Portable electromagnetic shoot nail connection accelerating device and method based on spring energy storage

Abstract

The invention provides a portable electromagnetic nail shooting connection acceleration device and method based on spring energy storage, the portable electromagnetic nail shooting connection acceleration device comprises a magnetic pulse assembly, a spring energy storage assembly and a trigger release assembly which are sequentially arranged and connected, and the magnetic pulse assembly comprises a discharge control system, a coil (20) and a first punch (4); the spring energy storage assembly comprises an energy storage elastic piece and a trigger (9) which are arranged in a first limiting sleeve (6), and a plurality of clamping grooves are formed in the inner wall of the first limiting sleeve in the sleeve direction. During energy storage, transient electromagnetic force of the coil drives the first punch to impact the tail end of the trigger to enable the trigger to move towards the trigger release assembly, the head end of the trigger is connected with the tail end of the energy storage elastic piece to enable the energy storage elastic piece to store energy during compression, and the trigger is inserted into different clamping grooves of the first limiting sleeve through pin parts on the side wall of the trigger to store energy in stages. When each stage of energy storage is completed, the trigger moves to the trigger part of the trigger release assembly and is connected with the trigger part; the device is simple in structure, and the device cost and risk can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic nail connection, in particular to a portable electromagnetic nail connection acceleration device and method based on spring energy storage, and specifically to a portable nail connection acceleration device and method combining electromagnetic energy and spring energy storage. Background Art

[0002] In recent years, the process of automobile electrification and intelligence has been significantly accelerated, and the design and manufacturing cycle of automobile product production lines has been greatly shortened. In the process of lightweighting the car body, it is inevitable to use many new lightweight and high-strength materials, such as aluminum alloy and carbon fiber. Traditional spot welding or arc welding has great limitations and cannot achieve welding. Therefore, a variety of mechanical connection technologies have been derived. High-speed nail connection technology has received widespread attention and application in the automotive industry due to its simple process, short time, single-sided riveting, and reliable structure.

[0003] Electromagnetic forming stimulates a huge Lorentz force inside the workpiece through a transient strong magnetic field, which can generate ultra-high impact force (up to hundreds to thousands of megapascals) in a very short time (microsecond level), which is consistent with the energy requirements of nail connection technology, avoiding the safety hazards of explosives in traditional technology, and can achieve high-speed, high-energy impact processing without mechanical contact. However, the release of instantaneous high energy in electromagnetic forming is often accompanied by strong mechanical recoil, which requires strengthening the equipment's impact resistance structure and safety protection, and is prone to equipment fatigue or operational risks; at the same time, high-power pulse power supplies are expensive, capacitors have limited high-power discharge life, and electromagnetic forming equipment is fixed, with low degrees of freedom and cumbersome operation, making it difficult to achieve low-cost, high-reliability large-scale mass production.

[0004] In the prior art, spring energy storage mechanisms are mostly used for mechanical energy storage, but have not yet been optimized in coordination with electromagnetic pulses to solve the above-mentioned problems.

[0005] The present invention realizes precise control of output energy and lightweight equipment through the coordinated release of electromagnetic-spring energy. Summary of the invention

[0006] The present invention proposes a portable electromagnetic nail connection acceleration device and method based on spring energy storage, which has a simple structure, reduces the cost and risk of the device through secondary storage and quantitative release of electromagnetic energy, and is suitable for efficient connection of light alloy plates.

[0007] A portable electromagnetic nail-shooting connection acceleration device based on spring energy storage, the acceleration device comprising a magnetic pulse component, a spring energy storage component and a trigger release component which are sequentially arranged and connected, the magnetic pulse component comprising a discharge control system, a coil (20) and a first punch (4); the spring energy storage component comprising an energy storage elastic part and a trigger (9) arranged in a first limiting sleeve (6), and a plurality of slots are arranged on the inner wall of the first limiting sleeve along the sleeve direction; when storing energy, the transient electromagnetic force of the coil drives the first punch to impact the rear end of the trigger so that the trigger moves toward the trigger release component, the head end of the trigger is connected to the rear end of the energy storage elastic part so that it stores energy when compressed, and the trigger inserts the pin part on the side wall of the trigger into different slots of the first limiting sleeve to store energy in stages; when each stage of energy storage is completed, the trigger moves to the trigger part of the trigger release component and connects with it.

[0008] The energy storage elastic member is an energy storage spring (10). During the energy storage process of the energy storage spring, the square pin (7) with the square pin spring (8) on the side wall of the trigger is inserted into different slots of the first limiting sleeve to prevent retreat, and the energy storage spring is compressed in stages to store energy in stages.

[0009] The trigger release assembly comprises a second punch (17) arranged in a second limiting sleeve (16); the tail end of the second punch is connected to the head end of the energy storage spring, and a cylindrical pin (11) with a supporting spring is provided on the side wall of the second punch. The cylindrical pin is a triggering member of the trigger release assembly. When the acceleration device stores energy, the cylindrical pin passes through the through hole on the side wall of the second limiting sleeve to fix the second punch to the second limiting sleeve.

[0010] An inclined surface is provided on the top of the side wall of the trigger, and the top of the cylindrical pin is a hemispherical surface. When the acceleration device completes the staged energy storage, the inclined surface of the side wall of the trigger connects with the cylindrical pin of the trigger release assembly and presses the cylindrical pin back into the through hole on the side wall of the second limiting sleeve, so that the second punch can move under the elastic force of the energy storage spring after energy storage, thereby releasing the elastic potential energy of the energy storage spring.

[0011] The coil (20) is placed at the rear end of the first punch (4), and the coil (20) and the first punch (4) are both arranged in the inner cavity of the sleeve (2) with the end cover (1); A punch rod (13) for striking the nail (15) at high speed is provided at the head end of the second punch.

[0012] A first punch reset spring (18) is arranged in the sleeve, and two ends of the first punch reset spring are respectively connected to the first punch and the limit plate (4). When the coil stops applying electromagnetic force, the first punch is reset under the drive of the first punch reset spring.

[0013] A trigger reset spring (24) is connected between the head end of the first punch and the tail end of the trigger. The trigger reset spring is stretched during the energy storage process of the energy storage spring. When the elastic potential energy of the energy storage spring is released and the square pin is not inserted into the slot of the first limiting sleeve, the trigger moves toward the coil direction and resets under the elastic force of the trigger reset spring.

[0014] A rubber pad (21) for buffering is provided at the coil; both ends of the coil are connected to a discharge control system, and the electromagnetic force generated by the coil drives the first punch to move via the driving copper plate (3).

[0015] The wall of the first limiting sleeve is symmetrically provided with a central axis of the first limiting sleeve as a symmetric axis, and symmetrical square notches matched with the square pins are symmetrically provided, and one side of the symmetrical square notches is a 45° inclined surface; each pair of square notches is distributed along the wall of the first limiting sleeve in the direction of the first limiting sleeve; The square pin and the square pin spring are embedded in the trigger, and their height does not exceed the first limiting sleeve. When the trigger is impacted by the first punch, the trigger moves and compresses the square pin spring to enter the next square notch.

[0016] A working method of a portable electromagnetic nail-shooting connection acceleration device based on spring energy storage, wherein the method adjusts the length of a first limiting sleeve where the trigger is located so that the compression amount of the energy storage spring can be accurately controlled each time the cylindrical pin of the second punch is pressed in, thereby realizing the quantitative release of elastic potential energy converted by electromagnetic force, and comprises the following steps; Step S1: Assemble the components of the acceleration device; adjust the length of the first limiting sleeve where the trigger is located; The coil with the polyimide tape wrapped around the surface after pretreatment is spliced ​​with the positive and negative poles of the conductive strip of the magnetic pulse device, and the two ends of the first punch reset spring are welded to the limit plate and the first punch, the two ends of the trigger reset spring are welded to the limit plate and the trigger, the square pin spring is welded to the square pin and the trigger, and the cylindrical pin spring is welded to the cylindrical pin and the second punch; Step S2: Turn on the power supply and perform the first discharge. The trigger is impacted, causing the square pin to enter the second slot from the first slot of the first limiting sleeve, the energy storage spring is compressed for a certain distance, and the first punch reset spring causes the first punch to return to the initial position; Step S3: Continue to turn on the power supply and perform the second discharge. Similar to the previous step, the square pin is stuck in the third slot. At this time, the trigger and the cylindrical pin are close to each other again, and the spring energy storage increases. Step S4: Align the nail with the sample and turn on the power. When the subsequent discharge impact presses the cylindrical pin into the groove of the second limiting sleeve, the elastic potential energy of the energy storage spring is released, driving the second punch to accelerate, and the punch rod collides with the nail, causing it to be shot into the sample at a high speed. Step S5: Manually press the square pins on both sides of the trigger into the first limiting sleeve, and the trigger is reset under the action of the trigger reset spring, and the device returns to the initial state.

[0017] The invention is based on a portable electromagnetic nail connection acceleration device and method for spring energy storage, utilizes the huge repulsive force generated by an electromagnetic coil and a workpiece to compress a spring, and realizes an energy enhancement effect through a coordinated release mechanism of electromagnetic energy and spring energy storage; the device comprises a magnetic pulse component, a spring energy storage component and a trigger release component, the magnetic pulse component comprises a discharge control system, a sleeve, an end cover, a coil and a first punch, both ends of the coil are connected to the discharge control system, a transient electromagnetic force is generated and buffered under a rubber pad; one end of the spring energy storage component is subjected to impact energy storage, and the other end is fixed by a limited position, comprises a first limiting sleeve, a trigger, a square pin and a square pin spring, the square pin is embedded in a card slot of the first limiting sleeve, and electromagnetic impact energy is stored in stages; the trigger release component comprises a trigger, an energy storage spring, a second limiting sleeve, a second punch, a cylindrical pin and a cylindrical pin spring, the trigger collides with the cylindrical pin, accurately releases the elastic potential energy of the energy storage spring, and drives the punch on the second punch to impact the nail at a high speed; the invention has a simple structure, reduces the cost and risk of the device through secondary storage and quantitative release of electromagnetic energy, and is suitable for efficient connection of light alloy plates.

[0018] Compared with the prior art, the beneficial effects of the present invention are: by optimizing the energy release structure, reducing the number of winding turns and the cross-sectional area, while reducing the reverse Lorentz force, the electromagnetic force density is increased, thereby improving safety and coil life. A spring energy storage mechanism is adopted to temporarily store the energy discharged from a single circuit in a high-strength spring, and the instantaneous acceleration of nail shooting is achieved through the coordinated release of electromagnetic and spring energy, thereby ensuring reliable penetration of light alloy plates. By utilizing the characteristics of each different spring, after each circuit discharge impact, it is possible to achieve reset, which is convenient for the next process, and the length of the outer cylinder of the trigger is adjusted. The compression amount of the energy storage spring can be ensured each time the cylindrical pin is pressed in, thereby achieving quantitative energy release, simplifying the drive structure while ensuring that the penetration kinetic energy is controllable, and achieving low equipment cost.

[0019] The beneficial effects of the present invention also lie in: 1. By optimizing the energy release structure, reducing the number of winding turns and cross-sectional area, the electromagnetic force density is increased while reducing the reverse Lorentz force, thereby improving safety and coil life.

[0020] 2. The spring energy storage mechanism is adopted to temporarily store the energy discharged from the primary circuit in the high-strength spring. The instantaneous acceleration of the nail shooting is achieved through the coordinated release of electromagnetic and spring energy, ensuring the reliable penetration of the light alloy plate.

[0021] 3. By utilizing the characteristics of each different spring, after each circuit discharge impact, it can be reset to facilitate the next process. The length of the trigger outer cylinder can be adjusted to ensure the compression of the energy storage spring each time the cylindrical pin is pressed in, thereby achieving quantitative energy release. The drive structure is simplified while ensuring that the penetration kinetic energy is controllable, achieving low cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Attached Figure 1 It is a schematic diagram of the overall structure of the device; Attached Figure 2 This is a schematic diagram of the primary energy storage device; Attached Figure 3 It is a schematic diagram of triggering the energy storage spring; Attached Figure 4 This is a schematic diagram of the details of the square pin and the slot; Attached Figure 5 This is a schematic diagram of the details of the cylindrical pin and the groove; Attached Figure 6 It is a schematic diagram of the working process of the device; Attached Figure 7 The figure is a schematic diagram of the overall appearance of the device; In the figure: 1. end cover; 2. sleeve; 3. driving copper plate; 4. first punch; 5. limit plate; 6. first limit sleeve; 7. square pin; 8. square pin spring; 9. trigger; 10. energy storage spring; 11. cylindrical pin; 12. cylindrical pin spring; 13. punch rod; 14. guide ring; 15. nail; 16. second limit sleeve; 17. second punch; 18. first punch reset spring; 19. M6×20 cross screw; 20. coil; 21. rubber pad; 22. M8 hexagonal nut; 23. M8×40 hexagonal bolt; 24. trigger reset spring. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] As shown in the figure, a portable electromagnetic nail connection acceleration device based on spring energy storage is provided, wherein the acceleration device comprises a magnetic pulse component, a spring energy storage component and a trigger release component which are sequentially arranged and connected, wherein the magnetic pulse component comprises a discharge control system, a coil 20 and a first punch 4; the spring energy storage component comprises an energy storage elastic member and a trigger 9 arranged in a first limiting sleeve 6, and a plurality of slots are arranged along the sleeve direction on the inner wall of the first limiting sleeve; when storing energy, the transient electromagnetic force of the coil drives the first punch to impact the tail end of the trigger so that the trigger moves toward the trigger release component, the head end of the trigger is connected to the tail end of the energy storage elastic member so that it stores energy when compressed, and the trigger inserts the pin component at the side wall of the trigger into different slots of the first limiting sleeve to store energy in stages; when all stages of energy storage are completed, the trigger moves to the trigger member of the trigger release component and connects with it.

[0025] The energy storage elastic member is an energy storage spring 10. During the energy storage process of the energy storage spring, the trigger inserts the square pin 7 with the square pin spring 8 on its side wall into different slots of the first limiting sleeve to prevent retreat, and the energy storage spring is compressed in stages to store energy in stages.

[0026] The trigger release assembly includes a second punch 17 arranged in a second limiting sleeve 16; the tail end of the second punch is connected to the head end of the energy storage spring, and a cylindrical pin 11 with a supporting spring is provided at the side wall of the second punch. The cylindrical pin is a trigger part of the trigger release assembly. When the acceleration device stores energy, the cylindrical pin passes through the through hole on the side wall of the second limiting sleeve to fix the second punch to the second limiting sleeve.

[0027] An inclined surface is provided on the top of the side wall of the trigger, and the top of the cylindrical pin is a hemispherical surface. When the acceleration device completes the staged energy storage, the inclined surface of the side wall of the trigger connects with the cylindrical pin of the trigger release assembly and presses the cylindrical pin back into the through hole on the side wall of the second limiting sleeve, so that the second punch can move under the elastic force of the energy storage spring after energy storage, thereby releasing the elastic potential energy of the energy storage spring.

[0028] The coil 20 is placed at the tail end of the first punch 4, and the coil 20 and the first punch 4 are both arranged in the inner cavity of the sleeve 2 with the end cover 1; A punch rod 13 for striking the nail 15 at high speed is provided at the head end of the second punch.

[0029] A first punch reset spring 18 is arranged in the sleeve, and both ends of the first punch reset spring are respectively connected to the first punch and the limit plate 4. When the coil stops applying electromagnetic force, the first punch is reset under the driving force of the first punch reset spring.

[0030] A trigger reset spring 24 is connected between the head end of the first punch and the tail end of the trigger. The trigger reset spring is stretched during the energy storage process of the energy storage spring. When the elastic potential energy of the energy storage spring is released and the square pin is not inserted into the slot of the first limiting sleeve, the trigger moves toward the coil direction and resets under the elastic force of the trigger reset spring.

[0031] A rubber pad 21 for buffering is provided at the coil; both ends of the coil are connected to the discharge control system, and the electromagnetic force generated by the coil drives the first punch to move via the driving copper plate 3.

[0032] The wall of the first limiting sleeve is symmetrically provided with a central axis of the first limiting sleeve as a symmetric axis, and symmetrical square notches matched with the square pins are symmetrically provided, and one side of the symmetrical square notches is a 45° inclined surface; each pair of square notches is distributed along the wall of the first limiting sleeve in the direction of the first limiting sleeve; The square pin and the square pin spring are embedded in the trigger, and their height does not exceed the first limiting sleeve. When the trigger is impacted by the first punch, the trigger moves and compresses the square pin spring to enter the next square notch.

[0033] A working method of a portable electromagnetic nail-shooting connection acceleration device based on spring energy storage, wherein the method adjusts the length of a first limiting sleeve where the trigger is located so that the compression amount of the energy storage spring can be accurately controlled each time the cylindrical pin of the second punch is pressed in, thereby realizing the quantitative release of elastic potential energy converted by electromagnetic force, and comprises the following steps; Step S1: Assemble the components of the acceleration device; adjust the length of the first limiting sleeve where the trigger is located; The coil with the polyimide tape wrapped around the surface after pretreatment is spliced ​​with the positive and negative poles of the conductive strip of the magnetic pulse device, and the two ends of the first punch reset spring are welded to the limit plate and the first punch, the two ends of the trigger reset spring are welded to the limit plate and the trigger, the square pin spring is welded to the square pin and the trigger, and the cylindrical pin spring is welded to the cylindrical pin and the second punch; Step S2: Turn on the power supply and perform the first discharge. The trigger is impacted, causing the square pin to enter the second slot from the first slot of the first limiting sleeve, the energy storage spring is compressed for a certain distance, and the first punch reset spring causes the first punch to return to the initial position; Step S3: Continue to turn on the power supply and perform the second discharge. Similar to the previous step, the square pin is stuck in the third slot. At this time, the trigger and the cylindrical pin are close to each other again, and the spring energy storage increases. Step S4: Align the nail with the sample and turn on the power. When the subsequent discharge impact presses the cylindrical pin into the groove of the second limiting sleeve, the elastic potential energy of the energy storage spring is released, driving the second punch to accelerate, and the punch rod collides with the nail, causing it to be shot into the sample at a high speed. Step S5: Manually press the square pins on both sides of the trigger into the first limiting sleeve, and the trigger is reset under the action of the trigger reset spring, and the device returns to the initial state.

[0034] Embodiment 1: Referring to the accompanying drawings, the electromagnetic nail connection acceleration device proposed by the present invention is as follows Figure 1 As shown, it contains an end cover 1, a sleeve 2, a driving copper plate 3, a first punch 4, a limit plate 5, and a first limit sleeve 6; it includes a magnetic pulse component, a spring energy storage component (such as Figure 2 ) and trigger release components (such as Figure 3 ), the magnetic pulse assembly includes a discharge control system and a sleeve 2, an end cover 1, a coil 20 and a first punch 4, the coil 20 has positive and negative conductive strips connected to the discharge control system, and the first punch 4 is subjected to a huge electromagnetic pulse force during discharge; one end of the spring energy storage assembly is impacted and stored, and the other end is fixed in a limited position, including a first limiting sleeve 6, a trigger 9, a square pin 7 and a square pin spring 8, such as Figure 4 As shown, the square pin 7 is embedded in the slot of the first limiting sleeve 6, so that the energy can be stably stored after each spring energy storage; the trigger release assembly includes a trigger 9, an energy storage spring 10, a second limiting sleeve 16, a second punch 17, a punch rod 15, a cylindrical pin 11 and a cylindrical pin spring 12. After triggering, the cylindrical pin 11 is released in the inner groove of the second limiting sleeve 16 along with the second punch 17, and the punch rod 13 accelerates to hit the connected part.

[0035] like Figure 7 As shown, the end cover 1 is connected to the sleeve 2 by M8 bolts 23. According to the mechanical design specification, the distance between the bolts and the inner wall C1 is 13 mm, and the distance between the bolts and the outer edge C2 is 11 mm. Due to the presence of the notch, the bolts are distributed in a pentagonal shape.

[0036] like Figure 1 As shown, the driving copper plate 3 is in close contact with the coil 20, the copper plate has strong conductivity, and the material of the coil 20 is copper; when the coil 20 passes through the pulse current, the driving copper plate 3 is subjected to a huge driving force, pushing the first punch 4 to move forward; the coil 20 is limited in one direction by the step design inside the sleeve 2, and in the other direction by the rubber pad 21 buffering and the M8 nut 22 locking. The first punch 4 is connected to the driving copper plate 3 by an M6 cross screw 19, and the first punch reset spring 18 is welded to the first punch 4 and the limit plate 5 at both ends. After the first pulse current passes, the first punch 4 and the driving copper plate 3 return to the initial position through the spring to achieve the reset effect; the sleeve 2 and the first limit sleeve 6 are matched by surface thread screwing. To ensure the strength of the device, the length of the inner thread of the sleeve 2 is greater than the screwing length of the two; the limit plate 5 is located between the two to achieve positioning, and a conical mouth and a cylindrical protrusion for spring positioning are opened in the middle, and it is connected to the trigger 9 through the trigger reset spring 24.

[0037] like Figure 4 As shown, the first limiting sleeve 6 is provided with two symmetrical square notches which match the square pin 7, and one side is 45°; the square pin 7 and the square pin spring 8 are embedded in the trigger 9, and the height does not exceed the first limiting sleeve 6. When impacted, the square pin spring 8 is compressed to enter the next notch; the limiting plate 5 and the trigger 9 are provided with two symmetrical small cylinders in the direction perpendicular to the square pins 7 on both sides, which are respectively welded and fixed to the two ends of the trigger reset spring 24.

[0038] like Figure 5 As shown, the second limiting sleeve 16 is provided with four symmetrical circular holes, and four non-penetrating inner grooves are processed in the axial direction; the outer wall is provided with an annular plate, the size of which is consistent with the inner diameter of the first limiting sleeve 6, forming an axial and radial positioning function. The inner diameter of the trigger 9 has a 60° chamfer, and the outer diameter is a transition fit with the inner diameter of the first limiting sleeve 6; the tops of the four cylindrical pins 11 are hemispherical structures, which can slide into the grooves of the second limiting sleeve 16 when under pressure. The guide ring 14 is connected to the second limiting sleeve 16 by screwing, and the inner diameter of the guide ring 14 is designed according to the maximum diameter of the nail 15, leaving a gap of 0.5mm, requiring a high surface roughness level, and lubricating with oil during operation; the second punch 17 is connected to the punch rod 13 by screwing, and different diameters of punch rods 13 can be selected for nails 15 of different sizes.

[0039] like Figure 3 As shown, the trigger reset spring 24 is stretched to the maximum after completing one charging, and the square pin 7 is embedded in the lowest slot of the first limiting sleeve 6. The two square pins 7 need to be manually compressed inward, and the trigger 9 completes the reset under the pulling force of the trigger reset spring 24.

[0040] Embodiment 2: like Figures 1 to 3 and Figure 6 As shown, a working method of a portable electromagnetic nail-shooting connection acceleration device based on spring energy storage is carried out in the following steps: Step S1: splice the coil 20 with the polyimide tape wrapped around the surface after pretreatment to the positive and negative electrodes of the conductive strip of the magnetic pulse device, weld the two ends of the first punch reset spring 18 to the limit plate 5 and the first punch 4, weld the two ends of the trigger reset spring 24 to the limit plate 5 and the trigger 9, weld the square pin spring 8 to the square pin 7 and the trigger 9, and weld the cylindrical pin spring 12 to the cylindrical pin 11 and the second punch 17; Step S2: assemble the device parts from inside to outside, turn on the power, and perform the first discharge. The square pin 7 is impacted and enters the next notch. The spring is compressed for a distance, and the first punch reset spring 18 returns the first punch 4 to the initial position. Step S3: Continue to turn on the power supply and perform the second discharge. Similar to the previous step, the square pin 7 is stuck in the third notch. At this time, the trigger 9 is close to the cylindrical pin 11, and the spring energy storage increases; Step S4: Align the nail 15 with the sample, turn on the power, and the third impact causes the cylindrical pin 11 to be pressed into the groove of the second limiting sleeve 16, the elastic potential energy is released, the second punch 17 is accelerated, the punch rod 13 collides with the nail 15, and they are shot into the sample at a high speed; Step S5: Manually press the square pins 7 on both sides into the first limiting sleeve 6, and the trigger 9 is reset under the action of the trigger reset spring 24, and the device returns to the initial state.

Claims

1. A portable electromagnetic nail connection acceleration device based on spring energy storage, characterized in that: The acceleration device comprises a magnetic pulse component, a spring energy storage component and a trigger release component which are sequentially arranged and connected, wherein the magnetic pulse component comprises a discharge control system, a coil (20) and a first punch (4); the spring energy storage component comprises an energy storage elastic member and a trigger (9) arranged in a first limiting sleeve (6), and a plurality of slots are arranged on the inner wall of the first limiting sleeve along the sleeve direction; when storing energy, the transient electromagnetic force of the coil drives the first punch to impact the rear end of the trigger so that the trigger moves toward the trigger release component, the head end of the trigger is connected to the rear end of the energy storage elastic member so that it stores energy when compressed, and the trigger inserts the pin member on the side wall of the trigger into different slots of the first limiting sleeve to store energy in stages; when each stage of energy storage is completed, the trigger moves to the trigger member of the trigger release component and connects with it.

2. According to claim 1, a portable electromagnetic nail connection acceleration device based on spring energy storage is characterized in that: The energy storage elastic member is an energy storage spring (10). During the energy storage process of the energy storage spring, the square pin (7) with the square pin spring (8) on the side wall of the trigger is inserted into different slots of the first limiting sleeve to prevent retreat, and the energy storage spring is compressed in stages to store energy in stages.

3. A portable electromagnetic nail connection acceleration device based on spring energy storage according to claim 2, characterized in that: The trigger release assembly comprises a second punch (17) arranged in a second limiting sleeve (16); the tail end of the second punch is connected to the head end of the energy storage spring, and a cylindrical pin (11) with a supporting spring is provided on the side wall of the second punch. The cylindrical pin is a triggering member of the trigger release assembly. When the acceleration device stores energy, the cylindrical pin passes through the through hole on the side wall of the second limiting sleeve to fix the second punch to the second limiting sleeve.

4. According to claim 3, a portable electromagnetic nail connection acceleration device based on spring energy storage is characterized in that: An inclined surface is provided on the top of the side wall of the trigger, and the top of the cylindrical pin is a hemispherical surface. When the acceleration device completes the staged energy storage, the inclined surface of the side wall of the trigger connects with the cylindrical pin of the trigger release assembly and presses the cylindrical pin back into the through hole on the side wall of the second limiting sleeve, so that the second punch can move under the elastic force of the energy storage spring after energy storage, thereby releasing the elastic potential energy of the energy storage spring.

5. The portable electromagnetic nail connection acceleration device based on spring energy storage according to claim 4 is characterized in that: The coil (20) is placed at the rear end of the first punch (4), and the coil (20) and the first punch (4) are both arranged in the inner cavity of the sleeve (2) with the end cover (1); A punch rod (13) for striking the nail (15) at high speed is provided at the head end of the second punch.

6. The portable electromagnetic nail connection acceleration device based on spring energy storage according to claim 5 is characterized in that: A first punch reset spring (18) is arranged in the sleeve, and two ends of the first punch reset spring are respectively connected to the first punch and the limit plate (4). When the coil stops applying electromagnetic force, the first punch is reset under the drive of the first punch reset spring.

7. The portable electromagnetic nail connection acceleration device based on spring energy storage according to claim 4 is characterized in that: A trigger reset spring (24) is connected between the head end of the first punch and the tail end of the trigger. The trigger reset spring is stretched during the energy storage process of the energy storage spring. When the elastic potential energy of the energy storage spring is released and the square pin is not inserted into the slot of the first limiting sleeve, the trigger moves toward the coil direction and resets under the elastic force of the trigger reset spring.

8. The portable electromagnetic nail connection acceleration device based on spring energy storage according to claim 4 is characterized in that: A rubber pad (21) for buffering is provided at the coil; both ends of the coil are connected to a discharge control system, and the electromagnetic force generated by the coil drives the first punch to move via the driving copper plate (3).

9. The portable electromagnetic nail connection acceleration device based on spring energy storage according to claim 2 is characterized in that: The first limiting sleeve has a central axis of the first limiting sleeve as a symmetric axis, and symmetrical square notches are symmetrically provided on the wall of the first limiting sleeve to match the square pin, and one side of the symmetrical square notches is an inclined surface; each pair of square notches is distributed along the wall of the first limiting sleeve in the direction of the first limiting sleeve; The square pin and the square pin spring are embedded in the trigger, and their height does not exceed the first limiting sleeve. When the trigger is impacted by the first punch, the trigger moves and compresses the square pin spring to enter the next square notch.

10. The working method of the portable electromagnetic nail connection acceleration device based on spring energy storage is characterized by: In the method, by adjusting the length of the first limiting sleeve where the trigger is located, the compression amount of the energy storage spring can be accurately controlled each time the cylindrical pin of the second punch is pressed in, thereby achieving quantitative release of elastic potential energy converted by electromagnetic force, comprising the following steps; Step S1: Assemble the components of the acceleration device; adjust the length of the first limiting sleeve where the trigger is located; Step S2: Turn on the power supply and perform the first discharge. The trigger is impacted, causing the square pin to enter the second slot from the first slot of the first limiting sleeve, the energy storage spring is compressed for a certain distance, and the first punch reset spring causes the first punch to return to the initial position; Step S3: Continue to turn on the power supply and perform the second discharge. Similar to the previous step, the square pin is stuck in the third slot. At this time, the trigger and the cylindrical pin are close to each other again, and the spring energy storage increases. Step S4: Align the nail with the sample and turn on the power. When the subsequent discharge impact presses the cylindrical pin into the groove of the second limiting sleeve, the elastic potential energy of the energy storage spring is released, driving the second punch to accelerate, and the punch rod collides with the nail, causing it to be shot into the sample at a high speed. Step S5: Manually press the square pins on both sides of the trigger into the first limiting sleeve, and the trigger is reset under the action of the trigger reset spring, and the device returns to the initial state.

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