Aerospace aluminum alloy forging stamping device

Abstract

The application relates to the field of aviation forging stamping processing technology, in particular to an aviation aluminum alloy forging stamping device, which comprises a lower die seat and an upper die seat, the upper surface of the lower die seat is rotationally connected with a vertical arranged screw rod through a bearing, and the inside of the lower die seat is provided with a driving assembly for driving the screw rod to rotate; the lower surface of the upper die seat is provided with a T-shaped sliding groove, and the screw rod is threadedly connected with a T-shaped sliding block; after forging pressure shaping is completed, the equipment drives the upper die seat to rise to the limit position through the screw rod and releases the vertical transmission limiting, then the upper die seat and the male die core are driven to laterally deviate by a cylinder, and an open operation space is formed; meanwhile, the telescopic rod automatically acts to pry the mounting frame, drives the female die core to be lifted up and separated from the lower die seat hoop constraint, releases the workpiece adhering internal stress, avoids die jamming and death, eliminates workpiece damage caused by manual strong prying, realizes workpiece damage-free material taking, and provides sufficient operation space for die core maintenance, disassembly and replacement.

Description

Technical Field

[0001] This invention relates to the field of aerospace forging stamping technology, specifically to an aerospace aluminum alloy forging stamping apparatus. Background Technology

[0002] Aerospace aluminum alloy forgings are high-precision thin-walled elastic components. After stamping, they are easy to fit tightly into the mold cavity, which places extremely high demands on the material handling space and the rationality of the stripping structure of the stamping equipment.

[0003] Existing traditional stamping equipment has a fixed structure, with the die core always embedded and fixed inside the lower die base. It is constrained and limited by the groove structure of the lower die base throughout the process, and the cavity is in a state of rigid constraint. After the forging is stamped, the stress between the workpiece and the die core cannot be released, and the cavity binding force is large, which easily leads to workpiece jamming and seizing. At the same time, the die base of the traditional equipment only has a vertical lifting function. It cannot be moved laterally after stamping. The upper die structure continuously blocks the area above the die, resulting in a small material handling space and limited operating vision. Operators cannot smoothly reach in the tool to remove the material and can only manually pry it off. This can easily cause scratches, deformation, chipping and scrapping of precision forgings, which seriously affects the product accuracy and yield. Therefore, it is necessary to propose a stamping processing device for aerospace aluminum alloy forgings. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a stamping apparatus for aerospace aluminum alloy forgings.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a stamping processing device for aerospace aluminum alloy forgings, including a lower die base and an upper die base, wherein a vertically arranged lead screw is rotatably connected to the upper surface of the lower die base through a bearing, and a drive assembly for driving the lead screw to rotate is provided inside the lower die base; The lower surface of the upper mold base is provided with a T-shaped slide groove, and a T-shaped slider is threadedly connected to the lead screw. The T-shaped slider is slidably adapted to the inside of the T-shaped slide groove and can slide laterally along the T-shaped slide groove. A limit block is fixedly connected to the top of the lead screw. A limit hole is provided through the upper mold base. A limit groove is provided on the T-shaped slider. A cylinder assembly for driving the T-shaped slider to move laterally is provided in the T-shaped slide groove. The upper surface of the lower mold base is provided with a first mounting groove, and a mounting bracket is rotatably connected in the first mounting groove via a rotating shaft. The lower surface of the upper mold base is provided with a second mounting groove. Both the mounting bracket and the second mounting groove are provided with threaded assemblies. A concave mold core is fixedly mounted on the mounting bracket via a bolt assembly, and a convex mold core is fixedly mounted in the second mounting groove via a bolt assembly. The mounting bracket has a fixing groove, and a telescopic rod is fixedly installed in the fixing groove. The upper end of the telescopic rod is rotatably connected to the lower surface of the upper mold base through a rotating shaft.

[0006] Specifically, the drive assembly includes a mounting cavity located inside the lower mold base. A dual-head servo motor is fixedly installed inside the mounting cavity. Both output ends of the dual-head servo motor are fixedly connected to drive rods via couplings. A first bevel gear is fixedly sleeved on the wall of each of the two drive rods. The lower ends of both lead screws extend through into the mounting cavity, and a second bevel gear is fixedly connected to the lower ends of both lead screws within the mounting cavity. The two first bevel gears mesh with the corresponding second bevel gears.

[0007] Specifically, the end of the drive rod away from the dual-head servo motor is rotatably connected to the two side walls of the mounting cavity via bearings.

[0008] Specifically, the cylinder assembly includes a drive cylinder and a piston rod. The drive cylinder is fixedly installed on the wall of a T-shaped slide groove, and the output end of the drive cylinder is movably connected to the piston rod. The end of the piston rod is fixedly connected to the T-shaped slider.

[0009] Specifically, the drive cylinder and piston rod are both arranged horizontally and are parallel to the T-shaped slide groove and the T-shaped slider.

[0010] Specifically, the bolt assembly includes two sets of threaded grooves and two sets of threaded holes. One set of threaded grooves is formed on the outer side wall of the mounting bracket, and the other set of threaded grooves is formed on the upper surface of the punch core. One set of threaded holes is formed through the lower end of the die core, and the other set of threaded holes is formed on the top wall of the second mounting groove and penetrates the upper surface of the upper mold base. The two sets of threaded grooves are respectively threadedly connected to the corresponding threaded holes with mounting bolts.

[0011] Specifically, the mounting bracket is L-shaped, and the outer wall and lower surface of the die core are in contact with the mounting bracket. The upper surfaces of the mounting bracket and the die core are flush with the upper surface of the lower mold base.

[0012] Specifically, both the fixing groove and the telescopic rod are vertically arranged, and the fixing groove and the pivot position at the top of the telescopic rod correspond to each other.

[0013] Specifically, the sidewall of the die core is provided with an arc-shaped surface, and the arc-shaped surface is set with the rotating shaft on the mounting bracket as the axis.

[0014] The beneficial effects of this invention are as follows: The aerospace aluminum alloy forging stamping device of this invention, after the forging is pressure-held and shaped, firstly drives the upper die holder to rise to its top limit position via a lead screw, and then precisely releases the vertical transmission limit between the lead screw and the upper die holder through a limiting structure, eliminating structural motion interference. Subsequently, a cylinder drives a T-shaped slider to slide laterally along a T-shaped groove, causing the upper die holder and the bottom punch core to shift laterally as a whole, orderly opening the working space above the die core and the formed forging, overcoming the drawbacks of traditional closed mold operation limitations. Simultaneously, in the synchronous process of the upper die holder's lateral movement, the top of the telescopic rod is rotatable and the entire structure is extendable. The adaptive structural characteristics of the shrinkage automatically generate a stable tilting prying force with the lateral displacement of the upper mold base, driving the L-shaped mounting bracket to rotate and lift around the bottom pivot, causing the entire die core to lift synchronously. With the combined effect of lateral mold offset, fully open working space and lifting of the die core, the die core, which was originally embedded in the lower mold base and constrained by the groove, is released from rigid limit, effectively releasing the internal stress between the forging and the cavity, avoiding workpiece jamming and seizing, eliminating the need for manual prying of the workpiece, and preventing quality defects such as scratches, deformation, and chipping of the forging, completing the non-destructive material handling of precision forgings, while providing sufficient operating space for die core wear inspection, specification disassembly and replacement. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 A schematic diagram of the external structure of a stamping device for aerospace aluminum alloy forgings under normal operating conditions, provided by the present invention; Figure 2 A schematic diagram of the external structure of a stamping device for aerospace aluminum alloy forgings in the part-taking state, provided by the present invention; Figure 3 An internal cross-sectional view of the upper die holder of an aerospace aluminum alloy forging stamping device provided by the present invention, in its normal operating state; Figure 4 An internal cross-sectional view of the upper die holder in the part-removal state of a stamping device for aerospace aluminum alloy forgings provided by the present invention; Figure 5 An internal sectional view of the connection between the upper die holder and the punch core in a stamping device for aerospace aluminum alloy forgings provided by the present invention; Figure 6 An internal sectional view of the lower die holder of an aerospace aluminum alloy forging stamping device provided by the present invention; Figure 7 This invention provides a schematic diagram of the connection structure between the mounting bracket and the die core of an aerospace aluminum alloy forging stamping device.

[0017] In the diagram: 1. Lower mold base; 2. Upper mold base; 3. Lead screw; 4. T-shaped slide; 5. T-shaped slider; 6. Limiting block; 7. Limiting hole; 8. Limiting groove; 9. First mounting groove; 10. Mounting bracket; 11. Second mounting groove; 12. Die core; 13. Punch core; 14. Fixing groove; 15. Telescopic rod; 16. Mounting cavity; 17. Dual-head servo motor; 18. Drive rod; 19. First bevel gear; 20. Second bevel gear; 21. Threaded groove; 22. Threaded hole; 23. Mounting bolt; 24. Drive cylinder; 25. Piston rod. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] like Figures 1-7 As shown, the present invention provides the following technical solution: Example 1: A stamping device for aerospace aluminum alloy forgings includes a lower die base 1 and an upper die base 2. The upper surface of the lower die base 1 is rotatably connected to a vertically arranged lead screw 3 via a bearing. The interior of the lower die base 1 is provided with a drive assembly for driving the lead screw 3 to rotate. The lower surface of the upper mold base 2 is provided with a T-shaped slide groove 4, and a T-shaped slider 5 is threadedly connected to the lead screw 3. The T-shaped slider 5 is slidably adapted to the inside of the T-shaped slide groove 4 and can slide laterally along the T-shaped slide groove 4. A limit block 6 is fixedly connected to the top of the lead screw 3. A limit hole 7 is provided through the upper mold base 2. A limit groove 8 is provided on the T-shaped slider 5. A cylinder assembly for driving the T-shaped slider 5 to move laterally is provided in the T-shaped slide groove 4. The upper surface of the lower mold base 1 is provided with a first mounting groove 9, and a mounting bracket 10 is rotatably connected in the first mounting groove 9 via a rotating shaft. The lower surface of the upper mold base 2 is provided with a second mounting groove 11. Both the mounting bracket 10 and the second mounting groove 11 are provided with threaded assemblies. A concave mold core 12 is fixedly mounted on the mounting bracket 10 by a bolt assembly, and a convex mold core 13 is fixedly mounted in the second mounting groove 11 by a bolt assembly. The mounting bracket 10 has a fixing groove 14, and a telescopic rod 15 is fixedly installed in the fixing groove 14. The upper end of the telescopic rod 15 is rotatably connected to the lower surface of the upper mold base 2 through a rotating shaft.

[0020] The cylinder assembly includes a drive cylinder 24 and a piston rod 25. The drive cylinder 24 is fixedly installed on the wall of the T-shaped slide groove 4, and the output end of the drive cylinder 24 is movably connected to the piston rod 25. The end of the piston rod 25 is fixedly connected to the T-shaped slider 5. Both the drive cylinder 24 and the piston rod 25 are arranged horizontally and are parallel to the T-shaped slide groove 4 and the T-shaped slider 5. This parallel layout structure allows the thrust of the drive cylinder 24 to be output linearly along the horizontal direction of the T-shaped slide groove 4, eliminating the lateral component force in the transverse transmission process, avoiding the T-shaped slider 5 from jamming or shifting, ensuring smooth and accurate alignment of the upper mold base 2 during transverse translation, and effectively improving the mold position switching accuracy.

[0021] The mounting bracket 10 is L-shaped, and the outer wall and lower surface of the die core 12 are in contact with the mounting bracket 10. The upper surfaces of the mounting bracket 10 and the die core 12 are flush with the upper surface of the lower die base 1. The L-shaped mounting bracket 10 and the die core 12 are fully in contact with the first mounting groove 9 to increase the contact area and effectively resist the high pressure impact of stamping, preventing the die core 12 from loosening or deforming under pressure. The overall flush structure can ensure that the stamping working surface is flat and uniform, avoiding the tilting or suspended stress of the aerospace aluminum alloy forgings to be processed, and ensuring the flatness and dimensional accuracy of the forging stamping.

[0022] The fixing groove 14 and the telescopic rod 15 are both vertically arranged, and the fixing groove 14 corresponds to the pivot position at the top of the telescopic rod 15. The pivot part at the top of the telescopic rod 15 can be stored in the fixing groove 14 to avoid affecting the fit between the upper mold base 2 and the lower mold base 1.

[0023] The side wall of the die core 12 is provided with an arc-shaped surface, and the arc-shaped surface is set with the rotating shaft on the mounting frame 10 as the axis, so that when the mounting frame 10 rotates, the arc-shaped surface of the die core 12 will fit with the groove of the first mounting groove 9, without affecting the entry and exit of the die core 12.

[0024] When using it, the following steps are included: The first step involves placing the aerospace aluminum alloy forging to be processed stably inside the forming groove of the die core 12, relying on the die core 12 to achieve precise positioning and prevent workpiece displacement. Then, the drive assembly is activated, which drives the lead screw 3 to rotate at a constant speed. The ball bearings circulate and transmit along the raceway, converting the rotational torque into a linear axial thrust, which drives the T-shaped slider 5 to move vertically. The T-shaped slider 5, together with the T-shaped slide 4, drives the upper die base 2 to move smoothly up and down as a whole. The upper die base 2 simultaneously drives the bottom punch core 13 to move down. Through the precise mold closing and extrusion of the punch core 13 and the die core 12, the aerospace aluminum alloy forging inside is subjected to high-pressure stamping. The precision forming process of the forging is completed based on the preset contour of the die core. The second step involves the significant plasticity and elasticity of aerospace aluminum alloy materials, which are prone to elastic springback deformation after a single stamping process. Therefore, after the initial forming of the forging, the upper die holder 2 and the punch core 13 are continuously driven to move downwards in small increments until the upper die holder 2 and the lower die holder 1 are tightly fitted together, so that the punch core 13 and the concave die core 12 are completely closed. A constant stamping pressure is maintained on the formed forging, and the elastic springback stress of the aluminum alloy forging is offset by the pressure holding and shaping method, locking the forming size and contour of the forging. This completely avoids the problem of deformation and dimensional deviation caused by the elastic recovery of the forging after demolding, ensuring the processing accuracy of aerospace components. In the third step, after the forging is held under pressure and shaped, the drive screw 3 reverses, causing the upper die base 2 and the punch core 13 to rise smoothly. When it rises to the preset top limit position, the limiting block 6 at the top of the screw 3 passes through the limiting hole 7 of the upper die base 2 and gets stuck in the limiting groove 8 of the T-shaped slider 5, releasing the vertical transmission limit between the screw 3 and the upper die base 2. At this time, the drive cylinder 24 is activated, and the drive cylinder 24 pushes the piston rod 25 to extend laterally. With the screw 3 as the support fulcrum, the T-shaped slider 5 slides laterally inside the T-shaped slide groove 4, thereby pulling the upper die base 2 to move laterally outward, so that the upper die base 2 and the punch core 13 are completely separated from the area above the die core 12, fully exposing the die core 12 below and the formed forging, providing sufficient operating space for subsequent part removal and die core inspection and replacement. Fourth step: While the upper mold base 2 moves laterally, the bottom of the upper mold base 2 will drive the top of the telescopic rod 15 to move synchronously. The bottom of the telescopic rod 15 is fixed in the fixing groove 14 of the mounting frame 10, so that the top of the telescopic rod 15 can adaptively rotate and synchronously extend and retract based on the top rotating shaft during the movement of the upper mold base 2, forming a tilting thrust. After the telescopic rod 15 is tilted and subjected to force, it pries the L-shaped mounting frame 10 in the opposite direction, causing the mounting frame 10 to flip with the bottom rotating shaft as the fulcrum, causing the end of the mounting frame 10 and the fixed concave mold core 12 above it to tilt upward, thereby facilitating the removal of the forging of the concave mold core 12, and allowing the tilted concave mold core 12 to be directly disassembled and replaced, greatly improving the efficiency of mold changing and part removal, and avoiding damage to the workpiece and mold core caused by manual prying.

[0025] Example 2: The technical solutions in this example that differ from Example 1 include: The drive assembly includes a mounting cavity 16, which is located inside the lower mold base 1. A dual-head servo motor 17 is fixedly mounted inside the mounting cavity 16. Both output ends of the dual-head servo motor 17 are fixedly connected to drive rods 18 via couplings. First bevel gears 19 are fixedly sleeved on the walls of both drive rods 18. The lower ends of both lead screws 3 extend through into the mounting cavity 16, and the lower ends of both lead screws 3 located in the mounting cavity 16 are fixedly connected to second bevel gears 20. The two first bevel gears 19 are respectively meshed with the corresponding second bevel gears 20. The end of the drive rod 18 away from the dual-head servo motor 17 is respectively connected to... The bearings are rotatably connected to the two side walls of the mounting cavity 16. When the dual-head servo motor 17 is started, the output ends of the dual-head servo motor 17 synchronously and at the same speed drive the two drive rods 18 to rotate. The two drive rods 18 drive the corresponding first bevel gears 19 to rotate synchronously. Through the bevel gear meshing transmission principle, the two second bevel gears 20 are driven to rotate synchronously in the same direction, thereby driving the two lead screws 3 to move up and down synchronously. The symmetrical drive structure of the double lead screws 3 can ensure that the upper die seat 2 is subjected to uniform force and the lifting and lowering is stable. It effectively eliminates the problems of die misalignment and uneven stamping force caused by unilateral transmission offset, further improving the symmetry and dimensional accuracy of aerospace forging stamping, and adapting to the processing requirements of high-precision aerospace components.

[0026] Example 3: The technical solutions in this example that differ from those in Example 2 include: The bolt assembly includes two sets of threaded grooves 21 and two sets of threaded holes 22. One set of threaded grooves 21 is formed on the outer side wall of the mounting bracket 10, and the other set of threaded grooves 21 is formed on the upper surface of the punch core 13. One set of threaded holes 22 is formed through the lower end of the die core 12, and the other set of threaded holes 22 is formed on the top wall of the second mounting groove 11 and penetrates the upper surface of the upper mold base 2. The two sets of threaded grooves 21 are respectively threadedly connected to the corresponding threaded holes 22 with mounting bolts 23. First, the punch core 13 is embedded into the second mounting groove 11 of the upper mold base 2. The punch core 13 is precisely positioned by the groove limit of the second mounting groove 11, so that the threaded groove 21 at the top of the punch core 13 is automatically aligned with the threaded hole 22 of the upper mold base 2. Then, the mounting bolt 23 is screwed in to lock and fix the punch core 13. Next, the concave mold core 12 is placed on the mating surface of the L-shaped mounting bracket 10. The position of the concave mold core 12 is finely adjusted so that the threaded hole 22 at the bottom of the concave mold core 12 is precisely aligned with the threaded groove 21 on the side wall of the mounting bracket 10. The mounting bolt 23 is then tightened to complete the fixed installation of the concave mold core 12. When disassembling and replacing, simply unscrew the corresponding mounting bolts 23 to remove the worn or damaged punch core 13 or die core 12 separately without disassembling the entire mold. This makes disassembly and assembly convenient and precise, significantly reducing the maintenance and replacement costs of the die core and adapting to the transformation and processing of various specifications of aerospace aluminum alloy forgings.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stamping apparatus for aerospace aluminum alloy forgings, comprising a lower die holder (1) and an upper die holder (2), characterized in that, The upper surface of the lower mold base (1) is rotatably connected to a vertically arranged lead screw (3) via a bearing, and the interior of the lower mold base (1) is provided with a drive assembly for driving the lead screw (3) to rotate. The lower surface of the upper mold base (2) is provided with a T-shaped slide groove (4), and a T-shaped slider (5) is threadedly connected to the lead screw (3). The T-shaped slider (5) is slidably adapted to the inside of the T-shaped slide groove (4) and can slide laterally along the T-shaped slide groove (4). A limit block (6) is fixedly connected to the top of the lead screw (3). A limit hole (7) is opened through the upper mold base (2), and a limit groove (8) is opened on the T-shaped slider (5). A cylinder assembly for driving the T-shaped slider (5) to move laterally is provided in the T-shaped slide groove (4). The upper surface of the lower mold base (1) is provided with a first mounting groove (9), and a mounting bracket (10) is rotatably connected in the first mounting groove (9) via a rotating shaft. The lower surface of the upper mold base (2) is provided with a second mounting groove (11). Both the mounting bracket (10) and the second mounting groove (11) are provided with threaded assemblies. A concave mold core (12) is fixedly mounted on the mounting bracket (10) via a bolt assembly. A convex mold core (13) is fixedly mounted in the second mounting groove (11) via a bolt assembly. The mounting bracket (10) has a fixing groove (14), and a telescopic rod (15) is fixedly installed in the fixing groove (14). The upper end of the telescopic rod (15) is rotatably connected to the lower surface of the upper mold base (2) through a rotating shaft.

2. The stamping apparatus for aerospace aluminum alloy forgings according to claim 1, characterized in that: The drive assembly includes a mounting cavity (16), which is located inside the lower mold base (1). A dual-head servo motor (17) is fixedly installed inside the mounting cavity (16). Both output ends of the dual-head servo motor (17) are fixedly connected to drive rods (18) via couplings. A first bevel gear (19) is fixedly sleeved on the rod wall of each of the two drive rods (18). The lower ends of the two lead screws (3) extend through into the mounting cavity (16), and the lower ends of the two lead screws (3) located in the mounting cavity (16) are fixedly connected to a second bevel gear (20). The two first bevel gears (19) are respectively meshed with the corresponding second bevel gears (20).

3. The stamping apparatus for aerospace aluminum alloy forgings according to claim 2, characterized in that: The end of the drive rod (18) away from the dual-head servo motor (17) is rotatably connected to the two side walls of the mounting cavity (16) via bearings.

4. The stamping apparatus for aerospace aluminum alloy forgings according to claim 1, characterized in that: The cylinder assembly includes a drive cylinder (24) and a piston rod (25). The drive cylinder (24) is fixedly installed on the groove wall of the T-shaped slide (4), and the output end of the drive cylinder (24) is movably connected to the piston rod (25). The end of the piston rod (25) is fixedly connected to the T-shaped slider (5).

5. The stamping apparatus for aerospace aluminum alloy forgings according to claim 1, characterized in that: The drive cylinder (24) and piston rod (25) are both arranged horizontally and are parallel to the T-shaped slide groove (4) and T-shaped slider (5).

6. The stamping apparatus for aerospace aluminum alloy forgings according to claim 1, characterized in that: The bolt assembly includes two sets of threaded grooves (21) and two sets of threaded holes (22). One set of threaded grooves (21) is opened on the outer side wall of the mounting bracket (10), and the other set of threaded grooves (21) is opened on the upper surface of the punch core (13). One set of threaded holes (22) is opened through the lower end of the die core (12), and the other set of threaded holes (22) is opened on the top wall of the second mounting groove (11) and penetrates the upper surface of the upper mold base (2). The two sets of threaded grooves (21) are respectively threadedly connected to the corresponding threaded holes (22) with mounting bolts (23).

7. The stamping apparatus for aerospace aluminum alloy forgings according to claim 1, characterized in that: The mounting bracket (10) is L-shaped, and the outer wall and lower surface of the concave mold core (12) are in contact with the mounting bracket (10). The upper surfaces of the mounting bracket (10) and the concave mold core (12) are flush with the upper surface of the lower mold base (1).

8. The stamping apparatus for aerospace aluminum alloy forgings according to claim 1, characterized in that: The fixing groove (14) and the telescopic rod (15) are both vertically arranged, and the pivot positions of the top of the fixing groove (14) and the telescopic rod (15) correspond to each other.

9. The stamping apparatus for aerospace aluminum alloy forgings according to claim 1, characterized in that: The side wall of the die core (12) is provided with an arc-shaped surface, and the arc-shaped surface is set with the rotating shaft on the mounting bracket (10) as the axis.

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