A stretching die
By designing a tensile mold with a concave and convex die structure and deduplication assembly, the product deformation and surface damage caused by one-sided ejection in the prior art is solved, and uniform stress and rapid deduplication of the molded product are achieved, and product quality and production efficiency are improved.
Patent Information
- Application Number
- CN202421531915.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-30
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-30
AI Technical Summary
Existing tensile molds use one-side ejection method to eject the molded product and remove it, which can easily cause product deformation or damage to the product surface.
A tensile mold including two mold seats and a deduplication assembly is designed. The two mold seats are concave and convex mold structures, respectively, with deduplication plates and power parts. The deduplication is simultaneously deduplication through the deduplication plates of the upper and lower mold seats to ensure that the formed product is subjected to uniform force when opening the mold.
The molded product is achieved uniformly under stress when opening the mold, avoids product deformation and surface damage, and easily and quickly de-material, improving the quality and production efficiency of stretched products.
Smart Images
Figure CN222740127U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stamping dies, in particular to a stretching die. Background Art
[0002] Stamping is a production technology that uses the power of conventional or special stamping equipment to directly subject the sheet metal to deformation force in the die, thereby obtaining product parts with certain shapes, sizes and performances. Sheet metal, die and equipment are the three elements of stamping. Among them, the stretching die is a widely used die.
[0003] The existing drawing dies are often equipped with some ejection devices, in which the ejection devices are provided with ejection rods. Most of the existing drawing unloading technologies rely on some ejection rods to eject the drawn products from the drawing concave die. During ejection, because the product is subjected to force on one side, the acceptance is uneven, which can easily cause the product to deform, or produce some top marks on the product surface, thus affecting the quality and production efficiency of the drawn products. Therefore, a drawing die is needed to solve the problem that the existing drawing dies use a single-side ejection method to eject the formed product for removal, which can easily cause product deformation or damage to the product surface. Utility Model Content
[0004] The purpose of the present invention is to provide a stretching die, which can effectively solve the problem that the existing stretching die uses a single-side ejection method to eject the molded product for removal, which easily causes product deformation or damage to the product surface.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A stretching die comprises two die bases forming a stretching cavity and a stripping assembly. The two die bases are concave-convex die structures, and each die base is provided with a stripping assembly. The stripping assembly comprises a stripping plate and a power piece. The stripping plate is slidably mounted on the die base, and the stripping plate on the die base having a convex die structure is provided with a cavity for accommodating the convex die; the power piece is used to drive the stripping plate to strip the product from the stretching cavity.
[0007] Among them, the two mold bases include an upper mold base and a lower mold base, and the upper mold base is provided with a concave mold base and a cavity forming the inner shape of the product, and the lower mold base is provided with a convex mold base and a core forming the outer shape of the product; when the upper mold base and the lower mold base are closed, a stretching cavity is formed between the cavity and the core.
[0008] Among them, the upper die base includes an upper support plate, an upper pad and a die fixing plate; the die fixing plate is fixedly installed on the upper support plate through the upper pad; the die plate is fixedly installed on the die fixing plate; the stripper plate is slidably installed in the cavity of the die plate; the power part is fixedly installed on the upper support plate, and its power end is connected to the stripper plate.
[0009] Among them, a first guide hole is opened on the die fixing plate, and the first guide hole is connected with the cavity of the die plate; a first guide rod is provided on the stripping plate at a position corresponding to the first guide hole, and the first guide rod is slidably installed in the first guide hole.
[0010] Among them, one end of the first guide rod away from the concave template cavity passes through the first guide hole and extends to the outside of the first guide hole to form a first extension end; the end of the first extension end is provided with a limiting portion whose size is larger than the aperture of the first guide hole.
[0011] Among them, the lower die base includes a lower support plate, a lower pad and a punch fixing plate; the punch fixing plate is fixedly installed on the lower support plate through the lower pad; the punch template is fixedly installed on the punch fixing plate; the stripper plate is slidably sleeved on the outside of the core of the punch template; the power part is fixedly installed on the lower support plate, and its power end is connected to the stripper plate.
[0012] Among them, second guide rods are respectively provided at positions corresponding to the punch fixing plate and the stripping plate, and second guide holes are provided at positions corresponding to the second guide rods on the stripping plate, and the second guide rods are slidably installed in the second guide holes.
[0013] Among them, one end of the second guide rod away from the punch fixing plate passes through the second guide hole and extends to the outside of the second guide hole to form a second extension end; the end of the second extension end is provided with a limiting portion whose size is larger than the aperture of the second guide hole.
[0014] Among them, the power parts on the upper support plate are compression springs, and there are several of them; first through holes are respectively provided at positions corresponding to the compression springs on the upper pad, and the power ends of the compression springs pass through the first through holes and are connected to the stripping plate.
[0015] Among them, the power part on the lower support plate is a nitrogen spring; a second through hole is opened on the punch fixing plate, and a push plate is slidably installed in the second through hole. A push rod is fixedly installed on one end of the push plate facing the stripping plate, and the other end is connected to the power end of the nitrogen spring.
[0016] Compared with the prior art, the beneficial effects of this application are:
[0017] 1. The stretching die provided in the above technical solution has stripping components respectively arranged on the two die bases, wherein the upper die base is a concave die structure, provided with an inwardly sunken cavity, and the shape of the cavity is used to form the inner shape of the product, while the lower die base is a convex die structure, provided with a raised core, and the shape of the core is used to form the outer shape of the product. In order to ensure that the molded product can be demolded smoothly when the mold is opened and will not be deformed or damaged by the stripping component due to uneven force. The present application arranges a stripping plate in the cavity of the upper die base and a stripping plate on the outer side of the core of the lower die base, so that when the mold is opened, the inner side of the molded product is stripped by the stripping plate of the upper die base, and the outer side of the product is stripped by the stripping plate of the lower die base, and the stripping plates on both sides are opened simultaneously with the mold opening, so that the molded product is evenly stressed and can be smoothly stripped from the cavity without deformation and damage. The stripping is simple and fast, thereby improving the quality and production efficiency of the stretching product.
[0018] 2. Based on the above, the present application provides guide rods on the stripping plates of the two mold bases, and a limiter is provided at one end of the guide rod. The guide rod is used to ensure that the stripping plate slides stably during the stripping process to ensure the stripping quality. The limiter is used to limit the sliding stroke of the stripping plate to avoid excessive or insufficient sliding of the stripping plate, resulting in the inability to effectively strip the product.
[0019] 3. On the basis of the above, the present application sets a nitrogen spring as the power part of the stripping plate on the lower die base to achieve stable material fluidity during the product stretching process to ensure the molding effect, and when stripping, the stripping plate slides stably to ensure the stripping quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic structural diagram of the stretching die of this embodiment. DETAILED DESCRIPTION
[0021] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the protection scope of the specific request of the utility model.
[0022] The technical solution adopted in the present application is shown in the figure, which is a stretching mold, including two mold bases forming a stretching cavity and a stripping assembly. The two mold bases are concave and convex mold structures, and each mold base is respectively provided with a stripping assembly, and the stripping assembly includes a stripping plate 1 and a power member. The stripping plate 1 is slidably installed on the mold base, and the stripping plate on the mold base with a convex mold structure is provided with a cavity for accommodating the convex mold; the power member is used to drive the stripping plate to strip the product from the stretching cavity.
[0023] The two mold bases of this embodiment include an upper mold base 2 and a lower mold base 3, and the upper mold base is provided with a concave mold plate 4, and a cavity for forming the inner shape of the product, and the lower mold base 3 is provided with a convex mold plate 5, and a core 6 for forming the outer shape of the product; when the upper mold base 2 and the lower mold base 3 are molded together, a stretching cavity is formed between the cavity and the core. The upper mold base 2 of this embodiment includes an upper support plate 20, an upper pad 21 and a concave mold fixing plate 22; the concave mold fixing plate 22 is fixedly installed on the upper support plate 20 through the upper pad 21; the concave mold plate 4 is fixedly installed on the concave mold fixing plate; the stripper plate 1 is slidably installed in the cavity of the concave mold plate; the power part is fixedly installed on the upper support plate, and its power end is connected to the stripper plate. Among them, a first guide hole is opened on the concave mold fixing plate 22, and the first guide hole is connected to the cavity of the concave mold plate 4; a first guide rod 23 is provided on the stripper plate 1 at a position corresponding to the first guide hole, and the first guide rod 23 is slidably installed in the first guide hole. In addition, one end of the first guide rod away from the concave template cavity passes through the first guide hole and extends to the outside of the first guide hole to form a first extension end; the end of the first extension end is provided with a limiting portion whose size is larger than the aperture of the first guide hole.
[0024] The lower die base 3 of the present embodiment includes a lower support plate 30, a lower pad 31 and a punch fixing plate 32; the punch fixing plate 32 is fixedly mounted on the lower support plate 30 through the lower pad 31; the punch plate 5 is fixedly mounted on the punch fixing plate 32; the stripper plate 1 is slidably mounted on the outer side of the core of the punch plate 5; the power member is fixedly mounted on the lower support plate, and its power end is connected to the stripper plate. Among them, the positions corresponding to the punch fixing plate 32 and the stripper plate 1 are respectively provided with second guide rods 33, and the positions corresponding to the second guide rods are provided on the stripper plate, and the second guide rods are slidably mounted on the second guide holes. At the same time, the end of the second guide rod of the present embodiment away from the punch fixing plate passes through the second guide hole and extends to the outer side of the second guide hole to form a second extension end; the end of the second extension end is provided with a limiting portion whose size is larger than the aperture of the second guide hole.
[0025] In addition, the power member on the upper support plate 20 of this embodiment is a compression spring 24, and the number is two; the upper pad 21 is provided with a first through hole at the position corresponding to the compression spring 24, and the power end of the compression spring passes through the first through hole and is connected to the stripping plate. The power member on the lower support plate 30 of this embodiment is a nitrogen spring 34; the punch fixing plate 32 is provided with a second through hole, and a push plate 35 is slidably installed in the second through hole, and a push rod 36 is fixedly installed at one end of the push plate facing the stripping plate, and the other end is connected to the power end of the nitrogen spring.
[0026] Working principle: When the stretching die of this embodiment is working, the operator first installs the first guide rod and the second guide rod according to the stretching requirements of the product to adjust the sliding stroke of the stripper plate, that is, adjust the stripper stroke. Then the operator installs the stretching die into the stamping equipment. Among them, the upper die seat is installed on the upper punch head to form a movable die, and the lower die seat is installed on the lower punch head to form a fixed die.
[0027] When the product is stretched, the product blank is placed on the end face of the stripper plate of the lower die seat. At this time, since the nitrogen spring is not compressed, the stripper plate is higher than the core of the punch plate. Then the upper punch head of the punching machine drives the upper die seat to punch and close the mold towards the lower die seat. When the upper die seat and the lower die seat are closed, a stamping cavity is formed between them. Under the action of the punching pressure, the product blank is formed into a molded product in the stamping cavity. At the same time, it should be noted that during the closing process, the stripper plates of the upper die seat and the lower die seat are pushed to slide to both sides in the cavity respectively when the mold is closed, and the compression spring of the upper die seat and the nitrogen spring of the lower die seat are also compressed and stored. After the stamping is completed, the punching machine drives the upper punch head to reset and open the mold. During this process, the inner side of the molded product is stripped by the stripper plate of the upper mold base, and the outer side of the product is stripped by the stripper plate of the lower mold base. The stripper plates on both sides are opened simultaneously when the mold is opened, so that the molded product is evenly stressed and can be smoothly stripped from the cavity without deformation or damage. Finally, the molded product is placed on the end face of the stripper plate of the lower mold base and can be taken away by the material removal equipment or the operator.
[0028] The implementation methods of the present application are described in detail above in conjunction with the embodiments, but the present application is not limited to the above-mentioned implementation methods. For ordinary technicians in this technical field, after knowing the contents recorded in the present application, they can make several equivalent changes and substitutions thereto without departing from the principles of the present application, and these equivalent changes and substitutions should also be regarded as belonging to the protection scope of the present application.
Claims
1. A drawing die, comprising two die bases forming a drawing cavity and a stripping assembly, characterized in that: The two die bases are of concave-convex die structure, and each die base is provided with a stripping assembly, which includes a stripping plate and a power part. The stripping plate is slidably installed on the die base, and the stripping plate on the die base with a male die structure is provided with a cavity for accommodating the male die; the power part is used to drive the stripping plate to strip the product from the stretching cavity.
2. A stretching die according to claim 1, characterized in that: The two mold bases include an upper mold base and a lower mold base, and the upper mold base is provided with a concave mold base and a cavity for forming the inner shape of the product, and the lower mold base is provided with a convex mold base and a core for forming the outer shape of the product; when the upper mold base and the lower mold base are closed, a stretching cavity is formed between the cavity and the core.
3. A stretching die according to claim 2, characterized in that: The upper die base includes an upper supporting plate, an upper pad and a die fixing plate; the die fixing plate is fixedly mounted on the upper supporting plate through the upper pad; the die plate is fixedly mounted on the die fixing plate; the stripper plate is slidably mounted in the cavity of the die plate; the power part is fixedly mounted on the upper supporting plate, and its power end is connected to the stripper plate.
4. A stretching die according to claim 3, characterized in that: A first guide hole is provided on the die fixing plate, and the first guide hole is connected to the cavity of the die plate; a first guide rod is provided on the stripping plate at a position corresponding to the first guide hole, and the first guide rod is slidably installed in the first guide hole.
5. A stretching die according to claim 4, characterized in that: One end of the first guide rod away from the cavity of the concave template passes through the first guide hole and extends to the outside of the first guide hole to form a first extension end; the end of the first extension end is provided with a limiting portion whose size is larger than the aperture of the first guide hole.
6. A stretching die according to claim 2, characterized in that: The lower die base includes a lower supporting plate, a lower pad and a punch fixing plate; the punch fixing plate is fixedly mounted on the lower supporting plate through the lower pad; the punch template is fixedly mounted on the punch fixing plate; the stripper plate is slidably sleeved on the outer side of the core of the punch template; the power part is fixedly mounted on the lower supporting plate, and its power end is connected to the stripper plate.
7. A stretching die according to claim 6, characterized in that: Second guide rods are respectively provided at positions corresponding to the punch fixing plate and the stripping plate, and second guide holes are provided at positions corresponding to the second guide rods on the stripping plate, and the second guide rods are slidably installed in the second guide holes.
8. A stretching die according to claim 7, characterized in that: One end of the second guide rod away from the punch fixing plate passes through the second guide hole and extends to the outside of the second guide hole to form a second extension end; the end of the second extension end is provided with a limiting portion whose size is larger than the aperture of the second guide hole.
9. A stretching die according to claim 3, characterized in that: The power parts on the upper support plate are compression springs, and there are several of them; first through holes are respectively provided at positions of the upper pad corresponding to the compression springs, and the power ends of the compression springs pass through the first through holes and are connected to the stripping plate.
10. A stretching die according to claim 6, characterized in that: The power part on the lower support plate is a nitrogen spring; a second through hole is opened on the punch fixing plate, a push plate is slidably installed in the second through hole, a push rod is fixedly installed on one end of the push plate facing the stripping plate, and the other end is connected to the power end of the nitrogen spring.