Die elastic discharging device with variable elastic force

Abstract

The utility model belongs to the technical field of mechanical bench worker stamping, and discloses a die elastic discharging device with variable elasticity. One end of the mandrel is connected to the upper platform and the other end is connected to the lower base; the mandrel is sequentially provided with a small-diameter spring and a large-diameter spring from inside to outside, one end of the small-diameter spring is in contact with the small-diameter semicircular sleeve, and one end of the large-diameter spring is in contact with the large-diameter semicircular sleeve; the heights of the small-diameter semicircular sleeve and the large-diameter semicircular sleeve are changed through replacement; the exchange platform and the lower platform are sequentially arranged below the upper platform; the upper platform and the exchange platform are provided with coaxial ejector rod holes; the upper platform and the lower platform are provided with coaxial ejector rod holes. Semicircular sleeves are arranged at the bottoms of the springs, disassembly and replacement are convenient, and fine adjustment of elasticity is achieved by replacing the semicircular sleeves with different heights. The connection structure among the upper platform, the exchange platform, the lower platform and the mandrel is simple and compact, the springs are convenient to disassemble, assemble and replace, and the requirement for large or small elastic force can be easily met.

Description

Technical Field

[0001] This utility model relates to the field of mechanical fitter stamping technology, and in particular to a variable elastic mold unloading device. Background Technology

[0002] Stamping is a pressure processing method that uses dies mounted on a press to apply pressure to materials at room temperature, causing them to separate or undergo plastic deformation, thereby obtaining the desired parts. Stamping dies are special process equipment used in cold stamping to process materials (metal or non-metal) into parts (or semi-finished products).

[0003] Stamping dies mainly include: the design of the punch and die structure, the selection of the fixing method, positioning parts, unloading devices, and guiding parts. Among them, the unloading device plays a very important role in die design. In existing die designs, each die design has a corresponding unloading device.

[0004] Existing mold unloading devices have the following drawbacks: First, they increase the material and labor costs of mold design; second, the design of the mold must consider unloading, increasing the complexity of the mold design; third, there is a uniqueness in the unloading design—if the rest of the mold design meets the requirements, but the unloading is poor, it will lead to the defect of redesigning, reprocessing, and re-trialing the entire mold; fourth, there is a discrepancy between theory and practice in mold design, making it impossible to accurately control the spring force of the material, resulting in problems such as excessive spring force failing to complete the qualified bending of the material, and insufficient spring force failing to completely eject the material. Utility Model Content

[0005] This invention proposes a variable elastic mold unloading device, which can achieve elastic unloading and anti-wrinkle pressing. Without changing the original mold, it can complete different processing methods according to the different elastic forces required, thus solving the above-mentioned shortcomings.

[0006] The technical solution of this utility model is as follows: A variable elastic mold unloading device includes an upper platform 1, a support plate 2, an exchange platform 3, a lower platform 4, a lower base 5, a large diameter spring 6, a small diameter spring 7, a mandrel 8, a lower guide sleeve 9, an upper guide sleeve 10, a large diameter semicircular sleeve 11, a small diameter semicircular sleeve 12, and a push rod 13.

[0007] The upper platform 1 and the lower base 5 are connected by a support plate 2; one end of the spindle 8 is connected to the upper platform 1 and the other end is connected to the lower base 5; the spindle 8 is equipped with a small diameter spring 7 and a large diameter spring 6 from the inside to the outside, one end of the small diameter spring 7 contacts the small diameter semicircular sleeve 12, and one end of the large diameter spring 6 contacts the large diameter semicircular sleeve 11; the height of the small diameter semicircular sleeve 12 and the large diameter semicircular sleeve 11 can be changed by replacing them.

[0008] Below the upper platform 1 are, in sequence, an exchange platform 3 and a lower platform 4; the upper platform 1 and the exchange platform 3 are provided with coaxial push rod holes; the upper platform 1 and the lower platform 4 are provided with coaxial push rod holes; the exchange platform 3 passes through the mandrel 8 and is connected to the other end of the small-diameter spring 7; the lower platform 4 passes through the mandrel 8 and is connected to the other end of the large-diameter spring 6.

[0009] After the push rod 13 passes through the push rod hole of the upper platform 1, it is connected to the exchange platform 3 or the lower platform 4.

[0010] Multiple mandrels 8 are arranged symmetrically.

[0011] The lower guide sleeve 9 is arranged on the outer side of the large-diameter semi-circular sleeve 11; the upper guide sleeve 10 is fixed below the lower platform 4.

[0012] The specific usage method of the variable elastic mold unloading device is as follows:

[0013] First, the variable elastic mold unloading device is assembled on the hydraulic press platform, and the forming die is fixed on the upper platform 1;

[0014] When high elasticity is selected, the ejector pin 13 is passed through the ejector pin hole of the upper platform 1, and the lower end of the ejector pin 13 is placed on the exchange platform 3. When the forming punch is working, a downward force is applied to press the material and push the ejector pin 13 downward. The ejector pin 13 acts on the exchange platform 3, causing the exchange platform 3 and the lower platform 4 to move downward, compressing the large diameter spring 6 and the small diameter spring 7. When the forming punch finishes working, the large diameter spring 6 and the small diameter spring 7 rebound at the same time, pushing the ejector pin 13 upward to achieve high elasticity material ejection.

[0015] When the low elasticity is selected, the ejector rod 13 passes through the coaxial ejector rod hole of the upper platform 1 and the exchange platform 3, and the lower end is placed on the lower platform 4. When the forming punch is working, a downward force is applied; the ejector rod 13 acts on the lower platform 4, causing the lower platform 4 to move downward, compressing only the large diameter spring 6. When the forming punch finishes working, the large diameter spring 6 rebounds, pushing the ejector rod 13 upward, thus realizing the low elasticity of the material.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) The overall structure of the operating device is simple. The lower base has reserved assembly holes, which can meet the needs of different types of equipment. The upper platform has reserved different push rod holes. With the help of the exchange platform, the spring force can be controlled, thereby meeting the needs of molds with different output forces, different sizes and different contact methods.

[0018] (2) The bottom of the spring has a semi-circular sleeve, which is easy to disassemble and replace. The elastic force can be finely adjusted by replacing the semi-circular sleeves of different heights.

[0019] (3) The connection structure between the upper platform, the exchange platform, the lower platform and the spindle is simple and compact, making it easy to disassemble and replace the springs. Even if a large or small spring force is required, it can be easily met.

[0020] (4) The device is designed with a symmetrical structure to avoid problems such as deformation error caused by uneven force.

[0021] (5) The lower guide sleeve is non-fixed. First, it can facilitate the replacement of the semi-circular sleeve; second, it can fix the semi-circular sleeve through the hole shaft; and third, it can be used as a guide for spring compression. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the variable elastic mold unloading device;

[0023] Figure 2 This is a sectional view of the mandrel.

[0024] Figure 3 This is an exploded view of a variable elastic unloading device for molds.

[0025] In the diagram: 1-Upper platform, 2-Support plate, 3-Exchange platform, 4-Lower platform, 5-Lower base, 6-Large diameter spring, 7-Small diameter spring, 8-Mandrel, 9-Lower guide sleeve, 10-Upper guide sleeve, 11-Large diameter semi-circular sleeve, 12-Small diameter semi-circular sleeve, 13-Top rod. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. In the description of the present invention, it should be understood that directional terms such as "upper" and "lower" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0027] To achieve the above objectives, this utility model provides the following technical solution: a variable elastic mold unloading device, comprising an upper platform 1, a support plate 2, an exchange platform 3, a lower platform 4, a lower base 5, a large-diameter spring 6, a small-diameter spring 7, a mandrel 8, an upper guide sleeve 9, a lower guide sleeve 10, a large-diameter semi-circular sleeve 11, a small-diameter semi-circular sleeve 12, and a replaceable push rod 13.

[0028] The upper platform 1 is its working surface, with a pre-drilled ejector pin hole, and assembly holes and threaded holes at both ends for fixed connection with the mold. The threaded hole in the middle can serve as mold centering and ejector pin.

[0029] The lower base 5 is for fixing, and is used to fix the device to equipment such as a hydraulic press or a stamping machine;

[0030] Furthermore, the support plate 2 is used to fix the upper platform 1 and the lower base 5;

[0031] Furthermore, the upper platform 1 and the lower base 5 are connected by a spindle 8, and a small-diameter semicircular sleeve 12, a small-diameter spring 7, a large-diameter semicircular sleeve 11 and a large-diameter spring 6 are fixed to its exterior.

[0032] Furthermore, the small-diameter spring 7 is placed on the small-diameter semicircular sleeve 12, and the large-diameter spring 6 is placed on the large-diameter semicircular sleeve 11;

[0033] The lower guide sleeve 9 is used to fix the semi-circular sleeve and to guide the spring;

[0034] The exchange platform 3 has a pre-drilled top rod hole for connection with the spindle 8 and is supported by a small-diameter spring 7.

[0035] The upper guide sleeve 10 is fixed to the lower platform 4, the lower platform 4 is connected to the spindle 8, and is supported by a large-diameter spring 6;

[0036] The replaceable top rod 13 is placed in the top rod hole, and its lower end is connected to the exchange platform 3 or the lower platform 4.

[0037] A specific implementation example Figures 1-3 As shown, the upper platform 1 and the lower base 5 are connected by two support plates 2 using hexagonal bolts, and four spindles 8 are connected symmetrically. The lower base 5 has mounting holes at both ends for fixing to a hydraulic press or stamping machine platform. From the inside out, the spindles 8 are fitted with small-diameter springs 7 and large-diameter springs 6. The bottom of the small-diameter springs 7 is fitted with two small-diameter semi-circular sleeves 12, and the bottom of the large-diameter springs 6 is fitted with two large-diameter semi-circular sleeves 11. The compression of the spring is adjusted by utilizing the height of the semi-circular sleeves, thereby controlling the spring force.

[0038] The exchange platform 3 and the upper platform 1 have pre-drilled coaxial push rod holes, through which the spindle 8 passes and is connected to the small diameter spring 7.

[0039] The lower platform 4 passes through the spindle 8 and is connected to the large-diameter spring 6.

[0040] The push rod 13 can pass through the push rod hole of the upper platform 1 and can be connected to the exchange platform 3 or the lower platform 4.

[0041] Specifically, in this embodiment, the device is first assembled on the hydraulic press platform, and the forming die is fixed on the upper platform 1. If a relatively large elastic force is selected, the ejector rod 13 can be passed through the ejector rod hole of the upper platform 1, and the lower end is placed on the exchange platform 3. When the forming punch is working, a downward force is applied to press the material and push the ejector rod 13 downward. The ejector rod 13 will act on the exchange platform 3, causing the exchange platform 3 and the lower platform 4 to move downward, compressing the large diameter spring 6 and the small diameter spring 7. When the forming punch finishes working, the large diameter spring 6 and the small diameter spring 7 rebound at the same time, pushing the ejector rod 13 upward to achieve a large elastic force for material ejection.

[0042] If a relatively small elastic force is required, the ejector pin 13 can be passed through the coaxial ejector pin hole of the upper platform 1 and the exchange platform 3, and the lower end can be placed on the lower platform 4. When the forming punch is working, it applies a downward force. Similarly, the ejector pin 13 will act on the lower platform 4, causing the lower platform 4 to move downward and compress only the large diameter spring 6. When the forming punch finishes working, the large diameter spring 6 rebounds and pushes the ejector pin 13 upward, thus achieving a small elastic force for the material.

[0043] As an improvement, the reserved ejector pin holes of the upper platform 1 and the exchange platform 3 can be enlarged or reduced. At the same time, the dimensions of the upper platform 1 and the exchange platform 3 can be enlarged or reduced to meet the material requirements of different types and sizes of molds.

Claims

1. A variable elastic mold unloading device, characterized in that, The variable elastic mold unloading device includes an upper platform (1), a support plate (2), an exchange platform (3), a lower platform (4), a lower base (5), a large-diameter spring (6), a small-diameter spring (7), a mandrel (8), a large-diameter semi-circular sleeve (11), a small-diameter semi-circular sleeve (12), and a push rod (13). The upper platform (1) and the lower base (5) are connected by a support plate (2); one end of the spindle (8) is connected to the upper platform (1) and the other end is connected to the lower base (5); the spindle (8) is equipped with a small diameter spring (7) and a large diameter spring (6) from the inside to the outside. One end of the small diameter spring (7) contacts the small diameter semicircular sleeve (12), and one end of the large diameter spring (6) contacts the large diameter semicircular sleeve (11); the height of the small diameter semicircular sleeve (12) and the large diameter semicircular sleeve (11) can be changed by replacing them; Below the upper platform (1) are, in sequence, an exchange platform (3) and a lower platform (4); the upper platform (1) and the exchange platform (3) are provided with coaxial push rod holes; the upper platform (1) and the lower platform (4) are provided with coaxial push rod holes; the exchange platform (3) passes through the mandrel (8) and is connected to the other end of the small diameter spring (7); the lower platform (4) passes through the mandrel (8) and is connected to the other end of the large diameter spring (6); After the push rod (13) passes through the push rod hole of the upper platform (1), it is connected to the exchange platform (3) or the lower platform (4).

2. The variable elastic mold unloading device according to claim 1, characterized in that, The mandrels (8) are arranged in multiple symmetrical ways.

3. The variable elastic mold unloading device according to claim 1 or 2, characterized in that, The lower guide sleeve (9) is arranged on the outside of the large-diameter semi-circular sleeve (11); the upper guide sleeve (10) is fixed below the lower platform (4).

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