Automatic stacking mechanism for double-web stamping

Abstract

The application discloses a kind of double sheet stamping automatic laminating mechanism, and the lower die plate of lower die set of stamping die is equipped with two identical punching die holes A, punching die hole B, and the punch assembly is respectively arranged on the upper die set corresponding to punching die hole A, punching die hole B, and the plate material to be punched is above punching die hole A, punching die hole B, the material pushing device includes pushing plate, material supporting plate, pushing plate is located on material supporting plate and is set below punching die hole A, conveying device is set below punching die hole B, conveying device is adjacent to material supporting plate, conveying device is lower than material supporting plate, the translation pushing direction of pushing plate is from punching die hole A to punching die hole B, and the translation conveying direction of conveying device is from punching die hole B to the outside of lower die plate. The mechanism realizes double sheet one-time punching, automatic lamination and accurate alignment, provides the required equipment structure of one link for replacing single-piece material lamination with thinner thickness.

Description

TECHNICAL FIELD

[0001] The present application relates to a piece stamping mechanism, in particular to a mechanism for stamping double pieces and automatically laminating them. BACKGROUND

[0002] In recent years, brushless DC motor has been widely used in many fields such as model aircraft, medical devices, household appliances, electric vehicles, etc. and gradually become the mainstream of future market development. The research and attempt around reducing production cost and improving operating efficiency have achieved remarkable benefits, and various manufacturers also provide different types of motors to meet the needs of different drive systems. The precision of the outer rotor shell of the brushless motor is very high. The outer rotor is rotating, which requires both speed and relative position, and also needs to ensure dynamic balance. This is why the outer rotor shell generally requires measurement of perpendicularity to the shaft, tolerance requirements of diameter, outer diameter concentricity, and outer diameter runout. These are the key factors of the brushless motor outer rotor, which directly affect the service life of the brushless motor and also determine the noise level of the motor. The outer rotor shell has a large size fluctuation in production due to the fluctuation of the thickness of the raw material, which affects the dynamic balance test and causes the motor to produce a lot of noise when working, and also greatly affects the service life of the motor.

[0003] A brushless motor shell produced at present adopts 2.5mm thick galvanized steel sheet, which is first stamped into a round piece and then stretched into the shape of the motor shell. There are the following manufacturing obstacles:

[0004] 1. The domestic galvanized sheet production line cannot meet the production of 2.5mm thick material, which needs to import steel from abroad. The long procurement cycle from abroad leads to the extension of the entire product development cycle.

[0005] 2. The plate material of the brushless motor shell is relatively thick, and it is difficult for the steel plant to accurately control the thickness tolerance of the material. The fluctuation of the material thickness has an impact on the uniformity of the wall thickness of the stretched brushless motor shell, which leads to the fluctuation / overrun of the key dimensions of the product, affecting the test effect of the dynamic balance. The fluctuation of the material thickness of each batch increases the mold debugging time, which greatly affects the production efficiency. Different mold parts need to be made for different plate thickness specifications, which increases the production cost. The unqualified size cannot meet the dynamic balance requirement, which will affect the motor quality of the downstream customers.

[0006] Therefore, in order to produce such a brushless motor shell, it is necessary to overcome the adverse effects of single plate thickness. SUMMARY

[0007] The purpose of the present application is to provide a mechanism for stamping double pieces and automatically laminating them, which meets the production needs of single plate thickness stretched brushless motor shell.

[0008] Technical solution: a double piece stamping automatic stacking mechanism, comprising a stamping die with an upper die set and a lower die set, a pushing device, a conveying device,

[0009] The lower die set is provided with two identical punching die holes A and B, and the upper die set is provided with a punch assembly corresponding to the punching die holes A and B, and the punching die holes A and B are above the punching die holes A and B.

[0010] The pushing device includes a pushing plate and a supporting plate, and the pushing plate is located below the supporting plate and is arranged below the punching die hole A, and the conveying device is arranged below the punching die hole B, and the conveying device is adjacent to the supporting plate, and the conveying device is lower than the supporting plate, and the translation pushing direction of the pushing plate is from the punching die hole A to the punching die hole B, and the translation conveying direction of the conveying device is from the punching die hole B to the lower die plate.

[0011] Further, the supporting plate is provided with a proximity switch A in the punching die hole A area. The proximity switch A confirms the signal that the piece A falls on the supporting plate and feeds back.

[0012] Further, a set of opposite blocking plates is arranged on the conveying device corresponding to the punching die hole B, one of the blocking plates is located at the adjacent position of the conveying device and the supporting plate, and the other blocking plate is provided with a proximity switch B. The blocking plate helps to keep the center of the piece A and the piece B coincident when the piece A falls on the piece B, and the proximity switch B confirms the signal that the piece B falls on the supporting plate and feeds back.

[0013] Further, the translation pushing stroke of the pushing plate is arranged to make the piece A punched by the punching die hole A translate and push to the piece B punched by the punching die hole B and keep the center of the two pieces coincident.

[0014] Further, the punch assembly includes a blanking punch and a lifting pin, and the lifting pin is connected with the upper die set by a wire spring.

[0015] Further, the conveying device is a conveying belt for translation conveying.

[0016] Further, the edge of the supporting plate is arranged at the edge of the punching die hole B close to the punching die hole A.

[0017] Further, the punching die hole A and the punching die hole B increase in diameter in the depth direction, so that the piece A and the piece B are not jammed when falling.

[0018] Beneficial effects: The advantages of this invention are: the automatic stacking mechanism for double sheet stamping allows for one-time stamping of two sheets. After the pushing device completes the translational pushing, it returns to its original position. Sheets A and B are automatically stacked on the conveying device, with their centers aligned and precisely aligned. The conveying device then moves both sheets together out of the stamping die and into the stretching die for housing stamping and stretching. The pushing device and conveying device are essentially located inside the stamping die, forming a good connection with it. This invention addresses the manufacturing obstacle of producing stretching motor housings from single-sheet thick materials, providing a necessary equipment structure for one step of the process by using the stacking of thinner single-sheet materials instead of single-sheet thick materials. Attached Figure Description

[0019] Figure 1 This is a front view of the structure of the present invention;

[0020] Figure 2 for Figure 1 A top-down view;

[0021] Figure 3 This is a schematic diagram of the sheet metal and material to be punched;

[0022] Figure 4 This is a schematic diagram of the punching die hole A;

[0023] Figure 5 This is a schematic diagram showing the poses of sheet A and sheet B at their respective positions in this invention. Detailed Implementation

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] An automatic stacking mechanism for double-sheet stamping, as shown in the attached figure. Figures 1 to 3 As shown in Figure 5, it includes a stamping die 1, a feeding device 2, and a conveying device 3.

[0026] The stamping die 1 includes an upper die assembly and a lower die assembly. The upper die assembly includes an upper die base 14, an upper backing plate 15, a fixing plate 16, and a stripper plate 17 stacked from top to bottom. The lower die assembly includes a lower die template 11, a lower backing plate 18, and a lower die base 19 stacked from top to bottom.

[0027] The lower template 11 has two identical punching die holes A12 and B13. The two holes are arranged close to each other but do not interfere with each other, and their depths penetrate the lower template.

[0028] The upper module is provided with a punch assembly 14 corresponding to the punching die hole A12 and the punching die hole B13 respectively. The punch assembly 14 includes a blanking punch 141 and a ejector pin 142. The blanking punch 141 matches the punching die hole A / punching die hole B. The blanking punch is designed according to the shape and size of the material to be punched. According to the brushless motor housing to be produced, the blanking punch is round and the required size. The blanking punch is fixed to the upper pad plate. The ejector pin 142 is installed through the blanking punch 141. The ejector pin 142 is installed and connected to the upper pad plate and the upper die base through a wire spring 143, so that the ejector pin 142 can move vertically under the action of the wire spring 143.

[0029] The blank 4 to be punched is located above the lower die assembly, that is, above the lower die plate 11. When the upper die assembly is assembled relative to the lower die assembly, the punch assembly and the punching die hole A and the punch assembly and the punching die hole B work together to punch a blank A41 at the punching die hole A and a blank B42 at the punching die hole B. When the upper die assembly opens, the ejector pin acts on blank A and blank B. Blank A falls into the punching die hole A and blank B falls into the punching die hole B.

[0030] Combined with appendix Figure 4 As shown, the diameters of punching die holes A and B increase in the depth direction. The diameter of the upper edge matches the blanking punch, satisfying the punching size requirements of sheet A and sheet B. The diameter increases downward from the upper edge, so that sheet A and sheet B are not jammed when falling.

[0031] The pusher device 2 and the conveyor device 3 are both located below the lower module.

[0032] The pushing device 2 includes a pushing plate 21, a supporting plate 22, a proximity switch A23, and a cylinder 24. The pushing plate 21 is located above the horizontally placed supporting plate 22. The cylinder 24 is connected to the pushing plate 21. The cylinder pushes the pushing plate to move horizontally and can reciprocate. Therefore, it is preferable that the lower surface of the pushing plate and the upper surface of the supporting plate are close but not in contact. The pushing plate maintains this setting through its connection with the cylinder. The pushing plate 21 and the supporting plate 22 are together located below the lower die base 19 and at the punching die hole A12. The supporting plate 22 is provided with a proximity switch A23 in the punching die hole A12 area. The horizontal pushing direction of the pushing plate 21 is set from the punching die hole A12 to the punching die hole B13.

[0033] Material A falls from the punching die hole A onto the support plate. Proximity switch A confirms this signal and provides feedback. Then, the pusher plate moves and pushes material A towards the punching die hole B.

[0034] The conveying device 3 comprises a material blocking plate 31, a proximity switch B32, and a conveying belt 33. The conveying belt 33 is the main part of the conveying device 3, which is arranged below the lower die seat 19 and at the material punching die hole B13, and is arranged without interfering with the material pushing device 2. The translation conveying direction of the conveying belt 33 is from the material punching die hole B13 to the outside of the lower die plate 11. The conveying belt 33 is adjacent to the material supporting plate 22, and the conveying belt 33 is lower than the material supporting plate 22. The adjacent position C of the two is arranged at the edge of the material punching die hole B close to the side of the material punching die hole A. A set of opposite material blocking plates 31 are arranged on the frame 34 of the conveying device 3 at the position corresponding to the material punching die hole B13. One of the material blocking plates is arranged at the adjacent position C, and the proximity switch B32 is arranged on one of the material blocking plates.

[0035] Synchronously with the material piece A falling on the material supporting plate from the material punching die hole A, the material piece B falls on the conveying belt from the material punching die hole B. The proximity switch B confirms this signal and feeds back. After the proximity switch A and the proximity switch B both confirm that there is material, the feedback pushes the material pushing plate to push the material piece A to the material punching die hole B. Therefore, after the material pushing plate pushes the material piece A to the material punching die hole B, the material piece A falls on the material piece B, and the two are together on the conveying belt.

[0036] The material piece A falls on the material piece B to be overlapped, and the centers of the two need to be coincided. The height difference between the surface of the conveying belt and the surface of the material supporting plate is set to be one material piece thickness or slightly greater than one material piece thickness. When the material piece A is pushed to the material punching die hole B, the material piece B and the material supporting plate abut to support the material piece A, so that the material piece A is kept to be pushed or the material piece A slightly falls on the material piece B. A set of material blocking plates are arranged. The height difference between the surface of the material blocking plate arranged at the adjacent position C and the surface of the conveying belt is not greater than one material piece thickness, and the height difference between the surface of the opposite material blocking plate and the surface of the conveying belt is greater than one material piece thickness. The falling material piece B is positioned, and the pushed material piece A is positioned. The pushing stroke of the pushing plate is set. The above structure is set to ensure that the material piece A and the material piece B are automatically overlapped and the centers are coincided.

[0037] After the pushing plate completes the translation pushing, the material piece A and the material piece B are automatically overlapped on the conveying belt. Then, the conveying belt translates and conveys the two together to the outside of the lower die set, and reaches the stretching die to perform the shell stamping and stretching forming.

[0038] The stamping die is usually provided with a support, a base, etc. below the lower die set. The material pushing device and the conveying device are equivalent to being arranged in the stamping die, and are well combined with the stamping die.

[0039] The double-blank stamping automatic stacking mechanism of the application realizes one-time stamping, automatic stacking and precise alignment of double blanks, and can also evolve into a mechanism with structures such as three-blank stamping automatic stacking and double-station double-blank stamping automatic stacking. The double-blank stamping automatic stacking mechanism provides the required equipment structure for one link of the process of replacing single-thickness material with stacked thin-thickness material to overcome the manufacturing obstacles of manufacturing the stretch motor shell from single-thickness material.

Claims

1. A double-sheet stamping automatic stacking mechanism, characterized in that: It includes a stamping die (1) with an upper die and a lower die, a pusher (2), and a conveyor (3). The lower template (11) of the lower module is provided with two identical punching die holes A (12) and B (13). The upper module is provided with punch assemblies (14) corresponding to the punching die holes A (12) and B (13). The plate to be punched is located above the punching die holes A (12) and B (13). The pushing device (2) includes a pushing plate (21) and a supporting plate (22). The pushing plate (21) is located on the supporting plate (22) and together they are arranged below the punching die hole A (12). The conveying device (3) is arranged below the punching die hole B (13). The conveying device (3) is adjacent to the supporting plate (22) and is lower than the supporting plate (22). The translational pushing direction of the pushing plate (21) is from the punching die hole A (12) to the punching die hole B (13). The translational conveying direction of the conveying device (3) is from the punching die hole B (13) to the outside of the lower template (11). The translational pushing stroke of the pusher plate (21) is set to push the sheet A punched through the punching die hole A (12) onto the sheet B punched through the punching die hole B (13) while keeping their centers aligned.

2. The automatic stacking mechanism for double-sheet stamping according to claim 1, characterized in that: A proximity switch A (23) is provided on the material support plate (22) in the area of ​​the punching die hole A (12).

3. The automatic stacking mechanism for double-sheet stamping according to claim 1, characterized in that: The conveying device (3) is provided with a set of opposing baffles (31) corresponding to the punching die hole B (13), one of the baffles (31) is located at the junction of the conveying device (3) and the support plate (22), and one of the baffles (31) is provided with a proximity switch B (32).

4. The automatic stacking mechanism for double-sheet stamping according to claim 1, characterized in that: The punch assembly (14) includes a blanking punch (141) and a top pin (142), and the top pin (142) is connected to the upper module by a wire spring (143).

5. The automatic stacking mechanism for double-sheet stamping according to claim 1, characterized in that: The conveying device (3) uses a conveyor belt (33) for horizontal conveying.

6. The automatic stacking mechanism for double-sheet stamping according to claim 1, characterized in that: The edge of the material support plate (22) is located at the edge of the punching die hole B (13) on the side close to the punching die hole A (12).

7. The automatic stacking mechanism for double-sheet stamping according to claim 1, characterized in that: The diameters of the punching die holes A (12) and B (13) increase in the depth direction.

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