A stamping die for processing hardware parts

Abstract

The present invention discloses a stamping die for hardware processing, which relates to the technical field of stamping dies. It includes a stamping workbench and a pressing plate. Connecting components are evenly installed on the stamping workbench and the pressing plate. A lower die is inserted in the central groove of the stamping workbench, and a concave-convex detection mechanism is fitted and installed directly below the lower die. An upper die is connected to the lower part of the pressing plate by bolts, and a distribution plate is arranged above the pressing plate. Pressure-sensitive oil cavities are evenly distributed below the distribution plate. In the present invention, when the upper and lower dies are pressed together, the downward pressure can be automatically distributed to different areas according to the concave-convex undulation of the die, so that the area with a larger pressing amplitude (corresponding to the concave-convex degree of the die) receives a larger hydraulic acting force, while the area with a smaller pressing amplitude (corresponding to the concave-convex degree of the die) receives a smaller hydraulic acting force, which has a long-term protection effect on the die and the hardware material, and avoids the influence on the precision.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping dies, and particularly to a stamping die for processing hardware parts. Background Art

[0002] A stamping die generally consists of three parts: an upper die, a lower die, and a guiding mechanism. Among them, the upper and lower dies mainly use the special shape of the combined cavity to stamp out the required material patterns. Generally, the lower die remains stationary, and the upper die is transmitted downward by the guiding mechanism and corresponds and fits with the lower die.

[0003] 1. The guiding columns are generally arranged at the edge of the die, and the hydraulic driving mechanism generally acts on the exact middle of the upper die. Long-term and frequent operation easily causes stress deformation of the upper die with a sunken center. At the same time, when the upper and lower dies are pressed together, since the unevenness is not regular and the pressure given by the driving mechanism is evenly distributed, some areas with smaller pressing amplitudes will also be subjected to relatively large hydraulic forces. Instead, the evenly distributed hydraulic forces cannot meet the material deformation in areas with larger pressing amplitudes. Over time, it is easy to limit the fitting accuracy of the die, and it is also easy to damage the die and the hardware material.

[0004] 2. The upper die is generally connected to the guiding columns in a sliding manner. When the die is frequently stamped, the upper die will also frequently rub against the guiding columns. Over time, the outer wall of the guiding columns and the inner wall of the circular groove of the die will both be worn, resulting in the inability of the upper die to slide stably with the guiding columns, and thus unable to ensure the high-precision correspondence between the descending upper die and the lower die.

[0005] In view of the above problems, there is an urgent need to innovate and design on the basis of the original stamping die for processing hardware parts. Summary of the Invention

[0006] The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single. Specifically, the purpose of the present invention is to provide a stamping die for processing hardware parts to solve the problems raised in the above background art, that is, the guiding columns are generally arranged at the edge of the die, and the hydraulic driving mechanism generally acts on the exact middle of the upper die. Long-term and frequent operation easily causes stress deformation of the upper die with a sunken center. At the same time, when the upper and lower dies are pressed together, since the unevenness is not regular and the pressure given by the driving mechanism is evenly distributed, some areas with smaller pressing amplitudes will also be subjected to relatively large hydraulic forces. Instead, the evenly distributed hydraulic forces cannot meet the material deformation in areas with larger pressing amplitudes. Over time, it is easy to limit the fitting accuracy of the die, and it is also easy to damage the die and the hardware material.

[0007] To achieve the above object, the present invention provides the following technical solution: A stamping die for hardware processing, including a stamping workbench and a pressing plate. Connecting components are evenly installed on the stamping workbench and the pressing plate. A lower die is inserted and arranged in the central groove of the stamping workbench. An unevenness detection mechanism is fitted and installed directly below the lower die. The upper die is connected to the lower part of the pressing plate by bolts. A distribution plate is arranged above the pressing plate. Pressure-sensitive oil cavities are evenly distributed below the distribution plate. A pressure-sensitive oil liquid distribution mechanism is installed between the pressing plate and the distribution plate;

[0008] The unevenness detection mechanism is connected to the pressure-sensitive oil cavity through a hose in a through manner.

[0009] Preferably, the connecting component is composed of two symmetrically and hinged rotating plates. The outer ends of the two rotating plates are respectively hinged to the pressing plate and the stamping workbench.

[0010] Preferably, the unevenness detection mechanism includes a base, an elastic telescopic rod and a sector-shaped support plate. A base is fixed directly below the lower die. Elastic telescopic rods are evenly arranged on the upper surface of the base. The telescopic upper ends of the elastic telescopic rods are fixed with sector-shaped support plates.

[0011] Preferably, the sector-shaped support plates are evenly arranged below the lower die, and all the sector-shaped support plates together form a circular structure.

[0012] Preferably, the pressure-sensitive oil liquid distribution mechanism includes a main hydraulic cylinder, a main hydraulic piston, an electric telescopic rod, a distribution pipe, a secondary hydraulic cylinder and a secondary hydraulic piston. A main hydraulic cylinder is fixed on the upper surface of the distribution plate. A main hydraulic piston is hermetically and slidably arranged inside the main hydraulic cylinder. The outer end of the main hydraulic piston is fixed with the telescopic end of the electric telescopic rod. The lower end of the electric telescopic rod is fixed on the mounting plate on the side of the stamping workbench. The outer wall of the main hydraulic cylinder is connected to the distribution pipe in a through manner at equal angles. Secondary hydraulic cylinders are evenly fixed on the lower surface of the distribution plate. The outer end of the distribution pipe is connected to the secondary hydraulic cylinder in a through manner. A secondary hydraulic piston is slidably arranged through the inside of the secondary hydraulic cylinder. The lower end of the secondary hydraulic piston is fixed on the upper surface of the pressing plate. The pressure-sensitive oil cavity is fixedly installed on the side of the secondary hydraulic cylinder and a pressure regulating component is installed inside.

[0013] Preferably, the pressure regulating component includes a sealing slide plate and a valve. A sealing slide plate is hermetically and slidably arranged inside the pressure-sensitive oil cavity. One side of the sealing slide plate is fixed with the other end of the valve. The other end of the valve respectively penetrates through the pressure-sensitive oil cavity and the secondary hydraulic cylinder and is arranged in a fitting manner at the liquid outlet of the distribution pipe.

[0014] Preferably, one side of the sealing slide plate is welded with one end of a spring, and the other end of the spring is fixed on the inner wall of the pressure-sensitive oil cavity.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] When stamping starts, the electric telescopic rod retracts and drives the piston end of the main hydraulic piston to fall along the inner wall of the main hydraulic cylinder, causing the oil in the main hydraulic cylinder to be introduced into the sub-hydraulic cylinders evenly distributed below through each distribution pipe. Since the outlet size of the distribution pipe in the sub-hydraulic cylinder is controlled by the convexity of the corresponding angle of the lower mold, the oil introduced into the sub-hydraulic cylinder per unit time is different, resulting in changes in the pressure exerted on each angle area of the pressure plate when each sub-hydraulic piston falls (the stroke is the same but the pressure exerted is different). Briefly analyzed, when the upper mold falls, the area with the highest convexity must contact the raw material plate of the hardware first. Therefore, the pressure plate area corresponding to this angle requires the highest pressure, and the pressure should be concentrated near this area. Based on the above, in the present invention, when the upper and lower molds are pressed together, they can automatically distribute the downward pressure to different areas according to the concave and convex conditions of the mold, so that the area with a larger pressure amplitude (corresponding to the concave and convex degree of the mold) receives a larger hydraulic force, while the area with a smaller pressure amplitude (corresponding to the concave and convex degree of the mold) receives a smaller hydraulic force, which has a long-term protective effect on the mold and the hardware material, avoiding the influence on precision. At the same time, the upper mold and the lower mold are connected in the form of multiple sets of connection components, and soft connection is achieved through two symmetrically hinged rotating plates, and still can play a role in limiting and guiding. Compared with the existing technology in which the guide is realized by the cooperation of the sliding sleeve and the guide post, it has a smaller frictional resistance, thus having a smaller influence on the hydraulic force at the edge of the pressure plate, further improving the distribution accuracy of the pressure plate pressure and further ensuring the precision of the mold after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front sectional structure schematic diagram of the present invention;

[0018] Figure 2 It is a top view mounting structure schematic diagram of the sector support plate of the present invention;

[0019] Figure 3 It is a top view mounting structure schematic diagram of the distribution plate of the present invention;

[0020] Figure 4 For the present invention Figure 1 The enlarged structure schematic diagram at A in;

[0021] Figure 5 It is a three-dimensional structure schematic diagram of the elastic telescopic rod and the sector support plate of the present invention;

[0022] Figure 6 It is a three-dimensional structure schematic diagram of the sector support plate after adaptive deformation of the present invention;

[0023] Figure 7 It is a first three-dimensional structure schematic diagram of the pressure-sensitive oil distribution mechanism of the present invention;

[0024] Figure 8 This is the second three-dimensional structural schematic diagram of the pressure-sensitive oil distribution mechanism of the present invention.

[0025] In the figure: 1, stamping workbench; 11, connecting component; 2, lower die; 3, base; 31, elastic telescopic rod; 32, fan-shaped support plate; 4, pressing plate; 5, upper die; 6, distribution plate; 61, main hydraulic cylinder; 62, main hydraulic piston; 63, electric telescopic rod; 64, distribution pipe; 65, auxiliary hydraulic cylinder; 66, auxiliary hydraulic piston; 7, pressure-sensitive oil cavity; 71, sealing slide plate; 72, spring; 73, valve. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1-8 , the present invention provides a technical solution: a stamping die for hardware processing, including a stamping workbench 1 and a pressing plate 4. Connecting components 11 are evenly installed on the stamping workbench 1 and the pressing plate 4, and a lower die 2 is inserted into the central groove of the stamping workbench 1. And an uneven detection mechanism is fitted and installed directly below the lower die 2. The upper die 5 is bolted below the pressing plate 4, and a distribution plate 6 is arranged above the pressing plate 4. Pressure-sensitive oil cavities 7 are equally distributed below the distribution plate 6, and a pressure-sensitive oil distribution mechanism is installed between the pressing plate 4 and the distribution plate 6;

[0028] The uneven detection mechanism is connected to the pressure-sensitive oil cavity 7 through a hose in a through manner.

[0029] The connecting component 11 is composed of two symmetrically and hinged rotating plates, and the outer ends of the two rotating plates are respectively hinged to the pressing plate 4 and the stamping workbench 1.

[0030] The uneven detection mechanism includes a base 3, an elastic telescopic rod 31 and a fan-shaped support plate 32. A base 3 is fixed directly below the lower die 2. Elastic telescopic rods 31 are equally arranged on the upper surface of the base 3, and a fan-shaped support plate 32 is fixed to the telescopic upper end of the elastic telescopic rod 31.

[0031] The fan-shaped support plates 32 are equally arranged below the lower die 2, and all the fan-shaped support plates 32 together form a circular structure.

[0032] The pressure-sensitive oil distribution mechanism includes a main hydraulic cylinder 61, a main hydraulic piston 62, an electric telescopic rod 63, a distribution pipe 64, a secondary hydraulic cylinder 65 and a secondary hydraulic piston 66. The upper surface of the distribution plate 6 is fixedly provided with the main hydraulic cylinder 61. The main hydraulic piston 62 is hermetically and slidably arranged inside the main hydraulic cylinder 61. The outer end of the main hydraulic piston 62 is fixedly provided with the telescopic end of the electric telescopic rod 63. The lower end of the electric telescopic rod 63 is fixedly arranged on the mounting plate on the side of the stamping workbench 1. The outer wall of the main hydraulic cylinder 61 is connected with the distribution pipe 64 through holes at equal angles. The lower surface of the distribution plate 6 is fixedly provided with the secondary hydraulic cylinders 65 at equal angles. The outer end of the distribution pipe 64 is hermetically connected with the secondary hydraulic cylinder 65. The secondary hydraulic piston 66 is slidably arranged through the secondary hydraulic cylinder 65. The lower end of the secondary hydraulic piston 66 is fixedly arranged on the upper surface of the pressing plate 4. The pressure-sensitive oil chamber 7 is fixedly installed on the side of the secondary hydraulic cylinder 65 and a pressure regulating component is installed inside it.

[0033] The pressure regulating component includes a sealing slide plate 71 and a valve 73. The sealing slide plate 71 is hermetically and slidably arranged inside the pressure-sensitive oil chamber 7. One side of the sealing slide plate 71 is fixedly provided with the other end of the valve 73. The other end of the valve 73 respectively penetrates through the pressure-sensitive oil chamber 7 and the secondary hydraulic cylinder 65 and is arranged in a fitting manner at the liquid outlet of the distribution pipe 64.

[0034] One side of the sealing slide plate 71 is welded with one end of a spring 72, and the other end of the spring 72 is fixedly arranged on the inner wall of the pressure-sensitive oil chamber 7.

[0035] Working principle: When using the stamping die for hardware processing, first, as Figure 1 shown, place the lower die 2 in the groove at the center of the stamping workbench 1 in a fitting manner, and make the rectangular edge of the lower die 2 engage with the rectangular groove of the stamping workbench 1 to keep the lower die 2 stable. At the same time, install the upper die 5 corresponding to the lower die 2 on the lower surface of the pressing plate 4 through bolts. Finally, place the hardware raw material plate to be stamped and formed on the upper surface of the lower die 2.

[0036] When the lower die 2 is placed in the stamping workbench 1 in a fitting manner, under the self-weight of the lower die 2, the protrusions at the lower end of the lower die 2 will exert a downward and separate pushing force on the sector-shaped support plates 32 at corresponding angles, so that the circular combination that was originally on the same plane will fall at various angles to adapt to the depth and angle of the protrusions of the lower die 2. For comparison, see Figure 5 and Figure 6 . At the same time, when the sector-shaped support plate 32 at a certain angle falls, it will be realized through the expansion and contraction of the elastic telescopic rod 31, and when it falls, the oil liquid inside the elastic telescopic rod 31 will be pressed through the hose to the pressure-sensitive oil chamber 7 at the corresponding angle above. After the oil pressure inside the pressure-sensitive oil chamber 7 increases, it will horizontally push the sealing slide plate 71 adaptively, making the sealing slide plate 71 slide horizontally and stretch the spring 72. At the same time, as Figure 4The shown sealing slide plate 71 drives the valve 73 through the secondary hydraulic cylinder 65, so that the shielding of the liquid outlet of the distribution pipe 64 by the valve 73 is gradually increased. That is to say, the fan-shaped support plates 32 arranged at various angles at the lower end are used to adapt to and detect the convexity of the upper and lower dies 2 at the corresponding angles, and the size of the liquid outlet of the distribution pipe 64 at the corresponding angle is adjusted by means of pressure induction.

[0037] When the stamping starts, the electric telescopic rod 63 retracts and drives the piston end of the main hydraulic piston 62 to fall along the inner wall of the main hydraulic cylinder 61, so that the oil in the main hydraulic cylinder 61 is respectively introduced into the secondary hydraulic cylinders 65 distributed at equal angles below through the distribution pipes 64. Since the size of the liquid outlet of the distribution pipe 64 in the secondary hydraulic cylinder 65 is controlled by the convexity of the corresponding angle of the lower die 2, the oil introduced into the secondary hydraulic cylinder 65 per unit time is different. As a result, when each secondary hydraulic piston 66 falls, the pressure action on each angle area of the pressure plate 4 changes (the stroke is the same but the pressure action is different). Briefly analyzed, when the upper die 5 falls, the area with the highest convexity must contact the hardware raw material plate first. Therefore, the area of the pressure plate 4 corresponding to this angle requires the highest pressure, and the pressure should be concentrated near this area. Based on the above, in the present invention, when the upper and lower dies are pressed together, the downward pressure can be automatically distributed to different areas according to the concave and convex conditions of the die, so that the area with a larger pressing amplitude (corresponding to the concave and convex degree of the die) receives a larger hydraulic force, while the area with a smaller pressing amplitude (corresponding to the concave and convex degree of the die) receives a smaller hydraulic force, which has a long-term protection effect on the die and the hardware material, avoids the influence on the accuracy, and at the same time, the upper die 5 and the lower die 2 are connected in the form of multiple sets of connecting components 11. The soft connection is realized through two symmetrically hinged rotating plates, and still can play a role in limiting and guiding. Compared with the prior art in which the guiding is realized by the cooperation of the sliding sleeve and the guiding column, it has a smaller frictional resistance, so the influence on the hydraulic force at the edge of the pressure plate 4 is smaller, further improving the distribution accuracy of the pressure on the pressure plate 4 and further ensuring the accuracy of the die after long-term use.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stamping die for processing hardware parts, comprising a stamping workbench (1) and a pressing plate (4), characterized in that: The stamping workbench (1) and the pressing plate (4) are evenly equipped with connecting components (11). A lower die (2) is inserted and arranged at the central groove of the stamping workbench (1). And an unevenness detection mechanism is fitted and installed directly below the lower die (2). The upper die (5) is connected to the lower side of the pressing plate (4) by bolts. And a distribution plate (6) is arranged above the pressing plate (4). Pressure-sensitive oil cavities (7) are evenly distributed below the distribution plate (6). And a pressure-sensitive oil distribution mechanism is installed between the pressing plate (4) and the distribution plate (6). The unevenness detection mechanism is connected to the pressure-sensitive oil cavity (7) through a hose. The unevenness detection mechanism includes a base (3), elastic telescopic rods (31) and a sector-shaped support plate (32). And the base (3) is fixed directly below the lower die (2). Elastic telescopic rods (31) are evenly arranged on the upper surface of the base (3). And the telescopic upper ends of the elastic telescopic rods (31) are fixed with the sector-shaped support plate (32). It also includes a pressure adjustment component. The pressure adjustment component includes a sealing slide plate (71) and a valve (73). And the sealing slide plate (71) is slidably arranged in a sealed manner inside the pressure-sensitive oil cavity (7). One end of the valve (73) is fixed to one side of the sealing slide plate (71). And the other end of the valve (73) respectively penetrates through the pressure-sensitive oil cavity (7) and the auxiliary hydraulic cylinder (65) and is arranged in a fitting manner at the liquid outlet of the distribution pipe (64). The pressure-sensitive oil distribution mechanism includes a main hydraulic cylinder (61), a main hydraulic piston (62), an electric telescopic rod (63), a distribution pipe (64), an auxiliary hydraulic cylinder (65) and an auxiliary hydraulic piston (66). And the main hydraulic cylinder (61) is fixed on the upper surface of the distribution plate (6). And the main hydraulic piston (62) is slidably arranged in a sealed manner inside the main hydraulic cylinder (61). And the outer end of the main hydraulic piston (62) is fixed to the telescopic end of the electric telescopic rod (63). The lower end of the electric telescopic rod (63) is fixed on the mounting plate on the side of the stamping workbench (1). And the outer wall of the main hydraulic cylinder (61) is evenly connected with the distribution pipes (64) in a penetrating manner. The auxiliary hydraulic cylinders (65) are evenly fixed on the lower surface of the distribution plate (6). And the outer ends of the distribution pipes (64) are connected to the auxiliary hydraulic cylinders (65) in a penetrating manner. The auxiliary hydraulic piston (66) penetrates and slides inside the auxiliary hydraulic cylinder (65). And the lower end of the auxiliary hydraulic piston (66) is fixed on the upper surface of the pressing plate (4). The pressure-sensitive oil cavity (7) is fixedly installed on the side of the auxiliary hydraulic cylinder (65) and a pressure adjustment component is installed inside.

2. The stamping die for processing hardware parts according to claim 1, wherein: The connecting component (11) consists of two symmetrically and hinged rotating plates. The outer ends of the two rotating plates are respectively hinged to the pressing plate (4) and the stamping workbench (1).

3. A stamping die for processing hardware parts according to claim 1, characterized in that: The sector-shaped support plates (32) are evenly arranged below the lower die (2). And all the sector-shaped support plates (32) together form a circular structure.

4. A stamping die for processing hardware parts according to claim 1, characterized in that: One side of the sealing slide plate (71) is welded to one end of a spring (72). And the other end of the spring (72) is fixed to the inner wall of the pressure-sensitive oil cavity (7).

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