Wire filling device and method for sealing micropores on the surface of thin-walled hollow metal balls

Abstract

The present invention relates to a wire filling device and method for sealing micropores on the surface of thin-walled hollow metal spheres, and belongs to the field of material processing automation technology. The invention solves the problem of difficulty in filling welding wire into micropores. The invention comprises a welding nail conveying device, a welding nail filling device and a shell, on which the welding nail conveying device and the welding nail filling device are installed. The welding nail conveying device is located above the welding nail filling device. The welding nail conveying device is used to convey welding nails to the top of the welding nail filling device. The welding nail filling device is used to fill welding nails into the part to be welded. The present invention is used for the wire filling process of sealing micropores on the surface of thin-walled hollow metal spheres. It can complete the task of filling wire to seal micropores on the surface of thin-walled hollow metal spheres, reduce the difficulty of operation, accurately control the amount of filling wire, high wire filling efficiency and high degree of automation.

Description

Technical Field

[0001] The invention relates to a wire filling device and method, and belongs to the technical field of material processing automation. Background Art

[0002] In the fields of aerospace, military industry, etc., there is a demand for processing hollow thin-walled metal ball components, and it is necessary to inject specific liquids into the interior of such hollow balls to achieve functions. A tiny hole with a diameter of less than 1 mm is drilled on the surface of the ball, and the liquid is injected into the interior through the microhole. After the liquid is injected, the microhole is filled with welding wire and welded to seal it, so that the injected liquid is sealed inside the ball. Due to the small size of the microholes on the surface of the ball and the thin wall of the ball, welding methods with excessive heat input cannot be used for sealing. Therefore, laser spot welding with high instantaneous energy density and small range of action is usually used to seal the microholes on the surface of thin-walled hollow metal balls. However, there is currently no mature solution and device application for filling the microholes on the surface of the above-mentioned thin-walled hollow metal balls with welding wire.

[0003] The reason is that using laser spot welding to seal the micropores on the surface of the ball has extremely high requirements for the size and filling amount of the welding wire.

[0004] 1. Usually the selected welding wire diameter is 0.05mm smaller than the micropore diameter. If the welding wire diameter is too small, the welding wire will easily fall into the small ball through the micropore during filling; if the welding wire diameter is too large, it will not be able to fill into the micropore;

[0005] 2. The filler volume of welding wire is roughly 2mm-3mm. If the filler volume is too small, the impact force generated by the thermal expansion of the liquid inside the ball during welding can easily push the welding wire out of the micropore, causing the laser to directly act on the micropores on the surface of the ball, causing the thin-walled ball to be burned through. Alternatively, after the welding wire is successfully melted, the small filler volume may result in the area where the melted welding wire spreads not being able to completely cover the entire micropore, leaving some unsealed areas in the micropore.

[0006] 3. If the amount of welding wire is too large, the energy released by the laser during the welding process cannot melt the welding wire and the micropores cannot be sealed due to the extremely short laser welding time, usually within 0.5s. In this case, if the laser welding time is extended, the thin wall of the ball will be burned through by the laser due to heat accumulation.

[0007] 4. Due to the small size of the micropores on the surface of the ball, it is difficult to automatically fill the micropores with welding wire. The current production method is to manually fill the micropores with welding wire, which not only makes it difficult to accurately grasp the filling amount of welding wire, but also greatly reduces production efficiency.

[0008] Therefore, there is an urgent need to propose a wire filling device and method for sealing the micropores on the surface of thin-walled hollow metal balls to solve the above technical problems. Summary of the Invention

[0009] The present invention addresses the difficulty of filling microvias with welding wire. A brief overview of the invention is provided below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive overview of the invention. It is not intended to identify key or important aspects of the invention, nor is it intended to limit the scope of the invention.

[0010] The technical solution of the present invention:

[0011] A wire filling device for sealing micropores on the surface of thin-walled hollow metal balls includes a rivet conveying device, a rivet filling device and a shell. The rivet conveying device and the rivet filling device are installed on the shell. The rivet conveying device is located above the rivet filling device. The rivet conveying device is used to convey rivets to the top of the rivet filling device. The rivet filling device is used to fill rivets into the area to be welded.

[0012] Preferably, the welding nail conveying device includes a conveying wheel and a conveying belt. The two conveying belts are arranged in a mirror image. A conveying wheel is provided at each end of the conveying belt. The conveying belt is processed with a plurality of equidistantly arranged grooves. The conveying wheel is rotatably connected to the shell.

[0013] Preferably, the width of the groove is equal to the thickness of the nail cap of the welding nail.

[0014] Preferably: the welding nail filling device includes a welding nail filling rod, a welding nail support rod, a filling device support frame, a spring, a rope, a fixed pulley, an electric shaft bearing and a rotating electric shaft. A mirror-set fixed pulley is installed on the side of the shell, and a mirror-set filling device support frame is installed on the lower part of the shell. The filling device support frame has a cavity, and a spring is installed in the filling device support frame. One end of the welding nail support rod extends into the inner cavity and is slidably connected to the inner cavity. The two ends of the spring are respectively pressed against the inner side wall of the filling device support frame and the end face of the welding nail support rod. An electric shaft bearing is installed on the outside of the filling device support frame. The welding nail filling rod is connected to the electric shaft bearing through a rotating electric shaft. One end of the rope is connected to the middle of the welding nail filling rod, and the other end of the rope passes around the fixed pulley and is connected to the welding nail support rod.

[0015] Preferably, the welding nail filling device further comprises a rope traction ring, which is fixed to the middle of the welding nail filling rod, and one end of the rope is connected to the welding nail filling rod through the rope traction ring.

[0016] Preferably, the number of the filling device support frames is four, the two welding nail filling rods are arranged in a mirror image, and a filling device support frame is arranged on both sides of the two welding nail filling rods.

[0017] Preferably: the shell has a cylindrical shell, the upper part of the shell is provided with a welding nail inlet, the lower part of the shell is provided with a welding nail outlet, the welding nail conveying device and the welding nail filling device are located between the welding nail inlet and the welding nail outlet, and the welding nail inlet, welding nail outlet and shell are all coaxially arranged.

[0018] A wire filling method for sealing micropores on the surface of a thin-walled hollow metal ball adopts a wire filling device for sealing micropores on the surface of a thin-walled hollow metal ball, and the wire filling device for sealing micropores on the surface of a thin-walled hollow metal ball is a wire filling device, comprising the following steps:

[0019] Step 1: Insert the welding nail from the welding nail entrance. After entering the device, the welding nail falls due to gravity. The nail cap hooks the conveyor belt grooves on both sides, and the welding nail moves downward with the conveyor belt. The time interval between each welding nail insertion is calculated based on the linear speed of the conveyor wheel and the distance between adjacent grooves on the conveyor belt.

[0020] Step 2: The welding nail moves to the bottom of the conveyor belt with the conveyor belt. Under the action of gravity, the welding nail enters the wire filling device. The nail cap is supported by the welding nail support rod, and the nail body and nail tip extend through the welding nail outlet;

[0021] Step 3: The welding nail filling rods on both sides are driven by the rotating electric shaft to rotate inward, and the welding nail filling rods are downwardly contacted with the welding nail cap, so that the welding nail filling rods exert a pressure on the top of the welding nail cap. During the downward rotation of the welding nail filling rods, the ropes passing around the fixed pulley drive the welding nail support rods to slide outward along the supporting frame of the filling device. The support at the bottom of the nail cap disappears, and the top of the nail cap is subjected to the pressure of the welding nail filling rods. The welding nail is pushed out of the wire filling device, and the welding nail is filled into the micropores on the surface of the thin-walled hollow metal ball.

[0022] Step 4: The rotating electric shaft stops, and the welding nail support rod is reset under the action of the spring, and at the same time drives the welding nail filling rod to reset, waiting to fill the next welding nail.

[0023] Preferably: in step 1, the welding nail entrance is arranged just above the gap between the two conveyor belts in the conveyor device, and when the conveyor belt is at the top corner, the opening direction of the groove on its surface is obliquely upward, wherein the opening direction of the left conveyor belt groove is the upper right, and the opening direction of the right conveyor belt groove is the upper left, and the nail cap part hooks the lower side wall of the conveyor belt groove on both sides. As the conveyor belt moves downward, the opening direction of the groove gradually becomes horizontal, and the upper side wall of the groove gradually presses the nail cap, that is, the welding nail is fixed through the groove;

[0024] In step 2, when the welding nail moves with the conveyor belt to the lower part of the conveyor belt, the opening direction of the groove is obliquely downward, among which the opening direction of the left conveyor belt groove is the lower right, and the opening direction of the right conveyor belt groove is the lower left. The lower side walls of the grooves on both sides that drive the welding nails to move move to both sides with the conveyor belt, and the welding nails fall under the action of gravity;

[0025] In step 3, the welding pin outlet of the wire filling device is located above the thin-walled hollow metal ball;

[0026] In step 4, the time interval for placing the welding nails in step 1 is equal to the time interval for filling or filling the welding nails in step 3.

[0027] Preferably, in step 1, the diameter of the micropores on the surface of the thin-walled hollow metal sphere is d, and the wall thickness of the structure is h. The diameter of the nail cap is designed to be 1.5d, the thickness of the nail cap is designed to be 0.5h, the top diameter of the nail body is designed to be 0.9d, the length of the nail body is designed to be 1.5h, the linear speed of the conveyor wheel is v, and the distance between adjacent grooves on the conveyor belt is L, where L>1.5h needs to be satisfied. Then, the time interval for placing the welding nails is t=L / v;

[0028] In step 2, the vertical distance from the bottom end of the conveyor belt to the welding nail support rod is less than or equal to 5 mm.

[0029] The present invention has the following beneficial effects:

[0030] The present invention is used for the wire filling process of sealing micropores on the surface of thin-walled hollow metal balls. It can complete the wire filling task of sealing micropores on the surface of thin-walled hollow metal balls, reduce the difficulty of operation, accurately control the amount of wire filling, have high wire filling efficiency, and a high degree of automation, thereby avoiding the problem of the sealed thin-walled hollow metal balls being burned through or the poor sealing quality.

[0031] The present invention has an ingenious structure and saves energy and reduces costs while ensuring stable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of a wire-filling device used to seal micropores on the surface of thin-walled hollow metal balls;

[0033] Figure 2 It is a partial structural diagram of the welding nail conveying device;

[0034] Figure 3 It is a structural diagram of a welding nail filling device;

[0035] Figure 4 yes Figure 3 Schematic diagram of the middle A direction;

[0036] Figure 5 yes Figure 3 Schematic diagram of the middle B direction;

[0037] Figure 6 This is a diagram showing the use of a wire-filling device for sealing micropores on the surface of thin-walled hollow metal balls.

[0038] Figure 7 yes Figure 6 Schematic diagram of the center C direction.

[0039] In the figure: 1-nail cap, 2-nail body, 3-nail tip, 4-nail conveying device, 5-nail filling device, 6-housing, 7-nail inlet, 8-nail outlet, 9-nail, 10-conveyor belt, 11-groove, 12-transmission wheel, 13-nail filling rod, 14-nail support rod, 15-filling device support frame, 16-spring, 17-rope, 18-fixed pulley, 19-rope traction ring, 20-electric shaft bearing, 21-rotating electric shaft, 22-wire filling device, 23-thin-wall hollow metal ball, 24-micropore. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0041] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] Specific implementation method 1: Combination Figure 1-7 The present embodiment is described. The wire filling device for sealing the micropores on the surface of thin-walled hollow metal balls in the present embodiment includes a rivet conveying device 4, a rivet filling device 5 and a shell 6. The rivet conveying device 4 and the rivet filling device 5 are installed on the shell 6. The rivet conveying device 4 is located above the rivet filling device 5. The rivet conveying device 4 is used to convey the rivets 9 to the top of the rivet filling device 5. The rivet filling device 5 is used to fill the rivets 9 into the part to be welded. The present invention is used for the wire filling process of sealing the micropores on the surface of thin-walled hollow metal balls. It can complete the wire filling task of sealing the micropores on the surface of thin-walled hollow metal balls, reduce the difficulty of operation, accurately control the amount of wire filling, have high wire filling efficiency and high degree of automation, and avoid the problem of sealed thin-walled hollow metal balls being burned through or having poor sealing quality.

[0043] The welding nail conveying device 4 includes a conveying wheel 12 and a conveyor belt 10. The two conveyor belts 10 are arranged in a mirror image. A conveying wheel 12 is provided at each end of the conveyor belt 10, and a conveying wheel 12 is provided in the middle of the conveyor belt 10. Any conveying wheel 12 at the end is connected to the output end of the motor, and the motor is connected to the housing 6 through bolts. A number of equidistant grooves 11 are processed on the conveyor belt 10, and the conveying wheel 12 is rotatably connected to the housing 6.

[0044] The welding nail 9 comprises a nail cap 1, a nail body 2 and a nail tip 3, wherein the nail cap 1, the nail body 2 and the nail tip 3 are sequentially coaxially arranged. The welding nail (9) is made of an ordinary cylindrical welding wire through mechanical processing means such as grinding and shearing. The width of the groove 11 is equal to the thickness of the nail cap 1 of the welding nail 9, and both sides of the nail cap 1 are arranged in the groove 11 arranged in a mirror image.

[0045] The welding nail filling device 5 includes a welding nail filling rod 13, a welding nail support rod 14, a filling device support frame 15, a spring 16, a rope 17, a fixed pulley 18, an electric shaft bearing 20 and a rotating electric shaft 21. The side of the housing 6 is equipped with a mirror-image fixed pulley 18, and the lower part of the housing 6 is equipped with a mirror-image filling device support frame 15. The filling device support frame 15 has a cavity, and the filling device support frame 15 is equipped with a spring 16. One end of the welding nail support rod 14 extends into the inner cavity and is slidably connected to the inner cavity. The two ends of the spring 16 respectively press against the inner side wall of the outer end of the filling device support frame 15 and the end face of the inserted end of the welding nail support rod 14. The electric shaft bearing 20 is installed on the outer side of the filling device support frame 15. The welding nail filling rod 13 is connected to the electric shaft bearing 20 through a rotating electric shaft 21. One end of the rope 17 is connected to the middle part of the welding nail filling rod 13, and the other end of the rope 17 passes around the fixed pulley 18, and the other end of the rope 17 passes through the small hole on the outer end side wall of the filling device support frame 15 and is connected to the inserted end of the welding nail support rod 14.

[0046] The welding nail filling device 5 further includes a rope traction ring 19 , which is fixed to the middle of the welding nail filling rod 13 , and one end of the rope 17 is connected to the welding nail filling rod 13 through the rope traction ring 19 .

[0047] There are four filling device support frames 15 , and the two welding nail filling rods 13 are arranged in a mirror image, with a filling device support frame 15 arranged on both sides of the two welding nail filling rods 13 .

[0048] The shell 6 has a cylindrical outer shell, the upper part of the shell 6 is provided with a welding nail inlet 7, the lower part of the shell 6 is provided with a welding nail outlet 8, the welding nail conveying device 4 and the welding nail filling device 5 are located between the welding nail inlet 7 and the welding nail outlet 8, and the welding nail inlet 7, the welding nail outlet 8 and the shell 6 are all coaxially arranged.

[0049] Specific implementation method 2: Combination Figure 1-7The present embodiment is described. The wire filling method for sealing micropores on the surface of thin-walled hollow metal balls in the present embodiment adopts the wire filling device for sealing micropores on the surface of thin-walled hollow metal balls as described in claim 7. The wire filling device for sealing micropores on the surface of thin-walled hollow metal balls is a wire filling device 22, which includes a rivet conveying device 4, a rivet filling device 5 and a shell 6. The rivet conveying device 4 and the rivet filling device 5 are installed on the shell 6. The rivet conveying device 4 is located above the rivet filling device 5. The rivet conveying device 4 is used to convey the rivet 9 to the top of the rivet filling device 5. The rivet filling device 5 is used to fill the rivet 9 into the part to be welded. The part to be welded is the micropores 24 on the surface of the thin-walled hollow metal ball 23.

[0050] The welding nail conveying device 4 includes a conveying wheel 12 and a conveyor belt 10. The two conveyor belts 10 are arranged in a mirror image. A conveying wheel 12 is provided at each end of the conveyor belt 10, and a conveying wheel 12 is provided in the middle of the conveyor belt 10. Any conveying wheel 12 at the end is connected to the output end of the motor, and the motor is connected to the housing 6 through bolts. A number of equidistant grooves 11 are processed on the conveyor belt 10, and the conveying wheel 12 is rotatably connected to the housing 6.

[0051] The welding nail 9 includes a nail cap 1, a nail body 2 and a nail tip 3. The nail cap 1, the nail body 2 and the nail tip 3 are coaxially arranged in sequence. The width of the groove 11 is equal to the thickness of the nail cap 1 of the welding nail 9. Both sides of the nail cap 1 are arranged in the mirror-image groove 11.

[0052] The welding nail filling device 5 includes a welding nail filling rod 13, a welding nail support rod 14, a filling device support frame 15, a spring 16, a rope 17, a fixed pulley 18, an electric shaft bearing 20 and a rotating electric shaft 21. The side of the housing 6 is equipped with a mirror-image fixed pulley 18, and the lower part of the housing 6 is equipped with a mirror-image filling device support frame 15. The filling device support frame 15 has a cavity, and the filling device support frame 15 is equipped with a spring 16. One end of the welding nail support rod 14 extends into the inner cavity and is slidably connected to the inner cavity. The two ends of the spring 16 respectively press against the outer ends of the filling device support frame 15 The inner wall and the end face of the extending end of the welding nail support rod 14, the outer side of the filling device support frame 15 is installed with an electric shaft bearing 20, the welding nail filling rod 13 and the electric shaft bearing 20 are connected through a rotating electric shaft 21, one end of the rope 17 is connected to the middle part of the welding nail filling rod 13, the other end of the rope 17 passes around the fixed pulley 18, and the other end of the rope 17 passes through the small hole in the outer end side wall of the supporting frame 15 of the tightening filling device and is connected to the extending end of the welding nail support rod 14. The device structure is ingenious and uses a spring to automatically return to its original position. On the basis of ensuring the stable operation of the device, it saves energy and reduces costs.

[0053] The welding nail filling device 5 further includes a rope traction ring 19 , which is fixed to the middle of the welding nail filling rod 13 , and one end of the rope 17 is connected to the welding nail filling rod 13 through the rope traction ring 19 .

[0054] There are four filling device support frames 15 , and the two welding nail filling rods 13 are arranged in a mirror image, with a filling device support frame 15 arranged on both sides of the two welding nail filling rods 13 .

[0055] The housing 6 has a cylindrical outer shell. A welding nail inlet 7 is provided at the upper portion of the housing 6, and a welding nail outlet 8 is provided at the lower portion of the housing 6. The welding nail conveying device 4 and the welding nail filling device 5 are located between the welding nail inlet 7 and the welding nail outlet 8. The welding nail inlet 7, the welding nail outlet 8 and the housing 6 are all coaxially arranged.

[0056] The following steps are involved:

[0057] Step 1: Insert the welding nail 9 from the welding nail inlet 7. After entering the device, the welding nail 9 falls due to gravity. The nail cap 1 hooks on the conveyor belt grooves 11 on both sides and is not hindered by the upper side walls of the grooves 11. The welding nail 9 moves downward along the conveyor belt 10. The time interval between the insertion of each welding nail 9 is calculated based on the linear speed of the conveyor wheel 12 and the distance between adjacent grooves 11 on the conveyor belt 10.

[0058] In step 1, the welding nail entrance 7 is set just above the gap between the two conveyor belts 10 in the conveyor device 4, and when the conveyor belt 10 is at the top corner, the opening direction of the groove 11 on its surface is obliquely upward, wherein the opening direction of the left conveyor belt groove 11 is the upper right, and the opening direction of the right conveyor belt groove 11 is the upper left. The nail cap 1 partially hooks the lower side wall of the conveyor belt groove 11 on both sides. As the conveyor belt 10 moves downward, the opening direction of the groove 11 gradually becomes horizontal, and the upper side wall of the groove 11 gradually presses the nail cap, that is, the welding nail 9 is fixed through the groove 11;

[0059] In step 1: the diameter of the micropores on the surface of the thin-walled hollow metal sphere is d, and the wall thickness of the structure is h. The diameter of the nail cap 1 is designed to be 1.5d, the thickness of the nail cap 1 is designed to be 0.5h, the top diameter of the nail body 2 is designed to be 0.9d, the length of the nail body 2 is designed to be 1.5h, the linear speed of the conveyor wheel 10 is v, and the distance between adjacent grooves 11 on the conveyor belt 10 is L, where L>1.5h needs to be satisfied. The time interval t for placing the welding nail 9 is t=L / v;

[0060] Step 2: The welding nail 9 moves along the conveyor belt 10 to the bottom of the conveyor belt 10. The welding nail 9 enters the wire filling device 5 under the action of gravity. The nail cap 1 is supported by the welding nail support rod 14, and the nail body 2 and the nail tip 3 are extended through the welding nail outlet 8.

[0061] In step 2, when the welding nail 9 moves with the conveyor belt 10 to the lower part of the conveyor belt 10 and turns, the opening direction of the groove 11 is obliquely downward, the left conveyor belt moves clockwise, and the right conveyor belt moves counterclockwise, and the movement speed is equal to ensure that the welding nail is smoothly fed downward, wherein the opening direction of the left conveyor belt groove 11 is the lower right, and the opening direction of the right conveyor belt groove 11 is the lower left, and the lower side walls of the grooves 11 on both sides that drive the welding nail 9 to move move to both sides with the conveyor belt 10, and the welding nail falls under the action of gravity;

[0062] In step 2, the vertical distance from the bottom end of the conveyor belt 10 to the welding nail support rod 14 is less than 5 mm, and the welding nail 9 can be considered to have a smooth transition from the conveyor belt 10 to the wire filling device 5;

[0063] Step 3: The welding nail filling rods 13 on both sides are driven by the rotating electric shaft 21 to rotate inward, and the welding nail filling rods 13 are downwardly contacted with the welding nail cap 1, so that the welding nail filling rods 13 exert a pressure on the top of the welding nail cap 1. During the downward rotation of the welding nail filling rods 13, the rope 17 passing through the fixed pulley 18 drives the welding nail support rods 14 to slide outward along the filling device support frame 15. The bottom support of the nail cap 1 disappears, and the top of the nail cap 1 is subjected to the pressure of the welding nail filling rods 13. The welding nail 9 is pushed out of the wire filling device 22 and filled into the micropores 24 on the surface of the thin-walled hollow metal ball 23;

[0064] In step 3, the welding nail outlet 8 of the wire filling device 22 is located just above the micropores on the surface of the thin-walled hollow metal ball 23;

[0065] Step 4: The rotating electric shaft 21 stops, and the rivet support rod 14 is reset under the action of the spring 16, and at the same time drives the rivet filling rod 13 to reset and wait for the next rivet 9 to be filled;

[0066] In step 4, the time interval for placing the welding nails 9 in step 1 is equal to the time interval for filling or filling the welding nails 9 in step 3.

[0067] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutations and combinations. Therefore, the present invention will no longer describe the technical solutions after permutations and combinations one by one, but it should be understood that the technical solutions after permutations and combinations have been disclosed by the present invention.

[0068] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A wire-filling device for sealing micropores on the surface of thin-walled hollow metal balls, characterized by: The invention comprises a welding nail conveying device (4), a welding nail filling device (5) and a shell (6), wherein the welding nail conveying device (4) and the welding nail filling device (5) are installed on the shell (6), the welding nail conveying device (4) is located above the welding nail filling device (5), the welding nail conveying device (4) is used to convey welding nails (9) to the top of the welding nail filling device (5), and the welding nail filling device (5) is used to fill welding nails (9) into the position to be welded; the welding nail filling device (5) comprises a welding nail filling rod (13), a welding nail support rod (14), a filling device support frame (15), a spring (16), a rope (17), a fixed pulley (18), an electric shaft bearing (20) and a rotating electric shaft (21), and a fixed pulley (18) arranged in a mirror image is installed on the side of the shell (6). A mirror-image filling device support frame (15) is installed at the lower part of the shell (6), and a cavity is provided in the filling device support frame (15). A spring (16) is installed in the filling device support frame (15). One end of the welding nail support rod (14) extends into the inner cavity and is slidably connected to the inner cavity. The two ends of the spring (16) respectively press against the inner side wall of the filling device support frame (15) and the end face of the welding nail support rod (14). An electric shaft bearing (20) is installed on the outer side of the filling device support frame (15). The welding nail filling rod (13) is connected to the electric shaft bearing (20) through a rotating electric shaft (21). One end of the rope (17) is connected to the middle part of the welding nail filling rod (13), and the other end of the rope (17) passes around the fixed pulley (18) and is connected to the welding nail support rod (14).

2. The wire filling device for sealing micropores on the surface of thin-walled hollow metal balls according to claim 1, characterized in that: The welding nail conveying device (4) comprises a conveying wheel (12) and a conveying belt (10). The two conveying belts (10) are arranged in mirror image. A conveying wheel (12) is provided at each end of the conveying belt (10). A plurality of equally spaced grooves (11) are machined on the conveying belt (10). The conveying wheel (12) is rotatably connected to the housing (6).

3. The wire filling device for sealing micropores on the surface of thin-walled hollow metal balls according to claim 2, characterized in that: The width of the groove (11) is equal to the thickness of the nail cap (1) of the welding nail (9).

4. The wire filling device for sealing micropores on the surface of thin-walled hollow metal balls according to claim 2, characterized in that: The welding nail filling device (5) also includes a rope traction ring (19), which is fixed to the middle part of the welding nail filling rod (13), and one end of the rope (17) is connected to the welding nail filling rod (13) through the rope traction ring (19).

5. The wire filling device for sealing micropores on the surface of thin-walled hollow metal balls according to claim 2, characterized in that: The number of the filling device support frames (15) is four, the two welding nail filling rods (13) are mirror-imaged, and a filling device support frame (15) is arranged on both sides of the two welding nail filling rods (13).

6. The wire filling device for sealing micropores on the surface of thin-walled hollow metal balls according to claim 5, characterized in that: The shell (6) has a cylindrical outer shell. A welding nail inlet (7) is provided at the upper portion of the shell (6), and a welding nail outlet (8) is provided at the lower portion of the shell (6). A welding nail conveying device (4) and a welding nail filling device (5) are located between the welding nail inlet (7) and the welding nail outlet (8). The welding nail inlet (7), the welding nail outlet (8) and the shell (6) are all coaxially arranged.

7. A wire-filling method for sealing micropores on the surface of thin-walled hollow metal balls, characterized in that: The wire filling device for sealing micropores on the surface of thin-walled hollow metal balls according to claim 6 is a wire filling device (22), comprising the following steps: Step 1: insert the welding nail (9) from the welding nail entrance (7), and after the welding nail (9) enters the device, it falls due to gravity, and the nail cap (1) hooks the conveyor belt grooves (11) on both sides, and the welding nail (9) moves downward along the conveyor belt (10); according to the linear speed of the conveyor wheel (12) and the distance between adjacent grooves (11) on the conveyor belt (10), the time interval for inserting each welding nail (9) is calculated; Step 2: The welding nail (9) moves to the bottom of the conveyor belt (10) along with the conveyor belt (10), and the welding nail (9) enters the welding nail filling device (5) under the action of gravity, and the nail cap (1) is supported by the welding nail support rod (14), and the nail body (2) and the nail tip (3) extend through the welding nail outlet (8); Step 3: The welding nail filling rods (13) on both sides are driven to rotate inward by the rotating electric shaft (21), and the welding nail filling rods (13) are downwardly contacted with the welding nail cap (1), so that the welding nail filling rods (13) exert a pressure on the top of the welding nail cap (1). During the downward rotation movement of the welding nail filling rods (13), the rope (17) passing around the fixed pulley (18) drives the welding nail support rods (14) to slide outward along the filling device support frame (15), the bottom support of the nail cap (1) disappears, and the top of the nail cap (1) is subjected to the pressure of the welding nail filling rods (13), and the welding nail (9) is pushed out of the wire filling device (22), and the welding nail (9) is filled into the micropores (24) on the surface of the thin-walled hollow metal ball (23); Step 4: The rotating electric shaft (21) stops, and the welding nail support rod (14) is reset under the action of the spring (16), and at the same time drives the welding nail filling rod (13) to reset and wait for the next welding nail (9) to be filled.

8. The wire filling method for sealing micropores on the surface of thin-walled hollow metal balls according to claim 7, characterized in that: In step 1, the welding nail entrance (7) is set to be located just above the gap between the two conveyor belts (10) in the conveying device (4), and when the conveyor belt (10) is at the top corner, the opening direction of the groove (11) on its surface is obliquely upward, wherein the opening direction of the left conveyor belt groove (11) is the upper right, and the opening direction of the right conveyor belt groove (11) is the upper left, and the nail cap (1) partially hooks the lower side walls of the conveyor belt grooves (11) on both sides. As the welding nail (9) moves downward with the conveyor belt (10), the opening direction of the groove (11) gradually changes to the horizontal direction, and the upper side wall of the groove (11) gradually presses the nail cap, that is, the welding nail (9) is fixed through the groove (11); In step 2, when the welding nail (9) moves with the conveyor belt (10) to the lower part of the conveyor belt (10) and turns, the opening direction of the groove (11) is obliquely downward, wherein the opening direction of the left conveyor belt groove (11) is the lower right, and the opening direction of the right conveyor belt groove (11) is the lower left, and the lower side walls of the grooves (11) on both sides that drive the welding nail (9) to move move to both sides with the conveyor belt (10), and the welding nail falls under the action of gravity; In step 3, the welding nail outlet (8) of the wire filling device (22) is located above the thin-walled hollow metal ball (23); In step 4, the time interval for placing the welding nails (9) in step 1 is equal to the time interval for filling or filling the welding nails (9) in step 3.

9. The wire filling method for sealing micropores on the surface of thin-walled hollow metal balls according to claim 8, characterized in that: In step 1: the diameter of the micropores on the surface of the thin-walled hollow metal ball is d, and the wall thickness of the thin-walled hollow metal ball is h, then the diameter of the nail cap (1) is designed to be 1.5d, the thickness of the nail cap (1) is designed to be 0.5h, the top diameter of the nail body (2) is designed to be 0.9d, the length of the nail body (2) is designed to be 1.5h, the linear speed of the conveyor belt (10) is v, and the distance between adjacent grooves (11) on the conveyor belt (10) is L, wherein L>1.5h needs to be satisfied, and the time interval t for placing the welding nail (9) is t=L / v; In step 2, the vertical distance from the bottom end of the conveyor belt (10) to the welding nail support rod (14) is less than or equal to 5 mm.

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