Ferromagnetic shoe forming chamfering die

Abstract

The utility model discloses a ferromagnetic shoe forming chamfering die, which relates to the field of magnetic shoe forming dies, and comprises an upper die, and a forming chamfer is arranged on the arc surface of the bottom surface of the upper die; the arc surface of the top surface of the middle mold is provided with a shape matched with that of the arc surface of the bottom surface of the upper mold, the middle mold is further provided with a mold cavity vertically penetrating through the middle mold, and the middle mold is further provided with a material injection opening; a feeding groove is formed in the top of the material distributing plate; one end of the injection port is communicated to a feeding groove in the material distributing plate, and the other end of the injection port is communicated into a mold cavity of the middle mold; an upward protruding chamfer is arranged on the cambered surface of the top face of the lower punch, and a required chamfer is reserved on the green body after forming; the top of the lower punch penetrates into the die cavity of the middle die from the bottom of the die cavity of the middle die, the bottom surface of the upper die covers the top surface of the middle die, and a magnetic tile green body is formed by the bottom cambered surface of the upper die, the top cambered surface of the lower punch and the space in the die cavity of the middle die; the subsequent grinding and chamfering process can be omitted, the installation resistance is reduced through smooth transition of the chamfer, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of magnetic tile forming dies, in particular to a ferromagnetic tile forming chamfering die. Background Art

[0002] Magnetic tiles are mainly used in permanent magnet DC motors. Unlike electromagnetic motors that generate magnetic potential sources through excitation coils, permanent magnet motors use permanent magnetic materials to generate constant magnetic potential sources. Permanent magnetic tiles instead of electric excitation have many advantages, which can make the motor simple in structure, easy to maintain, light in weight, small in size, reliable in use, less copper, low copper consumption, and low energy consumption.

[0003] At present, the finished chamfers of some motor magnet products are basically carried out by subsequent grinding. The chamfer shape is a flat angle at a certain angle, and there are edges and corners at the intersection with the arc surface of the magnet. When installing the retaining spring, the resistance is large and it is easy to cause corners and pieces to fall off, affecting production efficiency and product authenticity.

[0004] To this end, the utility model provides a ferromagnetic tile forming chamfering die. Utility Model Content

[0005] The technical problem solved by the utility model is that at present, the finished chamfering of some motor magnetic shoe products is basically carried out by subsequent grinding. The chamfer shape is a flat angle of a certain angle, and there are edges and corners at the intersection with the arc surface of the magnetic shoe. When installing the retaining spring, the resistance is large and it is easy to cause the corners to fall off and the pieces to fall off, which affects the production efficiency and the product authenticity rate.

[0006] The utility model can be implemented by the following technical scheme: a ferromagnetic tile forming chamfering die, comprising an upper die, and a forming chamfer is arranged on the arc surface of the bottom surface of the upper die;

[0007] A middle mold, wherein the top arc surface of the middle mold is provided with a shape matching the bottom arc surface of the upper mold, the middle mold is also provided with a mold cavity vertically penetrating the middle mold, and the middle mold is also provided with a material injection port;

[0008] A material distribution plate, wherein a feed groove is arranged on the top of the material distribution plate; one end of the injection port is connected to the feed groove on the material distribution plate, and the other end is connected to the mold cavity of the middle mold;

[0009] A lower punch, wherein the top arc surface of the lower punch is provided with an upwardly protruding chamfer, and a desired chamfer will be left on the green body after forming;

[0010] A lower punch fixing plate, which is used to fix the lower punch;

[0011] The top of the lower punch penetrates into the mold cavity of the middle mold from the bottom of the mold cavity of the middle mold, and the bottom surface of the upper mold covers the top surface of the middle mold. The magnetic tile green body is formed by the bottom arc surface of the upper mold, the top arc surface of the lower punch and the space in the mold cavity of the middle mold.

[0012] A further technical improvement of the utility model is that water absorption grooves are arranged on both sides of the arc surface of the bottom surface of the upper mold.

[0013] A further technical improvement of the utility model is that a plurality of water absorption holes are provided on both sides of the arc surface of the bottom surface of the upper mold.

[0014] A further technical improvement of the utility model is that the top arc surface of the lower punch is used to form the inner arc of the magnetic tile green body.

[0015] A further technical improvement of the utility model is that the bottom arc surface of the upper mold corresponds to the position of the middle mold cavity and is used to form the outer arc of the magnetic tile green body.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In the utility model, the space synthesized by the bottom arc surface of the upper die, the top arc surface of the lower punch and the middle die cavity is used to form the magnetic tile green body; the arc surface of the top surface of the lower punch is used to form the inner arc of the magnetic tile green body; the arc surface of the bottom surface of the upper die corresponds to the position of the middle die cavity and is used to form the outer arc of the magnetic tile green body; after the magnetic tile is ground into a finished product, the remaining chamfer matches the required chamfer size, and the subsequent grinding and chamfering process can be omitted; and the smooth transition of the chamfer is used to reduce the installation resistance and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is the structural explosion diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the bottom surface structure of the upper mold of the utility model;

[0021] Figure 3 For this utility model Figure 2 A partial enlarged view of the middle A area;

[0022] Figure 4 This is a schematic diagram of the middle mold structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the injection port of the middle mold of the utility model;

[0024] Figure 6 It is a schematic diagram of the bottom structure of the middle mold of the utility model;

[0025] Figure 7 This is a schematic diagram of the top surface structure of the dividing plate in the utility model;

[0026] Figure 8 It is a schematic diagram of the lower punch structure of the utility model;

[0027] Fig. 9 This is a schematic diagram of the assembly and mold-matching of the utility model;

[0028] Fig.10 This is a schematic diagram of the magnetic tile product.

[0029] In the figure: 1. upper die; 11. forming chamfer; 12. water absorption hole; 13. water absorption groove; 2. middle die; 21. injection port; 3. dividing plate; 31. feeding trough; 4. lower punch; 41. upward raised chamfer; 5. lower punch fixing plate. DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0031] See also Figure 1-Figure 10 As shown, a ferromagnetic tile forming chamfering mold includes an upper mold 1, a middle mold 2, a dividing plate 3, a lower punch 4 and a lower punch fixing plate 5.

[0032] A forming chamfer 11 is provided on the arc surface of the middle forming area of ​​the bottom surface of the upper mold 1 , and a water absorption groove 13 and a plurality of water absorption holes 12 are provided on both sides of the arc surface of the bottom surface of the upper mold 1 .

[0033] The middle molding area on the top surface of the middle mold 2 is provided with a shape matching the arc surface of the bottom surface of the upper mold. A mold cavity vertically penetrating the middle mold 2 is also formed in the middle of the middle mold 2. An injection port 21 is provided on the middle mold 2. One end of the injection port 21 is connected to the feed groove 31 on the material dividing plate 3 at the bottom of the middle mold 2, and the other end is connected to the mold cavity of the middle mold 2.

[0034] The top molding surface of the lower punch 4 has an upwardly protruding chamfer 41, and the upwardly protruding chamfer 41 is designed with a shrinkage amount according to product requirements, and can be designed to be a smooth transition such as a gradual angle or a gradual arc; after molding, the required chamfer will be left on the green body.

[0035] The top arc surface of the lower punch 4 is used to form the inner arc of the magnetic tile green body; the bottom arc surface of the upper mold 1 corresponds to the position of the mold cavity of the middle mold 2 and is used to form the outer arc of the magnetic tile green body; the top of the lower punch 4 is matched to penetrate into the mold cavity of the middle mold 2 from the bottom of the mold cavity of the middle mold 2, and the bottom surface of the upper mold 1 covers the top surface of the middle mold 2, and the magnetic tile green body is formed by the space enclosed by the bottom arc surface of the upper mold 1, the top arc surface of the lower punch 4 and the mold cavity of the middle mold 2;

[0036] In the utility model, the outer shape and chamfer of the magnetic tile green body are formed by the assembly space between the upper die 1, the middle die 2 and the lower punch 4.

[0037] When the utility model is in use, the top of the lower punch 4 is matched and penetrated into the mold cavity of the middle mold 2 from the bottom of the mold cavity of the middle mold 2, and the bottom surface of the upper mold 1 covers the top surface of the middle mold 2. The magnetic tile green body is formed by the space enclosed by the bottom arc surface of the upper mold 1, the top arc surface of the lower punch 4 and the mold cavity of the middle mold 2. The raw material is injected into the molding space from the feed groove 31 and the injection port 21 to realize the molding of the magnetic tile green body.

[0038] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A ferromagnetic tile forming chamfering die, characterized in that: It comprises an upper die (1), wherein a molding chamfer (11) is provided on the arc surface of the bottom surface of the upper die (1); A middle mold (2), wherein the top arc surface of the middle mold (2) is provided with a shape matching the bottom arc surface of the upper mold (1), the middle mold (2) is also provided with a mold cavity vertically penetrating the middle mold (2), and the middle mold (2) is also provided with an injection port (21); A material distribution plate (3), wherein a feed groove (31) is arranged on the top of the material distribution plate (3); one end of the injection port (21) is connected to the feed groove (31) on the material distribution plate (3), and the other end is connected to the mold cavity of the middle mold (2); A lower punch (4), wherein the top arc surface of the lower punch (4) is provided with an upwardly protruding chamfer (41), and a desired chamfer will be left on the green body after forming; A lower punch fixing plate (5), the lower punch fixing plate (5) is used to fix the lower punch (4); The top of the lower punch (4) penetrates into the mold cavity of the middle mold (2) from the bottom of the mold cavity of the middle mold (2), and the bottom surface of the upper mold (1) covers the top surface of the middle mold (2). The magnetic tile green body is formed by the arc surface of the bottom surface of the upper mold (1), the arc surface of the top surface of the lower punch (4) and the space in the mold cavity of the middle mold (2).

2. A ferromagnetic tile forming chamfering die according to claim 1, characterized in that: Water absorption grooves (13) are arranged on both sides of the arc surface of the bottom surface of the upper mold (1).

3. The ferromagnetic tile forming chamfering die according to claim 1, characterized in that: A plurality of water absorption holes (12) are also provided on both sides of the curved bottom surface of the upper mold (1).

4. A ferromagnetic tile forming chamfering die according to claim 1, characterized in that: The top arc surface of the lower punch (4) is used to form the inner arc of the magnetic tile green body.

5. The ferromagnetic tile forming chamfering die according to claim 1, characterized in that: The arc surface of the bottom surface of the upper mold (1) corresponds to the position of the mold cavity of the middle mold (2) and is used to form the outer arc of the magnetic tile green body.

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