drawing die
By introducing a piercing blade and a guiding system into the drawing die, the problem of inaccurate positioning of the sheet metal on the laser cutting equipment was solved, achieving precise positioning and consistent cutting of the sheet metal, improving product yield and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN SINGTON TECHNOLOGIES CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-10
AI Technical Summary
Existing automotive parts cannot be effectively positioned on laser cutting equipment after being drawn, resulting in inconsistent cutting dimensions, scrapped sheets, and reduced product yield.
Design a drawing die comprising an upper die and a lower die. The lower die is equipped with a rectangular punch and a piercing blade. The piercing blade consists of a piercing blade and a stamping column, which are used to form an initial hole during sheet metal stretching and to form a circular positioning hole through stamping. The guide column and guide hole are combined to ensure accurate positioning.
It achieves precise positioning of sheet metal on laser cutting equipment, improves cutting consistency, reduces cutting size deviation and sheet metal scrap rate caused by inaccurate positioning, improves product yield and reduces production costs.
Smart Images
Figure CN224475505U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, and in particular to a drawing die. Background Technology
[0002] Currently, sheet metal for automotive parts is heated to high temperatures and then stretched into shape using drawing dies. It then needs to be transferred to subsequent laser cutting equipment for further processing. However, in the existing process, the sheet metal cannot be effectively positioned on the laser cutting equipment, causing it to shift during cutting. This results in inconsistent cutting dimensions, leading to a large amount of scrap and reduced product yield. Utility Model Content
[0003] The main purpose of this utility model is to propose a drawing die, which aims to solve the technical problem that in the prior art, after the sheet metal is stretched by the drawing die, it cannot be effectively positioned in the subsequent laser cutting process.
[0004] To achieve the above objectives, this utility model proposes a drawing die, comprising:
[0005] Upper mold, wherein the upper mold is provided with a concave mold;
[0006] The lower die has a punch on one side facing the die cavity. Both the die cavity and the punch are rectangular. The punch has piercing blades at its four corners. Each piercing blade includes a piercing blade for piercing the sheet metal and a stamping column. One end of the stamping column is connected to the punch, and the other end of the stamping column is connected to the piercing blade.
[0007] In some embodiments, the four corners of the die are respectively provided with receiving holes adapted to the piercing knife.
[0008] In some embodiments, guide posts are provided at the four corners of the punch, and guide holes are provided at the four corners of the die.
[0009] In some embodiments, the piercing blade has a pyramidal structure.
[0010] In some embodiments, the upper mold further includes an upper template disposed on the side of the die opposite to the punch, and a plurality of spaced upper mold feet are connected between the upper template and the die.
[0011] In some embodiments, the lower die further includes a lower template disposed on the side of the punch facing away from the die, and the lower template is connected between the punches by a plurality of spaced lower die feet.
[0012] In some embodiments, two lifting lug structures are respectively provided on opposite sides of the upper template and the lower template.
[0013] The lower die of this invention is provided with a punch for placing sheet metal. The punch has a rectangular structure, and each of the four corners of the punch is provided with a piercing blade for piercing the sheet metal. The piercing blade includes a piercing edge and a stamping column. The piercing edge can pierce the surface of the sheet metal to form an initial hole when the die and punch stretch the sheet metal. The stamping column further stamps the initial hole to form a circular positioning hole, which is beneficial for the sheet metal to achieve accurate positioning in subsequent laser cutting equipment. It provides a reliable positioning reference for laser cutting, greatly reduces the cutting size deviation caused by inaccurate positioning, thereby improving product yield and reducing the production cost due to sheet metal scrap. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the drawing die of this utility model;
[0015] Figure 2 for Figure 1 Enlarged diagram of section A in the middle;
[0016] Figure 3 This is a structural schematic diagram of an embodiment of the lower mold of this utility model;
[0017] Figure 4 This is a structural schematic diagram of an embodiment of the upper mold of this utility model.
[0018] Explanation of icon numbers:
[0019] label name label name 100 Drawing dies 110 Upper mold 120 lower mold 111 Die 121 punch 1211 Piercing knife 1213 Piercing Blade 1214 stamped column 1111 Receiving hole 1215 Guide column 1112 Guide hole 112 template 113 upper mold foot 122 Download template 123 lower mold foot 130 Lifting lug structure Detailed Implementation
[0020] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0022] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present.
[0023] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0024] Please refer to Figure 1 , Figure 2 as well as Figure 4 This utility model provides a drawing die 100, comprising:
[0025] Upper mold 110, the upper mold 110 is provided with a cavity mold 111;
[0026] The lower die 120 has a punch 121 on the side of the lower die 120 facing the die 111. Both the die 111 and the punch 121 are rectangular. The four corners of the punch 121 are respectively provided with piercing blades 1211. The piercing blades 1211 include piercing blades 1213 for piercing the sheet metal and stamping pillars 1214. One end of the stamping pillar 1214 is connected to the punch 121, and the other end of the stamping pillar 1214 is connected to the piercing blade 1213.
[0027] The drawing die 100 mainly consists of two parts: an upper die 110 and a lower die 120, forming a die-fitting structure. The upper die 110 is equipped with a concave die 111, which is positioned opposite to the lower die 120 with a convex die 121. Both of them adopt a rectangular structure design, which provides a stable working space for the drawing and forming of the sheet metal, ensuring that the sheet metal is subjected to uniform stress during the forming process and reducing deformation deviations caused by irregular die shapes.
[0028] In this embodiment, aluminum alloy sheet is used as an example. The aluminum alloy sheet is heated to about 400-500°C, and then stretched and deformed by drawing die 100. It needs to be transferred to subsequent laser cutting equipment for further processing. However, in the existing process, the sheet cannot be effectively positioned on the laser cutting equipment, which causes the sheet to shift during cutting, resulting in inconsistent cutting dimensions and reduced product yield.
[0029] Therefore, the present invention provides a piercing knife 1211 at each of the four corners of the punch 121. The piercing knife 1211 can pierce the surface of the sheet material to form a hole when the sheet material is stretched by the drawing die 100, which facilitates subsequent positioning.
[0030] As a preferred embodiment of this utility model, please continue to refer to... Figure 2The piercing blade 1211 is composed of a piercing blade 1213 and a stamping column 1214. The piercing blade 1213 is responsible for piercing the surface of the sheet metal. The stamping column 1214 can cooperate with the die 111 to stamp the initial hole formed by the piercing to form a relatively regular circular positioning hole, which is conducive to the accurate positioning of the sheet metal in subsequent laser cutting equipment, improves the cutting consistency, and thus improves the product yield.
[0031] The lower die 120 of this utility model is provided with a punch 121 for placing sheet metal. The punch 121 has a rectangular structure, and each of the four corners of the punch 121 is provided with a piercing blade 1211 for piercing the sheet metal. The piercing blade 1211 includes a piercing edge 1213 and a stamping column 1214. The piercing edge 1213 can pierce the surface of the sheet metal to form an initial hole when the die 111 and the punch 121 stretch the sheet metal. The stamping column 1214 further stamps the initial hole to form a circular positioning hole, which is beneficial for the sheet metal to achieve accurate positioning in subsequent laser cutting equipment, providing a reliable positioning reference for laser cutting, greatly reducing the cutting size deviation caused by inaccurate positioning, thereby improving product yield, and reducing the production cost due to sheet metal scrap.
[0032] Please refer to Figure 4 The four corners of the die 111 are respectively provided with receiving holes 1111 that are adapted to the piercing knife 1211.
[0033] The main function of the receiving hole 1111 is to work with the piercing knife 1211 to pierce the sheet metal. Its shape can be circular, and its diameter is slightly larger than that of the stamping column 1214. The receiving hole 1111 not only provides a movement guide space for the piercing knife 1211, but also restricts the lateral displacement of the piercing knife 1211 during the sheet metal stretching process, ensuring the perpendicularity and stability of the piercing knife 1211 when piercing the sheet metal.
[0034] When the drawing die 100 starts working, the upper die 110 moves downward, and the die 111 gradually approaches the punch 121 and the sheet metal. In the initial stage of die closing, the piercing blade 1211 rises with the punch 121, and the receiving hole 1111 provides an upward channel for it. As the sheet metal is gradually compressed, when the piercing blade 1213 contacts the surface of the sheet metal and begins to pierce, the receiving hole 1111 and the piercing blade 1211 form a cooperating constraint to prevent the piercing blade 1211 from tilting due to lateral force. In the stage where the stamping column 1214 forms the initial hole, the receiving hole 1111 continues to play a guiding and limiting role, ensuring that the stamping column 1214 accurately extrudes the hole in the vertical direction, so that the sheet metal, under the dual action of the die 111 and the stamping column 1214, finally forms a circular positioning hole with precise dimensions and smooth hole walls.
[0035] Please refer to Figure 3 and Figure 4 The four corners of the punch 121 are also provided with guide posts 1215, and the four corners of the die 111 are respectively provided with guide holes 1112.
[0036] The guide posts 1215 added at the four corners of the punch 121 and the guide holes 1112 corresponding to the four corners of the die 111 constitute the guiding and positioning system of the drawing die 100. The guide posts 1215 are cylindrical and vertically fixed at the four corners of the punch 121. The guide holes 1112 on the die 111 are precisely matched with the guide posts 1215, with the hole diameter slightly larger than the diameter of the guide posts 1215, forming a small fitting clearance. This ensures that the guide posts 1215 can be smoothly inserted into the guide holes 1112, while also providing necessary guiding constraints. The arrangement of the guide posts 1215 and the guide holes 1112, together with the piercing knife 1211 and the receiving hole 1111, ensures the relative positional accuracy of the upper die 110 and the lower die 120 as a whole, while the latter focuses on the local accuracy of the positioning hole forming, which is beneficial to improving the sheet metal stretching accuracy.
[0037] Please refer to Figure 2 The piercing blade 1213 has a pyramidal structure.
[0038] In other words, the piercing blade 1213 comprises three inclined sub-piercing blades, which intersect to form a sharp piercing apex. When piercing the sheet metal, the sharp apex concentrates stress upon contact, allowing for rapid piercing of the sheet surface under relatively low pressure. As the pressure increases, the three sub-piercing blades, with their inclined guiding action, guide the sheet metal to separate evenly in all directions, reducing resistance and tearing during the piercing process. Simultaneously, guided by the guide post 1215 and guide hole 1112, the sheet metal is constantly compressed, and the stamping post 1214 subsequently stamps the initial pierced hole. The pyramidal structure of the piercing blade 1213 creates a relatively regular edge to the initial hole during piercing, providing a good foundation for the subsequent stamping post 1214 to stamp it into a circular positioning hole, ensuring efficient and precise positioning hole forming.
[0039] The piercing blade 1213 of this invention is designed with a pyramidal structure. Its sharp piercing apex and stress concentration characteristics significantly reduce the pressure required to pierce the sheet metal, shorten the piercing time, and improve the working efficiency of the drawing die 100, making the entire drawing and positioning hole processing flow smoother and more efficient. When piercing the sheet metal, the pyramidal structure, with the guiding effect of the sub-piercing blade, can effectively reduce tearing and deformation of the sheet metal, resulting in a neat edge of the initial hole. This facilitates the stamping of high-precision circular positioning holes by the stamping column 1214, further reducing the product scrap rate caused by positioning hole problems.
[0040] Please refer to Figure 4The upper die 110 also includes an upper template 112 disposed on the side of the die 111 opposite to the punch 121. Multiple spaced upper die feet 113 connect the upper template 112 and the die 111. These spaced upper die feet 113 form a stable support structure, which can evenly distribute the pressure applied by the driving device, preventing deformation of the upper template 112 and the die 111 due to excessive local stress, thereby improving the stability and service life of the drawing die 100.
[0041] Please refer to Figure 4 The lower die 120 also includes a lower template 122 disposed on the side of the punch 121 opposite to the die 111. The lower template 122 is connected to the punch 121 by a plurality of spaced lower die feet 123. The plurality of spaced lower die feet 123 form a stable support structure, which can evenly distribute the pressure applied by the upper die 110 to the lower die 120, prevent the punch 121 from deforming due to excessive local stress, and improve the stability and service life of the drawing die 100.
[0042] Please refer to Figure 3 and Figure 4 Two lifting lug structures 130 are respectively provided on the opposite sides of the upper template 112 and the lower template 122.
[0043] In other words, both the upper template 112 and the lower template 122 are provided with four lifting lug structures 130, arranged in pairs opposite each other. The connection between the lifting lug structure 130 and the upper template 112 and / or the lower template 122 can be welding or bolting, as long as a stable connection between the lifting lug structure 130 and the drawing die 100 can be achieved. This utility model does not impose any restrictions on this.
[0044] The symmetrically distributed lifting lugs 130 ensure that the drawing die 100 is subjected to uniform force during hoisting, which greatly reduces the probability of safety accidents such as falling or collision caused by the center of gravity shift or uneven force on the drawing die 100. This effectively protects the safety of the drawing die 100 and the operators, and reduces the risk of equipment damage and personal injury caused by safety accidents.
[0045] Furthermore, the lifting lug structure 130 makes the maintenance and management of the drawing die 100 more convenient. When the drawing die 100 needs repair, maintenance, or replacement, it can be quickly lifted off the machine and placed in a designated maintenance area via the lifting lug structure 130, facilitating operation by technicians. Moreover, the lifting lug structure 130 can also be used for hoisting and placement during storage, allowing for efficient storage space planning and improved warehouse space utilization.
[0046] The above are only some or preferred embodiments of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the contents of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.
Claims
1. A drawing die, used in the manufacture of automotive parts, characterized in that, include: Upper mold, wherein the upper mold is provided with a concave mold; The lower die has a punch on one side facing the die cavity. Both the die cavity and the punch are rectangular. The punch has piercing blades at its four corners. Each piercing blade includes a piercing blade for piercing the sheet metal and a stamping column. One end of the stamping column is connected to the punch, and the other end of the stamping column is connected to the piercing blade.
2. The drawing die according to claim 1, characterized in that, The four corners of the die are respectively provided with receiving holes that are adapted to the piercing knife.
3. The drawing die according to claim 1, characterized in that, The punch is provided with guide posts at its four corners, and the die is provided with guide holes at its four corners.
4. The drawing die according to claim 1, characterized in that, The piercing blade has a pyramidal structure.
5. The drawing die according to claim 1, characterized in that, The upper mold also includes an upper template disposed on the side of the concave mold opposite to the convex mold, and a plurality of spaced upper mold feet are connected between the upper template and the concave mold.
6. The drawing die according to claim 5, characterized in that, The lower die also includes a lower template disposed on the side of the punch facing away from the die, and the lower template is connected to the punch with a plurality of spaced lower die feet.
7. The drawing die according to claim 6, characterized in that, Two lifting lugs are provided on each of the opposite sides of the upper template and the lower template.