. 9 is a schematic view of a lamination process for the stator core segments;
fig. 10 is an effect diagram of the laminated stator core unit sheets in embodiment 1 of the present invention.
Reference numerals: 1-strip material, 2-pilot hole, 3-metering point, 4-buckling point, 5-rotary punching device, 6-servo motor, 7-belt, 51-male die, 52-shaft sleeve, 53-female die, 54-locking ring, 55-bushing, 56-belt pulley, 57-blanking groove, 58-pilot hole, 59-male die guide plate and 60-rotary positioning column.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1: a manufacturing process of a motor stator core comprises the following process steps:
the method comprises the following steps: detecting the average thickness of the strip 1 to obtain a multiple relation between the average thickness of the strip 1 and a set value of the thickness of the stator core monomer block, so as to determine the number of stator core monomer pieces required to be punched to form one stator core monomer block;
step A, feeding: feeding the strip material 1 into a punch press, so that the strip material 1 can be continuously fed forwards in a stepping manner on the punch press; the punching machine is sequentially provided with a pilot hole punching 2 station, a metering point punching 3 station, a button punching 4 station and a blanking station in the forward stepping direction, and a punching process flow line sketch is shown in figure 1;
b, punching a pilot hole 2: in the process of feeding the strip material 1 forwards in a stepping manner, punching of the pilot holes 2 is performed on two sides of the strip material 1 in the length direction after each stepping; the pilot holes 2 are arranged in two rows in the direction that the strip material 1 advances in a stepping mode, the pilot holes 2 in each row are distributed at equal intervals, the pilot holes 2 in the two rows are distributed in a staggered mode, and the distance between every two adjacent pilot holes 2 in the same row is the feeding step pitch;
step C, punching a metering point 3 or a buckling point 4: in the process of feeding the strip material 1 forwards in a stepping manner, stamping a metering point 3 or a buckling point 4 after each stepping, wherein the metering point 3 or the buckling point 4 are distributed in central symmetry about the same point;
the stamping choice for the stamping gauge point 3 or the buckling point 4 satisfies the following law:
punching times of intervals between every two adjacent punching metering points 3 are equal to the number of stator core single sheets punched with the buckling points 4 in one stator core single block, wherein the metering points 3 are punched on the stator core single sheet positioned at the bottommost part of the stator core single block in one stator core single block, and the buckling points 4 are punched on the other stator core single sheets;
the stamping position of the metering point 3 on the bar stock 1 is determined according to the multiple relation between the average thickness of the bar stock 1 and the thickness set value of the stator core monomer block obtained in the pre-step, and the minimum difference between the thickness of the stator core monomer block obtained in the step D and the set value needs to be ensured;
step D, blanking: utilize gyration stamping device 5 to carry out the punching press blanking to strip 1, the die 53 on the gyration stamping device 5 is rotatable, is equipped with a pair of material level that falls about die 53 pivot one-tenth central symmetric distribution on the die 53, and the blanking specifically includes:
action d 1: the rotary punching device 5 punches the metering point 3 or the buckling point 4 on the strip material 1 to perform punching blanking to obtain a stator core monomer sheet temporarily stored in the rotary punching device 5;
action d 2: the stator core single sheets temporarily stored in the rotary punching device 5 rotate 180 degrees together with the female die 53 of the rotary punching device 5;
in the process of feeding the strip material 1 forwards in a stepping mode, the strip material 1 performs a motion d1 once in a stepping mode, and a motion d2 is performed immediately after the motion d1 is finished each time;
the stator core single sheets obtained by multiple times of punching and blanking are buckled and laminated in the rotary punching device 5, and after the stator core single sheets are laminated to a certain thickness, the stator core single sheets fall off from the rotary punching device 5 in the form of stator core single block;
in the embodiment, the binding force of the fastening points 4 between the stator core monomer pieces should overcome the rotation inertia of the rotation mechanism, so as to ensure that the stator core monomer pieces are not twisted off due to the rotation of the rotation stamping device 5 before coming off from the rotation stamping device 5, and generally, the stator core monomer pieces can completely and smoothly come off without the need of subsequent lamination processing; if the stator core monomer blocks are still twisted off, the twisted-off two sections need to be taken out and collected in time, and then the lamination processing is carried out, so that the phenomenon that the stator core monomer blocks which are twisted off in multiple sections are mixed with each other is avoided, and the trouble is added to the subsequent lamination processing.
Step E, assembling: and annularly splicing the plurality of stator core single blocks falling off from the rotary punching device 5 to obtain a stator core finished product, wherein the stator core single blocks can be connected by adopting modes such as adhesive bonding, laser welding and the like during splicing.
Because the strip material 1 needs to be replaced after being exhausted, the quality of the replaced strip material 1 cannot be guaranteed to be consistent with that of the previous strip material 1, and the design of the pre-step enables the stator core finished product with the thickness close to a set value to be produced even if the average thickness of the strip material 1 is changed.
Preferably, as shown in fig. 7, the rotary punching device 5 of the present invention includes a punch 51 capable of reciprocating up and down under the positioning of a punch guide plate 59, a rotatable shaft sleeve 52 is disposed below the punch 51, a female die 53 and a locking ring 54 are sequentially disposed inside the shaft sleeve 52 from top to bottom, a bushing 55 is disposed outside the shaft sleeve 52, and a belt pulley 56 is connected below the shaft sleeve 52; the female die 53, the locking ring 54, the shaft sleeve 52 and the belt pulley 56 are provided with a pair of through charging chutes 57, and the charging chutes 57 are distributed in central symmetry about the rotating shaft of the shaft sleeve 52.
The female die 53 in this embodiment has two blanking positions (corresponding to a pair of blanking grooves 57), at this time, the shape of the strip 1 corresponding to the blanking shape in the last stamping is as shown in fig. 3 or fig. 4, the blanking shape is centrosymmetric, the female die 53 rotates along with the locking ring 54 and the shaft sleeve 52, when the female die 53 rotates, the male die 51 does not need to rotate synchronously with the female die 53, and the male die 51 has a protrusion corresponding to the fastening point 4. The pulley 56 acts on the sleeve 52 to rotate the same, and the pulley 56 is connected to the servo motor 6 through the belt 7 and driven to rotate by the servo motor 6.
Furthermore, the top of the shaft sleeve 52 is provided with a positioning hole 58, a positioning column sleeve is installed in the positioning hole 58, a rotary positioning column 60 capable of being inserted into the positioning column sleeve is arranged above the positioning hole 58, and the shaft sleeve 52 and the female die 53 frequently rotate for 180 degrees, so that after each rotation, the rotary positioning column 60 is required to be inserted into the positioning hole 58, and the material falling position on the female die 53 is ensured to be aligned with the male die 51 all the time.
Further, a needle bearing and a flat bearing are provided between the sleeve 52 and the bush 55, and a flat bearing is provided between the bush 55 and the pulley 56, so that the sleeve 52 can be smoothly rotated.
In this embodiment, the size optimization of the stator core, which may be brought by a conventional lamination method, is huge, the thicknesses of two ends of the bar stock 1 are respectively t and t + a, when m stator core monomer sheets are stacked, the thickness of one end of the conventional stator core is m × t, the thickness of the other end of the conventional stator core is m × t + a, and the two ends of the conventional stator core are integrated to generate a size error of m × a, as shown in fig. 2, while in this embodiment, the two ends of the stator core monomer sheets (when the number of the stator core monomer sheets is an even number) are equal in thickness and are both mt + ma/2, as shown in fig. 10, the sizes of the two ends are error-free, even when the number of the stator core monomer sheets is an odd number, the size error of the two ends of the stator core monomer sheets after stacking is only a in the process of the present invention, the size error is extremely small, and for a motor with.
Example 2: a manufacturing process of a motor stator core comprises the following process steps:
the method comprises the following steps: detecting the average thickness of the strip 1 to obtain a multiple relation between the average thickness of the strip 1 and a set value of the thickness of the stator core monomer block, so as to determine the number of stator core monomer pieces required to be punched to form one stator core monomer block;
step A, feeding: feeding the strip material 1 into a punch press, so that the strip material 1 can be continuously fed forwards in a stepping manner on the punch press; the punching machine is sequentially provided with a pilot hole punching 2 station, a metering point punching 3 station, a button punching 4 station and a blanking station in the forward stepping direction, and a punching process flow line sketch is shown in figure 1;
b, punching a pilot hole 2: in the process of feeding the strip material 1 forwards in a stepping manner, punching of the pilot holes 2 is performed on two sides of the strip material 1 in the length direction after each stepping; the pilot holes 2 are arranged in two rows in the direction that the strip material 1 advances in a stepping mode, the pilot holes 2 in each row are distributed at equal intervals, the pilot holes 2 in the two rows are distributed in a staggered mode, and the distance between every two adjacent pilot holes 2 in the same row is the feeding step pitch;
step C, punching a metering point 3 or a buckling point 4: in the process of feeding the strip material 1 forwards in a stepping manner, stamping a metering point 3 or a buckling point 4 after each stepping, wherein the metering point 3 or the buckling point 4 are distributed in central symmetry about the same point;
the stamping choice for the stamping gauge point 3 or the buckling point 4 satisfies the following law:
punching times of intervals between every two adjacent punching metering points 3 are equal to the number of stator core single sheets punched with the buckling points 4 in one stator core single block, wherein the metering points 3 are punched on the stator core single sheet positioned at the bottommost part of the stator core single block in one stator core single block, and the buckling points 4 are punched on the other stator core single sheets;
the stamping position of the metering point 3 on the bar stock 1 is determined according to the multiple relation between the average thickness of the bar stock 1 and the thickness set value of the stator core monomer block obtained in the pre-step, and the minimum difference between the thickness of the stator core monomer block obtained in the step D and the set value needs to be ensured;
step D, blanking: utilize gyration stamping device 5 to carry out the punching press blanking to strip 1, the die 53 on the gyration stamping device 5 is rotatable, is equipped with a pair of material level that falls about die 53 pivot one-tenth central symmetric distribution on the die 53, and the blanking specifically includes:
action d 1: the rotary punching device 5 punches the metering point 3 or the buckling point 4 on the strip material 1 to perform punching blanking to obtain a stator core monomer sheet temporarily stored in the rotary punching device 5;
action d 2: the stator core single sheets temporarily stored in the rotary punching device 5 rotate 180 degrees together with the female die 53 of the rotary punching device 5;
in the process of feeding the bar stock 1 forwards in a stepping mode, the bar stock 1 performs d1 once in each stepping mode, further, in the process of dropping a group of stator core single blocks, the d2 is not performed after the end 6 actions d1, and the d2 is performed immediately after the rest actions d1 are performed;
the stator core monomer pieces obtained through multiple times of punching and blanking are buckled and laminated in the rotary punching device 5, after the stator core monomer pieces are laminated to a certain thickness, the stator core monomer pieces fall off from the rotary punching device 5 in the form of stator core monomer blocks, in the stator core monomer blocks which finally fall off, 6 stator core monomer pieces are arranged at the head end and the tail end of the stator core monomer pieces, the punching and blanking are completed under the condition that a female die 53 of the rotary punching device 5 does not rotate, when the 6 stator core monomer pieces at the head end and the tail end are punched and blanked, the blanking positions on the female die corresponding to the stator core monomer pieces are in central symmetry about a rotating shaft of the female die, namely, after the respective 6 stator core monomer pieces at the head end and the tail end are removed, the punching times of the remaining stator core monomer pieces in the middle are odd;
step E, assembling: and splicing the plurality of stator core single blocks falling off from the rotary punching device 5 in an annular manner to obtain a stator core finished product.
Because the strip material 1 needs to be replaced after being exhausted, the quality of the replaced strip material 1 cannot be guaranteed to be consistent with that of the previous strip material 1, and the design of the pre-step enables the stator core finished product with the thickness close to a set value to be produced even if the average thickness of the strip material 1 is changed.
Preferably, as shown in fig. 7 and 8, the rotary punching device 5 of the present invention includes a punch 51 capable of reciprocating up and down under the positioning of a punch guide plate 59, a rotatable shaft sleeve 52 is disposed below the punch 51, a female die 53 and a locking ring 54 are sequentially disposed inside the shaft sleeve 52 from top to bottom, a bushing 55 is disposed outside the shaft sleeve 52, and a belt pulley 56 is connected below the shaft sleeve 52; the female die 53, the locking ring 54, the shaft sleeve 52 and the belt pulley 56 are provided with a pair of through charging chutes 57, and the charging chutes 57 are distributed in central symmetry about the rotating shaft of the shaft sleeve 52.
The female die 53 in this embodiment has two corresponding blanking positions (a pair of blanking slots 57) and is centrosymmetric, the female die 53 rotates along with the locking ring 54 and the shaft sleeve 52, when the female die 53 rotates, the male die 51 does not need to rotate synchronously with the female die 53, and the male die 51 is provided with a protrusion corresponding to the fastening point 4. The pulley 56 acts on the sleeve 52 to rotate the same, and the pulley 56 is connected to the servo motor 6 through the belt 7 and driven to rotate by the servo motor 6.
Furthermore, the top of the shaft sleeve 52 is provided with a positioning hole 58, a positioning column sleeve is installed in the positioning hole 58, a rotary positioning column 60 capable of being inserted into the positioning column sleeve is arranged above the positioning hole 58, and the shaft sleeve 52 and the female die 53 frequently rotate for 180 degrees, so that after each rotation, the rotary positioning column 60 is required to be inserted into the positioning hole 58, and the material falling position on the female die 53 is ensured to be aligned with the male die 51 all the time.
Further, a needle bearing and a flat bearing are provided between the sleeve 52 and the bush 55, and a flat bearing is provided between the bush 55 and the pulley 56, so that the sleeve 52 can be smoothly rotated.
Even though the fastening point 4 bonding force between the stator core single sheets in embodiment 1 can overcome the rotation inertia of the rotation mechanism, in the actual production, it is found that the center of gravity of the stator core single sheet is already outside the rotation stamping device 5 just before the stator core single sheet falls off from the rotation stamping device 5, as shown in fig. 8, a small amount of twist-off phenomenon still occurs, when the stator core single sheet still has the twist-off phenomenon, two twisted-off sections need to be taken out and collected in time, and the subsequent lamination processing is performed, which may affect the production efficiency, therefore, in this embodiment, in one stator core single sheet, the female die 53 does not rotate when the stator core single sheet at the tail end 6 is stamped and blanked, which may effectively avoid the twist-off of the stator core single sheet due to the rotation inertia, and in order to compensate for the same plate difference of the stator core single sheet at the tail end 6 due to the female die 53 not rotating, in this embodiment, the female die 53 does not rotate nor rotate when the stator core single sheet at And the same-plate difference generated by the stator core monomer pieces at the 6 tail ends is offset, and the section marked with the distance h in fig. 8 and 9 is the stator core monomer piece of which the female die 53 does not rotate during punching blanking.
It should be noted here that when the 6 stator core single sheets at the head end and the tail end are punched and blanked, the corresponding female dies 53 have an angle difference of 180 °, so as to ensure that when the 6 stator core single sheets at the tail end are punched and blanked, a blanking area on the bar stock 1 and a blanking area on the bar stock 1 when the 6 stator core single sheets at the head end are punched and blanked form a central symmetry relationship.
In this embodiment, the total number of stator core unit pieces of one stator core unit block is preferably even number pieces, but when the error between the thickness of the stator core unit block and the set value is large and the total number of stator core unit pieces of one stator core unit block has to be taken as an odd number, it is sufficient to ensure that the number of stator core unit pieces of the middle rotary punching section is even number, and the number of stator core unit pieces punched without the rotation of the head end is one more than that of stator core unit pieces punched without the rotation of the tail end. For example, in the present embodiment, when the total number of the stator core single sheets of one stator core single block is odd, the leading ends of the stator core single sheets punched without the rotation of the female die 53 during the punching and blanking process account for 6 sheets, and the trailing ends of the stator core single sheets punched without rotation of the female die 53 account for 5 sheets; or the head end takes 7 slices and the tail end takes 6 slices.
This embodiment is huge for the stator core size optimization that traditional lamination mode can bring, and the thickness of establishing 1 both ends of strip material is t and t + a respectively, and after m stator core monomer piece stacks, traditional stator core one end thickness is for m t, and the other end is m (t + a), and both ends can be put in order and produce the dimensional error of m a, as shown in fig. 2, to the motor of high accuracy requirement, stator core under the traditional production mode is difficult to satisfy its requirement.
This embodiment has an advantage that the stator core segment is not easily twisted off as compared with embodiment 1.
Certainly, the die 53 with more blanking positions (even number) can be selected according to the width of the bar stock 1, and what corresponds to this is that more blanking slots 57 (even number) are arranged on the rotary punching device 5 to temporarily store the stator core monomer piece, for example, the die with four blanking positions (corresponding to four blanking slots 57) is selected, at this moment, the last punching of the bar stock 1 corresponds to four blanking positions, as shown in fig. 5 or fig. 6, the four blanking positions are centrosymmetric, and when punching and blanking, four stator core monomer pieces are punched and blanked at one time through the matching of the male die 51 and the die 53, and at this moment, higher production efficiency can be realized.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned examples, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. A manufacturing process of a motor stator core is characterized in that: the method comprises the following process steps:
step A, feeding: feeding the strip material into a punch press, so that the strip material can be continuously fed forwards step by step on the punch press;
b, punching a pilot hole: in the process of feeding the strip materials forwards in a stepping manner, punching of the pilot holes is performed on two sides of the strip materials in the length direction after each stepping;
c, punching a metering point or a buckling point: in the process of feeding the strip materials forwards in a stepping manner, stamping a plurality of pairs of metering points or buckling points after each stepping, wherein each pair of metering points or buckling points are distributed in central symmetry about the same point;
step D, blanking: utilize gyration stamping device to carry out the punching press blanking to the strip material, the last die of gyration stamping device is rotatable, is equipped with a plurality of to the material level that falls about the central symmetric distribution of die pivot one-tenth on the die, and the blanking specifically includes:
action d 1: the rotary punching device punches the position of the metering point or the buckling point on the bar material to perform punching blanking, so as to obtain the stator core single sheet temporarily stored in the rotary punching device;
action d 2: the stator core single sheet temporarily stored in the rotary punching device rotates 180 degrees along with the female die of the rotary punching device;
in the process of feeding the strip material forwards in a stepping mode, the action d1 is carried out once when the strip material is fed forwards in a stepping mode, and in the process of repeatedly carrying out the action d1, the action d2 is carried out immediately after at least one action d1 is finished;
the stator core single sheets obtained by multiple times of stamping and blanking are buckled and laminated in the rotary stamping device, and fall off from the rotary stamping device in the form of stator core single blocks after the stator core single sheets are laminated to a certain thickness;
step E, assembling: and splicing the plurality of stator core single blocks falling off from the rotary punching device in an annular manner to obtain a stator core finished product.
2. The manufacturing process of the stator core of the motor according to claim 1, wherein: and D, punching the interval between the two adjacent punching metering points in the step C for the number of times equal to the number of the stator core single sheet sheets punched with the buckling points in one stator core single body block, punching the metering points on the stator core single sheet positioned at the bottommost part of the stator core single body block in one stator core single body block, and punching the buckling points on the other stator core single sheets.
3. The manufacturing process of the stator core of the motor according to claim 2, wherein: and D, detecting the average thickness of the bar stock in advance before the step A, calculating the multiple relation between the average thickness of the bar stock and the set value of the thickness of the stator core single block, and obtaining the number of stator core single sheets required to be punched by one stator core single block, so that the punching times of the interval between two adjacent punching metering points in the step C are controlled, and the thickness of the stator core single block obtained in the step D is closest to the set value.
4. A process for manufacturing a stator core for an electrical machine according to claim 1, 2 or 3, wherein: in step D, immediately after the end of each action D1, an action D2 is performed.
5. A process for manufacturing a stator core for an electrical machine according to claim 1, 2 or 3, wherein: in the step D, in the process of dropping off a group of stator core single blocks, after n times of head and tail actions D1 are finished, no action D2 is carried out, and after the rest times of actions D1 are finished, one action D2 is carried out, so that in the finally dropped stator core single blocks, n stator core single sheets are arranged at the head end and the tail end of the stator core single blocks, and the stator core single sheets are punched and dropped under the condition that a female die of a rotary punching device does not rotate, wherein n is more than or equal to 2 and less than or equal to 20.
6. The manufacturing process of the stator core of the motor according to claim 5, wherein: when the n stator core single sheets at the head end and the tail end are punched and blanked, blanking positions on the two corresponding female dies are centrosymmetric about a female die rotating shaft.
7. A process for manufacturing a stator core for an electrical machine according to claim 1, 2 or 3, wherein: the rotary stamping device comprises a male die capable of reciprocating up and down, a rotatable shaft sleeve is arranged below the male die, a female die and a locking ring are sequentially arranged in the shaft sleeve from top to bottom, a bushing is arranged on the outer side of the shaft sleeve, and a belt pulley is connected below the shaft sleeve; and a plurality of pairs of through charging chutes are arranged on the female die, the locking ring, the shaft sleeve and the belt pulley, and each pair of charging chutes are distributed in central symmetry about the rotating shaft of the shaft sleeve.
8. The manufacturing process of the stator core of the motor according to claim 7, wherein: the top of the shaft sleeve is provided with a positioning hole, and a positioning column sleeve is arranged in the positioning hole.
9. The manufacturing process of the stator core of the motor according to claim 7, wherein: a needle bearing and a plane bearing are arranged between the shaft sleeve and the bushing, and a plane bearing is arranged between the bushing and the belt pulley.
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| CN202011515098.6A CN112260494B (en) | 2020-12-21 | 2020-12-21 | Manufacturing process of motor stator core |
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| CN112260494B true CN112260494B (en) | 2021-02-26 |
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| CN113275459B (en) * | 2021-07-22 | 2021-09-14 | 宁波震裕科技股份有限公司 | Manufacturing process of step type iron core |
| CN113922606B (en) * | 2021-12-10 | 2022-03-01 | 宁波震裕科技股份有限公司 | Manufacturing process of stator core of motor with multiple groups of step winding slots |
| CN114567130B (en) * | 2022-03-18 | 2024-04-26 | 广东美芝精密制造有限公司 | Stator assembly and manufacturing method thereof, motor, rotary compressor and manufacturing method thereof |
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| CN202270827U (en) * | 2011-09-16 | 2012-06-13 | 宁波震裕模具有限公司 | Quick change structure device of rotor groove-shaped concave die in progressive die |
| JP5782955B2 (en) * | 2011-09-22 | 2015-09-24 | トヨタ紡織株式会社 | Manufacturing method of core of rotating electrical machine |
| WO2017154576A1 (en) * | 2016-03-09 | 2017-09-14 | 三菱電機株式会社 | Stator for rotating electric motor, and rotating electric motor |
| CN108043955B (en) * | 2018-01-26 | 2023-09-19 | 宁波震裕科技股份有限公司 | Motor stator and motor rotor iron core sheet molding progressive die and molding process |
| US20210370445A1 (en) * | 2018-04-13 | 2021-12-02 | Ipg Photonics Corporation | Laser assisted machining of electric motor cores |
| CN109546765A (en) * | 2019-01-23 | 2019-03-29 | 宁波菲仕自动化技术有限公司 | A kind of split-type stator core construction and joining method |
| CN209233579U (en) * | 2019-01-23 | 2019-08-09 | 宁波菲仕自动化技术有限公司 | A kind of split-type stator core construction |
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