A bidirectional slide rail side-cutting system for separating display screen front frame products from waste materials

Abstract

This invention relates to the field of stamping die technology and discloses a bidirectional slide rail side-cutting system for separating display screen front frame products from waste materials. The system includes: an upper die assembly and a lower die assembly, which are capable of relative opening and closing; at least one set of side-cutting units disposed on the lower die assembly, each set of side-cutting units including: a slide rail assembly slidably mounted on the lower die assembly for supporting the product to be stamped and flexibly pressing it; a cutting punch mounted on the slide rail assembly for performing the stamping action; and at least one set of drive components. This invention cleverly decomposes and converts the longitudinal stamping force of traditional stamping dies into transverse side-cutting force through the inclined surface cooperation between the drive components and the slide rail assembly. This force conversion makes the stamping action smoother, avoiding the deformation risk caused by longitudinal impact on thin-walled products, and solving the problem of unstable product dimensions from a mechanical perspective.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and more specifically, to a side-cutting system for separating display screen front frame products from scrap on a continuous strip, particularly a bidirectional slide rail side-cutting system capable of converting longitudinal stamping force into transverse side-cutting force and achieving flexible clamping. Background Technology

[0002] In the mass production of hardware components such as display screen front frames, a continuous stamping process is typically used. This means that the product is formed through multiple stamping processes on a strip of material, and finally, a cutting process separates the product from the scrap material. Figure 13 The product shown is a display screen front frame with a special bezel structure.

[0003] However, these products face a long-standing technical challenge in traditional cut-and-form processes: poor dimensional stability, which hinders mass production. The specific analysis is as follows: 1. Traditional punching methods are prone to deformation of thin-walled parts: The front frame of the display screen is mostly a thin-walled structure with weak rigidity. The traditional material cutting method usually uses punches and dies to directly punch. The impact force generated at the moment of punching can easily cause the product to deform and twist, affecting the final flatness and contour of the product, resulting in dimensional instability. 2. Rigid contact can easily damage the product surface: In traditional mold structures, components such as pressure plates and stripper plates are in rigid contact with the product. For display screen front frame products with high surface quality requirements, this rigid contact can easily leave indentations, scratches or bumps on the product surface, affecting the product's appearance quality. 3. Traditional molds have complex structures and are difficult to adjust: Conventional stamping punches and dies are assembled in the template. The accuracy of the punching position needs to be ensured by the template guide pillars and guide sleeves. When the product size changes or the punching position needs to be adjusted, it is often necessary to reprocess the template or replace the entire mold. The adjustment cycle is long and the cost is high, which cannot meet the needs of rapid response mass production. 4. Low efficiency of single punching: For products with multiple connection points (such as four corner strips), traditional molds often require multiple punchings or complex linkage mechanisms to complete the separation of all strip points, which affects production efficiency.

[0004] Therefore, there is an urgent need to develop a dedicated cutting system that can achieve flexible clamping, precise side cutting, and easy adjustment in order to solve the problem of dimensional stability in the mass production process of display screen front frame products. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of existing display screen front frame products in terms of unstable dimensions, easy deformation, and easy damage during material cutting and forming, and to provide a bidirectional slide rail side cutting system that can convert longitudinal punching force into transverse side cutting force, achieve flexible clamping, and has high punching accuracy.

[0006] This invention proposes a bidirectional sliding rail side-cutting system for separating display screen front frame products from waste materials, comprising: An upper mold assembly and a lower mold assembly, wherein the upper mold assembly and the lower mold assembly are capable of opening and closing relative to each other; At least one set of side-cutting units is disposed on the lower mold assembly, and each set of side-cutting units includes: The slide rail assembly is slidably mounted on the lower die assembly to support the product to be punched and to flexibly press it. A blanking punch, mounted on the slide rail assembly, is used to perform a punching action; At least one set of driving components is disposed on the upper mold assembly and corresponds one-to-one with the side cutting unit, used to convert the longitudinal movement of the upper mold into the lateral movement of the slide rail assembly and the material cutting punch when the mold is closed; The slide rail assembly includes at least two relatively sliding slider components connected by an elastic element. The elastic element is compressed during the mold closing process to achieve flexible clamping of the product.

[0007] The bidirectional slide rail side-cutting system for separating display screen front frame products from waste materials proposed in this invention has the following beneficial effects: 1. By using the inclined surfaces of the drive component and the slide rail component, the longitudinal punching force of the traditional stamping die is cleverly decomposed and converted into the transverse side cutting force. This force conversion makes the punching action more stable, avoids the risk of deformation caused by longitudinal impact on thin-walled products, and solves the problem of unstable product dimensions from the perspective of mechanical principles. 2. The elastic elements (such as return springs) in the slide rail assembly are compressed during the mold closing process, generating a flexible clamping force on the product. This flexible clamping method, rather than rigid clamping, can effectively absorb the vibration during the punching process, avoid the product from being damaged, dented or deformed due to rigid contact, and significantly improve the appearance quality of the product. 3. By simultaneously applying driving force to both ends of the slide rail assembly through the first and second side push blocks, bidirectional synchronous driving is achieved. This design ensures that the product is subjected to uniform force and is clamped stably when being punched, without any skewing or displacement, thus guaranteeing high precision in the punching position. 4. The side-cutting unit adopts a modular design and is installed on the lower mold assembly, which makes it easy to adjust the position or replace the whole according to the product size. Compared with traditional molds that require the entire template to be replaced, the adjustment cycle of this invention is short and the cost is low. It can quickly respond to product change requirements and greatly improve the flexibility of production. 5. By setting up multiple sets of side-cutting units (such as four sets distributed in four corners) and cooperating with the material belt stepping conveyor, it is possible to simultaneously punch multiple material points of two products in one mold closing process. After the mold opens, the material belt advances one step, and the mold closes again to punch the material points on the other side. This staggered punching method makes full use of the mold closing stroke and improves production efficiency. 6. The cutting punch in the slide rail assembly is precisely matched with the sliding hole on the stabilizing block to ensure the accurate movement direction of the punch. At the same time, the floating pin and limiting post on the lower die assembly perform multi-level positioning of the strip, effectively preventing the strip from deviating during the conveying process and ensuring the repeatability of the punching position each time.

[0008] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the mold-closing structure from a first-view perspective of the present invention; Figure 2 This is a schematic diagram of the mold opening structure from a first-view perspective of the present invention; Figure 3 This is a schematic diagram of the mold opening structure from a second perspective of the present invention; Figure 4 This is a top view of the lower mold structure of the present invention; Figure 5 This is a three-dimensional structural diagram of the lower mold, its feeding strip, and the product of the present invention; Figure 6 This is a schematic diagram of the combined structure of the drive component and the slide rail side-cutting component of the present invention; Figure 7 This is a three-dimensional structural schematic diagram of the lower mold and its upper slide rail side cutting assembly of the present invention; Figure 8 This is an exploded structural diagram of the drive assembly and the slide rail side-cutting assembly of the present invention; Figure 9 This is a schematic diagram showing the mold opening state of the drive component and the slide rail side cutting component of the present invention; Figure 10 This is a schematic diagram of the mold-closing state of the drive component and the slide rail side-cutting component of the present invention; Figure 11 This is a partial structural schematic diagram of the slide rail side-cutting component of the present invention; Figure 12This is a three-dimensional structural diagram of the lower mold and its buoyancy pin in one embodiment of the present invention; Figure 13 This is a schematic diagram of the material strip and product of the present invention.

[0010] Figure Descriptions: 1. Upper mold assembly; 2. Lower mold assembly; 3. Side cutting unit; 31. Side slide rail pressure block; 32. End slide rail pressure block; 321. Slot; 33. Slide rail stop; 34. Guide post; 35. Punch pad; 36. Punch fixing block; 37. First slide rail; 38. Second slide rail; 39. Cut-off punch; 4. Drive assembly; 41. First side push block; 42. Second side push block; 5. Elastic element; 6. Floating pin; 7. Limiting post. Detailed Implementation

[0011] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0012] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0013] Please see Figures 1 to 13 The bidirectional sliding rail side-cutting system for separating display screen front frame products from waste materials proposed in this invention mainly includes four core parts: upper mold assembly 1, lower mold assembly 2, side-cutting unit 3, and driving assembly 4. The side-cutting unit 3 is installed on the lower mold assembly 2, and the driving assembly 4 is installed on the upper mold assembly 1. The driving assembly 4 and the side-cutting unit 3 are correspondingly arranged.

[0014] In this embodiment, as Figure 2 , Figures 4-7 As shown, there are four side-cutting units 3 distributed in four corners. The number of drive components 4 is the same as the number of side-cutting units 3 and corresponds one-to-one. The two side-cutting units 3 located on both sides of the conveying direction of the material belt form a group. The two groups of side-cutting units 3 correspond to the two corners of the two long sides of the product, and the side-cutting points of the four side-cutting units 3 are far apart from each other, corresponding to the four material carrying points of the product. Each group of side-cutting units 3 corresponds to the waste side-cutting of one product.

[0015] In this embodiment, the upper mold assembly 1 and the lower mold assembly 2 constitute the basic frame of the mold. The two can open and close relative to each other. The upper mold assembly 1 is fixed on the punch press slide and moves up and down with the slide. The lower mold assembly 2 is fixed on the punch press worktable. The lower end of the upper mold assembly 1 is equipped with a drive assembly 4, and the upper end of the lower mold assembly 2 is equipped with a side cutting unit 3.

[0016] As a preferred option, the upper end of the lower mold assembly 2 is also equipped with a floating pin 6 and a limiting post 7 for positioning and supporting the material strip; like Figure 12 As shown, the floating pins 6 are symmetrically distributed on both sides of the material belt, and there are multiple of them. They are evenly spaced along the direction of material belt travel. The upper outer edge of the floating pin 6 is provided with a groove that matches the side of the material belt. The side of the material belt passes through the upper groove of multiple floating pins 6. This design can not only initially limit the material belt and prevent it from shifting to the left or right, but also does not affect the traction of the material belt, which is convenient for automated operation. The upper end of the lower mold assembly 2 is also equipped with multiple limiting pins 7 located inside the floating pin 6 and staggered, which are used to support the small hole between two products on the strip. When the mold is closed, the positioning pin at the lower end of the upper mold assembly 1 passes through the small hole on the product and cooperates with the limiting pins 7 to achieve precise positioning of the strip.

[0017] The side-cutting unit 3 is the core execution component of this invention, used for flexibly pressing and laterally punching the product.

[0018] Specifically, such as Figures 8-11 As shown, in this embodiment, the side cutting unit 3 includes a side slide rail pressure block 31, an end slide rail pressure block 32, and a slide rail stop block 33, which are fixedly installed on the upper end of the lower mold assembly 2. There are two side slide rail pressure blocks 31, which are arranged opposite to each other to form a slide rail sliding channel. The end slide rail pressure block 32 and the slide rail stop block 33 are respectively located outside the two openings of the slide rail sliding channel. The slide rail stop 33 has two guide posts 34 extending horizontally towards the end slide rail pressure block 32, installed on the side near the slide rail sliding channel. These guide posts 34 are parallel to each other, and multiple slider components are slidably mounted on both guide posts 34, arranged sequentially from the slide rail stop 33 to the end slide rail pressure block 32. These components include: Punch pad 35: As the first slider component, it is slidably mounted on the guide post 34, and one side of it is adjacent to the slide rail stop 33; Punch fixing block 36: As a second slider component, it is slidably mounted on the guide post 34 and adjacent to the punch pad block 35; First slide rail 37: As the third slider component, it is slidably mounted on guide post 34 and located between punch fixing block 36 and second slide rail 38; Second slide rail 38: As the fourth slider component, it is slidably mounted on guide post 34, with one side adjacent to end slide rail pressure block 32; The cutting punch 39 is installed on the upper part of the punch fixing block 36 near the first slide rail 37, parallel to the guide post 34. A stabilizing block is installed on the upper end of the first slide rail 37. The inside of the stabilizing block is horizontally opened with a sliding hole that corresponds to and matches the position of the cutting punch 39. The end of the cutting punch 39 away from the punch fixing block 36 is a free end, which is slidably assembled with the sliding hole. In the mold opening state, the free end of the cutting punch 39 is flush with the opening of the sliding hole near the second slide rail 38. Furthermore, the end of the stabilizing block at the upper end of the first slide rail 37 near the second slide rail 38 is designed as an arc shape, which matches the arc segment inside the corner of the product, thereby improving the clamping stability of the product. Furthermore, the elastic element 5 is disposed between the slider components. Specifically, the first slide rail 37 has grooves on both sides, and the elastic element 5 is arranged in the grooves on both sides. In this embodiment, a return spring is preferred. One end of the elastic element 5 is connected to the first slide rail 37, and the other end abuts against the adjacent punch fixing block 36 or the second slide rail 38. Utilizing the elasticity of the elastic element 5, one side of the elastic element 5 presses the punch fixing block 36 against the side of the punch pad block 35, and restricts the punch pad block 35 from moving outward through the slide rail stop block 33; at the same time, the other side of the elastic element 5 presses the second slide rail 38 against the end slide rail pressure block 32, and restricts the second slide rail 38 from moving outward through the end slide rail pressure block 32. Furthermore, two grooves are provided on both sides of the first slide rail 37, and an elastic element 5 is arranged in each groove. The two elastic elements 5 located on the same side are symmetrically distributed. This design is beneficial to improving the sliding stability of the punch pad 35, the punch fixing block 36, the first slide rail 37 and the second slide rail 38.

[0019] In a preferred embodiment, such as Figure 11 As shown, there are two end slide rail pressure blocks 32, which are symmetrically distributed on both sides of the second slide rail 38. The side of the end slide rail pressure block 32 near the end of the second slide rail 38 is designed with an inner right angle, which can effectively limit the second slide rail 38 and prevent the second slide rail 38 from moving outward excessively under the action of the elastic element 5. Furthermore, the upper end face of the end slide rail pressure block 32 is provided with a slot 321 located outside the second slide rail 38. The slot 321 is L-shaped and its inner corner is connected to the inner right angle of the end slide rail pressure block 32, which is used to accommodate a part of the drive assembly 4 when the mold is closed.

[0020] The drive component 4 is installed on the upper mold component 1 and corresponds one-to-one with the side cutting unit 3. It is used to convert the longitudinal movement of the upper mold into the power to drive the lateral movement of the slider component when the mold is closed.

[0021] Specifically, such as Figures 8-11 As shown, the drive component 4 includes a first side push block 41 and a second side push block 42, which serve as examples of the first drive block and the second drive block. Both the upper ends of the punch pad 35 and the second slide rail 38 are provided with inclined surfaces. The bottom of the inclined surface at the upper end of the punch pad 35 faces the slide rail stop 33, and the bottom of the inclined surface at the upper end of the second slide rail 38 faces the end slide rail pressure block 32. The lower end of the first side push block 41 has an inclined surface that is parallel to and opposite to the inclined surface at the upper end of the second slide rail 38, and the lower end of the second side push block 42 has an inclined surface that is parallel to and opposite to the inclined surface at the upper end of the punch pad 35. In this embodiment, there are two first side push blocks 41, which are located above the two slots 321 respectively. When the first side push block 41 moves down to the end of its stroke, the lower end of the first side push block 41 is inserted into the slot 321 to achieve precise fit. The dual-sided drive of the two first side push blocks 41 can improve the clamping stability.

[0022] The working process and principle of this invention are as follows: Step 1: Initial State like Figure 9 As shown, in the mold-opening state, the upper mold assembly 1 and the lower mold assembly 2 are separated. The strip is conveyed forward by one step under the guidance of the floating pin 6, so that the four material-carrying points of the next group of products are respectively located between the upper stable block of the first slide rail 37 and the inner side of the upper end of the second slide rail 38 of the four side cutting units 3. At this time, the cutting position of the material-carrying point is opposite to the free end of the cutting punch 39.

[0023] Step 2: Mold Closing Drive and Flexible Clamping like Figure 10 As shown, during mold closing, the upper mold assembly 1 drives the drive assembly 4 to move down synchronously, and the first side push block 41 and the second side push block 42 move down synchronously, respectively pressing the second slide rail 38 and the punch pad 35. By utilizing the guiding effect of the inclined surface, the longitudinal punching force of mold closing is decomposed onto the second slide rail 38 and the punch pad 35, realizing the conversion of longitudinal force to transverse force. Specifically: The lower end of the first side push block 41 is inserted into the gap between the second slide rail 38 and the end slide rail pressure block 32, causing the second slide rail 38 to slide towards the first slide rail 37. The lower end of the second side push block 42 is inserted into the gap between the punch pad block 35 and the slide rail stop block 33, pushing the punch pad block 35 and the punch fixing block 36 closer to the first slide rail 37. During the movement of the punch pad 35 and the second slide rail 38, the elastic elements 5 on both sides of the first slide rail 37 are compressed, generating elastic deformation. This elastic deformation transmits clamping force, achieving flexible clamping of the product corners, reducing the risk of the product being damaged or deformed due to rigid contact, and preparing the product for cutting.

[0024] Step 3: Horizontal punching When the first slide rail 37 and the second slide rail 38 are fully pressed against the product, the cutting punch 39 moves relative to the first slide rail 37. As the punch fixing block 36 continues to move closer to the first slide rail 37, and the first slide rail 37 remains relatively stable under the action of the elastic element 5, the free end of the cutting punch 39 gradually extends out from the sliding hole of the stabilizing block and performs transverse punching on the material point at the corner of the product. After the punching is completed, the product is separated from the material strip, and the side cutting process is completed.

[0025] Step 4: Mold opening and resetting After punching is completed, the upper die assembly 1 rises, and the drive assembly 4 rises accordingly. The first side push block 41 and the second side push block 42 disengage from the second slide rail 38 and the punch pad 35. Under the reset action of the elastic element 5, the punch pad 35, the punch fixing block 36, the first slide rail 37 and the second slide rail 38 slide in the opposite direction along the guide post 34 and return to the initial position. The strip is then conveyed forward one step again to start the next cycle.

[0026] In this embodiment, since four sets of side cutting units 3 are set and distributed at the four corners, the four material points of two products can be punched simultaneously in one mold closing process, that is, the two corners of each product. After the mold opens, the material strip advances the distance of one product, and the mold closes again to realize the punching of the two material points on the other side of the two products. This staggered punching method makes full use of the mold closing stroke and improves production efficiency.

[0027] The scope of protection of this invention is not limited to the specific embodiments described above. Several typical variations are listed below, all of which fall within the scope of protection of this invention: Variation 1: Changes in the number of lateral cutting units Depending on the product shape and the number of material-carrying points, the number of side-cutting units 3 can be adjusted accordingly. For example, for a product with only two material-carrying points, two sets of side-cutting units can be set; for a product with six material-carrying points, six sets of side-cutting units can be set.

[0028] Variation 2: Changes in the number of slider components The number of slider components is not limited to the four in this embodiment (punch pad, punch fixing block, first slide rail, second slide rail). Depending on different punching requirements and spatial layout, two, three or more slider components can be set, as long as they can achieve elastic clamping and lateral movement of the cutting punch.

[0029] Variation 3: Alternative Forms of Elastic Elements The elastic element 5 is not limited to a return spring, but can also be other elements that can provide elastic force, such as elastic rubber pillars, disc springs, and nitrogen springs. The arrangement of the elastic element is not limited to both sides of the first slide rail, and can be set between other slider components as needed.

[0030] Variation 4: Alternative Forms of Driver Components The drive component 4 is not limited to the separate structure of the first side push block and the second side push block. It can also be an integrated drive block, which cooperates with the inclined surfaces on multiple slider components. The cooperation method between the drive block and the slider components is not limited to the inclined surface cooperation. Other mechanisms that can convert longitudinal motion into lateral motion, such as cam mechanism and crank-slider mechanism, can also be used.

[0031] Variation 5: Changes in Guiding Method The guide method of the slider is not limited to the guide post 34 guide. Other linear guide structures such as linear guide rails and dovetail grooves can also be used. The number of guide posts can be set to one or more as needed.

[0032] Variation 6: Expansion of Application Areas The application of this invention is not limited to the side cutting of waste materials for the front frame of a display screen. It can also be extended to the punching and separation of other thin-walled hardware and plastic parts, especially for punching and processing of products with high surface quality requirements and easy deformation.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bidirectional slide rail side cutting system for separating display screen bezel products from waste material, characterized in that, The application relates to a side cutting die assembly for cutting a product, comprising: an upper die assembly and a lower die assembly, the upper die assembly and the lower die assembly being relatively openable and closable; at least one set of side cutting units arranged on the lower die assembly, each set of side cutting units comprising: a slide rail assembly slidably mounted on the lower die assembly and used for carrying and pressing the product to be cut; a cutting punch mounted on the slide rail assembly and used for performing a cutting action; at least one set of driving assemblies arranged on the upper die assembly and corresponding to the side cutting units one by one, and used for converting the longitudinal movement of the upper die into the transverse movement of the slide rail assembly and the cutting punch when the die is closed; wherein the slide rail assembly comprises at least two slide block members which are relatively slidable, and the slide block members are connected through elastic elements, the elastic elements being compressed during the die closing process to realize flexible clamping of the product.

2. The bidirectional slide rail side cutting system for separating the front frame product of a display screen from waste material according to claim 1, wherein, The driving assembly comprises at least one driving block, the driving block has a matching inclined surface corresponding to an inclined surface arranged on the slide block member, and the longitudinal movement is converted into the transverse movement through the inclined surface matching.

3. The bidirectional slide rail side cutting system for separating the front frame product of a display screen from waste material according to claim 2, characterized in that, The driving assembly comprises a first driving block and a second driving block, the first driving block and the second driving block are matched with the inclined surfaces on the different slide block members at the two ends of the slide rail assembly respectively, and bidirectional synchronous driving is realized.

4. The bidirectional slide rail side cutting system for separating the front frame product of a display screen from waste material according to claim 1, wherein, The slide rail assembly further comprises at least one guide member, and the slide block members are slidably mounted on the guide member.

5. The bidirectional slide rail side cutting system for separating the front frame product of a display screen from waste material according to claim 4, wherein, The guide member is a guide column or a linear guide rail.

6. The bidirectional slide rail side cutting system for separating the front frame product of a display screen from waste material according to claim 1, wherein, The slide block member comprises: a first slide block member matched with a part of the driving assembly; a second slide block member matched with another part of the driving assembly; a third slide block member arranged between the first slide block member and the second slide block member, and the elastic element is arranged between the third slide block member and the first slide block member and between the third slide block member and the second slide block member.

7. The bidirectional slide rail side cutting system for separating the front frame product of a display screen from waste material according to claim 6, wherein, The cutting punch is mounted on the first slide block member, and a guide hole matched with the cutting punch is arranged on the third slide block member.

8. The bidirectional slide rail side cutting system for separating the front frame product of a display screen from waste material according to claim 1, wherein, A material belt positioning mechanism is further arranged on the lower die assembly and used for positioning and guiding the material belt in conveying.

9. The bidirectional slide rail side cutting system for separating the front frame product of a display screen from waste material according to claim 8, wherein, The material belt positioning mechanism comprises: floating pins distributed along the material belt advancing direction and used for supporting the side of the material belt and limiting the transverse deviation of the material belt; limiting columns used for cooperating with positioning members on the upper die assembly to realize accurate positioning when the die is closed.

10. The bidirectional slide rail side cutting system for separating display screen bezel products from waste material of claim 1, wherein, The side cutting units are arranged in four sets and are distributed in a quadrangle, and correspond to four material belt points of the product respectively.

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