Rotor sheet round-point flat-buckling laminated riveting structure die

Abstract

The utility model discloses a rotor sheet dot flat buckle lamination riveting structure die, which comprises an upper die and a lower die, a lamination riveting buckle point station and a blanking station are arranged between the upper die and the lower die, the lamination riveting buckle point station is arranged in front of the blanking station, and the lamination riveting buckle point station comprises a buckle point pressure head and a center hole punch which are arranged on the upper die. The end of the buckling point pressing head is cylindrical, the blanking station comprises a blanking punch connected to the upper die and a blanking die cavity installed on the lower die, the size of an opening of the blanking die cavity is matched with that of the blanking punch, the size of an inner hole of the blanking die cavity is smaller than that of an outer circle of a rotor piece, and the height of the blanking die cavity is larger than that of a rotor iron core. The blanking die cavity is arranged in the rotary bottom die, the rotary bottom die is driven by a motor and rotates in an indexing mode, and the rotary bottom die drives the blanking die cavity to rotate by 90 degrees every time the blanking punch punches. And in the mutual flat buckling and overlapping riveting process of the circular buckling points, the fitting is tighter and smoother, the used flat buckling pressing force is small, and meanwhile, the balance degree of the formed iron core is remarkably improved.

Description

Technical Field

[0001] The utility model relates to a continuous die, in particular to a rotor sheet round point flat buckle overlap riveting structure die. Background Art

[0002] The rotor is formed by riveting rotor sheets layer by layer. The existing rotor sheets have square buckle points. There are multiple square buckle points that are evenly distributed around the circumference. The square buckle points are similar to square-shaped grooves and need to be stamped in a continuous die. In this way, the rotor sheets are fitted and self-fastened one by one through the square buckle points. The current problem is that during the forming process of the square buckle points, the end of the pressure head formed by the continuous die stamping of the rotor sheet buckle points is also square. The stamping process makes it impossible to eliminate the stress of the rotor sheets. The rotor sheets are uneven and have a large deformation after stamping, and the force for buckling the rotor sheets to each other needs to be very large and not tight. After the rotating shaft is inserted into the center hole of the rotor sheet, an iron core is formed. Such an iron core has an unbalance of about 2000 mg and is easy to loosen, resulting in poor balance. This causes the rotor to be unbalanced and noisy during rotation. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide a rotor sheet dot flat buckle riveting structure mold which can make the rotor sheet have small stamping deformation and good balance, so that the produced rotor sheet has better balance after being buckled into an iron core.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotor sheet round point flat buckle stack riveting structure mold, comprising an upper mold and a lower mold, a stack riveting point station and a blanking station are arranged between the upper mold and the lower mold, the stack riveting point station is arranged in front of the blanking station, the stack riveting point station comprises a buckle point pressure head and a center hole punch installed in the upper mold, the end of the buckle point pressure head is cylindrical, so that a circular flat buckle point can be punched on the rotor sheet, the blanking station comprises a blanking punch connected to the upper mold and a blanking die cavity installed in the lower mold, the blanking punch and the blanking die cavity correspond to each other up and down, the opening size of the blanking die cavity matches the blanking punch, the inner hole size of the blanking die cavity is smaller than the outer circle size of the rotor sheet, the height of the blanking die cavity is greater than the height of the rotor core, the blanking die cavity is arranged in a rotary bottom mold, the rotary bottom mold is driven by a motor and is arranged to rotate in a graduated manner, and the rotary bottom mold drives the blanking die cavity to rotate 90 degrees each time the blanking punch punch punches once.

[0005] A blade slot punch and a metering punch are also provided on the upper die. The blade slot punch and the metering punch are sequentially arranged in front of the overlapping riveting point station. The blade slot punch is used for forming the slot holes of the rotor blades, and the metering punch is independently controlled.

[0006] The lower mold is provided with a groove mounted with the rotary bottom mold, a bearing is arranged between the rotary bottom mold and the groove, and a synchronous wheel is provided at the bottom of the rotary bottom mold, and the synchronous wheel is connected to the motor transmission.

[0007] The beneficial effects of the utility model are as follows: since the end of the buckle point pressure head is cylindrical, the buckle point can be formed into a circle. Compared with the prior art, the stamping forming of the circular buckle point is more balanced in force on the rotor sheet, with smaller stress and less chance of deformation of the rotor sheet, and has good flatness. The edge of the circular groove is more balanced and smooth. During the process of flat buckling and riveting, the circular buckle points are more tightly and smoothly fitted and the flat buckle pressure used is small. At the same time, the balance of the formed iron core is significantly improved.

[0008] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of a specific implementation method of the utility model;

[0010] Figure 2 This is a diagram of the forming process of the rotor sheet in a specific implementation manner of the utility model;

[0011] Figure 3 This is a structural diagram of the rotor sheet stacking riveting points in a specific implementation mode of the utility model;

[0012] Figure 4 It is a structural diagram of the rotor sheet in a specific implementation manner of the utility model. DETAILED DESCRIPTION

[0013] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0014] like Figure 1 — Figure 4As shown, the present embodiment discloses a rotor sheet round point flat buckle stack riveting structure die, which belongs to a continuous die, and its structure includes an upper die 1 and a lower die 2. The iron plate for making the rotor sheet is conveyed stepwise between the upper die 1 and the lower die 2. A blade slot punch 3, a metering punch 4, a stack riveting point station 5 and a blanking station 6 are sequentially arranged between the upper die 1 and the lower die 2. The blade slot punch 3 and the metering punch 4 are sequentially arranged in front of the stack riveting point station 5. The blade slot punch 3 is used for forming the slot holes of the rotor blades. The metering punch 4 is independently controlled to punch metering holes on the rotor sheet. The stack riveting point station 5 is arranged in front of the blanking station 6. The stack riveting point station 5 includes a buckle point pressure head 51 installed on the upper die 1 and a center hole The punch 52, the end of the buckle point press head 51 is cylindrical, so that a circular flat buckle point can be punched on the rotor sheet. The blanking station 6 includes a blanking punch 61 connected to the upper die 1 and a blanking die cavity 62 installed on the lower die 2. The blanking punch 61 and the blanking die cavity 62 correspond to each other up and down. The opening size of the blanking die cavity 62 matches the punch of the blanking punch 61. The inner hole size of the blanking die cavity 62 is smaller than the outer circle size of the rotor sheet 100. The height of the blanking die cavity 62 is greater than the height of the rotor core. The blanking die cavity 62 is arranged in a rotary bottom die 63. The rotary bottom die 63 is driven by a motor and is arranged to rotate in a graduated manner. Every time the blanking punch 61 punches once, the rotary bottom die 63 drives the blanking die cavity 62 to rotate 90 degrees.

[0015] Among them, the lower mold 2 is provided with a groove for installing the rotary bottom mold 63, a bearing 7 is arranged between the rotary bottom mold 63 and the groove, and a synchronous wheel 8 is provided at the bottom of the rotary bottom mold 63. The synchronous wheel 8 is connected to the motor transmission, so that the rotation of the rotary bottom mold 63 can be smoother and the precision is better.

[0016] The working principle of the continuous die is as follows: the iron plate 10 for making the rotor sheet 100 is conveyed in steps. On the stepping conveying path, the blade slot punch 3, the buckle point press 51 and the blanking punch 61 act N times each time, and the metering punch 4 acts once; the blade slot punch 3 punches out the blade slot 20 on the iron plate, the blade slot punch 3 punches out the metering hole 30 on the iron plate, and the buckle point press 51 punches out the circular buckle point 40 (overlap rivet point) and the center axis hole 50 on the iron plate (the punching position of the circular buckle point is the same as the punching position of the metering hole (when the metering hole 30 already exists on the iron plate, the buckle point press 51 cannot punch out the overlap rivet point at the metering hole position), the blanking punch 61 causes the rotor sheet to be dropped into the blanking die cavity 62 and overlap-riveted with the previous rotor sheet in the blanking die cavity 62. Each time the blanking punch 61 punches once, the blanking die cavity 62 rotates 90 degrees. In this way, the final rotor core product comes out from the bottom of the blanking die cavity 62, completing the fully automatic production of the rotor core, greatly improving production efficiency. In addition, during the stacking and riveting process of the blanking die cavity 62, the upper and lower rotor sheets are staggered 90 degrees from each other during stacking and riveting, so that the concentricity error between the central axis hole and the outer circle of the rotor sheet is not in the same direction, but in four different directions of the 360-degree circumference. At the same time, the influence of factors caused by uneven material thickness and uneven burrs is also distributed in four different directions, so the finished rotor core will be very stable during dynamic balancing test.

[0017] By adopting the above technical scheme, since the end of the buckle point pressure head 51 is cylindrical, the buckle point can be formed into a circle. Compared with the prior art, the stamping forming of the circular buckle point (also called the circular buckle point) is more balanced in force on the rotor sheet than the stamping forming of the square buckle point (the original square buckle point has four corners, and the four corners will generate greater stress when stamped on the iron plate, causing the iron plate to deform). The stress is small and it is not easy to deform the rotor sheet, the flatness is good, the edge of the circular groove is more balanced and flat, and the circular buckle points are more tightly and flatly fitted during the process of mutual flat buckling and riveting, and the flat buckle pressure used is small, the compactness is good, and at the same time, the balance of the formed iron core is significantly improved.

[0018] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0019] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rotor sheet dot flat buckle stack riveting structure mold, comprising an upper mold and a lower mold, characterized in that: A stacking riveting point station and a blanking station are arranged between the upper die and the lower die. The stacking riveting point station is arranged in front of the blanking station. The stacking riveting point station includes a point pressing head and a center hole punch installed on the upper die. The end of the point pressing head is cylindrical. The blanking station includes a blanking punch connected to the upper die and a blanking die cavity installed on the lower die. The blanking punch and the blanking die cavity correspond to each other up and down. The opening size of the blanking die cavity matches the blanking punch. The inner hole size of the blanking die cavity is smaller than the outer circle size of the rotor sheet. The height of the blanking die cavity is greater than the height of the rotor core. The blanking die cavity is arranged in a rotary bottom die. The rotary bottom die is driven by a motor and is arranged to rotate in a graduated manner. Every time the blanking punch punch punches, the rotary bottom die drives the blanking die cavity to rotate 90 degrees.

2. The rotor sheet dot flat buckle rivet structure mold according to claim 1, characterized in that: A blade slot punch and a metering punch are also provided on the upper die. The blade slot punch and the metering punch are sequentially arranged in front of the overlapping riveting point station. The blade slot punch is used for forming the slot holes of the rotor blades, and the metering punch is independently controlled.

3. The rotor sheet round dot flat buckle overlap riveting structure mold according to claim 1, characterized in that: The lower mold is provided with a groove mounted with the rotary bottom mold, a bearing is arranged between the rotary bottom mold and the groove, and a synchronous wheel is provided at the bottom of the rotary bottom mold, and the synchronous wheel is connected to the motor transmission.

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