Automatic clamping double-acting deep drawing die for large deep-cavity basin-shaped part and clamping method of automatic clamping double-acting deep drawing die

Abstract

The invention provides an automatic clamping double-acting deep drawing die for a large deep-cavity basin-shaped part and a clamping method of the automatic clamping double-acting deep drawing die. The maximum contours of a lower die assembly, an edge pressing assembly and an upper die assembly of the deep drawing die are obviously larger than the effective clamping range of a working table, an outer sliding block and an inner sliding block of corresponding connecting parts of deep drawing equipment respectively; by designing a lower die assembly, a blank pressing assembly and an upper die assembly of an upper and lower surface profile variable cross-section combined structure, the problems of movement and connection interference between an oversized deep drawing die and a clamping system of automatic clamping equipment are solved by utilizing a die switching part of which the length and the width are respectively not greater than those of an equipment connecting part; triangular, annular and cross-shaped crossed and staggered reinforcing ribs are designed on the upper part of the shell structure mold, so that the structural rigidity of the shell structure mold part is enhanced, and the structural weight of the shell structure mold part is reduced; unequal and uniform external and internal guide mechanisms are designed between mold parts, and positioning pin holes and U-shaped mold containing grooves matched with equipment are designed in mold connecting parts, so that automatic posture adjustment of the overweight mold parts depending on gravity during hoisting is achieved. According to the technology, the machining width limit of double-acting deep drawing equipment can be remarkably improved, and the automatic clamping device can be popularized and applied to automatic clamping of ultra-long and wide large deep-cavity thin-shell part dies.

Description

Technical Field

[0001] The invention relates to a sheet metal manufacturing technology in the field of aircraft manufacturing, in particular to an automatic clamping double-action drawing die for a large deep-cavity basin-shaped part and a clamping method thereof. Background Art

[0002] As the requirements for service life and aerodynamic characteristics of new aircraft continue to increase, the integrated forming of large sheet metal parts will significantly reduce the deformation caused by welding or riveting. It can not only make the structure lighter, but also significantly improve the assembly coordination accuracy and efficiency. Therefore, the integrated forming of ultra-large thin-walled parts is becoming more and more important in aircraft applications.

[0003] As is known, double-action drawing relies on the external slider of the equipment to provide the blank holding force. Compared with single-action drawing, it has significant advantages such as large blank holding area, not easy deformation of the mold, and uniform load. It is especially suitable for large-scale complex deep cavity integral drawing. However, the disadvantages of traditional double-action drawing dies are also very prominent. The reason is that the upper die seat is significantly smaller than the blank holding ring. When the equipment is in the mold closing state, the space between the blank holding ring and the upper die seat is deep and narrow; there are operational interference and visual blind spots. In order to solve the problem of difficulty in mold installation due to the built-in punch, advanced double-action drawing equipment at home and abroad are equipped with automatic clamping systems, and the mold is installed using the equipment's own transmission clamping mechanism. However, the equipment clamping mechanism must be fixed on the equipment, and the adjustable range of movement is limited. It is especially difficult to use the equipment clamping mechanism to install the mold for oversized molds whose mold parts exceed the corresponding equipment parts.

[0004] The effective size of the workbench and outer slide of the existing mainstream double-action deep drawing equipment is 1.96 meters x 3.3 meters, and the theoretical maximum processing width of the blank can reach 3.1 meters. However, the clamping mechanism of most equipment is set along the width direction of the workbench and the outer slide, and the actual maximum width of the blank that can be formed is only about 1.8 meters. For large deep-cavity basin-shaped parts with a blank diameter greater than 2.0 meters, there are still the following problems: First, the mold pressure ring and the lower mold are far larger than the width of the outer slide and workbench of the operating equipment, respectively, and the traditional mold cannot be fastened to the equipment; second, the clamping position of the upper mold seat is farther away from the outer contour margin of the pressure ring, and there are more serious operational interference and visual blind spots. Third, the mold is large and bulky, with a single component weighing more than 20 tons, and it is extremely difficult to move and position on the workbench. Summary of the invention

[0005] The present invention provides a double-action drawing die for automatic clamping of large deep-cavity basin-shaped parts and a clamping method thereof, which solves the problem of automatic clamping of the die on the table of the equipment by adopting a transfer connection method; realizes automatic posture adjustment by gravity when lifting by designing a positioning reference die component that matches the equipment, thereby solving the problem of difficulty in moving overweight parts; realizes automatic matching of the relative positions between overweight die components by designing error-proof internal and external guides.

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

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

[0008] The edge holding assembly 5 comprises: an edge holding base 11 and an edge holding adapter plate 12; the upper surface of the edge holding assembly 5 is fixedly connected to the outer slider of the drawing device, a large through hole 13 is provided at the center of the edge holding assembly 5, and a limited guide groove 21 is provided on the inner wall of the large through hole 13;

[0009] The upper die assembly 6 comprises: an upper die base 14 and an upper die seat 15; an upper die adapter plate 16 with a larger width is provided at the upper end of the upper die seat 15, the upper surface of the upper die adapter plate 16 is fixedly connected to the inner slider of the drawing device, and 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 profile size of the outer slider of the drawing device, and a guide boss 22 matching the limiting guide groove 21 of the edge clamping assembly 5 is provided above the upper die base 14, and the limiting guide groove 21 is used to limit the downward movement distance of the upper die assembly 6 relative to the edge clamping assembly 5;

[0010] The lower die adapter plate 8 of the lower die assembly 4, the edge clamping adapter plate 12 of the edge clamping 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 grooves 26 matching the working table of the drawing equipment, the outer slider, and the inner slider mounting grooves. The opening direction of the U-shaped die groove 26 is perpendicular to the length direction of the working table of the drawing equipment, and the width of the U-shaped die groove 26 is greater than the width of the mounting groove of the drawing equipment.

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

[0012] Optionally, the width of the upper surface of the lower mold base 7 is greater than the width of the lower surface and the workbench of the drawing equipment, and a recessed working surface 9 is provided in the middle of the upper surface, which matches the annular side wall 3 and the lower surface of the basin bottom of the large deep cavity basin-shaped part 1, and an annular pressing surface 10 is provided on the outer side of the recessed working surface 9, which matches the lower surface of the flange edge 2 of the basin-shaped part 1; the lower mold adapter plate 8 is arranged on the lower surface of the lower mold base 7 for connecting to the workbench of the drawing equipment.

[0013] Optionally, the width of the upper surface of the edge holding base 11 is smaller than that of the lower surface, and the width of the lower surface is greater than the width of the outer slider of the drawing equipment. The lower surface is provided with an annular edge holding surface 10 corresponding to the upper surface of the lower mold base 7, and the edge holding adapter plate 12 is connected to the top surface of the edge holding base 11 for connecting the outer slider of the drawing equipment.

[0014] Optionally, the lower mold base 7 and the edge pressing base 11 are provided with mutually matching semicircular bosses 18 on the outer edges of the annular edge pressing surfaces, a guide column 19 is provided on the semicircular boss 18 of the lower mold base 7, and a guide hole 20 matching the guide column 19 is provided on the semicircular boss 18 of the edge pressing base 11;

[0015] There are multiple semicircular bosses 18 which are arranged unevenly along the outer edge of the annular pressure edge 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 workbench of the drawing equipment. The positioning pin hole 23 is in the shape of 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 in the center of its top surface.

[0017] Optionally, the total height of the upper die assembly 6 is greater than the sum of the thickness of the edge pressing assembly 5 and the depth of the basin-shaped member 1, the length of the guide boss 22 is greater than the depth of the basin-shaped member 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 die base 14 and the depth of the basin-shaped member 1;

[0018] The width of the lower die adapter plate 8 is ≤ the width of the workbench of the drawing equipment;

[0019] The width of the edge-pressing adapter plate 12 is less than or equal to the width of the outer slide 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 in the drawing device.

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

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

[0023] The first reinforcing ribs 27 and the second reinforcing ribs 28 on the lower mold base 7 and the edge pressing base 11 are staggered and evenly distributed.

[0024] The second aspect of the present invention provides a method for automatically clamping a double-action 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 and automatic equipment;

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

[0027] Install a positioning pin on the workbench of the drawing equipment, lift the lower die assembly 4, insert the positioning pin of the workbench of the drawing equipment into the positioning pin hole 23 of the lower die adapter plate 8 of the lower die assembly 4, and rely on the gravity of the lower die assembly 4 to automatically match the relative position of the lower die assembly 4 and the equipment workbench;

[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 irradiates the top of each equipment positioning pin;

[0029] Step 1-2: Die Gap Adjustment

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

[0031] Step 1-3: Automatic positioning of the edge clamp assembly and the lower die assembly

[0032] Lift the edge holding assembly 5, insert the guide column 19 of the lower die base 7 of the lower die assembly 4 into the guide hole 20 of the edge holding base 11 of the edge holding assembly 5, and automatically match the relative positions of the edge holding assembly 5 and the lower die assembly 4 by relying on the gravity of the edge holding assembly 5;

[0033] Step 1-4: Automatic positioning of the upper die assembly and the edge clamp assembly

[0034] Lift the upper die assembly 6, insert the guide boss 22 of the upper die base 14 of the upper die assembly 6 into the limiting guide groove 21 of the edge pressing base 11 of the edge pressing assembly 5, and automatically match the relative positions of the upper die assembly 6 and the edge pressing assembly 5 by relying on the gravity of the upper die assembly 6;

[0035] Step 2: Check the drawing die and equipment before fastening;

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

[0037] The outer slide block and the inner slide block of the equipment are synchronously lowered to be pressed against the top surfaces of the edge pressing adapter plate 12 and the upper die adapter plate 16 respectively;

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

[0039] Visually observe the U-shaped die loading groove 26 along the horizontal direction of the opening of the U-shaped die loading groove 26, and observe whether the inner contours of any U-shaped die loading groove 26 on the lower die adapter plate 8, the edge pressing adapter plate 12, and the upper die adapter plate 16 completely cover the die loading grooves at the corresponding positions of the equipment workbench, the outer slide block, and the inner slide block;

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

[0041] Step 3-1: Fasten the upper mold assembly to the slide inside the equipment

[0042] First, lower the inverted T-shaped pressing plate built into the slide block in the device so that its clamping surface passes through the installation groove of the slide block in the device and the U-shaped die mounting groove 26 of the upper die adapter plate 16 from top to bottom, then rotate the inverted T-shaped pressing plate 90 degrees and then raise the inverted T-shaped pressing plate so that its clamping surface is pressed upward to automatically fasten the upper die assembly 6 under the inner slide block;

[0043] Step 3-2: Fasten the edge pressing assembly to the outer slide of the equipment

[0044] First, lower the inverted T-shaped pressure plate externally mounted on the outer slide of the equipment so that its clamping surface is lower than the lower surface of the edge pressing adapter plate 12, then move the inverted T-shaped pressure plate horizontally along the outer slide mounting groove to the U-shaped die mounting groove 26 of the edge pressing adapter plate (12), and raise the inverted T-shaped pressure plate so that its clamping surface is pressed upward to automatically tighten the edge pressing assembly 5 under the outer slide;

[0045] Step 3-3: Fasten the lower mold assembly to the equipment workbench

[0046] First, move the inverted T-shaped pressure plate outside the equipment workbench horizontally along the workbench installation groove to the U-shaped mold groove 26 of the lower mold adapter plate 8, and then raise the inverted T-shaped pressure plate so that its clamping surface is pressed upward to automatically fasten the lower mold assembly 6 above the workbench.

[0047] The beneficial effects of this application are:

[0048] This application solves the problem of over-equipment table mold loading by adopting a transfer connection method; the processing capacity of deep-cavity circular parts of existing equipment can be expanded from 1.4 meters to above 2.8 meters; this application realizes automatic posture adjustment by gravity by designing and matching the positioning reference mold parts with the equipment, solving the problem of overweight mold parts moving difficulties; this application solves the automatic matching of relative positions between overweight mold parts by designing error-proof built-in and external guides. Therefore, the mold structure and mold loading method adopted in this application can not only overcome the existing large parts being limited by the equipment table, restricting the problem of automatic mold loading of oversized molds; but also further explore the engineering application potential of existing large double-action deep drawing equipment, and the technology can be applied to the overall forming of overlong and overwide parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0050] Figure 1 This is a schematic diagram of the shape of the basin-shaped member of the present application;

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

[0052] Figure 3 This is a schematic diagram of the plan view structure of the lower die assembly of the double-action drawing die of the present application;

[0053] Figure 4 This is a bottom view of the structure of the lower die assembly of the double-action drawing die of the present application;

[0054] Figure 5 This is a schematic diagram of the plan view structure of the double-action drawing die edge clamping assembly of the present application;

[0055] Figure 6 It is a schematic diagram of the top view of the upper die assembly of the double-action drawing die of the present application;

[0056] Figure 7 It is a bottom view structural diagram of the upper die base of the upper die assembly of the double-action drawing die of the present application;

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

[0058] Description of reference numerals:

[0059] 1. Basin-shaped part, 2. Flange edge, 3. Annular side wall, 4. Lower die assembly, 5. Bending assembly, 6. Upper die assembly, 7. Lower die base, 8. Lower die adapter plate, 9. Concave working surface, 10. Annular bending surface, 11. Bending base, 12. Bending adapter plate, 13. Large through hole, 14. Upper die base, 15. Upper die seat, 16 Upper die adapter plate, 17. Working surface, 18. Semicircular boss, 19. Guide column, 20. Guide hole, 21. Limiting guide groove, 22. Guide boss, 23. Positioning pin hole, 24. Infrared lamp, 25. Gasket, 26. U-shaped die groove, 27. First reinforcement rib, 28. Second reinforcement rib, 29. Cross reinforcement rib, 30. Annular reinforcement rib. DETAILED DESCRIPTION

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

[0061] Firstly, the existing problems of traditional double-action drawing dies for large deep-cavity basin-shaped parts are introduced.

[0062] Refer to the attached Figure 1, a nearly circular ultra-large deep-cavity basin-shaped part 1 with a flange 2 and an annular side wall 3 is one of the typical parts applicable to this application; the annular side wall 3 of the basin-shaped part 1 has a diameter of about 2.2 meters, and the required unfolded diameter is about 3.1 meters. At present, the inner slider size of the domestic large-scale mainstream drawing equipment is only 1.4 meters x 1.65 meters, and the effective size of the workbench and the outer slider is 1.96 meters x 3.3 meters; however, the clamping mechanism of most equipment is set along the width direction of the workbench and the outer slider, and the actual maximum width of the blank 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 drawing die has the following main problems: First, the mold edge pressing group 5 and the lower mold assembly 6 are far beyond the width of the outer slider and the workbench of the operating equipment, respectively, and the traditional mold cannot be fastened to the equipment; second, the clamping part of the upper mold adapter 12 is farther away from the outer contour margin of the edge pressing assembly 5, and there are more serious operational interference and visual blind spots. Third, the mold is large and bulky, and a single component weighs more than 20 tons, which is extremely difficult to move and position manually on the workbench.

[0063] Secondly, the double-action drawing die design scheme of the present application which solves the above-mentioned defects of the prior art is introduced.

[0064] In order to solve the problem of motion and connection interference between the super large double-action drawing die with super equipment table and the clamping system of automatic clamping equipment, refer to the attached Figure 2-8 The main technical solutions of the automatic clamping double-action drawing die for large deep-cavity basin-shaped parts in this application are as follows:

[0065] A large deep cavity basin-shaped part automatic clamping double-action drawing die, comprising: a lower die assembly 4, a side pressing assembly 5, and an upper die assembly 6;

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

[0067] The edge holding assembly 5 comprises: an edge holding base 11 and an edge holding adapter plate 12; the upper surface of the edge holding assembly 5 is fixedly connected to the outer slider of the drawing device, a large through hole 13 is provided at the center of the edge holding assembly 5, and a limited guide groove 21 is provided on the inner wall of the large through hole 13;

[0068] The upper die assembly 6 comprises: an upper die base 14 and an upper die seat 15; an upper die adapter plate 16 with a larger width is provided at the upper end of the upper die seat 15, the upper surface of the upper die adapter plate 16 is fixedly connected to the inner slider of the drawing device, and 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 profile size of the outer slider of the drawing device, and a guide boss 22 matching the limiting guide groove 21 of the edge clamping assembly 5 is provided above the upper die base 14, and the limiting guide groove 21 is used to limit the downward movement distance of the upper die assembly 6 relative to the edge clamping assembly 5;

[0069] The lower die adapter plate 8 of the lower die assembly 4, the edge clamping adapter plate 12 of the edge clamping 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 grooves 26 matching the working table of the drawing equipment, the outer slider, and the inner slider mounting grooves. The opening direction of the U-shaped die groove 26 is perpendicular to the length direction of the working table of the drawing equipment, and the width of the U-shaped die groove 26 is greater than the width of the mounting groove of the drawing equipment.

[0070] As a further solution of the drawing die of the present invention, refer to the attached Figure 5 The number of the limiting guide grooves 21 of the edge pressing assembly 5 is multiple and is unevenly arranged along the inner wall of the large through hole 13 of the edge pressing assembly 5. The main purpose is to avoid safety accidents caused by mold installation errors of the approximately circular mold edge pressing assembly 5 and the upper mold assembly 6.

[0071] As a further solution of the drawing die of the present invention, refer to the attached Figure 2-4 The width of the upper surface of the lower die base 7 is greater than the width of the lower surface and the workbench of the deep drawing equipment. A concave working surface 9 is provided in the middle of the upper surface to match the annular side wall 3 and the lower surface of the basin bottom of the large deep cavity basin-shaped part 1. The outer side of the concave working surface 9 is provided with an annular pressure edge surface 10 to match 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 to connect the workbench of the deep drawing equipment. Its main purpose is to minimize the problem of the lower die assembly 4 being oversized and easy to be overweight and affecting the installation of the mold and the equipment workbench.

[0072] As a further solution of the drawing die of the present invention, refer to the attached Figure 5 The upper surface width of the blanking base 11 is smaller than the lower surface, and the lower surface width is larger than the width of the outer slide of the drawing equipment. The lower surface is provided with an annular blanking surface 10 corresponding to the upper surface of the lower die base 7. The blanking adapter plate 12 is connected to the top surface of the blanking base 11 and is used to connect the outer slide of the drawing equipment. Its main purpose is to minimize the blanking assembly 5 to avoid overweight due to oversize and affect the installation of the mold and the outer slide of the equipment.

[0073] As a further solution of the drawing die of the present invention, refer to the attached Figure 2 The lower mold base 7 and the edge-pressing base 11 are provided with mutually matching semicircular bosses 18 on the outer edge of the annular edge-pressing surface, a guide column 19 is provided on the semicircular boss 18 of the lower mold base 7, and a guide hole 20 matching the guide column 19 is provided on the semicircular boss 18 of the edge-pressing base 11; there are multiple semicircular bosses 18, which are arranged unevenly along the outer edge of the annular edge-pressing surface 10. The main purpose is to avoid safety accidents caused by mold installation errors of the approximately circular mold edge-pressing assembly 5 and the lower mold assembly 4, and to avoid unnecessary repeated lifting of overweight large molds.

[0074] As a further solution of the drawing die of the present invention, refer to the attached Figure 4 , Attachment Figure 8The lower die adapter plate 8 is also provided with a positioning pin hole 23 that matches the positioning pin on the workbench of the deep drawing equipment. The positioning pin hole 23 is in the shape of a downwardly opening trumpet, and the diameter of the upper straight section is larger than the diameter of the positioning pin. An infrared lamp 24 is also provided at the center of the 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 long distance, so as to avoid safety accidents caused by excessive overweight swing.

[0075] As a further solution of the drawing die of the present invention, refer to the attached Figure 5-8 The total height of the upper mold assembly 6 is greater than the sum of the thickness of the edge pressing assembly 5 and the depth of the basin-shaped member 1, the length of the guide boss 22 is greater than the depth of the basin-shaped member 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 member 1. The main purpose is to solve the risk of rigid collision during mold opening and mold closing because the upper mold assembly 6 is larger than the inner hole contour of the outer slide.

[0076] As a further solution of the drawing die of the present invention, refer to the attached Figure 2-6 , the width of the lower die adapter plate 8 is ≤ the width of the workbench of the drawing equipment; the width of the edge pressing adapter plate 12 is ≤ the width of the outer slide of the drawing equipment; the length and width of the upper die adapter plate 16 are < the length and width of the inner slide of the drawing equipment. Its main purpose is to ensure smooth mold loading when any part of the mold is much larger than the corresponding part of the equipment, and solve the problem of oversized mold loading through the transfer method.

[0077] As a further solution of the drawing die of the present invention, refer to the attached Figure 2-7 The lower mold base 7 is provided with a plurality of triangular first reinforcing ribs 27 along the periphery, the edge-pressing base 11 is provided with a plurality of triangular second reinforcing ribs 28 along the periphery, and the inner side of the upper mold base 14 is provided with cross reinforcing ribs 29 and annular reinforcing ribs 30, and the cross reinforcing ribs 29 are cross-connected with the annular reinforcing ribs 30. The main purpose is to ensure that the mold structure is lightweight while meeting the load-bearing stiffness requirements.

[0078] As a further solution of the deep drawing die of the present invention, the center angle of any adjacent first reinforcing ribs 27 and second reinforcing ribs 28 around the lower die base 7 and the edge holding base 11 is inversely proportional to the diameter of the annular edge holding surface 10; the first reinforcing ribs 27 and the second reinforcing ribs 28 on the lower die base 7 and the edge holding base 11 are staggered and evenly distributed. Its main purpose is to solve the problem of insufficient bearing rigidity and uneven force caused by excessive weight reduction; specifically, the density of the reinforcing ribs needs to be appropriately adjusted according to the size of the die to achieve the effect of optimizing the matching of weight reduction and rigidity.

[0079] The following is an introduction to the method of using the double-action drawing die of the present application for automatic die loading.

[0080] A method for using a double-action drawing die for automatic clamping of large deep-cavity basin-shaped parts, see the attached Figure 2-8 , including the following steps:

[0081] Step 1: Positioning the drawing die and automatic equipment;

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

[0083] What needs to be emphasized for the mold installation of oversized and overweight molds is that the carrying capacity of most domestic factories and their equipped cranes is generally less than 10 tons. Correct use of molds is the guarantee for ensuring safety and mold installation efficiency. Install positioning pins on the workbench of the deep drawing equipment, lift the lower mold assembly 4, insert the positioning pins of the workbench of the deep drawing equipment into the positioning pin holes 23 of the lower mold adapter plate 8 of the lower mold assembly 4, and rely on the gravity of the lower mold assembly 4 to automatically match the relative position of the lower mold assembly 4 and the equipment workbench.

[0084] 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 to irradiate the infrared beam to the top of each equipment positioning pin. The main purpose is to avoid being injured by the heavy mold when the head is lowered to observe the mold posture.

[0085] Step 1-2: Die Gap Adjustment

[0086] A plurality of slender gaskets 25 having the same thickness as the basin-shaped member 1 are placed on the upper surface of the lower mold base 7 corresponding to the flange edge 2 of the basin-shaped member 1. The length of the suspended end of the gasket is greater than the depth of the basin-shaped member 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 between the effective working surfaces of the mold is evenly matched, so that the mold parts are in a better matching position relative to the equipment connection before connection.

[0087] Step 1-3: Automatic positioning of the edge clamp assembly and the lower die assembly

[0088] Lift the edge clamping assembly 5, insert the guide column 19 of the lower mold base 7 of the lower mold assembly 4 into the guide hole 20 of the edge clamping base 11 of the edge clamping assembly 5, and rely on the gravity of the edge clamping assembly 5 to automatically match the relative positions of the edge clamping assembly 5 and the lower mold assembly 4.

[0089] Step 1-4: Automatic positioning of the upper die assembly and the edge clamp assembly

[0090] 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 edge pressing base 11 of the edge pressing assembly 5, and rely on the gravity of the upper mold assembly 6 to automatically match the relative positions of the upper mold assembly 6 and the edge pressing assembly 5.

[0091] Step 2: Check the drawing die and equipment before fastening;

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

[0093] The outer slide block and the inner slide block of the equipment are lowered synchronously so as to be pressed against the top surfaces of the edge pressing adapter plate 12 and the upper die adapter plate 16 respectively.

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

[0095] Visually observe the U-shaped die loading groove 26 along the horizontal direction of the opening of the U-shaped die loading groove 26, and observe whether the inner contour of any U-shaped die loading groove 26 on the lower die adapter plate 8, the edge pressing adapter plate 12, and the upper die adapter plate 16 completely covers the die loading grooves at the corresponding positions of the equipment workbench, the outer slide block, and the inner slide block.

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

[0097] Step 3-1: Fasten the upper mold assembly to the slide inside the equipment

[0098] First, lower the inverted T-shaped pressure plate built into the slider of the device so that its clamping surface passes through the mounting groove of the slider in the device and the U-shaped mold groove 26 of the upper mold adapter plate 16 from top to bottom. Then, rotate the inverted T-shaped pressure plate 90 degrees and then raise the inverted T-shaped pressure plate so that its clamping surface is pressurized upward to automatically tighten the upper mold assembly 6 under the inner slider.

[0099] Step 3-2: Fasten the edge pressing assembly to the outer slide of the equipment

[0100] First, lower the inverted T-shaped pressure plate outside the outer slider of the equipment so that its clamping surface is lower than the lower surface of the edge pressing adapter plate 12, then move the inverted T-shaped pressure plate horizontally along the outer slider installation groove to the U-shaped mold groove 26 of the edge pressing adapter plate (12), and raise the inverted T-shaped pressure plate so that its clamping surface is pressed upward to automatically tighten the edge pressing assembly 5 under the outer slider.

[0101] Step 3-3: Fasten the lower mold assembly to the equipment workbench

[0102] First, move the inverted T-shaped pressure plate outside the equipment workbench horizontally along the workbench installation groove to the U-shaped mold groove 26 of the lower mold adapter plate 8, and then raise the inverted T-shaped pressure plate so that its clamping surface is pressed upward to automatically fasten the lower mold assembly 6 above the workbench.

[0103] Finally, in order to facilitate the technical personnel in this field to correctly understand the invention intention of this application, this application also needs to supplement the following two points:

[0104] The first is the automatic loading of oversized molds, which is a mold connection component with a core design that is highly compatible with the equipment, so that the clamping position of any component of the mold meets the effective clamping range of the corresponding component of the equipment. Therefore, traditional automatic clamping molds are generally only applicable to the situation where any mold component is smaller than the corresponding equipment component. The automatic loading of oversized molds can only be implemented if at least two conditions are met: first, the equipment must be equipped with an automatic clamping system with corresponding functions; second, the connection position of any component of the oversized mold must meet the effective clamping range of the corresponding component of the equipment. Large double-action molds that exceed the equipment table not only involve the correct use of the conventional functions of the equipment, but also reflect the solution of the problem of automatic clamping beyond the conventional clamping range of the equipment through mold design and manufacturing. Therefore, the realization of large double-action molds that exceed the equipment table is a highly specialized, high-tech and comprehensive problem of automatic clamping; those who lack professional knowledge or are not professionals in this field are prohibited from imitating, and they are responsible for the economic losses and safety accidents caused by insufficient technical mastery and limited implementation conditions.

[0105] Second, the technical solution described in the embodiment of the present application is not only applicable to large deep-cavity basin-shaped parts, but also can represent ultra-wide and ultra-long large parts; obviously, the embodiment described in the present application is only a part of the present invention, not all embodiments. Therefore, the above is only one of the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification and improvement of the mold shape to adapt to the specific shape of the product within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A large deep cavity basin-shaped part automatic clamping double-action drawing die, characterized in that: It comprises: a lower die assembly (4), a side pressing assembly (5), and an upper die assembly (6); The lower die assembly (4) is fixed on a workbench of the drawing equipment; The lower mold assembly (4) comprises: a lower mold base (7) and a lower mold adapter plate (8); The edge holding assembly (5) comprises: an edge holding base (11) and an edge holding adapter plate (12); the upper surface of the edge holding assembly (5) is fixedly connected to the outer slide block of the drawing device, a large through hole (13) is provided at the center of the edge holding assembly (5), and a limited guide groove (21) is provided on the inner wall of the large through hole (13); The upper die assembly (6) comprises: an upper die base (14) and an upper die seat (15); the upper end of the upper die seat (15) is provided with an upper die adapter plate (16) with a larger width, the upper surface of the upper die adapter plate (16) is fixedly connected to the inner slider of the drawing device, 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 profile size of the outer slider of the drawing device, and a guide boss (22) matching the limiting guide groove (21) of the edge pressing assembly (5) is provided above the upper die base (14), and the limiting guide groove (21) is used to limit the downward movement distance of the upper die assembly (6) relative to the edge pressing assembly (5); The lower die adapter plate (8) of the lower die assembly (4), the edge clamp adapter plate (12) of the edge clamp 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) matching the working table of the deep drawing equipment, the outer slide block, and the inner slide block mounting grooves. The opening direction of the U-shaped die mounting groove (26) is perpendicular to the length direction of the working table of the deep drawing equipment, and the width of the U-shaped die mounting groove (26) is greater than the width of the mounting groove of the deep drawing equipment.

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

3. The large deep cavity basin-shaped automatic clamping double-action drawing die according to claim 1 is characterized in that: The width of the upper surface of the lower die base (7) is greater than the width of the lower surface and the workbench of the drawing equipment. A recessed working surface (9) is provided in the middle of the upper surface, which matches the annular side wall (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, which matches the lower surface of the flange edge (2) of the basin-shaped part (1). The lower die adapter plate (8) is arranged on the lower surface of the lower die base (7) for connecting to the workbench of the drawing equipment.

4. The large deep cavity basin-shaped automatic clamping double-action drawing die according to claim 3 is characterized in that: The width of the upper surface of the edge holding base (11) is smaller than that of the lower surface, and the width of the lower surface is larger than the width of the outer slide of the drawing equipment. The lower surface is provided with an annular edge holding surface corresponding to the upper surface of the lower mold base (7). The edge holding adapter plate (12) is connected to the top surface of the edge holding base (11) and is used to connect the outer slide of the drawing equipment.

5. The large deep cavity basin-shaped automatic clamping double-action drawing die according to claim 4 is characterized in that: The lower die base (7) and the edge-pressing base (11) are provided with mutually matching semicircular bosses (18) on the outer edges of the annular edge-pressing surfaces, a guide column (19) is provided on the semicircular boss (18) of the lower die base (7), and a guide hole (20) matching the guide column (19) is provided on the semicircular boss (18) of the edge-pressing base (11); There are multiple semicircular bosses (18) which are arranged unevenly along the outer edge of the annular pressure edge surface.

6. The large deep cavity basin-shaped automatic clamping double-action drawing die according to claim 1 is characterized in that: The lower die adapter plate (8) is also provided with a positioning pin hole (23) matching the positioning pin on the workbench of the drawing equipment. The positioning pin hole (23) is in the shape of a downwardly opening trumpet, the diameter of the upper straight section of which is larger than the diameter of the positioning pin, and an infrared lamp (24) is also provided at the center of the top surface.

7. The large deep cavity basin-shaped automatic clamping double-action drawing die according to claim 1 is characterized in that: The total height of the upper die assembly (6) is greater than the sum of the thickness of the edge pressing assembly (5) and the depth of the basin-shaped member (1), the length of the guide boss (22) is greater than the depth of the basin-shaped member (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 die base (14) and the depth of the basin-shaped member (1); The width of the lower die adapter plate (8) is less than or equal to the width of the workbench of the drawing equipment; The width of the edge-pressing adapter plate (12) is less than or equal to the width of the outer slide block of the drawing equipment; The length and width of the upper die adapter plate (16) are less than the length and width of the slider in the drawing equipment.

8. The large deep cavity basin-shaped automatic clamping double-action drawing die according to claim 1 is characterized in that: The lower mold base (7) is provided with a plurality of triangular first reinforcing ribs (27) along its four sides, the edge pressing base (11) is provided with a plurality of triangular second reinforcing ribs (28) along its four sides, and the inner side of the upper mold base (14) is provided with cross reinforcing ribs (29) and annular reinforcing ribs (30), and the cross reinforcing ribs (29) and the annular reinforcing ribs (30) are cross-connected.

9. The large deep cavity basin-shaped automatic clamping double-action drawing die according to claim 8, characterized in that: The center angle of any adjacent first reinforcing ribs (27) and second reinforcing ribs (28) around the lower mold base (7) and the edge-pressing base (11) is inversely proportional to the diameter of the annular edge-pressing surface; The first reinforcing ribs (27) and the second reinforcing ribs (28) on the lower mold base (7) and the edge pressing base (11) are staggered and evenly distributed.

10. A method for automatically clamping a double-action drawing die for a large deep-cavity basin-shaped part as claimed in claim 6, characterized in that , including the following steps: Step 1: Positioning the drawing die and automatic equipment; Step 1-1: Automatic positioning of the lower mold assembly and the equipment A positioning pin is installed on the workbench of the drawing equipment, and the lower die assembly (4) is lifted so that the positioning pin of the workbench of the drawing equipment is inserted into the positioning pin hole (23) of the lower die adapter plate (8) of the lower die assembly (4), and the relative position of the lower die assembly (4) and the equipment workbench are automatically matched by relying on the gravity of the lower die assembly (4); When the lower mold assembly (4) and the equipment workbench are automatically positioned, the infrared lamp (24) of the lower mold adapter plate (8) of the lower mold assembly (4) is turned on so that the infrared light beam is irradiated to the top of each equipment positioning pin; Step 1-2: Die Gap Adjustment A plurality of slender gaskets (25) having the same thickness as the basin-shaped member (1) are placed on the upper surface of the lower mold base (7) corresponding to the flange edge (2) of the basin-shaped member (1), wherein the length of the suspended end of the gasket is greater than the depth of the basin-shaped member (1), and the other end is bonded and fixed to the upper surface of the lower mold base (7); Step 1-3: Automatic positioning of the edge clamp assembly and the lower die assembly Lift the edge holding assembly (5) so that the guide column (19) of the lower die base (7) of the lower die assembly (4) is inserted into the guide hole (20) of the edge holding base (11) of the edge holding assembly (5), and the relative positions of the edge holding assembly (5) and the lower die assembly (4) are automatically matched by relying on the gravity of the edge holding assembly (5); Step 1-4: Automatic positioning of the upper die assembly and the edge clamp assembly Lift the upper die assembly (6) so that the guide boss (22) of the upper die base (14) of the upper die assembly (6) is inserted into the limiting guide groove (21) of the edge pressing base (11) of the edge pressing assembly (5), and the relative positions of the upper die assembly (6) and the edge pressing assembly (5) are automatically matched by relying on the gravity of the upper die assembly (6); Step 2: Check the drawing die and equipment before fastening; Step 2-1: Press and close the mold Synchronously lowering the outer slide block and the inner slide block of the equipment so that they are pressed against the top surfaces of the edge pressing adapter plate (12) and the upper die adapter plate (16) respectively; Step 2-2: Check the motion interference of the automatic clamping mechanism of the equipment Visually observe the U-shaped die loading groove (26) along the horizontal direction of the opening of the U-shaped die loading groove (26), and observe whether the inner contour of any U-shaped die loading groove 26 on the lower die adapter plate (8), the edge pressing adapter plate (12), and the upper die adapter plate (16) completely covers the die loading grooves at the corresponding positions of the equipment workbench, the outer slide block, and the inner slide block; Step 3: the drawing die and the equipment are automatically fastened; Step 3-1: Fasten the upper mold assembly to the slide inside the equipment First, the inverted T-shaped pressing plate built into the slide block of the device is lowered so that its clamping surface passes through the installation groove of the slide block of the device and the U-shaped mold mounting groove (26) of the upper mold adapter plate (16) from top to bottom in sequence. Then, the inverted T-shaped pressing plate is rotated 90 degrees and then raised so that its clamping surface is pressed upward to automatically fasten the upper mold assembly (6) below the inner slide block. Step 3-2: Fasten the edge pressing assembly to the outer slide of the equipment First, the inverted T-shaped pressure plate externally mounted on the outer slide of the equipment is lowered so that its clamping surface is lower than the lower surface of the edge pressing adapter plate (12), and then the inverted T-shaped pressure plate is horizontally moved along the outer slide mounting groove to the U-shaped die mounting groove (26) of the edge pressing adapter plate (12), and the inverted T-shaped pressure plate is raised so that its clamping surface is pressed upward to automatically tighten the edge pressing assembly (5) below the outer slide; Step 3-3: Fasten the lower mold assembly to the equipment workbench First, an inverted T-shaped pressing plate externally arranged on the equipment workbench is horizontally moved along the workbench mounting groove to the U-shaped die mounting groove (26) of the lower die adapter plate (8), and then the inverted T-shaped pressing plate is raised to apply pressure upward on its clamping surface to automatically fasten the lower die assembly (6) above the workbench.

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