A double-action automatic clamping die for large, deep-cavity, basin-shaped parts and its clamping method

Abstract

This invention provides an automatic clamping method for a large, deep-cavity, basin-shaped part using a dual-action deep drawing die. The maximum contours of the lower die assembly, the blank holder assembly, and the upper die assembly of the deep drawing die are significantly larger than the effective clamping range of the corresponding connecting components of the deep drawing equipment, namely the worktable, the outer slider, and the inner slider. By designing a variable cross-section combination structure for the lower die assembly, the blank holder assembly, and the upper die assembly, and utilizing a die transfer component whose length and width are not larger than those of the connecting components of the equipment, the problem of motion and connection interference between the ultra-large deep drawing die and the clamping system of the automatic clamping equipment is solved. By designing triangular, ring-shaped, cross-shaped, and staggered reinforcing ribs on the components of the shell structure die, the structural rigidity of the shell structure die components is strengthened and the structure is made lighter. By designing non-uniform external and internal guide mechanisms between the die components, combined with positioning pin holes and U-shaped die grooves on the die connecting components that match the equipment, the lifting of ultra-heavy die components can be automatically adjusted by gravity. The technology of this application can significantly improve the processing width limit of dual-action deep drawing equipment and can be widely applied to the automatic clamping of ultra-long, wide, large, deep-cavity, thin-shell part dies.

Description

Technical Field

[0001] This invention relates to a sheet metal manufacturing technology in the field of aircraft manufacturing, specifically a double-action deep drawing die for automatic clamping of large deep cavity basin-shaped parts and its clamping method. Background Technology

[0002] As new aircraft development demands increasingly higher standards for service life and aerodynamic characteristics, the integral forming of large sheet metal parts will significantly reduce deformation caused by welding or riveting. This not only allows for lighter structures but also significantly improves assembly coordination accuracy and efficiency. Therefore, integral forming of ultra-large thin-walled parts is receiving increasing attention in aircraft applications.

[0003] As is well known, double-action deep drawing relies on an external slider to provide blank holder force. Compared with single-action deep drawing, it has significant advantages such as a larger blank holder bearing area, less die deformation, and uniform load distribution, making it particularly suitable for large, complex, and deep-cavity integral deep drawing. However, traditional double-action deep drawing dies also have significant drawbacks. The upper die holder is significantly smaller than the blank holder ring, resulting in a deep and narrow space between the blank holder ring and the upper die holder when the die is closed; this also creates operational interference and blind spots. To address the difficulty of die installation due to the built-in punch, advanced double-action deep drawing equipment both domestically and internationally is equipped with an automatic clamping system, utilizing the equipment's built-in transmission clamping mechanism. However, the clamping mechanism must be fixed to the equipment, and its adjustable range is limited. This is especially true for ultra-large dies where the die components exceed the corresponding equipment components, making die installation even more difficult.

[0004] The existing mainstream double-action deep drawing equipment has an effective worktable and outer slider size of 1.96 meters x 3.3 meters, with a theoretical maximum processing capacity of 3.1 meters for blank width. However, most equipment has clamping mechanisms set along the width direction of the worktable and outer slider, so the actual maximum blank width that can be formed is only about 1.8 meters. For large deep-cavity basin-shaped parts with blank diameters greater than 2.0 meters, the following problems still exist: First, the die pressure ring and lower die are much larger than the width of the outer slider and worktable of the equipment, and traditional dies cannot be fastened to the equipment; second, the distance between the upper die holder clamping part and the outer contour edge of the pressure ring is larger, resulting in more serious operational interference and blind spots; third, the dies are large and bulky, with a single component weighing more than 20 tons, making movement and positioning on the worktable extremely difficult. Summary of the Invention

[0005] This invention provides a double-action deep drawing die for automatic clamping of large deep-cavity basin-shaped parts and its clamping method. It solves the problem of automatic clamping of dies exceeding the equipment table by adopting a conversion connection method; it solves the problem of difficult movement of overweight parts by designing a positioning reference die component that matches the equipment and automatically adjusts the lifting posture by gravity; and it achieves automatic matching of the relative positions between overweight die components by designing error-proof built-in and external guides.

[0006] The first aspect of the present invention provides an automatic clamping double-action deep drawing die for large deep cavity basin-shaped parts, comprising: a lower die assembly 4, a pressing edge assembly 5, and an upper die assembly 6;

[0007] The lower die assembly 4 is fixed on the worktable of the deep drawing equipment; the lower die assembly 4 includes: a lower die base 7 and a lower die adapter plate 8;

[0008] The pressing component 5 includes: pressing base 11 and pressing adapter plate 12; the upper surface of the pressing component 5 is fixedly connected to the outer slider of the deep drawing equipment, and a large through hole 13 is provided in the center of the pressing component 5, and a limit guide groove 21 is provided on the inner wall of the large through hole 13.

[0009] The upper die assembly 6 includes an upper die base 14 and an upper die seat 15. The upper end of the upper die seat 15 is provided with a wider upper die adapter plate 16. The upper surface of the upper die adapter plate 16 is fixedly connected to the inner slider of the deep drawing equipment. The lower surface of the upper die seat 15 is fixedly connected to the upper die base 14. The size of the working surface 17 of the upper die base 14 matches the inner surface size of the large deep cavity basin-shaped part 1 and is larger than the inner hole contour size of the outer slider of the deep drawing equipment. A guide boss 22 matching the limiting guide groove 21 of the pressing component 5 is provided above the upper die base 14. The limiting guide groove 21 is used to limit the downward movement distance of the upper die assembly 6 relative to the pressing component 5.

[0010] The lower die adapter plate 8 of the lower die assembly 4, the pressing edge adapter plate 12 of the pressing edge assembly 5, and the upper die adapter plate 16 of the upper die assembly 6 are respectively provided with a plurality of U-shaped die mounting grooves 26 that match the deep drawing equipment worktable, outer slider, and inner slider mounting groove. The opening direction of the U-shaped die mounting groove 26 is perpendicular to the length direction of the deep drawing equipment worktable, and the width of the U-shaped die mounting groove 26 is greater than the width of the deep drawing equipment mounting groove.

[0011] Optionally, the number of limiting guide grooves 21 of the pressing component 5 is multiple, and they are non-uniformly arranged along the inner wall of the large through hole 13 of the pressing component 5.

[0012] Optionally, the width of the upper surface of the lower die base 7 is greater than the width of the lower surface and the worktable of the deep drawing equipment. The middle of the upper surface is provided with a recessed working surface 9 that matches the annular sidewall 3 and the lower surface of the basin bottom of the large deep cavity basin-shaped part 1. The outer side of the recessed working surface 9 is provided with an annular pressing surface 10 that matches the lower surface of the flange edge 2 of the basin-shaped part 1. The lower die adapter plate 8 is provided on the lower surface of the lower die base 7 and is used to connect the worktable of the deep drawing equipment.

[0013] Optionally, the upper surface of the blank holder 11 is narrower than the lower surface, and the lower surface is wider than the outer slider of the deep drawing equipment. The lower surface is provided with an annular blank holder surface 10 corresponding to the upper surface of the lower die base 7. The blank holder adapter plate 12 is connected to the top surface of the blank holder 11 and is used to connect the outer slider of the deep drawing equipment.

[0014] Optionally, the lower die base 7 and the pressing base 11 are provided with matching semi-circular bosses 18 on the outer edge of the annular pressing surface, and guide posts 19 are provided on the semi-circular bosses 18 of the lower die base 7, and guide holes 20 matching the guide posts 19 are provided on the semi-circular bosses 18 of the pressing base 11.

[0015] There are multiple semi-circular bosses 18, which are non-uniformly arranged along the outer edge of the annular pressing surface 10.

[0016] Optionally, the lower die adapter plate 8 is also provided with a positioning pin hole 23 that matches the positioning pin on the worktable of the deep drawing equipment. The positioning pin hole 23 is shaped like a downward-opening trumpet, with the diameter of its upper straight section being larger than the diameter of the positioning pin, and an infrared lamp 24 is also provided at the center of its top surface.

[0017] Optionally, the total height of the upper mold assembly 6 is greater than the sum of the thickness of the pressing edge assembly 5 and the depth of the basin-shaped part 1, the length of the guide boss 22 is greater than the depth of the basin-shaped part 1, and the length of the limiting guide groove 21 is greater than the sum of the length of the guide boss 22 of the upper mold base 14 and the depth of the basin-shaped part 1.

[0018] The width of the lower die adapter plate 8 is less than or equal to the width of the drawing equipment workbench;

[0019] The width of the pressing plate 12 is less than or equal to the width of the outer slider of the drawing equipment;

[0020] The length and width of the upper die adapter plate 16 are less than the length and width of the slider inside the deep drawing equipment.

[0021] Optionally, the lower mold base 7 is provided with a plurality of triangular first reinforcing ribs 27 around its perimeter, the pressing base 11 is provided with a plurality of triangular second reinforcing ribs 28 around its perimeter, and the inner side of the upper mold base 14 is provided with cross reinforcing ribs 29 and annular reinforcing ribs 30, with the cross reinforcing ribs 29 and annular reinforcing ribs 30 being cross-connected.

[0022] Optionally, the included angle between the centers of any adjacent first reinforcing ribs 27 and second reinforcing ribs 28 around the lower mold base 7 and the pressing edge base 11 is inversely proportional to the diameter of the annular pressing edge 10 surface;

[0023] The first reinforcing rib 27 and the second reinforcing rib 28 are evenly distributed on the lower mold base 7 and the pressing base 11 in an alternating manner.

[0024] A second aspect of the present invention provides a clamping method for an automatic clamping double-action deep drawing die for a large deep-cavity basin-shaped part as described in the first aspect, comprising the following steps:

[0025] Step 1: Positioning the drawing die with the automated equipment;

[0026] Step 1-1: Automatic positioning of the lower mold assembly and the equipment

[0027] Install positioning pins on the deep drawing equipment workbench, lift the lower die assembly 4, and insert the positioning pins of the deep drawing equipment workbench into the positioning pin holes 23 of the lower die adapter plate 8 of the lower die assembly 4. The lower die assembly 4 and the equipment workbench are automatically matched in relative position by gravity.

[0028] When the lower mold assembly 4 is automatically positioned with the equipment workbench, the infrared lamp 24 of the lower mold adapter plate 8 of the lower mold assembly 4 is turned on, so that the infrared beam shines on the top of each equipment positioning pin.

[0029] Step 1-2: Adjusting the mold gap

[0030] Several slender gaskets 25 of the same thickness as the basin-shaped part 1 are placed on the upper surface of the lower mold base 7 corresponding to the flange edge 2 of the basin-shaped part 1. The length of the suspended end of the gasket is greater than the depth of the basin-shaped part 1, and the other end is bonded and fixed to the upper surface of the lower mold base 7.

[0031] Steps 1-3: Automatic positioning of the pressure plate assembly and the lower die assembly

[0032] The pressing component 5 is lifted so that the guide post 19 of the lower mold base 7 of the lower mold component 4 is inserted into the guide hole 20 of the pressing component 5 pressing base 11, and the relative position of the pressing component 5 and the lower mold component 4 is automatically matched by the gravity of the pressing component 5.

[0033] Steps 1-4: Automatic positioning of the upper mold assembly and the pressure edge assembly

[0034] The upper mold assembly 6 is lifted so that the guide boss 22 of the upper mold base 14 of the upper mold assembly 6 is inserted into the limiting guide groove 21 of the pressing base 11 of the pressing assembly 5, and the relative positions of the upper mold assembly 6 and the pressing assembly 5 are automatically matched by the gravity of the upper mold assembly 6.

[0035] Step 2: Inspection before fastening the drawing die to the equipment;

[0036] Step 2-1: Press and close the mold

[0037] The outer and inner sliders of the synchronous lowering device are pressed against the top surfaces of the pressing edge adapter plate 12 and the upper mold adapter plate 16, respectively.

[0038] Step 2-2: Inspection of motion interference of the automatic clamping mechanism of the equipment

[0039] Visually inspect the U-shaped mold groove 26 along the horizontal direction of its opening. Observe that the inner contours of any U-shaped mold groove 26 on the lower mold adapter plate 8, the pressing edge adapter plate 12, and the upper mold adapter plate 16 completely cover the corresponding mold grooves on the equipment worktable, the outer slider, and the inner slider.

[0040] Step 3: The drawing die and equipment are automatically fastened together;

[0041] Step 3-1: Secure the upper mold assembly to the slider inside the equipment.

[0042] First, lower the inverted T-shaped pressure plate built into the slider inside the equipment, so that its clamping surface passes through the slider mounting groove and the U-shaped mold mounting groove 26 of the upper mold adapter plate 16 from top to bottom. Then, rotate the inverted T-shaped pressure plate 90 degrees and raise the inverted T-shaped pressure plate, so that its clamping surface applies pressure upward to automatically fasten the upper mold assembly 6 to the bottom of the inner slider.

[0043] Step 3-2: Secure the edge clamping assembly to the outer slider of the equipment.

[0044] First, lower the inverted T-shaped pressure plate placed on the outer slider of the equipment so that its clamping surface is lower than the lower surface of the pressure edge adapter plate 12. Then, move the inverted T-shaped pressure plate horizontally along the outer slider mounting groove to the U-shaped mold mounting groove 26 of the pressure edge adapter plate 12. Raise the inverted T-shaped pressure plate so that its clamping surface is pressed upward to automatically fasten the pressure edge assembly 5 to the bottom of the outer slider.

[0045] Step 3-3: Secure the lower mold assembly to the equipment worktable.

[0046] First, move the inverted T-shaped pressure plate, which is placed on the workbench of the equipment, horizontally along the workbench mounting groove to the U-shaped mounting groove 26 of the lower mold adapter plate 8. Then, raise the inverted T-shaped pressure plate so that its clamping surface applies pressure upwards to automatically fasten the lower mold assembly 4 above the workbench.

[0047] The beneficial effects of this application are as follows:

[0048] This application solves the problem of mold assembly for ultra-large equipment tables by adopting a transfer connection method; it can expand the processing capacity of deep-cavity circular parts of existing equipment from the 1.4-meter level to over 2.8 meters; this application solves the problem of difficult movement of mold components under excessive weight by designing a positioning reference mold component that matches the equipment to achieve automatic gravity-based posture adjustment during lifting; this application solves the problem of automatic matching of relative positions between ultra-large mold components by designing error-proof built-in and external guides. Therefore, the mold structure and assembly method adopted in this application not only overcome the problem of automatic assembly of ultra-large molds due to the limitations of the equipment table for existing large parts, but also further explores the engineering application potential of existing large double-action deep drawing equipment. This technology can be applied to the integral forming of ultra-long and ultra-wide parts. Attached Figure Description

[0049] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0050] Figure 1 This is a schematic diagram of the shape of the basin-shaped component in this application;

[0051] Figure 2 This is a schematic diagram of the assembly structure of the double-action deep drawing die of this application;

[0052] Figure 3 This is a schematic diagram of the top view of the lower die assembly of the double-action deep drawing die in this application;

[0053] Figure 4 This is a bottom view structural diagram of the lower die assembly of the double-action deep drawing die in this application;

[0054] Figure 5 This is a schematic diagram of the double-action drawing die blank holder assembly of this application from a plan view.

[0055] Figure 6 This is a top view of the upper die assembly of the double-action deep drawing die in this application;

[0056] Figure 7 This is a bottom view of the upper die base structure of the double-acting deep drawing die upper die assembly of this application;

[0057] Figure 8 This application Figure 2 A schematic diagram of the cross-sectional structure of a double-action deep drawing die;

[0058] Explanation of reference numerals in the attached figures:

[0059] 1. Basin-shaped part; 2. Flange edge; 3. Annular sidewall; 4. Lower mold assembly; 5. Blanket assembly; 6. Upper mold assembly; 7. Lower mold base; 8. Lower mold adapter plate; 9. Recessed working surface; 10. Annular blanket surface; 11. Blanket base; 12. Blanket adapter plate; 13. Large through hole; 14. Upper mold base; 15. Upper mold seat; 16. Upper mold adapter plate; 17. Working surface; 18. Semi-circular boss; 19. Guide post; 20. Guide hole; 21. Limiting guide groove; 22. Guide boss; 23. Positioning pin hole; 24. Infrared lamp; 25. Gasket; 26. U-shaped mold mounting groove; 27. First reinforcing rib; 28. Second reinforcing rib; 29. ​​Cross reinforcing rib; 30. Annular reinforcing rib. Detailed Implementation

[0060] The present application will be described in further detail below with reference to the accompanying drawings.

[0061] First, we will introduce the problems with traditional double-action deep drawing dies for large, deep-cavity, basin-shaped parts.

[0062] See attached document Figure 1The approximately circular, ultra-large deep-cavity basin-shaped part 1, containing a flange edge 2 and an annular sidewall 3, is one of the typical parts applicable to this application. The diameter of the annular sidewall 3 of the basin-shaped part 1 is about 2.2 meters, and the required unfolded diameter is about 3.1 meters. Currently, the internal slider size of the mainstream large-scale deep drawing equipment in China is only 1.4 meters x 1.65 meters, and the effective size of the worktable and external slider is 1.96 meters x 3.3 meters. However, the clamping mechanism of most equipment is set along the width direction of the worktable and external slider, and the actual maximum blank width that can be formed is only about 1.8 meters. For the integral forming of the ultra-large deep-cavity basin-shaped part 1, the traditional double-action deep drawing die mainly has the following problems: First, the die blank holder 5 and the lower die assembly 4 are far beyond the width of the external slider and worktable of the equipment, and the traditional die cannot be fastened to the equipment. Second, the clamping part of the upper die adapter 12 is further away from the outer contour edge of the blank holder assembly 5, resulting in more serious operational interference and blind spots. Third, the die is large and heavy, with a single component weighing more than 20 tons, making it extremely difficult to manually move and position it on the worktable.

[0063] Next, this application introduces a design scheme for a double-action deep drawing die that addresses the aforementioned deficiencies of the prior art.

[0064] To address the interference issues arising from the movement and connection between the ultra-large double-action drawing die on the equipment table and the clamping system of the automatic clamping equipment, please refer to the attached document. Figure 2-8 The main technical solution of the automatic clamping double-action deep drawing die for large deep cavity basin-shaped parts in this application is as follows:

[0065] A double-acting deep drawing die for automatic clamping of large deep-cavity basin-shaped parts includes: a lower die assembly 4, a pressing assembly 5, and an upper die assembly 6;

[0066] The lower die assembly 4 is fixed on the worktable of the deep drawing equipment; the lower die assembly 4 includes: a lower die base 7 and a lower die adapter plate 8;

[0067] The pressing component 5 includes: pressing base 11 and pressing adapter plate 12; the upper surface of the pressing component 5 is fixedly connected to the outer slider of the deep drawing equipment, and a large through hole 13 is provided in the center of the pressing component 5, and a limit guide groove 21 is provided on the inner wall of the large through hole 13.

[0068] The upper die assembly 6 includes an upper die base 14 and an upper die seat 15. The upper end of the upper die seat 15 is provided with a wider upper die adapter plate 16. The upper surface of the upper die adapter plate 16 is fixedly connected to the inner slider of the deep drawing equipment. The lower surface of the upper die seat 15 is fixedly connected to the upper die base 14. The size of the working surface 17 of the upper die base 14 matches the inner surface size of the large deep cavity basin-shaped part 1 and is larger than the inner hole contour size of the outer slider of the deep drawing equipment. A guide boss 22 matching the limiting guide groove 21 of the pressing component 5 is provided above the upper die base 14. The limiting guide groove 21 is used to limit the downward movement distance of the upper die assembly 6 relative to the pressing component 5.

[0069] The lower die adapter plate 8 of the lower die assembly 4, the pressing edge adapter plate 12 of the pressing edge assembly 5, and the upper die adapter plate 16 of the upper die assembly 6 are respectively provided with a plurality of U-shaped die mounting grooves 26 that match the deep drawing equipment worktable, outer slider, and inner slider mounting groove. The opening direction of the U-shaped die mounting groove 26 is perpendicular to the length direction of the deep drawing equipment worktable, and the width of the U-shaped die mounting groove 26 is greater than the width of the deep drawing equipment mounting groove.

[0070] As a further embodiment of the deep drawing die of the present invention, refer to the appendix. Figure 5 The number of limiting guide grooves 21 in the edge pressing assembly 5 is multiple, and they are non-uniformly arranged along the inner wall of the large through hole 13 of the edge pressing assembly 5. Its main purpose is to avoid safety accidents caused by improper assembly of the near-circular mold edge pressing assembly 5 and upper mold assembly 6.

[0071] As a further embodiment of the deep drawing die of the present invention, refer to the appendix. Figure 2-4 The upper surface of the lower die base 7 is wider than the lower surface and the width of the drawing equipment worktable. A recessed working surface 9, matching the annular sidewall 3 and the lower surface of the basin bottom of the large deep-cavity basin-shaped part 1, is provided in the middle of the upper surface. An annular pressing surface 10, matching the lower surface of the flange edge 2 of the basin-shaped part 1, is provided on the outer side of the recessed working surface 9. The lower die adapter plate 8 is located on the lower surface of the lower die base 7 and is used to connect to the drawing equipment worktable. Its main purpose is to minimize the problems caused by the excessive size and weight of the lower die assembly 4, which could affect the installation of the die and the equipment worktable.

[0072] As a further embodiment of the deep drawing die of the present invention, refer to the appendix. Figure 5 The upper surface of the blank holder 11 is narrower than its lower surface, while the lower surface is wider than the outer slider of the deep drawing equipment. The lower surface has an annular blank holder surface 10 corresponding to the upper surface of the lower die base 7. The blank holder adapter plate 12 is connected to the top surface of the blank holder 11 and is used to connect the outer slider of the deep drawing equipment. Its main purpose is to minimize the size of the blank holder assembly 5, avoiding excessive weight and potential problems with the installation of the die and the outer slider of the equipment.

[0073] As a further embodiment of the deep drawing die of the present invention, refer to the appendix. Figure 2 The lower mold base 7 and the pressing base 11 are provided with matching semi-circular bosses 18 on the outer edge of the annular pressing surface. Guide posts 19 are provided on the semi-circular bosses 18 of the lower mold base 7, and guide holes 20 matching the guide posts 19 are provided on the semi-circular bosses 18 of the pressing base 11. There are multiple semi-circular bosses 18, which are non-uniformly arranged along the outer edge of the annular pressing surface 10. Their main purpose is to avoid safety accidents caused by improper installation of the near-circular mold pressing assembly 5 and the lower mold assembly 4, and to avoid unnecessary repeated lifting of overweight large molds.

[0074] As a further embodiment of the deep drawing die of the present invention, refer to the appendix. Figure 4 Appendix Figure 8The lower die adapter plate 8 is also provided with a positioning pin hole 23 that matches the positioning pin on the worktable of the deep drawing equipment. The positioning pin hole 23 is shaped like a downward-opening trumpet, with the diameter of its upper straight section being larger than the diameter of the positioning pin. An infrared lamp 24 is also provided at the center of its top surface. Its main purpose is to facilitate the operator to observe the lifting of the lower die assembly 4 and the rapid adjustment and positioning of the equipment from a distance, so as to avoid safety accidents caused by excessive swing due to overload.

[0075] As a further embodiment of the deep drawing die of the present invention, refer to the appendix. Figure 5-8 The total height of the upper mold assembly 6 is greater than the sum of the thickness of the pressure edge assembly 5 and the depth of the basin-shaped part 1. The length of the guide boss 22 is greater than the depth of the basin-shaped part 1. The length of the limiting guide groove 21 is greater than the sum of the length of the guide boss 22 and the depth of the basin-shaped part 1 of the upper mold base 14. Its main purpose is to solve the risk of rigid collision during mold opening and closing because the upper mold assembly 6 is larger than the inner hole contour of the outer slider.

[0076] As a further embodiment of the deep drawing die of the present invention, refer to the appendix. Figure 2-6 The width of the lower die adapter plate 8 is less than or equal to the width of the drawing equipment's worktable; the width of the pressing edge adapter plate 12 is less than or equal to the width of the outer slider of the drawing equipment; and the length and width of the upper die adapter plate 16 are less than the length and width of the inner slider of the drawing equipment. Its main purpose is to ensure smooth die installation even when any part of the die is much larger than the corresponding part of the equipment, solving the problem of installing ultra-large dies through an adapter method.

[0077] As a further embodiment of the deep drawing die of the present invention, refer to the appendix. Figure 2-7 The lower mold base 7 is provided with several triangular first reinforcing ribs 27 around its perimeter, and the pressing base 11 is provided with several triangular second reinforcing ribs 28 around its perimeter. The inner side of the upper mold base 14 is provided with cross reinforcing ribs 29 and annular reinforcing ribs 30, which are intersected and connected. The main purpose is to ensure that the mold structure is lightweight while meeting the requirements for load-bearing rigidity.

[0078] As a further embodiment of the deep drawing die of the present invention, the included angle between the centers of any adjacent first reinforcing ribs 27 and second reinforcing ribs 28 around the lower die base 7 and the blank holder base 11 is inversely proportional to the diameter of the annular blank holder surface 10; the first reinforcing ribs 27 and second reinforcing ribs 28 on the lower die base 7 and the blank holder base 11 are evenly distributed in an alternating pattern. Its main purpose is to solve the problem of insufficient load-bearing stiffness and uneven stress caused by excessive weight reduction; specifically, the density of reinforcing ribs needs to be appropriately adjusted according to the size of the die to achieve an optimized match between weight reduction and stiffness.

[0079] The method of using the double-action drawing die of this application for automatic die loading is described again.

[0080] A method for using an automatic clamping double-action deep drawing die for large, deep-cavity basin-shaped parts, as shown in the attached figure. Figure 2-8 This includes the following steps:

[0081] Step 1: Positioning the drawing die with the automated equipment;

[0082] Step 1-1: Automatic positioning of the lower mold assembly and the equipment

[0083] For the installation of ultra-large and ultra-heavy molds, it is important to emphasize that most domestic factories and their equipped overhead cranes generally have a load-bearing capacity of less than 10 tons. Proper use of the molds is crucial to ensuring both safety and installation efficiency. After installing positioning pins on the deep drawing equipment's worktable, the lower mold assembly 4 is lifted, allowing the positioning pins of the worktable to insert into the positioning pin holes 23 of the lower mold adapter plate 8 of the lower mold assembly 4. The lower mold assembly 4 then automatically matches its relative position to the equipment's worktable using its own weight.

[0084] When the lower mold assembly 4 is automatically positioned with the equipment worktable, the infrared lamp 24 of the lower mold adapter plate 8 of the lower mold assembly 4 is turned on, so that the infrared beam shines on the top of each equipment positioning pin. The main purpose is to prevent people from being injured by the hoisting and swinging heavy mold while looking down to observe the mold posture.

[0085] Step 1-2: Adjusting the mold gap

[0086] Several slender gaskets 25 of the same thickness as the basin-shaped part 1 are placed on the upper surface of the lower mold base 7 corresponding to the flange edge 2 of the basin-shaped part 1. The length of the suspended end of the gasket is greater than the depth of the basin-shaped part 1, and the other end is bonded and fixed to the upper surface of the lower mold base 7. The purpose is to ensure that the gap of the effective working surface of the mold is uniformly matched, so that the mold components are in a better matching position relative to the equipment connection before connection.

[0087] Steps 1-3: Automatic positioning of the pressure plate assembly and the lower die assembly

[0088] The pressing component 5 is lifted so that the guide post 19 of the lower mold base 7 of the lower mold component 4 is inserted into the guide hole 20 of the pressing component 5 pressing base 11, and the relative position of the pressing component 5 and the lower mold component 4 is automatically matched by the gravity of the pressing component 5.

[0089] Steps 1-4: Automatic positioning of the upper mold assembly and the pressure edge assembly

[0090] The upper mold assembly 6 is lifted so that the guide boss 22 of the upper mold base 14 of the upper mold assembly 6 is inserted into the limiting guide groove 21 of the pressing base 11 of the pressing assembly 5, and the relative positions of the upper mold assembly 6 and the pressing assembly 5 are automatically matched by the gravity of the upper mold assembly 6.

[0091] Step 2: Inspection before fastening the drawing die to the equipment;

[0092] Step 2-1: Press and close the mold

[0093] The outer and inner sliders of the synchronously lowering device are pressed against the top surfaces of the pressing transition plate 12 and the upper mold transition plate 16, respectively.

[0094] Step 2-2: Inspection of motion interference of the automatic clamping mechanism of the equipment

[0095] Visually inspect the U-shaped mold groove 26 along the horizontal direction of its opening. Observe that the inner contours of any U-shaped mold groove 26 on the lower mold adapter plate 8, the pressing edge adapter plate 12, and the upper mold adapter plate 16 completely cover the corresponding mold grooves on the equipment worktable, the outer slider, and the inner slider.

[0096] Step 3: The drawing die and equipment are automatically fastened together;

[0097] Step 3-1: Secure the upper mold assembly to the slider inside the equipment.

[0098] First, the inverted T-shaped pressure plate built into the slider inside the equipment is lowered, so that its clamping surface passes through the slider mounting groove and the U-shaped mold mounting groove 26 of the upper mold adapter plate 16 from top to bottom. Then, the inverted T-shaped pressure plate is rotated 90 degrees and raised, so that its clamping surface is pressed upward to automatically fasten the upper mold assembly 6 to the bottom of the inner slider.

[0099] Step 3-2: Secure the edge clamping assembly to the outer slider of the equipment.

[0100] First, lower the inverted T-shaped pressure plate placed on the outer slider of the equipment so that its clamping surface is lower than the lower surface of the pressure edge adapter plate 12. Then, move the inverted T-shaped pressure plate horizontally along the outer slider mounting groove to the U-shaped mold mounting groove 26 of the pressure edge adapter plate 12. Raise the inverted T-shaped pressure plate so that its clamping surface is pressed upward to automatically fasten the pressure edge assembly 5 to the bottom of the outer slider.

[0101] Step 3-3: Secure the lower mold assembly to the equipment worktable.

[0102] First, move the inverted T-shaped pressure plate, which is placed on the workbench of the equipment, horizontally along the workbench mounting groove to the U-shaped mounting groove 26 of the lower mold adapter plate 8. Then, raise the inverted T-shaped pressure plate so that its clamping surface applies pressure upwards to automatically fasten the lower mold assembly 4 above the workbench.

[0103] Finally, to facilitate a correct understanding of the inventive intent of this application by those skilled in the art, the following two points need further explanation:

[0104] Firstly, there's the automatic clamping of oversized molds. This involves a core design that perfectly matches the equipment's height, ensuring that any clamping point of the mold's components meets the effective clamping range of the corresponding equipment components. Therefore, traditional automatic mold clamping systems are generally only applicable when any mold component is smaller than the corresponding equipment component. Automatic clamping of oversized molds requires at least two conditions to be met: firstly, the equipment must be equipped with a corresponding automatic clamping system; secondly, any connecting point of the oversized mold's components must meet the effective clamping range of the corresponding equipment components. Large double-action molds exceeding the equipment tabletop not only involve the correct use of the equipment's conventional functions but also address the issue of automatic clamping beyond the equipment's conventional clamping range through mold design and manufacturing. Therefore, realizing large double-action molds exceeding the equipment tabletop is a highly specialized and technically challenging problem in automatic clamping. Those lacking professional knowledge or not in this field are prohibited from attempting this; any economic losses or safety accidents resulting from insufficient technical mastery or limited implementation conditions will be the sole responsibility of the user.

[0105] Secondly, the technical solutions described in the embodiments of this application are not only applicable to large deep-cavity basin-shaped parts, but can also represent ultra-wide and ultra-long large parts. Obviously, the embodiments described in this application are only a part of the present invention, and not all of the embodiments. Therefore, the above are only one of the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications or improvements made to the mold shape to adapt to specific shaped products within the spirit and principles of the present invention should fall within the protection scope of the present invention.

Claims

1. A double-action deep drawing die for automatically clamping large deep-cavity basin-shaped parts, characterized in that, include: Lower die assembly (4), pressing edge assembly (5), upper die assembly (6); The lower die assembly (4) is fixed on the worktable of the deep drawing equipment; The lower mold assembly (4) includes: a lower mold base (7) and a lower mold adapter plate (8); The pressing assembly (5) includes: pressing base (11) and pressing adapter plate (12); the upper surface of the pressing assembly (5) is fixedly connected to the outer slider of the deep drawing equipment, and a large through hole (13) is provided in the center of the pressing assembly (5), and a limit guide groove (21) is provided on the inner wall of the large through hole (13). The upper die assembly (6) includes: an upper die base (14) and an upper die seat (15); the upper end of the upper die seat (15) is provided with a wider upper die adapter plate (16), the upper surface of the upper die adapter plate (16) is fixedly connected to the inner slider of the deep drawing equipment, the lower surface of the upper die seat (15) is fixedly connected to the upper die base (14), the size of the working surface (17) of the upper die base (14) matches the inner surface size of the large deep cavity basin-shaped part (1) and is larger than the inner hole contour size of the outer slider of the deep drawing equipment, and a guide boss (22) matching the limiting guide groove (21) of the pressing assembly (5) is provided above the upper die base (14), the limiting guide groove (21) is used to limit the downward movement distance of the upper die assembly (6) relative to the pressing assembly (5); The lower die adapter plate (8) of the lower die assembly (4), the pressing edge adapter plate (12) of the pressing edge assembly (5), and the upper die adapter plate (16) of the upper die assembly (6) are respectively provided with a plurality of U-shaped mounting grooves (26) that match the deep drawing equipment worktable, the outer slider, and the inner slider mounting groove. The opening direction of the U-shaped mounting groove (26) is perpendicular to the length direction of the deep drawing equipment worktable, and the width of the U-shaped mounting groove (26) is greater than the width of the deep drawing equipment mounting groove. The upper surface of the pressing base (11) is narrower than the lower surface, and the width of the lower surface is wider than the width of the outer slider of the deep drawing equipment. The lower surface is provided with an annular pressing surface corresponding to the upper surface of the lower die base (7). The pressing adapter plate (12) is connected to the top surface of the pressing base (11) and is used to connect the outer slider of the deep drawing equipment.

2. The automatic clamping double-action deep drawing die for large deep-cavity basin-shaped parts according to claim 1, characterized in that, The number of limiting guide grooves (21) of the pressing component (5) is multiple, and they are non-uniformly arranged along the inner wall of the large through hole (13) of the pressing component (5).

3. The automatic clamping double-action deep drawing die for large deep-cavity basin-shaped parts according to claim 1, characterized in that, The upper surface of the lower die base (7) is wider than the lower surface and the width of the drawing equipment worktable. The middle of the upper surface is provided with a recessed working surface (9) that matches the annular sidewall (3) of the large deep cavity basin-shaped part (1) and the lower surface of the basin bottom. The outer side of the recessed working surface (9) is provided with an annular pressing surface that matches the lower surface of the flange edge (2) of the basin-shaped part (1). The lower die adapter plate (8) is set on the lower surface of the lower die base (7) and is used to connect the drawing equipment worktable.

4. The automatic clamping double-action deep drawing die for large deep-cavity basin-shaped parts according to claim 3, characterized in that, The lower die base (7) and the pressing base (11) are provided with matching semi-circular bosses (18) on the outer edge of the annular pressing surface. The semi-circular boss (18) of the lower die base (7) is provided with guide posts (19), and the semi-circular boss (18) of the pressing base (11) is provided with guide holes (20) matching the guide posts (19). There are multiple semi-circular bosses (18), which are non-uniformly arranged along the outer edge of the annular pressing surface.

5. The automatic clamping double-action deep drawing die for large deep-cavity basin-shaped parts according to claim 1, characterized in that, The lower die adapter plate (8) is also provided with a positioning pin hole (23) that matches the positioning pin on the deep drawing equipment workbench. The positioning pin hole (23) is shaped like a downward-opening trumpet, and the diameter of its upper straight section is larger than the diameter of the positioning pin. An infrared lamp (24) is also provided at the center of its top surface.

6. The automatic clamping double-action deep drawing die for large deep-cavity basin-shaped parts according to claim 1, characterized in that, The total height of the upper mold assembly (6) is greater than the sum of the thickness of the pressing edge assembly (5) and the depth of the basin-shaped part (1), the length of the guide boss (22) is greater than the depth of the basin-shaped part (1), and the length of the limiting guide groove (21) is greater than the sum of the length of the guide boss (22) of the upper mold base (14) and the depth of the basin-shaped part (1). The width of the lower die adapter plate (8) is less than or equal to the width of the deep drawing equipment worktable; The width of the pressing transition plate (12) is less than or equal to the width of the outer slider of the deep drawing equipment; The length and width of the upper die adapter plate (16) are less than the length and width of the slider inside the deep drawing equipment.

7. The automatic clamping double-action deep drawing die for large deep-cavity basin-shaped parts according to claim 1, characterized in that, The lower mold base (7) is provided with several triangular first reinforcing ribs (27) around its perimeter, the pressing base (11) is provided with several triangular second reinforcing ribs (28) around its perimeter, and the inner side of the upper mold base (14) is provided with cross reinforcing ribs (29) and ring reinforcing ribs (30), with the cross reinforcing ribs (29) and ring reinforcing ribs (30) being cross-connected.

8. The automatic clamping double-action deep drawing die for large deep-cavity basin-shaped parts according to claim 7, characterized in that, The included angle between the centers of any adjacent first reinforcing rib (27) and second reinforcing rib (28) around the lower mold base (7) and the pressing base (11) is inversely proportional to the diameter of the annular pressing surface; The first reinforcing rib (27) and the second reinforcing rib (28) on the lower mold base (7) and the pressing base (11) are evenly distributed in an alternating manner.

9. A clamping method for an automatic clamping double-action deep drawing die for a large deep-cavity basin-shaped part as described in claim 5, characterized in that, Includes the following steps: Step 1: Positioning the drawing die with the automated equipment; Step 1-1: Automatic positioning of the lower mold assembly and the equipment Install positioning pins on the deep drawing equipment workbench, lift the lower die assembly (4), and insert the positioning pins of the deep drawing equipment workbench into the positioning pin holes (23) of the lower die adapter plate (8) of the lower die assembly (4). The lower die assembly (4) automatically matches the relative position of the lower die assembly (4) with the equipment workbench by relying on the gravity of the lower die assembly (4). When the lower mold assembly (4) is automatically positioned with the equipment workbench, the infrared lamp (24) of the lower mold adapter plate (8) of the lower mold assembly (4) is turned on so that the infrared beam shines on the top of each equipment positioning pin. Step 1-2: Adjusting the mold gap Several slender gaskets (25) of the same thickness as the basin-shaped part (1) are placed on the upper surface of the lower mold base (7) corresponding to the flange edge (2) of the basin-shaped part (1). The length of the suspended end of the gasket is greater than the depth of the basin-shaped part (1), and the other end is bonded and fixed to the upper surface of the lower mold base (7). Steps 1-3: Automatic positioning of the pressure plate assembly and the lower die assembly Lift the pressing assembly (5) so that the guide post (19) of the lower mold base (7) of the lower mold assembly (4) is inserted into the guide hole (20) of the pressing assembly (5) pressing base (11) and the relative position of the pressing assembly (5) and the lower mold assembly (4) is automatically matched by the gravity of the pressing assembly (5); Steps 1-4: Automatic positioning of the upper mold assembly and the pressure edge assembly Lift the upper mold assembly (6) so that the guide boss (22) of the upper mold base (14) of the upper mold assembly (6) is inserted into the limiting guide groove (21) of the pressing base (11) of the pressing assembly (5) and the relative position of the upper mold assembly (6) and the pressing assembly (5) is automatically matched by the gravity of the upper mold assembly (6); Step 2: Inspection before fastening the drawing die to the equipment; Step 2-1: Press and close the mold The outer and inner sliders of the synchronous lowering device are pressed against the top surfaces of the pressing edge adapter plate (12) and the upper mold adapter plate (16), respectively. Step 2-2: Inspection of motion interference of the automatic clamping mechanism of the equipment Visually inspect the U-shaped mold groove (26) along the horizontal direction of the opening of the U-shaped mold groove (26), and observe that the inner contours of any U-shaped mold groove (26) on the lower mold transfer plate (8), the pressing edge transfer plate (12), and the upper mold transfer plate (16) completely cover the corresponding mold grooves of the equipment worktable, the outer slider, and the inner slider. Step 3: The drawing die and equipment are automatically fastened together; Step 3-1: Secure the upper mold assembly to the slider inside the equipment. First, lower the inverted T-shaped pressure plate built into the slider inside the equipment, so that its clamping surface passes through the slider mounting groove and the U-shaped mold mounting groove (26) of the upper mold adapter plate (16) from top to bottom. Then, rotate the inverted T-pressure plate 90 degrees and raise the inverted T-pressure plate so that its clamping surface presses upward to automatically fasten the upper mold assembly (6) to the bottom of the inner slider. Step 3-2: Secure the edge clamping assembly to the outer slider of the equipment. First, lower the inverted T-shaped pressure plate placed on the outer slider of the equipment so that its clamping surface is lower than the lower surface of the pressure edge adapter plate (12). Then, move the inverted T-shaped pressure plate horizontally along the outer slider mounting groove to the U-shaped mold mounting groove (26) of the pressure edge adapter plate (12). Raise the inverted T-shaped pressure plate so that its clamping surface is pressed upward to automatically fasten the pressure edge assembly (5) to the bottom of the outer slider. Step 3-3: Secure the lower mold assembly to the equipment worktable. First, move the inverted T-shaped pressure plate placed on the workbench horizontally along the workbench mounting groove to the U-shaped mounting groove (26) of the lower mold adapter plate (8), then raise the inverted T-shaped pressure plate so that its clamping surface is pressed upward to automatically fasten the lower mold assembly (4) above the workbench.

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