Die stamping device for accessory production

Abstract

The invention belongs to the technical field of accessory stamping machining, and particularly relates to an accessory production die stamping device which comprises an upper die and a lower die. A punch and a plurality of pre-pressing springs for positioning a stamping part are arranged in the upper die; a groove is formed in the top end of the lower die, a base is arranged in the groove, and a base is rotationally connected into the groove; a material pushing assembly is arranged on the base; an air pressure conduction assembly and a hole processing assembly are arranged on the base; when a punch is used for punching, a material pushing assembly is synchronously extruded, a pressure roller is driven to trigger an air pressure conduction assembly to distribute air to a hole processing assembly through an air channel, a sliding block is driven to drive a scraper to rotate with a base as the axis to cut burrs, punching and burr cleaning integrated machining is achieved, and traditional modes such as manual grinding and roller polishing do not need to be relied on; the labor intensity is reduced, the problems of uneven hole wall roughness, workpiece deformation and high device maintenance cost are solved, batch production is adapted, and the machining efficiency and consistency are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of accessory stamping processing, and particularly relates to a die stamping device for accessory production. BACKGROUND

[0002] A drawing and punching die with patent number CN202210873280.1 is disclosed to solve the problem that the existing die is difficult to draw and punch the sheet metal at the same time, thereby causing deviation of the production precision of the part. To this end, the drawing and punching die comprises a first die seat and a second die seat arranged correspondingly, a pressure ring arranged in the second die seat, a punch assembly arranged in the pressure ring, and a concave die assembly connected with the first die seat. The pressure surface and the local surface can draw the local area of the sheet metal, and the accuracy of punching is ensured by the arrangement of the punch and the through hole.

[0003] In the prior art including the above patent, the following defects still exist: After punching, burrs will appear on the outer wall of the accessory hole. There are many reasons for the problem, for example, when the die blade edge is worn and blunt, the blade angle is unreasonable, or the gap between the convex and concave dies is too large or too small, which will cause incomplete shearing of the material and residual unbroken metal on the edge. Secondly, due to the high toughness and low hardness of the material itself, plastic deformation rather than brittle fracture will occur during punching, thereby forming burrs. In addition, insufficient punching pressure, improper punching speed or impurities on the surface of the sheet metal will also affect the shearing effect, causing excess metal protrusions on the outer wall of the hole.

[0004] However, the existing methods for processing punching burrs have obvious limitations. Manual polishing and scraping are inefficient and labor-intensive, and the processing accuracy depends on manual operation, which can cause uneven roughness of the hole wall and is difficult to adapt to mass production. Cylinder polishing, sandblasting and grinding may cause slight deformation of the workpiece, especially for thin-walled or high-precision parts. In addition, there is a problem of fast consumption of abrasive and high equipment maintenance cost. In addition, the chamfering and other machining operations need to be carried out through secondary processing. If the hole center deviates during chamfering, the chamfering will fail, affecting the processing quality. SUMMARY

[0005] The purpose of the present application is to provide a die stamping device for accessory production, which synchronously extrudes the pushing assembly by the punch, triggers the gas pressure conduction assembly to shunt gas, drives the scraper to rotate and cut burrs with the base, realizes the integration of stamping and burr cleaning, eliminates the need for traditional manual polishing and cylinder polishing, reduces labor intensity, solves the problems of rough hole wall, workpiece deformation and high maintenance cost, adapts to mass production, and improves processing efficiency and consistency.

[0006] To achieve the above-mentioned purpose of the application, the following technical solutions are adopted: The utility model provides a mould stamping device for accessory production, including upper die and lower die, the inside of upper die is equipped with punch and a plurality of pre -press spring for positioning to punch, the top of lower die is equipped with recess, the recess is equipped with pedestal, the inside rotation of recess is connected with base, be equipped with pushing assembly on the pedestal, be equipped with air pressure transmission subassembly and hole processing subassembly on the base, air pressure transmission subassembly and hole processing subassembly are communicated through air channel, the inner chamber of base is equipped with air channel, the outside wall of base is equipped with conical tooth ring.

[0007] According to some embodiments of the present application, the top end of the base is provided with a sliding groove, the sidewall of the base is provided with a first cavity in communication with the air channel, the inner bottom wall of the first cavity is provided with a limiting ring, the base is further provided with a one-way air outlet valve, the one-way air outlet valve is in communication with the air channel, the other end of the air channel is in communication with a third cavity, the sidewall of the base is provided with a limiting groove, the limiting groove is located at the top end of the third cavity, the center of the base is provided with a bearing, and the bearing is sleeved on the outer wall of the pedestal.

[0008] According to some embodiments of the present application, the hole processing assembly comprises a sliding block and a scraper; the sliding block is slidingly connected in the sliding groove, one end of the sliding block is provided with an extension rod, one end of the extension rod is slidingly inserted in the first cavity, one end of the extension rod is provided with a first air pressure block, one side of the first air pressure block intermittently abuts against the limiting ring, the other end of the sliding block is provided with a one-way air inlet valve in plug-fit communication with the one-way air outlet valve, one end of the one-way air inlet valve is in communication with an air pressure channel, the air pressure channel is provided in the interior of the sliding block, the other end of the air pressure channel is in communication with a second cavity, a pneumatic push rod is movably inserted in the second cavity, one end of the pneumatic push rod is provided with a second air pressure block, one side of the second air pressure block is connected with the inner sidewall of the second cavity through a spring, and the other end of the pneumatic push rod is slidingly penetrated through the second cavity and hingedly connected with the sidewall of the scraper.

[0009] According to some embodiments of the present application, the air pressure transmission subassembly comprises a telescopic push rod slidingly inserted in the third cavity, one end of the telescopic push rod is provided with a third air pressure block, the other end of the telescopic rod is provided with a connecting rod, the bottom end of the connecting rod is connected with the bottom wall of the limiting groove through a spring, and the other end of the connecting rod is provided with a pressure receiving ring.

[0010] According to some embodiments of the present application, the pushing assembly comprises a plug-in barrel provided at the top end of the base, the inner cavity of the plug-in barrel is provided with a lifting spring, the bottom end of the lifting spring is mounted on the top of the pedestal, the top end of the lifting spring is provided with a lifting piece, the outer sidewall of the lifting piece is provided with a plurality of pressure rollers abutting against the pressure receiving ring, and the plurality of pressure rollers are arranged in a ring shape.

[0011] According to some embodiments of the present application, the outer side of the one-way air inlet valve is threadedly mounted with a sealing cover.

[0012] According to some embodiments of the present application, one end of the conical gear ring is connected with a driving motor through meshing conical gears, and the driving motor is installed on the side wall of the lower film.

[0013] Compared with the prior art, the present application has the following beneficial effects: 1、The punch pushes the hole while synchronously extruding the pushing assembly, drives the pressure roller to trigger the gas pressure conduction assembly to divide the gas into the hole processing assembly through the gas channel, drives the sliding block to rotate the scraper with the base as the axis to cut burrs, realizes integrated punching and burr cleaning, does not need to rely on manual polishing, drum polishing and other traditional methods, reduces labor intensity, solves the problems of uneven hole wall roughness, workpiece deformation and high device maintenance cost, is suitable for batch production and improves processing efficiency and consistency; 2、The sealing cover of the one-way air inlet valve is disassembled to make the gas enter the second cavity and push the gas pressure push rod, the linkage makes the scraper form a specific inclination angle, and the rotation cutting completely cleans the hole edge burrs and directly forms a recessed surface, without additional secondary chamfering processing, avoiding the risk of hole center deviation that may occur in secondary chamfering, ensuring the thoroughness of burr cleaning and the processing quality of chamfering, reducing processing procedures, reducing errors and production cost.

[0014] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0016] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the cross-sectional structure of the sliding block of the present application; Figure 3 is a schematic diagram of the structure of the one-way air inlet valve of the present application; Figure 4 is a schematic diagram of the positional relationship between the base and the hole processing assembly of the present application; Figure 5 is a schematic diagram of the positional relationship between the pushing assembly and the gas pressure conduction assembly of the present application; Figure 6 is a schematic diagram of the arrangement of the pressure roller of the present application; Figure 7 is a schematic diagram of the structure of the gas pressure conduction assembly of the present application; Figure 8 is a schematic diagram of a front view of a sectional structure of the present application; Figure 9 is Figure 8 is an enlarged schematic diagram of A in the figure; Figure 10 is Figure 8 is an enlarged schematic diagram of B in the figure.

[0017] In the figure: 1, upper die; 11, punch; 12, pre-press spring; 2, lower die; 21, groove; 22, base; 23, base; 231, sliding groove; 232, first cavity; 233, limiting ring; 234, one-way air outlet valve; 235, third cavity; 236, limiting groove; 237, bearing; 24, pushing assembly; 241, plug-in barrel; 242, material lifting piece; 243, pressure roller; 25, air pressure transmission assembly; 251, telescopic push rod; 252, third air pressure block; 253, connecting rod; 254, pressure receiving ring; 26, hole processing assembly; 260, scraper; 261, sliding block; 262, extension rod; 263, first air pressure block; 264, one-way air inlet valve; 265, sealing cover; 266, air pressure channel; 267, second cavity; 268, air pressure push rod; 269, second air pressure block; 27, air channel; 28, conical gear ring; 281, conical gear; 282, driving motor. DETAILED DESCRIPTION

[0018] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0019] As Figures 1-10As shown, the present application provides a mold stamping device for accessory production, comprising an upper die 1 and a lower die 2; the inside of the upper die 1 is provided with a punch 11 and a plurality of pre-press springs 12 for positioning the stamped part; the top end of the lower die 2 is provided with a groove 21, the groove 21 is provided with a base 22, and the inside of the groove 21 is rotatably connected with a base 23; the base 22 is provided with a pushing assembly 24; the base 23 is provided with a gas pressure transmission assembly 25 and a hole processing assembly 26, the gas pressure transmission assembly 25 and the hole processing assembly 26 are communicated through an air duct 27, the air duct 27 is arranged in the inner cavity of the base 23, and the outer sidewall of the base 23 is provided with a conical tooth ring 28; the integration of stamping and burr cleaning is realized, the production efficiency of the accessory is improved, the positioning accuracy of the stamped part is ensured, the stamping deviation and the unqualified rate of the accessory are reduced, two cutting modes are adapted to different burr working conditions, the flatness of the accessory surface cutting is ensured, the protruding burr is thoroughly cleaned and the chamfering process is completed at the same time, the cost of subsequent separate chamfering process is saved, the mechanical running loss is reduced, and the service life of the device is prolonged.

[0020] Further, the top end of the base 23 is provided with a sliding groove 231, the sidewall of the base 23 is provided with a first cavity 232 communicated with the air duct 27, the inner bottom wall of the first cavity 232 is provided with a limiting ring 233, the base 23 is further provided with a one-way air outlet valve 234, the one-way air outlet valve 234 is communicated with the air duct 27, the other end of the air duct 27 is communicated with a third cavity 235, the sidewall of the base 23 is provided with a limiting groove 236, the limiting groove 236 is located at the top end of the third cavity 235, the center of the base 23 is provided with a bearing 237, and the bearing 237 is sleeved on the outer wall of the base 22; the gas in the air duct 27 is stably divided and transmitted, a stable gas pressure basis is provided for burr treatment, the scraping knife 260 is ensured to have uniform resistance and coherent cutting action, the base 23 is smoothly rotated, mechanical friction loss and energy consumption loss are reduced, the limiting structure can avoid structural deformation caused by excessive displacement of the parts, the precision of the cooperation of each component and the synergy of the action are improved, and the service life of the device is prolonged.

[0021] Further, the hole processing assembly 26 comprises a sliding block 261 and a scraper 260; the sliding block 261 is slidingly connected in the sliding groove 231, one end of the sliding block 261 is provided with an extension rod 262, one end of the extension rod 262 is slidingly inserted in the first cavity 232, and one end of the extension rod 262 is provided with a first air pressure block 263, one side of the first air pressure block 263 intermittently abuts against the limiting ring 233, the other end of the sliding block 261 is provided with a one-way air inlet valve 264 which is in plug-fit communication with the one-way air outlet valve 234, one end of the one-way air inlet valve 264 is in communication with an air pressure channel 266 which is formed in the interior of the sliding block 261, the other end of the air pressure channel 266 is in communication with a second cavity 267, the second cavity 267 is movably inserted with an air pressure push rod 268, one end of the air pressure push rod 268 is provided with a second air pressure block 269, one side of the second air pressure block 269 is connected with the inner side wall of the second cavity 267 through a spring, the other end of the air pressure push rod 268 is slidingly penetrated through the second cavity 267 and is hingedly connected on the side wall of the scraper 260; the scraper 260 can realize two modes of horizontal cutting or inclined angle cutting, which can not only process a small amount of surface burrs to ensure the flatness of the cutting surface, but also can completely clean the protruding burrs to form a concave surface, so as to provide a higher fitting space for fasteners (such as the head of a bolt or a screw), so that the surface is more closely fitted during assembly, and the overall assembly precision is improved; the subsequent chamfering process is omitted, the process circulation time is shortened, the investment cost of the device is saved, and the uniformity and controllability of the cutting force are realized by the stability of the air pressure drive and the protection effect of the limiting structure, so as to avoid excessive cutting or edge damage of the parts, and reduce the unqualified rate of production; the spring cooperates with the air pressure push rod 268 to realize automatic resetting of the angle of the scraper 260, so as to ensure the consistency and stability of repeated processing, and the components cooperate accurately and smoothly, so as to further improve the cleaning efficiency and processing quality of the burrs, and meet the hole burr processing needs of different materials (metal or plastic) and specifications of parts.

[0022] Further, the air pressure transmission assembly 25 comprises a telescopic push rod 251 which is slidingly inserted in the third cavity 235, one end of the telescopic push rod 251 is provided with a third air pressure block 252, the other end of the telescopic push rod 251 is provided with a connecting rod 253, the bottom end of the connecting rod 253 is connected with the bottom wall of the limiting groove 236 through a spring, the other end of the connecting rod 253 is provided with a pressure receiving ring 254; the mechanical pressure of the pushing assembly 24 is converted into stable air pressure to provide continuous power for the hole processing assembly 26, so as to ensure the continuity and reliability of the burr cutting action.

[0023] Further, the pushing assembly 24 comprises a plug-in barrel 241 arranged at the top end of the base 23, and the inner cavity of the plug-in barrel 241 is provided with a material pushing spring, the bottom end of the material pushing spring is installed at the top of the base 22, and the top end of the material pushing spring is provided with a material pushing piece 242, and the outer side wall of the material pushing piece 242 is provided with a plurality of pressure rollers 243 in contact with the pressure ring 254, and the plurality of pressure rollers 243 are arranged in a ring shape; the punching and material pushing are simultaneously realized, the consistency of the processing procedure is improved, and the ring-shaped pressure rollers 243 ensure that the air pressure transmission assembly 25 is uniformly stressed.

[0024] Further, the outer side of the one-way air inlet valve 264 is provided with a sealing cover 265 in a threaded manner; the working mode of the quick switching scraper 260 is convenient to operate, different burr cleaning requirements are adapted, and the universality of the device is improved.

[0025] Further, one end of the conical gear ring 28 is drivingly connected with a driving motor 282 through the meshing conical gear 281, and the driving motor 282 is installed on the side wall of the lower mold 2; the base 23 is provided with stable rotating power, the burr is uniformly and completely cut by the rotation of the scraper 260, and the machining precision of the edge of the accessory hole is improved.

[0026] Working principle: when punching, the punch 11 punches the surface of the accessory, the punch 11 penetrates the surface of the accessory, and the surface of the accessory forms a punching hole, as shown in Figure 1 The bottom of the mold after punching is provided with a burr; At this time, the punch 11 of the device extrudes the pushing assembly 24 when punching, the pushing assembly 24 moves towards the bottom, and the material pushing piece 242 in the pushing assembly 24 moves towards the bottom, which drives the pressure roller 243 to extrude the pressure ring 254, so that when the air pressure transmission assembly 25 moves towards the bottom, the gas in the third cavity 235 is respectively delivered into the one-way air outlet valve 234 and the first cavity 232 through the shunt of the air channel 27; At the same time, the driving motor 282 is started, the conical gear 281 and the conical gear ring 281 are driven to rotate by the power output end of the driving motor 282, and the base 23 is driven to rotate with the center of the base 22 as the center axis; The gas entering the first cavity 232 continuously accumulates, the internal pressure increases, the extension rod 262 and the sliding block 261 move in the sliding groove 231, and the top end of the scraper 260 is in contact with the burr at the bottom of the accessory hole at this time; The gas entering the one-way air outlet valve 234 can be selected according to the needs of burr cutting; The first kind of scraper 260 angle does not adjust the cutting burr: install the sealing cover 265 corresponding to the thread outside the one-way air inlet valve 264 on the one-way air inlet valve 264, at this time when the slider moves to contact the one-way air outlet valve 234, the one-way air outlet valve 234 is blocked by the sealing cover 265, the gas in the air passage cannot enter the one-way air inlet valve 264 through the one-way air outlet valve 234, so that the cutting angle of the scraper 260 cannot be adjusted when it approaches the burr; The scraper 260 can be horizontally rotated to cut the burr in the non-adjustment state, and the cutting surface is horizontal to the surface of the fitting for the case of less surface burr; The second kind of scraper 260 cutting angle adjustment: when the one-way air inlet valve 264 is not installed with the sealing cover 265, the slider 261 moves in the sliding groove 231 to the one-way air outlet valve 234, the one-way air inlet valve 264 contacts the one-way air outlet valve 234, the gas enters the air pressure channel 266 from the air channel 27, and enters the second cavity 267 along the air pressure channel 266, so that the air pressure in the second cavity 267 rises, and pushes the air pressure push rod 268, so that the scraper 260 can form a certain cutting inclination angle when rotating and cutting the burr, realize cutting the hole edge burr and more thoroughly clean the protruding burr, form a concave surface, and also solve the subsequent chamfering processing under the condition of thoroughly cleaning the burr, provide accommodation space for fasteners (such as the head of a bolt or a screw), and make the surface of the part flat.

[0027] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art in the technical range disclosed by the present application can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application, which should be covered in the protection scope of the present application.

Claims

1. A die stamping device for parts production, characterized in that, It comprises an upper die (1) and a lower die (2); The upper die (1) is internally provided with a punch (11) and a plurality of pre-press springs (12) for positioning the punched part; The top end of the lower die (2) is provided with a groove (21), the groove (21) is internally provided with a base (22), and the inner wall of the groove (21) is rotatably connected with a base (23); The base (22) is provided with a pushing assembly (24); the base (23) is provided with a gas pressure transmission assembly (25) and a hole processing assembly (26), the gas pressure transmission assembly (25) and the hole processing assembly (26) are communicated through an air channel (27), the air channel (27) is arranged in the inner cavity of the base (23), and the outer side wall of the base (23) is provided with a conical tooth ring (28).

2. The mold stamping device for accessory production according to claim 1, characterized by, The top end of the base (23) is provided with a sliding groove (231), the side wall of the base (23) is provided with a first cavity (232) communicated with the air channel (27), the inner bottom wall of the first cavity (232) is provided with a limiting ring (233), the base (23) is further provided with a one-way air outlet valve (234), the one-way air outlet valve (234) is communicated with the air channel (27), the other end of the air channel (27) is communicated with a third cavity (235), the side wall of the base (23) is provided with a limiting groove (236), the limiting groove (236) is located at the top end of the third cavity (235), and the center of the base (23) is provided with a bearing (237), the bearing (237) is sleeved on the outer wall of the base (22).

3. The mold stamping apparatus for accessory production according to claim 2, characterized by, The hole processing assembly (26) comprises a sliding block (261) and a scraper (260); The sliding block (261) is slidingly connected in the sliding groove (231), one end of the sliding block (261) is provided with an extension rod (262), one end of the extension rod (262) is slidingly inserted into the first cavity (232), one end of the extension rod (262) is provided with a first air pressure block (263), one side of the first air pressure block (263) is intermittently in contact with the limiting ring (233), the other end of the sliding block (261) is provided with a one-way air inlet valve (264) which is in plug-fit cooperation with the one-way air outlet valve (234), one end of the one-way air inlet valve (264) is communicated with an air pressure channel (266), the air channel (27) is arranged in the inner portion of the sliding block (261), the other end of the air pressure channel (266) is communicated with a second cavity (267), a gas pressure push rod (268) is movably inserted into the second cavity (267), one end of the gas pressure push rod (268) is provided with a second air pressure block (269), one side of the second air pressure block (269) is connected with the inner side wall of the second cavity (267) through a spring, and the other end of the gas pressure push rod (268) is slidingly penetrated through the second cavity (267) and hinged to the side wall of the scraper (260).

4. The mold stamping apparatus for accessory production according to claim 3, characterized by The air pressure conducting assembly (25) comprises a telescopic push rod (251) slidingly inserted into a third cavity (235), one end of the telescopic push rod (251) is provided with a third air pressure block (252), the other end of the telescopic rod is provided with a connecting rod (253), the bottom end of the connecting rod (253) is connected with the bottom wall of a limiting groove (236) through a spring, and the other end of the connecting rod (253) is provided with a pressure receiving ring (254).

5. The mold stamping apparatus for accessory production according to claim 4, characterized by The pushing assembly (24) comprises a plug-in barrel (241) arranged at the top end of the base (23), the inner cavity of the plug-in barrel (241) is provided with a pushing spring, the bottom end of the pushing spring is mounted on the top of the base (22), the top end of the pushing spring is provided with a pushing piece (242), and a plurality of pressure rollers (243) in contact with the pressure receiving ring (254) are arranged on the outer side wall of the pushing piece (242) in a ring-shaped arrangement.

6. The mold stamping apparatus for accessory production according to claim 3, wherein The outer side of the one-way air inlet valve (264) is provided with a sealing cover (265).

7. The mold stamping apparatus for accessory production according to claim 6, wherein One end of the conical gear ring (28) is drivingly connected with a driving motor (282) through a meshing conical gear (281), and the driving motor (282) is mounted on the side wall of the lower film.

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