Efficient punching and drawing die

Abstract

The utility model discloses an efficient punching and drawing die which is characterized in that a lower die punch is arranged on a lower die forming plate, an inner stripping plate is embedded in an upper die plate in a sliding manner, and an upper die insert is arranged on the inner stripping plate. According to the utility model, the lower die punch is arranged on the lower die, and the upper die insert is arranged on the movable inner stripper plate of the upper die, so that a plate can be reversely drawn to form a convex hull, the punching force distribution area is relatively large, the drawing forming acting force of each structure is relatively small, the plate is not easy to break, the drawing yield is improved, and the production cost is reduced. The outline and the flash of the product can be synchronously punched in the two relative movement processes of the upper template and the inner stripping plate in the one-time mold closing and opening process, so that the forming efficiency is high, and the mold structure can be simplified; and the beating rod is arranged to be in transmission connection with the inner stripping plate, so that the drawing speed can be slowed down during mold closing, the flash punching speed can be increased during mold opening, and the forming yield is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a high-efficiency punching and drawing die. Background Art

[0002] In stamping dies, the drawing process is prone to defects such as sheet material tearing and breaking. Therefore, it is necessary to accurately design and install the die's pressure plate, punch, insert and other structural parts and select the appropriate punching pressure and stamping speed, and the processing efficiency is relatively low. In production, some slightly complex products mostly require multiple processes such as drawing and blanking. The stamping of each process is completed one by one in sequence. The mold manufacturing cost is high, the assembly is time-consuming and labor-intensive, and the production efficiency is low. If continuous mold production is used, although the production efficiency can be improved, the consistent stamping parameters on the mold can easily cause poor drawing and reduce the product yield. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides a high-efficiency punching and drawing die, which can reversely draw the sheet material without easily breaking the sheet material, and can complete the drawing, cutting and flash removal processes in one die closing operation, thereby improving the forming efficiency and yield rate.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is as follows:

[0005] A high-efficiency punching and drawing die comprises an upper die, a lower die and a guide structure matched and installed therebetween, wherein an upper die seat and an upper die plate are arranged on the upper die, and a lower die seat is arranged on the lower die; wherein:

[0006] The lower die seat is provided with a lower pad, the lower pad is provided with a forming plate, and the forming plate is provided with one or more lower die punches adapted to the product and extending along the mold closing direction;

[0007] An inner stripping plate is slidably embedded in the lower end of the upper template. The inner stripping plate is arranged directly above the forming plate and its outer contour matches the outer contour of the product. The inner stripping plate can slide along the mold closing direction on the upper template under the action of external force. One or more upper mold inserts adapted to the product are arranged at the lower end of the inner stripping plate, and each of the upper mold inserts is matched and arranged directly above one of the lower mold punches.

[0008] As a further elaboration of the above technical solution:

[0009] In the above technical solution, the upper mold is also provided with an upper cover plate mounted above the upper mold base, and the upper cover plate is provided with a plurality of elastic components, each of which is transmission-connected to one or more top plates, and each of the top plates is provided with one or more hitting rods extending along the mold opening direction, and each of the hitting rods passes through the upper mold base and the upper mold plate in sequence and abuts against the inner stripping plate.

[0010] In the above technical solution, each of the elastic components is a spring or a nitrogen spring.

[0011] In the above technical solution, the lower end of the upper mold plate is provided with a groove matching the outer contour of the product, and the side wall of the groove is provided with a plurality of guide grooves extending along the mold closing direction.

[0012] In the above technical solution, a first guide member is provided on the lower mold beside the forming plate, and a second guide member matching the first guide member is provided on the upper mold.

[0013] In the above technical solution, a limiting member is provided on the lower mold beside the forming plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are: by arranging a lower die punch on the lower die and an upper die insert on the movable inner stripping plate of the upper die, the sheet material can be reversely drawn to form a convex hump, the punching force distribution area is relatively large, the drawing forming force of each structure is relatively small, it is not easy to break the sheet material, the drawing yield rate is improved, and the product contour and flash can be synchronously punched during the two relative movements of the upper die plate and the inner stripping plate in a mold closing and mold opening process, the forming efficiency is high, and the mold structure can be simplified; by arranging a hitting rod and a transmission connection with the inner stripping plate, the drawing speed can be slowed down during mold closing and the punching flash speed can be accelerated during mold opening, thereby improving the forming yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the product of this embodiment;

[0016] Figure 2 It is a schematic structural diagram of the present embodiment when the mold is opened (for showing the guide structural member and the second guide member).

[0017] In the figure: 100, upper die; 200, lower die; 300, product; 10, upper die base; 20, upper die plate; 21, slot; 22, guide groove; 30, lower die base; 40, lower pad; 50, forming plate; 51, lower die punch; 60, inner stripping plate; 61, upper die insert; 70, upper cover plate; 80, elastic component; 90, top plate; 1, hitting rod; 2, guide member; 3, limit member. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application 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 limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, 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 it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features being in direct contact, or it can include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] For ease of understanding, Figure 1 The schematic diagram of the partial structure of the product 300 in this embodiment shows that there are multiple convex hulls, holes and grooves of different sizes and with high precision requirements on the uneven surface of the product. In production, it is necessary to perform processes such as drawing convex hulls, punching holes and grooves, and cutting flash. There are many processes and high precision requirements. The quality of products produced by continuous molds is not high, but the production method of punching and forming structures one by one with independent molds is too costly. Therefore, the utility model makes the following improvements to the mold structure.

[0021] like Figure 2 As shown, a high-efficiency punching and drawing die comprises an upper die 100, a lower die 200 and a guide structure matched and installed therebetween, an upper die base 10 and an upper die plate 20 are arranged on the upper die 100, and a lower die base 30 is arranged on the lower die 200; wherein:

[0022] A lower backing plate 40 is disposed on the lower die seat 30, a forming plate 50 is disposed on the lower backing plate 40, and one or more lower die punches 51 adapted to the product and extending along the mold closing direction are disposed on the forming plate 50;

[0023] An inner stripping plate 60 is slidably embedded in the lower end of the upper template 20. The inner stripping plate 60 is arranged directly above the forming plate 50 and its outer contour matches the outer contour of the product. The inner stripping plate 60 can slide along the mold closing direction on the upper template 20 under the action of external force. One or more upper mold inserts 61 adapted to the product are arranged at the lower end of the inner stripping plate 60, and each upper mold insert 61 is matched and arranged directly above a lower mold punch 51.

[0024] The working process of the utility model is as follows: first, the sheet material / semi-finished product is fixed on the forming plate 50, the punch press is started, the upper die 100 is driven to move downward, the upper cover plate 70, the upper die seat 10, the upper die plate 20 and the inner stripping plate 60 are moved downward synchronously, the upper die plate 20 first contacts the sheet material / semi-finished product, the forming plate 50 and the lower die punch 51 are against the sheet material / semi-finished product, the upper die 100 continues to drive the upper die plate 20 to move downward to punch out the sheet material / semi-finished product to form the outer contour of the product 300, the forming plate 50 pushes the inner stripping plate 60 to slide upward in the upper die plate 50 to reduce the shear force, the lower die punch 51 and the upper die insert 61 cooperate to draw the convex bulge and punch the hole groove on the sheet material / semi-finished product; after completion, the upper die 100 leaves the lower die 200, the inner stripping plate 60 loses the push of the forming plate 50, and slides down and resets inwardly in the upper die plate 20 under the action of its own gravity, and cooperates with the upper die plate 20 to cut the burrs on the outer contour of the product 300.

[0025] Furthermore, the upper mold 100 is also provided with an upper cover plate 70 mounted above the upper mold base 10, and a plurality of elastic components 80 are provided on the upper cover plate 70, each of which is transmission-connected to one or more top plates 90, and each top plate 90 is provided with one or more hitting rods 1 extending along the mold opening direction, and each hitting rod 1 passes through the upper mold base 10 and the upper mold plate 20 in sequence and abuts against the inner stripping plate 60, and each elastic component 80 is a spring or a nitrogen spring.

[0026] In order to further slow down the upward movement speed of the inner stripping plate 60 during mold closing to slow down the convex hull drawing speed, and to accelerate the downward movement speed of the inner stripping plate 60 during mold opening to improve the effect of cutting the flash, the present embodiment provides a hitter 1 in transmission connection with the inner stripping plate 60 on the upper mold 100. During mold closing, the inner stripping plate 60 moves upward to push the hitter 1 to move upward and compress the elastic component 80 synchronously to slow down the drawing thrust; during mold opening, after the forming plate 50 leaves the inner stripping plate 60, the elastic component 80 pushes the inner stripping plate 60 to move downward faster under the action of the rebound force, and the plate edge of the inner stripping plate 60 cooperates with the plate edge of the upper mold plate 20 to cut the plate edge waste or flash.

[0027] Furthermore, a first guide member 2 is provided on the lower mold 200 beside the forming plate 50 , and a second guide member matching the first guide member 2 is provided on the upper mold 100 ; a limit member 3 is provided on the lower mold 200 beside the forming plate 50 .

[0028] It can be understood that the card slot 21 can limit the initial position of the inner stripping plate 60, the guide slot 22 can correct the sliding direction of the inner stripping plate 60 and limit its maximum upward travel, the first guide member 2 and the second guide member can further correct the upper template 20 / inner stripping plate 60 and the forming plate 50, and the limiter 3 can sense the distance between the upper template 20 and the lower mold 200 to avoid undesirable phenomena such as pulling and convex bumps caused by too small mold spacing. In this embodiment, the first guide member 2 and the limiter 3 are both arranged on the lower pad 40, and the second guide member is arranged on the upper template 20.

[0029] The utility model provides a lower die punch 51 on the lower die 200 and an upper die insert 61 on the movable inner stripping plate 60 of the upper die 100, so that the sheet material can be reversely drawn to form a convex bump. The punching force distribution area is relatively large, and the drawing forming force of each structure is relatively small, so it is not easy to break the sheet material, thereby improving the drawing yield rate. The product contour and flash can be synchronously punched during the two relative movements of the upper die plate 20 and the inner stripping plate 60 in a mold closing and mold opening process, so the molding efficiency is high and the mold structure can be simplified. By arranging a driving connection between the hitting rod 1 and the inner stripping plate 60, the drawing speed can be slowed down during mold closing and the flash punching speed can be accelerated during mold opening, thereby improving the molding yield rate.

[0030] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-efficiency punching and drawing die, comprising an upper die, a lower die and a guide structure matched and installed therebetween, wherein the upper die is provided with an upper die seat and an upper die plate, and the lower die is provided with a lower die seat; characterized in that: The lower die seat is provided with a lower pad, the lower pad is provided with a forming plate, and the forming plate is provided with one or more lower die punches adapted to the product and extending along the mold closing direction; An inner stripping plate is slidably embedded in the lower end of the upper template. The inner stripping plate is arranged directly above the forming plate and its outer contour matches the outer contour of the product. The inner stripping plate can slide along the mold closing direction on the upper template under the action of external force. One or more upper mold inserts adapted to the product are arranged at the lower end of the inner stripping plate, and each of the upper mold inserts is matched and arranged directly above one of the lower mold punches.

2. The high-efficiency punching and drawing die according to claim 1, characterized in that: The upper mold is also provided with an upper cover plate mounted above the upper mold base, and the upper cover plate has a plurality of elastic components, each of which is transmission-connected to one or more top plates, and each of the top plates is provided with one or more hitting rods extending along the mold opening direction, and each of the hitting rods passes through the upper mold base and the upper mold plate in sequence and abuts against the inner stripping plate.

3. A high-efficiency punching and drawing die according to claim 2, characterized in that: Each of the elastic components is a spring or a nitrogen spring.

4. A high-efficiency punching and drawing die according to any one of claims 1 to 3, characterized in that: The lower end of the upper mold plate is provided with a clamping groove matching the outer contour of the product, and the side wall of the clamping groove is provided with a plurality of guide grooves extending along the mold closing direction.

5. The high-efficiency punching and drawing die according to claim 4, characterized in that: The lower mold is provided with a first guide member beside the forming plate, and the upper mold is provided with a second guide member matching the first guide member.

6. The high-efficiency punching and drawing die according to claim 4, characterized in that: The lower mold is provided with a limiting piece beside the forming plate.

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