Aluminum alloy punching machine tool for aerospace

Abstract

The invention relates to the technical field of aluminum alloy for aerospace, and discloses an aluminum alloy punching machine for aerospace, which is characterized in that liquid outlet structures are respectively arranged on the inner wall of a female die and the outer wall of a male die, the bottom of a piston pump is communicated with two one-way valves, one one-way valve is used for controlling liquid discharge, the one-way valve is horizontally arranged, and the other one-way valve is used for controlling liquid discharge. According to the device, the piston pump drives the fluorine coating containing the nano ceramic particles to be directly sprayed to an aluminum alloy forming part from liquid outlets in the female die and the male die, so that the aluminum alloy forming part can be formed, and the aluminum alloy forming part can be formed through the liquid outlets in the female die and the male die; and the fluorine coating is more uniformly covered, so that waste and covering dead angles of external spraying are avoided, meanwhile, the process of spraying the aluminum alloy from the outside is omitted, the machining process of the aluminum alloy is further simplified, and the stamping efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of aluminum alloy equipment for aerospace, and particularly relates to an aluminum alloy stamping machine for aerospace. BACKGROUND

[0002] Aluminum alloy components for aerospace are required to have high surface quality and forming precision, and direct friction between the aluminum alloy and a die in a stamping forming process can easily cause surface scratches and die sticking, so that the component quality needs to be improved through lubrication protection.

[0003] A traditional stamping machine adopts a manual spraying lubricating liquid mode, and after the front and back surfaces of the aluminum alloy component are sprayed with the lubricating liquid protective liquid, stamping is performed. In this process, the aluminum alloy component needs to be subjected to temperature treatment after being sprayed, so as to form a protective film on the aluminum alloy component. This process includes two procedures, is time-consuming and labor-consuming, and is slow in stamping efficiency of the aluminum alloy. In addition, the protective film is damaged in the process of transferring and placing the aluminum alloy plate in the die. SUMMARY

[0004] The application aims to provide an aluminum alloy stamping machine for aerospace to solve the problems in the background technology.

[0005] To solve the above technical problems, the application is implemented by the following technical scheme: The application is an aluminum alloy stamping machine for aerospace, which comprises a machine frame and a hydraulic cylinder. The hydraulic cylinder is installed at the top of the machine frame. The output end of the hydraulic cylinder is connected with a lifting load plate. Four corners of the lifting load plate are respectively connected with piston pumps. The output end of the hydraulic cylinder drives the lifting load plate and the piston pumps to perform lifting operation. The bottom of the lifting load plate and the bottom of the machine frame are respectively provided with sliding grooves. A female die is slidably connected to the sliding groove of the lifting load plate. A male die is slidably connected to the sliding groove of the machine frame. The machine frame is provided with a demolding mechanism for demolding the aluminum alloy. The inner wall of the female die and the outer wall of the male die are respectively provided with liquid outlet structures. The bottom of the piston pump is connected with two one-way valves. One of the one-way valves is used to control the discharge of liquid and is horizontally arranged. The female die is connected with the horizontally arranged one-way valve through the lifting load plate and a hose. The male die is connected with the horizontally arranged one-way valve through the bottom of the machine frame. The other one-way valve is used to control the inflow of liquid and is vertically arranged.

[0006] Further, the inner part of the female die is provided with a hollow structure, the liquid outlet structure of the female die is provided with a plurality of liquid outlets, the liquid outlets are communicated with the hollow structure of the female die, and the two ends of the female die are provided with protrusions. Further, the outer wall of the female die is provided with a heating sheet. Further, the two ends of the male die are provided with protrusions, the two end protrusions of the male die are provided with male die communication openings, the inner part of the male die is provided with a channel, the male die communication openings are communicated with the channel, the top of the male die is provided with a hollow structure, the inner side of the top of the male die is provided with a heating sheet, a gap is left between the heating sheet and the inner wall of the male die, the gap is communicated with the channel, and the liquid outlet structure of the male die is provided with a plurality of male die liquid outlets. Further, the inner parts of the lifting carrier plate and the rack are respectively provided with limiting communication structures, and the two groups of limiting communication structures are respectively used for limiting and simultaneously communicating the female die and the male die.

[0007] Further, the limiting communication structure comprises a limiting communication block and a second spring, the bottoms of the lifting carrier plate and the rack are respectively provided with mounting grooves, the limiting communication block is slidingly connected to the inner wall of the mounting groove, the second spring is mounted in the mounting groove, the middle part of the limiting communication block is provided with a through hole, one end of the mounting groove is used for communicating with the female die and the male die, the other end of the mounting groove is communicated with a hose, and the mounting groove is communicated with the one-way valve through the hose.

[0008] Further, the edges of the two end protrusions of the female die and the male die are respectively provided with round corners, and the one end of the limiting communication block close to the female die and the male die is provided with a round corner.

[0009] Further, the piston pump comprises a piston rod and a pump pipe, the pump pipe is fixedly connected to the bottom of the rack, the pump pipe is respectively communicated with two one-way valves, the piston rod is slidingly connected to the inner part of the pump pipe, and the bottom of the pump pipe is fixedly connected with a piston.

[0010] Further, the pump pipe and the two one-way valves form a T-shaped structure, the ports of the two one-way valves are respectively communicated with hoses, and the hoses are respectively used for sucking and discharging liquid.

[0011] Further, the demolding mechanism comprises a ring-shaped frame, a connecting rod and a first spring, a plurality of connecting rods are fixedly connected to the bottom outer wall of the ring-shaped frame, the connecting rod is slidingly connected to the bottom of the rack, and the first spring is connected between the lower surface of the ring-shaped frame and the bottom surface of the rack.

[0012] The present application has the following advantages: (1) The present application drives fluorine coating containing nano ceramic particles by a piston pump, and sprays the fluorine coating from the liquid outlet inside the concave die and convex die directly to the aluminum alloy forming part, so that the fluorine coating is more evenly covered, the waste and dead angle of external spraying are avoided, the process of external spraying on the aluminum alloy is saved, the processing process of the aluminum alloy is further simplified, the stamping efficiency is improved, and the temperature can be controlled by cooperating with the concave die heating sheet and the convex die heating sheet. In the process of stamping the aluminum alloy, the volatilization of the fluorine coating solvent is accelerated, so that the solid component quickly forms a dense protective film covering the surface of the aluminum alloy. Compared with the prior art, the damage caused by the film after the aluminum alloy stamping is reduced.

[0013] (2) The limiting communication block of the limiting communication structure cooperates with the second spring, so that the concave die and the convex die can be automatically clamped and limited after adjustment or replacement along the sliding groove. The through hole realizes the rapid communication of the fluorine coating passage, and the mold replacement adjustment time is relatively short compared with the traditional machine tool. The round corner design avoids the jamming of the mold and the limiting block, further improves the smoothness of mold replacement, and meets the rapid stamping demand of multi-specification aerospace aluminum alloy components. Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the rack structure of the present application; Figure 3 It is a schematic diagram of the internal structure of the one-way valve of the present application; Figure 4 It is a schematic diagram of the structure of the present application Figure 3 at A; Figure 5 It is a schematic diagram of the structure of the piston pump and the one-way valve of the present application; Figure 6 It is a schematic diagram of the demolding mechanism of the present application; Figure 7 It is a schematic diagram of the structure of the convex die and the concave die of the present application; Figure 8 It is a schematic diagram of the internal structure of the convex die and the concave die of the present application; Figure 9 The structure diagram at B in the present application Figure 8 Figure 10 The internal schematic diagram of the limit communication structure in the present application Figure 11 The structure diagram at C in the present application Figure 10 Figure 12 The structure schematic diagram of the piston pump, hydraulic cylinder and lifting load plate in the present application

[0016] In the drawings, the components represented by each reference numeral are listed as follows: In the drawings, 1 is a machine frame, 2 is a hydraulic cylinder, 3 is a piston pump, 31 is a piston rod, 32 is a pump pipe, 4 is a demolding mechanism, 41 is a ring frame, 42 is a connecting rod, 43 is a first spring, 5 is a one-way valve, 6 is a lifting load plate, 7 is a concave die, 71 is a concave die communication port, 72 is a concave die liquid outlet, 8 is a heating sheet, 9 is a convex die, 91 is a convex die communication port, 92 is a convex die liquid outlet, 93 is a channel, 10 is a heating block, 11 is a limit communication block, and 12 is a second spring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] The present application is an aluminum alloy stamping machine for aerospace, as shown in Figure 1 Figure 12 The present application is an aluminum alloy stamping machine for aerospace, as shown in The bottom of the lifting load plate 6 and the bottom of the machine frame 1 are respectively provided with sliding grooves, the concave die 7 is slidingly connected to the sliding groove of the lifting load plate 6, and the convex die 9 is slidingly connected to the sliding groove of the machine frame 1. The machine frame 1 is provided with a demolding mechanism 4 for demolding of aluminum alloy. The inner wall of the concave die 7 and the outer wall of the convex die 9 are respectively provided with liquid outlet structures for discharging protective paint, such as fluorine paint. After the solvent volatilizes, the solid components form a film, which protects the surface of the aluminum alloy during stamping. ​​​The bottom of the piston pump 3 is communicated with two one-way valves 5, one of which is used to control the liquid discharge, and the other is used to control the liquid inflow. The one-way valve 5 for controlling the liquid discharge is horizontally arranged, and the recessed die 7 is communicated with the horizontally arranged one-way valve 5 through the lifting carrier plate 6 and the hose.

[0019] The inside of the recessed die 7 is hollow for the liquid flow, and the liquid outlet structure of the recessed die 7 is provided with a plurality of recessed die liquid outlets 72 for discharging the liquid, which are communicated with the hollow structure of the recessed die 7. The purpose of this arrangement is that the fluorine coating enters the inside of the recessed die 7, and the liquid is pushed out by the air pressure generated by the downward operation of the piston pump 3 through the plurality of recessed die liquid outlets 72 to cover the aluminum alloy forming part. The heating sheet 8 is installed on the outer wall of the recessed die 7 to accelerate the volatilization of the fluorine coating discharged by the recessed die 7. The two ends of the convex die 9 are provided with protrusions to keep sliding stable on the bottom of the rack 1, and the protrusions at the two ends of the convex die 9 are provided with convex die communication ports 91. The purpose of this arrangement is that the fluorine coating enters the inside of the convex die 9, and the liquid is pushed out by the air pressure generated by the downward operation of the piston pump 3 through the plurality of convex die liquid outlets 92 to cover the aluminum alloy forming part, which cooperates with the recessed die liquid outlets 72 to coat the aluminum alloy forming part, thereby reducing the abrasion of the surface of the aluminum alloy during the stamping forming of the aluminum alloy. The inside of the lifting carrier plate 6 and the rack 1 is respectively provided with a limiting communication structure, and the two sets of limiting communication structures are respectively used to limit and communicate the recessed die 7 and the convex die 9.

[0020] The limiting communication structure comprises a limiting communication block 11 and a second spring 12, and the lifting carrier plate 6 and the bottom of the rack 1 are respectively provided with a mounting groove, the limiting communication block 11 is slidingly connected to the inner wall of the mounting groove, and the second spring 12 is mounted in the mounting groove; a through hole is arranged in the middle of the limiting communication block 11, one end of the mounting groove is used for communication with the concave die 7 and the convex die 9, the other end of the mounting groove is communicated with the hose, and the mounting groove is communicated with the one-way valve 5 through the hose; The purpose of such an arrangement is that after the concave die 7 and the convex die 9 are slidingly installed along the sliding groove, the limiting communication block 11 is clamped into the convex die liquid outlet 92 or the concave die liquid outlet 72 to be limited and fixed under the tension of the second spring 12, and such an arrangement is used for subsequent replacement of the concave die 7 and the convex die 9, and then the limiting communication block 11 is communicated with the one-way valve 5 through the through hole, the mounting groove and the hose.

[0021] The two ends of the concave die 7 and the convex die 9 are respectively provided with a rounded corner, and the one end of the limiting communication block 11 close to the concave die 7 and the convex die 9 is provided with a rounded corner; The purpose of such an arrangement is that when the concave die 7 and the convex die 9 are pushed or pulled, the concave die 7 and the convex die 9 can push away the limiting communication block 11, so as to release the limiting.

[0022] The piston pump 3 comprises a piston rod 31 and a pump pipe 32, the pump pipe 32 is fixedly connected to the bottom of the rack 1, the pump pipe 32 is communicated with two one-way valves 5, the piston rod 31 is slidingly connected to the inside of the pump pipe 32, and the bottom of the pump pipe 32 is fixedly connected with a piston, and the piston is slidingly connected to the inner wall of the pump pipe 32; The purpose of such an arrangement is that in combination Figure 12 As shown in the figure, when the lifting carrier plate 6 is pushed to move at the output end of the hydraulic cylinder 2, the lifting carrier plate 6 drives the piston rod 31 to move downward, and when the piston rod 31 moves downward, the fluorine coating in the pump pipe 32 is pushed out through the horizontal one-way valve 5. When the piston rod 31 moves upward, the external liquid is sucked into the inside of the pump pipe 32 through the hose by the vertical one-way valve 5 under the action of negative pressure.

[0023] The pump pipe 32 and the two one-way valves 5 form a T-shaped structure, and the ports of the two one-way valves 5 are respectively communicated with the hoses, and are respectively used for sucking and discharging the liquid; The purpose of such an arrangement is that only when the piston rod 31 moves upward or downward in the pump pipe 32, the two one-way valves 5 are used for sucking and discharging the liquid, the structure is integrated, the cost is low, and the functions of sucking and discharging are realized.

[0024] The demolding mechanism 4 comprises an annular frame 41, connecting rods 42 and a first spring 43, a plurality of connecting rods 42 are fixedly connected to the outer wall of the bottom of the annular frame 41, the connecting rods 42 are slidingly connected to the bottom of the rack 1, and the first spring 43 is connected between the lower surface of the annular frame 41 and the bottom surface of the rack 1; The purpose of such arrangement is that after the aluminum alloy plate is formed, when the lifting carrier plate 6 and the concave die 7 move away from the aluminum alloy plate, the first spring 43 will be tensioned to support the aluminum alloy, the annular frame 41 and the connecting rods 42 upward, so as to make the aluminum alloy plate move away from the convex die 9 to achieve demolding.

[0025] Working principle: in the initial state, the output shaft of the hydraulic cylinder 2 drives the lifting carrier plate 6 to be in the high position, the piston rod 31 moves upward with the lifting carrier plate 6, a negative pressure is formed in the pump pipe 32, the vertically arranged one-way valve 5 is opened, and the high-temperature fluorine coating containing nanometer ceramic particles is sucked into the pump pipe 32 through the hose, and the fluorine coating storage is completed.

[0026] Combining Figure 4 As shown, the hydraulic cylinder 2 is started to drive the lifting carrier plate 6 to press down, the lifting carrier plate 6 drives the concave die 7 to move towards the convex die 9, at the same time, the piston rod 31 moves downward with the lifting carrier plate 6, and the fluorine coating in the pump pipe 32 is extruded, the vertical one-way valve 5 is closed, and the horizontal one-way valve 5 is opened, the fluorine coating enters the hollow structure of the concave die 7 and the channel 93 of the convex die 9 through the through hole of the limiting communication block 11 respectively; The one-way valve 5 comprises a valve body, a valve body spring and a valve core, the valve core is slidingly connected to the inner wall of the valve body, one port of the valve body is closed, a gap is left between the valve core and the valve body for the fluorine coating to flow through the gap between the valve core and the valve body, and the valve body spring is used for resetting the valve core. In this embodiment, it is only one kind of one-way valve 5, and other types of one-way valves 5 known in the art can be used, and the one-way valve 5 can be opened and closed during the operation of the piston rod 31.

[0027] The fluorine coating in the concave die 7 is sprayed to the contact area between the aluminum alloy plate and the concave die 7 through the concave die outlet 72, the fluorine coating in the convex die 9 enters the hollow structure of the convex die 9 through the channel 93 and the gap between the heating sheet 8 and the inner wall of the convex die 9, and then is sprayed to the contact area between the aluminum alloy plate and the convex die 9 through the convex die outlet 92, so that the formed part of the aluminum alloy is fully and uniformly coated.

[0028] During or after the fluorine coating spraying process, the heating sheet 8 on the outer wall of the concave die 7 and the heating block 10 on the top of the convex die 9 are started, the heating sheet 8 heats the whole concave die 7, and the heating sheet 8 heats the stamping area of the convex die 9, so that the temperature of the mold is controlled to 80-150 DEG C, which is suitable for the film forming requirement of the fluorine coating.

[0029] The heat is quickly transferred to the fluorine coating on the surface of the aluminum alloy plate, the solvent is volatilized, the nano ceramic particles in the fluorine coating are quickly coagulated, and a dense and uniform protective film is formed on the surface of the aluminum alloy plate, which provides protection for subsequent stamping forming and avoids scratches and wear caused by direct friction between the aluminum alloy plate and the mold.

[0030] The hydraulic cylinder 2 drives the lifting carrier plate 6 to press down, and the concave die 7 cooperates with the convex die 9 to stamp and form the aluminum alloy plate. In this process, the limiting communication block 11 is clamped into the convex position of the concave die 7 and the convex die 9 under the tension of the second spring 12, limiting the mold, preventing the mold from shifting during stamping, and ensuring the continuous communication and no leakage of the fluorine coating passage.

[0031] If the mold needs to be replaced to adapt to different specifications of components, the concave die 7 and the convex die 9 only need to be pushed or pulled along the sliding groove. The rounded corners of the mold convex will push away the limiting communication block 11. After the limiting is released, it can be quickly replaced. After the new mold is in place, the limiting communication block 11 is automatically reset and clamped under the action of the second spring 12, and the fluorine coating passage is connected without additional operation.

[0032] After stamping and forming is completed, the hydraulic cylinder 2 drives the lifting carrier plate 6 to move up and reset, and the concave die 7 moves away from the aluminum alloy plate with the lifting carrier plate 6. At this time, the first spring 43 is elastically reset, pushing the annular frame 41 to move up. The annular frame 41 drives several connecting rods 42 to move up along the bottom of the rack 1 synchronously, and the annular frame 41 uniformly lifts the aluminum alloy plate on the convex die 9, so that it is separated from the convex die 9, realizing demolding.

[0033] After demolding is completed, the piston rod 31 moves up with the lifting carrier plate 6, and the pump pipe 32 again sucks the fluorine coating, waiting for the next stamping cycle.

[0034] The preferred embodiments disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and do not limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and their entire scope and equivalents.

Claims

1. An aerospace aluminum alloy press machine tool comprising a frame (1) and a hydraulic cylinder (2), characterized in that: The hydraulic cylinder (2) is installed on the top of the frame (1), the output end bottom of the hydraulic cylinder (2) is connected with the lifting load plate (6), four corners of the lifting load plate (6) are respectively connected with the piston pump (3), the output end of the hydraulic cylinder (2) drives the lifting load plate (6) and the piston pump (3) to carry out lifting operation; The bottom of the lifting load plate (6) and the bottom of the frame (1) are respectively provided with sliding grooves, the sliding groove of the lifting load plate (6) is slidably connected with the female die (7), the sliding groove of the frame (1) is slidably connected with the male die (9), and the frame (1) is provided with a demolding mechanism (4) for demolding of aluminum alloy; The inner wall of the female die (7) and the outer wall of the male die (9) are respectively provided with liquid outlet structures; The bottom of the piston pump (3) is communicated with two one-way valves (5), one of the one-way valves (5) is used for controlling liquid discharge, the one-way valve (5) is horizontally arranged, the female die (7) is communicated with the horizontally arranged one-way valve (5) through the lifting load plate (6) through the hose, and the male die (9) is communicated with the horizontally arranged one-way valve (5) through the bottom of the frame (1); The other one-way valve (5) is used for controlling liquid inflow, and the one-way valve (5) is vertically arranged.

2. An aerospace aluminum alloy press machine tool according to claim 1, characterized in that: The inside of the female die (7) is provided as a hollow structure, the liquid outlet structure of the female die (7) is provided as a plurality of female die liquid outlets (72), the female die liquid outlets (72) are communicated with the hollow structure of the female die (7), the two ends of the female die (7) are provided with protrusions, the protrusions of the female die (7) slide along the sliding groove of the lifting load plate (6), the two end protrusions of the female die (7) are respectively provided with female die communication openings (71), and the female die communication openings (71) are communicated with the hollow structure of the female die (7).

3. An aerospace aluminum alloy press machine tool according to claim 2, characterized in that: The outer wall of the female die (7) is provided with a heating sheet (8).

4. An aerospace aluminum alloy press machine tool according to claim 3, characterized in that: The two ends of the male die (9) are provided with protrusions, the two end protrusions of the male die (9) are provided with male die communication openings (91), the inside of the male die (9) is provided with a channel (93), the male die communication openings (91) are communicated with the channel (93), the top of the male die (9) is provided as a hollow structure, a heating block (10) is arranged on the inner side of the top of the male die (9), a gap is formed between the heating block (10) and the inner wall of the male die (9), the gap is communicated with the channel (93), and the liquid outlet structure of the male die (9) is provided as a plurality of male die liquid outlets (92).

5. An aerospace aluminum alloy press machine tool according to claim 4, characterized in that: The inside of the lifting load plate (6) and the frame (1) is respectively provided with a limiting communication structure, and the two groups of limiting communication structures are respectively used for limiting and communicating the female die (7) and the male die (9).

6. An aerospace aluminum alloy press machine tool according to claim 5, characterized in that: The limiting communication structure comprises a limiting communication block (11) and a second spring (12), the lifting carrier plate (6) and the bottom of the rack (1) are respectively provided with a mounting groove, the limiting communication block (11) is slidingly connected to the inner wall of the mounting groove, the second spring (12) is mounted in the mounting groove, the middle part of the limiting communication block (11) is provided with a through hole, one end of the mounting groove is used for communicating with the concave die (7) and the convex die (9), the other end of the mounting groove communicates with the hose, and the mounting groove communicates with the one-way valve (5) through the hose.

7. An aerospace aluminum alloy press machine tool according to claim 6, characterized in that: The two ends of the concave die (7) and the convex die (9) are respectively provided with a rounded corner, and the one end of the limiting communication block (11) close to the concave die (7) and the convex die (9) is provided with a rounded corner.

8. An aerospace aluminum alloy press machine tool according to claim 7, characterized in that: The piston pump (3) comprises a piston rod (31) and a pump pipe (32), the pump pipe (32) is fixedly connected to the bottom of the rack (1), the pump pipe (32) communicates with two one-way valves (5) respectively, the piston rod (31) is slidingly connected in the pump pipe (32), and the bottom of the pump pipe (32) is fixedly connected with a piston.

9. An aerospace aluminum alloy press machine tool according to claim 8, characterized in that: The pump pipe (32) and the two one-way valves (5) form a T-shaped structure, the ports of the two one-way valves (5) are respectively communicated with a hose, and are respectively used for sucking and discharging liquid.

10. An aerospace aluminum alloy press machine tool according to claim 1, characterized in that: The demolding mechanism (4) comprises an annular frame (41), a connecting rod (42) and a first spring (43), a plurality of connecting rods (42) are fixedly connected to the bottom outer wall of the annular frame (41), the connecting rod (42) is slidingly connected to the bottom of the rack (1), and the first spring (43) is connected between the lower surface of the annular frame (41) and the bottom surface of the rack (1).

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