Composite stamping device and method

Abstract

The invention discloses a composite stamping device and method. Comprising an upper die plate (1) and a lower die plate (2), and an upper die core (3), a lower die core (4) and a fixing plate (5) are sequentially arranged between the upper die plate and the lower die plate from top to bottom; the lower end face of the upper die core (3) is a convex arc face, and the upper end face of the lower die core (4) is a concave arc face matched with the convex arc face. A punching punch (6) with the lower end protruding out of the convex arc face is arranged in the center of the convex arc face, a flanging ring groove (17) is formed in the convex arc face on the periphery of the outer circle face of the punching punch (6), and ribbing punching grooves (7) are distributed in the convex arc face on the periphery of the flanging ring groove (17) in the circumferential direction. A flanging via hole (8) is formed in the center of the concave arc surface, and ribbing via holes (9) are distributed in the concave arc surface around the flanging via hole (8) in the circumferential direction; a flanging bushing (10) is arranged in the center of the fixing plate (5), and ribbing punches (11) are distributed on the fixing plate (5) around the flanging bushing (10) in the circumferential direction; the flanging bushing (10) is connected with the flanging via hole (8) in a sliding manner; the ribbing punch (11) is connected with the ribbing through hole (9) in a sliding manner; the punching punch (6) and the flanging bushing (10) are coaxially arranged; and the ribbing punch (11) and the ribbing punching groove (7) are axially aligned along the flanging bushing (10). The combined machining device can meet batch production and has multiple functions of bending, ribbing, punching, hole flanging and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation mold processing, and in particular relates to a composite stamping device and method. Background Art

[0002] The mechanical aviation system structural parts include fuel tank shell parts with bending, rib punching and hole-flipping structures. Most of these parts are thin-walled parts with uniform thickness. They are affected by the assembly relationship and have certain requirements for dimensional accuracy. However, the overall processing system has poor rigidity and is prone to rebound deformation during the processing.

[0003] Traditional processing solutions mostly involve processing through multiple sets of equipment. Each set of equipment is responsible for processing parts in different states, and the processing standards are inconsistent, resulting in extremely high total investment costs for the equipment, long total processing cycle for parts, and unstable final state of parts. When mass production is carried out, traditional processing solutions can no longer meet product delivery requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a composite punching device and method. The present invention has high processing efficiency, stable and reliable processing quality, can meet the needs of batch production, and has multiple functions such as bending, rib pressing, punching, and punching.

[0005] The technical solution of the present invention is: a composite stamping device, comprising an upper mold plate and a lower mold plate, wherein an upper mold core, a lower mold core and a fixed plate are arranged in sequence from top to bottom between the upper and lower mold plates; the lower end surface of the upper mold core is a convex arc surface, and the upper end surface of the lower mold core is a concave arc surface fitting the convex arc surface; a punching punch with a lower end protruding from the convex arc surface is arranged at the center of the convex arc surface, a flanging ring groove is arranged on the convex arc surface around the outer cylindrical surface of the punching punch, and rib punching grooves are circumferentially distributed on the upper edge of the convex arc surface around the flanging ring groove; a flanging through hole is arranged at the center of the concave arc surface, and rib through holes are circumferentially distributed on the upper edge of the concave arc surface around the flanging through hole; a flanging bushing is arranged at the center of the fixed plate, and rib punches are circumferentially distributed on the upper edge of the fixed plate around the flanging bushing; the flanging bushing is slidably connected to the flanging through hole; the rib punch is slidably connected to the rib through hole; the punching punch is coaxially arranged with the flanging bushing; the rib punch and the rib punch groove are aligned axially along the flanging bushing.

[0006] The aforementioned composite stamping device also includes a top plate, to which a push rod is connected, and the push rod passes through the lower mold plate and the fixed plate in sequence and is connected to the lower mold core.

[0007] In the aforementioned composite punching device, an upper pad is also provided between the upper mold plate and the upper mold core.

[0008] In the aforementioned composite punching device, a lower pad is also provided between the lower template and the fixed plate.

[0009] In the aforementioned composite punching device, the upper and lower templates are guided by a guide assembly.

[0010] In the stamping method of the aforementioned composite stamping device, in the initial state, the upper die core and the lower die core are separated, and the embossing punch and the flanging bushing do not expose the concave arc surface; the upper die core moves downward, and the convex arc surface presses the stamping plate on the concave arc surface to complete the initial forming; the upper die core continues to move downward, pushing the concave arc surface downward, and the flanging bushing gradually exposes the concave arc surface, and the punching punch is aligned with the flanging bushing and punches down to form a punching hole on the stamping plate; the upper die core continues to move downward, pushing the concave arc surface to continue to move downward, and the embossing punch exposes the concave arc surface; at this time, the embossing punch cooperates with the embossing groove on the convex arc surface to form a embossing on the stamping plate, and synchronously, the flanging bushing extends into the flanging ring groove to flanging the stamping hole made on the stamping plate; the upper die core continues to move downward, and the lower die core moves downward to the lower limit position. At this time, the embossing and flanging are completed synchronously, and the pressure is continued to be maintained to shape the stamping plate.

[0011] In the stamping method of the aforementioned composite stamping device, during the stamping process, the top plate supports the lower die core through the ejector pin as required.

[0012] In the stamping method of the aforementioned composite stamping device, after shaping, the upper die core moves upward to separate from the lower die core, and the top plate pushes the lower die core upward through the push rod, pushing the stamping plate away from the flanging bushing and the embossing punch to complete demoulding.

[0013] The advantages of the present invention are as follows: the present invention uses one set of processing equipment to realize the functions of multiple sets of original processing equipment, reduces product processing costs, improves processing efficiency, and meets product delivery node requirements.

[0014] The convex and concave molds of the core components of the present invention have a unique design, which can not only realize the punching function, but also realize the hole turning function, and utilize the assembly relationship between the convex and concave molds and other components to solve the problem of insufficient strength and possible instability and fracture.

[0015] The present invention has a rigid unloading structure instead of an elastic unloading structure, thereby solving the problem that the elastic element is prone to failure and affects the use of the device, and ensuring the reliability of the device.

[0016] The present invention combines the final assembly requirements to realize step-by-step execution of operations during processing, realizes different processing requirements at different positions, and ensures the orderliness of the processing steps.

[0017] The present invention replaces the original multiple positioning functions with one positioning, thereby reducing the problem of unstable processing quality caused by positioning deviation in multiple processing.

[0018] The upper and lower molds of the present invention are provided with a sliding guide structure, which has precise guiding, and replaces the backward method of the original structure in which the blank is matched with the device for guiding.

[0019] The present invention has a rigid correction function, which can realize the rigid correction of the workpiece surface and prevent the workpiece from rebounding after processing.

[0020] The unloading device of the present invention realizes the function of automatic physical isolation of parts and waste materials, avoiding the need for operators to manually sort the products after processing.

[0021] The present invention optimizes the structure of the straight-line punch, reduces the difficulty of processing and assembling the straight-line punch, and reduces the processing cost of tooling and the difficulty of subsequent device maintenance.

[0022] The present invention optimizes the blank positioning structure, improves the blank positioning accuracy, and ensures the processing quality.

[0023] The invention has high processing efficiency, good precision control, stable and reliable quality, and good maintainability, and can meet the processing requirements of batch production of oil tank shells.

[0024] The processing efficiency of the present invention is improved from 30 minutes per part to 8 minutes per part, and the efficiency is improved by about 300%. The tooling investment cost is reduced from the original total of 60,000 yuan to a total of 20,000 yuan, and the tooling investment cost is reduced by about 67%. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an assembly diagram of the present invention;

[0026] Figure 2 It is an exploded view of the present invention;

[0027] Figure 3 Schematic diagram of the lower mold core;

[0028] Figure 4 It is another perspective schematic diagram of the present invention;

[0029] Figure 5 This is a bottom view of the upper mold core;

[0030] Figure 6 is a schematic diagram of a fixed plate;

[0031] Figure 7 This is a bottom view of the fixed plate;

[0032] Figure 8 This is a cross-sectional view of the fixed plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific settings and methods proposed below, but covers any improvements, replacements and modifications of structures, methods, devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity in the present invention.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can refer to and quote each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] Example 1. A composite punching device, see Figure 1-8 , including an upper mold plate 1 and a lower mold plate 2, an upper mold core 3, a lower mold core 4 and a fixing plate 5 are arranged between the upper and lower mold plates from top to bottom; the lower end surface of the upper mold core 3 is a convex arc surface, and the upper end surface of the lower mold core 4 is a concave arc surface that fits the convex arc surface; a punching punch 6 with a lower end protruding from the convex arc surface is arranged at the center of the convex arc surface, a flanged annular groove 17 is arranged on the convex arc surface around the outer circumferential surface of the punching punch 6, and rib punching grooves 7 are distributed along the circumferential direction on the convex arc surface around the flanged annular groove 17; a flanged overcut is arranged at the center of the concave arc surface Hole 8, and ribbed through holes 9 are distributed circumferentially on the concave arc surface around the flanged through hole 8; a flanged bushing 10 is provided in the center of the fixed plate 5, and ribbed punches 11 are distributed circumferentially on the fixed plate 5 around the flanged bushing 10; the flanged bushing 10 is slidably connected to the flanged through hole 8; the ribbed punch 11 is slidably connected to the ribbed through hole 9; the punching punch 6 is coaxially arranged with the flanged bushing 10; the ribbed punch 11 is aligned axially with the ribbed punch groove 7 along the flanged bushing 10.

[0037] The aforementioned composite stamping device further comprises a top plate 12 , to which a top rod 13 is connected. The top plate 12 passes through the lower mold plate 2 and the fixing plate 5 in sequence and is connected to the lower mold core 4 .

[0038] An upper pad 14 is also provided between the upper mold plate 1 and the upper mold core 3 .

[0039] A lower pad 15 is further provided between the lower template 2 and the fixed plate 5 .

[0040] The upper and lower templates are guided by a guide assembly 16.

[0041] The stamping method of the aforementioned composite stamping device: in the initial state, the upper die core 3 and the lower die core 4 are separated, and the embossing punch 11 and the flanging bushing 10 are not exposed to the concave arc surface; the upper die core 3 moves downward, and the convex arc surface presses the stamping plate on the concave arc surface to complete the initial forming; the upper die core 3 continues to move downward, pushing the concave arc surface downward, and the flanging bushing 10 gradually exposes the concave arc surface, and the punching punch 6 aligns with the flanging bushing 10 and punches down to make a punching hole on the stamping plate; the upper die core 3 continues to move downward, pushing the concave arc surface to continue to move downward, and the embossing punch 11 exposes the concave arc surface; at this time, the embossing punch 11 cooperates with the embossing groove 7 on the convex arc surface to make embossing on the stamping plate, and synchronously, the flanging bushing 10 extends into the flanging ring groove 17 to flanging the stamping hole made on the stamping plate; the upper die core 3 continues to move downward, and the lower die core 4 moves down to the lower limit position. At this time, the embossing and flanging are completed synchronously, and the pressure is continued to be maintained to shape the stamping plate.

[0042] During the stamping process, the top plate 12 supports the lower mold core 4 through the top rod 13 as needed.

[0043] After shaping, the upper die core 3 moves upward to separate from the lower die core 4, and the top plate 12 pushes the lower die core 4 upward through the push rod 13, pushing the stamping plate away from the flanging bushing 10 and the rib punch 11, completing demoulding. The top plate 12 is connected to the hydraulic machine tool top cylinder to provide support or power.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A composite punching device, characterized in that: The invention comprises an upper mold plate (1) and a lower mold plate (2), wherein an upper mold core (3), a lower mold core (4) and a fixing plate (5) are sequentially arranged between the upper and lower mold plates from top to bottom; the lower end surface of the upper mold core (3) is a convex arc surface, and the upper end surface of the lower mold core (4) is a concave arc surface that fits the convex arc surface; a punching punch (6) with a lower end protruding from the convex arc surface is arranged at the center of the convex arc surface, a flanged annular groove (17) is arranged on the convex arc surface around the outer circumferential surface of the punching punch (6), and rib punching grooves (7) are distributed in the circumferential direction on the convex arc surface around the flanged annular groove (17); a flanged through hole (8) is arranged at the center of the concave arc surface, A ribbed through hole (9) is distributed circumferentially on the concave arc surface around the flanged through hole (8); a flanged bushing (10) is provided at the center of the fixed plate (5), and a ribbed punch (11) is distributed circumferentially on the fixed plate (5) around the flanged bushing (10); the flanged bushing (10) is slidably connected to the flanged through hole (8); the ribbed punch (11) is slidably connected to the ribbed through hole (9); the punching punch (6) is coaxially arranged with the flanged bushing (10); the ribbed punch (11) and the ribbed punch groove (7) are aligned axially along the flanged bushing (10).

2. The composite punching device according to claim 1, characterized in that: It also includes a top plate (12), to which a top rod (13) is connected, and the top rod (13) passes through the lower mold plate (2) and the fixing plate (5) in sequence to be connected to the lower mold core (4).

3. The composite punching device according to claim 1, characterized in that: An upper pad (14) is also provided between the upper mold plate (1) and the upper mold core (3).

4. The composite punching device according to claim 1, characterized in that: A lower pad (15) is also provided between the lower template (2) and the fixed plate (5).

5. The composite punching device according to claim 1, characterized in that: The upper and lower templates are guided by a guide assembly (16).

6. A stamping method of a composite stamping device according to any one of claims 1 to 5, characterized in that: In the initial state, the upper die core (3) and the lower die core (4) are separated, and the rib punch (11) and the flange bushing (10) are not exposed on the concave arc surface; the upper die core (3) moves downward, and the convex arc surface presses the stamping plate on the concave arc surface to complete the initial forming; the upper die core (3) continues to move downward, pushing the concave arc surface downward, and the flange bushing (10) gradually exposes the concave arc surface, and the punching punch (6) is aligned with the flange bushing (10) and punches downward to make a punching hole on the stamping plate; the upper die core (3) The concave arc surface is further moved downward, and the embossing punch (11) exposes the concave arc surface; at this time, the embossing punch (11) cooperates with the embossing groove (7) on the convex arc surface to form embossing on the stamping plate, and synchronously, the flanging bushing (10) extends into the flanging ring groove (17) to flanging the punching hole formed on the stamping plate; the upper die core (3) continues to move downward, and the lower die core (4) moves downward to the lower limit position, at this time, the embossing and flanging are completed synchronously, and the pressure is continued to be maintained to shape the stamping plate.

7. The punching method of the composite punching device according to claim 6, characterized in that: During the stamping process, the top plate (12) supports the lower die core (4) through the top rod (13) as required.

8. The punching method of the composite punching device according to claim 6, characterized in that: After shaping, the upper die core (3) moves upward to separate from the lower die core (4), and the top plate (12) pushes the lower die core (4) upward through the push rod (13), pushing the stamping plate away from the flanging bushing (10) and the rib punch (11), thereby completing demoulding.

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