Flat wire forming stamping die and stamping equipment

Abstract

The present invention relates to the field of stamping processing technology, and in particular to a flat wire forming stamping die and stamping equipment, including an upper die base and a lower die base adapted to the upper die base, wherein the upper die base and the lower die base are combined to form a material passing space for the flat wire to be stamped to pass through, and at least one group of rollers are provided at the bottom end of the upper die base, and the rollers are used to press the flat wire when the mold is closed, so that the flat wire is bent at the pressing position. The flat wire forming stamping die provided by the present invention adds rollers to the upper die base, and when the mold is stamping and closing the flat wire, rolling friction can be used instead of sliding friction to avoid damage caused by extrusion and scratching, thereby effectively ensuring the quality of the flat wire and the performance of the flat wire motor. It has a simple structure and low cost, and is applicable to materials with different stamping shapes, and has strong versatility.

Description

Technical Field

[0001] The invention relates to the technical field of stamping processing, and in particular to a flat wire forming stamping die and stamping equipment. Background Art

[0002] With the development of new energy vehicles, the proportion of flat wire motors in practical applications is increasing. At the same time, with the improvement of the voltage platform of the whole vehicle, the requirements for the insulation performance of flat wire enameled wire are also getting higher and higher. In the process of flat wire motor production, flat wire line forming is the process that causes the greatest damage to the line shape. Enameled wire with excessive damage will lead to poor insulation, which may cause safety accidents in serious cases.

[0003] In the prior art, flat wires are mainly made by stamping and forming, which refers to a processing method that uses a press and a die to apply external force to plates, strips, tubes and profiles to cause plastic deformation or separation, thereby obtaining a workpiece of the desired shape and size. Figure 1 As shown, the straight flat wire needs to be punched into a shape with secondary bends by a die. The die is as shown in FIG. Figure 2 As shown, it includes an upper die with a punch and a lower die for placing the flat wire. The specific working principle is that the lower die is fixed, the upper die quickly punches downward in the vertical direction, and pushes the flat wire to complete the deformation. It has a simple structure and high forming efficiency.

[0004] However, during the stamping deformation process, the stamping die Figure 3 As shown, friction and slip will occur between the initial contact surface and the final contact surface of the upper die and the flat wire, as shown by the bold line, causing the enameled insulation layer of the flat wire to be damaged by the extrusion and scraping of the die. In addition, the friction deformation at the bending part 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] In order to solve the problem in the above-mentioned prior art that the flat wire is damaged by being squeezed and scratched by the mold during the stamping process, the present invention provides a flat wire forming stamping mold, including an upper mold base and a lower mold base adapted to the upper mold base, the upper mold base and the lower mold base are combined to form a material passing space for the flat wire to be punched to pass through, and at least one group of rollers are provided at the bottom end of the upper mold base, and the rollers are used for pressing with the flat wire when closing the mold so that the flat wire is bent at the pressing position.

[0006] In one embodiment, shaft holes are provided on both sides of the upper die seat, and the roller is rotatably mounted on the shaft holes located on the upper die seat.

[0007] In one embodiment, the lower die base is provided with at least one set of rollers at a bending position greater than or equal to 90°.

[0008] In one embodiment, the material transfer space includes a material transfer groove arranged at the stamping position of the upper die base and a material transfer ridge arranged at the stamping position of the lower die base, wherein the material transfer groove cooperates with the material transfer ridge; the material transfer space also includes a card slot arranged at the tail of the lower die base.

[0009] In one embodiment, a limit block is further included between the upper die base and the lower die base. The limit block is fixed on the lower die base and its height is flush with that of the lower die base to prevent overpressure on the upper die base.

[0010] In one embodiment, it also includes a base, a guide rail seat vertically arranged on the base, and a guide block slidably connected to the guide rail seat; the guide block is fixedly connected to the upper mold base so that the guide block drives the upper mold base to punch along the vertical direction.

[0011] In one embodiment, it further includes an automatic pressing assembly located in the material transfer space and disposed on the guide block, the automatic pressing assembly including:

[0012] A material pressing column is slidably disposed vertically inside the guide block, and a through groove arranged along the vertical direction is opened in the middle of the material pressing column;

[0013] A spring is arranged inside the guide block, one end of which is connected to the pressing column and the other end of which is connected to the guide block;

[0014] A fixing pin is horizontally passed through the through slot and fixed on the guide block;

[0015] When the mold is closed and stamped, the pressure column slowly contacts the lower mold base and moves upward under the compression of the spring until the mold is fully closed. Finally, it is pressed against the flat wire of the lower mold base due to the reaction force of the compressed spring.

[0016] In one embodiment, it also includes a manual pressing assembly located in the material transfer space and fixed above the guide rail seat.

[0017] In one embodiment, a limit assembly is further provided at the tail of the lower die base, and the limit assembly includes:

[0018] A limit bar, which is arranged at the bottom of the lower die seat and can reciprocate along the feeding direction; the limit bar is provided with a positioning slot arranged along the feeding direction, and a scale value is also provided on the outer side of the positioning slot;

[0019] A limit rod, which is vertically arranged at the tail end of the limit bar, and the flat wire is inserted into the feeding space along the feeding direction until its end abuts against the limit rod;

[0020] An adjusting pin is passed through the positioning slot, and the distance between the limiting rod and the lower die seat is adjusted by rotating the adjusting pin and moving the limiting strip.

[0021] The present invention also provides a stamping device, which adopts the flat wire forming stamping die as described above.

[0022] Based on the above, compared with the prior art, the flat wire forming stamping die provided by the present invention has a roller added to the upper die seat, and when the die is stamping and closing the flat wire, rolling friction can be used instead of sliding friction to avoid damage caused by extrusion and scratching, thereby effectively ensuring the quality of the flat wire and the performance of the flat wire motor. It has a simple structure, low cost, and is applicable to materials with different stamping shapes, and has strong versatility.

[0023] Other features and beneficial effects of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other beneficial effects of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positional relationships described in the drawings in the following description are based on the directions in which the components are drawn in the diagrams, unless otherwise specified.

[0025] Figure 1 A schematic diagram of the structure of the flat wire stamping used in the flat wire motor;

[0026] Figure 2 It is a schematic diagram of a common mold structure in the prior art;

[0027] Figure 3 for Figure 2 State diagram of the pressing process of the upper die in the middle die;

[0028] Figure 4 A structural exploded view of a flat wire forming stamping die provided by the present invention;

[0029] Figure 5 It is the state diagram of the upper die pressing process of the flat wire forming stamping die;

[0030] Figure 6 An overall stereoscopic diagram of a flat wire forming stamping die provided by the present invention;

[0031] Figure 7 The overall front view of a flat wire forming stamping die provided by the present invention;

[0032] Figure 8An overall side view of a flat wire forming stamping die provided by the present invention;

[0033] Fig. 9 An overall exploded view of a flat wire forming stamping die provided by the present invention;

[0034] Fig.10 It is a structural schematic diagram of the automatic clamping assembly and the guide block.

[0035] Reference numerals:

[0036] 10 Upper die base 20 Lower die base 30 Material transfer space

[0037] 31 material trough 32 material ridge 40 roller

[0038] 52 guide block 51 guide rail seat 11 shaft hole

[0039] 33 slots 21 limit blocks 90 base

[0040] 60 automatic pressing assembly 61 material pressing column 61a through groove

[0041] 62 spring 63 fixing pin 70 manual clamping assembly

[0042] 80 limiting assembly 81 limiting strip 81a positioning slot

[0043] 82 limit rod 83 adjustment pin DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and cannot be understood as limiting the present invention; it should be further understood that the terms used in the present invention should be understood to have the same meanings as these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined in the present invention.

[0046] The present invention provides a flat wire forming stamping die, comprising an upper die base 10 and a lower die base 20 matched with the upper die base 10, wherein the upper die base 10 and the lower die base 20 are combined to form a material passing space 30 for the flat wire to be punched to pass through, and at least one group of rollers 40 are arranged at the bottom end of the upper die base 10, and the rollers 40 are used for pressing with the flat wire when closing the die, so that the flat wire is bent at the pressing position.

[0047] When implementing it, Figure 4 , 5 As shown, the stamping die includes an upper die base 10 and a lower die base 20, wherein the mold shape of the upper die base 10 and the lower die base 20 should be consistent with the shape of the flat wire to be produced. In addition, the upper die base 10 and the lower die base 20 will form a feed space 30 for the flat wire to be punched to pass through when the die is closed. The height of the feed space 30 should match the height of the flat wire so that the flat wire can sink into the feed space 30 to ensure precise mold closing and bending, while also preventing the flat wire from being flattened in height.

[0048] At least one set of rollers 40 is provided at the bending part of the bottom end of the upper die base 10, and the rollers 40 are rotatably embedded in the upper die base 10. Preferably, the width of the rollers 40 is greater than or equal to the width of the flat wire to be processed. When the mold is stamping and closing the flat wire, rolling friction can be used instead of sliding friction to avoid damage caused by extrusion and scratching, thereby effectively ensuring the quality of the flat wire and the performance of the flat wire motor.

[0049] As a preferred solution, the roller 40 is detachably arranged on the upper die base 10. Specifically, the size of the roller 40 can be changed to adapt to flat wires of different specifications, making it more universal.

[0050] It should be noted that the arrangement of the roller 40 is not limited to that shown in the drawings, and those skilled in the art may arrange the roller 40 at several bending positions of the upper die holder 10 according to the actual bending shape of the flat wire.

[0051] Preferably, shaft holes 11 are provided on both sides of the upper die base 10 , and the roller 40 is rotatably mounted on the shaft holes 11 of the upper die base 10 .

[0052] In a specific implementation, a roller shaft is provided in the middle of the roller 40, wherein the roller 40 is rotatably connected to the roller shaft, and the roller shaft is rotatably connected in a manner of being fixed on the shaft hole 11. Preferably, the roller 40 can also be rotatably connected to the shaft hole 11 of the upper mold base 10 through a bearing.

[0053] Preferably, the lower die base 20 is provided with at least one set of rollers at a bending position greater than or equal to 90°.

[0054] In specific implementation, similar to the setting of the roller 40, the lower die base 20 is also provided with at least one group of rollers at a bending position greater than or equal to 90°, wherein the number of rollers should be set according to the bending angle required by the actual flat wire shape. Preferably, the width of the roller is greater than or equal to the width of the flat wire to be processed. When the mold is stamping and closing the flat wire, rolling friction can also be used instead of sliding friction to further avoid damage caused by extrusion and scratching. In addition, the roller can be rotatably connected to the lower die base 20 through a bearing, and the roller shaft can be connected to the lower die base 20 by passing the roller shaft through the middle of the roller. As a preferred embodiment, the roller is detachably arranged on the lower die base 20.

[0055] Preferably, the material transfer space 30 includes a material transfer groove 31 arranged at the stamping position of the upper die base 10 and a material transfer ridge 32 arranged at the stamping position of the lower die base 20, wherein the material transfer groove 31 cooperates with the material transfer ridge 32; the material transfer space 30 also includes a card slot 33 arranged at the tail of the lower die base 20.

[0056] When implementing it, Figure 4 , 6 As shown, the depth and width of the feed trough 31, the feed ridge 32 and the clamping groove 33 depend on the height and width of the flat wire. Specifically, the feed trough 31 and the feed ridge 32 are arranged at the stamping position, and their specific shapes should be consistent with the shape obtained by stamping, and the sum of the heights of the feed ridge 32 and the flat wire is the depth of the feed trough 31. The depth and width of the clamping groove 33 should be able to fully accommodate the flat wire to be stamped. Preferably, the open end of the feed trough 31 is chamfered to effectively prevent the edge of the flat wire from being worn during stamping. As a preferred embodiment, the flat wire can be manually fed into the feed space 30 and limited on the clamping groove 33, and the flat wire can also be fed into the clamping groove 33 by an electric push rod mechanism or other feeding mechanism.

[0057] As another preferred solution, the surface roughness of the feed groove 31 and the feed ridge 32 is less than or equal to Ra1.6μm, thereby ensuring smooth contact of the flat wire in the feed groove 31 and the feed ridge 32, and effectively avoiding indentations and scratches caused by mutual friction of the flat wire during the stamping and mold closing process.

[0058] Preferably, it further includes a limit block 21 disposed between the upper die base 10 and the lower die base 20 . The limit block 21 is fixed on the lower die base 20 , and its height is flush with that of the lower die base 20 to prevent the upper die base 10 from being over-pressurized.

[0059] When implementing it, Figure 8 , 9As shown, in order to prevent the upper die holder 10 from over-stamping and causing the flat wire to be aggravated at the bending part, the lower die holder 20 is provided with a limit block 21 at the position of the stamping part. The height of the limit block 21 is flush with the height of the lower die holder 20. After the stamping and die closing, the top of the limit block 21 can abut against the bottom of the upper die holder 10, thereby limiting the upper die holder 10 from further pressing down, effectively protecting the device.

[0060] Preferably, it also includes a base 90, a guide rail seat 51 vertically arranged on the base 90, and a guide block 52 slidably connected to the guide rail seat 51; the guide block 52 is fixedly connected to the upper mold base 10 so that the guide block 52 drives the upper mold base 10 to punch along the vertical direction.

[0061] When implementing it, Figure 6 , 7 As shown in Figures 8 and 9, the guide block 52 cooperates with the guide rail seat 51. Under the restriction of the guide rail seat 51, the guide block 52 can move along the guide rail seat 51 toward the lower mold base 20. A T-slot is provided on the top of the guide block 52. The T-slot can be directly connected to one of the power sources such as a cylinder, an electric cylinder, a motor, etc., or can be indirectly connected to one of the power sources such as a cylinder, an electric cylinder, a motor, etc. through a transmission mechanism such as a screw nut mechanism, a synchronous belt mechanism, a gear mechanism, a connecting rod mechanism, etc.

[0062] Preferably, the guide rail seat 51 is fixed on the base 90, and includes a guide rail portion at the top and a support portion at the bottom, which are integrally formed; wherein the guide rail portion is provided with a groove extending downward, and the groove is used to limit the upward and downward sliding of the guide block 52; and the support portion is used to place the lower mold seat 20. The above arrangement can effectively save costs and reduce assembly time.

[0063] Preferably, it also includes an automatic clamping component 60 located in the material transfer space 30 and arranged on the guide block 52, and the automatic clamping component 60 includes: a pressing column 61, which is slidably vertically arranged inside the guide block 52, and a through groove 61a arranged along the vertical direction is opened in the middle of the pressing column 61; a spring 62, which is arranged inside the guide block 52, one end of which is connected to the pressing column 61, and the other end is connected to the guide block 52; a fixing pin 63, which passes through the through groove 61a horizontally and is fixed on the guide block 52; when the mold is closed and stamped, the pressing column 61 slowly contacts the lower mold base 20, and moves upward under the compression of the spring 62 to complete mold closing, and finally presses against the flat wire of the lower mold base 20 due to the reaction force of the compressed spring 62.

[0064] When implementing it, Fig.10As shown, the working principle of the automatic clamping assembly 60 is that when no stamping is performed, the spring is relaxed, and the press column 61 is suspended on the guide block 52 under the restriction of the spring 62 and the fixing pin 63; when the die is closed and stamped, the press column 61 slowly contacts the lower die seat 20, and then moves upward to complete die closing under the compression of the spring 62. Since it is located in the material passing space 30, the press column 61 will just press against the flat wire of the lower die seat 20 due to the reaction force of the compressed spring 62. Through the above structure, the flat wire being stamped can be effectively pressed to prevent it from bouncing, thereby ensuring the stability of stamping.

[0065] It should be noted that in order to consider the rationality of the distribution of the structure, the present solution sets the automatic clamping assembly 60 on the guide block 52, and those skilled in the art can set the automatic clamping assembly 60 to a position that follows the stamping movement of the upper die base 10 and can press the flat wire during mold closing and stamping according to actual structural requirements.

[0066] Preferably, it also includes a manual pressing assembly 70 located in the material transfer space 30 and fixed above the guide rail seat 51 .

[0067] In specific implementation, the manual clamping assembly 70 includes a fixed frame fixed on the guide rail seat 51, and a connecting rod clamping mechanism arranged inside the fixed frame. One end of the connecting rod clamping mechanism is connected to a clamping handle, and the other end is connected to a clamping block. By bending or pressing the clamping handle up or down, the connecting rod clamping mechanism can drive the clamping block to press against the flat wire of the lower die seat 20, thereby effectively pressing the flat wire being stamped to prevent it from bouncing up, thereby ensuring the stability of the stamping.

[0068] Preferably, a limiting assembly 80 is also provided at the tail of the lower die base 20, and the limiting assembly 80 includes: a limiting bar 81, which is provided at the bottom of the lower die base 20 and can move back and forth along the feeding direction; the limiting bar 81 is provided with a positioning slot 81a arranged along the feeding direction, and a scale value is also provided on the outer side of the positioning slot 81a; a limiting rod 82, which is vertically provided at the tail end of the limiting bar 81, and the flat wire is inserted into the feeding direction of the feed space 30 until its end is against the limiting rod 82; an adjusting pin 83, which passes through the positioning slot 81a, and the distance between the limiting rod 82 and the lower die base 20 is adjusted by rotating the adjusting pin 83 and moving the limiting bar 81.

[0069] When implementing it, Figure 6 , 7As shown in Figure 9, the working principle is as follows: the limit bar 81 is provided with a scale value, and the distance from the limit rod 82 to the lower die seat 20 is converted according to the actual length of the flat wire and the required stamping position, the adjustment pin 83 is loosened, the limit bar 81 is adjusted to the above-converted distance position, and then the adjustment pin 83 is tightened. Finally, the flat wire is inserted along the feeding direction of the feed space 30 until its tail end abuts against the limit rod 82, that is, one end of the feeding direction is limited, so as to ensure that the flat wire is stamped at a suitable position. Through the above structure, it can adapt to the molding of flat wires with different specifications and dimensions without having to replace the mold, which effectively improves the versatility of the mold.

[0070] Preferably, according to the concept of the present invention, the manual adjustment of the limit assembly 80 can be replaced by controlling the movement of the limit bar 81 through a servo motor and then controlling the limit rod 82 to move to a suitable position, thereby realizing automated operation.

[0071] The present invention also provides a stamping device, which adopts the flat wire forming stamping die as described above.

[0072] As a preferred solution, the stamping equipment can be configured to have: a cutting mechanism for cutting the flat wire, a conveying and inserting mechanism for conveying the cut flat wire into the stamping die using the flat wire forming stamping die as described above, a conveying and removing mechanism for removing the stamped flat wire after the stamping is completed, etc.

[0073] Furthermore, in the production line, from the production and processing of the flat wire to the completion of the stamping, and then to the assembly of the stamped flat wire into the motor, the flat wire forming stamping die can be applied to part or all of the motor production lines.

[0074] In summary, compared with the prior art, the flat wire forming stamping die provided by the present invention has a simple structure, low cost, and is applicable to materials of different stamping shapes, and has strong versatility. It can also effectively ensure that the surface of the stamped flat wire will not be damaged, thereby effectively ensuring the quality of the flat wire and the performance of the flat wire motor.

[0075] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0076] Although the terms such as upper die seat, lower die seat, material transfer space, material transfer groove, guide block, shaft hole, material transfer ridge, guide rail seat, roller, slot, limit block, base, automatic clamping assembly, material pressing column, through groove, spring, fixing pin, manual clamping assembly, limit assembly, limit bar, positioning through groove, limit rod, adjustment pin, etc. are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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: The invention comprises an upper die base (10) and a lower die base (20) adapted to the upper die base (10); the upper die base (10) and the lower die base (20) are combined to form a material transfer space (30) for a flat wire to be punched to pass through; at least one group of rollers (40) are arranged at the bottom end of the upper die base (10); the rollers (40) are used to press the flat wire when the die is closed, so that the flat wire is bent at the pressing position; the material transfer space (30) comprises a material transfer groove (31) arranged at the punching position of the upper die base (10) and a material transfer groove (32) arranged at the lower die base (20). A material transfer ridge (32) at a stamping portion, wherein a material transfer groove (31) cooperates with the material transfer ridge (32); the surface roughness of the material transfer groove (31) and the material transfer ridge (32) is less than or equal to Ra1.6μm; and further comprising a base (90), a guide rail seat (51) vertically arranged on the base (90), and a guide block (52) slidably connected to the guide rail seat (51); the guide block (52) is fixedly connected to the upper die seat (10) so that the guide block (52) drives the upper die seat (10) to stamp in a vertical direction; It also includes an automatic pressing assembly (60) located in the material transfer space (30) and arranged on the guide block (52), the automatic pressing assembly (60) including: A material pressing column (61) is slidably disposed vertically inside the guide block (52), and a through groove (61a) arranged in the vertical direction is formed in the middle of the material pressing column (61); a spring (62) disposed inside the guide block (52), one end of which is connected to the pressing column (61) and the other end of which is connected to the guide block (52); a fixing pin (63) horizontally passing through the through slot (61a) and fixed on the guide block (52); During mold closing and stamping, the pressing column (61) slowly contacts the lower mold base (20) and moves upward under the compression of the spring (62) until the mold is completely closed. Finally, due to the reaction force of the compressed spring (62), it presses against the flat wire of the lower mold base (20).

2. The flat wire forming stamping die according to claim 1, characterized in that: Axial holes (11) are provided on both sides of the upper die seat (10), and the roller (40) is rotatably mounted on the axial holes (11) located on the upper die seat (10).

3. The flat wire forming stamping die according to claim 1, characterized in that: The lower die seat (20) is provided with at least one set of rollers at a bending position greater than or equal to 90°.

4. The flat wire forming stamping die according to claim 1, characterized in that: The material transfer space (30) further comprises a clamping groove (33) arranged at the rear of the lower die base (20).

5. The flat wire forming stamping die according to claim 1, characterized in that: It also includes a limit block (21) arranged between the upper die base (10) and the lower die base (20); the limit block (21) is fixed on the lower die base (20) and its height is flush with that of the lower die base (20) to prevent the upper die base (10) from being over-pressurized.

6. The flat wire forming stamping die according to claim 1, characterized in that: It also includes a manual pressing assembly (70) located in the material transfer space (30) and fixed above the guide rail seat (51).

7. The flat wire forming stamping die according to claim 1, characterized in that: A limit assembly (80) is also provided at the tail of the lower die base (20), and the limit assembly (80) comprises: a limit bar (81), the limit bar (81) being arranged at the bottom of the lower die seat (20) and being reciprocatingly movable along the feeding direction; the limit bar (81) being provided with a positioning through groove (81a) arranged along the feeding direction, and a scale value being further provided on the outer side of the positioning through groove (81a); a limiting rod (82), the limiting rod (82) being vertically arranged at the tail end of the limiting strip (81), and the flat wire is passed through the feeding space (30) along the feeding direction until its end abuts against the limiting rod (82); An adjusting pin (83) is provided through the positioning slot (81a), and the distance between the limiting rod (82) and the lower die seat (20) is adjusted by rotating the adjusting pin (83) and moving the limiting strip (81).

8. A stamping device, characterized in that: A flat wire forming stamping die as described in any one of claims 1 to 7 is used.

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