Flat wire forming stamping die and stamping device

Abstract

This invention relates to the field of stamping technology, and particularly to a flat wire forming stamping die and stamping equipment. The die includes an upper die base and a lower die base adapted to the upper die base, as well as a guide block connected to the upper die base and a guide rail base slidably connected to the guide block. The guide rail base is inclined at a certain angle along the vertical direction. Under the action of the guide block and the guide rail base, the upper die base moves downward at a certain angle along the vertical direction until the upper die base and the lower die base close, with their contact position precisely abutting the bending position of the flat wire. The die provided by this invention, with the upper die base moving downward at an inclined angle to close with the lower die base, ensures line contact friction during the stamping and closing of the flat wire, avoiding damage caused by squeezing and scratching, thereby effectively guaranteeing the quality of the flat wire and the performance of the flat wire motor. It has a simple structure, low cost, and strong versatility.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, and in particular to a flat wire forming stamping die and stamping equipment. Background Technology

[0002] With the development of new energy vehicles, flat-wire motors are increasingly used in practical applications. Simultaneously, as vehicle voltage platforms rise, the requirements for the insulation performance of flat-wire enameled wires are also increasing. In the manufacturing process of flat-wire motors, the flat wire shaping process is the one that causes the most damage to the wire shape. Excessive damage to the enameled wire can lead to poor insulation, and in severe cases, can cause safety accidents.

[0003] In existing technologies, flat wires are mainly manufactured through stamping. Stamping refers to a processing method that uses a press and molds to apply external force to sheet metal, strip, tube, and profiles, causing plastic deformation or separation to obtain workpieces of the desired shape and size. Figure 1 As shown, straight flat wires need to be stamped into a shape with secondary bends using a die. The die is as follows: Figure 2 As shown, it includes an upper die with a punch and a lower die for holding the flat wire. The specific working principle is that the lower die is fixed, and the upper die punches downwards in the vertical direction quickly, pushing the flat wire to complete the deformation. Its structure is simple and the forming efficiency is high.

[0004] However, during the stamping deformation process of the aforementioned stamping die, specifically as follows: Figure 3 As shown in the diagram, frictional slippage occurs at the initial and final contact surfaces between the upper die and the flat wire, causing damage to the enameled insulation layer of the flat wire due to the squeezing and scraping of the die. In addition, the frictional deformation at the bending point is large, which will also cause serious damage, thereby affecting the quality of the flat wire and the performance of the flat wire motor. Summary of the Invention

[0005] To address the shortcomings of the prior art where flat wires are damaged by die extrusion and scraping during stamping, the present invention provides a flat wire forming stamping die, including an upper die base and a lower die base adapted to the upper die base, as well as a guide block connected to the upper die base and a guide rail base slidably connected to the guide block;

[0006] The guide rail base is inclined at a certain angle along the vertical direction. Under the action of the guide block and the guide rail base, the upper mold base moves downward at a certain angle along the vertical direction until the upper mold base and the lower mold base close together, and the contact position is exactly abutted against the bending position of the flat line.

[0007] In one embodiment, the tilt angle of the guide rail seat is consistent with the bending angle of the flat wire.

[0008] In one embodiment, the upper and lower die holders close together to form a material passage for the flat wire to be stamped.

[0009] In one embodiment, the material feeding space includes a material feeding groove disposed on the stamping part of the upper die holder and a material feeding ridge disposed on the stamping part of the lower die holder, wherein the material feeding groove and the material feeding ridge cooperate with each other; the material feeding space also includes a retaining groove disposed at the tail of the lower die holder.

[0010] In one embodiment, the surface roughness of the feed trough is less than or equal to Ra1.6 μm.

[0011] In one embodiment, a limiting block is further provided between the upper mold base and the lower mold base. The limiting block is fixed on the lower mold base and its height is flush with the height of the lower mold base to prevent overpressure on the upper mold base.

[0012] In one embodiment, an automatic clamping assembly is further included, located in the material passage space and disposed on the guide block, the automatic clamping assembly comprising:

[0013] A pressure column is slidably and vertically installed inside the guide block, and a through groove arranged in the vertical direction is opened in the middle of the pressure column;

[0014] A spring is installed inside the guide block, with one end connected to the pressure column and the other end connected to the guide block;

[0015] A fixed pin is horizontally inserted through the through groove and fixed to the guide block;

[0016] During the die-clamping process, the pressure post slowly contacts the lower die holder and moves upward under the compression of the spring until the die is fully closed. Finally, due to the reaction force of the spring, it presses against the flat wire of the lower die holder.

[0017] In one embodiment, a manual clamping assembly is also included, located in the feed space and fixed above the guide rail seat.

[0018] In one embodiment, a limiting component is further provided at the tail of the lower mold base, the limiting component comprising:

[0019] A limiting strip is provided at the bottom of the lower mold base and can reciprocate along the feeding direction; the limiting strip is provided with a positioning groove arranged along the feeding direction, and a scale value is also provided on the outside of the positioning groove.

[0020] A limiting rod is vertically set at the end of the limiting bar, and a flat wire is inserted along the feeding direction of the material passage space until its end abuts against the limiting rod;

[0021] An adjusting pin passes through a positioning slot, and the distance between the limiting rod and the lower mold base is adjusted by rotating the adjusting pin and moving the limiting strip.

[0022] The present invention also provides a stamping device that uses the flat wire forming stamping die as described above.

[0023] Based on the above, compared with the prior art, the flat wire forming stamping die provided by the present invention moves downward at a certain angle from the upper die base to close with the lower die base, so that the die makes line contact friction when stamping the flat wire, thereby avoiding damage caused by squeezing and scratching, thus effectively ensuring the quality of the flat wire and the performance of the flat wire motor. It has a simple structure, low cost, and strong versatility.

[0024] Other features and beneficial effects of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other beneficial effects of the invention can be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Unless otherwise specified, the positional relationships shown in the drawings in the following description are based on the direction in which the components are drawn in the figure.

[0026] Figure 1 A schematic diagram of the structure formed by stamping flat wire used in flat wire motors;

[0027] Figure 2 This is a schematic diagram of a common mold structure in the prior art;

[0028] Figure 3 for Figure 2 Diagram showing the state of the upper die pressing down in the middle mold;

[0029] Figure 4 This is a schematic diagram of the structure of a flat wire forming stamping die provided by the present invention;

[0030] Figure 5 An exploded view of the structure of a flat wire forming stamping die provided by the present invention;

[0031] Figure 6 A diagram showing the pressing process of the upper die of a flat wire forming stamping die;

[0032] Figure 7 An overall perspective view of a flat wire forming stamping die provided by the present invention;

[0033] Figure 8This invention provides an overall front view of a flat wire forming stamping die;

[0034] Figure 9 An overall side view of a flat wire forming stamping die provided by the present invention;

[0035] Figure 10 An exploded view of a flat wire forming stamping die provided by the present invention;

[0036] Figure 11 This is a schematic diagram of the automatic clamping assembly and guide block.

[0037] Figure label:

[0038] 10 Upper mold base, 20 Lower mold base, 40 Guide block

[0039] 50 Guide rail seat 31 Feed groove 32 Feed ridge

[0040] 30 Material feeding space 33 Card slot 21 Limit block

[0041] 60 Automatic clamping assembly; 61 Pressure column; 61a Through groove

[0042] 62 Spring, 63 Fixing Pin, 70 Manual Clamping Assembly

[0043] 80 Limiting component, 81 Limiting strip, 81a Positioning through groove

[0044] 82 Limit rod 83 Adjusting pin Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The technical features designed in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that all terms used in this invention (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and should not be construed as limiting the invention; it should be further understood that the terms used in this invention should be understood to have the same meaning as those in the context of this specification and in the relevant field, and should not be understood in an idealized or overly formal sense, except as expressly defined in this invention.

[0047] This invention provides a flat wire forming stamping die, including an upper die base 10 and a lower die base 20 adapted to the upper die base 10, and also including a guide block 40 connected to the upper die base 10 and a guide rail seat 50 slidably connected to the guide block 40; wherein, the guide rail seat 50 is inclined at a certain angle along the vertical direction, and the upper die base 10 moves downward at a certain angle along the vertical direction under the action of the guide block 40 and the guide rail seat 50 until the upper die base 10 and the lower die base 20 close together, and their contact position is exactly abutting the bending position of the flat wire.

[0048] In specific implementation, such as Figure 4 , 5 As shown in Figure 6, the stamping die includes an upper die base 10 and a lower die base 20, wherein the closing shape of the upper die base 10 and the lower die base 20 should conform to the shape of the flat wire to be produced. The stamping die 10 also includes a guide block 40 and a guide rail seat 50, wherein the guide block 40 is fixed to the upper die base 10 by a detachable or non-detachable connection, such as one or more of the following methods: threaded connection, snap connection, pin connection, welding, riveting. The guide block 40 and the guide rail seat 50, which is inclined at a certain angle, cooperate. Under the restriction of the guide rail seat 50, the guide block 40 can move obliquely downward along the guide rail seat 50 towards the lower die base 20 until the two are closed, and its contact position is exactly abutting the bending position of the flat wire, so that the die makes line contact friction when stamping the flat wire, thereby avoiding damage caused by squeezing and scratching.

[0049] Preferably, the guide rail base 50 includes a guide rail portion at the top and a support portion at the bottom, which are integrally formed; wherein, the guide rail portion has a downwardly extending groove, which is used to restrict the guide block 40 from sliding up and down; the support portion is used to place the lower mold base 20. The above configuration can effectively save costs and reduce assembly time.

[0050] It should be understood that the guide block 40 can be directly connected to one of the power sources such as a cylinder, electric cylinder, or motor through the T-slot located at the top, or indirectly connected to one of the power sources such as a cylinder, electric cylinder, or motor through a transmission mechanism such as a lead screw and nut mechanism, a synchronous belt mechanism, a gear mechanism, or a connecting rod mechanism.

[0051] Preferably, the tilt angle of the guide rail seat 50 is consistent with the bending angle of the flat wire to ensure line contact friction when the mold presses and closes the flat wire. It should be noted that the tilt angle and direction of the guide rail seat 50 are not limited to those shown in the figure. Those skilled in the art can set it according to the actual bending angle of the flat wire to be processed. For example, if the bending angle of the flat wire is 150°, then the guide rail seat 50 should also be adapted to its bending angle and set to 150°.

[0052] Preferably, the upper die holder 10 and the lower die holder 20 are closed to form a material passage space 30 for the flat wire to be stamped to pass through.

[0053] In specific implementation, such as Figure 5 , 7 As shown, when the upper mold base 10 and the lower mold base 20 are in the mold-closed state, they form a material passage space 30 for the flat wire to be stamped to pass through. The height of the material passage space 30 should match the height of the flat wire so that the flat wire can be inserted into the material passage space 30, ensuring accurate mold closing and bending, while also preventing the flat wire from being flattened in height.

[0054] Preferably, the material passage space 30 includes a material passage groove 31 disposed on the stamping part of the upper die holder 10 and a material passage ridge 32 disposed on the stamping part of the lower die holder 20, wherein the material passage groove 31 and the material passage ridge 32 cooperate; the material passage space 30 also includes a slot 33 disposed at the tail of the lower die holder 20.

[0055] In specific implementation, such as Figure 5 , 7 As shown, the depth and width of the feed groove 31, feed ridge 32, and slot 33 depend on the height and width of the flat wire. Specifically, the feed groove 31 and feed ridge 32 are located in the stamping part, and their specific shapes should match the shape obtained by stamping. The sum of the heights of the feed ridge 32 and the flat wire is the depth of the feed groove 31. The depth and width of the slot 33 should be able to fully accommodate the flat wire to be stamped. Preferably, the opening end of the feed groove 31 is rounded to effectively prevent wear on the edge of the flat wire during stamping. As a preferred embodiment, the flat wire can be manually fed into the feed space 30 and confined in the slot 33, or it can be fed into the slot 33 by an electric push rod mechanism or other feeding mechanism.

[0056] Preferably, the surface roughness of the feed groove 31 is less than or equal to Ra1.6μm, thereby ensuring smooth contact between the flat wire and the feed ridge 32, effectively avoiding indentations and scratches caused by mutual friction between the flat wires during the stamping and die-closing process.

[0057] Preferably, it also includes a limiting block 21 disposed between the upper mold base 10 and the lower mold base 20. The limiting block 21 is fixed on the lower mold base 20 and its height is flush with the height of the lower mold base 20 to prevent the upper mold base 10 from being over-pressurized.

[0058] In specific implementation, such as Figure 8 , 9As shown in Figure 10, to prevent excessive stamping of the upper die holder 10 and subsequent aggravated wear of the flat wire at the bending point, a limiting block 21 is provided at the stamping position of the lower die holder 20. The height of the limiting block 21 is flush with the height of the lower die holder 20. After stamping and mold closing, the top of the limiting block 21 can abut against the bottom of the upper die holder 10, thereby limiting further downward pressure of the upper die holder 10 and effectively protecting the device.

[0059] Preferably, the assembly further includes an automatic clamping component 60 located in the material passage space 30 and disposed on the guide block 40. The automatic clamping component 60 includes: a pressure post 61, which is slidably and vertically disposed inside the guide block 40, and the pressure post 61 has a through groove 61a arranged vertically in the middle; a spring 62, disposed inside the guide block 40, with one end connected to the pressure post 61 and the other end connected to the guide block 40; and a fixing pin 63, which passes horizontally through the through groove 61a and is fixed on the guide block 40. During die-cutting, the pressure post 61 slowly contacts the lower die base 20 and moves upward under the compression of the spring 62 until the die is fully closed. Finally, the spring 62 is pressed against the flat line of the lower die base 20 due to the reaction force of the compression.

[0060] In specific implementation, such as Figure 11 As shown, the automatic clamping assembly 60 works as follows: In the non-stamping state, the spring is relaxed, and the pressure post 61 is suspended on the guide block 40 under the constraint of the spring 62 and the fixing pin 63. During die-closing stamping, the pressure post 61 slowly contacts the lower die base 20, and then moves upwards to complete die-closing under the compression of the spring 62. Because it is located in the material passage space 30, the pressure post 61 presses against the flat wire of the lower die base 20 with the reaction force from the spring 62. This structure effectively holds the flat wire in place during stamping, preventing it from springing back and ensuring stamping stability.

[0061] It should be noted that, in order to consider the rationality of the structural distribution, the automatic clamping component 60 is set in the guide block 40 in this solution. However, those skilled in the art can set the automatic clamping component 60 in a position that follows the upper mold base 10 in the stamping movement and can press against the flat wire during mold closing and stamping, according to the actual structural requirements.

[0062] Preferably, it also includes a manual clamping assembly 70 located in the material passage space 30 and fixed above the guide rail seat 50.

[0063] In specific implementation, the manual clamping assembly 70 includes a fixed frame fixed on the guide rail seat 50 and a linkage clamping mechanism set inside the fixed frame. One end of the linkage clamping mechanism is connected to a clamping handle, and the other end is connected to a clamping block. By pulling up or pressing down the clamping handle, the linkage clamping mechanism can drive the clamping block to press against the flat wire of the lower die seat 20, thereby effectively pressing down the flat wire being stamped, preventing it from springing up, and ensuring the stability of stamping.

[0064] Preferably, the lower mold base 20 is further provided with a limiting component 80 at its tail end. The limiting component 80 includes: a limiting strip 81, which is disposed at the bottom of the lower mold base 20 and can reciprocate along the feeding direction; the limiting strip 81 is provided with a positioning groove 81a arranged along the feeding direction, and a scale value is provided on the outer side of the positioning groove 81a; a limiting rod 82, which is vertically disposed at the tail end of the limiting strip 81, and a flat wire passes through it along the feeding direction of the material passage space 30 until its end abuts against the limiting rod 82; and an adjusting pin 83, which passes through the positioning groove 81a, and the distance between the limiting rod 82 and the lower mold base 20 is adjusted by rotating the adjusting pin 83 and moving the limiting strip 81.

[0065] In specific implementation, such as Figure 7 , 8 As shown in Figure 10, its working principle is as follows: The limiting strip 81 has a scale value. Based on the actual flat wire length and the required stamping position, the distance from the limiting rod 82 to the lower die base 20 is calculated. The adjusting pin 83 is loosened, and the limiting strip 81 is adjusted to the calculated distance position. Then, the adjusting pin 83 is tightened. Finally, the flat wire is inserted along the feeding direction of the material passage space 30 until its tail end abuts against the limiting rod 82, thus limiting one end of the feeding direction and ensuring that the flat wire is stamped in the appropriate position. This structure can adapt to the forming of flat wires with different specifications and sizes without requiring mold replacement, effectively improving the versatility of the mold.

[0066] Preferably, according to the present invention, the manual adjustment of the limiting component 80 can be replaced by controlling the movement of the limiting bar 81 via a servo motor, thereby controlling the limiting rod 82 to move to a suitable position, thus achieving automated operation.

[0067] The present invention also provides a stamping device that uses the flat wire forming stamping die as described above.

[0068] As a preferred embodiment, the stamping equipment may be configured to include: a cutting mechanism for cutting flat wire, a flat wire forming stamping die as described above, a conveying insertion mechanism for conveying the cut flat wire into the stamping die, and a conveying removal mechanism for removing the stamped flat wire after stamping.

[0069] Furthermore, in the production line, from the production and processing of flat wire to the completion of stamping, and then to the assembly of the stamped flat wire into the motor, the flat wire forming stamping die can be applied to some or all of the motor production lines.

[0070] In summary, compared with existing technologies, the flat wire forming stamping die provided by this invention has a simple structure, low cost, and strong versatility. Furthermore, it effectively ensures that the surface of the stamped flat wire is not damaged by extrusion, thereby effectively guaranteeing the quality of the flat wire and the performance of the flat wire motor.

[0071] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of the present invention can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or the background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0072] Although this document frequently uses terms such as upper mold base, lower mold base, material feed space, material feed groove, guide block, material feed ridge, slot, guide rail base, limit block, automatic clamping assembly, pressure post, through groove, spring, fixing pin, manual clamping assembly, limit assembly, limit strip, positioning through groove, limit rod, and adjusting pin, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention. The terms "first," "second," etc. (if present) in the specification, claims, and accompanying drawings of the embodiments of the invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flat wire forming stamping die, characterized in that: It includes an upper mold base (10) and a lower mold base (20) adapted to the upper mold base (10), a guide block (40) connected to the upper mold base (10) and a guide rail seat (50) slidably connected to the guide block (40), and a limiting block (21) disposed between the upper mold base (10) and the lower mold base (20). The limiting block (21) is fixed on the lower mold base (20) and its height is flush with the height of the lower mold base (20) to prevent the upper mold base (10) from being over-pressurized. The guide rail seat (50) is inclined at a certain angle along the vertical direction, and the inclination angle of the guide rail seat (50) is consistent with the bending angle of the flat wire. The upper mold seat (10) moves downward at a certain angle along the vertical direction under the action of the guide block (40) and the guide rail seat (50) until the upper mold seat (10) and the lower mold seat (20) are closed. The upper mold seat (10) and the lower mold seat (20) are closed to form a material passage space (30) for the flat wire to be stamped to pass through, and its contact position is exactly abutting the bending position of the flat wire. The material passage space (30) includes a material passage groove (31) provided in the stamping part of the upper mold seat (10) and a material passage ridge (32) provided in the stamping part of the lower mold seat (20). The material passage groove (31) and the material passage ridge (32) are matched. The surface roughness of the material passage groove (31) is less than or equal to Ra1.6μm. It also includes an automatic clamping assembly (60) located in the material passage space (30) and set on the guide block (40). The automatic clamping assembly (60) includes: a pressure post (61) slidably and vertically set inside the guide block (40), and a through groove (61a) arranged in the vertical direction is opened in the middle of the pressure post (61); a spring (62) set inside the guide block (40), one end of which is connected to the pressure post (61) and the other end of which is connected to the guide block (40); a fixing pin (63) horizontally passing through the through groove (61a) and fixed on the guide block (40); when the mold is closed and stamped, the pressure post (61) slowly contacts the lower mold base (20) and moves upward to complete mold closing under the compression of the spring (62). Finally, due to the reaction force of the spring (62) being compressed, it presses against the flat line of the lower mold base (20).

2. The flat wire forming stamping die according to claim 1, characterized in that: The material handling space (30) also includes a slot (33) located at the tail of the lower mold base (20).

3. The flat wire forming stamping die according to claim 1, characterized in that, It also includes a manual clamping assembly (70) located in the feed space (30) and fixed above the guide rail seat (50).

4. The flat wire forming stamping die according to claim 1, characterized in that: The lower mold base (20) is also provided with a limiting component (80) at its tail end, the limiting component (80) comprising: A limiting bar (81) is provided at the bottom of the lower mold base (20) and can move back and forth along the feeding direction; the limiting bar (81) is provided with a positioning through groove (81a) arranged along the feeding direction, and a scale value is also provided on the outside of the positioning through groove (81a). A limiting rod (82) is vertically set at the end of the limiting strip (81), and a flat wire is inserted into the feeding direction of the material passage space (30) until its end abuts against the limiting rod (82); An adjusting pin (83) passes through a positioning slot (81a). The distance between the limiting rod (82) and the lower mold base (20) is adjusted by rotating the adjusting pin (83) and moving the limiting bar (81).

5. A stamping device, characterized in that: The flat wire forming stamping die as described in any one of claims 1-4 is used.

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