Stamping method for stator and rotor punching sheets

Abstract

The invention relates to the technical field of stator and rotor punching sheets, in particular to a stator and rotor punching sheet stamping method which comprises a truss, a fixing plate and a lower die, the fixing plate and the lower die are fixedly mounted on the truss, guide columns which are symmetrically arranged are further fixed to the truss, and a supporting plate is fixed to the ends, away from the truss, of the guide columns; the guide assembly is arranged on the guide column, an elastic pressing mold mechanism is arranged on the guide assembly, and an upper mold matched with the lower mold is connected to the elastic pressing mold mechanism; the driving assembly is arranged on the supporting plate and is connected with the elastic mold pressing mechanism; the intermittent conveying mechanism is arranged on the truss and connected with the driving assembly, conveying rollers which are symmetrically arranged are connected to the intermittent conveying mechanism, and the driving assembly can drive the conveying rollers to intermittently rotate through the intermittent conveying mechanism; according to the device, the upper die and the guide assembly are matched to carry out integrated forming operation of notching and cutting on the steel plate.

Description

Technical Field

[0001] The invention relates to the technical field of stator and rotor punching sheets, in particular to a stator and rotor punching sheet punching method. Background Art

[0002] Stator and rotor punching sheets are a common core material in the motor industry. The material is silicon steel plate, which can be processed by punching, twinning and cutting to produce stator and rotor cores. Punching and cutting are the two most common processes in punching sheet processing.

[0003] The selection of lamination material is one of the key factors that determine the quality of the stator and rotor. The material usually used for lamination processing is silicon steel sheet. When selecting, the thickness and hardness of the selected material should be determined according to factors such as the power, frequency and number of coil turns of the motor.

[0004] In this regard, Chinese patent CN101222166B proposes a method for stamping motor stator and rotor sheets, including the following steps: a step of blanking stator and rotor sheets, punching a stator and rotor blank sheet on a sheet; a step of trimming and separating stator and rotor sheets, separating the stator and rotor sheets in the stator and rotor blank sheet with the positioning process hole as the reference; a step of processing rotor sheets, punching the rotor outer circle, groove shape, shaft hole and keyway with the positioning process hole in the rotor sheet as the reference. The motor rotor sheet stamping processing technology of the present invention, that is, utilizing the mechanical clearance of the slot punching machine and the variable slot punching speed function, changes the rotor sheet that traditionally requires two processes to be completed to be punched once on a pair of slot punching dies; better eliminates the slot shape error after the punching sheet is pressed; and can save the punching and operation hours, so that the manufacturing cost is reduced. However, in actual use, each notch needs to be punched in turn, resulting in low punching efficiency, and after the punching is completed, the stator and rotor may be displaced due to the separation of the punching die and the steel sheet, resulting in the problem of damage to the stator and rotor. Summary of the invention

[0005] The object of the present invention is to provide a method for punching stator and rotor sheets to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for punching stator and rotor sheets comprises the following steps: Step 1: Select the appropriate steel and place it on the punch press; Step 2: Pull the steel to the stamping equipment, and under the action of the stamping equipment, stamp the steel to form the outline of the stator and rotor; Step 3: After stamping, the stator and rotor are plastically formed so that the working surfaces of the stator and rotor form a certain curvature to adapt to subsequent installation; Step 4: Surface treatment of the stator and rotor is usually carried out by galvanizing, electroplating and other methods for anti-corrosion and anti-rust treatment. It can also be treated by spray painting or electrophoresis.

[0007] As a further solution of the present invention: the stamping equipment comprises: A truss, and a fixing plate and a lower mold fixedly mounted on the truss, wherein the truss is also fixed with symmetrically arranged guide columns, and a support plate is fixed at one end of the guide column away from the truss; Also includes: A guide assembly is arranged on the guide column, the guide assembly is provided with an elastic die pressing mechanism, and the elastic die pressing mechanism is connected with an upper die matching with the lower die; A driving assembly, arranged on the support plate and connected to the elastic die pressing mechanism, the driving assembly can drive the guide assembly to move along the length direction of the guide column, and adjust the matching state of the upper die and the lower die through the elastic die pressing mechanism; An intermittent conveying mechanism is arranged on the truss and connected to the driving assembly. The intermittent conveying mechanism is connected with symmetrically arranged conveying rollers. The driving assembly can drive the conveying rollers to rotate intermittently through the intermittent conveying mechanism.

[0008] As a further solution of the present invention: the guide assembly includes a guide sleeve slidably mounted on the guide column, a movable plate is fixed on the guide sleeve, and a cutting disc is fixed on one end of the movable plate facing the truss.

[0009] As a further solution of the present invention: the elastic die pressing mechanism includes fixed columns fixedly mounted on the movable plate and symmetrically arranged, a connecting plate is fixed to one end of the fixed column away from the movable plate, and an elastic component connected to the upper mold is arranged on the connecting plate.

[0010] As a further solution of the present invention: the elastic component includes a supporting sleeve fixedly mounted on the connecting plate and symmetrically arranged, a movable rod is slidably mounted in the supporting sleeve, the movable rod is fixedly connected to the upper mold, and a spring abutting against the movable rod is fixed in the supporting sleeve; It also includes a slot provided on the supporting sleeve, and a limiting block slidably connected to the slot is fixed on the movable rod.

[0011] As a further solution of the present invention: the driving assembly includes a motor fixedly mounted on the support plate, a crankshaft connected to the motor output shaft is rotatably mounted on the support plate, a hinged plate is rotatably mounted on the crankshaft, and a pull rod fixedly connected to the connecting plate is hinged on the hinged plate.

[0012] As a further solution of the present invention: the intermittent conveying mechanism includes a No. 3 rotating rod rotatably mounted on the fixed plate and symmetrically arranged, the No. 3 rotating rod is fixedly connected to the conveying roller, two gears meshing with each other are respectively fixed on the two No. 3 rotating rods, and a Maltese cross movement assembly connected to the No. 3 rotating rod is arranged on the support plate.

[0013] As a further solution of the present invention: the Maltese cross movement assembly includes a No. 1 rotating rod fixedly mounted on the crankshaft, a driving wheel is fixed on the No. 1 rotating rod, a No. 2 rotating rod is rotatably mounted on the support plate, a driven wheel cooperating with the driving wheel is fixed on the No. 2 rotating rod, and a belt connected to one of the No. 3 rotating rods is sleeved on the No. 2 rotating rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can perform stamping and forming on steel sheets by controlling the matching state of the upper mold and the lower mold, and after the stator and rotor are punched, control the movement of the steel sheets through the intermittent conveying mechanism to facilitate continuous punching of the stator and rotor. When punching is required, the driving component works to drive the elastic die pressing mechanism to move, and under the action of the guiding component, the upper mold moves toward the lower mold. When the upper mold and the lower mold are matched, the steel sheet is stamped and formed. At this time, under the action of the guiding component, the stator and rotor with completed punching are cut. After the cutting is completed, the driving component controls the upper mold to move in the direction away from the lower mold. At the same time, the driving component also drives the intermittent conveying mechanism to move, so as to control the steel sheet to move a certain distance through the conveying roller. The above steps are repeated to achieve the purpose of continuously punching the stator and rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the process flow of an embodiment of a method for stamping stator and rotor sheets.

[0016] Figure 2 The present invention is a schematic structural diagram of an embodiment of a method for punching stator and rotor sheets.

[0017] Figure 3 This is a structural schematic diagram of another angle in an embodiment of a method for punching stator and rotor sheets.

[0018] Figure 4 The figure is a schematic diagram of a half-section structure in one embodiment of a method for punching stator and rotor sheets.

[0019] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at point A in the middle.

[0020] Figure 6This is a schematic diagram of the connection relationship between part of the driving components and part of the intermittent conveying mechanism in one embodiment of the stator and rotor punching method.

[0021] Figure 7 The exploded structural diagram of part of the driving assembly and part of the intermittent conveying mechanism in one embodiment of the stator and rotor punching method is shown.

[0022] Figure 8 The figure is a schematic structural diagram of an elastic film pressing mechanism in one embodiment of a method for punching stator and rotor sheets.

[0023] Fig. 9 The figure is a schematic diagram of the exploded structure of a part of the elastic film pressing mechanism in one embodiment of the stator and rotor punching method.

[0024] In the figure: 1. truss; 2. lower mold; 3. guide column; 4. support plate; 5. motor; 6. crankshaft; 7. No. 1 rotating rod; 8. driving wheel; 9. No. 2 rotating rod; 10. driven wheel; 11. belt; 12. fixed plate; 13. No. 3 rotating rod; 14. conveying roller; 15. gear; 16. hinge plate; 17. pull rod; 18. connecting plate; 19. fixed column; 20. guide sleeve; 21. movable plate; 22. support sleeve; 23. slot; 24. movable rod; 25. limit block; 26. spring; 27. upper mold; 28. cutting disc. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 to Figure 9 In an embodiment of the present invention, a method for punching stator and rotor sheets includes the following steps: Step 1: Select the appropriate steel and place it on the punch press; Step 2: Pull the steel to the stamping equipment, and under the action of the stamping equipment, stamp the steel to form the outline of the stator and rotor; Step 3: After stamping, the stator and rotor are plastically formed so that the working surfaces of the stator and rotor form a certain curvature to adapt to subsequent installation; Step 4: Surface treatment of the stator and rotor is usually carried out by galvanizing, electroplating and other methods for anti-corrosion and anti-rust treatment. It can also be treated by spray painting or electrophoresis.

[0027] The stamping equipment comprises: A truss 1, and a fixing plate 12 and a lower mold 2 fixedly mounted on the truss 1. The truss 1 is also fixed with guide columns 3 symmetrically arranged, and a support plate 4 is fixed to one end of the guide column 3 away from the truss 1; Also includes: See also Figure 2-Figure 4 , a guide assembly is arranged on the guide column 3, and the guide assembly includes a guide sleeve 20 slidably mounted on the guide column 3, a movable plate 21 is fixed on the guide sleeve 20, and a cutting disk 28 is fixed on one end of the movable plate 21 facing the truss 1.

[0028] In detail, when punching the stator and rotor, it is necessary to control the upper mold 27 to cooperate with the lower mold 2. Therefore, under the action of the elastic die pressing mechanism, the movable plate 21 is driven to move, thereby driving the guide sleeve 20 to move along the length direction of the guide column 3. The guide sleeve 20 and the guide column 3 have a guiding function to ensure that the movable plate 21 will not shift during movement. When the upper mold 27 cooperates with the lower mold 2, the punching of the stator and rotor is completed. At this time, under the action of the cutting disk 28, the stator and rotor that have been punched are cut.

[0029] See also Figure 2-Figure 5 , Figure 8 , Fig. 9 , an elastic die pressing mechanism is provided on the guide component, and an upper mold 27 cooperating with the lower mold 2 is connected to the elastic die pressing mechanism, and the elastic die pressing mechanism includes a fixed column 19 fixedly mounted on the movable plate 21 and symmetrically arranged, and a connecting plate 18 is fixed on the end of the fixed column 19 away from the movable plate 21, and an elastic component connected to the upper mold 27 is provided on the connecting plate 18, wherein the elastic component includes a supporting sleeve 22 fixedly mounted on the connecting plate 18 and symmetrically arranged, a movable rod 24 is slidably mounted in the supporting sleeve 22, and the movable rod 24 is fixedly connected to the upper mold 27, and a spring 26 abutting against the movable rod 24 is fixed in the supporting sleeve 22; it also includes a slot 23 opened on the supporting sleeve 22, and a limit block 25 slidably connected to the slot 23 is fixed on the movable rod 24.

[0030] It should be noted that, in the initial state, the spring 26 is in a compressed state, so that the movable rod 24 is located at the end of the stroke away from the support sleeve 22, and the distance between the upper mold 27 and the movable plate 21 is the largest. When the stator and rotor need to be stamped, at this time, the drive assembly works and drives the connecting plate 18 to move, thereby driving the fixed column 19 to move. The fixed column 19 will also drive the guide sleeve 20 to move along the length direction of the guide column 3 through the movable plate 21. The connecting plate 18 will also drive the support sleeve 22 to move, thereby driving the movable rod 24 to move through the spring 26. The movable rod 24 will also drive the upper mold 27 to move toward the lower mold 2. When the upper mold 27 moves to the position abutting against the lower mold 2, the upper mold 27 no longer moves, and the support sleeve 22 will enter the movable rod 24, so that the limit block 25 moves along The slot 23 moves in the length direction and compresses the spring 26. Under the action of the upper mold 27, the steel plate placed between the upper mold 27 and the lower mold 2 is punched. After the punching is completed, the movable plate 21 continues to move and drives the cutting disk 28 to move. When the cutting disk 28 moves to abut against the steel plate, the steel plate after the punching is completed is cut. At this time, under the action of the driving component, the connecting plate 18 is controlled to move toward the initial position, thereby driving the movable plate 21 to move, so that the cutting disk 28 is separated from the steel plate. At the same time, the spring 26 is elastically released, so that the movable rod 24 moves toward the support sleeve 22 until the limit block 25 returns to the end of the stroke on one side of the slot 23. At this time, the movable rod 24 will drive the upper mold 27 to move toward the initial position, and repeat the above steps to continuously punch the stator and rotor.

[0031] See also Figure 2-Figure 4 , Figure 6 , Figure 7 , a driving assembly is arranged on the support plate 4 and connected to the elastic die pressing mechanism. The driving assembly can drive the guide assembly to move along the length direction of the guide column 3, and adjust the matching state of the upper mold 27 and the lower mold 2 through the elastic die pressing mechanism. The driving assembly includes a motor 5 fixedly mounted on the support plate 4, a crankshaft 6 connected to the output shaft of the motor 5 is rotatably mounted on the support plate 4, a hinged plate 16 is rotatably mounted on the crankshaft 6, and a pull rod 17 fixedly connected to the connecting plate 18 is hinged on the hinged plate 16.

[0032] Furthermore, when the stator and rotor are punched and formed, the motor 5 works and drives the crankshaft 6 to rotate, thereby driving the hinged plate 16 to move. The hinged plate 16 also drives the pull rod 17 to move. Under the action of the pull rod 17, the movement of the connecting plate 18 is controlled. Since the guide column 3 and the guide sleeve 20 have a guiding function, it can ensure that the pull rod 17 moves along the length direction of the guide column 3, thereby controlling the upper mold 27 to reciprocate along the length direction of the guide column 3.

[0033] See also Figure 2-Figure 4 , Figure 6 , Figure 7 , an intermittent conveying mechanism is arranged on the truss 1 and connected to the driving assembly, the intermittent conveying mechanism is connected to a symmetrically arranged conveying roller 14, and the driving assembly can drive the conveying roller 14 to intermittently rotate through the intermittent conveying mechanism, the intermittent conveying mechanism includes a No. 3 rotating rod 13 rotatably mounted on the fixed plate 12 and symmetrically arranged, the No. 3 rotating rod 13 is fixedly connected to the conveying roller 14, two No. 3 rotating rods 13 are respectively fixed with two mutually meshing gears 15, a Maltese cross movement assembly connected to the No. 3 rotating rod 13 is arranged on the support plate 4, wherein the Maltese cross movement assembly includes a No. 1 rotating rod 7 fixedly mounted on the crankshaft 6, a driving wheel 8 is fixed on the No. 1 rotating rod 7, a No. 2 rotating rod 9 is rotatably mounted on the support plate 4, a driven wheel 10 cooperating with the driving wheel 8 is fixed on the No. 2 rotating rod 9, and a belt 11 connected to one of the No. 3 rotating rods 13 is sleeved on the No. 2 rotating rod 9.

[0034] Furthermore, when punching and forming the stator and rotor, it is necessary to control the intermittent movement of the steel plate to continuously punch and form the stator and rotor. In the initial state, the steel sheet can be placed between the two conveyor rollers 14. At this time, the crankshaft 6 rotates and controls the upper mold 27 to move toward the lower mold 2. When the upper mold 27 cooperates with the lower mold 2 and the steel sheet is punched and formed, the upper mold 27 moves in the direction away from the lower mold 2. At the same time, the crankshaft 6 will also drive the No. 1 rotating rod 7 to rotate, thereby driving the driving wheel 8 to move. When the upper mold 27 is separated from the lower mold 2, the driving wheel 8 will It will cooperate with the driven wheel 10 to make the driven wheel 10 rotate. The driven wheel 10 will also drive the No. 2 rotating rod 9 to rotate, and control one of the No. 3 rotating rods 13 to rotate through the belt 11. This No. 3 rotating rod 13 will drive the conveying roller 14 and the gear 15 connected thereto to rotate. Since the two gears 15 are meshed with each other, the other No. 3 rotating rod 13 rotates in the opposite direction, thereby controlling the two conveying rollers 14 to rotate in the opposite direction. Under the action of the conveying roller 14, after the stator and rotor punching sheets are formed, the steel sheets are controlled to move a certain distance to facilitate the subsequent stamping of the steel sheets.

[0035] Preferably, under the action of the driving wheel 8 and the driven wheel 10, after the steel sheet is punched once, and when the upper mold 27 is separated from the lower mold 2, the conveying roller 14 rotates a certain angle to achieve continuous punching of the stator and rotor.

[0036] Taking the embodiment of the combination of all the features recorded in the present application as an example, when in use, when the stator and rotor are punched and formed, at this time, the motor 5 works and drives the crankshaft 6 to rotate, thereby driving the hinge plate 16 to move, and the hinge plate 16 also drives the pull rod 17 to move. Under the action of the pull rod 17, the connecting plate 18 is controlled to move, thereby driving the fixed column 19 to move, and the fixed column 19 also drives the guide sleeve 20 to move along the length direction of the guide column 3 through the movable plate 21, and the connecting plate 18 also drives the support sleeve 22 to move, thereby driving the movable rod 24 to move through the spring 26, and the movable rod 24 also The upper mold 27 will be driven to move toward the lower mold 2. When the upper mold 27 moves to the position abutting the lower mold 2, the upper mold 27 will no longer move, and the supporting sleeve 22 will enter the movable rod 24, so that the limit block 25 moves along the length direction of the slot 23 and compresses the spring 26. Under the action of the upper mold 27, the steel plate placed between the upper mold 27 and the lower mold 2 is punched. When the punching is completed, the movable plate 21 continues to move and drives the cutting disk 28 to move. When the cutting disk 28 moves to abut against the steel plate, the steel plate after the punching is completed is cut. At this time, the curved plate 21 is bent. The shaft 6 will drive the hinge plate 16 to move toward the initial position, thereby controlling the connecting plate 18 to move toward the initial position through the pull rod 17, thereby driving the movable plate 21 to move, so that the cutting disc 28 is separated from the steel plate. At the same time, the spring 26 is elastically released, so that the movable rod 24 moves toward the support sleeve 22 until the limit block 25 returns to the end of the stroke on one side of the slot 23. At this time, the movable rod 24 will drive the upper mold 27 to move toward the initial position. At the same time, the crankshaft 6 will also drive the No. 1 rotating rod 7 to rotate, thereby driving the driving wheel 8 to move. When the upper mold 27 is separated from the lower mold 2, The driving wheel 8 will cooperate with the driven wheel 10 to make the driven wheel 10 rotate. The driven wheel 10 will also drive the No. 2 rotating rod 9 to rotate, and control one of the No. 3 rotating rods 13 to rotate through the belt 11. This No. 3 rotating rod 13 will drive the conveying roller 14 and the gear 15 connected thereto to rotate. Since the two gears 15 are meshed with each other, the other No. 3 rotating rod 13 rotates in the opposite direction, thereby controlling the two conveying rollers 14 to rotate in the opposite direction. Under the action of the conveying roller 14, after the stator and rotor punching sheets are formed, the steel sheets are controlled to move a certain distance to facilitate the subsequent stamping of the steel sheets.

Claims

1. A method for stamping stator and rotor sheets, characterized in that: The following steps are involved: Step 1: Select the appropriate steel and place it on the punch press; Step 2: Pull the steel to the stamping equipment, and under the action of the stamping equipment, stamp the steel to form the outline of the stator and rotor; Step 3: After stamping, the stator and rotor are plastically formed so that the working surfaces of the stator and rotor form a certain curvature to adapt to subsequent installation; Step 4: Surface treatment of the stator and rotor is usually carried out by galvanizing, electroplating and other methods for anti-corrosion and anti-rust treatment. It can also be treated by spray painting or electrophoresis.

2. The method for punching stator and rotor sheets according to claim 1, characterized in that: The stamping equipment in step 2 includes: A truss (1), and a fixing plate (12) and a lower mold (2) fixedly mounted on the truss (1); guide columns (3) symmetrically arranged are also fixed on the truss (1); a support plate (4) is fixed to one end of the guide column (3) facing away from the truss (1).

3. The method for punching stator and rotor sheets according to claim 2, characterized in that: The stamping equipment in step 2 also includes: A guide assembly is arranged on the guide column (3), the guide assembly is provided with an elastic die pressing mechanism, and the elastic die pressing mechanism is connected to an upper die (27) that cooperates with the lower die (2); a driving assembly, arranged on the support plate (4) and connected to the elastic die pressing mechanism, the driving assembly being capable of driving the guide assembly to move along the length direction of the guide column (3), and adjusting the matching state between the upper die (27) and the lower die (2) through the elastic die pressing mechanism; an intermittent conveying mechanism, arranged on the truss (1) and connected to the driving assembly, the intermittent conveying mechanism being connected to symmetrically arranged conveying rollers (14), and the driving assembly being capable of driving the conveying rollers (14) to intermittently rotate through the intermittent conveying mechanism; The guide assembly comprises a guide sleeve (20) slidably mounted on the guide column (3), a movable plate (21) being fixed on the guide sleeve (20), and a cutting disc (28) being fixed on one end of the movable plate (21) facing the truss (1); The elastic die pressing mechanism comprises a fixed column (19) fixedly mounted on the movable plate (21) and symmetrically arranged, a connecting plate (18) being fixed to one end of the fixed column (19) away from the movable plate (21), and an elastic component connected to the upper die (27) being arranged on the connecting plate (18); The elastic component comprises a support sleeve (22) fixedly mounted on the connecting plate (18) and symmetrically arranged, a movable rod (24) being slidably mounted in the support sleeve (22), the movable rod (24) being fixedly connected to the upper mold (27), and a spring (26) being fixed in the support sleeve (22) and abutting against the movable rod (24); It also includes a slot (23) formed on the support sleeve (22), and a limit block (25) slidably connected to the slot (23) is fixed on the movable rod (24); The drive assembly comprises a motor (5) fixedly mounted on the support plate (4); a crankshaft (6) connected to an output shaft of the motor (5) is rotatably mounted on the support plate (4); a hinged plate (16) is rotatably mounted on the crankshaft (6); and a pull rod (17) fixedly connected to the connecting plate (18) is hingedly mounted on the hinged plate (16).

4. The method for punching stator and rotor sheets according to claim 3, characterized in that: The intermittent conveying mechanism comprises a number three rotating rod (13) which is rotatably mounted on the fixed plate (12) and is symmetrically arranged, and the number three rotating rod (13) is fixedly connected to the conveying roller (14).

5. The method for punching stator and rotor sheets according to claim 4, characterized in that: Two mutually meshing gears (15) are respectively fixed to the two third rotating rods (13), and a Maltese cross movement assembly connected to the third rotating rod (13) is provided on the support plate (4).

6. The method for punching stator and rotor sheets according to claim 5, characterized in that: The Maltese cross movement assembly comprises a first rotating rod (7) fixedly mounted on the crankshaft (6), and a driving wheel (8) is fixed on the first rotating rod (7).

7. The method for punching stator and rotor sheets according to claim 6, characterized in that A second rotating rod (9) is rotatably mounted on the support plate (4), a driven wheel (10) cooperating with the driving wheel (8) is fixed on the second rotating rod (9), and a belt (11) connected to one of the third rotating rods (13) is sleeved on the second rotating rod (9).

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