Drawing die with pneumatic time-delay back-jacking mechanism

Abstract

The utility model relates to a drawing die with a pneumatic delay back-jacking mechanism, and belongs to the technical field of die manufacturing. The device structurally comprises a lower die base, lower die base material cores, an upper die base and upper die material pressing cores, the lower end of the non-working position of each upper die material pressing core is connected with an upper die back-jacking insert, a lower die back-jacking insert is arranged at the corresponding position below the upper die back-jacking insert, and the side end face of the lower die back-jacking insert is connected with a piston rod of a jacking air cylinder. An air cylinder seat of the jacking air cylinder is fixedly connected to the lower die base material core, and an air cylinder pipeline for controlling the jacking air cylinder is connected with an external air control system. According to the drawing die with the pneumatic delay back-jacking mechanism, the delay function of a delay nitrogen cylinder can be effectively replaced, the manufacturing cost is saved, and repair and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to a drawing die with a pneumatic time-delay return mechanism, belonging to the technical field of die manufacturing. Background Art

[0002] As the mold industry continues to prioritize cost control and demand higher quality for mold precision and parts, equipment is often required to meet the requirements of continuous production while ensuring operational stability and rapid changeover. Existing mold delay return mechanisms typically utilize nitrogen cylinders, but these are expensive, resulting in high equipment costs and a loss of market competitiveness.

[0003] In order to adopt other structures to replace the delayed nitrogen cylinder, different manufacturers have developed different delayed return mechanisms, but their structures are complex, not only the processing technology is complicated, but also requires frequent repairs and maintenance, which not only wastes manpower, but also easily leads to shutdowns and production stops, affecting product production efficiency. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a drawing die with a pneumatic time-delay return mechanism, which can effectively replace the delay function of the delayed nitrogen cylinder, not only saving manufacturing costs but also facilitating repair and maintenance.

[0005] In order to solve the above problems, the specific technical solution of the utility model is as follows: a drawing die with a pneumatic delayed return mechanism, comprising a lower die base, a lower die base core, an upper die base and an upper die pressing core, an upper die return insert being connected to the lower end of each upper die pressing core in the non-working position, a lower die return insert being provided at a corresponding position below the upper die return insert, the side end face of the lower die return insert being connected to the piston rod of the lifting cylinder, and the cylinder base of the lifting cylinder being fixedly connected to the lower die base core, and the cylinder pipeline for controlling the lifting cylinder being connected to an external air control system.

[0006] The contact surface between the upper die top return insert and the lower die top return insert is a wedge surface.

[0007] A plurality of vertical cavities are provided in the upper die base, an upper die nitrogen cylinder is provided on the top of the vertical cavity, and the lower part of the upper die nitrogen cylinder is connected to the upper die pressing core.

[0008] The bottom of the upper die pressing core contacts the upper surface of the formed part, a groove is provided on the bottom surface of the upper die pressing core, and the upper die return top insert is located in the groove.

[0009] A sensor is provided on the moving stroke of the lower die top return insert, and the sensor is positioned on the upper surface of the lower die seat material core.

[0010] The upper surface of the lower die base is connected to the lower die base material core through the lower die nitrogen cylinder. There is a groove on the upper surface of the lower die base, and the outer periphery of the groove is connected to the guide slide. The outer surface of the pressure ring is slidably connected to the guide slide, and the inner surface is connected to the lower die base material core.

[0011] The drawing die with a pneumatic delayed return mechanism of the present application adopts the above structure and has the following advantages:

[0012] 1. The cylinder is used to drive the wedge block to move. Compared with the expensive delayed nitrogen cylinder, it not only greatly reduces the mold cost, but also facilitates the replacement of standard parts in the later maintenance;

[0013] 2. The processing technology of the upper die return top insert and the lower die return top insert is simple, the debugging and production are convenient, and the operation is stable;

[0014] 3. The connection between the lifting cylinder and the lower die return insert is set, which not only ensures the safety and stability of the equipment, but also saves some sensors, facilitates mold debugging and improves the work efficiency of equipment production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the drawing die with a pneumatic delayed return mechanism.

[0016] Figure 2 for Figure 1 Partial schematic diagram of point A. DETAILED DESCRIPTION

[0017] like Figure 1 and Figure 2 As shown, a drawing die with a pneumatic delayed return mechanism includes a lower die base 1, a lower die base core 12, an upper die base 8 and an upper die pressing core 9. The lower end of each upper die pressing core 9 in the non-working position is connected to an upper die return insert 7, and a lower die return insert 6 is provided at a corresponding position below the upper die return insert 7. The side end surface of the lower die return insert 6 is connected to the piston rod of the lifting cylinder 5, and the cylinder base of the lifting cylinder 5 is fixedly connected to the lower die base core 12. The cylinder pipeline 4 that controls the lifting cylinder 5 is connected to the external air control system. The contact surface between the upper die return insert 7 and the lower die return insert 6 is a wedge surface. The lower die return insert 6 is driven by the lifting cylinder 5 to gradually contact the upper die return insert 7 and lift the upper die return insert 7, thereby realizing the delayed lifting of the upper die pressing core 9.

[0018] The upper die base 8 is provided with a number of vertical cavities, and the top of the vertical cavity is provided with an upper die nitrogen cylinder 10, and the lower part of the upper die nitrogen cylinder 10 is connected to the upper die pressing core 9. The bottom of the upper die pressing core 9 is in contact with the upper surface of the molded part, and a groove is provided on the bottom surface of the upper die pressing core 9, and the upper die return top insert 7 is located in the groove. The original mold structure is that the bottom surface of the upper die pressing core 9 is completely in contact with the upper surface of the molded part. Before demolding, the upper die pressing core 9 is lifted earlier than the upper die base 8 through the nitrogen delay cylinder; while the present application provides a groove on the bottom surface of the upper die pressing core 9, and the groove is provided with an upper die return top insert 7 and a lower die return top insert 6 with a matching bevel, so that the lifting cylinder 5 drives the lower die return top insert 6 to move, and lifts the upper die return top insert 7 to indirectly lift the upper die pressing core 9, thereby replacing the lifting work of the delay nitrogen cylinder.

[0019] A sensor 11 is installed along the travel path of the lower die return insert 6. This sensor 11 is positioned on the upper surface of the lower die base core 12. This sensor accurately determines the travel distance of the lower die return insert 6, thereby determining the height of the upper die core 9. The upper die base 8 can only be lifted and raised when the upper die core 9 is completely clear of the forming surface.

[0020] The upper surface of the lower die base 1 is connected to the lower die base core 12 through the lower die nitrogen cylinder 3. A groove is formed on the upper surface of the lower die base 1, and the outer periphery of the groove is connected to the guide slide 14. The outer surface of the blank holder 13 is slidably connected to the guide slide 14, and the inner surface is connected to the lower die base core 12. The lower die base core 12 is guided by the blank holder 13 to float up and down, ensuring the working stability of the lower die base core 12.

[0021] The working process of the drawing die with a pneumatic delayed return mechanism is as follows: when the machine tool press starts working, the slider on the machine tool drives the upper die base 8 to start moving downward. When it moves to the point where the lower die pressing core 12 and the upper die pressing core 9 are completely in contact with the material and the die pressing action is completed, the compressed air is transported to the lifting cylinder 5 through the cylinder pipeline 4, and the lower die return insert 6 is pushed to the right by the piston rod. When the lower die return insert 6 moves into place, it is completely in contact with the wedge surface of the upper die return insert 7, and the upper die pressing core 9 is lifted and separated from the pressed material. At the same time, the sensor 11 judges that the lower die return insert 6 moves into place through the distance, and the lifting cylinder 5 stops moving. Then the slider on the machine tool drives the upper die base 8 to make a return motion. Under the action of the lower die nitrogen cylinder 3, the blank holder 13 moves upward together with the lower die base core 12 and the die. When the upper die base 8 is completely separated from the lower die core 12 and is in a free state, the upper die nitrogen cylinder 10 starts to work and resets the upper die core 9, completing the delay effect of the mechanism.

Claims

1. A drawing die with a pneumatic delayed return mechanism, comprising a lower die base (1), a lower die base core (12), an upper die base (8) and an upper die pressing core (9), characterized in that: An upper die return insert (7) is connected to the lower end of each upper die pressing core (9) at a non-working position, and a lower die return insert (6) is provided at a corresponding position below the upper die return insert (7). The side end surface of the lower die return insert (6) is connected to the piston rod of the jacking cylinder (5), and the cylinder seat of the jacking cylinder (5) is fixedly connected to the lower die seat core (12). The cylinder pipeline (4) for controlling the jacking cylinder (5) is connected to an external air control system.

2. The drawing die with a pneumatic delayed return mechanism according to claim 1, characterized in that: The contact surface between the upper die top return insert (7) and the lower die top return insert (6) is a wedge surface.

3. The drawing die with a pneumatic delayed return mechanism according to claim 1, characterized in that: A plurality of vertical cavities are provided in the upper die base (8), and an upper die nitrogen cylinder (10) is provided on the top of the vertical cavity. The lower part of the upper die nitrogen cylinder (10) is connected to the upper die pressing core (9).

4. The drawing die with a pneumatic delayed return mechanism according to claim 3, characterized in that: The bottom of the upper mold pressing core (9) contacts the upper surface of the molded part, and a groove is provided on the bottom surface of the upper mold pressing core (9), and the upper mold return top insert (7) is located in the groove.

5. The drawing die with a pneumatic delayed return mechanism according to claim 1, characterized in that: A sensor (11) is provided on the moving stroke of the lower die return top insert (6), and the sensor (11) is positioned on the upper surface of the lower die base core (12).

6. The drawing die with a pneumatic delayed return mechanism according to claim 1, characterized in that: The upper surface of the lower die base (1) is connected to the lower die base material core (12) through the lower die nitrogen cylinder (3), and a groove is formed on the upper surface of the lower die base (1). The outer periphery of the groove is connected to the guide slide (14), and the outer surface of the pressure ring (13) is slidably connected to the guide slide (14), and the inner surface is connected to the lower die base material core (12).

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