A punching process using a multi-slot combined open indexing punching die of motor punching sheet

Abstract

The present application relates to a kind of punching process of open type indexing punching die of multi-slot shape combination using motor punching sheet, belong to motor punching sheet processing field, solve the technical problems that the existing punching sheet punching die exists low efficiency, slot type arrangement combination is limited, and punching die includes upper die holder, upper backing plate, male die fixed plate, male die, adjusting device, female die fixed plate, lower backing plate and lower die holder.The top of upper backing plate or the bottom of upper die holder is provided with several bending sliding grooves, several vertical through mounting holes are provided in upper backing plate, and mounting hole is vertically aligned with bending sliding groove one by one;Several coaxial uniform distribution through holes are provided in male die fixed plate;Male die includes several different shapes of punch, and the upper section of several punches is slidably installed in through hole one by one;Adjusting device has several groups;Adjusting device includes driver, bending transmission assembly and pad;It can punch simultaneously several slot types, and the punching effect is good, reduces the rejection rate, and is efficient.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of motor punching sheet processing, and particularly relates to a punching process of a multi-slot combined open indexing punching die for motor punching sheets. BACKGROUND

[0002] The punching sheets of medium and large-sized motors, and the punching of punching sheets of stators and rotors with various slot arrangements, generally adopt a single-slot punching process to achieve punching, i.e., the positioning of the axial hole and key groove of a punched ring, the use of a single-slot die for stators and rotors, the punching of one slot at a time, the continuous rotation of the punched ring by a high-speed single-slot punching device to obtain the punching sheets of stators and rotors, which is relatively low in efficiency, limited in slot arrangement and verification of slot patterns. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art, and provides a punching process of a multi-slot combined open indexing punching die for motor punching sheets, which solves the technical problems of low efficiency and limited slot arrangement in the punching of multi-slot punching sheets.

[0004] To solve the above problems, the technical scheme of the present application is as follows: a multi-slot combined open indexing punching die for motor punching sheets, comprising:

[0005] an upper die seat;

[0006] an upper cushion plate, the upper end of which is fixedly connected to the lower end of the upper die seat; a plurality of bending sliding grooves are formed in the top of the upper cushion plate or the bottom of the upper die seat, and a plurality of vertically penetrating mounting holes are formed in the upper cushion plate, which are vertically aligned with the bending sliding grooves one by one;

[0007] a male die fixed plate, the upper end of which is fixedly connected to the lower end of the upper cushion plate; a plurality of coaxial and uniformly distributed through holes are formed in the male die fixed plate;

[0008] a male die, comprising a plurality of punching heads of different shapes, each of which has a plurality of upper segments, the upper segments of the plurality of punching heads being slidably installed in the through holes one by one, and the lower segments of the punching heads penetrating downward through the male die fixed plate; a limiting clamping plate corresponding to each punching head is fixedly arranged at the lower part of the male die fixed plate to limit the upper segments of the punching heads in the through holes;

[0009] The adjusting device has a plurality of groups; the adjusting device comprises a driver, a bending transmission assembly and a cushion block, and the bending transmission assembly is correspondingly and movably installed in a bending sliding groove; the bending transmission assembly comprises a first profiled draw plate, a second profiled draw plate and a gear, one end of the first profiled draw plate is fixedly provided with a first rack, and one end of the second profiled draw plate is fixedly provided with a second rack; the gear is rotationally arranged in the middle of the bending sliding groove, the first profiled draw plate and the second profiled draw plate are slidably arranged on the two sides of the gear respectively, and the first rack and the second rack are in meshing connection with the gear; the driver is connected with the first profiled draw plate to drive the first profiled draw plate to reciprocatingly slide; the cushion block is correspondingly and vertically slidably installed in the mounting hole of the upper cushion plate, the cushion block is in vertical alignment with the punch, the lower end of the second profiled draw plate is provided with a recessed groove for the upper part of the cushion block to be embedded, when the cushion block is vertically aligned with the recessed groove, the punch aligned with the cushion block is in an inoperative state, and when the cushion block is vertically offset from the recessed groove, the punch aligned with the cushion block is in an operative state.

[0010] The concave die fixing plate is horizontally located below the convex die fixing plate, and the concave die fixing plate is provided with a recess for the lower segment of the punch to pass through;

[0011] The lower cushion plate is horizontally located below the concave die fixing plate, and the lower cushion plate is fixedly connected with the concave die fixing plate;

[0012] The lower die seat is located below the lower cushion plate, and the lower die seat is fixedly connected with the lower cushion plate, and the lower die seat is rotationally connected with the upper die seat through the vertical rotation assembly.

[0013] Preferably, the convex die comprises a first flat-bottom square groove punch, a second flat-bottom square groove punch, a round-bottom tapered groove punch and a shearing punch, and the shearing punch is used for shearing out a stator inner hole.

[0014] Preferably, the first flat-bottom square groove punch, the second flat-bottom square groove punch and the round-bottom tapered groove punch are all five in number, the five first flat-bottom square groove punches are circumferentially and continuously arranged on the convex die fixing plate, the five second flat-bottom square groove punches are continuously arranged on the convex die fixing plate, and the five round-bottom tapered groove punches are continuously arranged on the convex die fixing plate.

[0015] The five first flat-bottom square groove punches are respectively A-1 to A-5 punches, the adjusting devices corresponding to the five first flat-bottom square groove punches are respectively a-1 to a-5 adjusting devices; the five round-bottom tapered groove punches are respectively B-1 to B-5 punches, the adjusting devices corresponding to the five round-bottom tapered groove punches are respectively b-1 to b-5 adjusting devices, and the five second flat-bottom square groove punches are respectively C-1 to C-5 punches, and the adjusting devices corresponding to the five second flat-bottom square groove punches are respectively c-1 to c-5 adjusting devices.

[0016] Preferably, the first rack and the second rack are in meshing connection with the same side of the gear.

[0017] Preferably, the unloading plate is elastically connected to the upper die holder by an elastic assembly.

[0018] Another object of the present application is to provide a punching process of motor punching sheet, which adopts the above-mentioned motor punching sheet multi-slot combined open indexing punching die, and the punching process steps are as follows:

[0019] According to the number of stator or rotor slots, the ring sheet is divided into N equal parts, the ring sheet is positioned by the ring sheet shaft hole and key groove, the punches needed to be used on the die are adjusted to working state, and the other punches are adjusted to non-working state, the ring sheet is rotated by the die, and the ring sheet is punched by N times of continuous rotation.

[0020] Preferably, when the number of stator punching sheet or rotor punching sheet slots is 60 slots, and the slot shape is 3 kinds, the whole punching sheet slot shape 5 slots are taken as a group, divided into 12 equal parts, the die drives the ring sheet to rotate 12 times to punch, and 5 slots are punched every time, and the stator inner hole is sheared by 1 / 12, and the die drives the ring sheet to continuously rotate to complete the punching of all slot shapes and the shearing of the stator inner hole.

[0021] The combined punching process of the slot type CBABC is realized as follows: the A-3 punch is adjusted to working state through the a-3 adjusting device; the B-2 and B-4 punches are adjusted to working state through the b-2 and b-4 adjusting devices respectively; the C-1 and C-5 punches are adjusted to working state through the c-1 and c-5 adjusting devices respectively; and the remaining 10 punches are adjusted to non-working state; the die is installed on the open indexing punch press, the die gap is adjusted, the positioning is performed by the shaft hole, the punching number of the punching sheet rotating one circle on the punch press is set to 12, and the three different slot punching sheet is obtained.

[0022] Preferably, when the number of stator punching sheet or rotor punching sheet slots is 60 slots, and the slot shape is 2 kinds, the whole punching sheet slot shape 5 slots are taken as a group, divided into 12 equal parts, the die drives the ring sheet to rotate 12 times to punch, and 5 slots are punched every time, and the stator inner hole is sheared by 1 / 12, and the die drives the ring sheet to continuously rotate to complete the punching of all slot shapes and the shearing of the stator inner hole.

[0023] The combined punching process of the slot type ABABA is realized as follows: the A-1, A-3 and A-5 punches are adjusted to working state through the a-1, a-3 and a-5 adjusting devices, and the B-2 and B-4 punches are adjusted to working state through the b-2 and b-4 adjusting devices; the remaining 10 punches are adjusted to non-working state; the die is installed on the open indexing punch press, the die gap is adjusted, the positioning is performed by the shaft hole, the punching number of the punching sheet rotating one circle on the punch press is set to 12, and the double different slot punching sheet is obtained.

[0024] Preferably, when the number of slots of the stator or rotor punching sheet is 60 slots, the slot shape is 1 type, the whole punching sheet slot shape 5 slots is taken as a group, divided into 12 equal parts, the mold drives the ring piece to rotate 12 times to punch, and 5 slots are punched every time, while the stator inner hole is cut 1 / 12, and the mold drives the ring piece to rotate continuously to complete the punching of all slot shapes and the cutting of the stator inner hole;

[0025] The slot type B punching process is realized: the B-1, B-2, B-3, B-4 and B-5 punches are adjusted to the working state through the b-1, b-2, b-3, b-4 and b-5 adjusting devices; the remaining 10 punches are all adjusted to the non-working state; the mold is installed on the open indexing punch press, the mold gap is adjusted, the shaft hole is positioned, the number of punches per rotation of the punching sheet on the punch press is set to 12, and a single slot punching sheet is obtained.

[0026] Compared with the prior art, the beneficial effects of the present application are:

[0027] The present application adopts a set of indexing punch composite mold, which can manufacture single slot punching sheets and multi-slot type combined punching sheets. Compared with the current stator size single slot punching scheme, the present application avoids the punching sheet scrapping caused by the small waste material jumping problem during the connection punching. At the same time, various slot types are independent of each other, and the special-shaped slot three or more slot type combined punching can be realized. Compared with the current single slot punching process, the production efficiency is greatly improved, the cost performance is high, and the present application can better help the enterprise research and development needs. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the arrangement of three special-shaped slots on the punching sheet in the embodiment;

[0029] Figure 2 It is a structural schematic diagram of the punching mold in the embodiment;

[0030] Figure 3 It is a structural schematic diagram of the punch and the punch fixing plate in the embodiment;

[0031] Figure 4 It is a first slot type diagram when the slot type CBABC is punched in the embodiment;

[0032] Figure 5 It is a last slot type diagram when the slot type CBABC is punched in the embodiment;

[0033] Figure 6 It is a first slot type diagram when the slot type ABABA is punched in the embodiment;

[0034] Figure 7 It is a last slot type diagram when the slot type ABABA is punched in the embodiment;

[0035] Figure 8 It is a first slot type diagram when the slot type B is punched in the embodiment;

[0036] Figure 9 This is a diagram of the final groove shape during the stamping of groove shape B in the embodiment;

[0037] Figure 10 This is a schematic diagram of the adjusting device in the embodiment.

[0038] Reference numerals: 10. Upper die base; 11. Bending groove; 20. Lower die base; 30. Upper backing plate; 31. Mounting hole; 40. Punch fixing plate; 41. Through hole; 50. Stripper plate; 51. Elastic component; 60. Die fixing plate; 70. Lower backing plate; 80. Punch; 90. Limiting plate; 100. First flat-bottomed square groove punch; 110. Round-bottomed tapered groove punch; 120. Second flat-bottomed square groove punch; 130. Shearing punch; 140. Guide sleeve; 150. Guide post; 160. Pad block; 170. Adjustment device; 171. First irregular-shaped draw plate; 172. Second irregular-shaped draw plate; 1721. Recessed groove; 173. Gear; 174. Driver; 175. Fixed base; 176. First rack; 177. Second rack. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0040] Example 1: As Figures 1-10 As shown, this embodiment discloses a multi-groove combined open-type indexing stamping die for motor laminations, including an upper die base 10, an upper backing plate 30, a punch fixing plate 40, a punch 80, an adjusting device 170, a die fixing plate 60, a lower backing plate 70, and a lower die base 20. The upper backing plate 30 is horizontally located below the upper die base 10, with its top surface in contact with the bottom surface of the upper die base 10, and is fixedly connected to the upper die base 10. Several bent sliding grooves 11 are formed on the top of the upper backing plate 30 or the bottom of the upper die base 10, and several vertically penetrating mounting holes 31 are formed on the upper backing plate 30, with the mounting holes 31 aligned vertically with the bent sliding grooves 11. The punch fixing plate 40 is horizontally located below the upper backing plate 30, with its top surface in contact with the bottom surface of the upper backing plate 30, and is fixedly connected to the punch. Plate 40 is fixedly connected to upper pad 30; several coaxially distributed through holes 41 are opened on punch fixing plate 40; punch 80 includes several punches of different shapes, each punch has several, the upper sections of several punches are slidably installed in the through holes 41 one by one, and the lower sections of the punches extend downward through punch fixing plate 40; the lower part of punch fixing plate 40 is fixedly provided with limiting plates 90 corresponding to the punches to slide and limit the upper sections of the punches in the through holes 41. Specifically, a limiting groove is opened in the middle of the side wall of the punch for the limiting plates 90 to move and engage.

[0041] The adjusting device 170 has several groups; the adjusting device 170 comprises a driver 174, a bending transmission assembly and the cushion block 160, the bending transmission assembly is correspondingly movably mounted in the bending sliding groove 11; the bending transmission assembly comprises a first profiled draw plate 171, a second profiled draw plate 172 and a gear 173, one end of the first profiled draw plate 171 is fixedly provided with a first rack 176, one end of the second profiled draw plate 172 is fixedly provided with a second rack 177; the gear 173 is rotatably arranged in the middle of the bending sliding groove 11, the first profiled draw plate 171 and the second profiled draw plate 172 are slidably arranged on the two sides of the gear 173 respectively, the first rack 176 and the second rack 177 are all in meshing connection with the gear 173; the driver 174 is connected with the first profiled draw plate 171 to drive the first profiled draw plate 171 to reciprocally slide; the cushion block 160 is correspondingly vertically slidably mounted in the mounting hole 31 of the upper cushion plate 30, the cushion block 160 is vertically aligned with the punch, a recessed groove 1721 is arranged at the lower end of the second profiled draw plate 172 for the upper part of the cushion block 160 to be embedded; when the cushion block 160 is vertically aligned with the recessed groove 1721, the punch aligned with the cushion block 160 is in an inoperative state, when the cushion block 160 is vertically offset from the recessed groove 1721, the punch aligned with the cushion block 160 is in an operative state; the die holder 60 is horizontally arranged below the punch holder 40, the die holder 60 is provided with a notch for the lower segment of the punch to pass through; the lower cushion plate 70 is horizontally arranged below the die holder 60, the lower cushion plate 70 is fixedly connected with the die holder 60; the lower die seat 20 is arranged below the lower cushion plate 70, the lower die seat 20 is fixedly connected with the lower cushion plate 70, and the lower die seat 20 is rotatably connected with the upper die seat 10 through the vertical rotating assembly.

[0042] Through the above arrangement, a plurality of punches are arranged on the die, and the adjusting device 170 for switching the working state of the punch is correspondingly arranged, so that a plurality of groove types can be punched at the same time, each punch corresponds to punch one groove type, the punching effect is good, the waste rate is reduced, and the efficiency is high. The first profiled draw plate 171, the second profiled draw plate 172 and the gear 173 are arranged in the bending sliding groove 11, the structure is arranged compactly, more punches and adjusting devices 170 can be conveniently arranged, the adjusting device 170 can adapt to the bending angles of the bending sliding grooves 11, and the universality is good.

[0043] The driver 174 adopts a cylinder or an adjusting screw, when the driver 174 is the adjusting screw, a fixed seat 175 is fixedly arranged on the upper die seat 10, the adjusting screw is threadedly connected with the first special-shaped draw plate 171 after penetrating through the fixed seat 175, the first special-shaped draw plate 171 is driven to slide in the bending sliding groove 11 by rotating the adjusting screw, the gear 173 is driven to rotate, the second special-shaped draw plate 172 is driven to slide in the bending sliding groove 11 by the rotation of the gear 173, the alignment and misalignment of the corresponding recess groove 1721 and the cushion block 160 are realized, and the switching of the working state of the corresponding punch is realized. The vertical rotating assembly includes a vertical guide column 150 and a guide sleeve 140, the guide column 150 is fixedly connected with the lower die seat 20, and the guide sleeve 140 is fixedly connected with the upper die seat 10. The guide column 150 is rotatably arranged in the guide sleeve 140.

[0044] Figure 10 The adjusting device 170 of the mold in the embodiment is shown in the schematic view, the sliding of the first special-shaped draw plate 171 and the second special-shaped draw plate 172 is driven by the tightness of the adjusting screw, the switching of the working state of the corresponding punch is realized by the cooperation of the recess groove 1721 formed in the second special-shaped draw plate 172 and the cushion block 160.

[0045] In the multi-groove combined open indexing stamping die for motor punching sheets in the embodiment, the male die 80 includes the first flat-bottom square groove punch 100, the second flat-bottom square groove punch 120, the round-bottom tapered groove punch 110 and the shearing punch 130 which are coaxially and circumferentially arranged on the male die fixing plate 40. In this way, one to three kinds of punches can be stamped at the same time.

[0046] In the multi-groove combined open indexing stamping die for motor punching sheets in the embodiment, the first flat-bottom square groove punch 100, the second flat-bottom square groove punch 120 and the round-bottom tapered groove punch 110 are all five in number, the five first flat-bottom square groove punches 100 are coaxially and circumferentially continuously arranged on the male die fixing plate 40, the five second flat-bottom square groove punches 120 are coaxially and circumferentially continuously arranged on the male die fixing plate 40, and the five round-bottom tapered groove punches 110 are coaxially and circumferentially continuously arranged on the male die fixing plate 40. Figure 3 As shown in the figure, the five first flat-bottom square groove punches 100 are respectively A-1 to A-5 punches, the adjusting devices 170 corresponding to the five first flat-bottom square groove punches 100 are respectively a-1 to a-5 adjusting devices 170; the five round-bottom tapered groove punches 110 are respectively B-1 to B-5 punches, the adjusting devices 170 corresponding to the five round-bottom tapered groove punches 110 are respectively b-1 to b-5 adjusting devices 170, and the five second flat-bottom square groove punches 120 are respectively C-1 to C-5 punches, the adjusting devices 170 corresponding to the five second flat-bottom square groove punches 120 are respectively c-1 to c-5 adjusting devices 170.

[0047] In a multi-slot combined open indexing stamping die for motor laminations according to this embodiment, both the first rack 176 and the second rack 177 are meshed with the gear 173 on the same side. For example... Figure 10 The diagram shows the connection structure of two irregularly shaped draw plates. The racks of the two irregularly shaped draw plates intersect at an angle, one above the other. When the adjusting screw is pushed inward, it drives the rack of gear 173 to rotate, pushing the irregularly shaped draw plate to slide along the bent slide groove 11. At this time, the recessed groove 1721 under the second irregularly shaped draw plate 172 is displaced, so that the recessed groove 1721 is aligned vertically or staggered with the corresponding pad 160, thereby controlling the working state of the punch.

[0048] In this embodiment, a multi-slot combined open indexing stamping die for motor laminations also includes a stripper plate 50, which is elastically connected to the upper die base 10 via an elastic component 51. The installation structure and working principle of the stripper plate 50 are existing technologies and will not be described in detail here.

[0049] like Figure 1 As shown, taking the H315 stator three-slot lamination as an example: the stator has three slot shapes arranged in a regular pattern, namely slot A, slot B, and slot C, with five slots per group, allowing for different arrangements and combinations, for a total of 60 slots. Among them, slots A and C are flat-bottomed square slots, and slot B is a round-bottomed conical slot. To achieve laminations with various slot arrangements, 15 (3*5) re-stamping dies are required, which is extremely costly and unsuitable for meeting non-standard customization needs in the market; furthermore, existing re-stamping for conventional industrial motor laminations generally only reaches the center height H355, which cannot meet the needs of low-voltage high-power H400 / 450 and large-pole multi-slot laminations. To improve efficiency and reduce die costs, this embodiment adopts a multi-slot combination open indexing stamping die for motor laminations.

[0050] Example 2: Figures 1-10 As shown, this embodiment provides a stamping process for motor laminations, using a multi-slot combined open indexing stamping die for motor laminations as described in Embodiment 1. The stamping process steps are as follows:

[0051] Divide the stator or rotor into N equal parts according to the number of slots. Position the ring piece by the ring piece shaft hole and keyway. Adjust the punches that need to be used on the mold to the working state, and adjust the other punches to the non-working state. The mold drives the ring piece to rotate and punch the ring piece in N consecutive rotations.

[0052] When the stator or rotor laminations have 60 slots and three different slot shapes, the lamination is divided into 12 equal parts, with 5 slots per group. The die drives the ring lamination to rotate 12 times to complete the stamping. Each stroke completes the stamping of 5 slots, while simultaneously shearing 1 / 12 of the stator inner hole. The die drives the ring lamination to rotate continuously to complete the stamping of all slot shapes and the shearing of the stator inner hole. The structure of the open-type indexing stamping die is as follows: Figure 2 , Figure 3is shown; the implementation groove type CBABC combination stamping process is: the A-3 punch is adjusted to working state through a-3 adjusting device; the B-2 and B-4 punches are adjusted to working state through b-2 and b-4 adjusting devices respectively; the C-1 and C-5 punches are adjusted to working state through c-1 and c-5 adjusting devices respectively; the remaining 10 punches are all adjusted to non-working state; the mold is installed on the open indexing punch press, the mold gap is adjusted, the shaft hole is positioned, the number of stamping per revolution of the punch sheet on the punch press is set to 12, and the three different groove stamping sheet as shown in Figure 4 and Figure 5 is obtained.

[0053] When the number of slots of the stator sheet or the rotor sheet is 60 slots and the slot shape is 2 types, 5 slots of the whole sheet slot shape are taken as a group and divided into 12 equal parts, the mold drives the ring sheet to rotate 12 times to be stamped, 5 slots are completed per stamping, and 1 / 12 of the stator inner hole is sheared at the same time, and the whole slot shape stamping and the shearing of the stator inner hole are completed through the continuous rotation of the mold driven ring sheet; the implementation groove type ABABA combination stamping process is: the A-1, A-3, A-5 punches are adjusted to working state through a-1, a-3, a-5 adjusting devices, the B-2 and B-4 punches are adjusted to working state through b-2 and b-4 adjusting devices; the remaining 10 punches are all adjusted to non-working state; the mold is installed on the open indexing punch press, the mold gap is adjusted, the shaft hole is positioned, the number of stamping per revolution of the punch sheet on the punch press is set to 12, and the double different groove stamping sheet as shown in Figure 6 and Figure 7 is obtained.

[0054] When the number of slots of the stator sheet or the rotor sheet is 60 slots and the slot shape is 1 type, 5 slots of the whole sheet slot shape are taken as a group and divided into 12 equal parts, the mold drives the ring sheet to rotate 12 times to be stamped, 5 slots are completed per stamping, and 1 / 12 of the stator inner hole is sheared at the same time, and the whole slot shape stamping and the shearing of the stator inner hole are completed through the continuous rotation of the mold driven ring sheet; the implementation groove type B stamping process is: the B-1, B-2, B-3, B-4, B-5 punches are adjusted to working state through b-1, b-2, b-3, b-4, b-5 adjusting devices; the remaining 10 punches are all adjusted to non-working state; the mold is installed on the open indexing punch press, the mold gap is adjusted, the shaft hole is positioned, the number of stamping per revolution of the punch sheet on the punch press is set to 12, and the single slot shape stamping sheet as shown in Figure 8 and Figure 9 is obtained.

[0055] The motor sheet stamping process of the embodiment can stamp multiple slot types independently at the same time, can select to stamp one slot type or multiple slot types at the same time, is suitable for the arrangement and combination of multiple different slot types, has better universality, and has high efficiency.

Claims

1. A stamping process using a multi-slot combined open-type indexing stamping die with motor laminations, characterized in that, The mold includes: Upper mold base (10); The upper pad (30) is fixedly connected to the lower end of the upper mold base (10) at its upper end; several bent grooves (11) are opened on the top of the upper pad (30) or the bottom of the upper mold base (10); several vertical through mounting holes (31) are opened on the upper pad (30); the mounting holes (31) and the bent grooves (11) are aligned vertically. A punch fixing plate (40) is provided, the upper end of which is fixedly connected to the lower end of the upper pad plate (30); a number of coaxially distributed through holes (41) are provided on the punch fixing plate (40). The punch (80) includes several punches of different shapes, each punch having several pieces. The upper sections of the punches are slidably installed in the through hole (41) in a corresponding manner, and the lower sections of the punches extend downward through the punch fixing plate (40). The lower part of the punch fixing plate (40) is fixedly provided with limiting plates (90) corresponding to the punches to slide and limit the upper sections of the punches in the through hole (41). The adjusting device (170) has several sets; the adjusting device (170) includes a driver (174), a bending transmission assembly and a pad (160), and the bending transmission assembly is movably installed in the bending slide (11) one by one; the bending transmission assembly includes a first shaped draw plate (171), a second shaped draw plate (172) and a gear (173), one end of the first shaped draw plate (171) is fixedly provided with a first rack (176), and one end of the second shaped draw plate (172) is fixedly provided with a second rack (177); the gear (173) is rotatably provided in the middle of the bending slide (11), and the first shaped draw plate (171) and the second shaped draw plate (172) are respectively slidably provided on both sides of the gear (173), and the first rack (176) and the second rack (173) are rotatably provided in the middle of the bending slide (11). All strips (177) are meshed with gears (173); the driver (174) is connected to the first shaped draw plate (171) to drive the first shaped draw plate (171) to slide back and forth; the pads (160) are vertically slidably installed in the mounting holes (31) of the upper pad plate (30), and the pads (160) and the punches are vertically aligned and in contact; the lower end of the second shaped draw plate (172) is provided with a recessed groove (1721) for the upper part of the pads (160) to fit into; when the pads (160) and the recessed groove (1721) are vertically aligned, the punch aligned with the pads (160) is in a non-working state; when the pads (160) and the recessed groove (1721) are vertically misaligned, the punch aligned with the pads (160) is in a working state. The die fixing plate (60) is horizontally located below the punch fixing plate (40), and the die fixing plate (60) has a notch for the lower section of the punch to pass through. The lower pad (70) is horizontally located below the die fixing plate (60), and the lower pad (70) is fixedly connected to the die fixing plate (60); The lower mold base (20) is located below the lower pad (70). The lower mold base (20) is fixedly connected to the lower pad (70), and the lower mold base (20) is rotatably connected to the upper mold base (10) through a vertical rotating assembly. The punch (80) includes a first flat-bottom square slot punch (100), a second flat-bottom square slot punch (120), a round-bottom conical slot punch (110), and a shearing punch (130), which is used to shear out the stator inner hole; Several sets of adjustment devices (170) are connected one-to-one with several punches; The stamping process steps are as follows: Divide the stator or rotor into N equal parts according to the number of slots. Position the ring piece by the ring piece shaft hole and keyway. Adjust the punches that need to be used on the mold to the working state, and adjust the other punches to the non-working state. The mold drives the ring piece to rotate and punch the ring piece in N consecutive rotations.

2. The stamping process of a multi-slot combined open indexing stamping die using motor laminations according to claim 1, characterized in that, There are five of each of the first flat-bottom square slot punch (100), the second flat-bottom square slot punch (120), and the round-bottom tapered slot punch (110). The five first flat-bottom square slot punches (100) are arranged continuously in the circumferential direction on the punch fixing plate (40), the five second flat-bottom square slot punches (120) are arranged continuously on the punch fixing plate (40), and the five round-bottom tapered slot punches (110) are arranged continuously on the punch fixing plate (40). The five first flat-bottomed square groove punches (100) are punches A-1 to A-5 respectively, and the adjustment devices (170) connected to the five first flat-bottomed square groove punches (100) are adjustment devices a-1 to a-5 respectively; The five round-bottomed conical groove punches (110) are punches B-1 to B-5 respectively, and the adjustment devices (170) connected to the five round-bottomed conical groove punches (110) are adjustment devices b-1 to b-5 respectively. The five second flat-bottomed square groove punches (120) are punches C-1 to C-5 respectively, and the adjustment devices (170) connected to the five second flat-bottomed square groove punches (120) are adjustment devices c-1 to c-5 respectively.

3. The stamping process of a multi-slot combined open indexing stamping die using motor laminations according to claim 1, characterized in that, The first rack (176) and the second rack (177) are both meshed with the gear (173) on the same side.

4. The stamping process of a multi-slot combined open-type indexing stamping die using motor laminations according to claim 1, characterized in that, It also includes a stripper plate (50), which is elastically connected to the upper mold base (10) via an elastic component (51).

5. The stamping process of a multi-slot combined open indexing stamping die using motor laminations according to claim 1, characterized in that, When the number of slots in the stator lamination or rotor lamination is 60 and there are 3 types of slots, the whole lamination is divided into 12 equal parts with 5 slots in a group. The die drives the ring lamination to rotate 12 times to punch the lamination. Each punch completes the punching of 5 slots. At the same time, the stator inner hole is sheared by 1 / 12. The die drives the ring lamination to rotate continuously to complete the punching of all slots and the shearing of the stator inner hole. The process of punching the CBABC combination of slotted punches is as follows: A-3 punch is adjusted to the working state via the a-3 adjustment device; B-2 and B-4 punches are adjusted to the working state via the b-2 and b-4 adjustment devices respectively; C-1 and C-5 punches are adjusted to the working state via the c-1 and c-5 adjustment devices respectively; the remaining 10 punches are adjusted to the non-working state; the die is installed on the open indexing punch press, the die clearance is adjusted, the shaft hole is used for positioning, and the number of punches per revolution of the punch press is set to 12 to obtain the three-slotted punch.

6. The stamping process of a multi-slot combined open indexing stamping die using motor laminations according to claim 1, characterized in that, When the number of slots in the stator lamination or rotor lamination is 60 and there are 2 types of slot shapes, the whole lamination is divided into 12 equal parts with 5 slots in a group. The die drives the ring lamination to rotate 12 times to punch the lamination. Each punch completes the punching of 5 slots. At the same time, the stator inner hole is sheared by 1 / 12. The die drives the ring lamination to rotate continuously to complete the punching of all slot shapes and the shearing of the stator inner hole. To achieve the ABABA combination stamping process for slotted punches: A-1, A-3, and A-5 punches are adjusted to the working state using the a-1, a-3, and a-5 adjustment devices, and B-2 and B-4 punches are adjusted to the working state using the b-2 and b-4 adjustment devices; the remaining 10 punches are adjusted to the non-working state; the die is installed on an open indexing press, the die clearance is adjusted, and the die is positioned by the shaft hole. The number of punches per revolution of the punch on the press is set to 12, resulting in a double-slotted punch.

7. The stamping process of a multi-slot combined open indexing stamping die using motor laminations according to claim 1, characterized in that, When the number of slots in the stator lamination or rotor lamination is 60 and the slot shape is one type, the whole lamination is divided into 12 equal parts with 5 slots as a group. The die drives the ring lamination to rotate 12 times to punch the slots. Each punch completes the punching of 5 slots. At the same time, the stator inner hole is sheared by 1 / 12. The die drives the ring lamination to rotate continuously to complete the punching of all slot shapes and the shearing of the stator inner hole. To achieve the process of punching a slotted B-shaped stamp: Adjust punches B-1, B-2, B-3, B-4, and B-5 to the working state using adjustment devices b-1, b-2, b-3, b-4, and b-5; adjust the remaining 10 punches to the non-working state; install the die on an open indexing press, adjust the die clearance, position it using the shaft hole, and set the number of punches per revolution of the stamping press to 12, thus obtaining a single slotted stamping.

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