Stamping die with anti-wrinkling delayed reset material pressing mechanism

Abstract

The utility model belongs to the technical field of stamping dies, and particularly relates to a stamping die with an anti-wrinkling delayed reset pressing mechanism, which comprises an upper die assembly and a lower die assembly. The upper die assembly is arranged above the lower die assembly. The upper die assembly comprises an upper die base, a male die, a pressing plate, a punch and a nitrogen spring. The punch is fixed below the upper die base, the male die is arranged below the punch, the material pressing plate is arranged at the side end of the punch, and the nitrogen spring is used for controlling the material pressing plate to be close to or away from the lower die assembly. According to the structure, floating of the lower die assembly can be delayed, the pressing plate abuts against the lower die assembly all the time in the return stroke process, the lower die assembly floats slowly, and therefore the product quality is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of stamping dies, and in particular relates to a stamping die with an anti-wrinkling delayed reset material pressing mechanism. Background Art

[0002] The products of the drawing die need to be pressed by a blank holder to control the uniform feeding of the material during drawing. However, when the stripping plate returns during the mold opening of the traditional mold structure, the blank holder will exert an instantaneous elastic force on the product, which can easily cause deformation of the product after drawing, thus affecting the quality of the product. Utility Model Content

[0003] The utility model aims to provide a stamping die with an anti-wrinkling delayed reset pressing mechanism, aiming to solve the technical problem in the prior art that the edge holding ring will exert an instantaneous elastic force on the product, which may easily cause deformation of the stretched product and thus affect the quality of the product.

[0004] To achieve the above-mentioned purpose, the embodiment of the utility model provides a stamping die with an anti-wrinkling delayed reset pressing mechanism, comprising an upper die assembly and a lower die assembly. The upper die assembly is arranged above the lower die assembly. The upper die assembly comprises an upper die seat, a punch, a pressing plate, a punch and a nitrogen spring. The punch is fixed below the upper die seat, the punch is arranged below the punch, the pressing plate is arranged at the side end of the punch, and the nitrogen spring is used to control the pressing plate to approach or move away from the lower die assembly.

[0005] Further, the lower die assembly includes a lower die seat, a concave die, a blank holder and an elastic reset member. The concave die is fixed to the upper end of the lower die seat and is located below the convex die. The blank holder is arranged at the side end of the concave die and is located at the lower end of the press plate. One end of the elastic reset member is connected to the blank holder and the other end is connected to the lower die seat for resetting the press plate.

[0006] Furthermore, the material pressing plate is provided with a counter-block extending in the direction of the blank pressing ring, and a cavity is also provided in the blank pressing ring, and a driving member and a slider are provided in the cavity. The slider is slidably provided in the cavity, and an abutment block corresponding to the counter-block is extended upwardly from the slider. The driving member is provided in the cavity, and is used to drive the slider to slide in the horizontal direction in the cavity.

[0007] Furthermore, a groove corresponding to the punch is provided on the upper surface of the die, a boss is provided on the side of the lower end of the die, and a shaping groove corresponding to the boss is provided on the inner side of the lower end of the pressing plate.

[0008] The above one or more technical solutions in the stamping die with anti-wrinkling delayed reset pressing mechanism provided by the embodiment of the utility model have at least one of the following technical effects: the blank is accurately placed on the lower die assembly by a positioning gauge or a guide pin, and after the placement is completed, the upper die assembly moves downward until the pressing plate contacts the blank, and the pressing plate and the lower die assembly jointly press the blank according to the pressure provided by the nitrogen spring. After the pressing state, the upper die assembly continues to move downward until the pressing plate and the upper die seat are in a dead state, at which time the pressing plate and the punch form an integral punch structure, the upper die assembly continues to move downward, the punch and the lower die assembly draw the blank, and at the same time, the pressing plate clamps the blank under the action of the nitrogen spring and presses the lower die assembly downward to control uniform material feeding. The upper die assembly returns, the pressing plate returns synchronously to release the product, and the lower die assembly slowly lifts to demould the product until the lower die assembly returns. This structure can delay the floating of the lower die assembly, so that the pressing plate always supports the lower die assembly during the return process, so that the lower die assembly slowly floats, thereby ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0010] Figure 1 A cross-sectional view of a stamping die with an anti-wrinkling delayed reset pressing mechanism provided in an embodiment of the utility model.

[0011] Figure 2 Another cross-sectional view of the stamping die with an anti-wrinkling delayed reset pressing mechanism provided in an embodiment of the utility model.

[0012] Figure numbers: 10, upper die assembly; 11, upper die seat; 12, punch; 13, pressure plate; 14, punch; 15, nitrogen spring; 16, top block; 17, shaping groove; 20, lower die assembly; 21, lower die seat; 22, die; 23, pressure ring; 24, elastic reset member; 25, avoid cavity; 26, driving member; 27, slider; 28, abutment block; 29, boss. DETAILED DESCRIPTION

[0013] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0014] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0015] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0016] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0017] In one embodiment of the present invention, Figure 1~2As shown, a stamping die with an anti-wrinkling delayed reset pressing mechanism is provided, including an upper die assembly 10 and a lower die assembly 20. The upper die assembly 10 is arranged above the lower die assembly 20. The upper die assembly 10 includes an upper die base 11, a punch 12, a pressing plate 13, a punch 14 and a nitrogen spring 15. The punch 14 is fixed below the upper die base 11, the punch 12 is arranged below the punch 14, the pressing plate 13 is arranged at the side end of the punch 14, and the nitrogen spring 15 is used to control the pressing plate 13 to approach or move away from the lower die assembly 20. In this embodiment, the blank is accurately placed on the lower die assembly 20 by a positioning gauge or a guide pin. After the placement is completed, the upper die assembly 10 moves downward until the pressing plate 13 contacts the blank, and the pressing plate 13 and the lower die assembly 20 jointly press the blank according to the pressure provided by the nitrogen spring 15. After the material pressing state, the upper mold assembly 10 continues to move downward until the pressure plate 13 and the upper mold base 11 are in a locked state. At this time, the pressure plate 13 and the punch 12 form an integral punch 12 structure, and the upper mold assembly 10 continues to move downward. The punch 12 and the lower mold assembly 20 draw the sheet. At the same time, the pressure plate 13 clamps the sheet under the action of the nitrogen spring 15 and presses the lower mold assembly 20 downward to control the uniform material feeding. The upper mold assembly 10 returns, and the pressure plate 13 returns synchronously to release the product. The lower mold assembly 20 is slowly lifted to demold the product until the lower mold assembly 20 returns to its position. This structure can delay the floating of the lower mold assembly 20, allowing the pressure plate 13 to always support the lower mold assembly 20 during the return process, so that the lower mold assembly 20 slowly floats, thereby ensuring product quality.

[0018] Specifically, Figure 1~2As shown, the lower die assembly 20 includes a lower die base 21, a die 22, a blank holder 23 and an elastic reset member 24. The die 22 is fixed to the upper end of the lower die base 21 and is located below the punch 12. The blank holder 23 is arranged at the side end of the die 22 and is located at the lower end of the pressure plate 13. One end of the elastic reset member 24 is connected to the blank holder 23, and the other end is connected to the lower die base 21, and is used to reset the pressure plate 13. In this embodiment, the blank is accurately placed on the blank holder 23 by a positioning gauge or a guide pin. After the placement is completed, the upper die assembly 10 moves downward until the pressure plate 13 contacts the blank. The pressure plate 13 and the blank holder 23 jointly press the blank according to the pressure provided by the nitrogen spring 15 or the punch press ejector. After the material pressing state, the upper mold assembly 10 continues to move downward until the pressure plate 13 and the upper mold base 11 are in a locked state. At this time, the pressure plate 13 and the punch 12 form an integral punch 12 structure, and the upper mold assembly 10 continues to move downward. The punch 12 and the die 22 draw the sheet. At the same time, the pressure plate 13 clamps the sheet under the action of the nitrogen spring 15 and presses the blank holder 23 downward to control the uniform material feeding. The upper mold assembly 10 returns, and the pressure plate 13 returns synchronously to release the product. The blank holder 23 is slowly lifted to demold the product until the blank holder 23 returns to its position. This structure can delay the floating of the blank holder 23, so that the pressure plate 13 always supports the blank holder 23 during the return process, so that the blank holder 23 slowly floats, thereby ensuring product quality.

[0019] Specifically, Figure 1~2 As shown, the pressing plate 13 is provided with a counter-block 16 extending in the direction of the blank pressing ring 23, and a cavity 25 is also provided in the blank pressing ring 23, and a driving member 26 and a slider 27 are provided in the cavity 25. The slider 27 is slidably arranged in the cavity 25, and the slider 27 is extended upward to be provided with an abutment block 28 corresponding to the counter-block 16. The driving member 26 is arranged in the cavity 25, and is used to drive the slider 27 to slide in the cavity 25 in the horizontal direction. In this embodiment, the top block 16 and the abutment block 28 are not in contact temporarily, that is, the pressure plate 13 and the blank holder ring 23 are not in direct contact; however, when the pressure plate 13 has a return movement, the sensor command is given, and the slider 27 has a tendency to move to the right under the drive of the driving member 26 during the return of the pressure plate 13. At the moment when the pressure plate 13 is about to leave the product, the slider 27 slides to the right and the abutment block 28 contacts the top block 16, ensuring that the blank holder ring 23 is slowly lifted and the product is not damaged or deformed. Through the functional workpiece cooperation of the upper and lower mold assemblies 20, the blank holder ring 23 is prevented from instantly popping up and de-materializing and damaging the product, effectively ensuring the product shape, better controlling the product rebound rate, improving the product qualification rate, avoiding unnecessary waste or damage of workpieces, thereby saving material costs and manual debugging time costs.

[0020] Specifically, Figure 1~2As shown, a groove corresponding to the punch 12 is provided on the upper surface of the die 22 , a boss 29 is provided on the side of the lower end of the die 22 , and a shaping groove 17 corresponding to the boss 29 is provided on the inner side of the lower end of the pressing plate 13 .

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements 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 with an anti-wrinkling delayed reset material pressing mechanism, comprising an upper die assembly and a lower die assembly; the upper die assembly is arranged above the lower die assembly; and is characterized in that: The upper die assembly includes an upper die base, a punch, a pressure plate, a punch and a nitrogen spring; the punch is fixed below the upper die base, the punch is arranged below the punch, the pressure plate is arranged at the side end of the punch, and the nitrogen spring is used to control the pressure plate to approach or move away from the lower die assembly.

2. The stamping die with anti-wrinkling delayed reset material pressing mechanism according to claim 1, characterized in that: The lower die assembly includes a lower die base, a die, a pressure ring and an elastic reset member; the die is fixed to the upper end of the lower die base and is located below the punch; the pressure ring is arranged at the side end of the die and is located at the lower end of the pressure plate; one end of the elastic reset member is connected to the pressure ring, and the other end is connected to the lower die base, for resetting the pressure plate.

3. The stamping die with anti-wrinkling delayed reset material pressing mechanism according to claim 2, characterized in that: The pressure plate is extended toward the pressure ring and is provided with a counter block. The pressure ring is also provided with a cavity, and the cavity is provided with a driving member and a slider. The slider is slidably arranged in the cavity, and the slider extends upward and is provided with an abutment block corresponding to the counter block. The driving member is arranged in the cavity, and is used to drive the slider to slide in the horizontal direction in the cavity.

4. The stamping die with anti-wrinkling delayed reset material pressing mechanism according to claim 2, characterized in that: A groove corresponding to the punch is provided on the upper surface of the die, a boss is provided on the side of the lower end of the die, and a shaping groove corresponding to the boss is provided on the inner side of the lower end of the pressure plate.

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