Motor shell forming die

Abstract

The invention relates to the field of die manufacturing, in particular to a motor shell forming die which comprises an upper die base, a lower die base, a punching assembly, a cutting assembly, a pushing assembly, a first bending assembly, a second bending assembly, a bending forming assembly, a burr processing assembly, a discharging assembly and the like, and the punching assembly, the cutting assembly, the pushing assembly, the first bending assembly, the second bending assembly, the bending forming assembly, the burr processing assembly, the discharging assembly and the like are arranged between the upper die base and the lower die base. The cutting assembly cuts an original material strip into a middle material strip in a specific shape, the middle material strip is bent into a cylindrical motor shell step by step through the bending assemblies, the burr treatment assembly carries out burr treatment on the formed motor shell, and the discharging assembly discharges finished products. According to the motor shell forming device, the effects that motor shell forming machining can be efficiently and accurately completed, the quality of the formed motor shell can be guaranteed, the burr influence is reduced, and the production efficiency and the product quality are improved are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of continuous die, in particular to a motor housing forming die. BACKGROUND

[0002] At present, with the rapid development of manufacturing industry, as the core power component in various mechanical equipment, the performance and quality of the motor directly affect the running efficiency and stability of the whole machine. The motor housing, as an important part of protecting the internal structure of the motor, dissipating heat and fixing the motor, its manufacturing precision and efficiency have a crucial influence on the overall performance of the motor. In the field of mechanical manufacturing, the forming technology of motor housing is constantly improving, from the initial manual production to today's automation and high-precision forming, which embodies the leap of mechanical manufacturing technology. In particular, the introduction of continuous die technology enables the production of motor housing to be efficient, precise and batch, greatly reducing production costs and improving market competitiveness.

[0003] In the related art, a forming die for a motor housing mainly includes an upper die, a lower die, and an upper feeding assembly, a punching assembly, a first pushing assembly, a turning assembly, a first bending assembly, and a discharging assembly arranged in sequence along the feeding direction. Some also include a second pushing assembly, a second bending assembly, and a third pushing assembly. The punching assembly includes an upper punch and a lower punch, and the upper punch has a toothed punch. The turning assembly uses a robot vacuum chuck to turn over the product. The bending assembly realizes the bending forming of the metal sheet body through the cooperation of the male die and the female die.

[0004] In the related art, although the forming die for the motor housing has achieved a high degree of automation, including the integration of multiple processes such as feeding, punching, turning, bending, and discharging, there is still a core defect: the burr surface of the motor housing is not ideal during the bending forming process. Specifically, the die in the related art turns over the metal sheet body through the turning assembly before bending, making the punched surface face down as the outside of the housing, reducing the outside burr, but the outside of the bent and formed motor housing may still have convex burrs. These burrs not only affect the appearance of the housing, but also may scratch the stator or other components during motor assembly, increasing the rate of defective products in the production process. SUMMARY

[0005] In order to relate to the field of mold manufacturing, this application particularly relates to a motor housing forming mold, which includes an upper mold base, a lower mold base, and a punching assembly, a cutting assembly, a pushing assembly, a first bending assembly, a second bending assembly, a bending forming assembly, a burr treatment assembly, and a blanking assembly, etc., which are arranged between the upper mold base and the lower mold base. Each component cooperates with each other. The cutting assembly cuts the original material strip into an intermediate material strip of a specific shape, and gradually bends the intermediate material strip into a cylindrical motor housing through each bending assembly. The burr treatment assembly performs burr treatment on the formed motor housing, and the blanking assembly realizes the blanking of the finished product. This application achieves the effect of being able to efficiently and accurately complete the motor housing forming process, and can ensure the quality of the motor housing after forming, reduce the impact of burrs, and improve production efficiency and product quality. This application provides a motor housing forming mold.

[0006] The motor housing forming die provided in this application adopts the following technical solution: A motor housing forming mold, comprising an upper mold base, a lower mold base, a punching assembly, a cutting assembly, a pushing assembly, a first bending assembly, a second bending assembly, a bending forming assembly, a burr removal assembly and a blanking assembly; the punching assembly is arranged between the upper mold base and the lower mold base, and the punching assembly is used to punch the material strip; the cutting assembly is arranged between the upper mold base and the lower mold base, and the cutting assembly is used to cut the original material strip into a rectangular intermediate material strip, and at the same time form a plurality of alternatingly arranged embedded protrusions and embedded grooves on opposite sides of the intermediate material strip; the pushing assembly is arranged on the lower mold base, and the pushing assembly and the first bending assembly are respectively located on opposite sides of the cutting assembly, and the pushing assembly is used to push the intermediate material strip to the first bending assembly; the first bending The bending component is arranged between the upper die base and the lower die base, and the first bending component is used to bend the intermediate material strip of the plane into a wavy surface; the second bending component is arranged between the upper die base and the lower die base, and the second bending component is used to bend the intermediate material strip of the wavy surface into an arc-shaped surface; the bending and forming component is arranged between the upper die base and the lower die base, and the bending and forming component is used to bend the intermediate material strip of the arc-shaped surface into a cylindrical motor housing, and at the same time, the embedded protrusion on one side of the intermediate material strip is embedded in the embedded groove on the other side of the intermediate material strip; the burr processing component is arranged between the bending and forming component and the blanking component, and the burr processing component is used to remove the external convex burrs of the motor housing caused by bending and forming, and the blanking component is used to realize blanking.

[0007] By adopting the technical scheme, the motor shell forming die integrates the upper die seat and the lower die seat as a basic frame, punches the material belt accurately through the punching assembly, cuts the original material belt into a rectangular intermediate material belt through the cutting assembly, and forms embedded protrusions and grooves for subsequent connection. The intermediate material belt is pushed to the first bending assembly and the second bending assembly in sequence through the pushing assembly, is gradually bent into a wave shape and an arc shape, and is finally bent into a cylindrical motor shell through the bending forming assembly to realize embedded connection. In view of the problem that an outer protruding burr exists on the outer side of the motor shell after bending forming in the related art, the burr processing assembly is innovatively arranged on the die, and the burr processing assembly effectively removes the outer protruding burr of the motor shell caused by bending forming after the bending forming assembly completes forming and before the discharging assembly discharges, thereby avoiding the burr from affecting the appearance of the shell and scratching the stator or other components in the motor assembly process, significantly reducing the defective product rate in the production process, and improving the product quality and the production efficiency.

[0008] Optionally, the pushing assembly comprises a pushing cylinder and a pushing block, the pushing cylinder is fixed to the lower die seat, and a piston rod of the pushing cylinder is fixedly connected with the pushing block.

[0009] By adopting the technical scheme, when the motor shell forming die is not working, the pushing assembly is in an initial static state, and the pushing block does not contact the intermediate material belt; after the cutting assembly cuts out the rectangular intermediate material belt, the die control system sends a signal to start the pushing cylinder, the piston in the cylinder pushes the piston rod to extend under the action of gas pressure, drives the pushing block to move forward synchronously, and then applies a forward pushing force to the intermediate material belt, so that the intermediate material belt stably passes through each subsequent bending station in a set direction of the die to complete motor shell forming; after the intermediate material belt is pushed to a specified position, the control system controls the piston rod of the cylinder to retract, and the pushing block is returned to wait for the next time of pushing.

[0010] Optionally, the first bending assembly comprises a first upper bending seat, a first lower bending seat and a first spring assembly, the first upper bending seat is in sliding cooperation with the upper die seat, and the moving direction of the first upper bending seat is the same as the moving direction of the upper die seat; the first spring assembly is arranged between the upper die seat and the upper bending seat, one end of the first spring assembly abuts against the upper surface of the upper die seat, and the other end of the first spring assembly abuts against the lower surface of the upper die seat; the lower surface of the first upper bending seat is provided with a first upper bending groove, and the first upper bending groove is a wave-shaped curved surface; the first lower bending seat is arranged on the upper surface of the lower die seat, the upper surface of the first lower bending seat is provided with a first bending groove, and the second bending groove is a wave-shaped curved surface, and the shape of the first bending groove is matched with the shape of the second bending groove.

[0011] By adopting the technical scheme, in the working process of the motor shell forming die, when the upper die seat moves downward, the first upper bending seat which is in sliding cooperation with the upper die seat and has the same moving direction moves downward together, in this process, the first spring assembly arranged between the upper die seat and the first upper bending seat is compressed, plays a buffering role, and enables the first upper bending seat to move downward stably. The wavy curved first upper bending groove opened on the lower surface of the first upper bending seat is in cooperation with the first lower bending seat arranged on the upper surface of the lower die seat and having the first bending groove with the wavy curved surface opened on the upper surface, when the intermediate material belt is pushed to the first bending assembly, with the upper die seat being pressed downward, the first upper bending seat and the first lower bending seat extrude the intermediate material belt to bend it from the plane shape to the wavy curved surface, and the buffering characteristic of the spring assembly can also avoid damage to the material belt caused by excessive pressing force, thereby ensuring the quality and stability of the bending forming.

[0012] Optionally, the second bending assembly comprises a second upper bending seat, a second lower bending seat and a second spring assembly, the second upper bending seat is in sliding cooperation with the second upper die seat, and the moving direction of the second upper bending seat is the same as the moving direction of the second upper die seat; the second spring assembly is arranged between the upper die seat and the second upper bending seat, the top end of the second spring assembly abuts against the lower surface of the upper die seat, and the bottom end of the second spring assembly abuts against the upper surface of the second upper bending seat; the lower surface of the second upper bending seat is provided with a second upper bending groove, and the lower surface of the second lower bending seat is provided with a second lower bending groove, and the second upper bending groove and the second lower bending groove are both arc grooves.

[0013] By adopting the technical scheme, in the working process of the motor shell forming die, when the upper die seat moves downward, the first upper bending seat which is in sliding cooperation with the upper die seat and has the same moving direction moves downward together, in this process, the first spring assembly arranged between the upper die seat and the first upper bending seat is compressed, plays a buffering role, and enables the first upper bending seat to move downward stably. The wavy curved first upper bending groove opened on the lower surface of the first upper bending seat is in cooperation with the first lower bending seat arranged on the upper surface of the lower die seat and having the first bending groove with the wavy curved surface opened on the upper surface, when the intermediate material belt is pushed to the first bending assembly, with the upper die seat being pressed downward, the first upper bending seat and the first lower bending seat extrude the intermediate material belt to bend it from the plane shape to the wavy curved surface, and the buffering characteristic of the spring assembly can also avoid damage to the material belt caused by excessive pressing force, thereby ensuring the quality and stability of the bending forming.

[0014] Optionally, the bending forming assembly comprises a third upper bending seat, a third lower bending seat, a third spring assembly, a lifting seat, a lifting spring assembly and a forming column; the third upper bending seat is in sliding cooperation with the third upper die seat, the moving direction of the third bending seat is the same as the moving direction of the third upper bending seat; the third spring assembly is arranged between the upper die seat and the third upper bending seat, the top end of the third spring assembly abuts against the lower surface of the upper die seat, and the bottom end of the third spring assembly abuts against the upper surface of the third upper bending seat; the lower surface of the third upper bending seat is provided with an upper bending forming groove, the lower surface of the third lower bending seat is provided with a lower bending forming groove, and the upper bending forming groove and the lower bending forming groove are both arc grooves; the lifting seat is in sliding cooperation with the upper die seat, the moving direction of the lifting seat is the same as the moving direction of the upper die seat, the lifting spring assembly is arranged between the lifting seat and the upper die seat, the top end of the lifting spring assembly abuts against the lower surface of the upper die seat, and the bottom end of the lifting spring assembly abuts against the upper surface of the lifting seat; one end of the forming column is fixedly connected with the lifting seat, the forming column extends in the horizontal direction, and the forming column is located between the third upper bending seat and the third lower bending seat.

[0015] By adopting the above technical scheme, when the motor shell forming die works to the bending forming process, the upper die seat moves downward, driving the third upper bending seat in sliding cooperation therewith to move downward synchronously, the third spring assembly is compressed to play a buffering role, the third upper bending seat moves downward stably, the upper bending forming groove with an arc-shaped groove on the lower surface of the third upper bending seat cooperates with the lower bending forming groove with an arc-shaped groove on the lower surface of the third lower bending seat, and the intermediate material belt which has an optimal arc-shaped curved surface is preliminarily extruded. At the same time, the upper die seat moves downward, driving the lifting seat in sliding cooperation therewith to move downward, the lifting spring assembly is compressed, the forming column fixed to the lifting seat and extending in the horizontal direction extrudes the intermediate material belt from the side during the downward movement of the lifting seat, so that the intermediate material belt is finally bent into a cylindrical motor shell, and the buffering characteristics of the third spring assembly and the lifting spring assembly during the forming process effectively avoid damage to the material belt caused by excessive pressure, ensure the forming precision and quality, and make the motor shell forming more stable and reliable.

[0016] Optionally, the punching assembly comprises an upper punching module and a lower punching module, the upper punching module and the lower punching module are precisely matched, the upper punching module is provided with a plurality of punches, and the lower punching module is provided with a plurality of die holes corresponding to the punches.

[0017] By adopting the above technical scheme, in the working process of the motor shell forming die, when the material belt is conveyed to the punching station, the upper die seat descends to drive the upper punching module to move downward. Since the upper punching module is precisely matched with the lower punching module, and the upper punching module is provided with a plurality of punches corresponding to the die holes of the lower punching module, the punches accurately punch the material belt under the cooperation of the punches and the die holes, so as to punch out holes of corresponding shapes and sizes at the positions of the material belt that need to be punched, and the waste punched out is discharged through the die holes, thereby efficiently and accurately completing the punching process of the material belt, providing a belt hole material belt meeting the requirements for subsequent forming processing of the motor shell, and guaranteeing the quality and precision of the motor shell forming.

[0018] Optionally, the cutting assembly comprises an upper cutter and a lower cutter, the upper cutter is provided with a special cutting edge, and the upper cutter and the lower cutter cooperate to form alternatingly arranged embedded protrusions and embedded grooves on both sides of the material belt during cutting.

[0019] By adopting the above technical scheme, when the material belt is conveyed to the cutting station, the upper die seat descends to drive the upper cutter to move downward. Since the upper cutter is provided with a special cutting edge with a specific profile, and is closely matched with the lower cutter, the upper cutter and the lower cutter cooperate to accurately cut the material belt into a rectangular intermediate material belt of a required size. At the same time, during the cutting process, the special cutting edge with a specific profile of the upper cutter cooperates with the lower cutter to simultaneously form a plurality of alternatingly arranged embedded protrusions and embedded grooves on opposite sides of the intermediate material belt. These embedded structures provide convenience for subsequent connection of the formed motor shell, effectively improve the stability of the connection, and guarantee the overall quality and performance of the motor shell.

[0020] Optionally, the surface of the forming column is provided with a smooth coating, and the smooth coating is a polytetrafluoroethylene coating with a thickness of 0.05-0.2mm.

[0021] By adopting the above technical scheme, in the bending forming process of the motor shell forming die, the forming column moves with the lifting seat to extrude the intermediate material belt to form a cylindrical shape. Since the surface of the forming column is provided with a polytetrafluoroethylene smooth coating with a thickness of 0.05-0.2mm, the coating has a very low friction coefficient, which can effectively reduce the friction between the forming column and the material belt during the contact and extrusion of the two, avoid scratches and damage of the material belt due to friction, and also make the forming column move more smoothly, guarantee the precision of the extrusion forming, and further improve the forming quality and appearance quality of the motor shell.

[0022] Optionally, the discharging assembly comprises a discharging cylinder, a discharging push block and a discharging channel, the discharging cylinder is fixed on the upper die seat, the piston rod of the discharging cylinder is fixedly connected with the discharging push block, the discharging channel is arranged on one side of the lower die seat and corresponds to the working area of the bending forming assembly, and the discharging push block is driven by the discharging cylinder to push the formed motor shell into the discharging channel.

[0023] By adopting the above technical scheme, after the motor shell forming die completes all forming processes, the formed motor shell is in the working area of the bending forming assembly. When the discharging cylinder receives a working signal to start, the piston rod thereof extends outward, and since the piston rod is fixedly connected with the discharging push block, the discharging push block is driven to move synchronously. The discharging push block accurately pushes the formed motor shell into the discharging channel arranged on one side of the lower die seat and corresponding to the working area during movement, thereby realizing automatic discharging of the motor shell. The technical scheme cooperates the discharging cylinder, the discharging push block and the discharging channel to simplify the discharging process, improve production efficiency, reduce errors and damage caused by manual operation, and ensure product quality and production safety.

[0024] Optionally, the burr processing assembly comprises an upper polishing seat, a lower polishing seat, a polishing driving mechanism and a polishing piece; the upper polishing seat is in sliding cooperation with the upper die seat, and the movement direction of the upper polishing seat is the same as the movement direction of the upper die seat; the lower polishing seat is arranged on the lower die seat and is arranged opposite to the upper polishing seat; the polishing driving mechanism is arranged on the upper polishing seat and / or the lower polishing seat and is used to drive the polishing piece to move; the polishing piece comprises an upper polishing piece and a lower polishing piece, the upper polishing piece is arranged on one side of the upper polishing seat facing the lower polishing seat, and the lower polishing piece is arranged on one side of the lower polishing seat facing the upper polishing seat; the upper polishing piece and the lower polishing piece both have polishing surfaces matched with the outer side curved surface of the formed motor shell, after the motor shell is formed by the bending forming assembly, the upper die seat and the lower die seat move relatively to relatively close the upper polishing seat and the lower polishing seat, the polishing surfaces of the upper polishing piece and the lower polishing piece respectively contact the upper and lower parts of the outer side curved surface of the motor shell, and the polishing driving mechanism is used to polish the outer side curved surface of the motor shell.

[0025] By adopting the above technical scheme, after the motor shell is formed by the bending forming assembly, the upper polishing seat which is in sliding cooperation with the upper die seat and has the same moving direction as the upper die seat moves towards the lower polishing seat which is arranged on the lower die seat and opposite to the upper polishing seat. At this time, the upper polishing piece arranged on the side of the upper polishing seat towards the lower polishing seat and the lower polishing piece arranged on the side of the lower polishing seat towards the upper polishing seat and having the polishing surface matched with the outer side curved surface of the formed motor shell, will be in contact with the upper and lower parts of the outer side curved surface of the motor shell respectively. Then, the polishing driving mechanism arranged on the upper polishing seat and / or the lower polishing seat is used to drive the polishing piece to move, so that the outer side curved surface of the motor shell is precisely polished, the convex burrs of the motor shell caused by the bending forming are effectively removed, the surface quality of the motor shell is improved, and the product quality is ensured.

[0026] In summary, the present application has at least one of the following beneficial technical effects: 1. The motor shell forming die integrates punching, cutting, multiple bending, forming, burr treatment and discharging and other multifunctional assemblies. The assemblies work cooperatively to ensure the machining accuracy of each process, and ensure the dimensional accuracy and shape accuracy of the formed motor shell, through precise die cooperation in punching, cutting, bending and other processes, such as the cooperation of the punch of the punching assembly and the die hole, the cooperation of the specific profile cutting edge of the cutting assembly and the lower cutter, and the cooperation of the bending grooves of each bending assembly. 2. The die is provided with a pushing assembly and a discharging assembly to realize automatic pushing of the material belt and automatic discharging of the formed motor shell. The pushing assembly cooperates with the pushing cylinder and the pushing block to push the intermediate material belt to the subsequent bending stations stably under the control of the die control system signal, without manual operation, saving time and labor. 3. Each bending assembly (first bending assembly, second bending assembly, bending forming assembly) is provided with a spring assembly, such as a first spring assembly, a second spring assembly, a third spring assembly and a lifting spring assembly. These spring assemblies play a buffering role in the downward movement of each upper bending seat driven by the upper die seat, so that the upper bending seat can move downward stably, avoiding damage to the material belt caused by unstable downward pressure or downward speed, ensuring the smooth progress of each bending process, ensuring the stability and reliability of the motor shell forming process, and reducing the rate of defective products in the production process. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure schematic view of the motor shell forming die in the embodiment of the present application.

[0028] Figure 2 is a structure schematic view of the motor shell in the embodiment of the present application.

[0029] Figure 3 is a structural schematic view of another perspective of the motor housing in the embodiment of the present application.

[0030] Figure 4 is a structural schematic view of the first upper bending seat and the first lower bending seat in the embodiment of the present application.

[0031] Figure 5 is a structural schematic view of the second upper bending seat and the second lower bending seat in the embodiment of the present application.

[0032] Figure 6 is a structural schematic view of the third upper bending seat and the third lower bending seat in the embodiment of the present application.

[0033] Legend of reference signs: 1, upper die seat; 2, lower die seat; 3, pushing assembly; 31, pushing cylinder; 32, pushing block; 4, first bending assembly; 41, first upper bending seat; 42, first lower bending seat; 43, first upper bending groove; 44, first lower bending groove; 5, second bending assembly; 51, second upper bending seat; 52, second lower bending seat; 53, second upper bending groove; 54, second lower bending groove; 6, bending forming assembly; 61, third upper bending seat; 62, third lower bending seat; 63, forming column; 64, upper bending forming groove; 65, lower bending forming groove; 7, middle material belt; 8, embedded protrusion; 9, embedded groove. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings. Figures 1-6 The present application will be further described in detail.

[0035] The terms used in the present application are merely for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by those skilled in the art to which the present application belongs. The terms "first", "second" and the like used in the present application do not represent any order, number or importance, but are only used to distinguish different components.

[0036] Embodiment 1 The motor housing forming die provided by the embodiment of the present application, with reference to Figure 1 , Figure 2 and Figure 3, the motor housing forming die comprises an upper die seat 1, a lower die seat 2, a punching assembly, a cutting assembly, a pushing assembly 3, a first bending assembly 4, a second bending assembly 5, a bending forming assembly 6, a burr processing assembly and a discharging assembly. The upper die seat 1 and the lower die seat 2 serve as the basic frame of the whole die, providing a mounting and movement support platform for other assemblies. The punching assembly, the cutting assembly, the first bending assembly 4, the second bending assembly 5 and the bending forming assembly 6 are sequentially arranged between the upper die seat 1 and the lower die seat 2, and process the material belt in a specific order, finally processing the original material belt into a cylindrical motor housing. The pushing assembly 3 is arranged on the lower die seat 2 and is responsible for accurately pushing the cut intermediate material belt 7 to the first bending assembly 4. The burr processing assembly is arranged between the bending forming assembly 6 and the discharging assembly and is used to remove the outward protruding burrs of the formed motor housing. The discharging assembly is used to realize the discharging operation of the finished motor housing. In this way, the various assemblies cooperate and work together to realize an efficient and accurate processing process from raw materials to finished products.

[0037] With reference to Figure 1 In the overall working process of the die, a feeding mechanism is arranged to ensure that the material belt can enter each processing station stably and orderly. In operation, the feeding mechanism sequentially feeds the material belt to each processing station such as the punching assembly and the cutting assembly at a set speed and distance, providing stable raw material supply for subsequent processing procedures.

[0038] With reference to Figure 1 Specifically, the punching assembly comprises an upper punching module and a lower punching module. The upper punching module is usually made of high-strength alloy steel, which has high hardness and good wear resistance and can withstand the huge pressure in the punching process. The upper punching module is provided with a plurality of punches, which can be in common shapes such as circular and square. The lower punching module is also made of high-quality alloy steel material and precisely matches the upper punching module. The lower punching module is provided with a die hole corresponding to the punch. The inner wall of the die hole is smooth to ensure that the waste material punched out can be smoothly discharged. In actual application, the punch of the upper punching module can also be made of hard alloy material, which has higher hardness and wear resistance and can prolong the service life of the punch. When the upper die seat 1 descends, the upper punching module is driven to move downward, the punch penetrates the material belt and cooperates with the die hole of the lower punching module to accurately punch the required hole on the material belt, laying a foundation for subsequent processing procedures.

[0039] With reference to Figure 1The cutting assembly includes an upper cutting knife and a lower cutting knife. The upper cutting knife is generally made of high-speed steel material, which has good cutting performance and toughness. The upper cutting knife is provided with a cutting edge with a specific profile, and the cutting edge has a periodic convex structure in the length direction. This structure is to form alternatingly arranged embedded convex structures 8 and embedded grooves 9 on both sides of the cutting strip while cutting the cutting strip. The lower cutting knife cooperates with the cutting edge of the upper cutting knife to form a cutting gap. The lower cutting knife can be made of alloy tool steel, which has high strength and wear resistance. In some special cases, the cutting edge of the upper cutting knife can also be made of ceramic material. The ceramic material has very high hardness and can achieve more precise cutting and forming of convex structures and grooves. When the cutting strip is conveyed to the cutting station, the upper die seat 1 drives the upper cutting knife to move downward. The upper cutting knife and the lower cutting knife jointly cut the original cutting strip into a rectangular intermediate cutting strip 7 and form the required embedded structure on both sides of the cutting strip, which facilitates the subsequent bending and forming process.

[0040] With reference to the foregoing Figure 1 , the pushing assembly 3 includes a pushing cylinder 31 and a pushing block 32. The pushing cylinder 31 is generally a standard pneumatic cylinder, which has the characteristics of simple structure and reliable action, and drives the extension and retraction movement of the piston rod through compressed air. The pushing cylinder 31 is fixed on the lower die seat 2 to ensure its stability during work. The pushing block 32 is usually made of aluminum alloy material, which is light in weight and high in strength. The pushing block 32 is fixedly connected with the piston rod of the pushing cylinder 31. During the working process of the motor housing forming die, after the cutting assembly completes the cutting, the pushing cylinder 31 receives the signal of the control system, the piston rod extends, and drives the pushing block 32 to move forward, so as to smoothly push the intermediate cutting strip 7 to the first bending assembly 4. The pushing cylinder 31 can also be replaced by an electric push rod, which has precise position control ability and can more accurately push the intermediate cutting strip 7.

[0041] With reference to the foregoing Figure 1 , Figure 2 , Figure 3 and Figure 4, the first bending assembly 4 comprises a first upper bending seat 41, a first lower bending seat 42 and a first spring assembly. The first upper bending seat 41 is in sliding fit with the upper die seat 1, and the moving direction of the first upper bending seat 41 is the same as the moving direction of the upper die seat 1. The first upper bending seat 41 can be made of cast iron material, and has good rigidity and damping performance. The lower surface of the first upper bending seat 41 is provided with a wavy first upper bending groove 43, and the shape of the first upper bending groove 43 determines the wavy shape of the intermediate strip 7 after the first bending. The first lower bending seat 42 is arranged on the upper surface of the lower die seat 2 and is made of cast steel material, and has high strength. The upper surface of the first lower bending seat 42 is provided with a wavy first lower bending groove 44 which is matched with the shape of the first upper bending groove 43. The first spring assembly is arranged between the upper die seat 1 and the first upper bending seat 41, and the spring is generally a high-strength coil spring which has good elasticity and buffering performance. During the motor shell forming process, when the upper die seat 1 goes down, the first upper bending seat 41 goes down together, and the first spring assembly is compressed to play a buffering role, thereby avoiding excessive impact force on the intermediate strip 7. The bending grooves of the first upper bending seat 41 and the first lower bending seat 42 cooperate with each other to bend the planar intermediate strip 7 into a wavy curved surface. The first spring assembly can also be a rubber buffer pad which has good buffering and shock-absorbing effect and can reduce vibration and noise during the bending process.

[0042] With reference to Figure 1 , Figure 2 , Figure 3 and Figure 5 , the second bending assembly 5 comprises a second upper bending seat 51, a second lower bending seat 52 and a second spring assembly. The second upper bending seat 51 is in sliding fit with the upper die seat 1 and is made of steel material, and has high strength and precision. The lower surface of the second upper bending seat 51 is provided with an arc-shaped second upper bending groove 53, and the curvature of the second upper bending groove 53 is designed according to the required optimal arc-shaped curved surface. The second lower bending seat 52 is arranged on the upper surface of the lower die seat 2 and is made of alloy steel material, and the lower surface thereof is provided with an arc-shaped second lower bending groove 54 which is matched with the shape of the second upper bending groove 53. The second spring assembly is arranged between the upper die seat 1 and the second upper bending seat 51, and is also a coil spring. The second spring assembly plays a buffering role during the downward movement of the second upper bending seat 51 to ensure the stability of the bending process. When the intermediate strip 7 is pushed to the second bending assembly 5, the upper die seat 1 drives the second upper bending seat 51 to go down, the second spring assembly is compressed, and the arc-shaped grooves of the second upper bending seat 51 and the second lower bending seat 52 cooperate to further bend the wavy curved intermediate strip 7 into an optimal arc-shaped curved surface. The second spring assembly can also be a disc spring which has large bearing capacity and small deformation and can better adapt to different working pressures.

[0043] With reference to Figure 1 , Figure 2 , Figure 3and Figure 6 The bending and forming assembly 6 includes a third upper bending seat 61, a third lower bending seat 62, a third spring assembly, a lifting seat, a lifting spring assembly and a forming column 63. The third upper bending seat 61 is in sliding fit with the upper die seat 1, and can be made of stainless steel, which has good corrosion resistance and strength. An arc-shaped upper bending forming groove 64 is formed on the lower surface of the third upper bending seat 61. The third lower bending seat 62 is arranged on the upper surface of the lower die seat 2 and is made of alloy structural steel, and an arc-shaped lower bending forming groove 65 is formed on the lower surface of the third lower bending seat 62, which is matched with the shape of the upper bending forming groove 64. The third spring assembly is arranged between the upper die seat 1 and the third upper bending seat 61, and is made of high-strength spring, which is used to buffer the impact force when the upper die seat 1 goes down. The lifting seat is in sliding fit with the upper die seat 1, and the moving direction of the lifting seat is the same as the moving direction of the upper die seat 1. The lifting spring assembly is arranged between the lifting seat and the upper die seat 1, and is also made of high-quality spring, which ensures the smooth lifting of the lifting seat. The forming column 63 is fixed to the lifting seat and extends horizontally between the third upper bending seat 61 and the third lower bending seat 62. The surface of the forming column 63 is coated with polytetrafluoroethylene, which has very low friction coefficient and can reduce the friction between the forming column 63 and the intermediate strip 7. In actual application, the material of the forming column 63 can also be titanium alloy, which has the characteristics of small density and high strength. When the intermediate strip 7 with the optimal arc surface reaches the bending and forming station, the upper die seat 1 goes down, driving the third upper bending seat 61 and the lifting seat to go down together, and the third spring assembly and the lifting spring assembly are compressed. The arc-shaped grooves of the third upper bending seat 61 and the third lower bending seat 62 preliminarily extrude the intermediate strip 7, and at the same time, the forming column 63 extrudes the intermediate strip 7 from the side, so that the intermediate strip 7 is finally bent into a cylindrical motor shell, and the embedded protrusion 8 on one side of the intermediate strip 7 is embedded in the embedded groove 9 on the other side, completing the forming of the motor shell.

[0044] With reference to Figure 1The burr processing assembly includes an upper grinding seat, a lower grinding seat, a grinding drive mechanism and a grinding piece. The upper grinding seat is slidably matched with the upper die seat 1, and is usually made of aluminum alloy, which is light in weight and easy to move. The lower grinding seat is fixed to the lower die seat 2 and arranged opposite to the upper grinding seat. The lower grinding seat can be made of cast iron material and has good stability. The grinding drive mechanism can be a rotating shaft driven by a motor or a pneumatically driven swinging device, which is connected to the upper grinding seat or the lower grinding seat to drive the grinding piece to move. The grinding piece includes an upper grinding piece arranged on the side of the upper grinding seat facing the lower grinding seat and a lower grinding piece arranged on the side of the lower grinding seat facing the upper grinding seat. Both the upper grinding piece and the lower grinding piece have a grinding surface adapted to the outer curved surface of the motor housing, and the grinding surface can be made of grinding materials such as sandpaper or grinding wheel. After the motor housing is formed by the bending forming assembly 6, the upper die base 1 and the lower die base 2 move relative to each other, so that the upper grinding seat and the lower grinding seat are relatively close, and the grinding surfaces of the upper grinding piece and the lower grinding piece are in contact with the upper and lower parts of the outer curved surface of the motor housing respectively. The grinding drive mechanism drives the grinding piece to move to grind the outer curved surface of the motor housing, effectively removing the external burrs and improving the surface quality of the motor housing.

[0045] Continue to refer to Figure 1 The blanking assembly includes a blanking cylinder, a blanking push block and a blanking channel. The blanking cylinder generally adopts a small pneumatic cylinder, which is easy to install and quick to move. The blanking cylinder is fixed to the upper die base 1, and the blanking push block is fixedly connected to the piston rod of the blanking cylinder. The blanking push block can be made of plastic material, which is light in weight and will not cause damage to the motor casing. The blanking channel is located on one side of the lower die base 2 and corresponds to the working area of ​​the bending and forming assembly 6. The blanking channel is usually made of stainless steel sheet with a smooth inner wall to facilitate the sliding of the motor casing. When the motor casing is completed in forming and deburring, the blanking cylinder is started, the piston rod is extended, and the blanking push block is driven to push the formed motor casing into the blanking channel to realize the blanking operation of the finished product.

[0046] The working principle of this embodiment is as follows: This motor housing forming die achieves integrated processing from raw material to finished product. Each component has a clear division of labor. The punching component provides the necessary holes for the material strip, the cutting component cuts and forms the embedded structure, the pushing component 3 ensures the orderly transport of the material strip, the multiple bending component gradually bends the material strip into the desired shape, the burr removal component solves the problem of unsatisfactory burr removal in traditional molds, and the blanking component realizes automatic blanking of the finished product.

[0047] Example 2 Reference Figure 1The difference between the embodiment and the above-mentioned embodiments is that the pushing assembly 3 adopts a lead screw transmission mechanism and a sliding block to replace the pushing cylinder 31 and the pushing block 32. The lead screw transmission mechanism includes a motor, a lead screw and a nut. The motor is fixed on the lower die seat 2. The output shaft of the motor is connected with the lead screw to drive the lead screw to rotate. The nut is threadedly connected with the lead screw. The sliding block is fixedly connected with the nut. When the motor is started, the lead screw rotates, the nut moves on the lead screw, thereby driving the sliding block to move, and the sliding block pushes the intermediate material belt 7 to move to the first bending assembly 4. The lead screw transmission mechanism has the advantages of high transmission precision and accurate positioning, and can more accurately control the pushing position and distance of the material belt. In some occasions where the pushing precision of the material belt is required to be high, the alternative solution of the pushing assembly 3 is more suitable.

[0048] The implementation principle of the embodiment is that the pushing assembly 3 composed of the lead screw transmission mechanism and the sliding block pushes the intermediate material belt 7 by driving the lead screw to rotate by the motor, converting the rotary motion of the motor into the linear motion of the nut and the sliding block. This transmission mode is more stable and accurate than the pushing cylinder 31, can improve the accuracy of pushing the material belt, and further improve the precision and quality of the motor shell forming, and is especially suitable for the motor shell production scene with high forming precision requirement, and is an effective improvement and optimization of the traditional pushing assembly 3.

[0049] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A motor housing forming die characterized by: The utility model relates to a kind of material pushing assembly and material pushing method, including upper die holder (1), lower die holder (2), punch assembly, cutting assembly, push material assembly (3), first bending assembly (4), second bending assembly (5), bending forming assembly (6), burr removal assembly and blanking assembly;The punch assembly is arranged between the upper die holder (1) and the lower die holder (2), and the punch assembly is used to punch the material belt;The cutting assembly is arranged between the upper die holder (1) and the lower die holder (2), and the cutting assembly is used to cut the original material belt into rectangular intermediate material belt (7), while forming a plurality of alternating arrangement embedded protrusions (8) and embedded grooves (9) on the opposite sides of intermediate material belt (7);The push material assembly (3) is arranged on the lower die holder (2), and the push material assembly (3) and the first bending assembly (4) are located on the opposite sides of cutting assembly respectively, and the push material assembly (3) is used to push the intermediate material belt (7) to the first bending assembly (4);The first bending assembly (4) is arranged between the upper die holder (1) and the lower die holder (2), and the first bending assembly (4) is used to bend the intermediate material belt (7) into wave-shaped surface from plane;The second bending assembly (5) is arranged between the upper die holder (1) and the lower die holder (2), and the second bending assembly (5) is used to bend the intermediate material belt (7) into superior arc-shaped surface from wave-shaped surface;The bending forming assembly (6) is arranged between the upper die holder (1) and the lower die holder (2), and the bending forming assembly (6) is used to bend the intermediate material belt (7) into cylindrical motor housing from superior arc-shaped surface, while embedding the embedded protrusion (8) on one side of intermediate material belt (7) in the embedded groove (9) on the other side of intermediate material belt (7);The burr processing assembly is arranged between the bending forming assembly (6) and the blanking assembly, and the burr processing assembly is used to remove the outer protruding burr of motor housing due to bending forming, and the blanking assembly is used to realize blanking.

2. A motor housing forming die according to claim 1, characterized in that: The push material assembly (3) includes push material cylinder (31) and push material block (32), the push material cylinder (31) is fixed on the lower die holder (2), and the piston rod of the push material cylinder (31) is fixedly connected with the push material block (32).

3. A motor housing forming die according to claim 1, wherein: The first bending assembly (4) comprises a first upper bending seat (41), a first lower bending seat (42) and a first spring assembly, the first upper bending seat (41) is in sliding fit with the upper die seat (1), the moving direction of the first bending seat is the same as the moving direction of the upper die seat (1); the first spring assembly is arranged between the upper die seat (1) and the upper bending seat, one end of the first spring assembly abuts against the upper surface of the upper die seat (1), and the other end of the first spring assembly abuts against the lower surface of the upper die seat (1); the lower surface of the first upper bending seat (41) is provided with a first upper bending groove (43), the first upper bending groove (43) is a wavy curved surface; the first lower bending seat (42) is arranged on the upper surface of the lower die seat (2), the upper surface of the first lower bending seat (42) is provided with a first bending groove, the second bending groove is a wavy curved surface, and the shape of the first bending groove is matched with the shape of the second bending groove.

4. A motor housing forming die according to claim 1, wherein: The second bending assembly (5) comprises a second upper bending seat (51), a second lower bending seat (52) and a second spring assembly, the second upper bending seat (51) is in sliding fit with the second upper die seat (1), the moving direction of the second bending seat is the same as the moving direction of the second upper bending seat (51); the second spring assembly is arranged between the upper die seat (1) and the second upper bending seat (51), the top end of the second spring assembly abuts against the lower surface of the upper die seat (1), and the bottom end of the second spring assembly abuts against the upper surface of the second upper bending seat (51); the lower surface of the second upper bending seat (51) is provided with a second upper bending groove (53), the lower surface of the second lower bending seat (52) is provided with a second lower bending groove (54), and the second upper bending groove (53) and the second lower bending groove (54) are both arc grooves.

5. A motor housing forming die according to claim 1, wherein: The bending forming assembly (6) comprises a third upper bending seat (61), a third lower bending seat (62), a third spring assembly, a lifting seat, a lifting spring assembly and a forming column (63); the third upper bending seat (61) is in sliding cooperation with the third upper die seat (1), the moving direction of the third bending seat is the same as the moving direction of the third upper bending seat (61); the third spring assembly is arranged between the upper die seat (1) and the third upper bending seat (61), the top end of the third spring assembly abuts against the lower surface of the upper die seat (1), and the bottom end of the third spring assembly abuts against the upper surface of the third upper bending seat (61); the lower surface of the third upper bending seat (61) is provided with an upper bending forming groove (64), the lower surface of the third lower bending seat (62) is provided with a lower bending forming groove (65), and the upper bending forming groove (64) and the lower bending forming groove (65) are both arc grooves; the lifting seat is in sliding cooperation with the upper die seat (1), the moving direction of the lifting seat is the same as the moving direction of the upper die seat (1), the lifting spring assembly is arranged between the lifting seat and the upper die seat (1), the top end of the lifting spring assembly abuts against the lower surface of the upper die seat (1), and the bottom end of the lifting spring assembly abuts against the upper surface of the lifting seat; one end of the forming column (63) is fixedly connected with the lifting seat, the forming column (63) extends along the horizontal direction, and the forming column is located between the third upper bending seat (61) and the third lower bending seat (62).

6. A motor housing forming die according to claim 1, wherein: The punching assembly comprises an upper punching module and a lower punching module, which are precisely matched, the upper punching module is provided with a plurality of punches, and the lower punching module is provided with a plurality of die holes.

7. A motor housing forming die according to claim 1, wherein: The cutting assembly comprises an upper cutter and a lower cutter, the upper cutter is provided with a special cutting edge, and the upper cutter and the lower cutter cooperate to form alternatingly arranged embedding protrusions (8) and embedding grooves (9) on both sides of the cut material belt.

8. A motor housing forming die according to claim 5, wherein: The surface of the forming column (63) is provided with a smooth coating, the smooth coating is a polytetrafluoroethylene coating, and the thickness of the smooth coating is 0.05-0.2mm.

9. A motor housing forming die according to claim 1 wherein: The blanking assembly comprises a blanking cylinder, a blanking push block and a blanking channel, the blanking cylinder is fixed on the upper die seat (1), the piston rod of the blanking cylinder is fixedly connected with the blanking push block, the blanking channel is arranged on one side of the lower die seat (2) and corresponds to the working area of the bending forming assembly (6), and the blanking push block is driven by the blanking cylinder to push the formed motor shell into the blanking channel.

10. A motor housing forming die according to claim 1, wherein: The burr processing assembly comprises an upper polishing seat, a lower polishing seat, a polishing driving mechanism and a polishing piece; the upper polishing seat is in sliding fit with the upper die seat (1), the moving direction of the upper polishing seat is the same as the moving direction of the upper die seat (1); the lower polishing seat is arranged on the lower die seat (2) and is oppositely arranged with the upper polishing seat; the polishing driving mechanism is arranged on the upper polishing seat and / or the lower polishing seat and is used for driving the polishing piece to move; the polishing piece comprises an upper polishing piece and a lower polishing piece, the upper polishing piece is arranged on one side of the upper polishing seat facing the lower polishing seat, and the lower polishing piece is arranged on one side of the lower polishing seat facing the upper polishing seat; the upper polishing piece and the lower polishing piece both have polishing surfaces matched with the outer side curved surface of the motor shell after being formed, after the motor shell is formed by the bending forming assembly (6), the upper die seat (1) and the lower die seat (2) relatively move, the upper polishing seat and the lower polishing seat relatively approach, the polishing surfaces of the upper polishing piece and the lower polishing piece respectively contact the upper and lower parts of the outer side curved surface of the motor shell, and the outer side curved surface of the motor shell is polished under the action of the polishing driving mechanism.

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