CN117428271B - Die block forming method of motor iron core blanking die and motor iron core blanking die - Google Patents
Die block forming method of motor iron core blanking die and motor iron core blanking die Download PDFInfo
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- CN117428271B CN117428271B CN202311758396.1A CN202311758396A CN117428271B CN 117428271 B CN117428271 B CN 117428271B CN 202311758396 A CN202311758396 A CN 202311758396A CN 117428271 B CN117428271 B CN 117428271B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000003754 machining Methods 0.000 claims abstract description 73
- 230000000149 penetrating effect Effects 0.000 claims description 26
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 3
- 238000003672 processing method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Abstract
The invention discloses a die block forming method of a motor iron core blanking die and the motor iron core blanking die, which comprise a plurality of concave modules, wherein the concave modules are spliced to form an annular blanking die, the outer periphery of each concave module is a circular arc edge, the inner periphery of each concave module is a straight edge, the two side edges of each concave module are spliced edges matched and spliced with adjacent concave modules, the spliced edges are straight edges, the concave modules are provided with a plurality of slotted holes which are distributed in an annular array with the center of circle centers of circular arc surfaces at the periphery as the center, the slotted holes on the spliced edges at the two sides of the concave modules are half slotted holes, and a spliced blanking die is formed, so that the blanking die cannot be scrapped entirely due to local deformation; the invention also provides a processing method of the female die block of the blanking female die, wherein a local residual edge is reserved in the rough machining process, and two straight edges on the same splicing edge can be positioned on the same straight line to form accurate splicing.
Description
Technical Field
The invention relates to the technical field of motor iron core forming dies, in particular to a die block forming method of a motor iron core blanking die and the motor iron core blanking die.
Background
The motor is widely applied to various life fields, and the motor iron core punching sheet is an important component of the motor, wherein a punching die is an indispensable main link of the motor iron core punching sheet. The groove-shaped female die is an indispensable important part in the die in a single-procedure blanking die or a step blanking die, is of a disc-shaped structure, and is provided with a plurality of slotted holes in a circumferential distribution on the surface. The groove-shaped female die is easy to deform in the continuous blanking process, so that the whole groove-shaped female die is scrapped, the groove-shaped female die is divided into a plurality of partial female dies, then the partial female dies are spliced to form a whole, half slotted holes are formed in two sides of each partial female die, and a complete slotted hole is formed after the partial female dies are spliced. The processing technology has the following problems that the local female die is integrally deformed, so that straight edges on two sides of a half slot hole on the same splicing surface are not on the same straight line, the slot hole on the splicing edge has errors in size, and a sharp corner between the inner periphery and the splicing edge can collapse, so that the complete local female die cannot be formed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a die block forming method of a motor iron core blanking die, which comprises the following steps:
s1, respectively machining and forming a first wire through hole, a second wire through hole and a third wire through hole at the boundary of the to-be-machined area of the blank for forming the shape of the concave module, at the machining position of the slot hole for forming the concave module and at the machining position of the half slot hole for forming the concave module, wherein a plurality of second wire through holes are machined and formed and are arranged at intervals, and the second wire through holes are distributed according to the arc central lines in the to-be-machined area of the blank for obtaining a machined blank;
s2, performing linear cutting rough machining on a machined blank, firstly performing oblique linear wire moving with a first wire passing hole as a starting point to form a right spliced edge, then performing circular arc wire moving leftwards to form a circular arc outer periphery, and then performing oblique linear wire moving downwards to form a left spliced edge, wherein the central lines of the left spliced edge and the right spliced edge are symmetrically distributed along the circular arc outer periphery, so that a third wire passing hole is formed at the side positions of the left spliced edge and the right spliced edge, then performing linear wire moving rightwards to form a linear inner periphery, and returning an electrode wire to the first wire passing hole position to form a die blank, wherein the die blank is provided with an external rough contour, a second wire passing hole and a third wire passing hole; then in the die blank, the electrode wire is processed to form a slotted hole after penetrating into a second wire penetrating hole, and a plurality of slotted holes distributed in a fan shape are formed in a processing mode; finally, the electrode wire penetrates into a third wire penetrating hole of the die blank, wire-moving processing is carried out from the third wire penetrating hole to form a half-slot hole, and the half-slot hole is arranged adjacent to the slot hole, so that the die blank is formed;
s3, in the rough machining process, two partial residual edges are reserved on the circular arc-shaped outer periphery of the female die blank, at least one partial residual edge is reserved on the inner periphery of the female die blank, and stress is removed after machining is completed;
s4, carrying out plane processing on the upper surface and the lower surface of the female die blank;
s5, carrying out primary finish machining on the female die blank, sequentially carrying out finish machining on electrode wires along the outer rough contour of the female die blank and the contour of the inner wall of the slot, wherein the finish machining sequence of the slot is the same as that of the slot in the step S2, the range of the finish machining cutting quantity is 0.03-0.05mm, and leaving all local residual edges to be not machined in the finish machining process;
s6, performing secondary finish machining, namely, the electrode wire machining walking path is a right splicing edge and a left splicing edge, then the arc-shaped outer periphery is arranged, then the inner wall of the slotted hole is arranged, and finally the inner wall of the half slotted hole is arranged, wherein the slotted hole machining sequence is the same as that in the step S5, the cutting amount of the secondary finish machining is in the range of 0.03-0.05mm, and after the inner wall of the half slotted hole is machined, the partial residual edge is machined finally to form the concave module.
Further preferably, in step S3, each partial residual edge on the circular arc-shaped outer periphery is located between two slots closest to the half slots.
Further preferably, in step S1, the method further includes a positioning hole forming step, wherein two fourth wire-passing holes are positioned and formed in the die blank, and each fourth wire-passing hole is subjected to wire passing, so that two positioning holes are formed in the die blank, are positioned between the inner periphery and the slot hole, and are horizontally distributed.
Further preferably, in step S2, for processing the slot hole, the electrode wire is first threaded into the second wire-threading hole to perform wire-threading processing to form a slot hole at the central position, and then the rest slot holes are sequentially processed and opened from left to right with the slot hole at the central position as the center in the direction from the middle to the two sides.
Preferably, the number of the partial residual edges on the inner periphery is two, and the partial residual edges are uniformly distributed along the length direction of the inner periphery.
Preferably, a groove is formed on the inner periphery at the positions of the two partial residual edges to replace the partial residual edges.
Preferably, in step S5, two partial residual edges on the inner periphery are defined as a residual edge one and a residual edge two from left to right, then two partial residual edges on the circular arc-shaped outer periphery are sequentially defined as a residual edge three and a residual edge four in a counterclockwise direction, the four partial residual edges are used as separation points, the whole external rough contour of the die block is separated into four machining contours, and the four machining contours are respectively:
the first contour comprises a partial section, a right splicing edge and a partial section, wherein the inner periphery of the partial section is positioned between the second residual edge and the right splicing edge, and the circular arc-shaped outer periphery of the partial section is positioned between the third residual edge and the right splicing edge;
the second contour is a section of which the outer periphery of the arc is positioned between the third residual edge and the fourth residual edge;
the contour III comprises a partial section with the circular arc-shaped outer periphery positioned between the residual edge IV and the left splicing edge, and a partial section with the left splicing edge and the inner periphery positioned between the residual edge I and the left splicing edge;
the contour IV is a section of the inner periphery between the first residual edge and the second residual edge;
and processing the positioning hole, the first contour, the second contour, the third contour, the fourth contour, the slotted hole and the half slotted hole sequentially.
Preferably, in step S6, symmetrical jump processing is performed when two positioning holes or two symmetrically distributed slots are processed.
Preferably, in S6, each of the machining profile and the profile of the slot may be repeated a plurality of times.
The invention also provides a blanking die for the motor iron core, which comprises a plurality of concave modules, wherein the concave modules are annularly spliced, each concave module is manufactured and molded by the concave module molding method, the manufactured and molded concave module is provided with an arc-shaped outer periphery, an inner periphery, a left spliced edge, a right spliced edge, a plurality of slotted holes distributed in a fan shape, and half slotted holes positioned on the left spliced edge and the right spliced edge, the left spliced edge of one concave module in two adjacent concave modules is attached to the right spliced edge of the other concave module, and the left spliced edge, the right spliced edge and the inner periphery are straight edges.
The invention has the technical effects that the inner periphery and the circular arc-shaped outer periphery of the straight edge are respectively provided with a local residual edge, so that the female die block can be uniformly stressed in the processing process, each slot hole can not deform, two straight edges on the same splicing edge can be positioned on the same straight line to form accurate splicing, and half slot holes of adjacent female die blocks can be accurately spliced finally, and dimensional errors can not occur; the partial residual edge of the inner periphery can be replaced by a groove, namely, the groove is formed at the position of the partial residual edge, so that the final finish machining of the partial residual edge can be omitted, and the machining procedure is saved.
Drawings
FIG. 1 is a block diagram of the female module with a partial residual edge in the correct position;
FIG. 2 is an overall block diagram of a female module with a partial residual edge in the wrong position;
FIG. 3 is an overall block diagram of the female module with the partial remaining edge in another incorrect position;
FIG. 4 is a diagram of the original rough machining path;
FIG. 5 is a now modified rough cut path diagram;
FIG. 6 is a primary finishing path diagram now modified;
FIG. 7 is a schematic diagram of profile one, profile two, profile three, and profile four;
FIG. 8 is a plot of the position of the first, second and third wire-holes;
fig. 9 is a position distribution diagram of the first, second, third and fourth residual sides.
In the figure: 1. a concave module; 2. a circular arc-shaped outer periphery; 3. an inner periphery; 4. splicing edges; 41. a left splicing edge; 42. a right splicing edge; 5. a slot hole; 51. a first hole; 52. a second hole; 53. hole III; 54. a fourth hole; 55. a fifth hole; 56. a sixth hole; 57. kong Qi; 58. hole eight; 59. kong Jiu; 6. a half slot; 7. a local residual edge; 71. residual edge I; 72. residual edges II; 73. residual edges III; 74. a residual edge IV; 8. a groove; 9. positioning holes; 10. A first wire hole; 11. a second wire hole; 12. a third wire hole; 13. a fourth wire hole; a. profile one; b. profile II; c. a third contour; d. and a fourth contour.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
The invention provides a motor iron core blanking die which is formed by splicing a plurality of concave modules 1, wherein the complete blanking die is of a thinner annular structure, the circular arc-shaped outer periphery 2 of each concave module 1 is used as a part of the outer contour of the blanking die, the inner periphery 3 of each concave module 1 is a straight edge, the two sides of each concave module 1 are splicing edges 4 for matching and splicing with adjacent concave modules 1, the splicing edges 4 are straight edges and are divided into a left splicing edge 41 and a right splicing edge 42, so that the concave modules 1 form an isosceles trapezoid structure similar to the circular arc edges.
A plurality of slotted holes 5 are arranged on the concave module 1, the slotted holes 5 are distributed on the surface of the body of the groove 8 in a circumferential array by taking the center of the circular arc surface at the periphery as the center, namely, the slotted holes 5 are distributed in a fan shape on the concave module 1; the slot holes 5 on the splicing edges 4 at two sides of the concave module 1 are all arranged in half, namely, half slot holes 6, when two adjacent half slot holes 6 are symmetrically spliced after the adjacent concave modules 1 are spliced to form a complete slot hole 5, namely, the two half slot holes 6 are symmetrically arranged along the central axis of the width direction of the concave module 1, so that after a plurality of concave modules 1 are spliced, all the slot holes 5 on the concave module 1 can be consistent in shape and position.
Two positioning holes 9 are formed in the surface, close to the inner periphery 3, of the concave module 1, and the two positioning holes 9 are horizontally and uniformly distributed along the length direction of the concave module 1.
The invention also provides a processing method for processing the female die block 1, which comprises the following steps:
s1, wire cutting rough machining is performed on a to-be-machined area of a raw blank, wire penetrating holes are formed before wire cutting, in this embodiment, as shown in FIG. 8, the wire penetrating holes comprise a first wire penetrating hole 10, a second wire penetrating hole 11, a third wire penetrating hole 12 and a fourth wire penetrating hole 13, the first wire penetrating hole 10 is formed at a boundary for forming the shape of the concave module 1, the second wire penetrating hole 11 is formed at a machining position for forming the slot 5 of the concave module 1, the third wire penetrating hole 12 is formed at a machining position for forming the half slot 6 of the concave module 1, and the fourth wire penetrating hole 13 is formed at a machining position for forming the positioning hole 9 of the concave module 1.
S2, firstly, the four wire penetrating holes are sequentially drilled on a blank, then, as shown in fig. 5, the electrode wire is firstly processed in a circular wire penetrating manner along the fourth wire penetrating hole 13 to form positioning holes 9, in the embodiment, the number of the positioning holes 9 is two, the positioning holes 9 are distributed along a horizontal straight line, firstly, the left positioning hole 9 is processed, then, the right positioning hole 9 is processed, after the positioning holes 9 are processed, the electrode wire is moved into the first wire penetrating hole 10 to be used as a cutting starting position to incline to the right for linear wire penetrating, so as to form a right splicing edge 42, the angle is an acute angle beta between the right splicing edge 42 and the horizontal, beta is usually 45 degrees or less than 60 degrees, then the electrode wire is processed to the left for wire penetrating, so as to form an outwards convex arc-shaped path, so as to form an arc-shaped outer periphery 2, then, the electrode wire is downwardly inclined for linear wire penetrating, so as to form a left splicing edge 41, the left splicing edge 41 and the right splicing edge 42 are symmetrically distributed along the center line of the circular arc-shaped outer periphery 2, then the wire is linearly moved rightward to form an inner periphery 3, at this time, the wire electrode returns to the cutting start position, so far as to form a die blank, the die blank has an outer rough contour, a second wire through hole 11 and a third wire through hole 12, the outer contour of the whole die block 1 is similar to a fan shape, then the slot 5 is processed, the slot 5 is rectangular in shape and is arranged along the radial direction of the die block 1, and the slot 5 forms a closed small rectangular shape toward one side of the inner periphery 3, the wire electrode moves to the second wire through hole 11 at the center position of the die block 1, the wire electrode is moved from the second wire through hole 11 to form the slot 5 at the most center position, then the slot 5 is sequentially processed left and right in order from the middle toward two sides with the slot 5 as the center, finally the half slot 6 is opened, the whole deformation of the die block 1 during the perforation can be effectively prevented. As shown in fig. 5, the slot 5 and half slot 6 are formed by machining in the machining sequence of holes one 51 and two 52, holes three 53 and four 54, holes five 55 and six 56, kong Qi and eight 58, and Kong Jiu 59, and as holes eight 58 and Kong Jiu are machined, the wire electrode is moved into each third wire passing hole 12 and then wire machining is performed from the third wire passing hole 12 to form half slot 6.
It should be noted that the above processing sequence is that the positioning hole 9, the outer rough contour, the slot 5 and the half slot 6 are sequentially formed, the fourth wire passing hole 13 is usually formed at the center of the positioning hole 9, and the first wire passing hole 10 is disposed at the cutting start position, that is, the intersection of the right splicing edge 42 and the inner periphery 3; the second threading hole 11 is near the corner of the inner periphery 3; the third threading hole 12 is arranged at the center of the half slot 6, so as to achieve the purpose of shortening the useless stroke.
In the original rough machining path, as shown in fig. 4, two positioning holes 9 are machined first, then the slots 5 are machined, the machining sequence of the slots 5 is from one side to the other side, and then the contour is machined, so that the deformation of the overall contour of the concave module 1 is very easy to be caused when the slots 5 are formed.
Leaving a cutting allowance for finishing during the rough machining;
in the rough machining process, the half slot holes 6 on the two spliced edges 4 are closed, that is, in the machining process, the half slot holes 6 can be firstly machined into a closed hole, so that the spliced edges 4 are complete straight edges, and the spliced edges 4 are positioned on the same straight line on two sides of the half slot holes 6, so that the splicing accuracy is ensured.
S3, in the rough machining process, two partial residual edges 7 are reserved on the circular arc-shaped outer periphery 2 of the die block 1, at least one partial residual edge 7 is reserved on the inner periphery 3, the partial residual edges 7 are normally straight unfinished edges, wherein the partial residual edges 7 on the circular arc-shaped outer periphery 2 are concave, so that the partial residual edges 7 on the circular arc-shaped outer periphery 2 are in a suspended state relative to the circular arc-shaped outer periphery 2 during blanking, and therefore, when the die block 1 is stressed to deform during blanking, the partial residual edges 7 have buffer allowance, and the die block 1 is prevented from cracking; after the machining is finished, the concave module 1 is detached from the machine tool to remove stress;
it should be noted that, as shown in fig. 1, each partial residual edge 7 on the circular arc-shaped outer periphery 2 is located between two slots 5 closest to the half slot 6, so that the whole concave module 1 is uniformly stressed, and the following two error distribution modes are:
1. as shown in fig. 2, the partial residual edge 7 is located at a position between the slot 5 and the half slot 6 near the splicing edge 4, where the partial residual edge 7 is too close to the splicing edge 4, so that the stress of the female die block 1 is uneven, and deformation of the splicing edge 4 is easily caused.
2. As shown in fig. 3, the partial residual edge 7 is opposite to the slot 5 near the splicing edge 4, and the partial residual edge 7 is too close to the slot 5, so that the slot 5 is forced to deform outwards during the suspended state of the residual edge in the blanking process, and the concave module 1 is easy to crack.
S4, carrying out plane processing on each surface of the female die blank, namely, grinding the upper surface and the lower surface of the female die blank to meet the processing requirement;
s5, carrying out primary finish machining on the die blank, sequentially carrying out finish machining on the electrode wire along the outer rough contour of the die blank and the contour of the inner wall of the slot 5, wherein the finish machining sequence of the slot 5 is the same as the machining sequence of the slot 5 in the step S2, the cutting amount range of the finish machining is 0.03-0.05mm, and leaving all local residual edges 7 to be not machined in the primary finish machining process.
S6, performing secondary finish machining on the die blank, firstly machining the spliced edge 4, namely, firstly machining the right spliced edge 42 and then machining the left spliced edge 41, and then machining the circular arc-shaped outer periphery 2 and the inner periphery 3, wherein although the spliced edge 4 and the inner periphery 3 are both straight-line edges, the spliced edge 4 has taper relative to the center line of the circle center of the circular arc-shaped outer periphery 2, and the inner periphery 3 is a horizontal edge and does not have taper, so that two procedures are required to be adopted during machining until the inner periphery 3 and the spliced edge 4 form a preset angle. In addition, during secondary finishing, symmetrical jumping machining is required when machining symmetrical slots 5, so that accumulated errors caused by moving screw rods of a machine tool one by one can be reduced, the partial residual edges 7 are machined in the final step of secondary finishing, and finally, the finished product of the concave module 1 is formed, and the cutting amount range of the secondary finishing is usually set to be 0.03-0.05mm.
It should be noted that the sequence of opening the plurality of slots 5 on the female module 1 is the same as the sequence of opening the rough slots 5.
In this embodiment, the number of partial residual edges 7 on the inner periphery 3 is two, and the partial residual edges are uniformly distributed along the length direction of the inner periphery 3.
In another embodiment, a groove 8 is formed on the inner periphery 3 at the positions of the two partial residual edges 7 to replace the partial residual edges 7, so that the partial residual edges 7 are positioned in the groove 8, and the position of the groove 8 is not required to be processed, thereby saving the processing procedure.
As shown in fig. 7 and 9, two partial residual sides 7 on the inner periphery 3 are defined as a residual side one 71 and a residual side two 72 from left to right, then two partial residual sides 7 on the circular arc-shaped outer periphery 2 are sequentially defined as a residual side three 73 and a residual side four 74 in the counterclockwise direction, and the whole outer rough contour of the concave module 1 is divided into four machining contours with the above four partial residual sides 7 as dividing points, the four machining contours being respectively:
a contour one a comprising a partial section of the inner periphery 3 between the residual edge two 72 and the right stitching edge 42, the right stitching edge 42 and a partial section of the circular-arc-shaped outer periphery 2 between the residual edge three 73 and the right stitching edge 42;
a second contour b, which is a segment of the circular arc-shaped outer periphery 2 between the third residual edge 73 and the fourth residual edge 74;
contour three c, which comprises a partial section of circular arc-shaped outer periphery 2 between residual edge four 74 and left splicing edge 41, a partial section of left splicing edge 41 and inner periphery 3 between residual edge one 71 and left splicing edge 41;
profile four d, which is the section of the inner periphery 3 between the first 71 and second 72 residual edges;
as shown in fig. 6, the complete primary finishing path in step S5 is to machine two positioning holes 9 in sequence from left to right, then machine contour one, contour two b, contour three c and contour four d in sequence, then machine slot 5, the slot 5 machining sequence is the same as the rough machining slot 5 machining sequence, and finally machine half slot 6.
And S6, finally, the local residual edge 7 is refined.
In addition, in step S5, the first contour a, the second contour b, the third contour c, the fourth contour d and the slot 5 may be processed repeatedly, so that each contour can be precisely added in place.
The present invention is not limited to the above-described preferred embodiments, and any person who can obtain other various products under the teaching of the present invention, however, any change in shape or structure of the product is within the scope of the present invention, and all the products having the same or similar technical solutions as the present application are included.
Claims (7)
1. The die block forming method of the motor iron core blanking die is characterized by comprising the following steps of:
s1, processing and forming a first wire through hole (10), a second wire through hole (11) and a third wire through hole (12) respectively at the boundary of the blank to be processed, which is used for shaping the outline of the concave module (1), a processing station used for shaping the slot hole (5) of the concave module (1) and a processing station used for shaping the half slot hole (6) of the concave module (1), wherein a plurality of second wire through holes (11) are processed and formed and are arranged at intervals, and the plurality of second wire through holes (11) are distributed according to the arc central line in the blank to be processed so as to obtain a processed blank;
s2, performing linear cutting rough machining on a machined blank, firstly performing oblique linear wire moving with a first wire passing hole (10) as a starting point to form a right spliced edge (42), then performing circular arc wire moving leftwards to form a circular arc-shaped outer periphery (2), then performing oblique linear wire moving downwards to form a left spliced edge (41), wherein the left spliced edge (41) and the right spliced edge (42) are symmetrically distributed along the central line of the circular arc-shaped outer periphery (2), so that a third wire passing hole (12) is formed at the side positions of the left spliced edge (41) and the right spliced edge (42), then performing linear wire moving rightwards to form a linear inner periphery (3), and returning an electrode wire to the position of the first wire passing hole (10), so as to form a die blank, wherein the die blank is provided with an outer thick profile, a second wire passing hole (11) and the third wire passing hole (12); then in the die blank, the electrode wire is processed to form a slot (5) after penetrating into a second wire penetrating hole (11), and a plurality of fan-shaped slot holes (5) are formed in a processing mode; finally, the electrode wire penetrates into a third wire penetrating hole (12) of the female die blank, wire feeding processing is carried out from the third wire penetrating hole (12) to form a half-slot hole (6), the half-slot holes (6) on the left splicing edge (41) and the right splicing edge (42) are closed, the half-slot holes (6) are arranged adjacent to the slot holes (5), the electrode wire penetrates into the second wire penetrating hole (11) firstly to carry out wire feeding processing to form slot holes (5) at the central position, and then the rest slot holes (5) are sequentially processed left and right by taking the slot holes (5) at the central position as the center according to the sequence from the middle to the two sides;
s3, in the rough machining process, two partial residual edges (7) are reserved on the circular arc-shaped outer periphery (2) of the die blank, and the two partial residual edges (7) on the circular arc-shaped outer periphery (2) are respectively positioned between two slotted holes (5) closest to the half slotted holes (6) on two sides; two partial residual edges (7) are reserved on the inner periphery (3) and are uniformly distributed along the length direction of the inner periphery (3), and stress is removed after the processing is finished;
s4, carrying out plane processing on the upper surface and the lower surface of the female die blank;
s5, carrying out primary finish machining on the female die blank, sequentially carrying out finish machining on electrode wires along the outer rough contour of the female die blank and the contour of the inner wall of the slot hole (5), wherein the finish machining sequence of the slot hole (5) is the same as that of the slot hole (5) in the step S2, the range of the finish machining cutting quantity is 0.03-0.05mm, and leaving all local residual edges (7) to be not machined in the finish machining process;
s6, performing secondary finish machining, wherein the wire electrode machining walking path is a right splicing edge (42) and a left splicing edge (41), the arc-shaped outer periphery (2) is arranged on the wire electrode machining walking path, the inner wall of the slotted hole (5) is arranged on the wire electrode machining walking path, the inner wall of the half slotted hole (6) is arranged on the wire electrode machining walking path, the machining sequence of the slotted hole (5) is the same as that of the slotted hole (5) in the step S5, the cutting amount of the secondary finish machining is in the range of 0.03-0.05mm, and after the inner wall of the half slotted hole (6) is machined, the partial residual edge (7) is machined to form the concave module (1).
2. The method for forming the die block of the motor core blanking die according to claim 1, further comprising a positioning hole (9) forming step of positioning and forming two fourth wire passing holes (13) in the die blank, and wire feeding is performed on each fourth wire passing hole (13) so that two positioning holes (9) are formed in the die blank, and the two positioning holes (9) are located at positions between the inner periphery (3) and the slot holes (5) and are horizontally distributed.
3. The method for forming a die block of a motor core die according to claim 1, characterized in that the inner perimeter (3) is provided with a recess (8) at the position of both partial residual edges (7) to replace the partial residual edges (7).
4. The method for forming a die block of a motor core die according to claim 1, characterized in that in step S5, two partial residual edges (7) on the inner periphery are defined as a residual edge one (71) and a residual edge two (72) from left to right, then two partial residual edges (7) on the circular arc-shaped outer periphery (2) are sequentially defined as a residual edge three (73) and a residual edge four (74) in a counterclockwise direction, the four partial residual edges (7) are used as separating points, and the whole external rough profile of the die block (1) is separated into four processing profiles, which are respectively:
a first contour (a) comprising a partial section of the inner periphery (3) between the residual side two (72) and the right splicing side (42), the right splicing side (42) and a partial section of the circular arc-shaped outer periphery (2) between the residual side three (73) and the right splicing side (42);
a contour II (b), which is a section of the circular arc-shaped outer periphery (2) between the residual edge III (73) and the residual edge IV (74);
a third contour (c) comprising a partial section of the circular arc-shaped outer periphery (2) between the residual edge four (74) and the left splicing edge (41), the left splicing edge (41) and a partial section of the inner periphery (3) between the residual edge one (71) and the left splicing edge (41);
profile four (d), which is the section of the inner periphery (3) between the residual edge one (71) and the residual edge two (72);
the machining is sequentially performed along the sequence of the positioning hole (9), the first contour (a), the second contour (b), the third contour (c), the fourth contour (d), the slot hole (5) and the half slot hole (6).
5. The method for forming a die block of a blanking die for a motor core according to claim 2, characterized in that in step S6, symmetrical jump machining is performed when machining two positioning holes (9) or two symmetrically distributed slots (5).
6. The method for forming a die block for blanking a die for a motor core according to claim 5, characterized in that in S6 each machining profile and the profile of the slot (5) can be repeated a plurality of times.
7. The motor iron core blanking die is characterized by comprising a plurality of concave modules (1), wherein the concave modules (1) are annularly spliced, each concave module (1) is manufactured and molded by the concave module molding method according to any one of claims 1-6, the concave modules (1) manufactured and molded are provided with an arc-shaped outer periphery (2), an inner periphery (3), a left splicing edge (41), a right splicing edge (42), a plurality of slotted holes (5) distributed in a fan shape, and half slotted holes (6) positioned on the left splicing edge (41) and the right splicing edge (42), the left splicing edge (41) of one concave module (1) and the right splicing edge (42) of the other concave module (1) in two adjacent concave modules (1) are attached, and the left splicing edge (41), the right splicing edge (42) and the inner periphery (3) are all straight edges.
Priority Applications (1)
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| FR781980A (en) * | 1934-02-15 | 1935-05-25 | Gleason Works | Method of size of gears, and milling cutter for its practice |
| WO1983001403A1 (en) * | 1981-10-19 | 1983-04-28 | Johnson, Romain, H. | Die forming method and machine |
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| CN117428271A (en) | 2024-01-23 |
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