Fisheye flat gasket stamping die

Abstract

The utility model discloses a fisheye flat gasket stamping die which is characterized in that a fisheye extruding station, a punching station, a blanking station and a guide pin mounting station are correspondingly arranged on a concave die plate, a lower base plate and a lower die plate at the lower end part of the die; the female die plate is further provided with a conical rod mounting station and a guide punching rod avoiding station. And a fisheye extruding mounting station, a punching mounting station and a blanking mounting station which are respectively arranged corresponding to the fisheye extruding station, the punching station and the blanking station are arranged on a stripping template and an upper fixing plate at the lower end part of the die. The stripping template is further provided with a conical rod avoiding station, a guide pin avoiding station and a guide punching rod installing station which correspond to the conical rod installing station, the guide pin installing station and the guide punching rod avoiding station respectively. The punching die is high in punching efficiency, the material utilization rate can be remarkably increased, the high precision of the surface parallelism and planeness of the fisheye flat gasket can be guaranteed, and the punching die can be produced in a large scale.

Description

Technical Field

[0001] The utility model belongs to the technical field of fastener manufacturing, and in particular relates to a production die for forming stamping parts, and is particularly suitable for stamping production of fisheye flat washers. Background Art

[0002] Stamping is a forming method that uses a press and a die to apply external force to plates, strips, pipes and profiles to cause plastic deformation or separation, thereby obtaining a workpiece (stamping part) of the desired shape and size. Automobile bodies, chassis, fuel tanks, radiators, boiler drums, container shells, and iron core silicon steel sheets of motors and electrical appliances are all stamped.

[0003] Fisheye flat pads currently on the market Figure 1 As shown, in the production of the stamping die for the fisheye flat gasket, when the flat gasket output is large and the delivery time is urgent, most of them adopt a single-step discharge method of discharging multiple pieces at a time. The single-step discharge method has the problems of many processing stations, large stamping dies and low production efficiency.

[0004] The traditional fisheye flat gasket forming process is generally: produce multiple pieces at a time and pre-punch a hole smaller than the bottom hole, then punch the fisheye hole, and then punch the bottom hole again. However, this forming process will cause a convex mark on the gasket during the secondary punching, which will seriously affect the use function of the gasket. And punching multiple pieces at a time will cause the pressure of the sheet metal in the punching and blanking stations to concentrate, causing the sheet metal to warp and affect the flatness and parallelism of the fisheye flat gasket. If the flatness and parallelism of the fisheye flat gasket need to be guaranteed, a subsequent pressing process can be added for shaping. If the overlap value is set too small, it will cause the sheet metal to rupture, the gasket quality is poor, the yield rate cannot be guaranteed, and the production efficiency is low. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a fisheye flat pad stamping die, which not only has high blanking efficiency and high production efficiency, but also can significantly improve material utilization rate and ensure high precision of fisheye flat pad surface parallelism and flatness, and is a stamping die that can be mass-produced.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fisheye flat pad stamping die, comprising an upper die portion and a lower die portion correspondingly arranged up and down; the lower die portion comprises a concave die plate, a lower pad and a lower die plate fixedly connected in sequence from top to bottom; wherein,

[0008] The concave template, the lower pad and the lower template are respectively provided with a fish eye squeezing station, a punching station, a blanking station and a guide pin installation station; the concave template is also provided with a cone rod installation station and a guide punch rod avoidance station; a cone rod is installed at the cone rod installation station; a guide pin is installed at the guide pin installation station;

[0009] The upper end of the mold includes an upper mold plate, an upper pad, an upper fixing plate and a stripping mold plate which are fixedly connected from top to bottom in sequence; wherein,

[0010] The stripping template and the upper fixed plate are correspondingly provided with a fisheye squeezing installation station, a punching installation station and a blanking installation station; the upper pad, the upper fixed plate and the stripping template are correspondingly provided with a stripping spring avoidance station, and the stripping spring avoidance station is provided corresponding to the stripping spring; the stripping spring is installed on the stripping template; a chamfering punch is installed on the fisheye squeezing installation station; a punching punch is installed on the punching installation station; a blanking punch is installed on the blanking installation station; a guide punch is installed on the guide punch installation station; the fisheye squeezing installation station is provided corresponding to the fisheye squeezing station; the punching installation station is provided corresponding to the punching station; the blanking installation station corresponds to the blanking station;

[0011] A cone rod avoidance station, a guide pin avoidance station and a guide punch rod installation station are also provided on the stripping template; the cone rod avoidance station corresponds to the cone rod installation station; the guide pin avoidance station corresponds to the guide pin installation station; the guide punch rod installation station corresponds to the guide punch rod avoidance station.

[0012] In the stamping die for a fisheye flat pad as described above, the rod head of the cone rod is composed of a frustum-shaped rod head and a cylindrical rod head, and the frustum-shaped rod head connects the cylindrical rod body and the cylindrical rod head.

[0013] In the fisheye flat pad stamping die as described above, the chamfered punch rod is provided with a large cylindrical rod body and a small cylindrical rod body, and a transition chamfered portion is provided between the large cylindrical rod body and the small cylindrical rod body.

[0014] The technical solution provided above has the following beneficial effects:

[0015] First, compared with the stamping process of traditional stamping dies, the fisheye flat gasket stamping die of the utility model adds a fisheye extrusion process and two pre-forming processes, and reduces the secondary punching and pre-punching processes. The fisheye extrusion process can ensure that the gasket does not need to be punched twice, avoiding the boss mark caused by the secondary punching, and the squeezed material can be used to reduce the bottom hole diameter and improve the material utilization rate. The pre-forming process can ensure the flatness and parallelism of the gasket, and there is no need to add a pressing process like the traditional process. A double step distance can reduce the processing stations, reduce the mold size, improve the processing efficiency, and save time and economic costs.

[0016] Secondly, the excess material squeezed out by the fisheye squeezing process of the utility model will flow to the bottom hole of the gasket, so that the bottom hole meets the requirements of the drawing, saving materials, improving material utilization and avoiding boss marks caused by secondary punching. The material utilization rate improved varies according to different products and can be increased by at least 1%.

[0017] Third, the preforming process of the utility model can flatten the raised conical surface punched on the plate by the punching process, so that the parallelism of the gasket is guaranteed, and the parallelism of the processed gasket can be controlled to about 0.01mm.

[0018] Fourth, the fisheye flat pad stamping die of the utility model adopts a double-step discharge method over the single-step discharge method in the prior art. The advantage is that: because the blanking holes cannot be arranged closely in a single step, otherwise the strength between the holes will be insufficient, reducing the service life of the mold. Therefore, a single step will have empty stations in a stamping cycle, reducing production efficiency. There will be no empty stations in a double step. Therefore, the double step will have fewer stations than the single step, improving production efficiency and reducing time and economic costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the fisheye flat pad;

[0021] Figure 2 It is a schematic diagram of the half-section three-dimensional structure of the fisheye flat pad;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the fisheye flat pad punching die of the utility model;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the stamping die of the fisheye flat pad of the utility model;

[0024] Figure 5 It is a schematic diagram of the top view of the stamping die of the fisheye flat pad of the utility model (excluding the upper die);

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the concave mold plate of the fisheye flat pad stamping die of the utility model;

[0026] Figure 7 It is a schematic diagram of the top view structure of the concave mold plate of the fisheye flat pad stamping die of the utility model;

[0027] Figure 8It is a schematic diagram of the three-dimensional structure of the bottom pad of the fisheye flat pad stamping die of the utility model;

[0028] Fig. 9 It is a schematic diagram of the top view of the lower pad of the fisheye flat pad stamping die of the utility model;

[0029] Fig.10 It is a schematic diagram of the three-dimensional structure of the lower template of the fisheye flat pad stamping die of the utility model;

[0030] Fig.11 It is a schematic diagram of the top view of the lower template of the fisheye flat pad punching die of the utility model;

[0031] Fig.12 It is a schematic diagram of the three-dimensional structure of the stripping template of the fisheye flat pad stamping die of the utility model;

[0032] Fig.13 It is a schematic diagram of the top view structure of the stripping template of the fisheye flat pad stamping die of the utility model;

[0033] Fig.14 It is a schematic diagram of the three-dimensional structure of the upper fixing plate of the fisheye flat pad stamping die of the utility model;

[0034] Fig.15 It is a schematic diagram of the top view of the upper fixing plate of the fisheye flat pad stamping die of the utility model;

[0035] Fig.16 It is a schematic diagram of the three-dimensional structure of the upper pad of the fisheye flat pad stamping die of the utility model;

[0036] Fig.17 It is a schematic diagram of the top view of the upper pad of the fisheye flat pad stamping die of the utility model;

[0037] Fig.18 It is a schematic diagram of the three-dimensional structure of the upper template of the fisheye flat pad stamping die of the utility model;

[0038] Fig.19 It is a schematic diagram of the top view of the upper template of the fisheye flat pad stamping die of the utility model;

[0039] Fig. 20 It is a schematic diagram of the top view structure of the chamfered punch bar of the fisheye flat pad punching die of the utility model;

[0040] Fig.21 It is a schematic diagram of the top view structure of the cone rod of the fisheye flat pad punching die of the utility model;

[0041] Fig. 22 It is a three-dimensional structural diagram of the punching state of the punching process of the fisheye flat pad punching die of the utility model;

[0042] Fig.23It is a three-dimensional structural schematic diagram of the reset state of the punching process of the fisheye flat pad punching die of the utility model;

[0043] Fig.24 It is a three-dimensional structural schematic diagram of the fisheye forming state of the fisheye flat pad stamping die of the utility model;

[0044] Fig.25 It is a three-dimensional structural schematic diagram of the reset state of the fisheye flat pad stamping die of the utility model in the fisheye forming process;

[0045] Fig.26 It is a three-dimensional structural diagram of the pre-punching state of the pre-forming process of the stamping die for the fisheye flat pad of the utility model;

[0046] Fig. 27 It is a three-dimensional structural schematic diagram of the reset state of the preforming process of the fisheye flat pad stamping die of the utility model;

[0047] Fig.28 It is a three-dimensional structural schematic diagram of the blanking state of the blanking process of the fisheye flat pad stamping die of the utility model;

[0048] Fig.29 It is a three-dimensional structural schematic diagram of the reset state of the blanking process of the fisheye flat pad stamping die of the utility model;

[0049] Fig.30 It is a three-dimensional structural schematic diagram of the cutting state of the fisheye flat pad stamping die of the utility model during the cutting process;

[0050] Fig.31 It is a three-dimensional structural schematic diagram of the reset state of the cutting process of the fisheye flat pad stamping die of the utility model;

[0051] Fig.32 This is a schematic diagram of the first station layout of the stamping process of the gasket stamping die of the utility model;

[0052] Fig.33 This is a schematic diagram of the second station layout of the stamping process of the gasket stamping die of the utility model;

[0053] Fig.34 This is a schematic diagram of the third station layout of the stamping process of the gasket stamping die of the utility model;

[0054] Fig.35 This is a schematic diagram of the fourth station layout of the stamping process of the gasket stamping die of the utility model;

[0055] Fig.36 This is a schematic diagram of the fifth station layout of the stamping process of the gasket stamping die of the utility model;

[0056] Fig.37 This is a schematic diagram of the sixth station layout of the stamping process of the gasket stamping die of the utility model;

[0057] Fig.38 This is a schematic diagram of the seventh station layout of the stamping process of the gasket stamping die of the utility model;

[0058] Fig.39 It is a schematic diagram of the eighth station layout of the stamping process of the gasket stamping die of the utility model. DETAILED DESCRIPTION

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0060] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0061] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0062] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0063] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0064] See also Figures 1 to 4 As shown, the utility model is a fisheye flat gasket stamping die, including a die upper end part and a die lower end part which are arranged correspondingly up and down. The die upper end part is driven downward by a punching machine to complete the forming of the fisheye flat gasket. Figure 1As shown, the fisheye flat gasket is a gasket with a fisheye hole O in the middle of the gasket body. In this embodiment, the bottom surface of the countersunk hole is a downwardly inclined conical surface.

[0065] Please structure Figure 3 and Figure 4 As shown, the lower end portion of the mold of the utility model includes a concave mold plate 11, a lower pad 12 and a lower mold plate 13 which are fixedly connected from top to bottom in sequence. The concave mold plate 11, the lower pad 12 and the lower mold plate 13 are fixedly connected by a lower mold locating pin 14 and a lower mold fastening bolt 15.

[0066] The concave template 11, the lower pad 12 and the lower template 13 are provided with a fish eye squeezing station 100, a punching station 300, a blanking station 400, a guide pin installation station 500, a guide column avoidance station 800, a lower positioning pin installation station 900 and a lower die bolt installation station. The concave template 11 is also provided with a cone rod installation station 200, a guide punch rod avoidance station 600 and a lower guide sleeve installation station 700.

[0067] The upper end of the mold of the utility model comprises an upper mold plate 1, an upper pad 2, an upper fixing plate 5 and a stripping mold plate 8 which are fixedly connected in sequence from top to bottom. The upper mold plate 1, the upper pad 2 and the upper fixing plate 5 are fixedly connected by an upper mold positioning pin 29 and an upper mold fastening bolt 28; the upper fixing plate 5 and the stripping mold plate 8 are connected by a stripping bolt 27.

[0068] The upper template 1, the upper pad 2, the upper fixed plate 5 and the stripping template 8 are provided with an upper positioning pin installation station 8000 and an upper die bolt installation station. The stripping template 8 and the upper fixed plate 5 are provided with a fish eye installation station 1000, a punching installation station 3000, a blanking installation station 4000, a guide column installation station 7000 and an upper positioning pin installation station 8000. The upper pad 2, the upper fixed plate 5 and the stripping template 8 are provided with a stripping spring avoidance station 9000.

[0069] The fisheye extrusion installation station 1000 is set corresponding to the fisheye extrusion station 100 at the lower end of the mold; the punching installation station 3000 is set corresponding to the punching station 300 at the lower end of the mold; the blanking installation station 4000 corresponds to the blanking station 400 at the lower end of the mold; the guide column installation station 7000 corresponds to the guide column avoidance station 800 at the lower end of the mold. The stripping spring avoidance station 9000 is set corresponding to the stripping spring 25 installed on the stripping template 8.

[0070] A cutter installation station is also provided on the upper fixed plate 5. A taper bar avoidance station 2000, a guide pin avoidance station 5000, a guide punch installation station 6000 and an upper guide sleeve installation station are also provided on the stripping template 8. The taper bar avoidance station 2000 is provided corresponding to the taper bar installation station 200 of the lower end of the mold; the guide pin avoidance station 5000 is provided corresponding to the guide pin installation station 500 of the lower end of the mold; the guide punch installation station 6000 is provided corresponding to the guide punch avoidance station 600 of the lower end of the mold; the upper guide sleeve installation station is provided corresponding to the lower guide sleeve installation station 700 of the lower end of the mold; the upper guide sleeve installation station and the lower guide sleeve installation station 700 are provided corresponding to the guide column installation station 7000 of the upper end of the mold and the guide column avoidance station 800 of the lower end of the mold.

[0071] For details, please combine Figure 6 and Figure 7 As shown, the concave mold plate 1 of the utility model is provided with a fisheye squeezing station 100, a cone rod installation station 200, a punching station 300, a blanking station 400, a guide pin installation station 500, a guide punch rod avoidance station 600, a lower guide sleeve installation station 700, a guide column avoidance station 800, a lower positioning pin installation station 900 and a lower die bolt installation station.

[0072] The fisheye squeezing station 100 provided on the concave mold plate 1 is larger than the bottom diameter and outer diameter of the chamfering punch 23 , forming a clearance fit to prevent the chamfering punch 23 from colliding with the concave mold plate 11 .

[0073] The diameter of the tapered rod installation station 200 provided on the concave mold plate 1 is equal to the outer diameter of the tapered rod 16, forming a transition fit.

[0074] Please combine Fig.21 As shown, the cone rod 16 of the utility model is composed of a cylindrical rod body 16A and a rod head. The rod head is composed of a cone-shaped rod head 16B and a cylindrical rod head 16C, and the cone-shaped rod head 16B connects the cylindrical rod body 16A and the cylindrical rod head 16C. When the upper end of the mold is pressed down, the cone-shaped rod head 16B can arch the plate 50 in advance, and the cylindrical rod head 16C can protect the bottom hole that has been punched on the plate 50 to avoid deformation; when blanking, the cone-shaped rod head 16B flattens the arched part in advance to ensure the flatness of the fisheye flat pad.

[0075] The diameter of the punching station 300 provided on the concave template 1 is larger than the outer diameter of the punching rod 24, forming a clearance fit to prevent the punching rod 24 from colliding with the concave template 11. The punching station 300 adopts an insert structure. In this embodiment, the punching station 300 is set on the first insert 31, and the first insert 31 is fixed to the concave template 11 by the insert fastening bolt 10. The hole position of the insert fastening bolt 10 is set on the front of the concave template 11, so that when the punching station 300 is worn out or damaged later, the first insert 31 can be replaced without replacing the entire plate to save costs.

[0076] The diameter of the blanking station 400 provided on the concave template 1 is larger than the outer diameter of the blanking punch 21, forming a clearance fit to prevent the blanking punch 21 from colliding with the concave template 11. The blanking station 400 adopts an insert structure. In this embodiment, the blanking station 400 is arranged on the second insert 32 and the third insert 33, and the second insert 32 and the third insert 33 are fixed to the concave template 11 by insert fastening bolts 10. The hole of the insert fastening bolt 10 is located on the front of the concave template 11, so that when the blanking station 400 is worn out or damaged later, the second insert 32 and the third insert 33 can be replaced without replacing the entire plate to save costs.

[0077] The guide pin installation station 500 provided on the concave template 1 is a countersunk through hole, the diameter of the through hole portion of the countersunk through hole is larger than the outer diameter of the small end of the guide pin 19, and the diameter of the countersunk part of the countersunk through hole is larger than the outer diameter of the large end of the guide pin 19, which facilitates the installation of the guide pin 19 and forms a clearance fit. A guide spring 18 and a screw plug 17 are also provided in the through hole portion of the countersunk through hole, and the guide spring 18 is provided between the guide pin 19 and the screw plug 17 to support the guide pin 19. The function of the guide pin 19 is to lift, remove and guide the plate 50.

[0078] The diameter of the guide punch avoidance station 600 provided on the concave mold plate 1 is the same as that of the punching station 300, which makes way for the guide punch 22 at the upper end of the mold and plays a role in accurately positioning the plate 50.

[0079] The lower guide sleeve installation station 700 and the guide post avoidance station 800 provided on the concave template 1 are countersunk through holes, the diameter of the countersunk part of the countersunk through hole is equal to the diameter of the large end of the lower guide sleeve 9, and the diameter of the through hole part of the countersunk through hole is equal to the diameter of the small end of the lower guide sleeve 9, forming a transition fit. The lower guide sleeve 9 is assembled on the reverse side of the concave template 11. The lower guide sleeve 9 is installed on the reverse side of the concave template 11 to prevent the lower guide sleeve 11 from falling off under repeated impacts and to guide and give way to the guide post 7 at the upper end of the mold.

[0080] The lower positioning pin installation station 900 provided on the concave mold plate 1 is transitionally matched with the lower mold positioning pin 14 to accurately position the assembly position of the lower end part of the mold.

[0081] The lower die bolt installation station provided on the concave template 1 is a countersunk through hole, and the diameter of the through hole part of the countersunk through hole is larger than the small end diameter of the lower die fastening bolt 15, forming a clearance fit. The diameter of the countersunk hole part of the countersunk through hole is larger than the head diameter of the lower die fastening bolt 15, which is easy to install. The concave template 11, the lower pad 12, and the lower template 13 are connected by the lower die fastening bolt 15.

[0082] please Figure 8 and Fig. 9 As shown, the lower pad 12 of the utility model is provided with a fisheye squeezing station 100, a punching station 300, a blanking station 400, a guide pin installation station 500, a guide column avoidance station 800, a lower positioning pin installation station 900 and a lower die bolt installation station.

[0083] The diameter of the punching station 300 provided on the lower pad 12 is larger than the diameter of the punching station 300 provided on the concave template 11, so as to facilitate the falling of the waste material 60 and avoid blockage.

[0084] The diameter of the blanking station 400 provided on the lower pad 12 is larger than the diameter of the blanking station 400 provided on the concave mold plate 11, so as to facilitate the falling of the workpiece and avoid blockage.

[0085] The fisheye squeezing station 100, the guide pin installation station 500, the guide column avoidance station 800, the lower positioning pin installation station 900 and the lower die bolt installation station provided on the lower pad 12 have the same diameter and function as the corresponding stations provided on the concave mold plate 11.

[0086] Please combine Fig.10 and Fig.11 As shown, the lower template 13 of the utility model is provided with a fisheye squeezing station 100, a punching station 300, a blanking station 400, a guide pin installation station 500, a guide column avoidance station 800, a lower positioning pin installation station 900 and a lower mold bolt installation station.

[0087] The diameter of the punching station 300 provided on the lower template 13 is larger than the diameter of the punching station 300 provided on the lower pad 12, so as to facilitate the falling of the waste material 60 and avoid blockage.

[0088] The diameter of the blanking station 400 provided on the lower template 13 is larger than the diameter of the blanking station 400 provided on the lower pad 12, so as to facilitate the falling of the workpiece and avoid blockage.

[0089] The reverse tapping thread of the guide pin installation station 500 provided on the lower mold plate 13 is provided with a screw plug 17, and the thread diameter and depth are the same as the thread diameter and length of the screw plug 17. The screw plug 17 supports a guide spring 18 to resist the guide pin 19.

[0090] The lower die bolt installation stations provided on the lower die plate 13 are all tapped, and the thread diameter is the same as the thread diameter of the lower die fastening bolt 15. The concave die plate 11, the lower pad 12 and the lower die plate 13 are connected by the lower die fastening bolt 15.

[0091] Please combine Fig.12 and Fig.13 As shown, the stripping template 8 of the utility model is provided with a fisheye squeezing installation station 1000, a cone rod avoidance station 2000, a punching installation station 3000, a blanking installation station 4000, a guide pin avoidance station 5000, a guide punch rod installation station 6000, an upper guide sleeve installation station, a guide column installation station 7000, an upper positioning pin installation station 8000 and an upper mold bolt installation station.

[0092] The fisheye extrusion installation station 1000 provided on the stripping template 8 is a countersunk through hole, and the diameter of the through hole part of the countersunk through hole is equal to the outer diameter of the middle end of the chamfering punch rod 23, forming a transition fit.

[0093] Please combine Fig. 20 As shown, the chamfering punch 23 of the present invention is composed of a countersunk punch head 23A, a large cylindrical rod body 23B and a small cylindrical rod body 23C in sequence, and a transition chamfering portion 23D is provided between the large cylindrical rod body 23B and the small cylindrical rod body 23C.

[0094] The countersunk rod head 23A is mounted on the upper fixing plate 5 to fix the chamfering punch 23. The large cylindrical rod body 23B with a large outer diameter is used to form the fisheye hole O and squeeze the excess material of the fisheye hole O so that the material flows downward, shrinks the bottom hole, and reaches the drawing size. The small cylindrical rod body 23C with a small outer diameter has a protective function for the fisheye flat washer, which can prevent the bottom hole from shrinking too much, resulting in the fisheye flat washer bottom hole size being too small, thereby improving material utilization and saving economic costs.

[0095] The punching installation station 3000 provided on the stripping template 8 is a countersunk through hole, and the diameter of the through hole part of the countersunk through hole is equal to the outer diameter of the small end of the punching rod 24, forming a transition fit. The diameter of the countersunk part of the countersunk through hole is equal to the outer diameter of the large end of the punching rod 24, so as to avoid the punching rod 24 colliding with the stripping template 8 during movement and causing damage.

[0096] The blanking installation station 4000 provided on the stripping template 8 is a countersunk through hole, and the diameter of the through hole part of the countersunk through hole is equal to the outer diameter of the small end of the blanking punch 21, forming a transition fit. The diameter of the countersunk part of the countersunk through hole is equal to the outer diameter of the large end of the blanking punch 21, thereby preventing the blanking punch 21 from colliding with the stripping template 8 during movement and causing damage.

[0097] The diameter of the guide pin avoidance station 5000 provided on the stripping template 8 is the same as the diameter of the guide pin installation station 500 provided on the concave template 11, and the reverse side of the stripping template 8 is turned into a blind hole to play a role of giving way.

[0098] The guide punch rod installation station 6000 provided on the stripping template 8 is a countersunk through hole, and the diameter of the through hole part of the countersunk through hole is equal to the diameter of the small end of the guide punch rod 22, forming a transition fit.

[0099] The upper guide sleeve installation station and guide column installation station 7000 provided on the stripping template 8 are countersunk through holes. The upper guide sleeve 6 is installed on the front side of the stripping template 8. The function of the upper guide sleeve 6 is to guide and give way to the guide column 7.

[0100] The diameter of the through hole portion of the countersunk through hole at the upper guide sleeve installation station is equal to the diameter of the small end of the upper guide sleeve 6, forming a transition fit. The diameter of the countersunk through hole at the upper guide sleeve installation station is larger than the diameter of the large end of the upper guide sleeve 8, which is easy to install.

[0101] The outer diameter of the upper positioning pin installation station 8000 provided on the stripping template 8 is equal to the outer diameter of the upper mold positioning pin 29, forming a transition fit to accurately position the assembly position of the upper end part of the mold.

[0102] The upper die bolt installation stations provided on the stripping template 8 are all tapped, and the thread diameter is the same as the bolt diameter of the stripping bolt 27. The stripping template 8 is connected to the upper fixed plate 5 through the stripping bolt 27.

[0103] Please combine Fig.14 and Fig.15 As shown, the upper fixed plate 5 of the utility model is provided with a fisheye squeezing installation station 1000, a punching installation station 3000, a blanking installation station 4000, a guide column installation station 7000, an upper positioning pin installation station 8000, a stripping spring avoidance station 9000, a cutter installation station and an upper die bolt installation station.

[0104] The fisheye squeezing installation station 1000 provided on the upper fixed plate 5 is a countersunk through hole, which is the fixing position of the chamfering punch rod 23; the diameter of the through hole part of the countersunk through hole is equal to the outer diameter of the middle end of the chamfering punch rod 23, forming a transition fit, and the diameter of the countersunk part of the countersunk through hole is larger than the outer diameter of the countersunk of the chamfering punch rod 23, forming a clearance fit, which is convenient for the installation of the chamfering punch rod 23.

[0105] The punching installation station 3000 provided on the upper fixed plate 5 is a countersunk through hole, which is the fixing position of the punching punch rod 24; the diameter of the through hole part of the countersunk through hole is equal to the outer diameter of the large end of the punching punch rod 24, forming a transition fit, and the diameter of the countersunk part of the countersunk through hole is larger than the countersunk diameter of the punching punch rod 24, forming a clearance fit, which is convenient for the installation of the punching punch rod 24.

[0106] The blanking installation station 4000 provided on the upper fixed plate 5 is a countersunk through hole, which is the fixing position of the blanking punch rod 21; the diameter of the through hole part of the countersunk through hole is equal to the outer diameter of the large end of the blanking punch rod 21, forming a transition fit, and the diameter of the countersunk part of the countersunk through hole is larger than the countersunk diameter of the blanking punch rod 21, forming a clearance fit, which facilitates the installation of the blanking punch rod 21.

[0107] The guide post installation station 7000 provided on the upper fixed plate 5 is a countersunk through hole, which is the fixing position of the guide post 7; the diameter of the through hole part of the countersunk through hole is equal to the outer diameter of the guide post 7, forming a transition fit, and the diameter of the countersunk part of the countersunk through hole is larger than the diameter of the countersunk of the guide post 7, forming a clearance fit, which facilitates the installation of the guide post 7. The function of the guide post 7 is to ensure the precise positioning of the upper and lower molds of the mold and to guide the mold stroke.

[0108] The outer diameter of the upper positioning pin installation station 8000 provided on the upper fixing plate 5 is equal to the outer diameter of the upper mold positioning pin 29, forming a transition fit to accurately position the assembly position of the upper end part of the mold.

[0109] The inner diameter of the stripping spring avoidance station 9000 provided on the upper fixed plate 5 is larger than the outer diameter of the stripping spring 25, forming a clearance fit. The stripping spring 25 is installed on the stripping mold plate 8, and the stripping spring 25 helps the upper fixed plate 5 to automatically reset and separate the punching punch 24, the chamfering punch 23 and the blanking punch 21 from the plate 50.

[0110] The cutter installation station provided on the upper fixed plate 5 is clearance-matched with the cutter bolt 4, and the cutter 3 is fixed on the upper fixed plate 5 through the cutter bolt installation station, so as to cut the plate 50 and avoid the problem of the plate 50 being too long.

[0111] The upper die bolt installation station provided on the upper fixed plate 5 is provided with a through hole for installing a contour sleeve and a threaded hole for installing a fastening bolt. A contour sleeve 26 is installed in the through hole for installing a contour sleeve, and the diameter of the through hole for installing a contour sleeve is larger than the outer diameter of the contour sleeve 26, forming a clearance fit. The stripping bolt 27 is installed on the contour sleeve 26 to connect the stripping template 8 with the upper fixed plate 5. The upper die fastening bolt 28 is screwed into the threaded hole for installing the fastening bolt, and the upper fixed plate 5, the upper pad 2 and the upper template 1 are connected through the upper die fastening bolt 28.

[0112] Please combine Fig.16 and Fig.17 The upper pad 2 of the utility model is provided with an upper positioning pin installation station 8000, a stripping spring avoidance station 9000 and an upper die bolt installation station.

[0113] The upper mold bolt installation station provided on the upper pad 2 has a large through hole and a small through hole. The diameter of the large through hole is larger than the diameter of the head of the stripping bolt 27 to give way to the stripping bolt 27 and prevent the stripping bolt 27 from colliding with the mold; the diameter of the small through hole is larger than the head of the upper mold fastening bolt 28 to form a clearance fit to connect the upper fixing plate 5, the upper pad 2 and the upper mold plate 1.

[0114] The upper positioning pin installation station 8000 and the stripping spring avoidance station 9000 provided on the upper pad plate 2 have the same purpose and diameter as the corresponding stations provided on the upper fixing plate 5 .

[0115] Please combine Fig.18 and Fig.19 As shown, the upper mold plate 1 of the utility model is provided with an upper positioning pin installation station 8000, a stripping spring avoidance station 9000 and an upper mold bolt installation station.

[0116] The upper die bolt installation station provided on the upper die plate 1 is provided with a large through hole, a small through hole and a countersunk through hole. The large through hole is used to connect the punching machine and the upper die plate 1; the diameter of the small through hole is larger than the head diameter of the stripping bolt 27, so as to give way to the stripping bolt 27 and prevent the stripping bolt 27 from colliding with the die; the through hole portion of the countersunk through hole has a larger diameter than the upper die fastening bolt 28, forming a clearance fit; the countersunk portion of the countersunk through hole has a larger diameter than the head diameter of the upper die fastening bolt 28, which facilitates the installation of the upper die fastening bolt 28, so as to connect the upper fixing plate 5, the upper pad 2 and the upper die plate 1.

[0117] The upper positioning pin installation station 8000 and the stripping spring avoidance station 9000 provided on the upper template 1 have the same diameter and purpose as the corresponding stations provided on the upper pad 2.

[0118] The fisheye flat pad stamping die of the utility model is a stamping die that adopts a one-time double-step discharging method. Specifically, the stamping process of the fisheye flat pad stamping die of the utility model includes a punching process, a fisheye extruding process, a preforming process, a blanking process and a cutting process in sequence.

[0119] For details, please combine Fig. 22 and Fig.23As shown, the punching process of the utility model is driven by the upper end of the mold (including the upper template 1, the upper pad 2, the upper fixed plate 5 and the stripping template 8) to move downward through the punching machine, pressing the guide pin 19 to move downward, the guide spring 18 is compressed, and the guide pin 19 presses the plate 50 to move downward. When it moves downward to contact the concave template 11, the stripping template 8 presses the plate 50, the stripping spring 25 is compressed, and the punching punch 24 is driven to move downward, and the plate 50 is separated to punch out a circular hole, and the diameter of the circular hole is larger than the diameter of the fisheye hole punched out in the fisheye squeezing process. The waste material 60 punched out falls out through the concave template 11, the lower pad 12, and the lower template 13 in sequence. After the waste material 60 is punched out, the punching machine moves upward, the stripping spring 25 rebounds, the upper end of the mold is reset, the guide pin 19 presses the plate 50, and the plate 50 is separated from the stripping template 8 and the punching punch 24, completing the punching process.

[0120] Please combine Fig.24 and Fig.25 As shown, the fisheye squeezing process of the utility model is that the upper end part of the mold (including the upper template 1, the upper pad 2, the upper fixed plate 5 and the stripping template 8) is driven by the punching machine to move downward, pressing the guide pin 19 to move downward, the guide spring 18 is compressed, and the guide pin 19 presses the plate 50 to move downward. When it moves downward to contact the concave template 11, the stripping template 8 presses the plate 50, and the stripping spring 25 is compressed, driving the chamfering punch 23 to move downward, and the plate 50 punches out fisheye holes at the position of the circular hole punched out in the corresponding punching process. The diameter of the fisheye hole is smaller than the diameter of the circular hole punched out in the punching process; after the fisheye hole is punched out, the punching machine moves upward, the stripping spring 25 rebounds, the upper end part of the mold is reset, the guide pin 19 presses the plate 50, and the plate 50 is separated from the stripping template 8 and the chamfering punch 23, completing the fisheye squeezing process.

[0121] Specifically, when punching the fisheye hole, the transition chamfered portion 23D of the chamfering punch rod 23 will first contact the plate 50 corresponding to the position of the circular hole, and squeeze the plate 50 downward. When the downward flowing plate material contacts the plane of the concave template 11, the plate material flows to the middle of the circular hole, reducing the aperture of the circular hole. When the plate material contacts the small cylindrical rod 23C of the chamfering punch rod 23, the flow of the plate material stops, avoiding excessive shrinkage of the circular hole resulting in the fisheye hole being too small after forming. Since the fisheye hole is formed by the free flow of the plate material once, there is no secondary force, which can avoid the formation of boss marks.

[0122] Please combine 26 and Fig. 27As shown, the preforming process of the utility model is that the upper end part of the mold (upper template 1, upper pad 2, upper fixed plate 5 and stripping template 8) is driven by the punching machine to move downward, press the guide pin 19 to move downward, the guide spring 18 is compressed, and the guide pin 19 presses the plate 50 to move downward. When the downward movement contacts the concave template 11, the stripping template 8 presses the plate 50, and the cone rod 16 on the concave template 11 pushes the plate 50 upward, and the plate 50 punches out the preformed hole 51 at the position corresponding to the fisheye hole punched out in the fisheye squeezing process. The stripping template 8 has a reserved avoidance hole position to prevent the plate 50 from being unable to complete the warping deformation. After the plate 50 is warped and deformed, the punching machine moves upward, the stripping spring 25 rebounds, the upper end part of the mold is reset, the guide pin 19 presses the plate 50, and the plate 50 is separated from the stripping template 8 and the cone rod 16, completing the preforming process.

[0123] When multiple fisheye flat washers are blanked at one time, the plate will warp due to stress concentration. The utility model warps the plate 50 in advance in the preforming process. In the subsequent blanking process, the plate that has been warped in advance can be flattened again due to stress concentration, so that the flatness of the fisheye flat washers can be controlled within 0.01mm (theoretically, the plate 50 will warp the same amount during blanking as during preforming).

[0124] Please combine Fig.28 and Fig.29 As shown, the blanking process of the utility model is that the upper end part of the mold (upper template 1, upper pad 2, upper fixed plate 5 and stripping template 8) is driven by the punching machine to move downward, pressing the guide pin 19 to move downward, the guide spring 18 is compressed, and the guide pin 19 presses the plate 50 to move downward. When the downward movement contacts the concave template 11, the stripping template 8 presses the plate 50, the stripping spring 25 is compressed, and the blanking punch 21 moves downward, and the plate 50 is separated and punched out of the fisheye flat pad 52. The punched down fisheye flat pad 52 falls out through the concave template 11, the lower pad 12, and the lower template 13. After the fisheye flat pad 52 is punched out, the punching machine moves upward, the stripping spring 25 rebounds, the upper end part of the mold is reset, the guide pin 19 presses the plate, and the plate 50 is separated from the stripping template 8 and the blanking punch 21, completing the blanking process.

[0125] Please combine Fig.30 and Fig.31As shown, the cutting process of the utility model is that the upper end part of the mold (upper template 1, upper pad 2, upper fixed plate 5 and stripping template 8) is driven by the punching machine to move downward, pressing the guide pin 19 to move downward, the guide spring 18 is compressed, and the guide pin 19 presses the plate 50 to move downward. When the downward movement contacts the concave template 11, the stripping template 8 presses the plate, the stripping spring 25 is compressed, and the cutter 3 moves downward to cut the plate. After cutting the plate, the punching machine moves upward, the stripping spring 25 rebounds, the upper end part of the mold is reset, the guide pin 19 presses the plate 50, and the plate 50 is separated from the stripping template 8 and the cutter 3 to complete the cutting process.

[0126] The fisheye flat washer stamping die of the utility model is a stamping die that adopts a one-time double-step discharging method. That is to say, the stamping process of the fisheye flat washer stamping die of the utility model adopts a one-time double-step discharging method, and the cutting process is arranged after the one-time double-step punching process, the fisheye extruding process and the preforming process.

[0127] For details, please refer to Figure 32 to Figure 39 As shown, the first station of the stamping process of the stamping die for the fisheye flat gasket of the utility model performs a punching process, and punches six holes at a time with serial numbers 1 to 6 respectively; the second station newly punches out six holes with serial numbers 7 to 12 respectively, and serial number 5 performs a fisheye squeezing process; the third station newly punches out six holes with serial numbers 13 to 18 respectively, and serial number 5 performs a preforming process, and serial numbers 4, 6, and 11 perform a fisheye squeezing process; the fourth station newly punches out six holes with serial numbers 19 to 24 respectively, and serial number 5 performs blanking to punch out fisheye flat gaskets; serial numbers 4, 6, and 11 perform a preforming process, and serial numbers 10, 12, and 17 perform a fisheye squeezing process; the fifth station newly punches out six holes with serial numbers 25 to 30 respectively, and serial numbers 4, 6, and 11 perform a blanking process to punch out gaskets; serial numbers 10, 12, and 17 perform a preforming process, and serial numbers 2, 16, 18, and 23 perform a fisheye squeezing process; the sixth process Six new holes are punched out with numbers 31 to 36, numbers 10, 12, and 17 are used for blanking to punch out gaskets, numbers 2, 16, 18, and 23 are used for preforming, numbers 1, 3, 8, 22, 24, and 29 are used for fisheye squeezing, and in the seventh process, six new holes are punched out with numbers 37 to 42, numbers 2, 16, 18, and 23 are used for blanking to punch out gaskets, numbers 1, 3, 8, 22, 24, and 29 are used for fisheye squeezing. 4, 29 are pre-formed, and numbers 7, 9, 14, 26, 30, and 35 are fish-eye squeezed; in the eighth process, six new holes are punched out, numbers 43 to 48, numbers 1, 3, 8, 22, 24, and 29 are blanked, fish-eye flat pads are punched out, numbers 7, 9, 14, 26, 30, and 35 are pre-formed, and numbers 13, 15, 20, 32, 36, and 41 are fish-eye squeezed. After the next station is cut off, the eight-station process is repeated until all the plates are processed.

[0128] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A fisheye flat pad stamping die, comprising an upper die portion and a lower die portion correspondingly arranged up and down; wherein: in, The lower end portion of the mold comprises a concave mold plate (11), a lower pad (12) and a lower mold plate (13) which are fixedly connected in sequence from top to bottom; wherein: The concave mold plate (11), the lower pad (12) and the lower mold plate (13) are provided with a fish eye squeezing station (100), a punching station (300), a blanking station (400) and a guide pin installation station (500) respectively; the concave mold plate (11) is also provided with a cone rod installation station (200) and a guide punch rod avoidance station (600); a cone rod (16) is installed on the cone rod installation station (200); and a guide pin (19) is installed on the guide pin installation station (500); The upper end portion of the mold comprises an upper mold plate (1), an upper pad (2), an upper fixing plate (5) and a stripping mold plate (8) which are fixedly connected in sequence from top to bottom; wherein: The stripping template (8) and the upper fixed plate (5) are provided with a fish eye squeezing installation station (1000), a punching installation station (3000) and a blanking installation station (4000) respectively; the upper pad (2), the upper fixed plate (5) and the stripping template (8) are provided with a stripping spring avoidance station (9000) respectively, and the stripping spring avoidance station (9000) is provided corresponding to the stripping spring (25); the stripping spring (25) is installed on the stripping template (8); at the fish eye squeezing installation station (1000 ) is provided with a chamfering punch rod (23); the punching installation station (3000) is provided with a punching punch rod (24); the blanking installation station (4000) is provided with a blanking punch rod (21); the guide punch rod installation station (6000) is provided with a guide punch rod (22); the fisheye extrusion installation station (1000) is provided corresponding to the fisheye extrusion station (100); the punching installation station (3000) is provided corresponding to the punching station (300); the blanking installation station (4000) corresponds to the blanking station (400); A cone bar avoidance station (2000), a guide pin avoidance station (5000), and a guide punch bar installation station (6000) are also provided on the stripping template (8); the cone bar avoidance station (2000) is provided corresponding to the cone bar installation station (200); the guide pin avoidance station (5000) is provided corresponding to the guide pin installation station (500); and the guide punch bar installation station (6000) is provided corresponding to the guide punch bar avoidance station (600).

2. The fisheye flat pad stamping die according to claim 1, characterized in that: The chamfering punch (23) is provided with a large cylindrical rod body (23B) and a small cylindrical rod body (23C), and a transition chamfering portion (23D) is provided between the large cylindrical rod body (23B) and the small cylindrical rod body (23C).

3. A fisheye flat pad stamping die according to claim 1 or 2, characterized in that: The rod head of the cone rod (16) is composed of a cone-shaped rod head (16B) and a cylindrical rod head (16C), and the cone-shaped rod head (16B) connects the cylindrical rod body (16A) and the cylindrical rod head (16C).

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