Automobile motor claw pole plate forming die and automobile motor claw pole plate forming method

Abstract

The present invention discloses a claw pole plate forming mold for automobile motors and a claw pole plate forming method for automobile motors, comprising an upper mold group and a lower mold group arranged up and down, wherein the upper mold group and the lower mold group are equipped with a gear cutting station, a gear turning preforming station and a gear turning station along the conveying direction of the material belt; the gear cutting station, the gear turning preforming station and the gear turning station are formed by a convex mold located in the upper mold group and a concave mold located in the lower mold group; the gear cutting station is suitable for cutting a tooth shape on the claw pole plate of the material belt so that a plane pole tooth is formed on the inner periphery of the claw pole plate; the gear turning preforming station is suitable for folding the plane pole tooth to form an inclined pole tooth, and the folding angle is less than 90°; the gear turning station is suitable for further folding the inclined pole tooth to a right angle. The mold of the present invention sequentially arranges a gear cutting station, a gear turning preforming station and a gear turning station along the conveying direction of the material belt, which can realize high-speed continuous and automated production of claw poles, improves production efficiency and reduces the production cost of a single part.

Description

Technical Field

[0001] The invention relates to the technical field of metal smelting, and in particular to a claw pole plate forming die and a claw pole plate forming method for an automobile motor. Background Art

[0002] The claw pole plates of the automotive high-efficiency claw pole motor have a simple shape (such as Figure 1 As shown in the figure, the dimensional accuracy requirements are high, the annual demand is large, and the product requirements are stable performance, reliable quality, and durable. Product quality has always been the goal pursued by major motor manufacturers, and the quality of the mold determines the quality of the stamping parts, so the rational design of the mold structure is increasingly valued. The claw plate parts have very high requirements for the tooth shape, the pole tooth height consistency, the pole tooth arc profile, and the pole tooth needs to be thinned during the tooth forming process, such as Figure 2 The thickness of the claw pole plate 1 is 0.8 mm, and the thickness of the pole tooth 101 after the tooth turning is (19.8-18.4) / 2=0.7 mm. The thickness of the pole tooth 101 needs to be thinned by 0.1 mm. Figure 3 The top shape of the pole tooth 101 is shown. The material of the top of the pole tooth 101 is required to be flat without burrs and protrusions. Figure 4 The arc size of the pole tooth 101 (the inner arc radius R1 and the outer arc radius R2 of the root of the pole tooth 101) is shown. The arc of the pole tooth 101 requires a uniform gap with the rotor 44. These shapes and sizes will directly affect the performance of the entire motor, so they must be strictly controlled during production.

[0003] Due to production cost considerations, traditional single-process molds use a one-step tooth forming process in the tooth shape design during the mold development stage. This can reduce one process and save a machine tool and an operator. Although this process solution has great advantages in cost control in the early stages of production, according to market trends, product quality determines the product life cycle. Therefore, the traditional single-process mold structure can no longer meet the market's quality requirements for products, and the production capacity of the traditional single-process mold structure is seriously backward. Therefore, it is necessary to adopt an automated continuous mold production method without increasing machine tools and personnel.

[0004] Figure 5 The figure shows the actual shape of the pole tooth 101 end of the claw pole plate 1 produced by a traditional single-process mold. This shape is due to the fact that during the tooth turning process, the tooth shape needs to be thinned, and the tooth shape design is a one-step tooth turning forming process. During the tooth turning process, the tooth turning punch pulls down the material close to the tooth turning punch, forming the shape shown in the figure, and forming severe tensile stress on the surface of the pole tooth. The actual data shows that the height dimension A and the width dimension B of the pole tooth end face deformation are affected by the size of the pole tooth and the thinning of the pole tooth material. The part of the material pulled out will have an adverse effect on the performance of the motor.

[0005] Since the material is deformed by extrusion, plastic deformation is accompanied by elastic deformation in the initial stage of tooth forming. After the tooth forming is completed, the elastic deformation is released, so the arc size after forming will be larger than the theoretical design arc size (R1 and R2 are both larger). As a result, the gap between the arc contact surface of the rotor and the stator pole plate is uneven. The distance between the middle part of the pole tooth 101 and the rotor 44 reaches the theoretical design gap m, while the distance between the part of the pole tooth 101 close to the two side surfaces and the rotor 44 is greater than the theoretical design gap m. Figure 6 shown.

[0006] In summary, the existing motor claw pole plate forming mold and process have the following disadvantages:

[0007] 1. The composite stamping process of punching and blanking is adopted to complete the outer shape and inner hole of the product at one time. If the cutting edge is damaged in any part of the outer shape or the inner shape, the cutting edge of the inner shape and the outer shape must be ground together. This will cause the cutting edge that does not need to be ground to be ground together, which will eventually reduce the life of the entire mold cutting edge, aggravate the consumption of mold spare parts, and increase the cost of mold use.

[0008] 2. After the mold is used for a long time, the punching burrs of the product increase. Due to the lack of deburring technology, the burrs perpendicular to the material thickness direction after the teeth are turned are pressed into burrs parallel to the material thickness direction. There are many pole teeth in the claw pole motor. Due to various external factors in the later stage, the burrs fall off and easily cause the motor to short-circuit and burn. If the pole teeth are deburred by special deburring equipment after the pole teeth are formed, the operation is troublesome and the cost investment is high.

[0009] 3. The one-time tooth-turning forming process is adopted. Due to the thinning of the teeth during turning, the extrusion and pulling forces on the mold parts are very large during the forming process, and the wear of the punch and die is very serious, which aggravates the consumption of mold spare parts and increases the cost of mold spare parts. Secondly, since the stamping raw material is cold-rolled plate, it has its own grain direction. During the tooth turning, the tensile strength of the material parallel to the grain direction is large, and the tensile strength of the material perpendicular to the grain direction is small. During the tooth turning process, the material flow speed and resistance are inconsistent, resulting in inconsistent thickness and height of the pole teeth after forming. The pole teeth parallel to the material grain direction are thick and short, and the pole teeth perpendicular to the material grain direction are thin and high. The greater the pulling force during the tooth turning, the greater the size difference of the pole teeth, which ultimately affects the stability of the motor performance. Summary of the invention

[0010] In order to solve the technical problem in the prior art that claw pole plates are formed by one-time tooth turning, the pole teeth are subjected to excessive pulling force, resulting in deformation of the pole teeth, thereby affecting the performance of the motor, the present invention provides a claw pole plate forming mold and a forming process method for an automobile motor to solve the above problem.

[0011] The present invention proposes a claw pole plate forming mold for an automobile motor, comprising an upper mold group and a lower mold group arranged up and down, wherein the upper mold group and the lower mold group are equipped with a gear cutting station, a gear turning preforming station and a gear turning station along the conveying direction of the material belt; the gear cutting station, the gear turning preforming station and the gear turning station are formed by a convex mold located in the upper mold group and a concave mold located in the lower mold group; the gear cutting station is suitable for cutting a tooth shape on the claw pole plate of the material belt so that a plane pole tooth is formed on the inner periphery of the claw pole plate; the gear turning preforming station is suitable for folding the plane pole tooth to form an inclined pole tooth, and the folding angle is less than 90°; the gear turning station is suitable for further folding the inclined pole tooth into a right angle.

[0012] Furthermore, the gear flanging preforming station includes a preforming punch and a preforming die that cooperate with each other. The preforming die is located at the top of the lower die group. The preforming punch extends from the upper die group to the preforming die. The preforming punch and the preforming die have mutually cooperating conical surfaces with gradually increasing diameters from bottom to top.

[0013] Furthermore, the gear turning station includes a gear turning punch and a gear turning die that cooperate with each other, the gear turning die is located at the top of the lower die group, the gear turning punch extends from the upper die group to the gear turning die, and the gear turning die and the gear turning punch have mutually cooperating cylindrical surfaces with a constant diameter from bottom to top.

[0014] Furthermore, the distance between two adjacent stations among the gear cutting station, gear preforming station and gear turning station is equal or a multiple of each other, and there is one or more empty stations between two stations with a larger distance, so that the distance between every two adjacent stations is equal.

[0015] Furthermore, the gear cutting station includes a tooth-shaped punch and a tooth-shaped die that cooperate with each other. The tooth-shaped die is located at the top of the lower die group. The tooth-shaped punch extends from the upper die group to the tooth-shaped die. The end face shape of the tooth-shaped punch is the same as the tooth shape of the claw pole plate.

[0016] Furthermore, it also includes a blanking station located in front of the gear turning station, and the blanking station is formed by a blanking punch located in the upper die group and a blanking die located in the lower die group. The blanking die is suitable for accommodating the claw pole plate, and the end face shape of the blanking punch is the same as the outer edge shape of the claw pole plate.

[0017] Furthermore, it also includes a deburring station located between the tooth cutting station and the tooth preforming station, the deburring station has a deburring component protruding from the surface of the lower mold group, the surface shape of the deburring component is the same as the inner circumferential hole shape of the claw pole plate after the planar pole teeth are formed, so that the planar pole teeth and the deburring component are engaged with each other.

[0018] Furthermore, the edges of the upper end surface and the lower end surface of the deburring component are both chamfered.

[0019] Furthermore, the height d of the deburring component is smaller than the thickness of the material strip.

[0020] Furthermore, the cone angle n of the frustum is between 60° and 70°.

[0021] Furthermore, the upper die group includes an upper die base and a stripping plate, and the upper die base and the stripping plate are movably connected by an elastic reset rod; each of the punches is connected to the upper die base and is suitable for passing through the stripping plate; the lower die group includes a lower die base; when the punch press moves downward, the upper die group presses the lower die group until the stripping plate fits with the upper die base and the lower die base, at which time the elastic reset rod contracts; when the punch press moves upward, the stripping plate is reset under the action of the elastic reset rod, and at this time the stripping plate is separated from the upper die base and the lower die base.

[0022] Furthermore, a lower die push rod and a pressure spring suitable for lifting the lower die push rod are provided in the tooth-turning die. The lower end of the tooth-turning punch has a protrusion suitable for passing through the claw pole plate. When the upper die group is pressed against the lower die group, the lower die push rod abuts against the protrusion.

[0023] Furthermore, the lower die assembly has a floating pin suitable for lifting the material strip, and the floating pin is elastically connected to the lower die base.

[0024] The present invention also proposes a method for forming a claw pole plate of an automobile motor. The method adopts the automobile motor claw pole plate forming mold described above, and includes the following steps: S1: tooth cutting, conveying the material strip to the tooth cutting station, performing tooth-shaped cutting on the material strip, so that the inner periphery of the claw pole plate forms a planar pole tooth; S2: tooth flipping preforming, continuing to convey the material strip until the claw pole plate in step S1 reaches the tooth flipping preforming station, and folding the planar pole tooth for the first time to form an inclined pole tooth; S3: tooth flipping, continuing to convey the material strip until the claw pole plate in step S2 reaches the tooth flipping station, and continuing to fold the inclined pole tooth to a right angle.

[0025] Furthermore, after the tooth cutting in step S1 is completed, the surface of the claw pole plate 1 is first deburred, and then the tooth preforming in step 2 is performed; the claw pole plate 1 in step S1 is sent to the deburring station to remove the burrs on the surface of the planar pole teeth 2.

[0026] The beneficial effects of the present invention are:

[0027] (1) The mold of the present invention sequentially arranges a gear cutting station, a gear preforming station, and a gear turning station along the conveying direction of the material belt, which can realize high-speed (350SPM) continuous automatic production of claw poles, improve production efficiency, and reduce the production cost of a single part. Each process has a separate station to ensure the accuracy requirements of each process, effectively ensuring the qualified rate of pole teeth.

[0028] (2) The present invention adopts a continuous mold production process. Due to the separation of process steps and the modularization of parts, local damage does not affect other related mold parts and only requires local repair or replacement, which greatly reduces the number of unnecessary edge grinding times and extends the service life of mold parts.

[0029] (3) The present invention adds a pole tooth deburring process to eliminate the pole tooth burrs in the mold. This reduces the risk of burrs falling off and burning the motor after the whole machine is assembled, and does not require additional deburring equipment to deburr the pole teeth, thus saving labor time and equipment cost investment.

[0030] (4) Since the present invention has a gear preforming process, the pole teeth can be pressed from a flat plate shape to an inclined shape before gear turning, and the pole tooth raw material can be pressed to a required thickness so that the surface of the pole tooth raw material is in a state of compressive stress, thereby reducing the tensile stress of the gear turning station in the subsequent process, increasing the stability of the product after gear turning, and improving the performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Figure 1 is a top view of the claw pole plate processed by the present invention;

[0033] Figure 2 is a schematic diagram of the cross-sectional dimensions of a specific embodiment of a claw pole plate processed using a mold of the prior art;

[0034] Figure 3 This is a schematic diagram of the requirements for the pole tooth end face of a qualified claw pole plate;

[0035] Figure 4 It is a schematic diagram of the arc at the root of the pole tooth after the claw pole plate is turned and formed;

[0036] Figure 5 It is a schematic diagram of the cross-sectional dimensions of a claw pole plate processed using a mold of the prior art (the pole tooth end face is enlarged);

[0037] Figure 6 It is a schematic diagram of the distance between the pole tooth root and the rotor after the claw pole plate processed by the mold of the prior art is assembled with the rotor;

[0038] Figure 7 It is a schematic diagram of the mold opening state of the mold of the present invention;

[0039] Figure 8 is a schematic diagram of the mold in a closed state according to the present invention;

[0040] Fig. 9 is a top view of the deburring insert of the present invention;

[0041] Fig.10is a front view of the deburring insert of the present invention;

[0042] Fig.11 This is a cross-sectional view of the end face of the pole tooth before deburring;

[0043] Fig.12 This is a cross-sectional view of the end face of the pole tooth after the pole tooth is deburred;

[0044] Fig.13 It is a front view of the preforming convex mold in the present invention;

[0045] Fig.14 It is a cross-sectional schematic diagram of the preforming concave mold in the present invention;

[0046] Fig.15 It is a schematic diagram of the forming process on the surface of the material strip during the processing of the automobile motor claw pole plate forming method of the present invention (the front view and the top view correspond).

[0047] In the figure, 1, claw pole plate, 101, pole teeth, 102, small holes, 2, plane pole teeth, 3, inclined pole teeth, 4, upper die seat, 5, unloading plate, 6, rod body, 7, reset spring, 8, upper pad, 9, fixing plate, 10, stop plate, 11, bushing, 12, tooth-shaped punch, 13, pre-forming punch, 14, tooth-turning punch, 1401, convex block, 15, tooth-shaped die, 16, pre-forming die, 1601, pre-forming hole, 17, tooth-turning die, 1701, tooth-turning hole, 18, punch fixing block, 19, first pin, 20, round table surface, 21, second pin, 22, lower die ejector , 23. Pressure spring, 24. Guide pin, 25. Inner guide column, 26. Guide hole, 27. Inner guide sleeve, 28. Floating pin, 29. Floating spring, 30. First screw plug, 31. Second screw plug, 32. Empty station, 33. Material strip, 3301. Guide hole, 34. Round hole punch, 35. Round hole die, 36. Blanking punch, 37. Blanking die, 38. Third pin, 39. Deburring insert, 3901. Chamfer, 3902. Deburring component, 40. Pole tooth card gap, 41. Lower die seat, 42. Lower template, 43. Lower pad, 44. Rotor, 45. Adjustment tooth block. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] In the present invention, the conveying direction of the material belt 33 is regarded as the front, and the opposite direction of the conveying direction of the material belt 33 is regarded as the rear.

[0050] A claw pole plate forming die for an automobile motor comprises an upper die set and a lower die set arranged up and down, the lower die set is fixed, the upper die set is driven to rise or fall by a stamping device, a material strip 33 is located between the upper die set and the lower die set, and the upper die set and the lower die set are equipped with a gear cutting station, a gear preforming station and a gear flipping station along the conveying direction of the material strip 33; the gear cutting station, the gear preforming station and the gear flipping station are formed by a convex die located in the upper die set and a concave die located in the lower die set; the material strip 33 is conveyed from one end of the die to the other end by a feeder, and is sequentially pressed in the upper die set The upper die group stays at the corresponding station between the upper die group and the lower die group, and the claw pole plate 1 on the material strip 33 is processed by the stamping of the upper die group. First, the claw pole plate 1 of the material strip 33 is cut into a tooth shape at the tooth cutting station to form a plane pole tooth 2 on the inner periphery of the claw pole plate 1. Then, the plane pole tooth 2 is folded to form an inclined pole tooth 3 at the tooth flipping preforming station, and the folding angle is less than 90°. This is the first folding of the claw pole plate 1. After folding, the arc shape of the root of the pole tooth 101 is formed, and because the folding angle is small and the pulling force is small, the arc will not be deformed. Finally, the inclined pole tooth 3 is further folded into a right angle at the tooth flipping station.

[0051] The distance between two adjacent stations in the gear cutting station, gear preforming station and gear turning station is equal or a multiple of each other, and there is one or more empty stations 32 between two stations with a larger distance, so that the distance between each two adjacent stations is equal, which is conducive to the mass production of the claw pole plate 1.

[0052] When the distance between two adjacent stations among the gear cutting station, gear preforming station and gear turning station is equal, the length of each feeding of the material strip 33 is the distance between the two adjacent stations. Assuming that the distance between the two adjacent stations is a, the length of each feeding of the material strip 33 is also a. At this time, there is a claw pole plate 1 on each station, thereby realizing rapid batch processing of the claw pole plates 1.

[0053] When the distances between two adjacent stations among the gear cutting station, gear flanging preforming station and gear flanging station are multiples of each other, the length of each feeding of the material strip 33 is the minimum distance between the two adjacent stations. Assuming that the distance between the gear cutting station and the gear flanging preforming station is a, and the distance between the gear flanging preforming station and the gear flanging station is 3a, there are two empty stations 32 evenly distributed between the gear flanging preforming station and the gear flanging station. The empty station 32 is a groove for accommodating pole claws on the contact end surfaces of the upper die group and the lower die group. The length of each feeding of the material strip 33 is a. After the first claw pole plate 1 is gear flanging preformed (at this time, the second claw pole plate 1 completes the gear cutting process), the material strip 33 is fed forward by a length a, the first claw pole plate 1 is located at the first empty station 32, and the second claw pole plate 1 is moved from the gear cutting station to the gear flanging preforming station, and so on. Similarly, when the distance between the gear cutting station and the gear turning preforming station is large, an empty station 32 is set between the gear cutting station and the gear turning preforming station. The empty station 32 can make way for the claw pole plate 1 on the one hand, and can also adjust the pressure center position of the mold and appropriately increase the mold template strength to reduce template deformation on the other hand.

[0054] In other optional embodiments, empty stations 32 may be set between the gear cutting station and the gear flanging preforming station, and between the gear flanging preforming station and the gear flanging station. This can ensure the strength of the mold. However, due to the large number of empty stations 32, the processing efficiency will be reduced and the mold size will be increased.

[0055] In other optional schemes, an empty station 32 can also be set at any position in the conveying direction of the material belt 33. When the empty station 32 is not in the processing position of the claw pole plate 1, the empty station 32 has the function of adjusting the pressure center position of the mold and appropriately increasing the mold template strength and reducing the deformation of the template. At this time, there is no requirement for the depth of the groove at the empty station 32 (no need to accommodate the pole claw). For the sake of distinction, the empty station 32 that only has the function of adjusting the pressure and template strength is called a pressure adjustment station.

[0056] A claw pole plate forming die for an automobile motor can continuously perform three steps of gear cutting, gear preforming and gear flipping on a claw pole plate 1, comprising an upper die set and a lower die set arranged up and down, wherein the upper die set and the lower die set are equipped with a gear cutting station, a gear flipping preforming station and a gear flipping station along the conveying direction of a material belt 33, and the three stations are arranged in an equidistant array; the gear cutting station, the gear flipping preforming station and the gear flipping station are formed by the cooperation of a convex die located in the upper die set and a concave die located in the lower die set.

[0057] like Figure 7 and Figure 8As shown, the upper die set usually includes an upper die base 4 and a stripper plate 5. The upper die base 4 is fixed on the punch press and is driven by the punch press to move up and down. The upper die base 4 and the stripper plate 5 are movably connected through an elastic reset rod; each of the punches is connected to the upper die base 4 and is suitable for passing through the stripper plate 5; the lower die set includes a lower die base 41, which is fixedly arranged; the mold is realized by a stamping process, and when the punch press moves downward, the upper die set presses the lower die set until the stripper plate 5 fits with the upper die base 4 and the lower die base 41, at which time the elastic reset rod contracts; when the punch press moves upward, the stripper plate 5 is reset under the action of the elastic reset rod, at which time the stripper plate 5 is separated from the upper die base 4 and the lower die base 41.

[0058] The elastic reset rod includes a rod body 6 and a reset spring 7. One end of the reset spring 7 is fixed to the upper die seat 4, and the other end is fixed to the rod body 6. The lower end of the rod body 6 is inserted into the stripper plate 5. When the reset spring 7 is extended or retracted, the rod body 6 can move up and down relative to the stripper plate 5. For the support of the stripper plate 5, a limiting structure can be provided at the lower part of the rod body 6, so that when the stripper plate 5 and the upper die seat 4 are separated to a certain distance, the stripper plate 5 is pulled by the limiting structure and the two cannot be separated further. A bushing 11 can also be arranged outside the rod body 6, and the upper end of the bushing 11 has an upper limit structure (i.e., a shoulder), the lower end of the bushing 11 is fixed to the unloading plate 5, and the return spring 7 is fixed to the bushing 11. When the return spring 7 is extended or retracted, the bushing 11 can be driven to move up and down relative to the upper die base 4, thereby driving the unloading plate 5 to move. The upper limit structure can prevent the bushing 11 from detaching from the upper die base 4 downward. The rod body 6 can be a bolt. In order to facilitate disassembly and assembly, the upper die base 4 can be provided with a hole that passes through from top to bottom. The rod body 6, the bushing 11 and the return spring 7 are sequentially installed into the upper die base 4 from the top, and then fixed to the upper end of the hole with a first screw plug 30. Furthermore, the bottom of the upper die seat 4 is usually fixed with an upper pad 8 and a fixed plate 9, and the top of the stripper plate 5 is also fixed with a stopper plate 10. The upper limit structure of the bushing 11 is located in the upper die seat 4 and the upper pad 8, and the main part of the bushing 11 is located in the fixed plate 9. In this way, only equal-diameter holes need to be processed on each structure, and variable-diameter holes do not need to be processed. When the stopper plate 10 is in contact with the fixed plate 9, the elastic reset rod does not extend out of the lower surface of the stripper plate 5, so that the elastic reset rod can be prevented from squeezing the material strip 33.

[0059] The lower die set is provided with a lower die plate 42, a lower pad 43 and a lower die seat 41 fixed to each other in sequence from top to bottom, so that different materials can be selected to form the lower die set according to performance requirements, and it is also convenient to assemble the parts in each concave die.

[0060] The upper die set is provided with a tooth-shaped punch 12, a preforming punch 13 and a tooth-flipping punch 14 from left to right, and the lower die set is provided with a tooth-shaped die 15, a preforming die 16 and a tooth-flipping die 17 from left to right.

[0061] The tooth-shaped punch 12 and the tooth-shaped die 15 cooperate to form a gear cutting station, such as Figure 7 As shown, the toothed punch 12 is fixed on the fixed plate 9 by the punch fixing block 18, and the lower end of the toothed punch 12 is inserted into the stop plate 10 and the stripper plate 5. The end face shape of the toothed punch 12 is the shape of the central cut-off portion of the claw pole plate 1. The lower die set has a hole directly opposite to the toothed punch 12, and the size of the hole can accommodate the central cut-off portion of the claw pole plate 1. After the teeth are cut, the cut-off portion of the material strip 33 can fall to the bottom of the hole. The toothed die 15 is an insert set in the lower die plate 42, and its end face shape is the same as the tooth shape of the claw pole plate 1. When the toothed punch 12 is pressed down, the toothed die 15 supports the claw pole plate 1, and the toothed punch 12 cuts off the inner periphery of the claw pole plate 1 and the gap between the pole claws.

[0062] The preforming convex die 13 and the preforming concave die 16 cooperate to form a preforming station for turning the gear. Figure 7 As shown, the first pin 19 is inserted from the top of the upper die seat 4, the lower part of the first pin 19 is threadedly connected with the preforming punch 13, the top end of the preforming punch 13 is against the lower surface of the upper pad 8, and the lower part of the preforming punch 13 is inserted into the stop plate 10 and the stripper plate 5. Fig.13 The structure of the preforming convex die 13 is shown in the figure. The part where the lower end of the preforming convex die 16 cooperates is approximately in the shape of a bullet head, and the outer peripheral surface is a frustum 20 with a diameter gradually increasing from bottom to top. The preforming concave die 16 is installed on the lower mold plate 42, facing the preforming convex die 13. The center of the preforming concave die 16 has a preforming hole 1601 that passes through from top to bottom. The upper surface of the preforming hole 1601 is a frustum 20 that cooperates with the preforming convex die 13. The mating surface of the preforming convex die 13 and the preforming concave die 16 is the position of the pole teeth 101 of the claw pole plate 1 after being folded. Fig.14 The structure of the preforming die 16 is shown. The upper taper angle of the preforming hole 1601 is the same as the lower taper angle of the preforming punch 13, and the uppermost diameter D1 of the preforming hole 1601 is slightly smaller than the uppermost diameter D2 of the frustum 20 in the preforming punch 13. When the preforming punch 13 is pressed against the preforming die 16, the position of D1 can be against the position of D2, so that the root folding effect of the claw plate 1 can be better. The taper angle n of the frustum 20 is preferably 60° to 70°. In this embodiment, the taper angle n of the frustum 20 is 60°, and the taper angle n of the frustum 20 is the preforming angle.

[0063] The addition of the preforming die 16 and the preforming punch 13 allows the pole tooth 101 to be preformed before turning the tooth, and the preforming angle is 60°, so that the pole tooth 101 can be pressed out with a corresponding arc (i.e., the root of the pole tooth 101) before turning the tooth, reducing the high temperature generated during mold production, and can also press the raw material of the pole tooth 101 thinner, so that the surface of the raw material of the pole tooth 101 is in a state of compressive stress, reducing the tensile stress of the subsequent tooth turning station, increasing the stability of the product after tooth turning, and improving the performance of the motor.

[0064] The gear turning punch 14 and the gear turning die 17 cooperate to form a gear turning station. Figure 7 As shown, the second pin 21 is installed from the top of the upper mold base 4, the lower part of the second pin 21 is threadedly connected to the gear-flipping punch 14, the top end of the gear-flipping punch 14 is against the lower surface of the upper pad 8, the lower part of the gear-flipping punch 14 is inserted into the stop plate 10 and the unloading plate 5, the gear-flipping die 17 is located in the lower mold plate 42, the center of the gear-flipping die 17 has a gear-flipping hole 1701 that cooperates with the gear-flipping punch 14 and is suitable for inserting the gear-flipping punch 14, and the matching surface of the gear-flipping die 17 and the gear-flipping punch 14 is a cylindrical surface with a constant diameter from bottom to top, the matching surface of the gear-flipping die 17 and the gear-flipping punch 14 is the position of the pole tooth 101 after folding, the claw pole plate 1 is placed on the upper surface of the gear-flipping die 17, and the pole tooth 101 is folded into the matching of the gear-flipping die 17 and the gear-flipping punch 14, thereby folding the pole tooth 101 at a right angle. In a further design, in order to provide a certain buffer force when the gear-flipping punch 14 is pressed down and reduce the impact of the pole teeth 101, a lower die push rod 22 and a pressure spring 23 suitable for lifting the lower die push rod 22 are provided in the gear-flipping die 17. The lower end of the gear-flipping punch 14 has a convex block 1401 suitable for passing through the claw pole plate 1. When the upper die set presses the lower die set, the lower die push rod 22 abuts against the convex block 1401. When the gear-flipping punch 14 moves downward to the gear-flipping die 17, the convex block 1401 first contacts the lower die push rod 22. Since the bottom of the lower die push rod 22 is provided with a pressure spring 23, the pressure of the lower die push rod 22 on the gear-flipping punch 14 gradually increases, and the downward pressing speed of the gear-flipping punch 14 slows down, thereby reducing the stress impact when the pole teeth 101 are folded. In addition, when the punch press moves upward, the elastic force of the pressure spring 23 can also provide the upper die set with rising and resetting power.

[0065] In order to better implement the mold described in the present invention, a guide pin 24 can also be fixed on the unloading plate 5. When the punch press moves downward, the guide pin 24 is pressed into the guide hole 3301 of the material strip 33, and the material strip 33 is guided by the guide pin 24.

[0066] In order to ensure the accuracy of the linearity of the upper die set when pressing downward, the upper die set can also be provided with an inner guide post 25, and the lower die set is provided with a guide hole 26 that cooperates with the inner guide post 25, such as Figure 7 As shown, the upper end of the inner guide pin 25 is fixed on the fixed plate 9, and the lower part of the inner guide pin 25 is inserted into the stop plate 10 and the unloading plate 5. The inner guide sleeve 27 can be set on the unloading plate 5 and the lower template 42. The inner guide pin 25 slides with the inner guide sleeve 27 when moving up and down, which is convenient for replacing parts. When the upper mold assembly is pressed down, the inner guide pin 25 first enters the guide hole 26, which plays a guiding role in the downward stroke of the upper mold assembly.

[0067] In a further design, the lower die set has a floating pin 28 suitable for lifting the material strip 33. The floating pin 28 is elastically connected to the lower die base 41. When the upper die set is separated from the lower die set, the floating pin 28 can lift the material strip 33 and separate it from the lower die set, so that the flipped claw plate 1 is lifted above the lower die set, which facilitates the material strip 33 to continue to be transported forward. Figure 7 As shown, the floating pin 28 is slidably set in the lower mold plate 42 and the lower pad 43. The diameter of the floating pin 28 in the lower pad 43 is relatively large, which can play an upward limit role. A floating spring 29 is set below the floating pin 28, and its installation method can be the same as the reset spring 7, that is, after being installed from the bottom of the lower mold base 41, the end of the floating spring 29 is blocked by the second screw plug 31.

[0068] A method for forming a claw pole plate 1 of an automobile motor, the method using the above-mentioned automobile motor claw pole plate forming mold, comprising the following steps:

[0069] S1: tooth cutting, the material strip 33 is conveyed to the tooth cutting station, and tooth-shaped cutting is performed on the material strip 33 so that the inner periphery of the claw pole plate 1 forms a planar pole tooth 2 .

[0070] S2: Gear pre-forming, the material strip 33 is continuously conveyed until the claw pole plate 1 in S1 reaches the gear pre-forming station, and the flat pole teeth 2 are folded for the first time to form inclined pole teeth 3.

[0071] S3: Gear turning, continue to convey the material belt 33 until the claw pole plate 1 in S2 reaches the gear turning station, and continue to turn the inclined pole teeth 3 to a right angle.

[0072] In this embodiment, a punching station can also be set behind the gear cutting station (in the opposite direction of the conveying direction of the material belt 33) to punch the small holes 102 on the panel of the claw plate 1. The punching station, gear cutting station, gear preforming station and gear turning station are arranged in an equidistant array, and a pressure regulating station can also be set between any two adjacent stations. The gear cutting station is formed by the cooperation of the round hole punch 34 located in the upper die group and the round hole die 35 located in the lower die group. Figure 7 As shown, the round hole punch 34 is fixed on the fixed plate 9, the lower end of the round hole punch 34 is inserted into the stop plate 10 and the unloading plate 5, the round hole die 35 is fixed on the upper template, and the round hole punch 34 can be inserted into the center of the round hole die 35 after being pressed down, and the lower die set passes through the center of the round hole die 35 from top to bottom, and the waste material after punching can fall down.

[0073] The specific working process is as follows: the material belt 33 is accurately sent to the designated workstation by the feeder. During the downward movement of the punch press, the material belt 33 is guided by the guide pin 24. The lower surface of the stripper plate 5 first contacts the upper surface of the material belt 33, and the material belt 33 is driven downward by the floating pin 28. When the material belt 33 contacts the lower template 42, the stripper plate 5 stops moving, the upper die seat 4, the upper pad 8 and the fixed plate 9 continue to move downward, the reset spring 7 is compressed, the round hole punch 34, the toothed punch 12, the preforming punch 13 and the tooth-flipping punch 14 all move downward to the bottom of the stripper plate 5 and cooperate with the corresponding concave die to complete the punching and forming. The die reaches the lower dead center position, and the downward movement process of the punch press ends (such as Figure 8 As the mold moves upward, the unloading plate 5 is ejected by the reset spring 7, and the material belt 33 is separated from the unloading plate 5 by the floating pin 28. The floating pin 28 lifts the material belt 33 upward, and the upper mold base 4, the upper pad 8 and the fixed plate 9 continue to move upward and return to the top dead center (as shown in FIG. Figure 7 To complete a stamping process.

[0074] Embodiment 2

[0075] On the basis of the first embodiment, the present embodiment sets a blanking station in front of the gear flanging station, and the blanking station is used to separate the claw pole plate 1 formed by the gear flanging from the material strip 33. The blanking station is formed by the blanking punch 36 located in the upper die group and the blanking die 37 located in the lower die group. The blanking punch 36 is fixed to the upper die seat 4, the upper pad 8 and the fixed plate 9 by the threaded cooperation with the third pin 38 and the limiting of the shaft shoulder. The blanking die 37 is arranged in the lower die plate 42. The end face shape of the blanking punch 36 is the same as the outer edge shape of the claw pole plate 1, which is used to press and separate the claw pole plate 1 from the material strip 33. The center of the blanking die 37 has a through hole suitable for accommodating the claw pole plate 1. The claw pole plate 1 formed by the gear flanging can fall from the center of the blanking die 37 to the bottom of the lower die group.

[0076] In this embodiment, a punching station, a gear cutting station, a gear preforming station, a gear turning station and a blanking station are sequentially arranged in the horizontal direction, so as to complete the entire blanking process from the raw material of the material strip 33 to the claw pole plate 1, and can realize high-speed (350SPM) continuous automatic production of claw poles, improve production efficiency, and reduce the production cost of a single claw pole plate 1. The addition of the gear turning preforming station improves the processing accuracy and ensures the qualified rate of the pole teeth 101.

[0077] Since the mold is long, in order to increase the strength of the mold, an empty station 32 (such as Figure 8As shown), the distance between the gear flanging station and the blanking station in this embodiment is relatively large, and the empty station 32 not only has the function of increasing the strength of the mold, but also has the function of accommodating the pole claws. In an optional embodiment, the punching station, gear cutting station, gear flanging preforming station, gear flanging station and blanking station can also be arranged in an equidistant array, and the empty station 32 is a pressure regulating station.

[0078] The method for forming the claw pole plate 1 of an automobile motor using the mold comprises the following steps:

[0079] S1: tooth cutting, the material strip 33 is conveyed to the tooth cutting station, and tooth-shaped cutting is performed on the material strip 33 so that the inner periphery of the claw pole plate 1 forms a planar pole tooth 2 .

[0080] S2: Gear pre-forming, the material strip 33 is continuously conveyed until the claw pole plate 1 in step S1 reaches the gear pre-forming station, and the planar pole teeth 2 are folded for the first time to form inclined pole teeth 3.

[0081] S3: Flipping the teeth, continue to convey the material belt 33 until the claw pole plate 1 in step S2 reaches the tooth flipping station, and continue to fold the inclined pole teeth 3 to a right angle.

[0082] S4: blanking, the material belt 33 is continuously conveyed until the claw pole plate 1 in step S3 reaches the blanking station, and the claw pole plate 1 with the teeth turned and formed is separated from the material belt 33.

[0083] Embodiment 3

[0084] On the basis of Example 1 or Example 2, this embodiment adds a deburring station between the tooth cutting station and the tooth flanging preforming station to remove burrs on the edge of the planar pole teeth 2. The deburring station has a deburring component 3902 protruding from the surface of the lower mold group. The surface shape of the deburring component 3902 is the same as the inner peripheral hole shape of the claw pole plate 1 after the planar pole teeth 2 are formed, so that the planar pole teeth 2 and the deburring component 3902 are engaged with each other.

[0085] In the prior art, the method for removing burrs on the pole teeth 101 is to set up a separate deburring device to remove the burrs on the pole teeth 101 after all processes are completed. In this way, the process of making the pole teeth 101 is simple, but it is necessary to add additional deburring equipment for the pole teeth 101, which is costly and adds a separate process, resulting in a waste of manpower; and after the pole teeth 101 are formed, the burrs are removed again, because the tooth shape of the pole teeth 101 is irregular, the burrs are not completely removed, thereby increasing the risk of short circuit of the motor during use; the present invention sets a deburring process after the tooth cutting process and before the preforming process. At this time, the pole teeth 101 are in a horizontal plane state, and the burrs on the pole teeth 101 are in the vertical and horizontal directions of the pole teeth 101, so the burrs are more convenient and complete to remove.

[0086] like Figure 7 As shown, the lower mold plate 42 is provided with a deburring insert 39, and the deburring component 3902 is located on the top of the deburring insert 39. Fig. 9 and Fig.10 The figure shows a schematic diagram of the added deburring insert 39, the deburring component 3902 forms a pole tooth snap-in gap 40, and the edge deburring is achieved after the pole tooth 101 is snap-fitted into the pole tooth snap-in gap 40. The deburring component 3902 allows the pole tooth 101 to be deburred before turning the tooth, so that the burrs of the pole tooth 101 after stamping can be removed in the mold, reducing short-circuit burning caused by the burr shedding in the later stage, and improving the service life of the motor.

[0087] Preferably, the edges of the upper and lower end faces of the deburring component 3902 are both provided with chamfers 3901. The surface of the stripping plate 5 facing the deburring insert 39 is a plane. During the downward pressing process of the upper mold assembly, when the pole tooth 101 enters the pole tooth insertion gap 40 as shown in the figure, the chamfer 3901 on the deburring component 3902 is used to press the burrs on the pole tooth 101 and the material strip 33 into one body, forming a rounded corner or squeezing the burrs off. The entire deburring structure is simple, and the burrs on the pole tooth 101 can be completely removed. No separate deburring equipment is required, and the burr removal can be completed directly in the pole tooth 101 manufacturing mold, thereby reducing costs. Fig.11 and Fig.12 The figure shows a comparison of the pole teeth before and after deburring. Before deburring, the end surface edge of the pole tooth 101 has protruding burrs, and after deburring, the end surface edge of the pole tooth 101 is relatively smooth and flat.

[0088] Preferably, the height d of the deburring component 3902 is less than the thickness of the material strip 33. There is no special regulation on the size of the chamfer 3901 of the deburring component 3902, which is about 1 / 6 to 1 / 4 of the thickness of the material strip 33, depending on the actual use effect.

[0089] The method for forming the claw pole plate 1 of an automobile motor using the mold comprises the following steps:

[0090] S1: tooth cutting, the material strip 33 is conveyed to the tooth cutting station, and tooth-shaped cutting is performed on the material strip 33 so that the inner periphery of the claw pole plate 1 forms a planar pole tooth 2 .

[0091] S2: Deburring, continue conveying the material belt 33 until the claw pole plate 1 in step S1 reaches the deburring station, and remove the burrs on the surface of the planar pole teeth 2. Before the pre-forming of the teeth, the pole teeth are in a plane, and the deburring is relatively simple and the removal is relatively complete.

[0092] S3: Gear pre-forming, the material strip 33 is continuously conveyed until the claw pole plate 1 in step S2 reaches the gear pre-forming station, and the planar pole teeth 2 are folded for the first time to form inclined pole teeth 3.

[0093] S4: Flipping the teeth, continue to convey the material belt 33 until the claw pole plate 1 in step S3 reaches the tooth flipping station, and continue to fold the inclined pole teeth 3 to a right angle.

[0094] S5: blanking, the material belt 33 is continuously conveyed until the claw pole plate 1 in step S4 reaches the blanking station, and the claw pole plate 1 with the teeth turned and formed is separated from the material belt 33.

[0095] Embodiment 4

[0096] On the basis of the above embodiment, this embodiment further provides a tooth adjustment station in front of the tooth turning station for adjusting the verticality of the pole teeth 101. At the tooth adjustment station, a tooth adjustment block 45 is provided in the lower template 42, and the top of the tooth adjustment block 45 is suitable for placing the claw pole plate 1 after tooth turning, and the surface of the stripper plate 5 corresponding to the tooth adjustment block 45 is a plane. The setting of the tooth adjustment station can further improve the processing accuracy of each process and ensure the qualified rate of the pole teeth 101.

[0097] like Fig.15 As shown, the method for forming the claw pole plate 1 of an automobile motor using the mold includes the following steps:

[0098] S1: tooth cutting, the material strip 33 is conveyed to the tooth cutting station, and tooth-shaped cutting is performed on the material strip 33 so that the inner periphery of the claw pole plate 1 forms a planar pole tooth 2 .

[0099] S2: Deburring, the material belt 33 is continuously conveyed until the claw pole plate 1 in step S1 reaches the deburring station, and the burrs on the surface of the planar pole teeth 2 are removed.

[0100] S3: Gear pre-forming, the material strip 33 is continuously conveyed until the claw pole plate 1 in step S2 reaches the gear pre-forming station, and the planar pole teeth 2 are folded for the first time to form inclined pole teeth 3.

[0101] S4: Flipping the teeth, continue to convey the material belt 33 until the claw pole plate 1 in step S3 reaches the tooth flipping station, and continue to fold the inclined pole teeth 3 to a right angle.

[0102] S5: teeth adjustment, the material belt 33 is continuously conveyed until the claw pole plate 1 in step S4 reaches the teeth adjustment station, and the verticality of the pole teeth 101 is adjusted.

[0103] S6: blanking, the material belt 33 is continuously conveyed until the claw pole plate 1 in step S5 reaches the blanking station, and the claw pole plate 1 with the teeth turned and formed is separated from the material belt 33.

[0104] In the description of the present invention, it is necessary to understand that the terms "center", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0105] Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0106] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0107] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A claw plate forming die for an automobile motor, characterized in that: The method comprises an upper die set and a lower die set arranged in a vertical direction, wherein the upper die set and the lower die set are provided with a gear cutting station, a gear turning preforming station and a gear turning station along the conveying direction of the material belt (33); the gear cutting station, the gear turning preforming station and the gear turning station are formed by the cooperation of a convex die located in the upper die set and a concave die located in the lower die set; The tooth cutting station is suitable for cutting a tooth shape on the claw pole plate (1) of the material strip (33) so that the inner periphery of the claw pole plate (1) forms a planar pole tooth (2); the tooth flipping preforming station is suitable for folding the planar pole tooth (2) to form an inclined pole tooth (3), and the folding angle is less than 90°; the tooth flipping station is suitable for further folding the inclined pole tooth (3) to form a right angle; It also includes a deburring station located between the tooth cutting station and the tooth preforming station, the deburring station having a deburring component (3902) protruding from the surface of the lower mold assembly, the surface shape of the deburring component (3902) being the same as the inner peripheral hole shape of the claw pole plate (1) after the planar pole teeth (2) are formed, so that the planar pole teeth (2) and the deburring component (3902) are mutually engaged; The tooth-flashing preforming station comprises a preforming convex mold (13) and a preforming concave mold (16) that cooperate with each other, the preforming concave mold (16) being located at the top of the lower mold group, the preforming convex mold (13) extending from the upper mold group to the preforming concave mold (16), the preforming convex mold (13) and the preforming concave mold (16) having mutually cooperating frustum surfaces (20) with diameters gradually increasing from bottom to top, the center of the preforming concave mold (16) having a preforming hole (1601) that passes through from top to bottom, the uppermost diameter D1 of the preforming hole (1601) being slightly smaller than the uppermost diameter D2 of the frustum surface (20) in the preforming convex mold (13), and when the preforming convex mold (13) is pressed against the preforming concave mold (16), the uppermost position of the preforming hole (1601) can abut against the uppermost position of the frustum surface (20).

2. The automotive motor claw plate forming mold according to claim 1, characterized in that: The gear turning station comprises a gear turning punch (14) and a gear turning die (17) which cooperate with each other, the gear turning die (17) being located at the top of the lower die set, the gear turning punch (14) extending from the upper die set to the gear turning die (17), and the gear turning die (17) and the gear turning punch (14) having mutually cooperating cylindrical surfaces with a constant diameter from bottom to top.

3. The automotive motor claw plate forming mold according to claim 1, characterized in that: The distance between two adjacent workstations among the gear cutting workstation, gear turning preforming workstation and gear turning workstation is equal or a multiple of each other, and there is one or more empty workstations (32) between two workstations with a larger distance, so that the distance between each two adjacent workstations is equal.

4. The automotive motor claw plate forming mold according to claim 1, characterized in that: The gear cutting station comprises a tooth-shaped convex die (12) and a tooth-shaped concave die (15) which cooperate with each other, the tooth-shaped concave die (15) being located at the top of the lower die set, the tooth-shaped convex die (12) extending from the upper die set to the tooth-shaped concave die (15), and the end face shape of the tooth-shaped concave die (15) being the same as the tooth shape of the claw pole plate (1).

5. The automotive motor claw plate forming mold according to claim 1, characterized in that: It also includes a blanking station located in front of the gear turning station, the blanking station is formed by the cooperation of a blanking punch (36) located in the upper die group and a blanking die (37) located in the lower die group, the blanking die (37) is suitable for accommodating the claw pole plate (1), and the end face shape of the blanking punch (36) is the same as the outer edge shape of the claw pole plate (1).

6. The automotive motor claw plate forming mold according to claim 1, characterized in that: The edges of the upper end face and the lower end face of the deburring component (3902) are both provided with chamfers (3901).

7. The automotive motor claw plate forming mold according to claim 1, characterized in that: The height d of the deburring component (3902) is smaller than the thickness of the material strip (33).

8. The automotive motor claw plate forming mold according to claim 1, characterized in that: The cone angle n of the frustum surface (20) is between 60° and 70°.

9. The automotive motor claw plate forming mold according to any one of claims 1 to 8, characterized in that: The upper die assembly comprises an upper die base (4) and a stripper plate (5), wherein the upper die base (4) and the stripper plate (5) are movably connected via an elastic reset rod; each of the punches is connected to the upper die base (4) and is suitable for passing through the stripper plate (5); the lower die assembly comprises a lower die base (41); When the punch press moves downward, the upper die set presses the lower die set until the stripper plate (5) fits the upper die seat (4) and the lower die seat, at which time the elastic reset rod contracts; when the punch press moves upward, the stripper plate (5) is reset under the action of the elastic reset rod, at which time the stripper plate (5) is separated from the upper die seat (4) and the lower die seat (41).

10. The automotive motor claw plate forming mold according to claim 2, characterized in that: The tooth turning die (17) is provided with a lower die push rod (22) and a pressure spring (23) suitable for lifting the lower die push rod (22). The lower end of the tooth turning die (14) has a convex block (1401) suitable for passing through the claw pole plate (1). When the upper die group is pressed against the lower die group, the lower die push rod (22) abuts against the convex block (1401).

11. The automotive motor claw plate forming mold according to claim 9, characterized in that: The lower die assembly has a floating pin (28) suitable for lifting the material strip (33), and the floating pin (28) is elastically connected to the lower die seat (41).

12. A method for forming a claw pole plate of an automobile motor, characterized in that: The method adopts the automotive motor claw pole plate forming mold according to any one of claims 1 to 11, and comprises the following steps: S1: tooth cutting, conveying the material strip (33) to the tooth cutting station, performing tooth cutting on the material strip (33), so that the inner periphery of the claw pole plate (1) forms a planar pole tooth (2); S2: pre-forming the teeth, the material strip (33) is continuously conveyed until the claw pole plate (1) in step S1 reaches the pre-forming station for turning the teeth, and the planar pole teeth (2) are turned over for the first time to form inclined pole teeth (3); S3: Flipping the teeth, continuing to convey the material belt (33) until the claw pole plate (1) in step S2 reaches the tooth flipping station, and continuing to fold the inclined pole teeth (3) to a right angle.

13. The method for forming claw pole plates of automobile motors according to claim 12, characterized in that: After the tooth cutting in step S1 is completed, the surface of the claw pole plate (1) is first deburred, and then the tooth preforming in step 2 is performed; the claw pole plate (1) in step S1 is sent to the deburring station to remove the burrs on the surface of the planar pole teeth (2).

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