Lower die assembly and stamping die

Abstract

The lower die assembly comprises a lower die body and a material ejecting mechanism, the lower die body is provided with a concave cavity and a material guiding groove, the upper end face of the lower die body is provided with a stamping hole communicated with the concave cavity, one end of the material guiding groove is communicated with the concave cavity, and the other end of the material guiding groove is obliquely arranged from top to bottom in the height direction of the lower die body; the material ejecting mechanism comprises a material ejecting part, the material ejecting part is arranged in the concave cavity and located under the stamping hole, and the material ejecting part is constructed to protrude out of the inner wall of the concave cavity and provides eccentric supporting for the material pieces falling from the stamping hole so that the material pieces can enter the material guide groove in an inclined state. Due to the fact that the material ejecting piece eccentrically supports the material pieces, the material pieces obliquely move and obliquely flow out of the lower die assembly along the material guiding groove, waste discharging is completed, and the situation that the die is blocked due to accumulation of the material pieces is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a lower mold assembly and a stamping mold. Background Technology

[0002] For metal stamping dies involving edge trimming, the relevant technology processes a discharge hole in the lower die. After punching, the material pieces fall under the pressure of the punch and gravity. Because the vertically falling material pieces tend to accumulate, especially larger pieces, when they accumulate to a certain quantity and are not cleaned in time, the material pieces become stuck in the discharge hole layer by layer, causing blockage of the die's discharge hole. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a lower die assembly and a stamping die using the lower die assembly, which solves the problem that after stamping, the vertically falling material sheets accumulate in the waste discharge hole, causing blockage of the die.

[0004] According to a first aspect embodiment of the present invention, the lower mold assembly includes:

[0005] The lower die body has a cavity and a guide groove. The upper end face of the lower die body has a punching hole that communicates with the cavity. The guide groove communicates with the cavity and is inclined from top to bottom along the height direction of the lower die body.

[0006] The ejector mechanism includes an ejector component disposed within the cavity and directly below the punching hole. The ejector component is configured to protrude from the inner wall of the cavity and provide eccentric support for the material sheet falling from the punching hole, so that the material sheet enters the guide groove in an inclined state.

[0007] The lower mold assembly according to the first aspect of the present invention has at least the following beneficial effects:

[0008] The lower die assembly serves as the lower die of the stamping die. A connected cavity and guide groove are provided within the lower die body. The cavity is connected to the stamping hole, and the guide groove is inclined downwards along the height of the lower die body. A top material is placed within the cavity, directly below the stamping hole. During stamping, the punch cuts the sheet metal, producing a sheet of material. This sheet falls along the stamping hole, enters the cavity, and contacts the top material. Due to the eccentric support provided by the top material, the angle of the sheet tilts towards the guide groove. The sheet changes from vertical to oblique movement and flows obliquely out of the lower die assembly along the guide groove, facilitating the removal of the sheet and preventing it from accumulating in the cavity, effectively reducing the likelihood of sheet blockage of the stamping hole.

[0009] According to some embodiments of the present invention, on a projection plane perpendicular to the height direction of the lower die body, the projection of the top material and the projection of the stamping hole are spaced apart at the center, and along the inclined direction of the guide groove, the top material is located on the side of the cavity away from the guide groove.

[0010] According to some embodiments of the present invention, the cavity has a first side and a second side, the first side and the second side are arranged sequentially along the inclined direction of the guide groove, the top material member is disposed close to the first side relative to the second side, and the distance between the top material member and the first side is less than 1 / 3 of the maximum side length of the material sheet.

[0011] According to some embodiments of this utility model, the punching hole is a triangular hole, the cross-sectional shape of the cavity matches the shape of the punching hole, one corner of the triangular hole is a first side corner and is located on the side of the cavity away from the guide groove, and the other two corners are located on the side of the cavity close to the guide groove. On the projection plane perpendicular to the height direction of the lower die body, the distance between the projection of the top material and the projection of the first side corner is less than or equal to 1 / 3 of the maximum side length of the material sheet.

[0012] According to some embodiments of the present invention, the bottom wall of the guide groove is connected to the bottom wall of the concave cavity, and the connection between the connection and the top of the top material is a first connection, wherein the angle between the first connection and the horizontal direction is greater than or equal to 30° and less than or equal to 45°.

[0013] According to some embodiments of this utility model, the top material is a rod, one end of which is fixed to the bottom wall of the cavity, and the other end is disposed toward the punching hole.

[0014] According to some embodiments of the present invention, the ejector mechanism further includes a fastener, the lower mold body is provided with a connecting hole penetrating the bottom wall of the cavity, and one end of the rod passes through the connecting hole and is fixedly connected to the fastener.

[0015] According to some embodiments of the present invention, the lower mold body includes a lower template, a pad, and a mold base. The lower template, the pad, and the mold base are arranged sequentially from top to bottom. The lower template is provided with the punching hole and a cavity communicating with the punching hole. The cavity is defined by the cavity and the upper end face of the pad. The guide groove is at least partially formed on the surface of the pad.

[0016] According to some embodiments of the present invention, the guide groove includes a first slide groove and a second slide groove connected together, the first slide groove being formed at the edge of the pad and the second slide groove being formed at the edge of the mold base.

[0017] A stamping die according to a second aspect of the present invention includes a punch and a lower die assembly as described in the first aspect embodiment, wherein the cross-sectional shape of the punch matches the shape of the stamping hole.

[0018] The stamping die according to the second aspect of the present invention has at least the following beneficial effects:

[0019] When the stamping die adopts the lower die assembly of the first aspect embodiment, the punch cuts the sheet metal during the stamping operation, and the material sheet is produced after punching. The material sheet falls along the stamping hole, enters the cavity and contacts the ejector. Since the ejector provides eccentric support for the material sheet, the angle of the material sheet tilts in the direction of the guide groove. The material sheet changes from vertical falling to oblique movement and flows obliquely out of the lower die assembly along the guide groove, which facilitates the removal of the material sheet and makes it less likely for the material sheet to accumulate in the cavity. This effectively reduces the situation of material sheet blocking the stamping hole and improves the working efficiency of the stamping die.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0021] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the stamping die provided by this utility model;

[0022] Figure 2 This is a side view of an embodiment of the lower mold assembly provided by this utility model;

[0023] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0024] Figure 4 This is a front structural diagram of an embodiment of the lower mold assembly provided by this utility model.

[0025] Figure label:

[0026] 10 stamping dies;

[0027] Sheet metal parts 100; Material sheets 110;

[0028] Punch 200;

[0029] Lower mold assembly 300; lower mold body 310; lower template 311; backing plate 312; mold base 313; punching hole 320; cavity 330; first side 331; second side 332; first corner 333; guide groove 340; first slide groove 341; second slide groove 342; baffle 350; ejector mechanism 360; ejector component 361; protrusion 3611; screw plug 362; bolt 363; nut 3631. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals 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 this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, the use of terms such as "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the technical terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0034] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0035] In metal stamping dies involving edge trimming, existing technology typically incorporates a vertically penetrating discharge hole in the lower die, allowing the cut material sheets to fall under the pressure of the punch and gravity. However, these fallen sheets require manual or pusher cleaning. In this case, the vertically falling sheets tend to accumulate, especially when the sheets are large. If the accumulated sheets are excessive and not cleaned promptly, they can become stuck in the discharge hole, causing blockage. This blockage negatively impacts the normal operation of the stamping process and may even lead to an interruption of the entire stamping operation, affecting production efficiency.

[0036] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The lower die assembly and stamping die provided by this utility model will be described below with specific examples.

[0037] Reference Figure 1 As shown, in this embodiment, the stamping die includes a lower die assembly 300 and a punch 200.

[0038] Understandably, the lower die assembly 300 is responsible for providing a fixed working platform to clamp and fix the sheet metal part 100 and bear the pressure of the punch 200, ensuring that the sheet metal part 100 can be stably placed and positioned during the stamping process. The upper end face of the lower die assembly 300 is provided with a stamping hole 320. The shape of the stamping hole 320 is set according to the actual production needs. For example, the stamping hole 320 can be square, round or other polygonal shapes.

[0039] Specifically, in this embodiment, in order to complete the corner trimming process, the punching hole 320 is a triangular hole, and the sheet metal part 100 with the corner trimmed is made, which is suitable for household appliances such as microwave ovens and ovens.

[0040] Reference Figure 1 As shown, the punch 200 is positioned above the lower die body 310. The shape of the punch 200 matches the punching hole 320. In this embodiment, the stamping die is mainly used for punching sheet metal parts 100. The punch 200 is used to apply pressure to the sheet metal parts 100 to be processed in conjunction with the punching hole 320. After being punched, the sheet metal parts 100 produce a material sheet 110, which is also waste material. It can be understood that when the punching hole 320 is a triangular hole, the material sheet 110 formed by punching is also triangular.

[0041] Specifically, during the stamping process, the sheet metal part 100 is clamped and fixed on the upper end face of the lower die assembly 300. The sheet metal part 100 is located directly below the punch 200. The shape of the punch 200 matches the stamping hole 320. The punch 200 moves in a straight line from top to bottom perpendicular to the upper end face of the lower die assembly 300 until it penetrates the stamping hole 320. The punch 200 presses the sheet metal part 100. The contact part between the sheet metal part 100 and the punch 200 is subjected to a downward stamping force. Other parts of the sheet metal part 100... The sheet metal part 100 is clamped and fixed in its original position. The stamped portion of the sheet metal part 100 undergoes relative displacement with other parts in the vertical direction until the shear stress generated near the punch 200 reaches the breaking stress of the sheet metal part 100. At this point, the sheet metal part 100 fractures along the edge of the punch 200, forming a material sheet 110 that matches the shape and size of the contact surface of the punch 200. The material sheet 110 detaches from the sheet metal part 100 and falls off naturally under the action of gravity, separating from the sheet metal part 100. After completing this stamping process, the punch 200 returns to its initial position, ready for the next stamping cycle. In this way, the stamping task of the sheet metal part 100 can be completed efficiently and accurately.

[0042] The lower mold assembly 300 in this embodiment includes a lower mold body 310 and an ejector mechanism 360.

[0043] Reference Figure 1 As shown, the lower mold body 310 comprises three parts: a lower template 311, a backing plate 312, and a mold base 313. The lower template 311 is movably mounted on the backing plate 312, and the backing plate 312 is fixedly mounted on the mold base 313. The lower template 311, the backing plate 312, and the mold base 313 are arranged sequentially from top to bottom. In some other embodiments, the lower mold body 310 adopts an integrated design, that is, the lower template 311, the backing plate 312, and the mold base 313 are integrated into a single unit.

[0044] In this embodiment, the lower mold body 310 adopts a combination of a lower template 311, a pad 312, and a mold base 313. This allows for the selection of suitable materials for each component based on the usage scenario and production requirements. For example, the lower template 311 and the mold base 313 are made of materials with high structural strength to ensure that the lower template 311 is not easily deformed. Furthermore, the mold base 313 provides more reliable support, making the entire lower mold assembly structure more robust and reliable. The main function of the pad 312 is to prevent direct contact between the lower template 311 and the mold base 313, thereby reducing damage to the lower template 311 caused by excessive pressure, and dispersing pressure by increasing the bearing area. In some embodiments, the pad 312 can be made of a different material than the lower template 311. Therefore, by adopting the above-described combined structure for the lower mold body 310, the durability and reliability of the lower mold body 310 can be improved. Simultaneously, it facilitates the inspection and maintenance of the internal structure of the lower mold body 310, allowing for the replacement of worn components individually without replacing the entire lower mold body 310. This increases the flexibility and adjustability of the entire lower mold body 310 assembly and reduces production costs.

[0045] Reference Figure 1 As shown, the lower template 311 is an important component for completing the cutting process. The punching hole 320 is set on the upper end face of the lower template 311. The punching hole 320 is used to cooperate with the punch 200 to apply pressure to the sheet metal part 100. During the punching process, the punch 200 and the punching hole 320 undergo relative displacement in the vertical direction, squeezing the sheet metal part 100 located between the punch 200 and the punching hole 320, causing stress to be generated in the sheet metal part 100 near the punch 200, causing the sheet metal part 100 to break along the edge of the punch 200, forming a material sheet 110 that matches the shape and size of the contact surface of the punch 200, thus completing the blanking.

[0046] Furthermore, a cavity 330 is provided in the lower template 311. The cavity 330 is connected to the punching hole 320. The cavity 330 extends vertically downward from the punching hole 320. The cavity 330 passes through the lower template 311 and extends to the upper end face of the pad 312. The upper end face of the pad 312 defines the bottom wall of the cavity 330. The cross-section of the cavity 330 matches the shape of the punching hole 320. The cavity 330 reserves space for the movement of the punch 200 and the falling of the generated material sheet 110 during the punching process.

[0047] Reference Figure 1As shown, the pad 312 is disposed between the lower template 311 and the lower die holder 313, serving as a buffer and providing support and protection. The pad 312 has the same shape and size as the lower template 311 and is used in conjunction with the lower template 311. The pad 312 and the lower template 311 are made of different materials. The pad 312 can withstand the stress generated during stamping, preventing the die holder 313 from denting or deforming. At the same time, it provides reliable support for the lower template 311 to prevent damage to the lower template 311 due to excessive stamping force during the stamping operation, thus protecting it.

[0048] Understandably, the mold base 313 is located at the bottom of the lower mold body 310, and its size is larger than that of the lower template 311 and the pad 312. It is used to install the lower template 311 and the pad 312, and plays a supporting and bolstering role for the lower template 311 and the pad 312.

[0049] During the stamping process, the material sheet 110 formed after stamping spreads horizontally when falling vertically. Since the material sheet 110 is prone to accumulating when falling vertically, it is necessary to change the movement direction of the material sheet 110 so that the material sheet 110 slides out at an angle to prevent accumulation. Therefore, a ejector mechanism 360 is provided in the cavity 330. The ejector mechanism 360 protrudes from the inner wall of the cavity 330 to provide eccentric support for the material sheet 110, so that the movement mode of the material sheet 110 is changed from vertical falling to oblique movement, thereby causing the material sheet 110 to slide out at an angle from the lower die assembly.

[0050] Furthermore, the lower mold body 310 is also provided with a guide groove 340. The guide groove 340 is a groove structure that connects the cavity 330 and the outside of the lower mold body 310. It is used to receive and guide the material sheet 110 that moves obliquely by the eccentric support of the ejector mechanism 360. The material sheet 110 is slid out of the lower mold body 310 through the guide groove 340, thereby completing the process of waste material discharge. Figure 1 The direction indicated by the middle arrow is the direction in which the material sheet 110 slides down the guide trough 340.

[0051] Reference Figure 1 and Figure 2 As shown, in this embodiment, the ejector mechanism 360 includes an ejector component 361, which is a rod structure arranged vertically. The cross-sectional area of ​​the ejector component 361 is smaller than the area of ​​the material sheet 110, reducing the contact area between the ejector mechanism 360 and the material sheet 110. This reduces the friction between the material sheet 110 and the ejector mechanism 360, preventing the material sheet 110 from remaining on the ejector mechanism 360 and ensuring its smooth sliding out. One end of the ejector component 361 is fixed to the inner wall of the bottom of the cavity 330, while the other end faces the punching hole 320.

[0052] In other embodiments, the top member 361 can adopt different structural forms, such as a boss or a pillar. In addition, the arrangement direction of the top member 361 can also be adjusted, for example, it can extend obliquely upward from the side wall of the cavity 330 towards the center, as long as it satisfies the need to change the movement trajectory of the material piece 110 so that the material piece 110 can slide out at an angle.

[0053] In order to ensure that the material sheet 110 can be lifted and slide into the guide trough 340 in an inclined state, the top material member 361 extends in a direction perpendicular to the guide trough 340. After the material sheet 110 falls, it makes linear contact with the top material member 361, so that after the material sheet 110 is lifted, it flips and tilts around the contact line under the action of gravity, so that the material sheet 110 moves obliquely towards the guide trough 340.

[0054] Reference Figure 2 and Figure 3 As shown, in some embodiments, the pad 312 is provided with a connecting hole having the same cross-sectional shape as the top material 361. The connecting hole is located on the bottom wall of the cavity 330 and extends vertically, penetrating the pad 312. The connecting hole is used to install the top material 361, which is fitted into the connecting hole. Because the lower template 311 and the pad 312 are movable, the top material 361 can be adjusted and replaced simply by opening the lower template 311, facilitating the inspection and maintenance of the top material mechanism 360 during production.

[0055] In some embodiments, the top-feeding mechanism 360 further includes a fastener. The lower end of the top-feeding component 361 passes through the connecting hole and is fixedly connected to the fastener, thereby locking the top-feeding component 361. Specifically, the fastener is a screw plug 362, which is fixed to the bottom of the pad 312 and positioned opposite the connecting hole. During installation, the lower end of the top-feeding component 361 passes through the connecting hole and is locked with the screw plug 362, facilitating adjustment and replacement of the top-feeding component 361 while improving the reliability and stability of the installation.

[0056] Reference Figure 3 As shown, it should be noted that in this embodiment, a protrusion 3611 is provided on the side wall of the top material 361. The protrusion 3611 extends along the height direction of the rod. The surface of the pad 312 is also provided with a threaded hole. The threaded hole is provided along the height direction of the lower mold body 310. One side of the threaded hole is connected to the connecting hole, and the threaded hole is used to connect the bolt 363. When the top material 361 is assembled into the connecting hole, the bolt 363 is screwed into the threaded hole from top to bottom, and the nut 3631 of the bolt 363 abuts against the protrusion 3611, thereby pressing the top material 361, further fixing and limiting the top material 361, making the structure more reliable.

[0057] Understandably, after being lifted, the tilt angle and direction of movement of the material piece 110 are determined by the position and height of the lifting component 361.

[0058] In order to provide eccentric support to the material sheet 110, the projection of the top material 361 and the center of the projection of the punch hole 320 are spaced apart on the projection plane perpendicular to the height direction. Since the material sheet 110 flips and tilts when it is lifted, the end of the material sheet 110 near the top material 361 tilts upward and the other end tilts downward along the line connecting the center of the projection of the top material 361 and the center of the projection of the punch hole 320. The material sheet 110 slides out tilted towards the guide groove 340. Therefore, the position of the top material 361 must be set on the opposite side of the preset movement direction, that is, on the side away from the guide groove 340.

[0059] Reference Figure 1 As shown, the cavity 330 has a first side 331 and a second side 332, which are arranged sequentially along the inclined direction of the guide groove 340. The top member 361 is positioned closer to the first side 331 than the second side 332. Taking a square shape for both the punch hole 320 and the cavity 330 as an example, the side wall of the cavity 330 away from the guide groove 340 is the first side 331, and the side wall of the cavity 330 closer to the guide groove 340 is the second side 332. The distance between the top member 361 and the first side 331 is smaller than the distance between the top member 361 and the second side 332.

[0060] Specifically, the distance between the top feeder 361 and the first side 331 is less than 1 / 3 of the maximum side length of the material sheet 110. It can be understood that when the material sheet 110 is rectangular, its maximum side length is the length of the material sheet 110 along its length direction; when the material sheet 110 is square, its maximum side length is the length of any side of the material sheet 110. By ensuring that the distance between the top feeder 361 and the first side 331 is less than 1 / 3 of the maximum side length of the material sheet 110, it can be ensured that one end of the material sheet 110 is lifted by the top feeder 361, causing the material sheet 110 to be in an inclined state, and the inclination direction is consistent with the inclination direction of the guide trough 340.

[0061] Reference Figure 4 As shown, in some embodiments, the punching hole 320 is a triangular hole, the cross-sectional shape of the cavity 330 matches the shape of the punching hole 320, the cavity 330 has a first side 331 and a second side 332, the first side 331 and the second side 332 are arranged sequentially along the direction of the guide groove 340, and the angle of the triangular hole located on the first side 331 is the first side angle 333.

[0062] Reference Figure 4As shown, on the projection plane perpendicular to the height direction of the lower die body 310, the length of the longest side of the triangular hole is L1, and the distance between the projection of the top material 361 and the projection of the first corner 333 is L2. It can be understood that, since the shape of the material piece 110 matches the shape of the stamping hole 320, in order to ensure that the material piece 110 moves obliquely in the direction of the guide groove 340, the distance between the projection of the top material 361 and the projection of the first corner 333 is less than or equal to 1 / 3 of the maximum side length of the material piece 110, that is, L2 is less than 1 / 3 of L1. In this way, the material piece 110 is more easily lifted and tilted, thereby ensuring that the material piece 110 slides into the guide groove 340 in an tilted state.

[0063] Reference Figure 3 As shown, regarding the height of the top piece 361, after the material piece 110 is lifted, one end abuts against the connection between the bottom wall of the guide groove 340 and the bottom wall of the cavity 330, and the other end abuts against the top of the top piece 361. The line connecting the connection and the top of the top piece 361 is designated as the first connecting line P1, and the tilt angle of the material piece 110 is the angle between the first connecting line P1 and the horizontal direction P2. It can be understood that the higher the height of the top piece 361, the greater the tilt angle of the material piece 110. The height of the top piece 361 must be specifically set according to the size of the lower die body 310 and the size and shape of the stamping hole 320. If the height is too high, the material piece 110 is prone to tipping over and getting stuck in the cavity 330; if the height is too low, the force of gravity is insufficient to overcome the friction, and the material piece 110 cannot tilt and slide down.

[0064] Specifically, in actual use, when the tilt angle of the material sheet 110 is greater than or equal to 30° and less than or equal to 45°, the material sheet 110 can tilt and slide down more smoothly without tipping over.

[0065] Reference Figure 3 As shown, the angle between the first connecting line P1 and the horizontal direction P2 is α, which satisfies a value greater than or equal to 30° and less than or equal to 45°. That is to say, the tilt angle of the material piece 110 after being lifted satisfies a value greater than or equal to 30° and less than or equal to 45°. It can be understood that the tilt angle can be adjusted according to the height of the lifting component 361. Specifically, α can be 30°, 40°, 45°, etc.

[0066] In this embodiment, the guide groove 340 is inclined from top to bottom along the height direction of the lower mold body 310, so that the material sheet 110 can slide out naturally under the action of gravity. The guide groove 340 is provided with a starting end and an ending end. The starting end is connected to the cavity 330 in the lower mold plate 311, and the ending end of the guide groove 340 is located on the side end face of the mold base 313. The surface of the guide groove 340 is smooth to reduce the friction on the material sheet 110, make it easier to discharge the material sheet 110, and prevent the material sheet 110 from accumulating in the guide groove 340.

[0067] Reference Figure 2 As shown, the guide groove 340 includes a first groove 341 and a second groove 342. The first groove 341 is composed of a groove structure machined on the side edge of the pad 312. The bottom wall of the first groove 341 is connected to the bottom wall of the cavity 330. The second groove 342 is composed of a groove structure located on the edge of the mold base 313. The first groove 341 and the second groove 342 are smoothly connected. The two sides of the guide groove 340 gradually slope outward from top to bottom. The cross-section at the end of the guide groove 340 is larger than the cross-section at the beginning end, so that the material piece 110 is not easily stuck at the guide groove 340, and the material piece 110 is prevented from accumulating at the end of the guide groove 340 and thus blocking the guide groove 340.

[0068] In actual production operations, only a waste bin needs to be set at the end of the guide chute 340. The material piece 110 slides naturally down through the end of the guide chute 340 and enters the waste bin, which completes the collection of the material piece 110. There is no need for manual or pushing devices to clean and collect the material piece 110, which saves manpower and resources and reduces production costs.

[0069] Reference Figure 2 As shown, in order to effectively prevent the material sheet 110 from splashing and detaching from the guide chute 340 during the sliding process, an inclined baffle 350 can be installed above the end of the guide chute 340. The function of the inclined baffle 350 is that when the material sheet 110 splashes during the sliding process, the baffle 350 can effectively guide these splashed material sheets 110 back onto the guide chute 340, thereby ensuring that the material sheet 110 can be smoothly conveyed along the guide chute 340, avoiding damage to the stamping die equipment or operators caused by the splashing of the material sheet 110, and ensuring the smoothness and safety of the entire stamping process.

[0070] In this invention, firstly, the height of the ejector 361 is set according to the dimensions of the lower die body 310 and the size of the material sheet 110; the ejector 361 is fixed by the screw plug 362 and further tightened by the bolt 363 to ensure its stability during the stamping process; when the stamping die is performing the stamping operation, the punch 200 moves downward to punch the sheet metal part 100, thereby producing the material sheet 110; the material sheet 110 falls under the action of gravity and contacts the ejector 361 in the cavity 330. Due to the eccentric support of the ejector 361, the material sheet 110 flips and tilts, changing from a vertical downward movement trajectory to an oblique movement trajectory, so that the material sheet 110 can smoothly slide into the guide groove 340; the material sheet 110 slides out of the stamping die along the guide groove 340 and finally falls into the scrap bin for collection. In this way, the waste material discharge function is achieved, the material pieces 110 are not easy to accumulate, effectively reducing the situation where the material pieces 110 block the stamping holes 320, and ensuring the smooth progress of the stamping process.

[0071] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A lower mold assembly, characterized in that, include: The lower die body has a cavity and a guide groove. The upper end face of the lower die body has a punching hole that communicates with the cavity. The guide groove communicates with the cavity and is inclined from top to bottom along the height direction of the lower die body. The ejector mechanism includes an ejector component disposed within the cavity and directly below the punching hole. The ejector component is configured to protrude from the inner wall of the cavity and provide eccentric support for the material sheet falling from the punching hole, so that the material sheet enters the guide groove in an inclined state.

2. The lower mold assembly according to claim 1, characterized in that, On the projection plane perpendicular to the height direction of the lower die body, the projection of the ejector piece and the projection of the stamping hole are spaced apart at the center. Along the inclined direction of the guide groove, the ejector piece is located on the side of the cavity away from the guide groove.

3. The lower mold assembly according to claim 1, characterized in that, The cavity has a first side and a second side, which are arranged sequentially along the inclined direction of the guide groove. The top material is positioned close to the first side relative to the second side, and the distance between the top material and the first side is less than 1 / 3 of the maximum side length of the material sheet.

4. The lower mold assembly according to claim 1, characterized in that, The punching hole is a triangular hole, and the cross-sectional shape of the cavity matches the shape of the punching hole. One corner of the triangular hole is the first side corner, located on the side of the cavity away from the guide groove, and the other two corners are located on the side of the cavity close to the guide groove. On the projection plane perpendicular to the height direction of the lower die body, the distance between the projection of the top material and the projection of the first side corner is less than or equal to 1 / 3 of the maximum side length of the material sheet.

5. The lower mold assembly according to claim 1, characterized in that, The bottom wall of the guide groove is connected to the bottom wall of the cavity, and the connection between the connection and the top of the top material is the first connection line, the angle between the first connection line and the horizontal direction is greater than or equal to 30° and less than or equal to 45°.

6. The lower mold assembly according to any one of claims 1 to 5, characterized in that, The top material is a rod, one end of which is fixed to the bottom wall of the cavity, and the other end is set toward the punching hole.

7. The lower mold assembly according to claim 6, characterized in that, The ejector mechanism also includes fasteners. The lower mold body has a connecting hole that penetrates the bottom wall of the cavity. One end of the rod passes through the connecting hole and is fixedly connected to the fasteners.

8. The lower mold assembly according to claim 1, characterized in that, The lower mold body includes a lower template, a pad, and a mold base. The lower template, the pad, and the mold base are arranged sequentially from top to bottom. The lower template has the punching hole and a cavity communicating with the punching hole. The cavity is defined by the cavity and the upper end face of the pad. The guide groove is at least partially formed on the surface of the pad.

9. The lower mold assembly according to claim 8, characterized in that, The guide groove includes a first groove and a second groove connected together. The first groove is formed at the edge of the pad, and the second groove is formed at the edge of the mold base.

10. A stamping die, characterized in that, It includes a punch and a lower die assembly as described in any one of claims 1 to 9, wherein the cross-sectional shape of the punch matches the shape of the punching hole.

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