Variable-elasticity mold elastic discharging device and using method thereof

Abstract

The invention belongs to the technical field of mechanical bench worker stamping, and discloses a variable-elasticity die elastic discharging device and a using method thereof. 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] The invention relates to the technical field of mechanical fitter stamping, and in particular to a mold elastic unloading device with variable elastic force and a use method thereof. Background Art

[0002] Stamping is a pressure processing method that uses a die installed on a press to apply pressure to the material at room temperature to separate or plastically deform the material, thereby obtaining the desired parts. The stamping die is a special process equipment that processes materials (metal or non-metal) into parts (or semi-finished products) in cold stamping.

[0003] The stamping die mainly includes: the design of the concave and convex die structure, the selection of the fixing form, the positioning parts, the unloading device and the guiding parts. Among them, the unloading device plays a very important role in the die design. In the existing die design, each set of die has a corresponding unloading device.

[0004] The existing mold unloading device has the following disadvantages: first, it increases the material cost and labor cost of mold design; second, unloading must be considered when designing the mold, which increases the complexity of mold design; third, there is a unique unloading design. If the rest of the mold design meets the requirements but the unloading is not good, it will lead to the defects of redesigning, reprocessing and re-testing the mold as a whole. Fourth, when designing the mold, there is a deviation between theory and practice, and the elastic force of the material cannot be accurately controlled. There is a problem that the elastic force is too large to complete the qualified bending of the raw material, and the elastic force is too small to completely eject the raw material. Summary of the invention

[0005] The present invention proposes a mold elastic unloading device with variable elastic force, which can realize elastic unloading and anti-wrinkle pressing. Without changing the original mold, different processing methods can be completed according to the different elastic forces required, thus solving the above-mentioned shortcomings.

[0006] The technical solution of the present invention is as follows: A variable elastic force mold elastic unloading device comprises 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 core shaft 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 is connected to the lower base 5 through a support plate 2; one end of the mandrel 8 is connected to the upper platform 1, and the other end is connected to the lower base 5; the mandrel 8 is sequentially provided 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 a small-diameter semicircular sleeve 12, and one end of the large-diameter spring 6 contacts a large-diameter semicircular sleeve 11; the heights 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 the exchange platform 3 and the lower platform 4 in sequence; the upper platform 1 and the exchange platform 3 are provided with coaxial ejector holes; the upper platform 1 and the lower platform 4 are provided with coaxial ejector 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 passing through the push rod hole of the upper platform 1 , the push rod 13 is connected to the exchange platform 3 or the lower platform 4 .

[0010] The core shafts 8 are arranged in a symmetrical manner.

[0011] The lower guide sleeve 9 is arranged outside the large-diameter semicircular sleeve 11 ; and the upper guide sleeve 10 is fixed below the lower platform 4 .

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

[0013] First, assemble the variable elastic force mold elastic unloading device on the hydraulic press platform, and fix the pressing die on the upper platform 1;

[0014] When a large elastic force is selected, the ejector rod 13 is passed through the ejector rod hole of the upper platform 1, and the lower end of the ejector rod 13 is placed on the exchange platform 3; when the pressing punch is working, a downward force is applied to press the ejector rod 13 downward while pressing the material, and the ejector rod 13 acts on the exchange platform 3, so that the exchange platform 3 and the lower platform 4 move downward, compressing the large-diameter spring 6 and the small-diameter spring 7. When the pressing punch is finished working, the large-diameter spring 6 and the small-diameter spring 7 rebound at the same time, and the ejector rod 13 is pushed upward to realize the elastic material with a large elastic force;

[0015] When a small elastic force is selected, the push rod 13 is passed through the coaxial push rod holes of the upper platform 1 and the exchange platform 3, and the lower end is placed on the lower platform 4. When the profiling punch works, a downward force is applied; the push rod 13 acts on the lower platform 4, causing the lower platform 4 to move downward, only compressing the large diameter spring 6. When the profiling punch finishes working, the large diameter spring 6 rebounds, and pushes the push rod 13 upward to achieve elastic material with a small elastic force.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The overall structure of the operating device is simple. The lower base is equipped with assembly holes to meet the needs of use on different types of equipment. The upper platform is equipped with different ejector holes to control the spring force in conjunction with the exchange platform, thereby meeting the needs of molds with different output forces, different sizes, and different contact methods.

[0018] (2) There is a semicircular sleeve at the bottom of the spring, which is easy to disassemble and replace. The elastic force can be fine-tuned by replacing the semicircular sleeves of different heights.

[0019] (3) The connection structure between the upper platform, the exchange platform, the lower platform and the core shaft is simple and compact, which is convenient for disassembly and replacement of springs. Even if a larger or smaller elastic force is required, it can be easily met.

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

[0021] (5) The lower guide sleeve is non-fixed. First, it can achieve the purpose of facilitating the replacement of the semicircular sleeve; second, the semicircular sleeve can be fixed by the hole shaft; third, it can be used as a guide for spring compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of a mold elastic unloading device with variable elastic force;

[0023] Figure 2 It is a cross-sectional view at the mandrel;

[0024] Figure 3 Exploded view of the mold elastic unloading device with variable elastic force.

[0025] In the figure: 1-upper platform, 2-support plate, 3-exchange platform, 4-lower platform, 5-lower base, 6-large diameter spring, 7-small diameter spring, 8-core shaft, 9-lower guide sleeve, 10-upper guide sleeve, 11-large diameter semicircular sleeve, 12-small diameter semicircular sleeve, 13-top rod. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and examples. The described examples are only some examples of the present invention, not all examples. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by directional words such as "upper, lower", etc. is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words 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 cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0027] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mold elastic unloading device with variable elastic force, 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 core shaft 8, an upper guide sleeve 9, a lower guide sleeve 10, a large-diameter semicircular sleeve 11, a small-diameter semicircular sleeve 12 and a replaceable ejector rod 13;

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

[0029] The lower base 5 is used to fix the device on equipment such as a hydraulic press or a punching 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 is connected to the lower base 5 by a core shaft 8, on the outside of which 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;

[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 semicircular sleeve and to guide the spring;

[0034] The exchange platform 3 is provided with a push rod hole, connected to the core shaft 8, and supported by a small-diameter spring 7;

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

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

[0037] A specific implementation example Figures 1 to 3 As shown, the upper platform 1 and the lower base 5 are connected by hexagon socket bolts through two support plates 2, and four mandrels 8 are connected in a symmetrical manner. The lower base 5 has assembly holes at both ends and is fixed on the platform of the hydraulic press or punching machine. The mandrel 8 is equipped with a small-diameter spring 7 and a large-diameter spring 6 in sequence from the inside to the outside. The bottom of the small-diameter spring 7 is equipped with two small-diameter semicircular sleeves 12, and the bottom of the large-diameter spring 6 is equipped with two large-diameter semicircular sleeves 11. The compression of the spring is adjusted by the height of the semicircular sleeve, thereby controlling the elastic force of the spring.

[0038] A coaxial push rod hole is reserved between the exchange platform 3 and the upper platform 1 , through which the core shaft 8 passes and is connected to the small-diameter spring 7 .

[0039] The lower platform 4 passes through the core shaft 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 selectively 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 profiling die is fixed on the upper platform 1. If a relatively large elastic force is selected, the push rod 13 can be passed through the push rod hole of the upper platform 1, and the lower end can be placed on the exchange platform 3. When the profiling punch is working, a downward force is applied to press the material while pressing the push rod 13 downward. The push 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 profiling punch finishes working, the large diameter spring 6 and the small diameter spring 7 rebound at the same time, pushing the push rod 13 upward, realizing the elasticity of the material with large elastic force.

[0042] If a relatively small elastic force needs to be selected, the push rod 13 can be passed through the coaxial push rod holes of the upper platform 1 and the exchange platform 3, and the lower end can be placed on the lower platform 4. When the profiling punch is working, a downward force is applied. Similarly, the push rod 13 will act on the lower platform 4, causing the lower platform 4 to move downward, only compressing the large diameter spring 6. When the profiling punch finishes working, the large diameter spring 6 rebounds, pushing the push rod 13 upward, thereby realizing the elasticity of small elastic force.

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

Claims

1. A mold elastic unloading device with variable elastic force, characterized in that: The variable elastic force mold elastic unloading device comprises 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 core shaft (8), a large diameter semicircular sleeve (11), a small diameter semicircular sleeve (12) and a push rod (13); The upper platform (1) and the lower base (5) are connected via a support plate (2); one end of a core shaft (8) is connected to the upper platform (1), and the other end is connected to the lower base (5); the core shaft (8) is provided with a small-diameter spring (7) and a large-diameter spring (6) in sequence from the inside to the outside, one end of the small-diameter spring (7) contacts a small-diameter semicircular sleeve (12), and one end of the large-diameter spring (6) contacts a large-diameter semicircular sleeve (11); the heights of the small-diameter semicircular sleeve (12) and the large-diameter semicircular sleeve (11) can be changed by replacement; Below the upper platform (1) are the exchange platform (3) and the lower platform (4) in sequence; the upper platform (1) and the exchange platform (3) are provided with coaxial ejector holes; the upper platform (1) and the lower platform (4) are provided with coaxial ejector 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 force mold elastic unloading device according to claim 1, characterized in that: A plurality of core shafts (8) are arranged in a symmetrical manner.

3. The variable elastic force mold elastic unloading device according to claim 1 or 2, characterized in that: A lower guide sleeve (9) is arranged outside the large-diameter semicircular sleeve (11); and an upper guide sleeve (10) is fixed below the lower platform (4).

4. A method for using the variable elastic force mold elastic unloading device according to any one of claims 1 to 3, characterized in that: The details are as follows: First, a variable elastic force mold elastic unloading device is assembled on the hydraulic press platform, and the pressing die is fixed on the upper platform (1); When a large elastic force is selected, the push rod (13) is passed through the push rod hole of the upper platform (1), and the lower end of the push rod (13) is placed on the exchange platform (3); when the pressing punch is working, a downward force is applied to press the material while pressing the push rod (13) downward, and the push rod (13) acts on the exchange platform (3), so that the exchange platform (3) and the lower platform (4) move downward, compressing the large-diameter spring (6) and the small-diameter spring (7). When the pressing punch is finished working, the large-diameter spring (6) and the small-diameter spring (7) rebound at the same time, pushing the push rod (13) upward, and realizing the material with a large elastic force; When a small elastic force is selected, the push rod (13) is passed through the coaxial push rod holes of the upper platform (1) and the exchange platform (3), and the lower end is placed on the lower platform (4). When the pressing punch is working, a downward force is applied; the push rod (13) acts on the lower platform (4), causing the lower platform (4) to move downward, only compressing the large diameter spring (6). When the pressing punch finishes working, the large diameter spring (6) rebounds, and the push rod (13) is pushed upward, thereby realizing the elastic material with a small elastic force.

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