Stamping die for hardware machining

Abstract

The stamping die for hardware machining relates to the technical field of stamping dies and comprises a stamping workbench and a pressing plate, connecting assemblies are evenly installed on the stamping workbench and the pressing plate, a lower die is arranged at a center groove of the stamping workbench in an inserted mode, and a concave-convex detection mechanism is installed under the lower die in an attached mode. A pressing plate is arranged below the upper die, an upper die is connected under the pressing plate through a bolt, a distribution plate is arranged above the pressing plate, and pressure sensing oil cavities are distributed below the distribution plate at equal angles. When the upper die and the lower die are in press fit, downward pressure can be automatically distributed to different areas according to the concave-convex fluctuation condition of a grinding tool; by means of the technical scheme, the area with the large pressing amplitude (corresponding to the concave-convex degree of the die) is subjected to large hydraulic acting force, the area with the small pressing amplitude (corresponding to the concave-convex degree of the die) is subjected to small hydraulic acting force, the long-term protection effect on the die and hardware materials is achieved, and the precision is prevented from being affected.

Description

Technical Field

[0001] The invention relates to the technical field of stamping dies, in particular to a stamping die for processing hardware. Background Art

[0002] The stamping die is generally composed of three parts: the upper die, the lower die and the guide mechanism. The upper and lower die mainly utilize the special form of the combined cavity to stamp out the required material style. Generally, the lower die remains stationary, and the upper die is transmitted downward by the guide mechanism and corresponds to the lower die.

[0003] 1. The guide pillar is usually set at the edge of the mold, and the hydraulic drive mechanism usually acts on the middle of the upper mold. Long-term and frequent operation can easily lead to stress deformation of the upper mold with a concave center. At the same time, when the upper and lower molds are pressed together, the unevenness is irregular and the pressure given by the drive mechanism is flat, so some areas with smaller pressing amplitudes are also subject to larger hydraulic forces. On the contrary, the evenly distributed hydraulic force cannot meet the material deformation of the area with larger pressing amplitude. In the long run, the mold matching accuracy is easily limited, and the mold and hardware materials are easily damaged;

[0004] 2. The upper mold is generally connected to the guide column by a sliding connection. When the mold is frequently stamped, friction will frequently occur between the upper mold and the guide column. Over time, the outer wall of the guide column and the inner wall of the mold circular groove will be worn, resulting in the upper mold and the guide column being unable to slide stably, and thus unable to ensure high-precision correspondence between the falling upper mold and the lower mold.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original stamping dies for hardware processing. Summary of the invention

[0006] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide a stamping die for hardware processing, so as to solve the problem that the guide pillars are generally set at the edge of the die, and the hydraulic drive mechanism generally acts on the middle of the upper die. Long-term and frequent operation can easily cause stress deformation of the upper die with a concave center. At the same time, when the upper and lower dies are pressed together, the convex and concave surfaces are irregular and the pressure applied by the drive mechanism is flat, so some areas with smaller pressing amplitudes are also subject to larger hydraulic forces. On the contrary, the evenly distributed hydraulic force cannot meet the material deformation in the areas with larger pressing amplitudes. In the long run, the mold matching accuracy is limited, and the mold and hardware materials are easily damaged.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stamping die for hardware processing, comprising a stamping workbench and a pressing plate, the stamping workbench and the pressing plate are evenly equipped with connecting components, and a lower die is inserted and arranged at 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 directly below the pressing plate by bolts, and a distribution plate is arranged above the pressing plate, pressure-sensitive oil chambers are distributed at equal angles below the distribution plate, and a pressure-sensitive oil distribution mechanism is installed between the pressing plate and the distribution plate;

[0008] The concave-convex detection mechanism is connected with the pressure-sensitive oil cavity through a hose.

[0009] Preferably, the connecting assembly is composed of two symmetrical rotating plates which are hinged to each other, and the outer ends of the two rotating plates are hinged to the pressing plate and the stamping workbench respectively.

[0010] Preferably, the concave-convex detection mechanism includes a base, an elastic telescopic rod and a fan-shaped support plate, and the base is fixed directly below the lower mold, the upper surface of the base is provided with elastic telescopic rods at equal angles, and the fan-shaped support plate is fixed to the telescopic upper end of the elastic telescopic rod.

[0011] Preferably, the fan-shaped support plates are arranged at equal angles below the lower mold, and all the fan-shaped support plates together form a circular structure.

[0012] Preferably, the pressure-sensitive oil 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, and the main hydraulic cylinder is fixed to the upper surface of the distribution plate, and the main hydraulic piston is sealingly and slidingly arranged inside the main hydraulic cylinder, and the telescopic end of the electric telescopic rod is fixed to the outer end of the main hydraulic piston, the lower end of the electric telescopic rod is fixed to the mounting plate on the side of the stamping workbench, and the outer wall of the main hydraulic cylinder is connected with the distribution pipe at an equal angle, the lower surface of the distribution plate is fixed with a secondary hydraulic cylinder at an equal angle, and the outer end of the distribution pipe is connected with the secondary hydraulic cylinder, the interior of the secondary hydraulic cylinder is slidably penetrated by a secondary hydraulic piston, and the lower end of the secondary hydraulic piston is fixed to the upper surface of the pressure plate, and the pressure-sensitive oil chamber is fixedly installed on the side of the secondary hydraulic cylinder and a pressure regulating component is installed inside.

[0013] Preferably, the pressure regulating assembly includes a sealing slide and a valve, and a sealing slide is provided in a sealed sliding manner inside the pressure-sensitive oil chamber, the other end of the valve is fixed to one side of the sealing slide, and the other end of the valve respectively penetrates the pressure-sensitive oil chamber and the auxiliary hydraulic cylinder and is fitted on the liquid outlet of the distribution pipe.

[0014] Preferably, one end of a spring is welded to one side of the sealing slide plate, and the other end of the spring is fixed to the inner wall of the pressure-sensing oil chamber.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[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, so that the oil inside the main hydraulic cylinder is respectively introduced from each distribution pipe into the auxiliary hydraulic cylinders distributed at equal angles below. Since the size of the liquid outlet of the distribution pipe in the auxiliary hydraulic cylinder is controlled by the convexity of the lower mold at the corresponding angle, the oil distributed into the auxiliary hydraulic cylinder per unit time is different, so that the pressure effect of each auxiliary hydraulic piston on the area of ​​each angle of the pressure plate changes when it falls (the stroke is the same but the pressure effect is different). A simple analysis is that when the upper mold falls, the area with the highest convexity must be the first to contact the hardware raw material plate. 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, the upper and lower molds in the present invention are pressed At the same time, it can automatically distribute the downward pressure to different areas according to the undulations of the mold, so that the area with a larger pressure amplitude (corresponding to the degree of mold convexity) is subjected to a larger hydraulic force, while the area with a smaller pressure amplitude (corresponding to the degree of mold convexity) is subjected to a smaller hydraulic force, which has a long-term protective effect on the mold and hardware materials and avoids the accuracy being affected. At the same time, the upper mold and the lower mold are connected in the form of multiple groups of connecting components, and a soft connection is achieved through two symmetrically hinged rotating plates, and it can still play a limiting guiding role. Compared with the guiding method of the prior art in which the sliding sleeve and the guide column cooperate to achieve guidance, it has smaller friction resistance, thereby having less influence on the hydraulic force on the edge of the pressure plate, further improving the distribution accuracy of the pressure plate and further ensuring the accuracy of the mold after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram of the installation structure of the fan-shaped support plate of the present invention from a top view;

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

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

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

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

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

[0024] Figure 8 It is a 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 assembly; 2. lower mold; 3. base; 31. elastic telescopic rod; 32. fan-shaped support plate; 4. pressure plate; 5. upper mold; 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-sensing oil chamber; 71. sealing slide plate; 72. spring; 73. valve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-8 The present invention provides a technical solution: a stamping die for hardware processing, comprising a stamping workbench 1 and a pressing plate 4, the stamping workbench 1 and the pressing plate 4 are evenly installed with a connecting assembly 11, and a lower die 2 is inserted and installed at the central groove of the stamping workbench 1, and a concave-convex detection mechanism is installed just below the lower die 2, an upper die 5 is connected by bolts just below the pressing plate 4, and a distribution plate 6 is arranged above the pressing plate 4, and pressure-sensitive oil chambers 7 are distributed at equal angles 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 concave-convex detection mechanism is connected to the pressure-sensitive oil chamber 7 through a hose.

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

[0030] The concave-convex detection mechanism includes a base 3, an elastic telescopic rod 31 and a fan-shaped support plate 32, and the base 3 is fixed directly below the lower mold 2, the elastic telescopic rod 31 is arranged at equal angles on the upper surface of the base 3, and the 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 arranged at equal angles below the lower mold 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, and the main hydraulic cylinder 61 is fixed on the upper surface of the distribution plate 6, and the main hydraulic piston 62 is sealingly and slidably arranged inside the main hydraulic cylinder 61, and the outer end of the main hydraulic piston 62 is fixed with the telescopic end of the electric telescopic rod 63, and the lower end of the electric telescopic rod 63 is fixed to the mounting plate on the side of the stamping workbench 1, and the outer wall of the main hydraulic cylinder 61 is connected with the distribution pipe 64 at an equal angle, the lower surface of the distribution plate 6 is fixed with the secondary hydraulic cylinder 65 at an equal angle, and the outer end of the distribution pipe 64 is connected with the secondary hydraulic cylinder 65, the interior of the secondary hydraulic cylinder 65 is slidably penetrated by the secondary hydraulic piston 66, and the lower end of the secondary hydraulic piston 66 is fixed to the upper surface of the pressing plate 4, and 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.

[0033] The pressure regulating assembly includes a sealing slide 71 and a valve 73, and the sealing slide 71 is provided in a sealed sliding manner inside the pressure-sensitive oil chamber 7, the other end of the valve 73 is fixed to one side of the sealing slide 71, and the other end of the valve 73 respectively penetrates the pressure-sensitive oil chamber 7 and the auxiliary hydraulic cylinder 65 and is fitted in the liquid outlet of the distribution pipe 64.

[0034] One end of a spring 72 is welded to one side of the sealing slide plate 71 , and the other end of the spring 72 is fixed to the inner wall of the pressure-sensing oil chamber 7 .

[0035] Working principle: When using the stamping die for hardware processing, first Figure 1 As shown, the lower mold 2 is placed in the groove at the center of the stamping workbench 1, and the rectangular edge of the lower mold 2 is engaged in the rectangular groove of the stamping workbench 1 to keep the lower mold 2 stable. At the same time, the upper mold 5 corresponding to the lower mold 2 is installed on the lower surface of the pressing plate 4 by bolts, and finally the hardware raw material plate to be stamped is placed on the upper surface of the lower mold 2.

[0036] When the lower mold 2 is placed in the stamping workbench 1, the protrusion at the lower end of the lower mold 2 will produce a downward push action at the corresponding angle of the fan-shaped support plate 32 under the gravity of the lower mold 2, so that the circular combination originally on the same surface will fall at various angles to adapt to the depth and angle of the protrusion of the lower mold 2. Figure 5 and Figure 6 At the same time, when the fan-shaped support plate 32 at a certain angle falls, it will be realized by the expansion and contraction of the elastic telescopic rod 31 and the oil 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 adaptively push the sealing slide plate 71 horizontally, so that the sealing slide plate 71 slides horizontally and stretches the spring 72. At the same time, Figure 4The sealing slide plate 71 shown will drive the valve 73 to penetrate the auxiliary hydraulic cylinder 65, so that the valve 73 gradually increases the blocking of the liquid outlet of the distribution pipe 64. In other words, the fan-shaped support plates 32 arranged at various angles at the lower end are used to adapt to and detect the protrusion degree of the upper and lower molds 2 at the corresponding angles and use pressure sensing to adjust the size of the liquid outlet of the distribution pipe 64 at the corresponding angle.

[0037] When 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 inside the main hydraulic cylinder 61 is respectively introduced from each distribution pipe 64 into the auxiliary hydraulic cylinder 65 distributed at equal angles below. Since the size of the outlet of the distribution pipe 64 in the auxiliary hydraulic cylinder 65 is controlled by the convexity of the corresponding angle of the lower mold 2, the oil distributed into the auxiliary hydraulic cylinder 65 per unit time is different, so that the pressure effect of each auxiliary hydraulic piston 66 on the area of ​​each angle of the pressure plate 4 changes when it falls (the stroke is the same but the pressure effect is different). A simple analysis is that when the upper mold 5 falls, the area with the highest convexity must be the first to contact the hardware raw material plate. 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, this In the present invention, the upper and lower molds can automatically distribute the downward pressure to different areas according to the convex and concave conditions of the mold when pressed together, so that the area with a larger pressing amplitude (corresponding to the degree of mold convexity) is subjected to a larger hydraulic force, while the area with a smaller pressing amplitude (corresponding to the degree of mold convexity) is subjected to a smaller hydraulic force, which has a long-term protective effect on the mold and hardware materials and avoids the accuracy from being affected. At the same time, the upper mold 5 and the lower mold 2 are connected in the form of multiple groups of connecting components 11, and a soft connection is achieved through two symmetrically hinged rotating plates, and it can still play a limiting guiding role. Compared with the guiding method of the prior art in which the sliding sleeve and the guide column cooperate to achieve guidance, it has smaller friction resistance, thereby having less influence on the hydraulic force on the edge of the pressing plate 4, further improving the distribution accuracy of the pressure of the pressing plate 4 and further ensuring the accuracy of the mold after long-term use.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stamping die for hardware processing, comprising a stamping workbench (1) and a pressing plate (4), characterized in that: The punching workbench (1) and the pressing plate (4) are evenly equipped with connecting components (11), and a lower mold (2) is inserted into the central groove of the punching workbench (1), and a concave-convex detection mechanism is installed directly below the lower mold (2), and an upper mold (5) is connected to the pressing plate (4) by bolts directly below the pressing plate (4), and a distribution plate (6) is arranged above the pressing plate (4), and pressure-sensitive oil chambers (7) are distributed at equal angles 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 concave-convex detection mechanism is connected to the pressure-sensitive oil chamber (7) via a hose.

2. A stamping die for hardware processing according to claim 1, characterized in that: The connection assembly (11) is composed of two symmetrical rotating plates that are hinged to each other, and the outer ends of the two rotating plates are hinged to the pressing plate (4) and the stamping workbench (1) respectively.

3. The stamping die for hardware processing according to claim 1, characterized in that: The concave-convex detection mechanism comprises a base (3), an elastic telescopic rod (31) and a fan-shaped support plate (32), and the base (3) is fixed directly below the lower mold (2), the upper surface of the base (3) is provided with elastic telescopic rods (31) at equal angles, and the fan-shaped support plate (32) is fixed to the telescopic upper end of the elastic telescopic rod (31).

4. A stamping die for hardware processing according to claim 3, characterized in that: The fan-shaped support plates (32) are arranged at equal angles below the lower mold (2), and all the fan-shaped support plates (32) together form a circular structure.

5. The stamping die for hardware processing according to claim 1, characterized in that: The pressure-sensitive oil distribution mechanism comprises 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), wherein the main hydraulic cylinder (61) is fixed on the upper surface of the distribution plate (6), and the main hydraulic piston (62) is provided in a sealing and sliding manner inside the main hydraulic cylinder (61), and the telescopic end of the electric telescopic rod (63) is fixed to the outer end of the main hydraulic piston (62), and the lower end of the electric telescopic rod (63) is fixed to the side of the stamping workbench (1). The distribution plate (6) is mounted on the mounting plate on the side, and the outer wall of the main hydraulic cylinder (61) is connected with a distribution pipe (64) at an equal angle, the lower surface of the distribution plate (6) is fixed with an auxiliary hydraulic cylinder (65) at an equal angle, and the outer end of the distribution pipe (64) is connected with the auxiliary hydraulic cylinder (65), the interior of the auxiliary hydraulic cylinder (65) is slidably penetrated by an auxiliary hydraulic piston (66), and the lower end of the auxiliary hydraulic piston (66) is fixed to the upper surface of the pressure plate (4), and the pressure sensing oil chamber (7) is fixedly mounted on the side of the auxiliary hydraulic cylinder (65) and a pressure regulating component is installed inside.

6. A stamping die for hardware processing according to claim 5, characterized in that: The pressure regulating assembly comprises a sealing slide plate (71) and a valve (73), and the sealing slide plate (71) is provided in a sealed sliding manner inside the pressure-sensitive oil chamber (7), the other 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 the pressure-sensitive oil chamber (7) and the auxiliary hydraulic cylinder (65) and is closely arranged at the liquid outlet of the distribution pipe (64).

7. The stamping die for hardware processing according to claim 5, characterized in that: One end of a spring (72) is welded to one side of the sealing slide plate (71), and the other end of the spring (72) is fixed to the inner wall of the pressure-sensing oil chamber (7).

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