A stable automobile sheet metal die

Abstract

The application discloses a stable automobile sheet metal die, comprising a fixed positioning unit, a frame body assembly, a fixing assembly arranged at the bottom of the frame body assembly, a locking assembly arranged at the bottom of the fixing assembly, and a supporting and lifting assembly arranged at the bottom of the locking assembly. The application has the beneficial effect that the fixed positioning unit is arranged, the frame body assembly drives the movement and adjustment of the upper die and the spacing of the stamping, the force of the stamping is effectively controlled, the fixing assembly preliminarily positions and fixes the lower die, the supporting and lifting assembly is pressed to descend to drive the fixing assembly to further position, calibrate and fix the lower die, the locking assembly is used for double fixing of the lower die, and the lower die is finally positioned and calibrated, the accuracy of the stamping position is maintained, the lower die is moved to the stamping end position, and shock absorption is provided in the stamping process, and the accuracy of the stamping is ensured.

Description

Technical Field

[0001] This invention relates to the field of sheet metal mold technology, and in particular to a stable automotive sheet metal mold. Background Technology

[0002] Sheet metalworking, a processing technology, still lacks a comprehensive definition. According to a definition in a foreign professional journal, it can be defined as: sheet metalworking is a comprehensive cold working process for thin metal sheets (usually below 6mm), including shearing, punching / cutting / combined cutting, bending, riveting, splicing, and forming (such as car bodies). Its significant characteristic is that the thickness of the same part is consistent. Sheet metal is lightweight, high-strength, conductive (suitable for electromagnetic shielding), low-cost, and suitable for large-scale mass production. It is widely used in electronics, communications, automotive, and medical devices. For example, sheet metal is an indispensable component in computer cases, mobile phones, and MP3 players. With the increasingly widespread application of sheet metal, sheet metal part design has become a crucial part of product development. Mechanical engineers must master sheet metal design skills to ensure that the designed sheet metal meets the functional and aesthetic requirements of the product while also simplifying and reducing the cost of stamping die manufacturing.

[0003] In the existing sheet metal mold processing process, the sheet metal mold is placed on the processing platform, but the lower mold cannot be effectively fixed and positioned to ensure that it is aligned with the upper mold during stamping. This makes it impossible to guarantee that the lower mold will not be misaligned during stamping, which could lead to operational errors. Furthermore, the lower mold needs to be adjusted to the appropriate stamping position.

[0004] Traditional drawing die structures use an integral casting process for the upper and lower die pressure rings. The die manufacturing process is lengthy. After the working parts of the drawing die are precision-machined, the die surface needs to be heat-treated to improve the surface hardness. The manufacturing process is complex and expensive. When the die shape changes significantly, the process involves welding the upper and lower dies, machining, and lapping, which is also expensive and time-consuming. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the problems existing in the above or prior art, the present invention is proposed.

[0007] Therefore, the purpose of this invention is to provide a stable automotive sheet metal mold that can adjust the height of the lower mold, fix the lower mold, perform positioning and calibration of the lower mold, and lock the lower mold after adjusting the height to prevent deviations during stamping.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a stable automotive sheet metal mold, which includes a fixed positioning unit, including a frame assembly, a fixing component disposed at the bottom of the frame assembly, a locking component disposed at the bottom of the fixing component, and a support lifting component disposed at the bottom of the locking component.

[0009] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the frame assembly includes a base plate, two sets of limiting posts fixedly connected to the top of the base plate, a fixed crossbar fixedly connected to one side of the two sets of limiting posts at both ends, a limiting groove provided on one side of the limiting posts, two sets of hydraulic cylinders fixedly connected to the bottom of the fixed crossbar, hydraulic rods movably connected to the bottom of the hydraulic cylinders, a limiting plate fixedly connected to the bottom of the two sets of hydraulic rods, two sets of limiting rods fixedly connected to both ends of the limiting plate, and an upper mold provided at the bottom of the limiting plate.

[0010] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the fixing component includes a support plate, four sets of L-shaped fixing blocks disposed on the top of the support plate, a limiting spring fixedly connected to one side of the L-shaped fixing block, a fixing plate fixedly connected to one end of the limiting spring, two sets of positioning plates fixedly connected to the top of the support plate, a fixing spring fixedly connected to one side of the positioning plate, a positioning extrusion plate fixedly connected to one end of the fixing spring, a lower mold disposed on one side of the two sets of positioning extrusion plates, two sets of fixing blocks symmetrically disposed on both sides of the lower mold, and a fixing hole disposed on one side of the fixing block.

[0011] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the locking assembly includes two sets of locking blocks symmetrically arranged on the top of the support plate, a locking hole arranged on the top of the locking block, a T-shaped plug block fixedly connected to the bottom of the locking block, a T-shaped plug groove arranged on the top of the support plate, a vertical extrusion plate fixedly connected to the bottom of the support plate, an inclined extrusion plate fixedly connected to the bottom of the vertical extrusion plate, and a fixing locking member arranged on the bottom of the inclined extrusion plate.

[0012] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the supporting lifting assembly includes a limiting frame fixedly connected to the top of the base plate, a fixed seat fixedly connected to the top of the base plate, a moving groove disposed in the middle of the fixed seat, a fixed column disposed on one side of the fixed seat, an extrusion groove disposed at the bottom of the fixed column, an extrusion moving rod disposed in the extrusion groove, a first extrusion block disposed on one side of the extrusion moving rod, a second extrusion block disposed on one side of the extrusion moving rod, a first extrusion plate disposed on one side of the first extrusion block, a second extrusion plate disposed on one side of the second extrusion block, and a spring fixedly connected to the top of the fixed seat.

[0013] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the fixing and locking component includes a fixing limiting plate, a telescopic hole disposed on the top of the fixing limiting plate, a telescopic locking rod disposed in the telescopic hole, a fixing ring disposed at one end of the telescopic locking rod, a telescopic spring whose two ends are respectively fixedly connected to one side of the fixing ring and one side of the fixing limiting plate, and a fixing connecting rod fixedly connected to the bottom of the fixing limiting plate.

[0014] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the inclined surface of the telescopic locking rod is adapted to the inclined surface of the inclined extrusion plate, the telescopic locking rod is adapted to both the locking hole and the fixing hole, the spring is fixedly connected to the bottom of the support plate, and the top of the first extrusion plate and the top of the second extrusion plate are fixedly connected to the bottom of the support plate.

[0015] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the T-shaped insertion block is adapted to the T-shaped insertion slot, one side of the first extrusion block and the second extrusion plate is set as an inclined surface, the first extrusion plate and the second extrusion plate are set as inclined surfaces, and the inclined surfaces of the first extrusion block and the second extrusion plate are adapted to the inclined surfaces of the first extrusion plate and the second extrusion plate.

[0016] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the upper mold includes an upper mold base, and the lower mold includes a lower mold base and a punch base.

[0017] As a preferred embodiment of the stable automotive sheet metal mold of the present invention, the punch base material is a polymer metal material, the surface hardness of the polymer metal punch base material after hardening is HRC>50, and the thickness of the polymer metal material is 30mm.

[0018] The beneficial effects of this invention are as follows: By setting a fixed positioning unit, the frame assembly drives the movement of the upper mold and adjusts the stamping spacing, effectively controlling the stamping force. The fixing component performs initial positioning and fixing of the lower mold. When the pressing support lifting assembly descends, it drives the fixing component to further position, calibrate and fix the lower mold. The locking component double-fixes the lower mold and performs final positioning and calibration of the lower mold, maintaining the accuracy of the stamping position, moving the lower mold to the stamping end position, and providing shock absorption during the stamping process to ensure stamping accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 A schematic diagram of the overall structure of a stable automotive sheet metal mold.

[0021] Figure 2 Another perspective schematic diagram of the overall structure of a stable automotive sheet metal mold.

[0022] Figure 3 Another perspective schematic diagram of the overall structure of a stable automotive sheet metal mold.

[0023] Figure 4 Another perspective schematic diagram of the overall structure of a stable automotive sheet metal mold.

[0024] Figure 5 For stable automotive sheet metal molds Figure 4 Enlarged diagram of point A in the middle.

[0025] Figure 6 An enlarged schematic diagram of the support and lifting components for a stable automotive sheet metal mold.

[0026] Figure 7 A schematic diagram of the manufacturing process of a three-layer structure drawing die for stable automotive sheet metal molds.

[0027] Figure 8 A schematic diagram illustrating the implementation process for major modifications to the mold profile of a stable automotive sheet metal mold. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1

[0032] Reference Figures 1-8 This is the first embodiment of the present invention. This embodiment provides a stable automotive sheet metal mold, which includes a fixed positioning unit 100. By setting a support lifting component 104, the lower mold is brought into an appropriate stamping height. During the descent, the lower mold is initially calibrated and fixed by the fixing component 102. The lower mold is further fixed and positioned and calibrated by the extrusion locking component 103. The upper mold is driven by the frame component 103 to control the gap of the mold closing.

[0033] Specifically, the fixed positioning unit 100 includes a frame assembly 101, a fixing component 102 disposed at the bottom of the frame assembly 101, a locking component 103 disposed at the bottom of the fixing component 102, and a support lifting component 104 disposed at the bottom of the locking component 103.

[0034] Furthermore, the frame assembly 101 includes a base plate 101a, two sets of limiting posts 101b fixedly connected to the top of the base plate 101a, a fixed crossbar 101c fixedly connected to one side of the two sets of limiting posts 101b at both ends, a limiting groove 101d provided on one side of the limiting posts 101b, two sets of hydraulic cylinders 101e fixedly connected to the bottom of the fixed crossbar 101c, a hydraulic rod 101f movably connected to the bottom of the hydraulic cylinder 101e, a limiting plate 101g fixedly connected to the bottom of the two sets of hydraulic rods 101f, two sets of limiting rods 101h fixedly connected to both ends of the limiting plate 101g, and an upper mold 101i provided at the bottom of the limiting plate 101g.

[0035] Furthermore, the fixing component 102 includes a support plate 102a, four sets of L-shaped fixing blocks 102b disposed on the top of the support plate 102a, a limiting spring 102c fixedly connected to one side of the L-shaped fixing block 102b, a fixing plate 102d fixedly connected to one end of the limiting spring 102c, two sets of positioning plates 102e fixedly connected to the top of the support plate 102a, a fixing spring 102f fixedly connected to one side of the positioning plate 102e, a positioning extrusion plate 102g fixedly connected to one end of the fixing spring 102f, a lower mold 102h disposed on one side of the two sets of positioning extrusion plates 102g, two sets of fixing blocks 102i symmetrically disposed on both sides of the lower mold 102h, and a fixing hole 102j disposed on one side of the fixing block 102i.

[0036] Preferably, the pulled positioning extrusion plate 102g compresses and contracts the fixing spring 102f, placing the lower mold 102h inside. Then, the compression of the positioning extrusion plate 102g is released, and the fixing spring 102f, losing its compressive force, rebounds, causing the positioning extrusion plate 102g to move, fixing the lower mold 102h and pressing it to the middle position between the two sets of positioning extrusion plates 102g.

[0037] Furthermore, the locking assembly 103 includes two sets of locking blocks 103a symmetrically arranged on the top of the support plate 102a, a locking hole 103b arranged on the top of the locking block 103a, a T-shaped plug block 103c fixedly connected to the bottom of the locking block 103a, a T-shaped plug groove 103d arranged on the top of the support plate 102a, a vertical pressing plate 103e fixedly connected to the bottom of the support plate 102a, an inclined pressing plate 103f fixedly connected to the bottom of the vertical pressing plate 103e, and a fixing locking member 103g arranged at the bottom of the inclined pressing plate 103f.

[0038] Furthermore, the supporting lifting assembly 104 includes a limiting frame 104a fixedly connected to the top of the base plate 101a, a fixed seat 104b fixedly connected to the top of the base plate 101a, a moving groove 104c disposed in the middle of the fixed seat 104b, a fixed column 104d disposed on one side of the fixed seat 104b, an extrusion groove 104e disposed at the bottom of the fixed column 104d, an extrusion moving rod 104f disposed in the extrusion groove 104e, a first extrusion block 104g disposed on one side of the extrusion moving rod 104f, a second extrusion block 104h disposed on one side of the extrusion moving rod 104f, a first extrusion plate 104i disposed on one side of the first extrusion block 104g, a second extrusion plate 104j disposed on one side of the second extrusion block 104h, and a spring 104k fixedly connected to the top of the fixed seat 104b.

[0039] Furthermore, the fixing locking component 103g includes a fixing limiting plate 103g-1, a telescopic hole 103g-2 disposed on the top of the fixing limiting plate 103g-1, a telescopic locking rod 103g-3 disposed in the telescopic hole 103g-2, a fixing ring 103g-4 disposed at one end of the telescopic locking rod 103g-3, a telescopic spring 103g-5 whose two ends are fixedly connected to one side of the fixing ring 103g-4 and one side of the fixing limiting plate 103g-1 respectively, and a fixing connecting rod 103g-6 fixedly connected to the bottom of the fixing limiting plate 103g-1.

[0040] Preferably, by pressing the support plate 102a to compress and contract the spring 104k, the support plate 102a is driven to move vertically downward under the limiting action of the limiting frame 104a, which in turn drives the first pressing plate 104i to compress the first pressing block 104g. The inclined surface of the first pressing plate 104i compresses and pushes the first pressing block 104g to the right. Under the compression of the second pressing plate 104j, the second pressing block 104h is compressed and moved along the inclined surface of the second pressing plate 104j, causing the support lifting assembly 104 to descend.

[0041] When the supporting lifting assembly 104 descends, the inclined pressing plate 103f and one end of the telescopic locking rod 103g-3 come into contact, applying a compressive force to one side to the telescopic locking rod 103g-3 until the telescopic locking rod 103g-3 and the vertical pressing plate 103e fully push the telescopic locking rod 103g-3, pulling the telescopic spring 103g-5 away from the fixed limit plate 103g-1. When the telescopic locking rod 103g-3 contacts the locking block 103a, the telescopic spring 103g-5 loses its restrictive force and extends. Under the force of the spring 103g-5's rebound, the T-shaped plug block 103c at the bottom of the locking block 103a slides forward in the T-shaped plug slot 103d. When it moves to the point where the locking hole 103b and the telescopic locking rod 103g-3 are parallel, the telescopic spring 103g-5 completely loses its restrictive force. Under the force of the spring 103g-5's rebound, the telescopic locking rod 103g-3 is driven into the locking hole 103b and the fixing hole 102j, locking and fixing the lower mold 102h and the support plate 102a.

[0042] Furthermore, the inclined surface of the telescopic locking rod 103g-3 is adapted to the inclined surface of the inclined pressing plate 103f, the telescopic locking rod 103g-3 is adapted to both the locking hole 103b and the fixing hole 102j, the spring 104k is fixedly connected to the bottom of the support plate 102a, and the top of the first pressing plate 104i and the top of the second pressing plate 104j are fixedly connected to the bottom of the support plate 102a.

[0043] Furthermore, the T-shaped plug block 103c is adapted to the T-shaped plug slot 103d, and one side of the first extrusion block 104g and the second extrusion plate 104j is set as an inclined surface. The first extrusion plate 104i and the second extrusion plate 104j are set as inclined surfaces, and the inclined surfaces of the first extrusion block 104g and the second extrusion plate 104j are adapted to the inclined surfaces of the first extrusion plate 104i and the second extrusion plate 104j.

[0044] Furthermore, the spring 104k is fixedly connected to the bottom of the support plate 102a, and the top of the first extrusion plate 104i and the top of the second extrusion plate 104j are fixedly connected to the bottom of the support plate 102a.

[0045] Furthermore, the upper mold 101i includes an upper mold base, and the lower mold 102h includes a lower mold base and a punch base.

[0046] Furthermore, the punch substrate material is made of polymer metal material. After surface hardening, the hardness of the polymer metal punch substrate is HRC>50, and the thickness of the polymer metal material is 30mm.

[0047] It should be noted that when the support plate 102a moves downward, the telescopic locking rod 103g-3 pushes the T-shaped insertion block 103c at the bottom of the locking block 103a to slide forward in the T-shaped insertion groove 103d, causing the L-shaped fixing blocks 102b on both sides to move forward together. The arc-shaped surface on one side of the fixing plate 102d and the arc-shaped surface on one side of the lower mold 102h come into contact and press, applying tension to the limit spring 102c, causing the limit spring 102c to compress and pull the fixing plate 102d to move. When the fixing plate 102d moves to the point where it loses pressure with the side of the lower mold 102h, the rebound tension of the limit spring 102c causes the fixing plate 102d to be tightly attached to the side of the lower mold 102h, performing double fixing and positioning calibration of the lower mold 102h. The locking block 103a will push and press the lower mold 102h, further calibrating the positioning of the lower mold 102h and ensuring the accuracy of positioning.

[0048] In use, this invention has a total of 10 steps. In the first step, the lower mold 102h is placed, and the pulling positioning extrusion plate 102g compresses and contracts the fixing spring 102f to place the lower mold 102h in. Then, the compression of the positioning extrusion plate 102g is released, and the fixing spring 102f loses the extrusion force and rebounds, causing the positioning extrusion plate 102g to move, thereby fixing and compressing the lower mold 102h to the middle position of the two sets of positioning extrusion plates 102g.

[0049] The second step involves adjusting the height of the lower mold 102h. By pressing the support plate 102a, the spring 104k is compressed and contracted, causing the support plate 102a to move vertically downward under the limiting action of the limiting frame 104a. This causes the first extrusion plate 104i to extrude the first extrusion block 104g, and the inclined surface of the first extrusion plate 104i pushes the first extrusion block 104g to move to the right. Under the extrusion of the second extrusion plate 104j, the second extrusion block 104h moves along the inclined surface of the second extrusion plate 104j, causing the support lifting assembly 104 to descend.

[0050] In the third usage process, the lower mold 102h is further calibrated, positioned, and fixed. When the support plate 102a moves downward, the telescopic locking rod 103g-3 pushes the T-shaped insertion block 103c at the bottom of the locking block 103a to slide forward in the T-shaped insertion groove 103d, causing the L-shaped fixing blocks 102b on both sides to move forward together. The arc-shaped surface on one side of the fixing plate 102d and the arc-shaped surface on one side of the lower mold 102h come into contact and press, applying tension to the limit spring 102c. The limiting spring 102c is compressed and contracted, pulling the fixing plate 102d to move. When the fixing plate 102d moves to the point where it loses compression with the side of the lower mold 102h, the rebound force of the limiting spring 102c causes the fixing plate 102d to tightly adhere to the side of the lower mold 102h, thus performing double fixing and positioning calibration of the lower mold 102h. The locking block 103a will push and squeeze the lower mold 102h, further calibrating the positioning of the lower mold 102h and ensuring the accuracy of positioning.

[0051] In the fourth usage process, the lower mold 102h is locked. When the supporting lifting assembly 104 descends, the inclined extrusion plate 103f and one end of the telescopic locking rod 103g-3 come into contact, applying a compressive force to one side to the telescopic locking rod 103g-3 until the telescopic locking rod 103g-3 and the vertical extrusion plate 103e completely push the telescopic locking rod 103g-3, pulling the telescopic spring 103g-5 away from the fixed limit plate 103g-1. When the telescopic locking rod 103g-3 contacts the locking block 103a, the telescopic spring 103g... -5 loses its restraining force. Under the action of the rebound force of the telescopic spring 103g-5, it pushes the T-shaped plug block 103c at the bottom of the locking block 103a to slide forward in the T-shaped plug slot 103d. When it moves to the point where the locking hole 103b and the telescopic locking rod 103g-3 are parallel, the telescopic spring 103g-5 completely loses its restraining force. Under the action of the rebound force of the telescopic spring 103g-5, it drives the telescopic locking rod 103g-3 into the locking hole 103b and the fixing hole 102j, thereby locking and fixing the lower mold 102h and the support plate 102a.

[0052] In the fifth process, the upper mold 101i is adjusted and stamped. The two sets of hydraulic cylinders 101e are activated to drive the hydraulic rods 101f to retract and pull the limiting plate 101g. The two sets of limiting rods 101h slide and rise within the limiting groove 101d, ensuring the movement of the frame assembly 101 is limited and improving the stamping accuracy. The upper mold 101i is moved to a suitable stamping height and pushed downward to complete the mold closing process under the limitation of the two sets of limiting rods 101h within the limiting groove 101d, thus ensuring the stamping accuracy.

[0053] In summary, this invention effectively controls the stamping force by setting a fixed positioning unit, with the frame assembly driving the movement of the upper mold and adjusting the stamping spacing. The fixing component performs initial positioning and fixing of the lower mold, and when the pressing support lifting component descends, it drives the fixing component to further position, calibrate, and fix the lower mold. The locking component provides double fixing of the lower mold and performs final positioning and calibration of the lower mold, maintaining the accuracy of the stamping position, moving the lower mold to the stamping end position, and providing shock absorption during the stamping process to ensure stamping accuracy.

[0054] The upper mold 101i includes an upper mold frame, and the lower mold 102h includes a lower mold frame and a punch base. The punch base is made of polymer metal material. After surface hardening, the hardness of the polymer metal punch base is HRC>50, and the thickness of the polymer metal material is 30mm.

[0055] Specifically, the upper mold 101i and the lower mold 102h are manufactured using the following method:

[0056] S1. Design a three-layer structure drawing die, which is a combination of an upper die set, a lower die set, and a punch base.

[0057] S2. The design includes the fabrication and processing of the upper and lower mold frames, and the fabrication of the base layer of the concave and convex model surface.

[0058] S3. Assemble the base layer and the uneven model surface, and put the whole thing into the oven at high temperature to undergo a chemical reaction. The molding and baking time is 1.5 days.

[0059] S4. Connect and lock the upper and lower mold frames to the base layer of the concave and convex model surface respectively, and perform 3D precision surface machining on the base layer of the concave and convex model surface according to the machining data.

[0060] S5. After the base layer of the concave and convex model is completed, the upper and lower molds are joined together and the upper press is used to grind them together to produce parts.

[0061] Specifically, the upper mold 101i and lower mold 102h described above make large-area changes to the product data surface using the following method;

[0062] A1. Unlock the connection between the upper and lower mold frames and the base layer of the concave and convex model surface.

[0063] A2. Add baffles around the surface of the polymer metal matrix layer concave-convex model;

[0064] A3. Introduce polymer metal liquid into the baffle and place the entire concave and convex mold base layer into the baking oven for baking. The polymer metal base layer will naturally form and be baked for 1.5 days.

[0065] A4. Connect and lock the upper and lower mold frames to the base layer of the die and the mold base respectively, and perform 3D precision machining of the upper and lower mold surfaces according to the latest product data;

[0066] A5. After the upper and lower mold frames are precision machined, the surfaces are polished. The upper and lower molds are then joined together and pressed together using an upper press to produce parts.

[0067] The new three-layer mold structure eliminates the need for casting, saving 30 days of casting waiting time compared to previous projects. This reduces the first-time production time for automotive sheet metal parts from 65 days to 20 days. Because the manufacturing process for the drawing die has been changed from traditional casting to a metal matrix + mold base, the mold development cycle is shortened by eliminating the need for casting. Since the surface hardness of the metal matrix mold can reach HRC>50, the mold surface does not require further heat treatment, saving time. Furthermore, due to the special properties of the metal matrix material, the mold surface can achieve a mirror finish after processing, reducing the time spent on tooling and polishing, thus shortening the mold development cycle and improving efficiency. The innovative heat treatment process for the working parts of the mold surface, with its three-layer structure, allows the working parts of the mold's concave and convex surfaces to achieve the required surface hardness without heat treatment using the metal matrix material. This eliminates the cost of scrapping due to casting defects, reducing the overall mold development cost. The upper and lower mold bases can be reused multiple times, and the new process significantly reduces the development cost of drawing dies. Large-scale changes to the mold profile are easier to achieve. When the mold profile is significantly altered, the upper and lower mold bases do not need to be changed. Only the base material of the punch and concave mold base layers needs to be recast and processed according to the new data to achieve the change, greatly reducing the mold scrap caused by previous design changes. It boasts strong compatibility and a wide range of applications. The three-layer structure metal base drawing die is suitable for all automotive sheet metal mold development, reducing environmental pollution. The new three-layer structure eliminates the mold casting process, further reducing environmental pollution.

[0068] In summary, innovations in mold manufacturing processes and methods have been made based on the structural characteristics of drawing dies, changing the traditional mold casting method. This new structure divides the mold into three layers: upper and lower mold frames, and a collective layer of concave and convex dies. The mold frames do not require casting; the collective layer of concave and convex dies is naturally formed through a chemical reaction in an oven using metal materials. This results in zero mold pollution and a short manufacturing cycle. The mold surface has been replaced with a high-polymer metal material instead of the original GM246. The surface hardening treatment method has also been changed. Due to the special characteristics of the three-layer structure and the metal substrate, the surface hardness of the mold, previously achieved through flame or laser heat treatment, is now achieved in a way that allows the mold to reach the hardness of a heat-treated casting mold after forming. The original casting model surface machining process involved 2D roughing + semi-finishing + 3D surface finishing + mold surface heat treatment + lamination. The innovative process uses 3D surface finishing + lamination, enabling large-area changes to the mold surface that were previously impossible. This mold surface modification does not require large-area welding; only the filling and machining of the concave and convex die base layer is needed to achieve large-scale changes, resulting in a short modification cycle and low cost.

[0069] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0070] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0071] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A stable automotive sheet metal mold, characterized in that: include, The fixed positioning unit (100) includes a frame assembly (101), a fixing component (102) disposed at the bottom of the frame assembly (101), a locking component (103) disposed at the bottom of the fixing component (102), and a support lifting component (104) disposed at the bottom of the locking component (103). The locking assembly (103) includes two sets of locking blocks (103a) symmetrically arranged on the top of the support plate (102a), a locking hole (103b) arranged on the top of the locking block (103a), a T-shaped plug block (103c) fixedly connected to the bottom of the locking block (103a), a T-shaped plug groove (103d) arranged on the top of the support plate (102a), a vertical pressing plate (103e) fixedly connected to the bottom of the support plate (102a), an inclined pressing plate (103f) fixedly connected to the bottom of the vertical pressing plate (103e), and a fixing locking member (103g) arranged at the bottom of the inclined pressing plate (103f). The fixing locking component (103g) includes a fixing limiting plate (103g-1), a telescopic hole (103g-2) disposed on the top of the fixing limiting plate (103g-1), a telescopic locking rod (103g-3) disposed in the telescopic hole (103g-2), a fixing ring (103g-4) disposed at one end of the telescopic locking rod (103g-3), a telescopic spring (103g-5) whose two ends are fixedly connected to one side of the fixing ring (103g-4) and one side of the fixing limiting plate (103g-1) respectively, and a fixing connecting rod (103g-6) fixedly connected to the bottom of the fixing limiting plate (103g-1).

2. The stable automotive sheet metal mold as described in claim 1, characterized in that: The frame assembly (101) includes a base plate (101a), two sets of limiting posts (101b) fixedly connected to the top of the base plate (101a), a fixed crossbar (101c) fixedly connected to one side of the two sets of limiting posts (101b) at both ends, a limiting groove (101d) provided on one side of the limiting post (101b), two sets of hydraulic cylinders (101e) fixedly connected to the bottom of the fixed crossbar (101c), a hydraulic rod (101f) movably connected to the bottom of the hydraulic cylinder (101e), a limiting plate (101g) fixedly connected to the bottom of the two sets of hydraulic rods (101f), two sets of limiting rods (101h) fixedly connected to both ends of the limiting plate (101g), and an upper mold (101i) provided at the bottom of the limiting plate (101g).

3. The stable automotive sheet metal mold as described in claim 2, characterized in that: The fixing component (102) includes a support plate (102a), four sets of L-shaped fixing blocks (102b) disposed on the top of the support plate (102a), a limiting spring (102c) fixedly connected to one side of the L-shaped fixing block (102b), a fixing plate (102d) fixedly connected to one end of the limiting spring (102c), two sets of positioning plates (102e) fixedly connected to the top of the support plate (102a), a fixing spring (102f) fixedly connected to one side of the positioning plate (102e), a positioning extrusion plate (102g) fixedly connected to one end of the fixing spring (102f), a lower mold (102h) disposed on one side of the two sets of positioning extrusion plates (102g), two sets of fixing blocks (102i) symmetrically disposed on both sides of the lower mold (102h), and a fixing hole (102j) disposed on one side of the fixing block (102i).

4. The stable automotive sheet metal mold as described in claim 3, characterized in that: The supporting lifting assembly (104) includes a limiting frame (104a) fixedly connected to the top of the base plate (101a), a fixed seat (104b) fixedly connected to the top of the base plate (101a), a moving groove (104c) disposed in the middle of the fixed seat (104b), a fixed column (104d) disposed on one side of the fixed seat (104b), an extrusion groove (104e) disposed at the bottom of the fixed column (104d), an extrusion moving rod (104f) disposed in the extrusion groove (104e), a first extrusion block (104g) disposed on one side of the extrusion moving rod (104f), a second extrusion block (104h) disposed on one side of the extrusion moving rod (104f), a first extrusion plate (104i) disposed on one side of the first extrusion block (104g), a second extrusion plate (104j) disposed on one side of the second extrusion block (104h), and a spring (104k) fixedly connected to the top of the fixed seat (104b).

5. The stable automotive sheet metal mold as described in claim 4, characterized in that: The T-shaped plug-in block (103c) is adapted to the T-shaped plug-in slot (103d). One side of the first extrusion block (104g) and the second extrusion plate (104j) is set as an inclined surface. The first extrusion plate (104i) and the second extrusion plate (104j) are set as inclined surfaces. The inclined surfaces of the first extrusion block (104g) and the second extrusion plate (104j) are adapted to the inclined surfaces of the first extrusion plate (104i) and the second extrusion plate (104j).

6. The stable automotive sheet metal mold as described in claim 5, characterized in that: The inclined surface of the telescopic locking rod (103g-3) is adapted to the inclined surface of the inclined pressing plate (103f). The telescopic locking rod (103g-3) is adapted to both the locking hole (103b) and the fixing hole (102j). The spring (104k) is fixedly connected to the bottom of the support plate (102a). The top of the first pressing plate (104i) and the top of the second pressing plate (104j) are fixedly connected to the bottom of the support plate (102a).

7. The stable automotive sheet metal mold as described in claim 6, characterized in that: The upper mold (101i) includes an upper mold frame, and the lower mold (102h) includes a lower mold frame and a punch base.

8. The stable automotive sheet metal mold as described in claim 7, characterized in that: The punch substrate material is a polymer metal material, and the surface hardness of the polymer metal punch substrate after hardening is HRC>50. The thickness of the polymer metal material is 30mm.

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