CN112705614B

CN112705614B - Stack riveting die for motor stator punching sheet

Info

Publication number: CN112705614B
Application number: CN202011392985.9A
Authority: CN
Inventors: 夏辰宇; 袁峥; 田井呈; 黄厚佳
Original assignee: Zhejiang PanGood Power Technology Co Ltd
Current assignee: Zhejiang PanGood Power Technology Co Ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2023-02-24
Anticipated expiration: 2040-12-02
Also published as: CN112705614A

Abstract

The invention provides a laminated riveting die of a motor stator punching sheet, which is used for processing a material belt to form the punching sheet with laminated riveting points and comprises the following components: the female die insert is provided with a positioning hole blanking groove, a stack riveting forming groove and a step positioning hole; the male die assembly comprises a positioning hole male die, a stacking riveting male die and a positioning hole guide pin, wherein the positioning hole male die is matched with the positioning hole blanking groove so that a positioning hole is formed in a moving material belt, the positioning hole guide pin penetrates through the formed positioning hole and is matched with the step pitch positioning hole so that a stacking riveting point is formed by matching the stacking riveting male die and the stacking riveting forming groove, and in the process that the stage separating male die is matched with the stage separating hole to form a stage separating hole part, the feeding step pitch of the material belt is increased, and the position accuracy of the stacking riveting point and the stage separating hole part is guaranteed.

Description

Stack riveting die for motor stator punching sheet

Technical Field

The invention relates to the field of dies, in particular to a laminating and riveting die for motor stator punching sheets.

Background

The motor stator is a key part of the motor, is generally formed by laminating silicon steel punching sheets with magnetic conductivity, and has high quality, particularly the flatness and the verticality of the surface, which directly influence the performance of the motor. In the prior art, stacked riveting points are formed on silicon steel punching sheets, and multiple silicon steel punching sheets are riveted together by using the stacked riveting points, so that the formation of the stacked riveting points can affect the formation of a subsequent stator, for example, the positions of the stacked riveting points on each silicon steel punching sheet are not uniform, the structure of a stacked stator semi-finished product is different from the structure of a stator required by design, and the processing and formation of the subsequent stator are affected.

Disclosure of Invention

In order to solve the problems, the invention provides the riveting die for the motor stator punching sheet, which effectively improves the machining precision and has high automation degree.

The utility model provides a fold die of riveting of motor stator punching for forming the punching that has fold riveting point to material area processing, include:

the female die insert is provided with a positioning hole charging groove, a stacking and riveting forming groove and a step positioning hole;

the male die assembly comprises a positioning hole male die, a riveting male die and a positioning hole guide pin, the positioning hole male die is matched with the positioning hole blanking groove so that a positioning hole is formed in a moving material belt, and the positioning hole guide pin penetrates through the formed positioning hole and is matched with the step pitch positioning hole so that when the material belt is matched with the riveting male die and the riveting forming groove to form a riveting point, the position precision of the riveting point is improved.

Optionally, the male die assembly further comprises a blanking male die, the female die insert is provided with a blanking hole matched with the blanking male die, and the blanking hole is located on one side, away from the positioning hole blanking groove, of the overlapped riveting forming groove.

Optionally, the male die assembly further comprises a platform dividing male die, the female die insert is provided with a platform dividing hole matched with the platform dividing male die, and the platform dividing hole is located between the overlapped rivet forming groove and the blanking hole.

Optionally, the die insert further comprises a guide post, the guide post is arranged perpendicular to the die insert, and the male die assembly is slidably connected to the guide post.

Optionally, the die insert is mounted on the die, the die is sleeved on the guide post, the positioning hole male die, the riveting male die, the positioning hole guide pin and the blanking male die are fixed on the fixing plate, and the fixing plate is sleeved on the guide post.

Optionally, the material pressing device further comprises a material pressing plate, wherein the material pressing plate is sleeved on the guide post and located between the fixing plate and the female die so as to press the material belt.

Optionally, a second fastening piece is mounted on the pressure plate, the second fastening piece is slidably connected with the fixing plate, a spring is sleeved on the second fastening piece, and the spring is located between the fixing plate and the pressure plate.

Optionally, the female die is provided with at least two material blocking pins, and the material blocking pins are respectively clamped on two sides of the material belt.

Optionally, the riveting device further comprises a waste cutter, wherein the waste cutter is fixed on the fixing plate and is positioned on one side of the blanking male die, which is far away from the riveting male die.

Optionally, the die handle is further included, the die handle is fixed to one side, away from the pressure plate, of the fixing plate, and a third through hole of the partition terrace die, through which the partition terrace die penetrates, is formed in the die handle.

Compared with the prior art, the technical scheme has the following advantages:

the positioning hole male die is matched with the positioning hole charging chute to form a positioning hole in the material belt, then the positioning hole guide pin penetrates through the positioning hole and is matched with the step pitch positioning hole to form a stacked riveting point in a matching mode of the stacked riveting male die and the stacked riveting forming groove, and in the process that the platform separating male die is matched with the platform separating hole to form a platform separating hole portion, the feeding step pitch of the material belt is increased, and the position accuracy of the stacked riveting point and the platform separating hole portion is guaranteed. In addition, the material belt is continuously conveyed, so that the male die assembly punches the material belt to continuously form a plurality of punching sheets with overlapped riveting points, and the working efficiency and the yield are effectively improved.

The invention is further described with reference to the following figures and examples.

Drawings

FIG. 1 is a schematic structural view of a laminated riveting die of a motor stator punching sheet according to the invention;

FIG. 2 is a sectional view of a laminated riveting die of a motor stator punching sheet along one direction;

fig. 3 is a cross-sectional view of the riveting die of the motor stator punching sheet along another direction;

fig. 4 is a cross-sectional view of the laminated riveting die of the motor stator punching sheet along another direction;

FIG. 5 is a schematic structural view of the die insert of the present invention;

FIG. 6 is a schematic structural view of the base plate of the present invention;

FIG. 7 is a schematic structural view of the female die of the present invention;

FIG. 8 is a schematic view of the fixing plate according to the present invention;

FIG. 9 is a schematic structural view of the pressure plate of the present invention;

FIG. 10 is a schematic view of the structure of the mold handle according to the present invention;

FIG. 11 is a schematic structural diagram of the male riveting stack of the invention;

FIG. 12 is a schematic structural view of the terrace die of the invention;

FIG. 13 is a schematic structural view of the blanking male die of the invention;

fig. 14 to 18 are flow charts of methods of the riveting die for the motor stator punching sheet according to the present invention;

FIG. 19 is a schematic structural view of the stamped steel of the present invention;

fig. 20 is a schematic view of a stator assembly of an electric machine according to the present invention;

FIG. 21 is a schematic view of the structure of the substrate semi-finished product of the present invention;

FIG. 22 is a schematic structural view of a semi-finished gear body of the present invention;

fig. 23 is a schematic structural view of the assembly of the base plate and the tooth element body according to the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

As shown in fig. 1 to 5, the riveting die for motor stator punching is used for processing a material strip 1700 to form a punching with riveting points 1720, and includes:

the die insert 400 is provided with a positioning hole charging groove 410, a stacking and riveting forming groove 430 and a step positioning hole 420;

the male die assembly comprises a positioning hole male die 800, a stack-riveting male die 1000 and a positioning hole guide pin 900, wherein the positioning hole male die 800 is matched with the positioning hole blanking slot 410 so that the moving material strip 1700 forms a positioning hole 1710, and the positioning hole guide pin 900 penetrates through the formed positioning hole 1710 and is matched with the step pitch positioning hole 420 so that when the stack-riveting male die 1000 is matched with the stack-riveting forming slot 430 to form a stack-riveting point 1720, the position accuracy of the stack-riveting point is improved.

The positioning hole male die 800 is opposite to the positioning hole blanking slot 410, the riveting male die 1000 is opposite to the riveting forming slot 430, and the positioning hole guide pin 900 is opposite to the step positioning hole 420, and moves towards the die insert 400 through the male die assembly, so that the material belt forms a positioning hole 1710 and a riveting point 1720. And the positioning hole 1710 formed on the material belt is matched with the positioning hole guide pin 900, so that the position precision of the riveting point 1720 is improved.

Specifically, the material strip 1700 passes through the die nest 400, sequentially passes through the positioning hole blanking groove 410 and the stacking rivet forming groove 430, and is matched with the positioning hole blanking groove 410 through the positioning hole male die 800 to form the positioning hole 1710 on the material strip 1700, waste materials formed by punching can directly fall into the positioning hole blanking groove 410, and then are matched with the stacking rivet forming groove 430 through the stacking rivet male die 1000 to form the stacking rivet point 1720 on the material strip 1700, and in the process of forming the stacking rivet point, the positioning hole guide pin 900 is matched with the step positioning hole 420 to improve the feeding step of the material strip, so that the position accuracy of the stacking rivet point is ensured.

As shown in fig. 5, the positioning hole feeding groove 410 and the rivet overlapping forming groove 430 are arranged along the moving direction of the material tape, so that the material tape first passes through the positioning hole feeding groove 410 and then passes through the rivet overlapping forming groove 430, the step positioning hole 420 and the positioning hole feeding groove 410 are positioned on the same straight line, and the step positioning hole 420 is positioned on the side of the positioning hole feeding groove 410 facing the rivet overlapping forming groove 430. Preferably, the center of the positioning hole feeding trough 410 is connected with the center of the step positioning hole 420, and the center of the positioning hole feeding trough is perpendicular to the center of the overlap rivet forming trough 430 and the step positioning hole 420. The center of the positioning hole chute 410 is connected to the center of the step positioning hole 420, and the center is parallel to the moving direction of the material belt.

With reference to fig. 5, the number of the positioning hole blanking slots 410 is two, the positioning hole male dies 800 are respectively disposed on two sides of the rivet-stacking forming slot 430, the number of the positioning hole male dies 800 is the same as that of the positioning hole blanking slots 410, and the number of the positioning hole male dies 800 is also two, and each positioning hole male die 800 corresponds to one positioning hole blanking slot 410, so that the positioning holes are respectively formed on two sides of the material tape. Similarly, the number of the step positioning holes 420 may be two, and the step positioning holes are respectively located on two sides of the die insert 400, each step positioning hole 420 is opposite to one positioning hole charging chute 410, and at this time, the number of the positioning hole guide pins 900 is also two, so as to correspond to the positioning holes formed on two sides of the material strip, and the feeding step of the material strip is further increased by positioning on two sides of the material strip. Of course, the number of the step positioning holes 420 and the positioning hole guide pins 900 may be more than two.

As shown in fig. 3 to 5, the punch assembly further includes a blanking punch 1200, the die insert 400 is provided with a blanking hole 450 matched with the blanking punch 1200, and the blanking hole 450 is located on one side of the rivet-stacking forming groove 440 away from the positioning hole blanking groove 430, and is used for punching the material strip to form a punched piece and dropping into the blanking hole 450.

Referring to fig. 5, the blanking hole 450 is located between two of the positioning hole blanking slots 410 and on the side of the step positioning hole 420 facing away from the positioning hole blanking slots 410.

The shape of the blanking hole 450 and the blanking punch 1200 determine the shape of the punch, which in one embodiment is rectangular. Therefore, punching sheets with different sizes can be obtained by replacing the blanking hole 450 and the blanking convex die 1200.

Since the material belt is continuously conveyed, a plurality of punching sheets with overlapped riveting points can be continuously formed in a punching mode, and therefore the positioning hole male die 800, the overlapped riveting male die 1000, the positioning hole guide pin 900 and the blanking male die 1200 can fall down simultaneously, so that the material belt can form positioning holes, the overlapped riveting points and the punching sheets at the same time, the positioning holes are used for positioning and forming of the next overlapped riveting point, and the overlapped riveting points are overlapped riveting points on the next punching sheet.

It is worth noting that the punching sheet can be molded by matching the positioning hole guide pin 900 with the step pitch positioning hole 420, so as to ensure the position accuracy of the overlapped riveting point.

As shown in fig. 3 to fig. 5, the male die assembly further includes a stepped male die 1100, the die insert 400 is provided with a stepped hole 440 matched with the stepped male die 1100, and the stepped hole 440 is located between the rivet-stack forming groove 430 and the blanking hole 450, and is used for punching the material strip to form a corresponding stepped hole portion. Punching sheets are continuously formed, and stators are laminated and riveted according to the number of sheets required by design, so that after the punching sheet of one stator semi-finished product is completed, a separating hole needs to be punched to separate another stator semi-finished product, the separating hole corresponds to a laminating and riveting point, and the formed laminating and riveting point is subjected to separating hole part punching treatment by matching the separating convex die 1100 with the separating hole 440. Further, the positioning hole male die 1100, the riveting male die 1000, the positioning hole guide pin 900 and the blanking male die 1200 are continuously and intermittently dropped at the same time, and the separate male die 1100 is independently dropped relative to the other male dies.

Referring to fig. 5, the branch holes 440 are long holes and can cover the formed rivet overlapping points to punch and remove the rivet overlapping points, so as to obtain branch hole portions, and the removed waste materials can fall into the branch holes 440.

The operation of the stepped male die 1100 can simultaneously utilize the cooperation of the positioning hole guide pin 900 and the step positioning hole 420, thereby ensuring the position accuracy of the stepped hole portion forming. Specifically, the number of the step positioning holes 420 is four, two of the step positioning holes 420 are located on two sides of the clinch forming groove 430, and the other two step positioning holes 420 are located on two sides of the separating holes 440, at this time, the number of the positioning hole guide pins 900 is also four, and each positioning hole guide pin 900 corresponds to one step positioning hole 420.

It should be noted that, in the same side of the rivet-stacking forming groove 430, the distance between the positioning hole feeding groove 410 and the adjacent step positioning hole 420 is equal to the distance between two adjacent step positioning holes 420.

As shown in fig. 1 to 4, 6 and 7, the riveting die for motor stator lamination further includes a female die 300 and a bottom plate 100, the female die 300 is fixed on the bottom plate 100, and the female die insert 400 is mounted on the female die 300.

Specifically, the female die 300 is fixed to the base plate 100 by a first fastening member a 01. Referring to fig. 6 and 7, a bottom plate threaded hole 120 is formed in the bottom plate 100, a female die threaded counter bore 340 is formed in the female die 300, and the first fastener a01 penetrates through the female die threaded counter bore 340 and is in threaded connection with the bottom plate threaded hole 120, so that the female die 300 is fixed to the bottom plate 100. The first fastening member a01 may be a bolt, and the number thereof may be plural, so as to improve the connection strength of the two.

The die insert 400 is clamped on the die 300. Referring to fig. 7, a die mounting hole 320 is formed in the die 300, so that the die insert 400 is clamped in the die mounting hole 320.

With continued reference to fig. 3 and 6, the bottom plate 100 is provided with a bottom plate waste chute 130, and when the female die 300 is mounted on the bottom plate 100, the female die mounting hole 320 is opposite to the bottom plate waste chute 130, so that waste falling into the positioning hole waste chute 410 and the like can fall into the bottom plate waste chute 130.

With continued reference to fig. 3 and 4, the bottom plate 100 is provided with a bottom plate blanking groove 140, and when the female die 300 is mounted on the bottom plate 100, the blanking hole 450 of the female die insert 400 mounted on the female die 300 is opposite to the bottom plate blanking groove 140, so that the punching sheet enters the bottom plate blanking groove 140 through the blanking hole 450 to be stacked.

As shown in fig. 1, 2 and 7, the female die 300 is provided with material blocking pins 500 respectively clamped on two sides of the material strip to limit the material strip, so that the moving direction of the material strip keeps a straight line. Referring to fig. 7, a material stopping pin mounting hole 330 is formed in the die 300, and the material stopping pin 500 is inserted into the material stopping pin mounting hole 300, so that the material stopping pin 500 is fixed to the die 300.

In one embodiment, the number of the material blocking pin mounting holes 330 is four, two of the material blocking pin mounting holes 330 are located on one side of the female die mounting hole 320, the other two material blocking pin mounting holes 330 are located on the other side of the female die mounting hole 320, and the two material blocking pin mounting holes 330 on each side of the female die mounting hole 3320 respectively correspond to two sides of the material belt, so that the two material blocking pins 500 thereon are respectively clamped on two sides of the material belt, and further the moving direction of the material belt is limited, thereby improving the yield of the punching sheet.

Referring to fig. 5, the striker pin 500 is L-shaped.

As shown in fig. 1 and 2, the stack riveting die for motor stator punching further includes a fixing plate 700 and a guide pillar 200, the guide pillar 200 is fixed on the base plate 100, the locating hole male die 800, the stack riveting male die 1000, the locating hole guide pin 900 and the blanking male die 1200 are fixed on the fixing plate 700, and the fixing plate 700 is slidably connected to the guide pillar 200, so that the male die assembly on the fixing plate 700 moves up and down along the axial direction of the guide pillar 200.

Referring to fig. 2 and 6, a guide post mounting hole 110 is formed in the bottom plate 100, and the guide post 200 is mounted in the guide post mounting hole 110, so that the guide post 200 is fixed to the bottom plate 100. The number of the guide pillars 200 may be plural to improve the stability of the movement of the fixing plate 700.

Referring to fig. 2 and 7, the guide post 200 is slidably coupled to the fixing plate 700 through the female die 300. The female die 300 is provided with a female die through hole 310 through which the guide post 200 passes.

As shown in fig. 8, the fixing plate 700 is provided with a positioning hole male die mounting hole 720, a rivet-stacked male die mounting hole 740, a positioning hole guide pin mounting hole 730, a blanking male die mounting hole 760, and a stepped male die first through hole 750, and the positions of the mounting holes determine the positions of the male dies, for example, the positioning hole male die 800 is inserted into the positioning hole male die mounting hole 720 and is opposite to the positioning hole blanking slot 410 of the die insert 400. The positions of the positioning hole male die mounting hole 720, the stacked riveting male die mounting hole 740, the positioning hole guide pin mounting hole 730, the blanking male die mounting hole 760 and the stage-dividing male die first through hole 750 can refer to the holes on the die insert 400, and refer to fig. 5.

With continued reference to fig. 8, the fixing plate 700 may further have a first guide post through hole 710 through which the guide post 200 passes, so that the guide post 200 passes through the first guide post through hole 710, and the fixing plate 700 moves along the axial direction of the guide post 200, as shown in fig. 1.

The guide posts 200 are perpendicular to the female die 300 and the fixing plate 700, respectively.

As shown in fig. 1 to 4 and fig. 4, the rivet stack mold for motor stator punching further includes a pressing plate 1400, wherein the pressing plate 1400 is sleeved on the guide post 200 and located between the fixing plate 700 and the female die 300, and the material strap is located between the pressing plate 1400 and the female die 300. The material pressing plate 1400 can move along the axial direction of the guide post 200, so that the movement of the material belt is not affected, and when the fixing plate 700 moves downwards, the material pressing plate 1400 is driven to move downwards, so that the material belt is fixed between the material pressing plate 1400 and the female die 300, and the forming precision of the punching sheet and the upper overlapped riveting point thereof is improved.

As shown in fig. 9, the material pressing plate 1400 is provided with a positioning hole male die through hole 1420, a rivet stacking male die through hole 1440, a positioning hole guide pin through hole 1430, a blanking male die through hole 1460, a stage separating male die second through hole 1450, and a guide pillar second through hole 1410. The position of the upper hole of the die insert 400 is opposite to that of the upper hole of the die insert 400, so that the pressure plate 1400 is free from the positioning hole male die 800, the riveting male die 1000, the positioning hole guide pin 900, the blanking male die 1200 and the separating male die 1100.

As shown in fig. 1 and fig. 2, the pressure pad 1400 moves against the elastic force of the spring 1500, specifically, the second fastening member B02 is installed on the pressure pad 1400, the second fastening member B02 is slidably connected to the fixing plate 700, the spring 1500 is sleeved on the second fastening member B02, and the spring 1500 is located between the fixing plate 700 and the pressure pad 1400, so that the pressure pad 1400 moves against the elastic force of the spring 1500, and thus when the fixing plate 700 moves upwards, the pressure pad 1400 can be driven to move upwards, so that the material strap can be conveyed and moved, and when the fixing plate 700 moves downwards, the pressure pad 1400 presses against the material strap against the elastic force of the spring 1500, so as to prevent the material strap from being damaged.

Specifically, referring to fig. 9, a limiting threaded hole 1480 is formed in the pressure plate 1400, and the second fastening member B02 is screwed to the limiting threaded hole 1480. A material blocking pin avoiding groove 1470 for avoiding the material blocking pin 500 is further formed in the material pressing plate 1400, when the material pressing plate 1400 presses on the female die 300, the protruding material blocking pin 500 is inserted into the material blocking pin avoiding groove 1470, and the material pressing plate 1400 cannot press the material belt.

Referring to fig. 8, a fixing plate bolt counter bore 780 is formed in the fixing plate 700, and the second fastening member B02 may be a bolt, which passes through the fixing plate bolt counter bore 780 to be screwed with a limit threaded hole 1480 of the pressure plate 1400, so that the second fastening member B02 is slidably connected to the fixing plate 700.

As shown in fig. 1 to 4, the riveting die for motor stator punching sheets further includes a waste material knife 1300, the waste material knife 1300 is fixed to a side surface of the fixing plate 700, and the waste material knife 1300 is located at a side of the blanking male die 1200 departing from the riveting male die 1000, so as to perform waste material cutting on the punched material tape.

The fixing plate 700 drives the riveting male die 1000 and the like to move downwards and punch the material belt, and simultaneously drives the waste material cutter 1300 to cut waste materials of the material belt.

Specifically, referring to fig. 8, a waste knife mounting hole 770 is formed in a side surface of the fixing plate 700, and the waste knife mounting hole 700 is located on a side of the blanking punch mounting hole 760 facing away from the riveting punch mounting hole 740, so that a waste knife 1300 fixed on the waste knife mounting hole 770 is located on a side of the blanking punch 1200 facing away from the riveting punch 1000.

In one embodiment, the waste knife 1300 is inserted into the waste knife mounting hole 770.

In another embodiment, the waste knife 1300 may be bolted into the waste knife mounting hole 770.

As shown in fig. 1 to 4, a slide plate 600 is disposed on the base plate 100, and the slide plate 600 is opposite to the scrap cutter 1300 and is adjacent to the female die 300, so that the cut scrap slides out along the slide plate 600. Of course, the slide plate 600 may be fixed to the female die 300.

Referring to fig. 6, the base plate 100 is provided with a slide plate screw hole 150 for connecting a slide plate 600, and the connection between the two can be realized by a fastener.

As shown in fig. 1 to 4 and 10, the rivet-stacking die for motor stator punching sheets further comprises a die handle 1600, the die handle 1600 is fixed on the fixing plate 700 deviating from one side of the material pressing plate 1400, the die handle 1600 is connected to a clamping device on a punching machine, and is driven by the punching machine to move up and down the male die assembly so as to punch the material strip.

Referring to fig. 10, a punch chuck 1610 is provided on the die shank 1600 for chucking a machine tool. The die handle 1600 is provided with the die handle counter bore 1630, referring to fig. 8, the fixing plate 700 is provided with a third fastener mounting threaded hole 790, and the third fastener B03 passes through the die handle counter bore 1630 and is screwed with the third fastener mounting threaded hole 790, so as to fix the die handle 1600 and the fixing plate 700.

Continuing to refer to fig. 10, a die shank avoiding hole 1640 is formed in the die shank 1600 for avoiding the second fastener B02, and referring to fig. 2, the die shank avoiding hole 1640 is opposite to the fixing plate bolt counter bore 780, so that the second fastener B02 can be mounted.

With reference to fig. 10, a third guide pillar via 1620 is further disposed on the die handle 1600, so that the guide pillar 200 can pass through the third guide pillar via 1620, so as to achieve the sliding connection between the die handle 1600 and the guide pillar 200.

With continued reference to fig. 10, a third stepped male die via hole 1650 is further formed in the die shank 1600, so that the stepped male die 1100 passes through the third stepped male die via hole 1650, which is shown in fig. 4. So that the stage-dividing male die 1100 can independently move relative to the positioning hole male die 800 and the like.

In summary, the pilot hole punch 800 is first matched with the pilot hole blanking slot 410 to form a pilot hole in the tape, and then the pilot hole guide pin 900 is used to penetrate through the pilot hole and match with the step pitch pilot hole 420 to improve the feeding step pitch of the tape during the process that the insert-riveting punch 1000 matches with the insert-riveting forming slot 430 to form an insert-riveting point, and the insert-molding punch 1100 matches with the insert-molding hole 440 to form an insert-molding hole, so as to ensure the position accuracy of the insert-riveting point and the insert-molding hole. In addition, the material belt is continuously conveyed, so that the male die assembly punches the material belt to continuously form a plurality of punching sheets with overlapped riveting points, the automation degree is high, and the working efficiency and the yield are effectively improved.

The laminated riveting die is used for stamping a stamped sheet with laminated riveting points, then a stator semi-finished product is formed by laminating, and finally a stator is formed by cutting. Referring to fig. 20 to 23, the stator assembly 1 of the electric motor includes a plurality of base plates 11 and a plurality of tooth members 12, wherein the plurality of base plates 11 are spliced to form an annular structure, and each of the base plates 11 is spliced to one of the tooth members 12. Specifically, the plurality of gear bodies 12 are sequentially clamped on the splicing base 13, so that the plurality of gear bodies 12 are annularly arranged, and then one substrate 11 is sequentially spliced on each gear body 12, so that the plurality of substrates 11 are sequentially spliced to form a closed annular structure.

Referring to fig. 23, the base plate 11 is provided with a base plate concave portion 111, and the gear body 12 is provided with the gear body convex portion 121 engaged with the base plate concave portion 111. The base plate 11 and the gear body 12 are joined by the cooperation of the base plate concave part 111 and the gear body convex part 121.

The riveting die can be correspondingly processed to form a base plate semi-finished product and a punching sheet of a tooth part semi-finished product, and refer to fig. 21 and 22. Specifically, the shapes of the riveting male die 1000, the blanking male die 1200 and the like are changed. The following are presented by way of two examples:

first embodiment

The riveting die of the present embodiment is corresponding to the punching sheet processing of the substrate semi-finished product, and referring to fig. 21, two substrate concave portions 111 are arranged on the side surface of the substrate semi-finished product, and two substrate riveting points 112 are arranged at the end of the substrate semi-finished product. Wherein two substrate riveting points 112 can be arranged transversely.

As shown in fig. 1 to 4 and 11 to 13, the stack riveting die for motor stator punching sheets includes a female die insert 400 and a male die assembly, the female die insert 400 is provided with a positioning hole blanking groove 410, a stack riveting forming groove 430, a step positioning hole 420, a blanking hole 450 and a separating hole 440, and the male die assembly includes a positioning hole male die 800, a stack riveting male die 1000, a positioning hole guide pin 900, a blanking male die 1200 and a separating male die 1100.

Referring to fig. 5, the number of the overlapped riveting forming grooves 430 is two, and referring to fig. 11, two overlapped riveting bosses 1010 are arranged on the overlapped riveting male die 1000, and each overlapped riveting boss 1010 corresponds to one overlapped riveting forming groove 430, so as to form two substrate overlapped riveting points 112 at the end of the substrate semi-finished product, referring to fig. 21.

With reference to fig. 5, the number of the stage holes 440 is two, and with reference to fig. 12, two stage bosses 1120 are provided on the stage punch 1100, and each stage boss 1120 corresponds to one stage hole 440 so as to correspond to two stage hole portions.

The shape of the blanking convex die 1200 determines the shape of the substrate semi-finished product, and as shown in fig. 14, a convex die concave part is formed on the side wall of the blanking convex die 1200, corresponding to the substrate concave part, refer to fig. 21. The cross section of the substrate semi-finished product is rectangular, and the cross section of the blanking male die 1200 is also rectangular.

Second embodiment

The folding and riveting die of the embodiment corresponds to punching sheet processing of a semi-finished gear body, referring to fig. 22, two gear body convex parts 121 are arranged on the side surface of the semi-finished gear body, and a gear body folding and riveting point 122 is arranged at the end part of the semi-finished gear body.

As shown in fig. 1 to 4 and 11 to 13, the stack riveting die for motor stator punching sheets includes a female die insert 400 and a male die assembly, the female die insert 400 is provided with a positioning hole blanking slot 410, a stack riveting forming slot 430, a step positioning hole 420, a blanking hole 450 and a separating hole 440, and the male die assembly includes a positioning hole male die 800, a stack riveting male die 1000, a positioning hole guide pin 900, a blanking male die 1200 and a separating male die 1100.

The number of the overlapped riveting molds 430 is one, referring to fig. 11, an overlapped riveting boss 1010 is arranged on the overlapped riveting male mold 1000, and the overlapped riveting boss 1010 is matched with the overlapped riveting mold groove 430 to form a substrate overlapped riveting point 112 at the end of the substrate semi-finished product, referring to fig. 22.

With reference to fig. 5, the number of the stage holes 440 is one, and with reference to fig. 12, a stage boss 1120 is disposed on the stage punch 1100, and the stage boss 1120 is matched with the stage hole 440 to correspond to a stage hole portion.

The shape of the blanking male die 1200 determines the shape of the gear body semi-finished product, and a male die convex part is formed on the side wall of the blanking male die 1200, corresponding to the gear body convex part 121, as shown in fig. 22. The cross section of the semi-finished gear body is square, and the cross section of the blanking male die 1200 is also square.

Referring to fig. 14 to 19, the tooth body semi-finished product and the substrate semi-finished product have the same punching sheet forming method, and the substrate semi-finished product punching sheet is taken as an example to describe the punching sheet forming method, the bottom plate 100, the die 300, the die insert 400 and the like are classified as an assembly a, the die shank 1600, the fixing plate 700, the pressure plate 1400 and the like are classified as an assembly B, wherein the assembly a is fixed, and the assembly B can move up and down along with a punching machine, and the method includes the following steps:

the strip 1700 is constrained by the striker pin 500 to pass over the die insert 400 and step by step at a distance.

The punching machine drives the component B to move downwards, so that the pressing plate 1400 presses against the material strip 1700 against the elastic force of the spring 1500 to prevent the material strip 1700 from slipping, and simultaneously, a positioning hole 1710, a riveting point 1720, a punching hole 1730 and waste materials 1740 are formed on the material strip 1700. Specifically, through locating hole terrace die 800 with locating hole blanking groove 410 cooperates, so that form material area locating hole 1710 on the material area 1700, afterwards the B subassembly rebound, wherein fixed plate 700 drives press flitch 1400 to shift up, in order to relieve press flitch 1400 is right the effect of compressing tightly of material area 1700, so that material area 1700 can step by step once more, until locating hole 1710 on the material area 1700 with step-by-step locating hole 130a is relative, at this moment subassembly B moves down again, so that form the follow-up locating hole 1710 that is used for the location on the material area 1700, and locating hole uide pin 900 passes through locating hole 1710 inserts in stride locating hole 420, utilize simultaneously fold rivet terrace die 1000 with fold rivet shaping groove 430 cooperation, so that form material area 1700 on and fold rivet point 1720, through locating hole uide pin 900 step locating hole 420 and the locating hole cooperation on the material area, promote the shaping precision of folding rivet point 1720. Then, when the tape 1700 continues to step until the rivet overlapping point 1720 is matched with the blanking hole 450, the component B moves downwards again, so that the blanking male die 1200 penetrates through the tape 1700 to form a punching sheet with rivet overlapping points, and at this time, the punching sheet hole 1730 and the waste 1740 are left in the tape 1700.

When the punched waste 1740 on the strip 1700 moves to be opposite to the waste knife 1300, the waste knife 1300 moves downwards to cut the waste, and the cut waste is removed along with the sliding plate 600.

The positioning hole male die 800, the positioning hole guide pin 900, the blanking male die 1200 and the waste material knife 1300 move downwards simultaneously, and the forming of the overlapped riveting point, the distribution holes and the like improves the feeding step precision under the matching of the positioning hole guide pin 900 and the step positioning hole 420, so that the forming position precision of the overlapped riveting point and the distribution hole part is ensured, and the yield of the punching sheet is effectively improved.

The operation of the stepped male die 1100 can simultaneously utilize the cooperation of the positioning hole guide pin 900 and the step pitch positioning hole 420, thereby ensuring the position accuracy of the stepped hole portion forming.

The above-mentioned embodiments are only for illustrating the technical idea and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement the present invention accordingly, and the scope of the present invention is not limited by the embodiments, i.e. all equivalent changes or modifications made according to the spirit of the present invention will still fall within the scope of the present invention.

Claims

1. The utility model provides a fold die of riveting of motor stator punching for forming the punching that has fold riveting point to material area processing, its characterized in that includes:

the male die assembly comprises a positioning hole male die, a riveting male die and a positioning hole guide pin, the positioning hole male die is matched with the positioning hole blanking groove so that a positioning hole is formed in a moving material belt, and the positioning hole guide pin penetrates through the formed positioning hole and is matched with the step pitch positioning hole so that when the material belt is matched with the riveting male die and the riveting forming groove to form a riveting point, the position precision of the riveting point is improved;

the male die assembly further comprises a blanking male die, a blanking hole matched with the blanking male die is formed in the female die insert, and the blanking hole is located on one side, away from the positioning hole blanking groove, of the stacking and riveting forming groove;

the male die assembly further comprises a platform-separating male die, a platform-separating hole matched with the platform-separating male die is formed in the female die insert, and the platform-separating hole is formed between the stack riveting forming groove and the blanking hole.

2. The stack riveting die for motor stator punching sheets according to claim 1, further comprising a guide post, wherein the guide post is arranged perpendicular to the die insert, and the male die assembly is slidably connected to the guide post.

3. The stack riveting die for motor stator punching sheet according to claim 2, further comprising a fixing plate and a female die, wherein the female die insert is mounted on the female die, the female die is sleeved on the guide pillar, the positioning hole male die, the stack riveting male die, the positioning hole guide pin and the blanking male die are fixed on the fixing plate, and the fixing plate is sleeved on the guide pillar.

4. The rivet laminating die for motor stator punching sheets according to claim 3, further comprising a pressing plate, wherein the pressing plate is sleeved on the guide post and is located between the fixing plate and the female die so as to press the material strap.

5. The stack riveting die for motor stator punching sheets according to claim 4, wherein a second fastening piece is mounted on the pressing plate and is in sliding connection with the fixing plate, a spring is sleeved on the second fastening piece, and the spring is located between the fixing plate and the pressing plate.

6. The laminating and riveting die for the motor stator punching sheet according to claim 3, wherein at least two material blocking pins are arranged on the female die and are respectively clamped on two sides of the material belt.

7. The stack riveting die for motor stator punching sheets according to claim 3, further comprising a waste cutter, wherein the waste cutter is fixed on the fixing plate and is positioned on one side of the blanking male die, which is far away from the stack riveting male die.

8. The stack riveting die for motor stator punching sheets according to claim 4, further comprising a die shank, wherein the die shank is fixed to one side, away from the pressure plate, of the fixing plate, and a third through hole of a separating terrace die, through which the separating terrace die penetrates, is formed in the die shank.