Fine blanking die applied to forming of multi-layer step angle-adjusting fluted disc

Abstract

The utility model discloses a fine blanking die applied to forming of a multi-layer step angle-adjusting fluted disc, and relates to the technical field of forming dies. The fine blanking die comprises an upper die assembly and a lower die assembly, the upper die assembly comprises a material pressing plate arranged in a floating mode, and the lower die assembly comprises a female die plate arranged in a floating mode. A gap used for containing a plate is formed between the material pressing plate and the female die plate. The fine blanking die is sequentially provided with a first station, a second station and a third station in the advancing direction of the plate. The first station is used for forming a first-stage step structure and a center hole structure of a part, the second station is used for forming a second-stage step structure of the part, and the third station is used for forming a third-stage step structure and a fluted disc structure of the part; according to the technical scheme, the finished product quality of the adjusting fluted disc can be improved.

Description

Technical Field

[0001] This utility model relates to the field of forming mold technology, and in particular to a fine stamping mold for forming multi-layer stepped angle-adjusting toothed discs. Background Technology

[0002] For the angle adjustment gear plate component in car seats (as shown in the attached document) Figure 1 As shown in the figure, it has a three-layer stepped structure, a central hole structure, and a gear disk structure. In the existing technology, the forming step is to directly punch the sheet metal to form the part using ordinary stamping. However, the force acting on the sheet metal in the ordinary stamping process is only the punching force, which makes the sheet metal prone to deformation during the punching process. This makes it difficult to guarantee the high-precision dimensional requirements of the gear disk structure of the part, and the performance of the processed tooth profile accuracy and surface flatness is poor. This leads to problems such as jamming and inaccurate positioning when adjusting the car seat angle. Based on the above reasons, there is an urgent need for a precision stamping die that can improve the quality of the finished gear disk.

[0003] It should be noted that the above content is only used to help understand the technical solution of this utility model, and does not represent an admission that the above content is prior art. Utility Model Content

[0004] The main purpose of this invention is to propose a fine stamping die for forming multi-layer stepped adjustable gear discs, aiming to improve the finished product quality of the adjustable gear discs.

[0005] To achieve the above objectives, this utility model proposes a fine blanking die for forming a multi-layer stepped adjustable gear disc; specifically, the fine blanking die includes an upper die assembly and a lower die assembly, wherein the upper die assembly includes a floating pressure plate, and the lower die assembly includes a floating concave template; the gap between the pressure plate and the concave template is used for placing the sheet metal;

[0006] The fine blanking die is provided with a first station, a second station and a third station in sequence along the forward direction of the sheet metal; the first station is used to form the first-level step structure and the center hole structure of the part, the second station is used to form the second-level step structure of the part, and the third station is used to form the third-level step mechanism and the gear plate structure of the part.

[0007] Specifically, the first station includes a punching punch and a boss ejector pin disposed on the upper die assembly, and a punching cavity and a boss punch disposed on the lower die assembly; wherein the punching punch and the punching cavity are disposed vertically opposite each other, and the boss ejector pin and the boss punch are disposed vertically opposite each other; during the die closing action, the pressure plate and the die plate are combined to press the sheet metal, the punching punch and the punching cavity are combined to form the center hole structure of the part, and the boss ejector pin and the boss punch are combined to form the first-level step structure of the part.

[0008] In one embodiment, the punching punch is fixedly disposed on the upper die assembly, the boss ejector pin is movably disposed on the upper die assembly, and one end of the boss ejector pin away from the boss punch extends to the outside of the upper die assembly and is connected to an external fourth driving device; the punching cavity and the boss punch are both fixedly disposed on the lower die assembly; during the die closing action, the fourth driving device applies a fourth force toward the boss punch to the boss ejector pin; wherein the fourth force is less than the downward force of the upper die assembly.

[0009] In one embodiment, the second station includes a secondary step counter-pressure member and a secondary step punch arranged opposite to each other. The secondary step counter-pressure member is movably disposed on the upper mold assembly, and the secondary step counter-pressure member is connected to an auxiliary driving device through a secondary step push rod. The auxiliary driving device is installed in the upper mold assembly. The secondary step punch is fixedly disposed on the lower mold assembly.

[0010] During the mold closing action, the secondary step counter-pressure member and the secondary step punch member combine to form the secondary step structure of the part. During this process, the auxiliary drive device applies an auxiliary force to the secondary step counter-pressure member toward the secondary step punch member, wherein the auxiliary force is less than the downward force of the upper mold assembly.

[0011] In one embodiment, the third station includes a forming punch and a three-stage step counter-pressure member disposed on the upper die assembly, and a forming counter-punch and a toothed punch disposed on the lower die assembly; wherein the forming punch and the forming counter-punch are arranged vertically opposite each other, and the three-stage step counter-pressure member and the toothed punch are arranged vertically opposite each other; during the die closing action, the forming punch and the forming counter-punch combine to press the outer region of the three-stage step of the part, and the three-stage step counter-pressure member and the toothed punch combine to press the three-stage step region of the part, and continue to perform reverse punching on the outer region of the three-stage step and the three-stage step region of the part as the die closing action continues, so as to form the three-stage step structure of the part.

[0012] In one embodiment, the forming punch is fixedly mounted on the upper die assembly, the three-stage stepped counter-pressure member is movably mounted on the upper die assembly, and the three-stage stepped counter-pressure member is connected to an external first driving device via a three-stage stepped push rod; the forming counter-punch and the toothed punch are both movably mounted on the lower die assembly, wherein the forming counter-punch is connected to an external second driving device via a punch push rod, and the toothed punch is connected to an external third driving device via a toothed punch push rod; during die closing, the first driving device applies a first force toward the toothed punch to the three-stage stepped counter-pressure member, the second driving device applies a second force toward the forming punch to the forming counter-punch, and the third driving device applies a third force toward the three-stage stepped counter-pressure member to the toothed punch; wherein the third force is greater than the first force, and the second force is less than the downward force of the upper die assembly.

[0013] In one embodiment, when the mold opening action is completed, the second driving device continues to apply a second force to the forming punch to eject the part from the toothed punch through the forming punch.

[0014] In one embodiment, the forming punch is arranged in a ring structure and surrounds the periphery of the three-step counter-pressure member, and the forming counter-punch is arranged in a ring structure and surrounds the periphery of the toothed punch.

[0015] In one embodiment, a plurality of punch ejector pins are provided, and the plurality of punch ejector pins are arranged in a ring at equal intervals around the axis of the forming counter-punch; and / or, a plurality of toothed punch ejector pins are provided, and the plurality of toothed punch ejector pins are arranged in a ring at equal intervals around the axis of the toothed punch ejector pin; and / or, a plurality of three-stage step ejector pins are provided, and the plurality of three-stage step ejector pins are arranged in a ring at equal intervals around the axis of the three-stage step counter-pressure member.

[0016] In one embodiment, the lower die assembly is further provided with a discharge cavity, which is connected to the punching cavity so that the punching waste of the part can be discharged to the outside of the fine blanking die through the discharge cavity.

[0017] In one embodiment, the upper mold assembly includes an upper template, an upper pad, an upper fixing plate, and a pressure plate arranged sequentially from top to bottom. The upper template is fixedly connected to the upper pad, and the upper fixing plate is fixedly connected to the pressure plate. A floating gap exists between the upper fixing plate and the upper pad. The upper mold assembly also includes a force transmission rod, the lower end of which slides sequentially through the upper template and the upper pad and is fixedly connected to the upper fixing plate. The lower mold assembly includes a lower template, a lower pad, a lower fixing plate, and a concave template arranged sequentially from bottom to top. The lower template is fixedly connected to the lower pad, and the lower fixing plate is fixedly connected to the concave template. A floating gap exists between the lower fixing plate and the lower pad. The lower mold assembly also includes a lower force transmission rod, the upper end of which slides sequentially through the lower template and the lower pad and is fixedly connected to the lower fixing plate.

[0018] The technical solution of this utility model is that during the process of the sheet metal moving forward in the fine blanking die, it first passes through the first-level step structure and the center hole structure of the forming part at the first station, then through the second-level step structure of the forming part at the second station, and finally through the third-level step structure and the gear plate structure of the forming part at the third station, thereby completing the manufacturing and processing of the angle-adjusting gear plate with a three-layer step structure, a center hole structure and a gear plate structure.

[0019] Specifically, the first station includes a punching punch and a boss ejector pin disposed on the upper die assembly, and a punching cavity and a boss punch disposed on the lower die assembly; wherein the punching punch and the punching cavity are arranged vertically opposite each other, and the boss ejector pin and the boss punch are arranged vertically opposite each other; during the mold closing action, firstly the pressure plate and the die plate are combined to press the sheet metal, then the punching punch and the punching cavity are combined to form the center hole structure of the part, and the boss ejector pin and the boss punch are combined to form the first-level step structure of the part. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a multi-layer stepped angle-adjusting toothed disc in the background art;

[0022] Figure 2 This is a schematic diagram of an embodiment of the fine stamping die for forming a multi-layer stepped adjustable gear disc provided by the present invention (in the open state).

[0023] Figure 3This is a structural schematic diagram (closed state) of an embodiment of the fine blanking die for forming a multi-layer stepped adjustable toothed disc provided by this utility model.

[0024] Figure 4 The force analysis diagram provided by this utility model is applied to the forming of multi-layer stepped angle-adjusting toothed discs.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100. Upper mold assembly; 101. Upper template; 102. Upper backing plate; 103. Upper fixing plate; 104. Pressure plate; 105. Upper force rod; 110. Secondary step counter-pressure component; 111. Auxiliary drive device; 112. Secondary step ejector pin; 120. Forming punch; 130. Tertiary step counter-pressure component; 131. Tertiary step ejector pin; 140. Punching punch; 150. Boss ejector pin;

[0027] 200. Lower die assembly; 201. Lower template; 202. Lower backing plate; 203. Lower fixing plate; 204. Concave template; 205. Lower force transmission rod; 210. Secondary step punch; 220. Forming back punch; 221. Punch ejector pin; 230. Toothed punch; 231. Toothed punch ejector pin; 240. Punching cavity; 250. Boss punch; 260. Discharge cavity;

[0028] 300. Sheet metal; 310. Parts; 311. First-level stepped structure; 312. Second-level stepped structure; 313. Third-level stepped structure; 314. Gear disc structure; 315. Center hole structure;

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] For the angle adjustment gear plate component in car seats (as shown in the attached document) Figure 1 As shown in the figure, it has a three-layer stepped structure, a central hole structure, and a gear disk structure. In the existing technology, the forming step is to directly punch the sheet metal to form the part using ordinary stamping. However, the force acting on the sheet metal in the ordinary stamping process is only the punching force, which makes the sheet metal prone to deformation during the punching process. This makes it difficult to guarantee the high-precision dimensional requirements of the gear disk structure of the part, and the performance of the processed tooth profile accuracy and surface flatness is poor. This leads to problems such as jamming and inaccurate positioning when adjusting the car seat angle. Based on the above reasons, there is an urgent need for a precision stamping die that can improve the quality of the finished gear disk.

[0034] To solve the above-mentioned technical problems, this utility model proposes a fine stamping die for forming multi-layer stepped angle-adjusting gear discs.

[0035] Please see Figure 2-3In one embodiment of this utility model, the fine blanking die includes an upper die assembly 100 and a lower die assembly 200, wherein the upper die assembly 100 includes a floating pressure plate 104, and the lower die assembly 200 includes a floating concave template 204; a gap is provided between the pressure plate 104 and the concave template 204 for placing the sheet metal 300; the fine blanking die is provided with a first station, a second station, and a third station in sequence along the forward direction of the sheet metal 300; the first station is used to form the first-level step structure 311 and the center hole structure 314 of the part 310, the second station is used to form the second-level step structure 312 of the part 310, and the third station is used to form the third-level step mechanism of the part 310 and... The gear structure 313; specifically, the first station includes a punching punch 140 and a boss ejector pin 150 disposed on the upper die assembly 100, and a punching cavity 240 and a boss punch 250 disposed on the lower die assembly 200; wherein the punching punch 140 and the punching cavity 240 are arranged vertically opposite each other, and the boss ejector pin 150 and the boss punch 250 are arranged vertically opposite each other; during the mold closing action, the pressure plate 104 and the die plate 204 are combined to press the sheet metal 300, the punching punch 140 and the punching cavity 240 are combined to form the center hole structure 314 of the part 310, and the boss ejector pin 150 and the boss punch 250 are combined to form the first-level step structure 311 of the part 310.

[0036] The technical solution of this utility model is that during the advance of the sheet metal 300 in the fine blanking die, it first passes through the first-level step structure 311 and the center hole structure 314 of the first station forming part 310, then through the second-level step structure 312 of the second station forming part 310, and finally through the third-level step structure 313 and the gear disk structure 313 of the third station forming part 310, thereby completing the manufacturing and processing of the angle adjusting gear disk with a three-layer step structure, a center hole structure 314 and a gear disk structure 313.

[0037] Specifically, the first station includes a punching punch 140 and a boss ejector pin 150 disposed on the upper mold assembly 100, and a punching cavity 240 and a boss punch 250 disposed on the lower mold assembly 200; wherein the punching punch 140 and the punching cavity 240 are arranged vertically opposite each other, and the boss ejector pin 150 and the boss punch 250 are arranged vertically opposite each other; during the mold closing action, firstly the pressure plate 104 and the die plate 204 are combined to press the sheet metal 300, then the punching punch 140 and the punching cavity 240 are combined to form the center hole structure 314 of the part 310, and the boss ejector pin 150 and the boss punch 250 are combined to form the first-level step structure 311 of the part 310.

[0038] Furthermore, the punching punch 140 is fixedly mounted on the upper die assembly 100, and the boss ejector pin 150 is movably mounted on the upper die assembly 100, with one end of the boss ejector pin 150 extending away from the boss punch 250 to the outside of the upper die assembly 100 and connected to an external fourth driving device; both the punching cavity 240 and the boss punch 250 are fixedly mounted on the lower die assembly 200; during the die closing action, the fourth driving device applies a fourth force to the boss ejector pin 150 toward the boss punch 250; wherein the fourth force is less than the downward force of the upper die assembly 100. This configuration is described in the attached diagram. Figure 4 During the fine punching process at the pre-punching station, part 310 bears the blanking force P applied to the sheet metal 300 by the blank holder 104 and the die plate 204. R and counter-pressure P G This allows the sheet metal 300 to be firmly pressed and fixed between the pressure plate 104 and the die plate 204, ensuring that the sheet metal 300 will not shift during the fine blanking process. Simultaneously, at the center hole structure 314 of part 310, the punching punch 140 descends along with the upper die assembly 100 to punch the center hole structure 314 of part 310, with the punched waste falling into the punching cavity 240. At the first-level step structure 311 of part 310, part 310 bears the upward blanking force P provided by the boss punch 250. S The blanking force is provided by the downward movement of the upper die assembly 100, i.e., the concave die 204 floats and moves downward, causing the boss punch 250, which is fixedly installed on the lower die assembly 200, to move upward in a disguised manner; on the other hand, it bears the first-level step auxiliary force F4 (i.e., the fourth force) applied to the boss push rod 150 by the fourth drive device, so as to avoid the boss push rod 150 losing its force during the upward movement, which would cause the part 310 to deform; combined with the above-mentioned blank holder force P R and counter-pressure P G This causes the first-stage step structure 311 of the part 310 in the shearing zone during the fine blanking process to be in a state of multi-directional compressive stress, thereby improving the plasticity of the material; in turn, it makes the blanked part 310 have small dimensional tolerances, high form and position accuracy, smooth blanking surface and flat surface, thereby effectively improving the quality of the finished product of the adjusting gear plate, thus avoiding problems such as jamming and inaccurate positioning when adjusting the angle of the car seat.

[0039] Furthermore, the lower die assembly 200 is also provided with a discharge cavity 260, which is connected to the punching cavity 240, so that the punching waste of part 310 can be discharged to the outside of the fine blanking die through the discharge cavity 260. This arrangement ensures that the punching waste from the center hole of part 310 is discharged sequentially through the punching cavity 240 and the discharge cavity 260, preventing the punching waste from filling the punching cavity 240 and affecting subsequent punching processes.

[0040] As a preferred embodiment of the above, the second station includes a secondary step counter-pressure member 110 and a secondary step punch 210 arranged opposite each other. The secondary step counter-pressure member 110 is movably disposed in the upper mold assembly 100 and is connected to an auxiliary drive device 111 via a secondary step push rod 112. The auxiliary drive device 111 is installed in the upper mold assembly 100. The secondary step punch 210 is fixedly disposed in the lower mold assembly 200. During the mold closing operation, the secondary step counter-pressure member 110 and the secondary step punch 210 combine to form the secondary step structure 312 of the part 310. During this operation, the auxiliary drive device 111 applies an auxiliary force to the secondary step counter-pressure member 110 toward the secondary step punch 210. The auxiliary force is less than the downward force of the upper mold assembly 100, thereby avoiding its auxiliary force from hindering the overall downward movement of the upper mold assembly 100. This configuration is described in the attached diagram. Figure 4 During the fine blanking process at the second station, part 310 firstly bears the blanking force P exerted on the sheet metal 300 by the blank holder 104 and the die plate 204. R and counter-pressure P G This allows the sheet metal 300 to be pressed and fixed between the pressure plate 104 and the die plate 204, ensuring that the sheet metal 300 will not shift during the fine blanking process; secondly, it withstands the upward blanking force P provided by the secondary stepped punch 210. S The blanking force is provided by the downward movement of the upper die assembly 100, that is, the concave die 204 floats and moves downward, causing the secondary step punch 210 fixedly installed on the lower die assembly 200 to move upward in a disguised manner; thirdly, it bears the secondary step auxiliary force F5 (i.e., auxiliary force) applied to the secondary step counter-pressure member 110 by the auxiliary drive device 111, so as to avoid the secondary step counter-pressure member 110 losing its force during the upward movement, which would cause the part 310 to deform; the above combination makes the secondary step structure 312 of the part 310 in the shearing zone during the fine blanking process in a multi-directional compressive stress state, thereby improving the plasticity of the material; thus, the blanked part 310 has small dimensional tolerance, high form and position accuracy, smooth blanking surface, and flat surface, thereby achieving the purpose of further effectively improving the quality of the finished product of the adjusting gear plate.

[0041] As a preferred embodiment of the above, the third station includes a forming punch 120 and a three-stage step counter-pressure member 130 disposed on the upper die assembly 100, and a forming counter-punch 220 and a toothed punch 230 disposed on the lower die assembly 200; wherein the forming punch 120 and the forming counter-punch 220 are arranged vertically opposite each other, and the three-stage step counter-pressure member 130 and the toothed punch 230 are arranged vertically opposite each other; during the mold closing action, the forming punch 120 and the forming counter-punch 220 combine to press the outer area of ​​the three-stage step of the part 310, and the three-stage step counter-pressure member 130 and the toothed punch 230 combine to press the three-stage step area of ​​the part 310, and continue to perform reverse punching on the outer area of ​​the three-stage step and the three-stage step area of ​​the part 310 as the mold closing action continues, so as to form the three-stage step structure 313 of the part 310. Understandably, since the forming punch 120 and the forming counter punch 220 combine to press the outer area of ​​the three-stage step of the part 310, and the three-stage counter-pressing part 130 and the toothed punch 230 combine to press the three-stage step area of ​​the part 310, when the two are stamped in opposite directions, the part 310 undergoes plastic shear deformation under the opposing forces to form the three-stage step structure 313. At the same time, during the plastic shear deformation process, the forming surface of the part 310 interacts with the toothed punch 230 so that the part 310 simultaneously forms the toothed disc structure 313, ensuring the smooth manufacturing of the adjusting toothed disc.

[0042] Specifically, the forming punch 120 is fixedly mounted on the upper die assembly 100, and the three-stage stepped counter-pressure member 130 is movably mounted on the upper die assembly 100, and the three-stage stepped counter-pressure member 130 is connected to an external first driving device (not shown in the figure) through a three-stage stepped push rod 131; the forming counter-punch 220 and the toothed punch 230 are both movably mounted on the lower die assembly 200, wherein the forming counter-punch 220 is connected to an external second driving device (not shown in the figure) through a punch push rod 221, and the toothed punch 230 is connected to a toothed punch through a toothed push rod 221. The ejector pin 231 of the toothed punch is connected to an external third drive device (not shown in the figure). During the mold closing action, the first drive device applies a first force toward the toothed punch 230 to the three-stage step-back pressure member 130, the second drive device applies a second force toward the forming punch 120 to the forming back punch 220, and the third drive device applies a third force toward the three-stage step-back pressure member 130 to the toothed punch 230. The third force is greater than the first force, and the second force is less than the downward force of the upper die assembly 100. In this way, during the fine blanking process at the third station, the part 310 firstly bears the blanking force P applied to the sheet metal 300 by the blank holder 104 and the die plate 204. R and counter-pressure P GThis ensures that the sheet metal 300 is pressed and fixed between the pressure plate 104 and the die plate 204, so as to ensure that the sheet metal 300 will not be displaced during the fine blanking process; secondly, the punch ejector 221 applies a second force to the forming counter punch 220, and the toothed punch ejector 231 applies a third force to the toothed punch 230. The above-mentioned second force and third force are both regarded as counter pressure P. G Thirdly, the three-stage step rod 131 applies a three-stage auxiliary force F6 (i.e., the first force) to the three-stage step counter-pressure member 130 to prevent the three-stage step counter-pressure member 130 from losing its force during the upward movement, thus preventing the part 310 from deforming. The above combination ensures that the three-stage step structure 313 of the part 310 in the shearing zone during the fine blanking process is in a multi-directional compressive stress state, thereby improving the plasticity of the material. This results in smaller dimensional tolerances, higher form and position accuracy, smooth blanking surface, and flat surface of the blanked part 310, thereby further improving the quality of the finished product of the adjusting gear plate.

[0043] Understandably, because the third force is greater than the first force, the toothed punch 230 can drive the three-stage counter-pressure member 130 to move upward; because the second force is less than the downward force of the upper die assembly 100, the forming punch 120 can drive the forming counter-punch 220 to move downward; thus, the outer area of ​​the three-stage step and the three-stage step area are misaligned to form the three-stage step structure 313.

[0044] Furthermore, upon completion of the mold opening action, the second driving device continues to apply a second force to the forming punch 220, thereby ejecting the part 310 from the toothed punch 230 through the forming punch 220. This configuration allows the second driving device to lift the forming punch 220 after the mold opening action is completed, ejecting the part 310 that was embedded in the toothed punch 230 during the forming process, thus achieving the unloading of the part 310 and facilitating its removal by subsequent operators.

[0045] Furthermore, the forming punch 120 is arranged in a ring structure around the periphery of the three-step counter-pressure member 130, and the forming counter-punch 220 is arranged in a ring structure around the periphery of the toothed punch 230. With this arrangement, since the toothed disc structure 313 of the part 310 is annular, the toothed punch 230 correspondingly has a cylindrical structure with a toothed profile, and the forming punch 120 and the forming counter-punch 220 are arranged in a ring structure around the annular periphery of the toothed punch 230.

[0046] Furthermore, several punch ejector pins 221 are provided, arranged in a ring at equal intervals around the axis of the forming counter-punch 220; and / or, several toothed punch ejector pins 231 are provided, arranged in a ring at equal intervals around the axis of the toothed punch ejector pin 231; and / or, several three-stage step ejector pins 131 are provided, arranged in a ring at equal intervals around the axis of the three-stage step counter-pressure member 130. This arrangement, by providing multiple punch ejector pins 221, toothed punch ejector pins 231, and three-stage step ejector pins 131, ensures that the forces acting on the forming counter-punch 220, toothed punch 230, and three-stage step counter-pressure member 130 are balanced, preventing tilting of the forming counter-punch 220, toothed punch 230, and three-stage step counter-pressure member 130.

[0047] As a preferred embodiment of the above, the upper mold assembly 100 includes an upper template 101, an upper pad 102, an upper fixing plate 103, and a pressure plate 104 arranged sequentially from top to bottom. The upper template 101 is fixedly connected to the upper pad 102, and the upper fixing plate 103 is fixedly connected to the pressure plate 104. A floating gap exists between the upper fixing plate 103 and the upper pad 102. The upper mold assembly 100 also includes an upper force rod 105, the lower end of which slides sequentially through the upper template 101 and the upper pad 102, and connects with the upper fixing plate 104. 03 Fixed Connection; The lower mold assembly 200 includes a lower template 201, a lower pad 202, a lower fixing plate 203, and a concave template 204 arranged sequentially from bottom to top. The lower template 201 is fixedly connected to the lower pad 202, and the lower fixing plate 203 is fixedly connected to the concave template 204. There is a floating gap between the lower fixing plate 203 and the lower pad 202. The lower mold assembly 200 also includes a lower force transmission rod 205. The upper end of the lower force transmission rod 205 slides through the lower template 201 and the lower pad 202 in sequence and is fixedly connected to the lower fixing plate 203. With this arrangement, since both the pressure plate 104 and the concave template 204 are floating, before the mold closing action, there is a height difference between the pressure plate 104 / concave template 204 and the forming end faces of each forming component such as the secondary step counter-pressure component 110. This height difference is used as the stamping space for the forming components after the pressure plate 104 and the concave template 204 press the sheet metal 300. To ensure that the pressure plate 104 maintains pressure on the sheet metal 300 during the subsequent downward movement of the upper mold assembly 100, an external drive device needs to apply a pressing force P towards the concave mold plate 204 to the pressure plate 104 via the transmission force rod 105. R Utilizing its blank holder force P RThe pressure plate 104 maintains constant pressure on the sheet metal 300; the lower force transmission rod 205, via an external drive device, lifts the concave template 204, placing it in a floating state; simultaneously, the vertically positioned upper force transmission rod 105 ensures that the pressure plate 104 can move vertically relative to the upper pad 102. Similarly, the vertically positioned lower force transmission rod 205 also ensures that the concave template 204 can move vertically relative to the lower pad 202 during downward movement.

[0048] It should be noted that the other contents of the fine blanking die for forming multi-layer stepped angle-adjusting gear disc disclosed in this utility model are prior art and will not be described in detail here.

[0049] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any application of this utility model directly or indirectly in other related technical fields is included within the patent protection scope of this utility model.

Claims

1. A fine blanking die for forming a multi-layered angle-adjustable gear disc, characterized in that, The fine blanking die comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises a floating pressure plate, and the lower die assembly comprises a floating die plate; a gap between the pressure plate and the die plate is used for placing a plate material; The fine blanking die is sequentially provided with a first station, a second station and a third station along the advancing direction of the plate material; the first station is used for forming a first-level step structure and a center hole structure of a part, the second station is used for forming a second-level step structure of the part, and the third station is used for forming a third-level step structure and a tooth disc structure of the part; Specifically, the first station comprises a punching convex die and a boss ejector pin arranged on the upper die assembly, and a punching concave cavity and a boss punch arranged on the lower die assembly; the punching convex die and the punching concave cavity are arranged oppositely, and the boss ejector pin and the boss punch are arranged oppositely; when a die closing action is performed, the pressure plate and the die plate are combined to press the plate material, the punching convex die and the punching concave cavity are combined to form a center hole structure of the part, and the boss ejector pin and the boss punch are combined to form a first-level step structure of the part.

2. The fine blanking die of claim 1, wherein: The punching convex die is fixedly arranged on the upper die assembly, the boss ejector pin is movably arranged on the upper die assembly, and an end of the boss ejector pin away from the boss punch extends to the outside of the upper die assembly and is connected with an external fourth driving device; the punching concave cavity and the boss punch are fixedly arranged on the lower die assembly; when the die closing action is performed, the fourth driving device applies a fourth force to the boss ejector pin towards the boss punch; The fourth force is smaller than a downward force of the upper die assembly.

3. The fine blanking die of claim 1, wherein: The second station comprises a second-level step counter-pressure piece and a second-level step convex die arranged oppositely; the second-level step counter-pressure piece is movably arranged on the upper die assembly, and is connected with an auxiliary driving device through a second-level step ejector pin; the auxiliary driving device is installed in the upper die assembly; The second-level step convex die is fixedly arranged on the lower die assembly; When the die closing action is performed, the second-level step counter-pressure piece and the second-level step convex die are combined to form a second-level step structure of the part, and during the die closing action, the auxiliary driving device applies an auxiliary force to the second-level step counter-pressure piece towards the second-level step convex die, wherein the auxiliary force is smaller than the downward force of the upper die assembly.

4. The fine blanking die of claim 1, wherein: The third station comprises a forming punch and a third-level step counter-pressure piece arranged on the upper die assembly, and a forming counter-punch and a tooth-shaped convex die arranged on the lower die assembly; the forming punch and the forming counter-punch are arranged oppositely, and the third-level step counter-pressure piece and the tooth-shaped convex die are arranged oppositely; When the die closing action is performed, the forming punch and the forming counter-punch are combined to press a third-level step peripheral area of the part, the third-level step counter-pressure piece and the tooth-shaped convex die are combined to press a third-level step area of the part, and the third-level step peripheral area and the third-level step area of the part are further subjected to reverse stamping to form a third-level step structure of the part.

5. The fine blanking die of claim 4, wherein: The forming punch is fixedly arranged in the upper die assembly, the three-stage stepped counter-pressure member is movably arranged in the upper die assembly, and the three-stage stepped counter-pressure member is connected with the first external driving device through a three-stage stepped ejector rod; The forming counter-punch and the tooth-shaped punch are movably arranged in the lower die assembly, the forming counter-punch is connected with the second external driving device through a punch ejector rod, and the tooth-shaped punch is connected with the third external driving device through a tooth-shaped punch ejector rod; During the die closing action, the first driving device applies a first force to the three-stage stepped counter-pressure member towards the tooth-shaped punch, the second driving device applies a second force to the forming counter-punch towards the forming punch, and the third driving device applies a third force to the tooth-shaped punch towards the three-stage stepped counter-pressure member; The third force is greater than the first force, and the second force is less than the downward force of the upper die assembly.

6. The fine blanking die of claim 5, wherein: After the die opening action is completed, the second driving device continues to apply the second force to the forming counter-punch to eject the part from the tooth-shaped punch through the forming counter-punch.

7. The fine blanking die of claim 5, wherein: The forming punch is in a ring structure wrapped around the periphery of the three-stage stepped counter-pressure member, and the forming counter-punch is in a ring structure wrapped around the periphery of the tooth-shaped punch.

8. The fine blanking die of claim 5, wherein: The punch ejector rod is provided with a plurality of punch ejector rods, and the plurality of punch ejector rods are arranged in a ring around the axis of the forming counter-punch at equal distances; And / or, the tooth-shaped punch ejector rod is provided with a plurality of tooth-shaped punch ejector rods, and the plurality of tooth-shaped punch ejector rods are arranged in a ring around the axis of the tooth-shaped punch ejector rod at equal distances; And / or, the three-stage stepped ejector rod is provided with a plurality of three-stage stepped ejector rods, and the plurality of three-stage stepped ejector rods are arranged in a ring around the axis of the three-stage stepped counter-pressure member at equal distances.

9. The fine blanking die of claim 1, wherein: The lower die assembly is further provided with a material discharge cavity, which is in communication with the punching cavity, so that the punching waste of the part can be discharged to the outside of the fine blanking die through the material discharge cavity.

10. The fine blanking die according to any one of claims 1 to 9, characterized in that: The upper die assembly comprises, from top to bottom, an upper die plate, an upper pad plate, an upper fixed plate and the pressure plate, wherein the upper die plate is fixedly connected with the upper pad plate, the upper fixed plate is fixedly connected with the pressure plate, and the upper fixed plate and the upper pad plate have a floating gap therebetween; the upper die assembly further comprises an upper transmission rod, the lower end of the upper transmission rod slidingly passes through the upper die plate and the upper pad plate in sequence and is fixedly connected with the upper fixed plate; The lower die assembly comprises, from bottom to top, a lower die plate, a lower pad plate, a lower fixed plate and the concave die plate, wherein the lower die plate is fixedly connected with the lower pad plate, the lower fixed plate is fixedly connected with the concave die plate, and the lower fixed plate and the lower pad plate have a floating gap therebetween; the lower die assembly further comprises a lower transmission rod, the upper end of the lower transmission rod slidingly passes through the lower die plate and the lower pad plate in sequence and is fixedly connected with the lower fixed plate.

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