A leaf stamping die

Abstract

An embodiment of the present invention discloses a blade stamping die, which includes an upper template and a lower template. Among them, a female die capable of cooperating with a male die is installed on the lower template. A notch is provided on the female die. One end and both side walls of the notch are inclined upward to form slopes, and one end of the bottom of the notch is smoothly inclined upward to the other end until it is flush with the surface of the female die. It also includes a crowbar and a three-axis cylinder. The three-axis cylinder is fixedly installed on the surface of the lower template. One end of the three-axis cylinder is fixedly connected to the crowbar through a connecting rod, and one end of the crowbar is aligned with one end of the notch. In the present invention, one end and both side walls of the notch are inclined upward to form slopes, and one end of the bottom of the notch is smoothly inclined upward to the other end until it is flush with the surface of the female die. With such a design, the unmanned aerial vehicle blade is easy to pry out after being formed in the female die; and under the pressing of the three-axis cylinder, it can also be directly taken out, realizing automation, which is very convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of UAV blade production, and particularly to a blade stamping die. Background Art

[0002] A UAV is an unpiloted aircraft controlled by a radio remote control device and a self - contained program control device. In fact, UAVs are a general term for unmanned aerial vehicles. From a technical perspective, they can be classified into: unmanned helicopters, unmanned fixed - wing aircraft, unmanned multi - rotor aircraft, unmanned airships, unmanned parafoil aircraft, etc. The applications of UAVs are extremely extensive and can usually be used in agricultural applications (spraying pesticides, monitoring pests and diseases, etc.), aerial photography and film production, logistics and distribution, security and patrol, power line inspection, environmental monitoring and protection, entertainment, disaster relief, observing wild animals, weather forecasting, etc. For the increasingly developed modern society, the uses of UAVs are extremely extensive.

[0003] In multi - rotor UAVs, the common number of blades is two or four. This design aims to balance efficiency, noise, and manufacturing cost. Each blade consists of a hub cap (central part) and the blade itself. The shape and inclination angle design of the blade directly affect the lift efficiency and stability of the propeller.

[0004] When the UAV blade is stamped and formed, due to the large angle of blade distortion and severe deformation, and it is tightly stuck with the lower die after deformation and is not easy to be removed. And the existing relatively strong blanking structure will make the die more complex and prone to indentation and surface scratches. For this reason, we propose a blade stamping die. Summary of the Invention

[0005] In view of this, the present invention provides a blade stamping die for solving the problem that the UAV blade in the prior art is not easy to be removed after being formed in the lower die.

[0006] A blade stamping die includes an upper template and a lower template. Among them, a punch is installed at the bottom of the upper template; a die that can cooperate with the punch is installed on the lower template. An indentation for UAV blade forming is provided on the die. One end and both side walls of the indentation slope upward to form slopes, and one end of the bottom of the indentation slopes smoothly upward to the other end until it is flush with the surface of the die.

[0007] It also includes a crowbar and a three - axis cylinder. The three - axis cylinder is fixedly installed on the surface of the lower template. One end of the three - axis cylinder is fixedly connected with the crowbar through a connecting rod. One end of the crowbar is aligned with one end of the indentation.

[0008] Preferably, one end of the above-mentioned crowbar is provided with a U-shaped head, one end of the U-shaped head is provided with a flat inclined surface, a jet head A is fixedly installed at the U-shaped center of the U-shaped head, an air duct communicating with the jet head A is arranged inside the crowbar, and a flexible air pipe is connected to the air duct.

[0009] Preferably, a jet head B is installed on the upper part of one end of the above-mentioned crowbar. The jet head B is also communicated with the flexible air pipe through an air duct. An air solenoid valve is connected to the flexible air pipe, and an inclined flat air outlet is arranged on the jet head B.

[0010] Preferably, a vibration motor is also installed on the above-mentioned crowbar.

[0011] Preferably, the above further includes a single-chip microcomputer controller. The three-axis cylinder, the air solenoid valve and the vibration motor are all controlled by the single-chip microcomputer controller. Among them, during use, the punching machine is also electrically connected to the single-chip microcomputer controller, and the punching action of the punching machine is controlled by the single-chip microcomputer controller.

[0012] Preferably, a limit block is fixedly installed on the above-mentioned lower template. The limit block is arranged in front of one end of the three-axis cylinder, and a proximity sensor is embedded on the side surface of the limit block opposite to one end of the three-axis cylinder. The signal output end of the proximity sensor is connected to the signal input end of the single-chip microcomputer controller.

[0013] Preferably, the above further includes an oil injection mechanism. The oil injection mechanism includes an electric injector and a switch magnetic base. The switch magnetic base is fixedly attracted and fixed on the surface of the lower template through magnetism. A rotary cylinder is fixedly installed on the top of the switch magnetic base. One end of the rotating shaft of the rotary cylinder is fixedly connected with a rigid oil injection pipe. An oil injection head is installed at one end of the oil injection pipe. The oil outlet of the electric injector is communicated with one end of the oil injection pipe through a hose. The electric injector and the rotary cylinder are respectively controlled by the single-chip microcomputer controller.

[0014] Preferably, two L-shaped hooks are fixedly connected to one side of the above-mentioned electric injector. Two grooves are opened at one end of the top surface of the lower template, and the two L-shaped hooks can be inserted into the two grooves.

[0015] Preferably, the above-mentioned electric injector includes an oil storage box. An oil pump is installed on the oil storage box. The outlet of the oil pump is communicated with one end of the hose. A supply port is opened at the top of one end of the oil storage box.

[0016] The present invention also provides a stamping forming process for an unmanned aerial vehicle blade. Using the above-mentioned blade stamping forming die, it specifically includes the following steps:

[0017] S1. Install the blade stamping die, connect the circuit system, and set the working air pressure range of the three-axis cylinder to 0.25 Mpa - 0.40 Mpa;

[0018] S2. Set the one-key start stamping button and connect it to the single-chip microcomputer controller;

[0019] S3. Prepare the blank, and place the blank in the notch of the female die;

[0020] S4. Press the one-key start stamping button, and automatically execute the following steps through the single-chip microcomputer controller;

[0021] S5. Start the electric fuel injector, and spray volatile punching oil on the upper surface of the blank in the notch for lubrication; then, start the rotary cylinder and rotate it 90°, so that the fuel injection pipe moves out above the female die;

[0022] S6. Start the stamping machine to press downwards to complete the stamping;

[0023] S7. After the stamping is completed, the rotary cylinder rotates back above the notch, and then the electric fuel injector starts to spray punching oil to cool and lubricate the stamped blank;

[0024] S8. Open the pneumatic solenoid valve and start the vibration motor, and then extend forward through the three-axis cylinder. Under the action of air flow impact and vibration, eject the stamped blank;

[0025] S9. If the three-axis cylinder cannot eject the blank in one extension and is blocked and stuck, the proximity sensor cannot receive the induction signal, that is, one end of the three-axis cylinder does not reach the position of the limit block; at this time, the single-chip microcomputer controller controls the three-axis cylinder to retract and then eject again to try to eject the blank. After multiple attempts, the success rate of ejecting the blank can be improved.

[0026] Implementing the embodiments of the present invention will have the following beneficial effects:

[0027] The above-mentioned blade stamping die is adopted;

[0028] Among them, one end and both side walls of the notch are inclined upwards to form slopes, and the bottom end of the notch is smoothly inclined upwards to the other end until it is flush with the surface of the female die. With such a design, the UAV blade is easy to pry out after being formed in the female die, and there are no indentations and scratches, and the die structure is simple;

[0029] Moreover, under the pressing of the three-axis cylinder, it can also be directly ejected, realizing automation and being very convenient;

[0030] At the same time, jet heads A and B are provided on the crowbar, which can utilize the airflow to blow. On the one hand, it blows the surface of the blank after stamping to accelerate heat dissipation. On the other hand, it uses the airflow to quickly blow into the gap between the blank and the female die. While facilitating heat dissipation in the female die, the airflow impact is likely to cause the blank after stamping to be ejected. At the same time, the airflow passing through the formed arc-shaped surface of the blank is also likely to cause air pressure imbalance on both sides of the blank. After the air pressure provides partial lift, it is convenient for the blank to be ejected.

[0031] A vibration motor is installed on the crowbar. Through the vibration motor, when the U-shaped head touches the blank, the vibration energy can be transmitted to the blank, facilitating the loosening of the blank.

[0032] Through the oil injection mechanism, it can play the roles of lubrication, heat dissipation, and assisting the loosening of the blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Among them:

[0035] Figure 1 It is a schematic structural diagram of a blade stamping die in an embodiment;

[0036] Figure 2 It is a schematic structural diagram of a lower template in an embodiment;

[0037] Figure 3 It is a schematic structural diagram of a crowbar in an embodiment;

[0038] Figure 4 It is a schematic structural diagram of a female die in an embodiment;

[0039] Figure 5 It is a schematic structural diagram of one end of jet head B in an embodiment;

[0040] Figure 6 It is a schematic structural diagram of assembling an oil injection mechanism on a lower template in an embodiment;

[0041] Figure 7 It is a schematic structural diagram of an oil injection mechanism in an embodiment.

[0042] Reference Signs:

[0043] 100, upper template; 101, punch; 200, lower template; 201, groove;

[0044] 300. Female die; 301. Notch; 302. Slope; 400. Three-axis cylinder; 401. Connecting rod;

[0045] 500. Limit block; 501. Proximity sensor;

[0046] 600. Crowbar; 601. U-shaped head; 602. Inclined plane; 603. Jet head A; 604. Jet head B; 605. Flexible hose; 606. Vibration motor; 607. Pneumatic solenoid valve; 608. Flat air outlet;

[0047] 700. Oil injection mechanism; 701. Switch magnet base; 702. Rotary cylinder; 703. Oil injection pipe; 704. Oil injection head; 800. Electric oil injector; 801. Oil storage box; 802. Refueling port; 803. L-shaped hook; 804. Hose; 805. Oil pump. Detailed implementation mode

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0049] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0050] In order to enable those skilled in the technical field to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings.

[0051] Embodiment 1

[0052] Please refer to Figure 1-7, A leaf stamping die, including an upper template 100 and a lower template 200. Among them, a punch 101 is installed at the bottom of the upper template 100; a die 300 that can cooperate with the punch 101 is installed on the lower template 200. A notch 301 for forming a drone blade is provided on the die 300. One end and both side walls of the notch 301 slope upward to form slopes 302, and the angle between the slope 302 and the vertical direction is set at 5° - 30°; and the bottom end of the notch 301 slopes smoothly upward to the other end until it is flush with the surface of the die 300.

[0053] Among them, it also includes a crowbar 600 and a three-axis cylinder 400. The three-axis cylinder 400 is fixedly installed on the surface of the lower template 200. One end of the three-axis cylinder 400 is fixedly connected to the crowbar 600 through a connecting rod 401, and one end of the crowbar 600 is aligned with one end of the notch 301.

[0054] Specifically, one end of the crowbar 600 is set as a U-shaped head 601. One end of the U-shaped head 601 is set as a flat inclined surface 602. A jet head A603 is fixedly installed at the U-shaped center of the U-shaped head 601. An air duct communicating with the jet head A603 is provided inside the crowbar 600, and a flexible air pipe 605 is connected to this air duct.

[0055] Among them, the jet direction of the jet head A603 is mainly between the bottom of the sheet and the bottom gap of the notch 301. In this way, under the action of blowing air, after the air flow enters, it will fill the notch 301, facilitating the loosening of the sheet after pressure forming.

[0056] During implementation, a jet head B604 is installed on the upper part of one end of the crowbar 600. The jet head B604 is also communicated with the flexible air pipe 605 through an air duct. An air solenoid valve 607 is connected to the flexible air pipe 605, and an inclined flat air outlet 608 is provided on the jet head B604.

[0057] The jet direction of the jet head B604 is mainly the upper surface of the sheet and is parallel to the arc surface of the sheet forming. On the one hand, it blows the upper surface of the sheet for heat dissipation. On the other hand, the fast air flow can cause negative pressure. The atmospheric pressure below the sheet is greater than the atmospheric pressure above, which can provide a lifting force for the sheet and facilitate demolding. It should be noted that the air flow speed of the jet head B604 needs to be greater than the air flow speed of the jet head A603. Therefore, the design of the flat air outlet 608 is very necessary. On the one hand, it keeps parallel to the upper surface of the blade after pressure forming as large as possible in area. On the other hand, it is to increase the blowing speed of the air flow.

[0058] During implementation, a vibration motor 606 is also installed on the crowbar 600. The design of the vibration motor 606 is even more icing on the cake. When it is stuck relatively tightly, the effect of loosening through vibration is very good.

[0059] Among them, it should be noted that it also includes a single-chip microcomputer controller (not shown in the figure). The three-axis cylinder 400, the pneumatic solenoid valve 607, and the vibration motor 606 are all controlled by the single-chip microcomputer controller. Among them, during use, the punching machine is also electrically connected to the single-chip microcomputer controller, and the punching action of the punching machine is controlled by the single-chip microcomputer controller. The design of the single-chip microcomputer controller facilitates the implementation of a series of automated operations.

[0060] During implementation, a limit block 500 is fixedly installed on the lower template 200. The limit block 500 is arranged in front of one end of the three-axis cylinder 400, and a proximity sensor 501 is embedded in the side surface of the limit block 500 opposite to one end of the three-axis cylinder 400. The signal output end of the proximity sensor 501 is connected to the signal input end of the single-chip microcomputer controller. The proximity sensor 501 can detect the position of one end of the three-axis cylinder 400 and confirm whether the three-axis cylinder 400 has normally completed the ejection work.

[0061] During implementation, it also includes an oil injection mechanism 700. The oil injection mechanism 700 includes an electric injector 800 and a switch magnetic base 701. The switch magnetic base 701 is fixedly attracted and fixed on the surface of the lower template 200 by magnetic force. A rotary cylinder 702 is fixedly installed on the top of the switch magnetic base 701. One end of the rotating shaft of the rotary cylinder 702 is fixedly connected to a rigid fuel injection pipe 703. An oil injection head 704 is installed at one end of the fuel injection pipe 703. The oil outlet of the electric injector 800 is communicated with one end of the fuel injection pipe 703 through a hose 804. The electric injector 800 and the rotary cylinder 702 are respectively controlled by the single-chip microcomputer controller. The electric injector 800 includes an oil storage box 801. A fuel pump 805 is installed on the oil storage box 801. The outlet of the fuel pump 805 is communicated with one end of the hose 804. A supply port 802 is opened at the top of one end of the oil storage box 801. Among them, the electric injector 800 is a prior art.

[0062] Among them, two L-shaped hooks 803 are fixedly connected to one side of the electric injector 800. Two grooves 201 are opened on one end of the top surface of the lower template 200. The two L-shaped hooks 803 can be inserted into the two grooves 201. With this design, the electric injector 800 can be directly placed on one side of the lower template 200, which is very convenient.

[0063] Embodiment 2

[0064] Different from Embodiment 1, this embodiment discloses a stamping and forming process for an unmanned aerial vehicle blade. Among them, the blade stamping and forming die mentioned in Embodiment 1 is adopted, and it specifically includes the following steps:

[0065] S1. Install the blade stamping and forming die, connect the circuit system well, and set the working air pressure range of the three-axis cylinder 400 to 0.25 Mpa - 0.40 Mpa;

[0066] S2. Set a one - key start stamping button and connect it to the single - chip microcomputer controller;

[0067] S3. Prepare the blank, and place the blank in the notch 301 of the female die 300;

[0068] S4. Press the one - key start stamping button, and automatically execute the following steps through the single - chip microcomputer controller;

[0069] S5. Start the electric fuel injector 800, and spray volatile punching oil on the upper surface of the blank in the notch 301 for lubrication; then, start the rotary cylinder 702 and rotate it by 90°, so that the fuel injection pipe 703 moves out of the directly above of the female die 300;

[0070] S6. Start the stamping machine to punch downwards to complete the stamping;

[0071] S7. After the stamping is completed, the rotary cylinder 702 rotates back above the notch 301, and then the electric fuel injector 800 starts to spray punching oil to cool and lubricate the stamped blank;

[0072] S8. Open the pneumatic solenoid valve 607, start the vibration motor 606, and then extend forward through the three - axis cylinder 400. Under the action of air flow impact and vibration, eject the stamped blank;

[0073] S9. If the three - axis cylinder 400 cannot eject the blank in one extension and is blocked and stuck, the proximity sensor 501 cannot receive the induction signal, that is, one end of the three - axis cylinder 400 does not reach the position of the limit block 500; at this time, the single - chip microcomputer controller controls the three - axis cylinder 400 to retract and then eject again, trying to eject the blank. By trying multiple times, the success rate of ejecting the blank can be improved.

[0074] The above steps are only the preliminary forming process of the stamping forming of the drone blade. In subsequent production, it also includes processes such as trimming, precision shaping, and drilling. The idea of the blade stamping forming die in Embodiment 1 can also be applied to the precision shaping die to facilitate material removal.

[0075] Obviously, the embodiments described above are only a part of the embodiments of this application, rather than all embodiments. The preferred embodiments of this application are given in the accompanying drawings, but do not limit the patent scope of this application. This application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of this application more thorough and comprehensive. Although this application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure made by using the content of the specification and drawings of this application, directly or indirectly applied in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A blade stamping die, characterized in that: include: An upper mold plate (100), wherein a convex mold (101) is installed at the bottom of the upper mold plate (100); A lower mold plate (200), wherein a concave mold (300) capable of cooperating with the convex mold (101) is mounted on the lower mold plate (200), and a notch (301) for forming a drone blade is provided on the concave mold (300), one end of the notch (301) and side walls on both sides are inclined upward to form a slope (302), and one end of the bottom of the notch (301) is smoothly inclined upward toward the other end until it is flush with the surface of the concave mold (300); It also includes a crowbar (600) and a three-axis cylinder (400), wherein the three-axis cylinder (400) is fixedly mounted on the surface of the lower template (200), one end of the three-axis cylinder (400) is fixedly connected to the crowbar (600) via a connecting rod (401), and one end of the crowbar (600) is aligned with one end of the notch (301); One end of the crowbar (600) is configured as a U-shaped head (601), one end of the U-shaped head (601) is configured as a flat inclined surface (602), a nozzle A (603) is fixedly installed at the center of the U-shape of the U-shaped head (601), an air passage communicating with the nozzle A (603) is provided inside the crowbar (600), and the air passage is connected to a soft air tube (605); The crowbar (600) is also equipped with a vibration motor (606); The working air pressure range of the three-axis cylinder (400) is 0.25MPa-0.40MPa; A spray head B (604) is installed on the upper part of one end of the crowbar (600), and the spray head B (604) is also connected to the soft air pipe (605) through the air channel. The soft air pipe (605) is connected to a gas solenoid valve (607). The spray head B (604) is provided with an inclined flat air outlet (608); The velocity of the air flow ejected from the nozzle B (604) is greater than the velocity of the air flow ejected from the nozzle A (603).

2. The blade stamping die according to claim 1, characterized in that: It also includes a single-chip microcomputer controller, and the three-axis cylinder (400), the gas solenoid valve (607) and the vibration motor (606) are all controlled by the single-chip microcomputer controller. When in use, the punching machine is also electrically connected to the single-chip microcomputer controller, and the punching action of the punching machine is controlled by the single-chip microcomputer controller.

3. The blade stamping die according to claim 2, characterized in that: A limit block (500) is fixedly mounted on the lower template (200), the limit block (500) being arranged in front of one end of the three-axis cylinder (400), and a proximity sensor (501) is embedded on the side of the limit block (500) opposite to one end of the three-axis cylinder (400), the signal output end of the proximity sensor (501) being connected to the signal input end of the single-chip controller.

4. The blade stamping die according to claim 3, characterized in that: The invention also comprises an oil injection mechanism (700), wherein the oil injection mechanism (700) comprises an electric oil injector (800) and a switch magnetic base (701), wherein the switch magnetic base (701) is fixed to the surface of the lower mold plate (200) by magnetic attraction, a rotary cylinder (702) is fixedly mounted on the top of the switch magnetic base (701), a hard oil injection pipe (703) is fixedly connected to one end of the rotating shaft of the rotary cylinder (702), an oil injection head (704) is mounted on one end of the oil injection pipe (703), an oil outlet of the electric oil injector (800) is connected to one end of the oil injection pipe (703) via a hose (804), and the electric oil injector (800) and the rotary cylinder (702) are respectively controlled by a single chip microcomputer controller.

5. The blade stamping die according to claim 4, characterized in that: Two L-shaped hooks (803) are fixedly connected to one side of the electric fuel injector (800), and two grooves (201) are provided on one end of the top surface of the lower template (200), and the two L-shaped hooks (803) can be inserted into the two grooves (201).

6. The blade stamping die according to claim 5, characterized in that: The electric fuel injector (800) comprises an oil storage box (801), an oil pump (805) is installed on the oil storage box (801), the outlet of the oil pump (805) is connected to one end of the hose (804), and a supply port (802) is opened at the top of one end of the oil storage box (801).

7. A stamping process for drone blades, characterized in that: The blade stamping die according to claim 6 is used, and specifically comprises the following steps: S1. Install the blade stamping die, connect the circuit system, and set the working air pressure range of the three-axis cylinder (400) to 0.25MPa-0.40MPa; S2, set a one-key start stamping button and connect it to the single-chip controller; S3, preparing a sheet, and placing the sheet in the notch (301) of the concave mold (300); S4, press the one-button start punching button, and the microcontroller controller automatically executes the following steps; S5, the electric oil injector (800) is started and the volatile punching oil is sprayed onto the upper surface of the sheet in the recess (301) for lubrication; then, the rotary cylinder (702) is started and rotated 90 degrees so that the oil injection pipe (703) is moved out of the upper part of the concave die (300); S6, the punching machine starts punching downward to complete the punching; S7, after the stamping is completed, the oil injection pipe (703) is rotated back to the top of the notch (301), and then the electric oil injector (800) starts to spray the punching and shearing oil to cool and lubricate the stamped sheet; S8, the air solenoid valve (607) is opened, the vibration motor (606) is started, and then the three-axis cylinder (400) is extended forward, and the stamped sheet is ejected under the action of airflow impact and vibration; if the three-axis cylinder (400) cannot eject the sheet in one extension and is blocked, the proximity sensor (501) cannot receive the sensing signal, that is, one end of the three-axis cylinder (400) has not reached the position of the limit block (500); at this time, the single-chip microcomputer controller controls the three-axis cylinder (400) to retract and then eject again to try to eject the sheet. Multiple attempts can increase the success rate of ejecting the sheet.

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